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Versions: 00 01 02 03 04 05 06 07 08 09 10 11 12           Informational
          13 14 15 16 17 18                                             
Network Working Group                                 S. Smyshlyaev, Ed.
Internet-Draft                                                 CryptoPro
Intended status: Informational                              D. Belyavsky
Expires: December 7, 2021                                      Cryptocom
                                                             M. Saarinen
                                                  Independent Consultant
                                                            June 5, 2021


 GOST Cipher Suites for Transport Layer Security (TLS) Protocol Version
                                  1.2
                 draft-smyshlyaev-tls12-gost-suites-12

Abstract

   This document specifies three new cipher suites for the Transport
   Layer Security (TLS) protocol Version 1.2 to support the Russian
   cryptographic standard algorithms (called GOST algorithms).

   This specification is developed to facilitate implementations that
   wish to support the GOST algorithms.  This document does not imply
   IETF endorsement of the cipher suites.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF).  Note that other groups may also distribute
   working documents as Internet-Drafts.  The list of current Internet-
   Drafts is at https://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on December 7, 2021.

Copyright Notice

   Copyright (c) 2021 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents
   (https://trustee.ietf.org/license-info) in effect on the date of



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   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
   to this document.  Code Components extracted from this document must
   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Conventions Used in This Document . . . . . . . . . . . . . .   4
   3.  Basic Terms and Definitions . . . . . . . . . . . . . . . . .   4
   4.  Cipher Suite Definitions  . . . . . . . . . . . . . . . . . .   5
     4.1.  Record Payload Protection . . . . . . . . . . . . . . . .   6
       4.1.1.  CTR_OMAC  . . . . . . . . . . . . . . . . . . . . . .   7
       4.1.2.  CNT_IMIT  . . . . . . . . . . . . . . . . . . . . . .   8
     4.2.  Key Exchange and Authentication . . . . . . . . . . . . .   9
       4.2.1.  Hello Messages  . . . . . . . . . . . . . . . . . . .  10
       4.2.2.  Server Certificate  . . . . . . . . . . . . . . . . .  11
       4.2.3.  CertificateRequest  . . . . . . . . . . . . . . . . .  11
       4.2.4.  ClientKeyExchange . . . . . . . . . . . . . . . . . .  11
         4.2.4.1.  CTR_OMAC  . . . . . . . . . . . . . . . . . . . .  12
         4.2.4.2.  CNT_IMIT  . . . . . . . . . . . . . . . . . . . .  14
       4.2.5.  CertificateVerify . . . . . . . . . . . . . . . . . .  16
       4.2.6.  Finished  . . . . . . . . . . . . . . . . . . . . . .  17
     4.3.  Cryptographic Algorithms  . . . . . . . . . . . . . . . .  17
       4.3.1.  Block Cipher  . . . . . . . . . . . . . . . . . . . .  17
       4.3.2.  MAC algorithm . . . . . . . . . . . . . . . . . . . .  17
       4.3.3.  Encryption algorithm  . . . . . . . . . . . . . . . .  18
       4.3.4.  PRF and HASH algorithms . . . . . . . . . . . . . . .  18
       4.3.5.  SNMAX parameter . . . . . . . . . . . . . . . . . . .  18
   5.  New Values for the SignatureAlgorithm Registry  . . . . . . .  18
   6.  New Values for the Supported Groups Registry  . . . . . . . .  19
   7.  New Values for the ClientCertificateType Identifiers Registry  20
   8.  Additional Algorithms . . . . . . . . . . . . . . . . . . . .  21
     8.1.  TLSTREE . . . . . . . . . . . . . . . . . . . . . . . . .  21
       8.1.1.  Key Tree Parameters . . . . . . . . . . . . . . . . .  21
     8.2.  Key export and key import algorithms  . . . . . . . . . .  22
       8.2.1.  KExp15 and KImp15 Algorithms  . . . . . . . . . . . .  22
       8.2.2.  KExp28147 and KImp28147 Algorithms  . . . . . . . . .  23
     8.3.  Key Exchange Generation Algorithms  . . . . . . . . . . .  24
       8.3.1.  KEG Algorithm . . . . . . . . . . . . . . . . . . . .  24
       8.3.2.  KEG_28147 Algorithm . . . . . . . . . . . . . . . . .  26
     8.4.  gostIMIT28147 . . . . . . . . . . . . . . . . . . . . . .  27
   9.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  27
   10. Historical considerations . . . . . . . . . . . . . . . . . .  29
   11. Security Considerations . . . . . . . . . . . . . . . . . . .  30
   12. References  . . . . . . . . . . . . . . . . . . . . . . . . .  30



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     12.1.  Normative References . . . . . . . . . . . . . . . . . .  30
     12.2.  Informative References . . . . . . . . . . . . . . . . .  32
   Appendix A.  Test Examples  . . . . . . . . . . . . . . . . . . .  33
     A.1.  Test Examples for CTR_OMAC cipher suites  . . . . . . . .  33
       A.1.1.  TLSTREE Examples  . . . . . . . . . . . . . . . . . .  33
         A.1.1.1.  TLS_GOSTR341112_256_WITH_MAGMA_CTR_OMAC
                   ciphersuite . . . . . . . . . . . . . . . . . . .  33
         A.1.1.2.  TLS_GOSTR341112_256_WITH_KUZNYECHIK_CTR_OMAC
                   ciphersuite . . . . . . . . . . . . . . . . . . .  35
       A.1.2.  Record Examples . . . . . . . . . . . . . . . . . . .  37
         A.1.2.1.  TLS_GOSTR341112_256_WITH_MAGMA_CTR_OMAC
                   ciphersuite . . . . . . . . . . . . . . . . . . .  37
         A.1.2.2.  TLS_GOSTR341112_256_WITH_KUZNYECHIK_CTR_OMAC
                   ciphersuite . . . . . . . . . . . . . . . . . . .  40
       A.1.3.  Handshake Examples  . . . . . . . . . . . . . . . . .  43
         A.1.3.1.  TLS_GOSTR341112_256_WITH_MAGMA_CTR_OMAC
                   ciphersuite . . . . . . . . . . . . . . . . . . .  43
         A.1.3.2.  TLS_GOSTR341112_256_WITH_KUZNYECHIK_CTR_OMAC
                   ciphersuite . . . . . . . . . . . . . . . . . . .  57
     A.2.  Test Examples for CNT_IMIT cipher suites  . . . . . . . .  76
       A.2.1.  Record Examples . . . . . . . . . . . . . . . . . . .  76
       A.2.2.  Handshake Examples  . . . . . . . . . . . . . . . . .  77
   Appendix B.  Contributors . . . . . . . . . . . . . . . . . . . .  90
   Appendix C.  Acknowledgments  . . . . . . . . . . . . . . . . . .  91
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  91

1.  Introduction

   This document specifies three new cipher suites for the Transport
   Layer Security (TLS) Protocol Version 1.2 [RFC5246] to support the
   set of Russian cryptographic standard algorithms (called GOST
   algorithms).  These cipher suites use the same hash algorithm GOST R
   34.11-2012 [GOST3411-2012] (the English version can be found in
   [RFC6986]) and the same signature algorithm GOST R 34.10-2012
   [GOST3410-2012] (the English version can be found in [RFC7091]) but
   use different encryption and MAC algorithms, so they are divided into
   two types: the CTR_OMAC cipher suites and the CNT_IMIT cipher suite.

   The CTR_OMAC cipher suites use the GOST R 34.12-2015 [GOST3412-2015]
   block ciphers (the English version can be found in [RFC7801]).

   The CNT_IMIT cipher suite uses the GOST 28147-89 [GOST28147-89] block
   cipher (the English version can be found in [RFC5830]).

   This document specifies cipher suites only for the TLS protocol
   version 1.2.  The cipher suites for the TLS protocol version 1.3
   [RFC8446] to support the set of Russian cryptographic standard
   algorithms are specified in a separate document [DraftGostTLS13].



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2.  Conventions Used in This Document

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and
   "OPTIONAL" in this document are to be interpreted as described in BCP
   14 [RFC2119] [RFC8174] when, and only when, they appear in all
   capitals, as shown here.

3.  Basic Terms and Definitions

   This document uses the following terms and definitions for the sets
   and operations on the elements of these sets:

   B_t     the set of byte strings of length t, t >= 0, for t = 0 the
           B_t set consists of a single empty string of zero length.  If
           A is an element of B_t, then A = (a_1, a_2, ... , a_t), where
           a_1, a_2, ... , a_t are in {0, ... , 255};

   B*      the set of all byte strings of a finite length (hereinafter
           referred to as strings), including the empty string;

   A[i..j] the string A[i..j] = (a_i, a_{i+1}, ... , a_j) in B_{j-i+1}
           where A = (a_1, ... , a_t) in B_t and 1<=i<=j<=t;

   |A|     the length of the byte string A in bytes;

   A | C   concatenation of strings A and C both belonging to B*, i.e.,
           a string in B_{|A|+|C|}, where the left substring in B_|A| is
           equal to A, and the right substring in B_|C| is equal to C;

   A XOR C bitwise exclusive-or of byte strings A and C both belonging
           to B_t (i.e. both are of length t bytes), i.e., a string in
           B_t such that if A = (a_1, a_2, ... , a_t), C = (c_1, c_2,
           ... , c_t) then A XOR C = (a_1 (xor) c_1, a_2 (xor) c_2, ...
           , a_t (xor) c_t) where (xor) is bitwise exclusive-or of
           bytes;

   i & j   bitwise AND of integers i and j;

   STR_t   the transformation that maps an integer i = 256^{t-1} * i_1 +
           ... + 256 * i_{t-1} + i_t into the byte string STR_t(i) =
           (i_1, ... , i_t) in B_t (the interpretation of the integer as
           a byte string in big-endian format);

   str_t   the transformation that maps an integer i = 256^{t-1} * i_t +
           ... + 256 * i_2 + i_1 into the byte string str_t(i) = (i_1,
           ... , i_t) in B_t (the interpretation of the integer as a
           byte string in little-endian format);



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   INT     the transformation that maps a string a = (a_1, ... , a_t) in
           B_t into the integer INT(a) = 256^{t-1} * a_1 + ... + 256 *
           a_{t-1} + a_t (the interpretation of the byte string in big-
           endian format as an integer);

   int     the transformation that maps a string a = (a_1, ... , a_t) in
           B_t into the integer int(a) = 256^{t-1} * a_t + ... + 256 *
           a_2 + a_1 (the interpretation of the byte string in little-
           endian format as an integer);

   k       the length of the block cipher key in bytes;

   n       the length of the block cipher block in bytes;

   Q_c     the public key stored in the client's certificate;

   d_c     the private key that corresponds to the Q_c key;

   Q_s     the public key stored in the server's certificate;

   d_s     the private key that corresponds to the Q_s key;

   q_s     an order of a cyclic subgroup of elliptic curve points group
           containing point Q_s;

   P_s     the point of order q_s that belongs to the same curve as Q_s;

   r_c     the random string contained in ClientHello.random field (see
           [RFC5246]);

   r_s     the random string contained in ServerHello.random field (see
           [RFC5246]).

4.  Cipher Suite Definitions

   This document specifies the CTR_OMAC cipher suites and the CNT_IMIT
   cipher suite.

   The CTR_OMAC cipher suites have the following values:

      TLS_GOSTR341112_256_WITH_KUZNYECHIK_CTR_OMAC = {0xC1, 0x00};
      TLS_GOSTR341112_256_WITH_MAGMA_CTR_OMAC = {0xC1, 0x01}.

   The CNT_IMIT cipher suite has the following value:

      TLS_GOSTR341112_256_WITH_28147_CNT_IMIT = {0xC1, 0x02}.





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4.1.  Record Payload Protection

   The compression method (see Section 6.2.2 of [RFC5246]) MUST be
   "null" in all of the cipher suites described in this document.  This
   compression method is negotiated according to Section 4.2.1.  Note
   that the CompressionMethod.null operation is an identity operation;
   no fields of the TLSCompressed structure are altered.

   All of the cipher suites described in this document use the stream
   cipher (see Section 4.3.3) to protect records.  The TLSCiphertext
   structure for the CTR_OMAC and CNT_IMIT cipher suites is specified in
   accordance with the Standard Stream Cipher case (see Section 6.2.3.1
   of [RFC5246]):


   struct {
       ContentType type;
       ProtocolVersion version;
       uint16 length;
       GenericStreamCipher fragment;
   } TLSCiphertext;


   where TLSCiphertext.fragment is generated in accordance with
   Section 4.1.1 when the CTR_OMAC cipher suite is used and
   Section 4.1.2 when the CNT_IMIT cipher suite is used.

   The connection key material is a key material that consists of the
   sender_write_key (either the client_write_key or the
   server_write_key), the sender_write_MAC_key (either the
   client_write_MAC_key or the server_write_MAC_key) and the
   sender_write_IV (either the client_write_IV or the server_write_IV)
   parameters that are generated in accordance with Section 6.3 of
   [RFC5246].

   The record key material is a key material that is generated from the
   connection key material and is used to protect a record with the
   certain sequence number.  Note that in some cipher suites defined in
   this document the record key material can be equal to the connection
   key material.

   In this section the TLSCiphertext.fragment generation is described
   for one particular endpoint (server or client) with the corresponding
   connection key material and record key material.







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4.1.1.  CTR_OMAC

   In case of the CTR_OMAC cipher suites the record key material differs
   from the connection key material, and for the sequence number seqnum
   consists of:

   o  K_ENC_seqnum in B_k;

   o  K_MAC_seqnum in B_k;

   o  IV_seqnum in B_{n/2}.

   The K_ENC_seqnum and K_MAC_seqnum values are calculated using the
   TLSTREE function defined in Section 8.1, the connection key material
   and the sequence number seqnum.  IV_seqnum is calculated by adding
   seqnum value to sender_write_IV modulo 2^{(n/2)*8}:

   o  K_ENC_seqnum = TLSTREE(sender_write_key, seqnum);

   o  K_MAC_seqnum = TLSTREE(sender_write_MAC_key, seqnum);

   o  IV_seqnum = STR_{n/2}((INT(sender_write_IV) + seqnum) mod
      2^{(n/2)*8}).

   The TLSCiphertext.fragment that corresponds to the sequence number
   seqnum is equal to the ENCValue_seqnum value that is calculated as
   follows:

   1.  The MACValue_seqnum value is generated using the MAC algorithm
   (see Section 4.3.2) similar to Section 6.2.3.1 of [RFC5246] except
   the sender_write_MAC_key is replaced by the K_MAC_seqnum key:

      MACValue_seqnum = MAC(K_MAC_seqnum, STR_8(seqnum) | type_seqnum |
      version_seqnum | length_seqnum | fragment_seqnum),

   where type_seqnum, version_seqnum, length_seqnum, fragment_seqnum are
   the TLSCompressed.type, TLSCompressed.version, TLSCompressed.length
   and TLSCompressed.fragment values of the record with the seqnum
   sequence number.

   2.  The entire data with the MACValue is encrypted with the ENC
   stream cipher (see Section 4.3.3):

      ENCValue_seqnum = ENC(K_ENC_seqnum, IV_seqnum, fragment_seqnum |
      MACValue_seqnum),

   where fragment_seqnum is the TLSCompressed.fragment value of the
   record with the seqnum sequence number.



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4.1.2.  CNT_IMIT

   In case of the CNT_IMIT cipher suite the record key material is equal
   to the connection key material and consists of:

   o  sender_write_key in B_k;

   o  sender_write_MAC_key in B_k;

   o  sender_write_IV in B_n.

   The TLSCiphertext.fragment that corresponds to the sequence number
   seqnum is equal to the ENCValue_seqnum value that is calculated as
   follows:

   1.  The MACValue_seqnum value is generated by the MAC algorithm (see
   Section 4.3.2) as follows:

      MACValue_seqnum = MAC(sender_write_MAC_key, STR_8(0) | type_0 |
      version_0 | length_0 | fragment_0 | ... | STR_8(seqnum) |
      type_seqnum | version_seqnum | length_seqnum | fragment_seqnum),

   where type_i, version_i, length_i, fragment_i, i in {0, ... ,
   seqnum}, are the TLSCompressed.type, TLSCompressed.version,
   TLSCompressed.length and TLSCompressed.fragment values of the record
   with the i sequence number.

   Due to the use of the CBC-MAC based mode (see Section 4.3.2)
   producing the MACValue_seqnum value does not mean processing all
   previous records.  It is enough to store only an intermediate
   internal state of the MAC algorithm.

   2.  The entire data with the MACValue is encrypted with the ENC
   stream cipher (see Section 4.3.3):

      ENCValue_0 | ... | ENCValue_seqnum = ENC(sender_write_key,
      sender_write_IV, fragment_0 | MACValue_0 | ... | fragment_seqnum |
      MACValue_seqnum),

   where the length of the byte string ENCValue_i in bytes is equal to
   the length of the byte string (fragment_i | MACValue_i) in bytes, i
   in {0, ... , seqnum}.

   Due to the use of the stream cipher (see Section 4.3.3) producing the
   ENCValue_seqnum value does not mean processing all previous records.
   It is enough to store only an intermediate internal state of the ENC
   stream cipher.




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4.2.  Key Exchange and Authentication

   All of the cipher suites described in this document use a key
   encapsulation mechanism based on Diffie-Hellman to share the TLS
   premaster secret.

         Client                                               Server

         ClientHello                  -------->
                                                         ServerHello
                                                         Certificate
                                                  CertificateRequest*
                                      <--------      ServerHelloDone
         Certificate*
         ClientKeyExchange
         CertificateVerify*
         [ChangeCipherSpec]
         Finished                     -------->
                                                  [ChangeCipherSpec]
                                      <--------             Finished
         Application Data             <------->     Application Data

                   Figure 1: Message flow for a full handshake.

         * Indicates optional messages that are sent for
         the client authentication.

         Note: To help avoid pipeline stalls, ChangeCipherSpec is an
         independent TLS protocol content type, and is not actually
         a TLS handshake message.


   Figure 1 shows all messages involved in the TLS key establishment
   protocol (full handshake).  A ServerKeyExchange MUST NOT be sent (the
   server's certificate contains enough data to allow client to exchange
   the premaster secret).

   The server side of the channel is always authenticated; the client
   side is optionally authenticated.  The server is authenticated by
   proving that it knows the premaster secret that is encrypted with the
   public key Q_s from the server's certificate.  The client is
   authenticated via its signature over the handshake transcript.

   In general the key exchange process for both CTR_OMAC and CNT_IMIT
   cipher suites consists of the following steps:






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   1.  The client generates the ephemeral key pair (d_eph, Q_eph) that
       corresponds to the server's public key Q_s stored in its
       certificate.

   2.  The client generates the premaster secret PS.  The PS value is
       chosen from B_32 at random.

   3.  Using d_eph and Q_s the client generates the export key material
       (see Section 4.2.4.1 and Section 4.2.4.2) for the particular key
       export algorithm (see Section 8.2.1 and Section 8.2.2) to
       generate the export representation PSExp of the PS value.

   4.  The client sends its ephemeral public key Q_eph and PSExp value
       in the ClientKeyExchange message.

   5.  Using its private key d_s the server generates the import key
       material (see Section 4.2.4.1 and Section 4.2.4.2) for the
       particular key import algorithm (see Section 8.2.1 and
       Section 8.2.2) to extract the premaster secret PS from the export
       representation PSExp.

   The cipher suites specified in this document define the ClientHello,
   ServerHello, server Certificate, CertificateRequest,
   ClientKeyExchange, CertificateVerify and Finished handshake messages,
   that are described in further detail below.

4.2.1.  Hello Messages

   The ClientHello message is generated in accordance with
   Section 7.4.1.2 of [RFC5246] and must meet the following
   requirements:

   o  The ClientHello.compression_methods field MUST contain exactly one
      byte, set to zero, which corresponds to the "null" compression
      method.

   o  The ClientHello.extensions field MUST contain the
      signature_algorithms extension (see [RFC5246]).

      If the negotiated cipher suite is one of CTR_OMAC/CTR_IMIT and the
      client implementation does not support generating the
      signature_algorithms extension with the values defined in
      Section 5, the server MUST either abort the connection or ignore
      this extension and behave as if the client had sent the
      signature_algorithms extension with the values {8, 64} and {8,
      65}.





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   The ServerHello message is generated in accordance with
   Section 7.4.1.3 of [RFC5246] and must meet the following
   requirements:

   o  The ServerHello.compression_method field MUST contain exactly one
      byte, set to zero, which corresponds to the "null" compression
      method.

   o  The ServerHello.extensions field MUST NOT contain the
      encrypt_then_mac extension (see [RFC7366]).

4.2.2.  Server Certificate

   This message is used to authentically convey the server's public key
   Q_s to the client and is generated in accordance with Section 7.4.2
   of [RFC5246].

   Upon receiving this message the client validates the certificate
   chain, extracts the server's public key, and checks that the key type
   is appropriate for the negotiated key exchange algorithm.  (A
   possible reason for a fatal handshake failure is that the client's
   capabilities for handling elliptic curves and point formats are
   exceeded).

4.2.3.  CertificateRequest

   This message is sent by the server when requesting client
   authentication and is generated in accordance with Section 7.4.4 of
   [RFC5246].

   If the CTR_OMAC or CNT_IMIT cipher suite is negotiated, the
   CertificateRequest message MUST meet the following requirements:

   o  the CertificateRequest.supported_signature_algorithm field MUST
      contain only signature/hash algorithm pairs with the values {8,
      64} or {0, 65} defined in Section 5;

   o  the CertificateRequest.certificate_types field MUST contain only
      the gost_sign256 (67) or gost_sign512 (68) values defined in
      Section 7.

4.2.4.  ClientKeyExchange

   The ClientKeyExchange message is defined as follows.







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   enum { vko_kdf_gost, vko_gost } KeyExchangeAlgorithm;

   struct {
       select (KeyExchangeAlgorithm) {
           case vko_kdf_gost: GostKeyTransport;
           case vko_gost: TLSGostKeyTransportBlob;
       } exchange_keys;
   } ClientKeyExchange;


   The body of the ClientKeyExchange message consists of a
   GostKeyTransport/TLSGostKeyTransportBlob structure that contains an
   export representation of the premaster secret PS.

   The GostKeyTransport structure corresponds to the CTR_OMAC cipher
   suites and is described in Section 4.2.4.1 and the
   TLSGostKeyTransportBlob corresponds to CNT_IMIT cipher suite and is
   described in Section 4.2.4.2.

4.2.4.1.  CTR_OMAC

   In case of the CTR_OMAC cipher suites the body of the
   ClientKeyExchange message consists of the GostKeyTransport structure
   that is defined bellow.

   The client generates the ClientKeyExchange message in accordance with
   the following steps:

   1.  Generates the ephemeral key pair (Q_eph, d_eph), where:

      d_eph is chosen from {1, ... , q_s - 1} at random;

      Q_eph = d_eph * P_s.

   2.  Generates export keys (K_EXP_MAC and K_EXP_ENC) using the KEG
   algorithm defined in Section 8.3.1:

      H = HASH(r_c | r_s);

      K_EXP_MAC | K_EXP_ENC = KEG(d_eph, Q_s, H).

   3.  Generates an export representation PSExp of the premaster secret
   PS using the KExp15 algorithm defined in Section 8.2.1:

      IV = H[25..24 + n / 2];

      PSExp = KExp15(PS, K_EXP_MAC, K_EXP_ENC, IV).




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   4.  Generates the ClientKeyExchange message using the
   GostKeyTransport structure that is defined as follows:



   GostKeyTransport ::= SEQUENCE {
       keyExp               OCTET STRING,
       ephemeralPublicKey   SubjectPublicKeyInfo,
       ukm                  OCTET STRING OPTIONAL
   }

   SubjectPublicKeyInfo ::= SEQUENCE {
       algorithm            AlgorithmIdentifier,
       subjectPublicKey     BIT STRING
   }
   AlgorithmIdentifier ::= SEQUENCE {
       algorithm            OBJECT IDENTIFIER,
       parameters           ANY OPTIONAL
   }


   where the keyExp field contains the PSExp value, the
   ephemeralPublicKey field contains the Q_eph value and the ukm field
   MUST be ignored by the server.

   Upon receiving the ClientKeyExchange message, the server process it
   as follows.

   1.  Checks the following three conditions.  If either of these checks
   fails, then the server MUST abort the handshake with an alert.

   o  Q_eph belongs to the same curve as server public key Q_s;

   o  Q_eph is not equal to zero point;

   o  q_s * Q_eph is equal to zero point.

   2.  Generates export keys (K_EXP_MAC and K_EXP_ENC) using the KEG
   algorithm defined in Section 8.3.1:

      H = HASH(r_c | r_s);

      K_EXP_MAC | K_EXP_ENC = KEG(d_s, Q_eph, H).

   3.  Extracts the premaster secret PS from the export representation
   PSExp using the KImp15 algorithm defined in Section 8.2.1:

      IV = H[25..24 + n / 2];



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      PS = KImp15(PSExp, K_EXP_MAC, K_EXP_ENC, IV).

4.2.4.2.  CNT_IMIT

   In case of the CNT_IMIT cipher suite the body of the
   ClientKeyExchange message consists of a TLSGostKeyTransportBlob
   structure that is defined bellow.

   The client generates the ClientKeyExchange message in accordance with
   the following steps:

   1.  Generates the ephemeral key pair (Q_eph, d_eph), where:

      d_eph is chosen from {1, ... , q_s - 1} at random;

      Q_eph = d_eph * P_s.

   2.  Generates export key (K_EXP) using the KEG_28147 algorithm
   defined in Section 8.3.2:

      H = HASH(r_c | r_s);

      K_EXP = KEG_28147(d_eph, Q_s, H).

   3.  Generates an export representation PSExp of the premaster secret
   PS using the KExp28147 algorithm defined in Section 8.2.2:

      PSExp = IV | CEK_ENC | CEK_MAC = KExp28147(PS, K_EXP, H[1..8]).

   4.  Generates the ClientKeyExchange message using the
   TLSGostKeyTransportBlob structure that is defined as follows:




















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   TLSGostKeyTransportBlob ::= SEQUENCE {
       keyBlob              GostR3410-KeyTransport,
   }
   GostR3410-KeyTransport ::= SEQUENCE {
       sessionEncryptedKey  Gost28147-89-EncryptedKey,
       transportParameters  [0] IMPLICIT GostR3410-TransportParameters
                            OPTIONAL
   }
   Gost28147-89-EncryptedKey ::= SEQUENCE {
       encryptedKey         Gost28147-89-Key,
       maskKey              [0] IMPLICIT Gost28147-89-Key OPTIONAL,
       macKey               Gost28147-89-MAC
   }
   GostR3410-TransportParameters ::= SEQUENCE {
       encryptionParamSet   OBJECT IDENTIFIER,
       ephemeralPublicKey   [0] IMPLICIT SubjectPublicKeyInfo OPTIONAL,
       ukm                  OCTET STRING
   }


   where GostR3410-KeyTransport, Gost28147-89-EncryptedKey and
   GostR3410-TransportParameters are defined according to Section 4.2.1
   of [RFC4490].

   In the context of this document the
   GostR3410-KeyTransport.transportParameters field is always used, the
   Gost28147-89-EncryptedKey.maskKey field is omitted, the
   GostR3410-KeyTransport.transportParameters.ephemeralPublicKey field
   is always used.

   The Gost28147-89-EncryptedKey.encryptedKey field contains the CEK_ENC
   value, the Gost28147-89-EncryptedKey.macKey field contains the
   CEK_MAC value, and GostR3410-TransportParameters.ukm field contains
   the IV value.

   The keyBlob.transportParameters.ephemeralPublicKey field contains the
   client ephemeral public key Q_eph.  The encryptionParamSet contains
   value 1.2.643.7.1.2.5.1.1 that corresponds to the id-tc26-gost-
   28147-param-Z parameters set defined in [RFC7836].

   Upon receiving the ClientKeyExchange message, the server process it
   as follows.

   1.  Checks the following three conditions.  If either of these checks
   fails, then the server MUST abort the handshake with an alert.

   o  Q_eph belongs to the same curve as server public key Q_s;




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   o  Q_eph is not equal to zero point;

   o  q_s * Q_eph is equal to zero point;

   2.  Generates export key (K_EXP) using the KEG_28147 algorithm
   defined in Section 8.3.2:

      H = HASH(r_c | r_s);

      K_EXP = KEG_28147(d_s, Q_eph, H).

   3.  Extracts the premaster secret PS from the export representation
   PSExp using the KImp28147 algorithm defined in Section 8.2.2:

      PS = KImp28147(PSExp, K_EXP, H[1..8]).

4.2.5.  CertificateVerify

   Client generates the value sgn as follows:


   sgn = SIGN_{d_c}(handshake_messages) = str_l(r) | str_l(s)


   where SIGN_{d_c} is the GOST R 34.10-2012 [RFC7091] signature
   algorithm, d_c is a client long-term private key that corresponds to
   the client long-term public key Q_c from the client's certificate, l
   = 32 for gostr34102012_256 value of the SignatureAndHashAlgorithm
   field and l = 64 for gostr34102012_512 value of the
   SignatureAndHashAlgorithm field.

   Here handshake_messages refers to all handshake messages sent or
   received, starting at ClientHello and up to CertificateVerify, but
   not including the last message, including the type and length fields
   of the handshake messages.

   The TLS CertificateVerify message is specified as follows.


   struct {
       SignatureAndHashAlgorithm algorithm;
       opaque signature<0..2^16-1>;
   } CertificateVerify;


   where SignatureAndHashAlgorithm structure is specified in Section 5
   and CertificateVerify.signature field contains sgn value.




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4.2.6.  Finished

   The TLS Finished message is generated in accordance with
   Section 7.4.9 of [RFC5246].

   The verify_data_length value is equal to 32 for the CTR_OMAC cipher
   suites and is equal to 12 for the CNT_IMIT cipher suite.  The PRF
   function is defined in Section 4.3.4.

4.3.  Cryptographic Algorithms

4.3.1.  Block Cipher

   The cipher suite TLS_GOSTR341112_256_WITH_KUZNYECHIK_CTR_OMAC MUST
   use Kuznyechik [RFC7801] as a base block cipher for the encryption
   and MAC algorithm.  The block length n is 16 bytes and the key length
   k is 32 bytes.

   The cipher suite TLS_GOSTR341112_256_WITH_MAGMA_CTR_OMAC MUST use
   Magma [GOST3412-2015] as a base block cipher for the encryption and
   MAC algorithm.  The block length n is 8 bytes and the key length k is
   32 bytes.

   The cipher suite TLS_GOSTR341112_256_WITH_28147_CNT_IMIT MUST use
   GOST 28147-89 as a base block cipher [RFC5830] with the set of
   parameters id-tc26-gost-28147-param-Z defined in [RFC7836].  The
   block length n is 8 bytes and the key length k is 32 bytes.

4.3.2.  MAC algorithm

   The CTR_OMAC cipher suites use the OMAC message authentication code
   construction defined in [GOST3413-2015], which can be considered as
   the CMAC mode defined in [CMAC] where Kuznyechik or Magma block
   cipher (see Section 4.3.1) are used instead of AES block cipher (see
   [IK2003] for more detail) as the MAC function.  The resulting MAC
   length is equal to the block length and the MAC key length is 32
   bytes.

   The CNT_IMIT cipher suite uses the message authentication code
   function gostIMIT28147 defined in Section 8.4 with the initialization
   vector IV = IV0, where IV0 in B_8 is a string of all zeros, with the
   CryptoPro Key Meshing algorithm defined in [RFC4357].  The resulting
   MAC length is 4 bytes and the MAC key length is 32 bytes.








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4.3.3.  Encryption algorithm

   The CTR_OMAC cipher suites use the block cipher in CTR-ACPKM
   encryption mode defined in [RFC8645] as the ENC function.  The
   section size N is 4 KB for
   TLS_GOSTR341112_256_WITH_KUZNYECHIK_CTR_OMAC cipher suite and 1 KB
   for TLS_GOSTR341112_256_WITH_MAGMA_CTR_OMAC cipher suite.

   The CNT_IMIT cipher suite uses the block cipher in counter encryption
   mode (CNT) defined in Section 6 of [RFC5830] with the CryptoPro Key
   Meshing algorithm defined in [RFC4357] as the ENC function.

4.3.4.  PRF and HASH algorithms

   The pseudorandom function (PRF) for all the cipher suites defined in
   this document is the PRF_TLS_GOSTR3411_2012_256 function defined in
   [RFC7836].

   The hash function HASH for all the cipher suites defined in this
   document is the GOST R 34.11-2012 [RFC6986] hash algorithm with
   32-byte (256-bit) hash code.

4.3.5.  SNMAX parameter

   The SNMAX parameter defines the maximal value of the sequence number
   seqnum during one TLS 1.2 connection and is defined as follows:


   +---------------------------------------------+--------------------+
   |               CipherSuites                  |        SNMAX       |
   +---------------------------------------------+--------------------+
   |TLS_GOSTR341112_256_WITH_KUZNYECHIK_CTR_OMAC | SNMAX = 2^64 - 1   |
   |TLS_GOSTR341112_256_WITH_28147_CNT_IMIT      |                    |
   +---------------------------------------------+--------------------+
   |TLS_GOSTR341112_256_WITH_MAGMA_CTR_OMAC      | SNMAX = 2^32 - 1   |
   +---------------------------------------------+--------------------+
                                 Table 1


5.  New Values for the SignatureAlgorithm Registry

   The signature/hash algorithm pairs are used to indicate to the
   server/client which algorithms can be used in digital signatures and
   are defined by the SignatureAndHashAlgorithm structure (see
   Section 7.4.1.4.1 of [RFC5246]).






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   This document defines new values for the "SignatureAlgorithm
   Registry" that can be used in the SignatureAndHashAlgorithm.signature
   field for the particular signature/hash algorithm pair:


   enum {
       gostr34102012_256(64),
       gostr34102012_512(65),
   } SignatureAlgorithm;


   where the gostr34102012_256 and gostr34102012_512 values correspond
   to the GOST R 34.10-2012 [RFC7091] signature algorithm with 32-byte
   (256-bit) and 64-byte (512-bit) key length respectively.

   According to [RFC7091] the GOST R 34.10-2012 signature algorithm with
   32-byte (256-bit) or 64-byte (512-bit) key length use the GOST R
   34.11-2012 [RFC6986] hash algorithm with 32-byte (256-bit) or 64-byte
   (512-bit) hash code respectively (the hash algorithm is intrinsic to
   the signature algorithm).  Therefore, if the
   SignatureAndHashAlgorithm.signature field of a particular hash/
   signature pair listed in the Signature Algorithms Extension is equal
   to the 64 (gostr34102012_256) or 65 (gostr34102012_512) value, the
   SignatureAndHashAlgorithm.hash field of this pair MUST contain the
   "Intrinsic" value 8 (see [RFC8422]).

6.  New Values for the Supported Groups Registry

   The Supported Groups Extension indicates the set of elliptic curves
   supported by the client and is defined in [RFC8422] and [RFC7919].

   This document defines new values for the "Supported Groups" registry:


   enum {
       GC256A(34), GC256B(35), GC256C(36), GC256D(37),
       GC512A(38), GC512B(39), GC512C(40),
   } NamedGroup;


   Where the values corresponds to the following curves:










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   +-------------+--------------------------------------+-----------+
   | Description |      Curve Identifier Value          | Reference |
   +-------------+--------------------------------------+-----------+
   |   GC256A    | id-tc26-gost-3410-2012-256-paramSetA |  RFC 7836 |
   +-------------+--------------------------------------+-----------+
   |   GC256B    |id-GostR3410-2001-CryptoPro-A-ParamSet|  RFC 4357 |
   +-------------+--------------------------------------+-----------+
   |   GC256C    |id-GostR3410-2001-CryptoPro-B-ParamSet|  RFC 4357 |
   +-------------+--------------------------------------+-----------+
   |   GC256D    |id-GostR3410-2001-CryptoPro-C-ParamSet|  RFC 4357 |
   +-------------+--------------------------------------+-----------+
   |   GC512A    |  id-tc26-gost-3410-12-512-paramSetA  |  RFC 7836 |
   +-------------+--------------------------------------+-----------+
   |   GC512B    |  id-tc26-gost-3410-12-512-paramSetB  |  RFC 7836 |
   +-------------+--------------------------------------+-----------+
   |   GC512C    | id-tc26-gost-3410-2012-512-paramSetC |  RFC 7836 |
   +-------------+--------------------------------------+-----------+
                                 Table 2


7.  New Values for the ClientCertificateType Identifiers Registry

   The ClientCertificateType field of the CertificateRequest message
   contains a list of the types of certificate types that the client may
   offer and is defined in Section 7.4.4 of [RFC5246].

   This document defines new values for the "ClientCertificateType
   Identifiers" registry:


   enum {
       gost_sign256(67),
       gost_sign512(68),
   } ClientCertificateType;


   To use the gost_sign256 or gost_sign512 authentication mechanism, the
   client MUST possess a certificate containing a GOST R
   34.10-2012-capable public key that corresponds to the 32-byte
   (256-bit) or 64-byte (512-bit) signature key respectively.

   The client proves possession of the private key corresponding to the
   certified key by including a signature in the CertificateVerify
   message as described in Section 4.2.5.







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8.  Additional Algorithms

8.1.  TLSTREE

   The TLSTREE function is defined as follows:

      TLSTREE(K_root, i) = KDF_3(KDF_2(KDF_1(K_root, STR_8(i & C_1)),
      STR_8(i & C_2)), STR_8(i & C_3)),

   where

   o  K_root in B_32;

   o  i in {0, 1, ... , 2^64 - 1};

   o  C_1, C_2, C_3 are constants defined by the particular cipher suite
      (see Section 8.1.1);

   o  KDF_j(K, D), j = 1, 2, 3, K in B_32, D in B_8, is the key
      derivation function based on the KDF_GOSTR3411_2012_256 function
      defined in [RFC7836]:

      KDF_1(K, D) = KDF_GOSTR3411_2012_256(K, "level1", D);
      KDF_2(K, D) = KDF_GOSTR3411_2012_256(K, "level2", D);
      KDF_3(K, D) = KDF_GOSTR3411_2012_256(K, "level3", D).


8.1.1.  Key Tree Parameters

   The CTR_OMAC cipher suites use the TLSTREE function for the re-keying
   approach.  The constants for it are defined as in the table below.


   +--------------------------------------------+----------------------+
   |               CipherSuites                 |    C_1, C_2, C_3     |
   +--------------------------------------------+----------------------+
   |TLS_GOSTR341112_256_WITH_KUZNYECHIK_CTR_OMAC|C_1=0xFFFFFFFF00000000|
   |                                            |C_2=0xFFFFFFFFFFF80000|
   |                                            |C_3=0xFFFFFFFFFFFFFFC0|
   +--------------------------------------------+----------------------+
   |TLS_GOSTR341112_256_WITH_MAGMA_CTR_OMAC     |C_1=0xFFFFFFC000000000|
   |                                            |C_2=0xFFFFFFFFFE000000|
   |                                            |C_3=0xFFFFFFFFFFFFF000|
   +--------------------------------------------+----------------------+
                                 Table 3






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8.2.  Key export and key import algorithms

8.2.1.  KExp15 and KImp15 Algorithms

   Algorithms KExp15 and KImp15 use the block cipher determined by the
   particular cipher suite.

   The KExp15 key export algorithm is defined as follows.


   +------------------------------------------------------------+
   |   KExp15(S, K_Exp_MAC, K_Exp_ENC, IV)                      |
   |------------------------------------------------------------|
   |  Input:                                                    |
   |  - secret S to be exported, S in B*,                       |
   |  - key K_Exp_MAC in B_k,                                   |
   |  - key K_Exp_ENC in B_k,                                   |
   |  - IV in B_{n/2}                                           |
   |  Output:                                                   |
   |  - export representation SExp in B_{|S|+n}                 |
   |------------------------------------------------------------|
   |  1. CEK_MAC = OMAC(K_Exp_MAC, IV | S), CEK_MAC in B_n      |
   |  2. SExp = CTR-Encrypt(K_Exp_ENC, IV, S | CEK_MAC)         |
   |  3. return SExp                                            |
   +------------------------------------------------------------+


   where the OMAC function is defined in [MODES], the CTR-Encrypt(K, IV,
   S) function denotes the encryption of message S on key K and nonce IV
   in the CTR mode with s = n (see [MODES]).

   The KImp15 key import algorithm is defined as follows.



















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   +-------------------------------------------------------------------+
   |   KImp15(SExp, K_Exp_MAC, K_Exp_ENC, IV)                          |
   |-------------------------------------------------------------------|
   |  Input:                                                           |
   |  - export representation SExp in B*                               |
   |  - key K_Exp_MAC in B_k,                                          |
   |  - key K_Exp_ENC in B_k,                                          |
   |  - IV in B_{n/2}                                                  |
   |  Output:                                                          |
   |  - secret S in B_{|SExp|-n} or FAIL                               |
   |-------------------------------------------------------------------|
   |  1. S | CEK_MAC = CTR-Decrypt(K_Exp_ENC, IV, SExp), CEK_MAC in B_n|
   |  2. If CEK_MAC = OMAC(K_Exp_MAC, IV | S)                          |
   |        then return S; else return FAIL                            |
   +-------------------------------------------------------------------+


   where the OMAC function is defined in [MODES], the CTR-Decrypt(K, IV,
   S) function denotes the decryption of message S on key K and nonce IV
   in the CTR mode (see [MODES]).

   The keys K_Exp_MAC and K_Exp_ENC MUST be independent.  For every pair
   of keys (K_Exp_ENC, K_Exp_MAC) the IV values MUST be unique.  For the
   import of key K with the KImp15 algorithm every IV value MUST be sent
   with the export key representation or be a preshared value.

8.2.2.  KExp28147 and KImp28147 Algorithms

   The KExp28147 key export algorithm is defined as follows.


   +----------------------------------------------------------------+
   |   KExp28147(S, K, IV)                                          |
   |----------------------------------------------------------------|
   |  Input:                                                        |
   |  - secret S to be exported, S in B_32,                         |
   |  - key K in B_32,                                              |
   |  - IV in B_8.                                                  |
   |  Output:                                                       |
   |  - export representation SExp in B_44                          |
   |----------------------------------------------------------------|
   |  1. CEK_MAC = gost28147IMIT(IV, K, S), CEK_MAC in B_4          |
   |  2. CEK_ENC = ECB-Encrypt(K, S), CEK_ENC in B_32               |
   |  3. return SExp = IV | CEK_ENC | CEK_MAC                       |
   +----------------------------------------------------------------+






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   where the gost28147IMIT function is defined in Section 8.4, the ECB-
   Encrypt(K, S) function denotes the encryption of message S on key K
   with the block cipher GOST 28147-89 in the ECB mode (see [RFC5830]).

   The KImp28147 key import algorithm is defined as follows.


   +----------------------------------------------------------------+
   |   KImp28147(SExp, K, IV)                                       |
   |----------------------------------------------------------------|
   |  Input:                                                        |
   |  - export representation SExp in B_44,                         |
   |  - key K in B_32,                                              |
   |  - IV in B_8.                                                  |
   |  Output:                                                       |
   |  - imported secret S in B_32 or FAIL                           |
   |----------------------------------------------------------------|
   |  1. extract from SExp                                          |
   |             IV' = SExp[1..8],                                  |
   |             CEK_ENC = SExp[9..40],                             |
   |             CEK_MAC = SExp[41..44]                             |
   |  2. if IV' != IV then return FAIL; else                        |
   |  3. S = ECB-Decrypt(K, CEK_ENC), S in B_32                     |
   |  4. If CEK_MAC = gost28147IMIT(IV, K, S)                       |
   |        then return S; else return FAIL                         |
   +----------------------------------------------------------------+

   where the gost28147IMIT function is defined in Section 8.4, the ECB-
   Decrypt(CEK_ENC, M) function denotes the decryption of ciphertext
   CEK_ENC on key K with a block cipher GOST 28147-89 in the ECB mode
   (see [RFC5830]).

8.3.  Key Exchange Generation Algorithms

8.3.1.  KEG Algorithm

   The KEG algorithm is defined as follows:














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   +----------------------------------------------------------------+
   |  KEG(d, Q, H)                                                  |
   |----------------------------------------------------------------|
   |  Input:                                                        |
   |  - private key d,                                              |
   |  - public key Q,                                               |
   |  - H in B_32.                                                  |
   |  Output:                                                       |
   |  - key material K in B_64.                                     |
   |----------------------------------------------------------------|
   |  1. If q * Q is not equal to zero point                        |
   |        return FAIL                                             |
   |  2. If 2^{254} < q < 2^{256}                                   |
   |        return KEG_256(d, Q, H)                                 |
   |  3. If 2^{508} < q < 2^{512}                                   |
   |        return KEG_512(d, Q, H)                                 |
   |  4. return FAIL                                                |
   +----------------------------------------------------------------+

   where q is an order of a cyclic subgroup of elliptic curve points
   group containing point Q, d in {1, ... , q - 1}.

   The KEG_256 algorithm is defined as follows:


   +----------------------------------------------------------------+
   |  KEG_256(d, Q, H)                                              |
   |----------------------------------------------------------------|
   |  Input:                                                        |
   |  - private key d,                                              |
   |  - public key Q,                                               |
   |  - H in B_32.                                                  |
   |  Output:                                                       |
   |  - key material K in B_64.                                     |
   |----------------------------------------------------------------|
   |  1. r = INT(H[1..16])                                          |
   |  2. If r = 0                                                   |
   |        UKM = 1; else UKM = r                                   |
   |  3. K_EXP = VKO_256(d, Q, UKM)                                 |
   |  4. seed = H[17..24]                                           |
   |  5. return KDFTREE_256(K_EXP, "kdf tree", seed, 1)             |
   +----------------------------------------------------------------+

   where VKO_256 is the function VKO_GOSTR3410_2012_256 defined in
   [RFC7836] and KDFTREE_256 is the KDF_TREE_GOSTR3411_2012_256 function
   defined in [RFC7836] with the parameter L equal to 512.

   The KEG_512 algorithm is defined as follows:



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   +----------------------------------------------------------------+
   |  KEG_512(d, Q, H)                                              |
   |----------------------------------------------------------------|
   |  Input:                                                        |
   |  - private key d,                                              |
   |  - public key Q,                                               |
   |  - H in B_32.                                                  |
   |  Output:                                                       |
   |  - key material K in B_64.                                     |
   |----------------------------------------------------------------|
   |  1. r = INT(H[1..16])                                          |
   |  2. If r = 0                                                   |
   |        UKM = 1; else UKM = r                                   |
   |  3. return VKO_512(d, Q, UKM)                                  |
   +----------------------------------------------------------------+

   where VKO_512 is the VKO_GOSTR3410_2012_512 function defined in
   [RFC7836].

8.3.2.  KEG_28147 Algorithm

   The KEG_28147 algorithm is defined as follows:


   +----------------------------------------------------------------+
   |  KEG_28147(d, Q, H)                                            |
   |----------------------------------------------------------------|
   |  Input:                                                        |
   |  - private key d,                                              |
   |  - public key Q,                                               |
   |  - H in B_32.                                                  |
   |  Output:                                                       |
   |  - key material K in B_32.                                     |
   |----------------------------------------------------------------|
   |  1. If q * Q is not equal to zero point                        |
   |        return FAIL                                             |
   |  2. UKM = H[1..8]                                              |
   |  3. R = VKO_256(d, Q, int(UKM))                                |
   |  4. return K = CPDivers(UKM, R)                                |
   +----------------------------------------------------------------+

   where the VKO_256 function is equal to the VKO_GOSTR3410_2012_256
   function defined in [RFC7836], the CPDivers function corresponds to
   the CryptoPro KEK Diversification Algorithm defined in [RFC4357],
   which takes as input the UKM value and the key value.






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8.4.  gostIMIT28147

   gost28147IMIT(IV, K, M) is a MAC algorithm with 4 bytes output and is
   defined as follows:


   +----------------------------------------------------------------+
   |  gost28147IMIT(IV, K, M)                                       |
   |----------------------------------------------------------------|
   |  Input:                                                        |
   |  - initial value IV in B_8,                                    |
   |  - key K in B_32,                                              |
   |  - message M in B*.                                            |
   |  Output:                                                       |
   |  - MAC value T in B_4.                                         |
   |----------------------------------------------------------------|
   |  1. M' = PAD(M)                                                |
   |  2. M' = M'_0 | ... | M'_r, |M'_i| = 8, i in {0, ... , r}      |
   |  3. M'' = (M'_0 XOR IV) | M'_1 | ... | M'_r                    |
   |  4. return T = MAC28147(K, M'')                                |
   +----------------------------------------------------------------+

   where the PAD function is the padding function that adds m zero bytes
   to the end of the message, where m is the smallest, non-negative
   solution to the equation (|M| + m) mod 8 = 0, the MAC28147 function
   corresponds to Message Authentication Code Generation Mode defined in
   [RFC5830] with 4 byte length output.

9.  IANA Considerations

   IANA is asked to update the registry entries to reference this
   document when it is published as an RFC.

   IANA has added numbers {0xC1, 0x00}, {0xC1, 0x01} and {0xC1, 0x02}
   with the names TLS_GOSTR341112_256_WITH_KUZNYECHIK_CTR_OMAC,
   TLS_GOSTR341112_256_WITH_MAGMA_CTR_OMAC,
   TLS_GOSTR341112_256_WITH_28147_CNT_IMIT to the "TLS Cipher Suite"
   registry with this document as reference, as shown below.













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   +-------------+-----------------------------+---------+----------+
   |    Value    |         Description         | DTLS-OK | Reference|
   +-------------+-----------------------------+---------+----------+
   | 0xC1, 0x00  |     TLS_GOSTR341112_256_    |    N    | this RFC |
   |             |  _WITH_KUZNYECHIK_CTR_OMAC  |         |          |
   +-------------+-----------------------------+---------+----------+
   | 0xC1, 0x01  |     TLS_GOSTR341112_256_    |    N    | this RFC |
   |             |     _WITH_MAGMA_CTR_OMAC    |         |          |
   +-------------+-----------------------------+---------+----------+
   | 0xC1, 0x02  |     TLS_GOSTR341112_256_    |    N    | this RFC |
   |             |     _WITH_28147_CNT_IMIT    |         |          |
   +-------------+-----------------------------+---------+----------+
                                Table 4

   IANA has added numbers 64, 65 with the names gostr34102012_256,
   gostr34102012_512, to the "TLS SignatureAlgorithm" registry, as shown
   below.


   +-----------+---------------------+---------+----------+
   |   Value   |      Description    | DTLS-OK | Reference|
   +-----------+---------------------+---------+----------+
   |     64    |  gostr34102012_256  |    Y    | this RFC |
   +-----------+---------------------+---------+----------+
   |     65    |  gostr34102012_512  |    Y    | this RFC |
   +-----------+---------------------+---------+----------+
                            Table 5

   IANA has added numbers 34, 35, 36, 37, 38, 39, 40 with the names
   GC256A, GC256B, GC256C, GC256D, GC512A, GC512B, GC512C to the "TLS
   Supported Groups" registry, as shown below.




















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   +-----------+----------------+---------+------------+-----------+
   |   Value   |   Description  | DTLS-OK | Recomended | Reference |
   +-----------+----------------+---------+------------+-----------+
   |     34    |     GC256A     |    Y    |      N     | this RFC  |
   +-----------+----------------+---------+------------+-----------+
   |     35    |     GC256B     |    Y    |      N     | this RFC  |
   +-----------+----------------+---------+------------+-----------+
   |     36    |     GC256C     |    Y    |      N     | this RFC  |
   +-----------+----------------+---------+------------+-----------+
   |     37    |     GC256D     |    Y    |      N     | this RFC  |
   +-----------+----------------+---------+------------+-----------+
   |     38    |     GC512A     |    Y    |      N     | this RFC  |
   +-----------+----------------+---------+------------+-----------+
   |     39    |     GC512B     |    Y    |      N     | this RFC  |
   +-----------+----------------+---------+------------+-----------+
   |     40    |     GC512C     |    Y    |      N     | this RFC  |
   +-----------+----------------+---------+------------+-----------+
                                Table 6

   IANA has added numbers 67, 68 with the names gost_sign256,
   gost_sign512 to the "ClientCertificateType Identifiers" registry, as
   shown below.


   +-----------+---------------------+---------+----------+
   |   Value   |      Description    | DTLS-OK | Reference|
   +-----------+---------------------+---------+----------+
   |     67    |     gost_sign256    |    Y    | this RFC |
   +-----------+---------------------+---------+----------+
   |     68    |     gost_sign512    |    Y    | this RFC |
   +-----------+---------------------+---------+----------+
                            Table 7


10.  Historical considerations

   Note that prior to the existence of this document implementations
   could use only the values from the Private Use space in order to use
   the GOST-based algorithms.  So some old implementations can still use
   the old value {0x00, 0x81} instead of the {0xC1, 0x02} value to
   indicate the TLS_GOSTR341112_256_WITH_28147_CNT_IMIT cipher suite;
   one old value 0xEE instead of the values 64, 8 and 67 (to indicate
   the gostr34102012_256 signature algorithm, the Intrinsic hash
   algorithm and the gost_sign256 certificate type respectively); one
   old value 0xEF instead of the values 65, 8 and 68 (to indicate the
   gostr34102012_512 signature algorithm, the Intrinsic hash algorithm
   and the gost_sign512 certificate type respectively).




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   Due to historical reasons in addition to the curve identifier values
   listed in Table 2 there exist some extra identifier values that
   correspond to the curves GC256B, GC256C and GC256D as follows.


   +-------------+-----------------------------------------+
   | Description |        Curve Identifier Values          |
   +-------------+-----------------------------------------+
   |   GC256B    |id-GostR3410_2001-CryptoPro-XchA-ParamSet|
   |             |id-tc26-gost-3410-2012-256-paramSetB     |
   +-------------+-----------------------------------------+
   |   GC256C    |id-tc26-gost-3410-2012-256-paramSetC     |
   +-------------+-----------------------------------------+
   |   GC256D    |id-GostR3410-2001-CryptoPro-XchB-ParamSet|
   |             |id-tc26-gost-3410-2012-256-paramSetD     |
   +-------------+-----------------------------------------+
                            Table 8


   Client should be prepared to handle any of them correctly if
   corresponding group is included in the supported_groups extension
   (see [RFC8422] and [RFC7919]).

11.  Security Considerations

   This entire document is about security considerations.

12.  References

12.1.  Normative References

   [RFC2119]  Bradner, S., "Key words for use in RFCs to Indicate
              Requirement Levels", BCP 14, RFC 2119,
              DOI 10.17487/RFC2119, March 1997,
              <https://www.rfc-editor.org/info/rfc2119>.

   [RFC4357]  Popov, V., Kurepkin, I., and S. Leontiev, "Additional
              Cryptographic Algorithms for Use with GOST 28147-89, GOST
              R 34.10-94, GOST R 34.10-2001, and GOST R 34.11-94
              Algorithms", RFC 4357, DOI 10.17487/RFC4357, January 2006,
              <https://www.rfc-editor.org/info/rfc4357>.

   [RFC4490]  Leontiev, S., Ed. and G. Chudov, Ed., "Using the GOST
              28147-89, GOST R 34.11-94, GOST R 34.10-94, and GOST R
              34.10-2001 Algorithms with Cryptographic Message Syntax
              (CMS)", RFC 4490, DOI 10.17487/RFC4490, May 2006,
              <https://www.rfc-editor.org/info/rfc4490>.




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   [RFC5246]  Dierks, T. and E. Rescorla, "The Transport Layer Security
              (TLS) Protocol Version 1.2", RFC 5246,
              DOI 10.17487/RFC5246, August 2008,
              <https://www.rfc-editor.org/info/rfc5246>.

   [RFC5746]  Rescorla, E., Ray, M., Dispensa, S., and N. Oskov,
              "Transport Layer Security (TLS) Renegotiation Indication
              Extension", RFC 5746, DOI 10.17487/RFC5746, February 2010,
              <https://www.rfc-editor.org/info/rfc5746>.

   [RFC5830]  Dolmatov, V., Ed., "GOST 28147-89: Encryption, Decryption,
              and Message Authentication Code (MAC) Algorithms",
              RFC 5830, DOI 10.17487/RFC5830, March 2010,
              <https://www.rfc-editor.org/info/rfc5830>.

   [RFC6986]  Dolmatov, V., Ed. and A. Degtyarev, "GOST R 34.11-2012:
              Hash Function", RFC 6986, DOI 10.17487/RFC6986, August
              2013, <https://www.rfc-editor.org/info/rfc6986>.

   [RFC7091]  Dolmatov, V., Ed. and A. Degtyarev, "GOST R 34.10-2012:
              Digital Signature Algorithm", RFC 7091,
              DOI 10.17487/RFC7091, December 2013,
              <https://www.rfc-editor.org/info/rfc7091>.

   [RFC7366]  Gutmann, P., "Encrypt-then-MAC for Transport Layer
              Security (TLS) and Datagram Transport Layer Security
              (DTLS)", RFC 7366, DOI 10.17487/RFC7366, September 2014,
              <https://www.rfc-editor.org/info/rfc7366>.

   [RFC7627]  Bhargavan, K., Ed., Delignat-Lavaud, A., Pironti, A.,
              Langley, A., and M. Ray, "Transport Layer Security (TLS)
              Session Hash and Extended Master Secret Extension",
              RFC 7627, DOI 10.17487/RFC7627, September 2015,
              <https://www.rfc-editor.org/info/rfc7627>.

   [RFC7801]  Dolmatov, V., Ed., "GOST R 34.12-2015: Block Cipher
              "Kuznyechik"", RFC 7801, DOI 10.17487/RFC7801, March 2016,
              <https://www.rfc-editor.org/info/rfc7801>.

   [RFC7836]  Smyshlyaev, S., Ed., Alekseev, E., Oshkin, I., Popov, V.,
              Leontiev, S., Podobaev, V., and D. Belyavsky, "Guidelines
              on the Cryptographic Algorithms to Accompany the Usage of
              Standards GOST R 34.10-2012 and GOST R 34.11-2012",
              RFC 7836, DOI 10.17487/RFC7836, March 2016,
              <https://www.rfc-editor.org/info/rfc7836>.






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   [RFC7919]  Gillmor, D., "Negotiated Finite Field Diffie-Hellman
              Ephemeral Parameters for Transport Layer Security (TLS)",
              RFC 7919, DOI 10.17487/RFC7919, August 2016,
              <https://www.rfc-editor.org/info/rfc7919>.

   [RFC8174]  Leiba, B., "Ambiguity of Uppercase vs Lowercase in RFC
              2119 Key Words", BCP 14, RFC 8174, DOI 10.17487/RFC8174,
              May 2017, <https://www.rfc-editor.org/info/rfc8174>.

   [RFC8422]  Nir, Y., Josefsson, S., and M. Pegourie-Gonnard, "Elliptic
              Curve Cryptography (ECC) Cipher Suites for Transport Layer
              Security (TLS) Versions 1.2 and Earlier", RFC 8422,
              DOI 10.17487/RFC8422, August 2018,
              <https://www.rfc-editor.org/info/rfc8422>.

   [RFC8446]  Rescorla, E., "The Transport Layer Security (TLS) Protocol
              Version 1.3", RFC 8446, DOI 10.17487/RFC8446, August 2018,
              <https://www.rfc-editor.org/info/rfc8446>.

   [RFC8645]  Smyshlyaev, S., Ed., "Re-keying Mechanisms for Symmetric
              Keys", RFC 8645, DOI 10.17487/RFC8645, August 2019,
              <https://www.rfc-editor.org/info/rfc8645>.

12.2.  Informative References

   [CMAC]     Dworkin, M., "Recommendation for Block Cipher Modes of
              Operation: the CMAC Mode for Authentication", NIST Special
              Publication 800-38B, 2005.

   [DraftGostTLS13]
              Smyshlyaev, S., Alekseev, E., Griboedova, E., and A.
              Babueva, "GOST Cipher Suites for Transport Layer Security
              (TLS) Protocol Version 1.3", 2020,
              <https://tools.ietf.org/html/draft-smyshlyaev-tls13-gost-
              suites-03>.

   [GOST28147-89]
              Government Committee of the USSR for Standards,
              "Cryptographic Protection for Data Processing System,
              Gosudarstvennyi Standard of USSR (In Russian)",
              GOST 28147-89, 1989.

   [GOST3410-2012]
              Federal Agency on Technical Regulating and Metrology,
              "Information technology. Cryptographic data security.
              Signature and verification processes of [electronic]
              digital signature", GOST R 34.10-2012, 2012.




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   [GOST3411-2012]
              Federal Agency on Technical Regulating and Metrology,
              "Information technology. Cryptographic Data Security.
              Hashing function", GOST R 34.11-2012, 2012.

   [GOST3412-2015]
              Federal Agency on Technical Regulating and Metrology,
              "Information technology. Cryptographic data security.
              Block ciphers", GOST R 34.12-2015, 2015.

   [GOST3413-2015]
              Federal Agency on Technical Regulating and Metrology,
              "Information technology. Cryptographic data security.
              Modes of operation for block ciphers", GOST R 34.13-2015,
              2015.

   [IK2003]   Iwata T., Kurosawa K. (2003), "OMAC: One-Key CBC MAC.",
              FSE 2003. Lecture Notes in Computer Science,  vol 2887.
              Springer, Berlin, Heidelberg, 2003.

   [MODES]    Dworkin, M., "Recommendation for Block Cipher Modes of
              Operation: Methods and Techniques", NIST Special
              Publication  800-38A, December 2001.

Appendix A.  Test Examples

A.1.  Test Examples for CTR_OMAC cipher suites

A.1.1.  TLSTREE Examples

A.1.1.1.  TLS_GOSTR341112_256_WITH_MAGMA_CTR_OMAC ciphersuite


          TLS_GOSTR341112_256_WITH_MAGMA_CTR_OMAC
       ***********************************************
       Root Key K_root:
       00 11 22 33 44 55 66 77 88 99 AA BB CC EE FF 0A
       11 22 33 44 55 66 77 88 99 AA BB CC EE FF 0A 00

       seqnum = 0
       First level key from Divers_1:
       F3 55 89 F0 9B F8 01 B1 CA 11 42 73 B9 5F D6 C1
       39 2E 78 F9 FB 81 4D A0 5A 7C CA 08 9E C8 65 42

       Second level key from Divers_2:
       51 37 D5 C4 A6 E6 BE 42 C4 40 D1 0A 95 EE A0 7F
       08 9E 74 0D 38 90 EB 52 65 2C 0C B9 3F 20 7B B4




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       The resulting key from Divers 3:
       19 A7 6E D3 0F 4D 6D 1F 5B 72 63 EC 49 1A D8 38
       17 C0 B5 7D 8A 03 56 12 71 40 FB 4F 74 25 49 4D

       seqnum = 4095
       First level key from Divers_1:
       F3 55 89 F0 9B F8 01 B1 CA 11 42 73 B9 5F D6 C1
       39 2E 78 F9 FB 81 4D A0 5A 7C CA 08 9E C8 65 42

       Second level key from Divers_2:
       51 37 D5 C4 A6 E6 BE 42 C4 40 D1 0A 95 EE A0 7F
       08 9E 74 0D 38 90 EB 52 65 2C 0C B9 3F 20 7B B4

       The resulting key from Divers 3:
       19 A7 6E D3 0F 4D 6D 1F 5B 72 63 EC 49 1A D8 38
       17 C0 B5 7D 8A 03 56 12 71 40 FB 4F 74 25 49 4D

       seqnum = 4096
       First level key from Divers_1:
       F3 55 89 F0 9B F8 01 B1 CA 11 42 73 B9 5F D6 C1
       39 2E 78 F9 FB 81 4D A0 5A 7C CA 08 9E C8 65 42

       Second level key from Divers_2:
       51 37 D5 C4 A6 E6 BE 42 C4 40 D1 0A 95 EE A0 7F
       08 9E 74 0D 38 90 EB 52 65 2C 0C B9 3F 20 7B B4

       The resulting key from Divers 3:
       FB 30 EE 53 CF CF 89 D7 48 FC 0C 72 EF 16 0B 8B
       53 CB BB FD 03 12 82 B0 26 21 4A B2 E0 77 58 FF

       seqnum = 33554431
       First level key from Divers_1:
       F3 55 89 F0 9B F8 01 B1 CA 11 42 73 B9 5F D6 C1
       39 2E 78 F9 FB 81 4D A0 5A 7C CA 08 9E C8 65 42

       Second level key from Divers_2:
       51 37 D5 C4 A6 E6 BE 42 C4 40 D1 0A 95 EE A0 7F
       08 9E 74 0D 38 90 EB 52 65 2C 0C B9 3F 20 7B B4

       The resulting key from Divers 3:
       B8 5B 36 DC 22 82 32 6B C0 35 C5 72 DC 93 F1 8D
       83 AA 01 74 F3 94 20 9A 51 3B B3 74 DC 09 35 AE

       seqnum = 33554432
       First level key from Divers_1:
       F3 55 89 F0 9B F8 01 B1 CA 11 42 73 B9 5F D6 C1
       39 2E 78 F9 FB 81 4D A0 5A 7C CA 08 9E C8 65 42




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       Second level key from Divers_2:
       3F EA 59 38 DA 2B F8 DD C4 7E C1 DC 55 61 89 66
       79 02 BE 42 0D F4 C3 7D AF 21 75 3B CB 1D C7 F3

       The resulting key from Divers 3:
       0F D7 C0 9E FD F8 E8 15 73 EE CC F8 6E 4B 95 E3
       AF 7F 34 DA B1 17 7C FD 7D B9 7B 6D A9 06 40 8A

       seqnum = 274877906943
       First level key from Divers_1:
       F3 55 89 F0 9B F8 01 B1 CA 11 42 73 B9 5F D6 C1
       39 2E 78 F9 FB 81 4D A0 5A 7C CA 08 9E C8 65 42

       Second level key from Divers_2:
       AB F3 A5 37 98 3A 1B 98 40 06 6D E6 8A 49 BF 25
       97 7E E5 C3 F5 2D 33 3E 3C 22 0F 1D 15 C5 08 93

       The resulting key from Divers 3:
       48 0F 99 72 BA F2 5D 4C 36 9A 96 AF 91 BC A4 55
       3F 79 D8 F0 C5 61 8B 19 FD 44 CF DC 57 FA 37 33

       seqnum = 274877906944
       First level key from Divers_1:
       15 60 0D 9E 8F A6 85 54 CF 15 2D C7 4F BC 42 51
       17 B0 3E 09 76 BB 28 EA 98 24 C3 B7 0F 28 CB D8

       Second level key from Divers_2:
       6C C2 8E B0 93 24 72 12 5C 7A D3 F8 09 73 B3 C8
       C4 13 7D A5 73 BC 17 1A 24 ED D4 A3 71 F1 F8 73

       The resulting key from Divers 3:
       25 28 C1 C6 A8 F0 92 7B F2 BE 27 BB 78 D2 7F 21
       46 D6 55 93 B0 C7 17 3A 06 CB 9D 88 DF 92 32 65



A.1.1.2.  TLS_GOSTR341112_256_WITH_KUZNYECHIK_CTR_OMAC ciphersuite


          TLS_GOSTR341112_256_WITH_KUZNYECHIK_CTR_OMAC
         ***********************************************
         Root Key K_root:
         00 11 22 33 44 55 66 77 88 99 AA BB CC EE FF 0A
         11 22 33 44 55 66 77 88 99 AA BB CC EE FF 0A 00

         seqnum = 0
         First level key from Divers_1:
         F3 55 89 F0 9B F8 01 B1 CA 11 42 73 B9 5F D6 C1



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         39 2E 78 F9 FB 81 4D A0 5A 7C CA 08 9E C8 65 42

         Second level key from Divers_2:
         51 37 D5 C4 A6 E6 BE 42 C4 40 D1 0A 95 EE A0 7F
         08 9E 74 0D 38 90 EB 52 65 2C 0C B9 3F 20 7B B4

         The resulting key from Divers 3:
         19 A7 6E D3 0F 4D 6D 1F 5B 72 63 EC 49 1A D8 38
         17 C0 B5 7D 8A 03 56 12 71 40 FB 4F 74 25 49 4D

         seqnum = 63
         First level key from Divers_1:
         F3 55 89 F0 9B F8 01 B1 CA 11 42 73 B9 5F D6 C1
         39 2E 78 F9 FB 81 4D A0 5A 7C CA 08 9E C8 65 42

         Second level key from Divers_2:
         51 37 D5 C4 A6 E6 BE 42 C4 40 D1 0A 95 EE A0 7F
         08 9E 74 0D 38 90 EB 52 65 2C 0C B9 3F 20 7B B4

         The resulting key from Divers 3:
         19 A7 6E D3 0F 4D 6D 1F 5B 72 63 EC 49 1A D8 38
         17 C0 B5 7D 8A 03 56 12 71 40 FB 4F 74 25 49 4D

         seqnum = 64
         First level key from Divers_1:
         F3 55 89 F0 9B F8 01 B1 CA 11 42 73 B9 5F D6 C1
         39 2E 78 F9 FB 81 4D A0 5A 7C CA 08 9E C8 65 42

         Second level key from Divers_2:
         51 37 D5 C4 A6 E6 BE 42 C4 40 D1 0A 95 EE A0 7F
         08 9E 74 0D 38 90 EB 52 65 2C 0C B9 3F 20 7B B4

         The resulting key from Divers 3:
         AE BE 1E F4 18 71 3B F0 44 B9 FC D9 E5 72 D4 37
         FB 38 B5 D8 29 56 7A 6F 79 18 39 6D 9F 4E 09 6B

         seqnum = 524287
         First level key from Divers_1:
         F3 55 89 F0 9B F8 01 B1 CA 11 42 73 B9 5F D6 C1
         39 2E 78 F9 FB 81 4D A0 5A 7C CA 08 9E C8 65 42

         Second level key from Divers_2:
         51 37 D5 C4 A6 E6 BE 42 C4 40 D1 0A 95 EE A0 7F
         08 9E 74 0D 38 90 EB 52 65 2C 0C B9 3F 20 7B B4

         The resulting key from Divers 3:
         6F 18 D4 00 3E A2 CB 30 F5 FE C1 93 A2 34 F0 7D
         7C 43 94 98 7F 50 75 8D E2 2B 22 0D 8A 10 51 06



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         seqnum = 524288
         First level key from Divers_1:
         F3 55 89 F0 9B F8 01 B1 CA 11 42 73 B9 5F D6 C1
         39 2E 78 F9 FB 81 4D A0 5A 7C CA 08 9E C8 65 42

         Second level key from Divers_2:
         F6 59 EB 85 EE BD 2A 8D CC 1B B3 F7 C6 00 57 FF
         6D 33 B6 0F 74 65 DD 42 B5 11 2C F3 A6 B1 AB 66

         The resulting key from Divers 3:
         E5 4B 16 41 5B 3B 66 3E 78 0B 06 2D 24 F7 36 C4
         49 54 63 C3 A8 91 E1 FA 46 F7 AE 99 FF F9 F3 78

         seqnum = 4294967295
         First level key from Divers_1:
         F3 55 89 F0 9B F8 01 B1 CA 11 42 73 B9 5F D6 C1
         39 2E 78 F9 FB 81 4D A0 5A 7C CA 08 9E C8 65 42

         Second level key from Divers_2:
         F4 BC 10 1A BB 68 86 2A 8C E3 1E A0 0D DF A7 FE
         B8 29 10 F1 24 F4 B1 E2 9E A8 3B E0 06 C2 26 8D

         The resulting key from Divers 3:
         CF 60 09 04 C7 1E 7B 88 A4 9A C8 E2 45 77 4B 3D
         BE ED FB 81 DE 9A 0E 2F 4E 46 C3 56 07 BC 2F 04

         seqnum = 4294967296
         First level key from Divers_1:
         55 CC 95 E0 D1 FB 54 85 AF 8E F6 9A CD 72 B2 32
         79 7C D2 E8 5D 86 CD FD 1D E5 5B D1 FA 14 37 78

         Second level key from Divers_2:
         72 16 91 E1 01 C4 28 96 A6 40 AE 18 3F BB 44 5B
         76 37 9C 57 E1 FD 8A 7D 49 A6 23 E4 23 8C 0E 1D

         The resulting key from Divers 3:
         16 18 0B 24 64 54 00 B8 36 14 38 37 D8 6A AC 93
         95 2A E3 EB 82 44 D5 EC 2A B0 2C FF 30 78 11 38



A.1.2.  Record Examples

A.1.2.1.  TLS_GOSTR341112_256_WITH_MAGMA_CTR_OMAC ciphersuite


   TLS_GOSTR341112_256_WITH_MAGMA_CTR_OMAC
   ********************************************************



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   It is assumed that during Handshake following keys were established:

   - MAC key:
   00000:   00 11 22 33 44 55 66 77 88 99 AA BB CC EE FF 0A
   00010:   11 22 33 44 55 66 77 88 99 AA BB CC EE FF 0A 00
   - Encryption key:
   00000:   22 33 44 55 66 77 88 99 AA BB CC EE FF 0A 00 11
   00010:   33 44 55 66 77 88 99 AA BB CC EE FF 0A 00 11 22
   - IV:
   00000:   00 00 00 00
   ---------------------------------------------------------
   seqnum = 0

   Application data:
   00000:   00 00 00 00 00 00 00

   TLSPlaintext:
   00000:   17 03 03 00 07 00 00 00 00 00 00 00

   K_MAC_0:
   00000:   19 A7 6E D3 0F 4D 6D 1F 5B 72 63 EC 49 1A D8 38
   00010:   17 C0 B5 7D 8A 03 56 12 71 40 FB 4F 74 25 49 4D

   MAC value:
   00000:   F3 3E B6 89 6F EC E2 86

   K_ENC_0:
   00000:   58 AF BE 9A 4C 31 98 AA AB AA 26 92 C4 19 F1 79
   00010:   7C 9B 92 DE B3 CC 74 46 B3 63 57 71 13 F0 FB 56

   IV_0:
   00000:   00 00 00 00

   TLSCiphertext:
   00000:   17 03 03 00 0F 9B 42 0D A8 6F AF 36 7F 05 14 43
   00010:   CE 9C 10 72
   ---------------------------------------------------------
   seqnum = 4095

   Application data:
   00000:   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
   00010:   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
   00020:   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
   . . .
   003D0:   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
   003E0:   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
   003F0:   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00




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   TLSPlaintext:
   00000:   17 03 03 04 00 00 00 00 00 00 00 00 00 00 00 00
   00010:   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
   00020:   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
   . . .
   003D0:   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
   003E0:   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
   003F0:   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
   00400:   00 00 00 00 00

   K_MAC_4095:
   00000:   19 A7 6E D3 0F 4D 6D 1F 5B 72 63 EC 49 1A D8 38
   00010:   17 C0 B5 7D 8A 03 56 12 71 40 FB 4F 74 25 49 4D

   MAC value:
   00000:   58 D3 BB 60 8F BC 98 B8

   K_ENC_4095:
   00000:   58 AF BE 9A 4C 31 98 AA AB AA 26 92 C4 19 F1 79
   00010:   7C 9B 92 DE B3 CC 74 46 B3 63 57 71 13 F0 FB 56

   IV_4095:
   00000:   00 00 0F FF

   TLSCiphertext:
   00000:   17 03 03 04 08 B7 11 43 8B 16 20 1F 3C 49 33 95
   00010:   21 C9 C8 CA 75 66 D4 C2 0F D3 3E 58 1F 80 07 DC
   00020:   76 04 3E 2B 35 C8 E8 4B B2 55 08 27 66 13 59 6F
   . . .
   003D0:   E7 77 70 BF 45 17 E1 F8 DD 1B 2C 05 64 AD 68 FC
   003E0:   4A 88 9A 48 B8 B1 FF 0E A4 E1 BB 70 4D 56 A4 75
   003F0:   2F 51 A5 82 CC 54 1A 80 8F 8C 8B 62 97 68 88 C8
   00400:   10 59 DE 41 27 63 A3 E0 99 9A CD DA 77

   ---------------------------------------------------------
   seqnum = 4096

   Application data:
   00000:   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
   00010:   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
   00020:   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
   . . .
   007D0:   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
   007E0:   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
   007F0:   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

   TLSPlaintext:
   00000:   17 03 03 08 00 00 00 00 00 00 00 00 00 00 00 00



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   00010:   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
   00020:   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
   . . .
   007D0:   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
   007E0:   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
   007F0:   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
   00800:   00 00 00 00 00

   K_MAC_4096:
   00000:   FB 30 EE 53 CF CF 89 D7 48 FC 0C 72 EF 16 0B 8B
   00010:   53 CB BB FD 03 12 82 B0 26 21 4A B2 E0 77 58 FF

   MAC value:
   00000:   50 55 A2 6A BE 19 63 81

   K_ENC_4096:
   00000:   ED F2 FD 02 47 71 60 23 83 09 00 2D 1D 57 DF 9F
   00010:   D2 ED 18 D6 45 66 C7 6F 4B F0 3D 3A BF 7B BB 1E

   IV_4096:
   00000:   00 00 10 00

   TLSCiphertext:
   00000:   17 03 03 08 08 99 95 26 07 03 47 1D ED A2 E6 55
   00010:   B6 B3 93 83 5E 33 8B 1E D0 0E DD 22 47 A2 FB 88
   00020:   FB B7 A8 94 80 62 08 8A F3 2C AE B6 AA 2C 4F 2A
   . . .
   007D0:   7F 0B 24 61 E7 5F E1 06 34 B8 4D C5 70 35 72 5A
   007E0:   CA 4F 0C BC A9 B0 6C B9 F7 6F BD 2F 80 46 2B 8D
   007F0:   77 5E BD 41 6F 63 41 39 AC 89 C2 ED 3D F1 9F E2
   00800:   4E F8 C0 5A A8 90 93 1B 01 86 FD 7D DF



A.1.2.2.  TLS_GOSTR341112_256_WITH_KUZNYECHIK_CTR_OMAC ciphersuite


   TLS_GOSTR341112_256_WITH_KUZNYECHIK_CTR_OMAC
   ***********************************************
   It is assumed that during Handshake following keys were established:

   - MAC key:
   00000:   00 11 22 33 44 55 66 77 88 99 AA BB CC EE FF 0A
   00010:   11 22 33 44 55 66 77 88 99 AA BB CC EE FF 0A 00
   - Encryption key:
   00000:   22 33 44 55 66 77 88 99 AA BB CC EE FF 0A 00 11
   00010:   33 44 55 66 77 88 99 AA BB CC EE FF 0A 00 11 22
   - IV:



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   00000:   00 00 00 00 00 00 00 00

   ---------------------------------------------------------
   seqnum = 0

   Application data:
   00000:   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

   TLSPlaintext:
   00000:   17 03 03 00 0F 00 00 00 00 00 00 00 00 00 00 00
   00010:   00 00 00 00

   K_MAC_0:
   00000:   19 A7 6E D3 0F 4D 6D 1F 5B 72 63 EC 49 1A D8 38
   00010:   17 C0 B5 7D 8A 03 56 12 71 40 FB 4F 74 25 49 4D

   MAC value:
   00000:   FD 17 19 DD 95 08 37 EB 7C 7B B8 F5 00 37 99 81

   K_ENC_0:
   00000:   58 AF BE 9A 4C 31 98 AA AB AA 26 92 C4 19 F1 79
   00010:   7C 9B 92 DE B3 CC 74 46 B3 63 57 71 13 F0 FB 56

   IV_0:
   00000:   00 00 00 00 00 00 00 00

   TLSCiphertext:
   00000:   17 03 03 00 1F 4D 1A 30 52 36 57 3B FF C1 4E 46
   00010:   DC BE 74 6D B6 C9 9A 17 5A 81 C4 71 1E 2F 84 C3
   00020:   92 C5 40 7C

   ---------------------------------------------------------
   seqnum = 63

   Application data:
   00000:   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
   00010:   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
   00020:   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
   . . .
   00FD0:   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
   00FE0:   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
   00FF0:   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

   TLSPlaintext:
   00000:   17 03 03 10 00 00 00 00 00 00 00 00 00 00 00 00
   00010:   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
   00020:   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
   . . .



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   00FD0:   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
   00FE0:   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
   00FF0:   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
   01000:   00 00 00 00 00

   K_MAC_63:
   00000:   19 A7 6E D3 0F 4D 6D 1F 5B 72 63 EC 49 1A D8 38
   00010:   17 C0 B5 7D 8A 03 56 12 71 40 FB 4F 74 25 49 4D

   Mac value:
   00000:   98 46 27 61 D0 26 24 4A 2C 0B 7D 1B CC CB E7 B0

   K_ENC_63:
   00000:   58 AF BE 9A 4C 31 98 AA AB AA 26 92 C4 19 F1 79
   00010:   7C 9B 92 DE B3 CC 74 46 B3 63 57 71 13 F0 FB 56

   IV_63:
   00000:   00 00 00 00 00 00 00 3F

   TLSCiphertext:
   00000:   17 03 03 10 10 12 93 51 D2 6E 14 07 13 A2 1B 37
   00010:   68 24 A2 23 17 CD C0 D8 8E 01 CF A3 FE 21 41 5F
   00020:   5C 5E 05 86 9C CF 38 A5 1B C2 E0 ED 68 94 46 A8
   . . .
   00FE0:   19 AD 99 8C 06 25 21 E6 7B 63 59 A4 F5 C8 16 F9
   00FF0:   47 6B A7 13 26 82 BB A8 CE 0B ED AD 65 E4 20 A2
   01000:   97 B6 E2 C6 1F A4 06 D9 B8 CA 36 FD 9F CD 3A EE
   01010:   24 78 F4 D1 96

   ---------------------------------------------------------
   seqnum = 64

   Application data:
   00000:   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
   00010:   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
   00020:   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
   . . .
   01FD0:   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
   01FE0:   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
   01FF0:   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

   TLSPlaintext:
   00000:   17 03 03 20 00 00 00 00 00 00 00 00 00 00 00 00
   00010:   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
   00020:   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
   . . .
   01FD0:   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
   01FE0:   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00



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   01FF0:   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
   02000:   00 00 00 00 00

   K_MAC_64:
   00000:   AE BE 1E F4 18 71 3B F0 44 B9 FC D9 E5 72 D4 37
   00010:   FB 38 B5 D8 29 56 7A 6F 79 18 39 6D 9F 4E 09 6B

   Mac value:
   00000:   EA C3 97 87 84 2B 1D BD 60 80 CC 3F BF AE 5C 2F

   K_ENC_64:
   00000:   64 F5 5A FC 37 A1 74 D9 53 3E 70 8B CD 14 FA 4A
   00010:   EE C3 7B C0 E3 2B A4 99 01 B4 66 9E 96 A6 3D 96

   IV_64:
   00000:   00 00 00 00 00 00 00 40

   TLSCiphertext:
   00000:   17 03 03 20 10 E6 66 BB 98 AC 5B 0F 39 31 D8 55
   00010:   1B 93 36 85 96 EE F0 EB A8 26 9C B8 BD AA E7 EB
   00020:   80 C8 30 D7 5A B7 D4 6C 25 06 DC 8B 83 E1 F2 D3
   . . .
   01FE0:   B3 02 67 2C CB 02 86 CD 40 48 FB D5 38 1A 65 55
   01FF0:   26 11 25 51 01 4F A8 ED F5 C2 1B 7D 1D B3 9D 6B
   02000:   AD EC 0D 7C 07 05 34 8B 5C 55 6C 4D 50 81 69 1A
   02010:   A9 EC 36 F8 B5



A.1.3.  Handshake Examples

   The ClientHello.extensions and the ServerHello.extensions fields
   contain the extended_master_secret extension (see [RFC7627]) and the
   renegotiation_info extension (see [RFC5746]) in the following
   examples.

A.1.3.1.  TLS_GOSTR341112_256_WITH_MAGMA_CTR_OMAC ciphersuite


   Server certificate curve OID:
   id-GostR3410-2001-CryptoPro-A-ParamSet, "1.2.643.2.2.35.1"


   Server public key Q_s:
   x = 0x6531D4A72E655BFC9DFB94293B260702
         82FABF10D5C49B7366148C60E0BF8167

   y = 0x37F8CC71DC5D917FC4A66F7826E72750



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         8270B4FFC266C26CD4363E77B553A5B8

   Server private key d_s:
   0x5F308355DFD6A8ACAEE0837B100A3B1F
     6D63FB29B78EF27D3967757F0527144C


   ---------------------------Client---------------------------

   ClientHello message:
   msg_type:                01
   length:                  000040
   body:
     client_version:
       major:               03
       minor:               03
     random:                933EA21EC3802A561550EC78D6ED51AC
                            2439D7E749C31BC3A3456165889684CA
     session_id:
       length:              00
       vector:              --
     cipher_suites:
       length:              0004
       vector:
         CipherSuite:       C100
         CipherSuite:       C101
     compression_methods:
       length:              01
       vector:
         CompressionMethod: 00
     extensions:
       length:              0013
       vector:
         Extension: /* signature_algorithms */
           extension_type:  000D
           extension_data:
             length:        0006
             vector:
               supported_signature_algorithms:
                 length:    0004
                 vector:
                   /* 1 pair of algorithms */
                   hash:    08
                   signature:
                            40
                   /* 2 pair of algorithms */
                   hash:    08
                   signature:



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                            41
         Extension: /* renegotiation_info */
           extension_type:  FF01
           extension_data:
             length:        0001
             vector:
               renegotiated_connection:
                 length:    00
                 vector:    --
         Extension: /* extended_master_secret */
           extension_type:  0017
           extension_data:
             length:        0000
             vector:        --

   00000:   01 00 00 40 03 03 93 3E A2 1E C3 80 2A 56 15 50
   00010:   EC 78 D6 ED 51 AC 24 39 D7 E7 49 C3 1B C3 A3 45
   00020:   61 65 88 96 84 CA 00 00 04 C1 00 C1 01 01 00 00
   00030:   13 00 0D 00 06 00 04 08 40 08 41 FF 01 00 01 00
   00040:   00 17 00 00

   Record layer message:
   type:                    16
   version:
     major:                 03
     minor:                 03
   length:                  0044
   fragment:                010000400303933EA21EC3802A561550
                            EC78D6ED51AC2439D7E749C31BC3A345
                            6165889684CA000004C100C101010000
                            13000D0006000408400841FF01000100
                            00170000

   00000:   16 03 03 00 44 01 00 00 40 03 03 93 3E A2 1E C3
   00010:   80 2A 56 15 50 EC 78 D6 ED 51 AC 24 39 D7 E7 49
   00020:   C3 1B C3 A3 45 61 65 88 96 84 CA 00 00 04 C1 00
   00030:   C1 01 01 00 00 13 00 0D 00 06 00 04 08 40 08 41
   00040:   FF 01 00 01 00 00 17 00 00


   ---------------------------Server---------------------------

   ServerHello message:
   msg_type:                02
   length:                  000041
   body:
     server_version:
       major:               03



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       minor:               03
     random:                933EA21E49C31BC3A3456165889684CA
                            A5576CE7924A24F58113808DBD9EF856
     session_id:
       length:              10
       vector:              C3802A561550EC78D6ED51AC2439D7E7
     cipher_suite:
         CipherSuite:       C101
     compression_method:
         CompressionMethod: 00
     extensions:
       length:              0009
       vector:
         Extension: /* renegotiation_info */
           extension_type:  FF01
           extension_data:
             length:        0001
             vector:
               renegotiated_connection:
                 length:    00
                 vector:    --
         Extension: /* extended_master_secret */
           extension_type:  0017
           extension_data:
             length:        0000
             vector:        --

   00000:   02 00 00 41 03 03 93 3E A2 1E 49 C3 1B C3 A3 45
   00010:   61 65 88 96 84 CA A5 57 6C E7 92 4A 24 F5 81 13
   00020:   80 8D BD 9E F8 56 10 C3 80 2A 56 15 50 EC 78 D6
   00030:   ED 51 AC 24 39 D7 E7 C1 01 00 00 09 FF 01 00 01
   00040:   00 00 17 00 00

   Record layer message:
   type:                    16
   version:
     major:                 03
     minor:                 03
   length:                  0045
   fragment:                020000410303933EA21E49C31BC3A345
                            6165889684CAA5576CE7924A24F58113
                            808DBD9EF85610C3802A561550EC78D6
                            ED51AC2439D7E7C101000009FF010001
                            0000170000

   00000:   16 03 03 00 45 02 00 00 41 03 03 93 3E A2 1E 49
   00010:   C3 1B C3 A3 45 61 65 88 96 84 CA A5 57 6C E7 92
   00020:   4A 24 F5 81 13 80 8D BD 9E F8 56 10 C3 80 2A 56



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   00030:   15 50 EC 78 D6 ED 51 AC 24 39 D7 E7 C1 01 00 00
   00040:   09 FF 01 00 01 00 00 17 00 00


   ---------------------------Server---------------------------

   Certificate message:
   msg_type:                0B
   length:                  0001DB
   body:
     certificate_list:
       length:              0001D8
       vector:
         ASN.1Cert:
           length:          0001D5
           vector:          308201D13082017EA003020102020833
                            FBB2C0E9575A46300A06082A85030701
                            010302301F311D301B06035504030C14
                                          . . .
                            797990E4B5452CF82FE1F19EE237B754
                            CBCD5078D752A28013DFFC8224AD114B
                            BD7C1BB71E480AD6EEF9857A8C99C595
                            9053EEDFE9

   00000:   0B 00 01 DB 00 01 D8 00 01 D5 30 82 01 D1 30 82
   00010:   01 7E A0 03 02 01 02 02 08 33 FB B2 C0 E9 57 5A
   00020:   46 30 0A 06 08 2A 85 03 07 01 01 03 02 30 1F 31
   00030:   1D 30 1B 06 03 55 04 03 0C 14 74 65 73 74 5F 73
   00040:   65 6C 66 73 69 67 6E 65 64 5F 63 65 72 74 30 1E
   00050:   17 0D 31 39 30 36 32 37 31 35 32 34 30 38 5A 17
   00060:   0D 32 30 31 32 31 38 31 35 33 34 30 38 5A 30 1F
   00070:   31 1D 30 1B 06 03 55 04 03 0C 14 74 65 73 74 5F
   00080:   73 65 6C 66 73 69 67 6E 65 64 5F 63 65 72 74 30
   00090:   66 30 1F 06 08 2A 85 03 07 01 01 01 01 30 13 06
   000A0:   07 2A 85 03 02 02 23 01 06 08 2A 85 03 07 01 01
   000B0:   02 02 03 43 00 04 40 67 81 BF E0 60 8C 14 66 73
   000C0:   9B C4 D5 10 BF FA 82 02 07 26 3B 29 94 FB 9D FC
   000D0:   5B 65 2E A7 D4 31 65 B8 A5 53 B5 77 3E 36 D4 6C
   000E0:   C2 66 C2 FF B4 70 82 50 27 E7 26 78 6F A6 C4 7F
   000F0:   91 5D DC 71 CC F8 37 A3 81 96 30 81 93 30 1D 06
   00100:   03 55 1D 0E 04 16 04 14 E7 D0 0B B8 4D 8D 24 18
   00110:   29 3E 05 C1 7C E7 77 98 D4 8D 30 16 30 0E 06 03
   00120:   55 1D 0F 01 01 FF 04 04 03 02 01 C6 30 12 06 03
   00130:   55 1D 13 01 01 FF 04 08 30 06 01 01 FF 02 01 01
   00140:   30 4E 06 03 55 1D 23 04 47 30 45 80 14 E7 D0 0B
   00150:   B8 4D 8D 24 18 29 3E 05 C1 7C E7 77 98 D4 8D 30
   00160:   16 A1 23 A4 21 30 1F 31 1D 30 1B 06 03 55 04 03
   00170:   0C 14 74 65 73 74 5F 73 65 6C 66 73 69 67 6E 65



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   00180:   64 5F 63 65 72 74 82 08 33 FB B2 C0 E9 57 5A 46
   00190:   30 0A 06 08 2A 85 03 07 01 01 03 02 03 41 00 E2
   001A0:   88 44 F9 F1 C8 55 E2 DB 5B 19 79 79 90 E4 B5 45
   001B0:   2C F8 2F E1 F1 9E E2 37 B7 54 CB CD 50 78 D7 52
   001C0:   A2 80 13 DF FC 82 24 AD 11 4B BD 7C 1B B7 1E 48
   001D0:   0A D6 EE F9 85 7A 8C 99 C5 95 90 53 EE DF E9

   Record layer message:
   type:                    16
   version:
     major:                 03
     minor:                 03
   length:                  01DF
   fragment:                0B0001DB0001D80001D5308201D13082
                            017EA003020102020833FBB2C0E9575A
                            46300A06082A85030701010302301F31
                                          . . .
                            8844F9F1C855E2DB5B19797990E4B545
                            2CF82FE1F19EE237B754CBCD5078D752
                            A28013DFFC8224AD114BBD7C1BB71E48
                            0AD6EEF9857A8C99C5959053EEDFE9

   00000:   16 03 03 01 DF 0B 00 01 DB 00 01 D8 00 01 D5 30
   00010:   82 01 D1 30 82 01 7E A0 03 02 01 02 02 08 33 FB
   00020:   B2 C0 E9 57 5A 46 30 0A 06 08 2A 85 03 07 01 01
   00030:   03 02 30 1F 31 1D 30 1B 06 03 55 04 03 0C 14 74
   00040:   65 73 74 5F 73 65 6C 66 73 69 67 6E 65 64 5F 63
   00050:   65 72 74 30 1E 17 0D 31 39 30 36 32 37 31 35 32
   00060:   34 30 38 5A 17 0D 32 30 31 32 31 38 31 35 33 34
   00070:   30 38 5A 30 1F 31 1D 30 1B 06 03 55 04 03 0C 14
   00080:   74 65 73 74 5F 73 65 6C 66 73 69 67 6E 65 64 5F
   00090:   63 65 72 74 30 66 30 1F 06 08 2A 85 03 07 01 01
   000A0:   01 01 30 13 06 07 2A 85 03 02 02 23 01 06 08 2A
   000B0:   85 03 07 01 01 02 02 03 43 00 04 40 67 81 BF E0
   000C0:   60 8C 14 66 73 9B C4 D5 10 BF FA 82 02 07 26 3B
   000D0:   29 94 FB 9D FC 5B 65 2E A7 D4 31 65 B8 A5 53 B5
   000E0:   77 3E 36 D4 6C C2 66 C2 FF B4 70 82 50 27 E7 26
   000F0:   78 6F A6 C4 7F 91 5D DC 71 CC F8 37 A3 81 96 30
   00100:   81 93 30 1D 06 03 55 1D 0E 04 16 04 14 E7 D0 0B
   00110:   B8 4D 8D 24 18 29 3E 05 C1 7C E7 77 98 D4 8D 30
   00120:   16 30 0E 06 03 55 1D 0F 01 01 FF 04 04 03 02 01
   00130:   C6 30 12 06 03 55 1D 13 01 01 FF 04 08 30 06 01
   00140:   01 FF 02 01 01 30 4E 06 03 55 1D 23 04 47 30 45
   00150:   80 14 E7 D0 0B B8 4D 8D 24 18 29 3E 05 C1 7C E7
   00160:   77 98 D4 8D 30 16 A1 23 A4 21 30 1F 31 1D 30 1B
   00170:   06 03 55 04 03 0C 14 74 65 73 74 5F 73 65 6C 66
   00180:   73 69 67 6E 65 64 5F 63 65 72 74 82 08 33 FB B2
   00190:   C0 E9 57 5A 46 30 0A 06 08 2A 85 03 07 01 01 03



Smyshlyaev, et al.      Expires December 7, 2021               [Page 48]


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   001A0:   02 03 41 00 E2 88 44 F9 F1 C8 55 E2 DB 5B 19 79
   001B0:   79 90 E4 B5 45 2C F8 2F E1 F1 9E E2 37 B7 54 CB
   001C0:   CD 50 78 D7 52 A2 80 13 DF FC 82 24 AD 11 4B BD
   001D0:   7C 1B B7 1E 48 0A D6 EE F9 85 7A 8C 99 C5 95 90
   001E0:   53 EE DF E9


   ---------------------------Server---------------------------

   ServerHelloDone message:
   msg_type:                0E
   length:                  000000
   body:                    --

   00000:   0E 00 00 00

   Record layer message::
   type:                    16
   version:
     major:                 03
     minor:                 03
   length:                  0004
   fragment:                0E000000

   00000:   16 03 03 00 04 0E 00 00 00


   ---------------------------Client---------------------------

   PMS:
   00000:   A5 57 6C E7 92 4A 24 F5 81 13 80 8D BD 9E F8 56
   00010:   F5 BD C3 B1 83 CE 5D AD CA 36 A5 3A A0 77 65 1D

   Random d_eph value:
   0xA5C77C7482373DE16CE4A6F73CCE7F78
     471493FF2C0709B8B706C9E8A25E6C1E

   Q_eph ephemeral key:
   x = 0xA8F36D63D262A203978F1B3B6795CDBB
         F1AE7FB8EF7F47F1F18871C198E00793

   y = 0x34CA5D6B4485640EA195435993BEB1F8
         B016ED610496B5CC175AC2EA1F14F887

   HASH (r_c | r_s):
   00000:   C3 EF 04 28 D4 B7 A1 F4 C5 02 5F 2E 65 DD 2B 2E
   00010:   A5 83 AE EF DB 67 C7 F4 21 4A 6A 29 8E 99 E3 25




Smyshlyaev, et al.      Expires December 7, 2021               [Page 49]


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   Export key generation. r value:
   0xC3EF0428D4B7A1F4C5025F2E65DD2B2E

   Export key generation. UKM value:
   0xC3EF0428D4B7A1F4C5025F2E65DD2B2E

   seed:
   00000:   A5 83 AE EF DB 67 C7 F4

   K_EXP:
   00000:   1E 58 54 90 E8 65 FF D1 8F 18 D7 C0 A0 4D 0E E8
   00010:   4F 1A 5D 79 7C EF AD A0 1B 1E 3B 7F DB 90 E0 29

   Export keys K_Exp_MAC | K_Exp_ENC used in KExp15 algorithm:
   00000:   2D 8B A8 C8 4C B2 32 FF 41 F1 0C 3A D9 24 13 42
   00010:   23 25 4F 71 E5 69 6D 3D 29 C3 E4 C9 DA A6 B2 93
   00020:   84 9E B6 34 0B FF AE 69 28 A3 C3 E4 FF 92 EC CB
   00030:   1E 8F 0C F7 A1 88 36 8E 6B 74 8E 52 EA 37 8B 0C

   IV:
   00000:   21 4A 6A 29

   PMSEXP:
   00000:   D7 F0 F0 42 23 67 86 7B 25 FA 42 33 A9 54 F5 8B
   00010:   DE 92 E9 C9 BB FB 88 16 C9 9F 15 E6 39 87 22 A0
   00020:   B2 B7 BF E8 49 3E 9A 5C


   ---------------------------Client---------------------------

   ClientKeyExchange message:
   msg_type:                10
   length:                  000095
   body:
     exchange_keys:         3081920428D7F0F0422367867B25FA42
                            33A954F58BDE92E9C9BBFB8816C99F15
                            E6398722A0B2B7BFE8493E9A5C306630
                                          . . .
                            EFB87FAEF1BBCD95673B1B8F9703A262
                            D2636DF3A887F8141FEAC25A17CCB596
                            0461ED16B0F8B1BE93594395A10E6485
                            446B5DCA34

   00000:   10 00 00 95 30 81 92 04 28 D7 F0 F0 42 23 67 86
   00010:   7B 25 FA 42 33 A9 54 F5 8B DE 92 E9 C9 BB FB 88
   00020:   16 C9 9F 15 E6 39 87 22 A0 B2 B7 BF E8 49 3E 9A
   00030:   5C 30 66 30 1F 06 08 2A 85 03 07 01 01 01 01 30
   00040:   13 06 07 2A 85 03 02 02 23 01 06 08 2A 85 03 07



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   00050:   01 01 02 02 03 43 00 04 40 93 07 E0 98 C1 71 88
   00060:   F1 F1 47 7F EF B8 7F AE F1 BB CD 95 67 3B 1B 8F
   00070:   97 03 A2 62 D2 63 6D F3 A8 87 F8 14 1F EA C2 5A
   00080:   17 CC B5 96 04 61 ED 16 B0 F8 B1 BE 93 59 43 95
   00090:   A1 0E 64 85 44 6B 5D CA 34

   Record layer message:
   type:                    16
   version:
     major:                 03
     minor:                 03
   length:                  0099
   fragment:                100000953081920428D7F0F042236786
                            7B25FA4233A954F58BDE92E9C9BBFB88
                            16C99F15E6398722A0B2B7BFE8493E9A
                                          . . .
                            F1F1477FEFB87FAEF1BBCD95673B1B8F
                            9703A262D2636DF3A887F8141FEAC25A
                            17CCB5960461ED16B0F8B1BE93594395
                            A10E6485446B5DCA34

   00000:   16 03 03 00 99 10 00 00 95 30 81 92 04 28 D7 F0
   00010:   F0 42 23 67 86 7B 25 FA 42 33 A9 54 F5 8B DE 92
   00020:   E9 C9 BB FB 88 16 C9 9F 15 E6 39 87 22 A0 B2 B7
   00030:   BF E8 49 3E 9A 5C 30 66 30 1F 06 08 2A 85 03 07
   00040:   01 01 01 01 30 13 06 07 2A 85 03 02 02 23 01 06
   00050:   08 2A 85 03 07 01 01 02 02 03 43 00 04 40 93 07
   00060:   E0 98 C1 71 88 F1 F1 47 7F EF B8 7F AE F1 BB CD
   00070:   95 67 3B 1B 8F 97 03 A2 62 D2 63 6D F3 A8 87 F8
   00080:   14 1F EA C2 5A 17 CC B5 96 04 61 ED 16 B0 F8 B1
   00090:   BE 93 59 43 95 A1 0E 64 85 44 6B 5D CA 34


   ---------------------------Server---------------------------

   PMSEXP extracted:
   00000:   D7 F0 F0 42 23 67 86 7B 25 FA 42 33 A9 54 F5 8B
   00010:   DE 92 E9 C9 BB FB 88 16 C9 9F 15 E6 39 87 22 A0
   00020:   B2 B7 BF E8 49 3E 9A 5C

   HASH(r_c | r_s):
   00000:   C3 EF 04 28 D4 B7 A1 F4 C5 02 5F 2E 65 DD 2B 2E
   00010:   A5 83 AE EF DB 67 C7 F4 21 4A 6A 29 8E 99 E3 25

   Export key generation. r value:
   0xC3EF0428D4B7A1F4C5025F2E65DD2B2E

   Export key generation. UKM value:



Smyshlyaev, et al.      Expires December 7, 2021               [Page 51]


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   0xC3EF0428D4B7A1F4C5025F2E65DD2B2E

   seed:
   00000:   A5 83 AE EF DB 67 C7 F4

   K_EXP:
   00000:   1E 58 54 90 E8 65 FF D1 8F 18 D7 C0 A0 4D 0E E8
   00010:   4F 1A 5D 79 7C EF AD A0 1B 1E 3B 7F DB 90 E0 29

   Import keys K_Imp_MAC | K_Imp_ENC used in KImp15 algorithm:
   00000:   2D 8B A8 C8 4C B2 32 FF 41 F1 0C 3A D9 24 13 42
   00010:   23 25 4F 71 E5 69 6D 3D 29 C3 E4 C9 DA A6 B2 93
   00020:   84 9E B6 34 0B FF AE 69 28 A3 C3 E4 FF 92 EC CB
   00030:   1E 8F 0C F7 A1 88 36 8E 6B 74 8E 52 EA 37 8B 0C

   IV:
   00000:   21 4A 6A 29

   PMS:
   00000:   A5 57 6C E7 92 4A 24 F5 81 13 80 8D BD 9E F8 56
   00010:   F5 BD C3 B1 83 CE 5D AD CA 36 A5 3A A0 77 65 1D


   ---------------------------Client---------------------------

   HASH(HM):
   00000:   7E 1F 59 D3 64 9D B6 09 00 EA 4F 8A 58 5A 65 7A
   00010:   92 77 B3 04 50 58 4C F5 43 51 19 8C DE A3 0C 49

   MS:
   00000:   FD D2 7C B4 04 AD 4E 44 49 68 4F 7C 55 90 E9 E7
   00010:   02 EF 41 01 93 3B 52 77 A4 A9 6D F5 00 B0 7C C3
   00020:   32 4F D8 A6 D9 07 CB B0 3D F3 FB 33 1F 1C 4D 0C

   Client connection key material
   K_write_MAC|K_read_MAC|K_write_ENC|K_read_ENC|IV_write|IV_read:
   00000:   DD 4E 10 17 E3 09 1F FD 86 75 65 8A 78 00 90 09
   00010:   3B BE 69 EC A6 93 31 5C A8 5B E0 A6 14 3D C9 F8
   00020:   1D 64 D0 23 46 5F 8B EA 17 F8 12 F8 C2 D8 BF C0
   00030:   D9 BB AB A7 B4 DF D3 A1 7C E0 E1 3B 2D 63 65 F3
   00040:   FC 8B 34 59 CF 54 FE 44 9A 04 07 64 53 73 08 00
   00050:   75 10 32 55 9D 07 B6 C4 EA C6 75 48 71 BC 97 8A
   00060:   B9 0E 2A EE 98 77 14 BB D8 F7 57 AE F7 84 FF 24
   00070:   47 B3 94 2E B4 3E 26 35 73 1C 4C 28 22 D0 2D 79
   00080:   2B 6A 81 3F 93 ED A6 FA


   ---------------------------Server---------------------------



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   HASH(HM):
   00000:   7E 1F 59 D3 64 9D B6 09 00 EA 4F 8A 58 5A 65 7A
   00010:   92 77 B3 04 50 58 4C F5 43 51 19 8C DE A3 0C 49

   MS:
   00000:   FD D2 7C B4 04 AD 4E 44 49 68 4F 7C 55 90 E9 E7
   00010:   02 EF 41 01 93 3B 52 77 A4 A9 6D F5 00 B0 7C C3
   00020:   32 4F D8 A6 D9 07 CB B0 3D F3 FB 33 1F 1C 4D 0C

   Server connection key material
   K_read_MAC|K_write_MAC|K_read_ENC|K_write_ENC|IV_read|IV_write:
   00000:   DD 4E 10 17 E3 09 1F FD 86 75 65 8A 78 00 90 09
   00010:   3B BE 69 EC A6 93 31 5C A8 5B E0 A6 14 3D C9 F8
   00020:   1D 64 D0 23 46 5F 8B EA 17 F8 12 F8 C2 D8 BF C0
   00030:   D9 BB AB A7 B4 DF D3 A1 7C E0 E1 3B 2D 63 65 F3
   00040:   FC 8B 34 59 CF 54 FE 44 9A 04 07 64 53 73 08 00
   00050:   75 10 32 55 9D 07 B6 C4 EA C6 75 48 71 BC 97 8A
   00060:   B9 0E 2A EE 98 77 14 BB D8 F7 57 AE F7 84 FF 24
   00070:   47 B3 94 2E B4 3E 26 35 73 1C 4C 28 22 D0 2D 79
   00080:   2B 6A 81 3F 93 ED A6 FA


   ---------------------------Client---------------------------

   ChangeCipherSpec message:
   type:                    01

   00000:   01

   Record layer message:
   type:                    14
   version:
     major:                 03
     minor:                 03
   length:                  0001
   fragment:                01

   00000:   14 03 03 00 01 01


   ---------------------------Client---------------------------

   HASH(HM):
   00000:   7E 1F 59 D3 64 9D B6 09 00 EA 4F 8A 58 5A 65 7A
   00010:   92 77 B3 04 50 58 4C F5 43 51 19 8C DE A3 0C 49

   client_verify_data:
   00000:   B4 61 C5 AD 25 EA 1E 62 B3 70 BD 1F 1B CB 16 91



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   00010:   FC CC BA 37 8B BC 13 43 BE 54 B3 8D F5 53 B7 A5


   ---------------------------Client---------------------------

   Finished message:
   msg_type:                14
   length:                  000020
   body:
     verify_data:           B461C5AD25EA1E62B370BD1F1BCB1691
                            FCCCBA378BBC1343BE54B38DF553B7A5

   00000:   14 00 00 20 B4 61 C5 AD 25 EA 1E 62 B3 70 BD 1F
   00010:   1B CB 16 91 FC CC BA 37 8B BC 13 43 BE 54 B3 8D
   00020:   F5 53 B7 A5

   Record layer message:
   type:                    16
   version:
     major:                 03
     minor:                 03
   length:                  002C
   fragment:                0C630271D4DA39DD8D6BD040302D9B8F
                            33D5F7B967EED155F7D65592892C03C7
                            885C249B1225B184AB4D5DBF

   00000:   16 03 03 00 2C 0C 63 02 71 D4 DA 39 DD 8D 6B D0
   00010:   40 30 2D 9B 8F 33 D5 F7 B9 67 EE D1 55 F7 D6 55
   00020:   92 89 2C 03 C7 88 5C 24 9B 12 25 B1 84 AB 4D 5D
   00030:   BF


   ---------------------------Server---------------------------

   ChangeCipherSpec message:
   type:                    01

   00000:   01

   Record layer message:
   type:                    14
   version:
     major:                 03
     minor:                 03
   length:                  0001
   fragment:                01

   00000:   14 03 03 00 01 01



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   ---------------------------Server---------------------------

   HASH(HM):
   00000:   DB D7 D8 93 82 4A ED FD D5 FB 7B 75 4B 47 E1 E6
   00010:   AF E0 77 DA E6 D1 13 63 42 07 C7 EE 0F C6 F3 B1

   server_verify_data:
   00000:   45 39 EC 8D 0A F7 B1 A6 20 41 AB 43 4A 43 77 71
   00010:   D3 4C 47 19 D8 6E BB FD 0F 28 C3 E9 53 55 0C D0


   ---------------------------Server---------------------------

   Finished message:
   msg_type:                14
   length:                  000020
   body:
     verify_data:           4539EC8D0AF7B1A62041AB434A437771
                            D34C4719D86EBBFD0F28C3E953550CD0

   00000:   14 00 00 20 45 39 EC 8D 0A F7 B1 A6 20 41 AB 43
   00010:   4A 43 77 71 D3 4C 47 19 D8 6E BB FD 0F 28 C3 E9
   00020:   53 55 0C D0

   Record layer message:
   type:                    16
   version:
     major:                 03
     minor:                 03
   length:                  002C
   fragment:                E6A94A4BF70886566A2316811E57B483
                            BB1E47950A1FF820A80DCA77A4DF9954
                            2DAB6953F3ED03D95CCA4748

   00000:   16 03 03 00 2C E6 A9 4A 4B F7 08 86 56 6A 23 16
   00010:   81 1E 57 B4 83 BB 1E 47 95 0A 1F F8 20 A8 0D CA
   00020:   77 A4 DF 99 54 2D AB 69 53 F3 ED 03 D9 5C CA 47
   00030:   48


   ---------------------------Client---------------------------

   Application data:
   00000:   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
   00010:   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

   Record layer message:
   type:                    17



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   version:
     major:                 03
     minor:                 03
   length:                  0028
   fragment:                38807B6E5E0C3F4F7E0DBF7758031BF0
                            7F100C4B63ADBC75F49BCBF428572D37
                            7CAED097336DB203

   00000:   17 03 03 00 28 38 80 7B 6E 5E 0C 3F 4F 7E 0D BF
   00010:   77 58 03 1B F0 7F 10 0C 4B 63 AD BC 75 F4 9B CB
   00020:   F4 28 57 2D 37 7C AE D0 97 33 6D B2 03


   ---------------------------Server---------------------------

   Application data:
   00000:   FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
   00010:   FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF

   Record layer message:
   type:                    17
   version:
     major:                 03
     minor:                 03
   length:                  0028
   fragment:                05B869E5C979C3B9D4837B8E39D9BBEE
                            1BBD0052D3D48340D0CDE082B33BC07F
                            4E742D1113249AD8

   00000:   17 03 03 00 28 05 B8 69 E5 C9 79 C3 B9 D4 83 7B
   00010:   8E 39 D9 BB EE 1B BD 00 52 D3 D4 83 40 D0 CD E0
   00020:   82 B3 3B C0 7F 4E 74 2D 11 13 24 9A D8


   ---------------------------Client---------------------------

   close_notify alert:
   Alert:
     level:                 01
     description:           00

   00000:   01 00

   Record layer message:
   type:                    15
   version:
     major:                 03
     minor:                 03



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   length:                  000A
   fragment:                4F2A0807A0374E28C632

   00000:   15 03 03 00 0A 4F 2A 08 07 A0 37 4E 28 C6 32


   ---------------------------Server---------------------------

   close_notify alert:
   Alert:
     level:                 01
     description:           00

   00000:   01 00

   Record layer message:
   type:                    15
   version:
     major:                 03
     minor:                 03
   length:                  000A
   fragment:                999468B49AC5B0DE512C

   00000:   15 03 03 00 0A 99 94 68 B4 9A C5 B0 DE 51 2C





A.1.3.2.  TLS_GOSTR341112_256_WITH_KUZNYECHIK_CTR_OMAC ciphersuite



   Server certificate curve OID:
   id-tc26-gost-3410-2012-512-paramSetC, "1.2.643.7.1.2.1.2.3"

   Server public key Q_s:
   x = 0xF14589DA479AD972C66563669B3FF580
         92E6A30A288BF447CD9FF6C3133E9724
         7A9706B267703C9B4E239F0D7C7E3310
         C22D2752B35BD2E4FD39B8F11DEB833A

   y = 0xF305E95B36502D4E60A1059FB20AB30B
         FC7C95727F3A2C04B1DFDDB53B0413F2
         99F2DFE66A5E1CCB4101A7A01D612BE6
         BD78E1E3B3D567EBB16ABE587A11F4EA

   Server private key d_s:



Smyshlyaev, et al.      Expires December 7, 2021               [Page 57]


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   0x12FD7A70067479A0F66C59F9A25534AD
     FBC7ABFD3CC72D79806F8B402601644B
     3005ED365A2D8989A8CCAE640D5FC08D
     D27DFBBFE137CF528E1AC6D445192E01

   Client certificate curve OID:
   id-tc26-gost-3410-2012-256-paramSetA, "1.2.643.7.1.2.1.1.1"

   Client public key Q_c:
   x = 0x0F5DB18A9E15F324B778676025BFD7B5
         DF066566EABAA1C51CD879F87B0B4975

   y = 0x9EE5BBF18361F842D3F087DEC2943939
         E0FA2BFB4EDEC25A8D10ABB22C48F386

   Client private key d_c:
   0x0918AD3F7D209ABF89F1E8505DA894CE
     E10DA09D32E72E815D9C0ADA30B5A103


   ---------------------------Client---------------------------

   ClientHello message:
   msg_type:                01
   length:                  000040
   body:
     client_version:
       major:               03
       minor:               03
     random:                933EA21EC3802A561550EC78D6ED51AC
                            2439D7E749C31BC3A3456165889684CA
     session_id:
       length:              00
       vector:              --
     cipher_suites:
       length:              0004
       vector:
         CipherSuite:       C100
         CipherSuite:       C101
     compression_methods:
       length:              01
       vector:
         CompressionMethod: 00
     extensions:
       length:              0013
       vector:
         Extension: /* signature_algorithms */
           extension_type:  000D



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           extension_data:
             length:        0006
             vector:
               supported_signature_algorithms:
                 length:    0004
                 vector:
                   /* 1 pair of algorithms */
                   hash:    08
                   signature:
                            40
                   /* 2 pair of algorithms */
                   hash:    08
                   signature:
                            41
         Extension: /* renegotiation_info */
           extension_type:  FF01
           extension_data:
             length:        0001
             vector:
               renegotiated_connection:
                 length:    00
                 vector:    --
         Extension: /* extended_master_secret */
           extension_type:  0017
           extension_data:
             length:        0000
             vector:        --

   00000:   01 00 00 40 03 03 93 3E A2 1E C3 80 2A 56 15 50
   00010:   EC 78 D6 ED 51 AC 24 39 D7 E7 49 C3 1B C3 A3 45
   00020:   61 65 88 96 84 CA 00 00 04 C1 00 C1 01 01 00 00
   00030:   13 00 0D 00 06 00 04 08 40 08 41 FF 01 00 01 00
   00040:   00 17 00 00

   Record layer message:
   type:                    16
   version:
     major:                 03
     minor:                 03
   length:                  0044
   fragment:                010000400303933EA21EC3802A561550
                            EC78D6ED51AC2439D7E749C31BC3A345
                            6165889684CA000004C100C101010000
                            13000D0006000408400841FF01000100
                            00170000

   00000:   16 03 03 00 44 01 00 00 40 03 03 93 3E A2 1E C3
   00010:   80 2A 56 15 50 EC 78 D6 ED 51 AC 24 39 D7 E7 49



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   00020:   C3 1B C3 A3 45 61 65 88 96 84 CA 00 00 04 C1 00
   00030:   C1 01 01 00 00 13 00 0D 00 06 00 04 08 40 08 41
   00040:   FF 01 00 01 00 00 17 00 00


   ---------------------------Server---------------------------

   ServerHello message:
   msg_type:                02
   length:                  000041
   body:
     server_version:
       major:               03
       minor:               03
     random:                933EA21E49C31BC3A3456165889684CA
                            A5576CE7924A24F58113808DBD9EF856
     session_id:
       length:              10
       vector:              C3802A561550EC78D6ED51AC2439D7E7
     cipher_suite:
         CipherSuite:       C100
     compression_method:
         CompressionMethod: 00
     extensions:
       length:              0009
       vector:
         Extension: /* renegotiation_info */
           extension_type:  FF01
           extension_data:
             length:        0001
             vector:
               renegotiated_connection:
                 length:    00
                 vector:    --
         Extension: /* extended_master_secret */
           extension_type:  0017
           extension_data:
             length:        0000
             vector:        --

   00000:   02 00 00 41 03 03 93 3E A2 1E 49 C3 1B C3 A3 45
   00010:   61 65 88 96 84 CA A5 57 6C E7 92 4A 24 F5 81 13
   00020:   80 8D BD 9E F8 56 10 C3 80 2A 56 15 50 EC 78 D6
   00030:   ED 51 AC 24 39 D7 E7 C1 00 00 00 09 FF 01 00 01
   00040:   00 00 17 00 00

   Record layer message:
   type:                    16



Smyshlyaev, et al.      Expires December 7, 2021               [Page 60]


Internet-Draft       GOST Cipher Suites for TLS 1.2            June 2021


   version:
     major:                 03
     minor:                 03
   length:                  0045
   fragment:                020000410303933EA21E49C31BC3A345
                            6165889684CAA5576CE7924A24F58113
                            808DBD9EF85610C3802A561550EC78D6
                            ED51AC2439D7E7C100000009FF010001
                            0000170000

   00000:   16 03 03 00 45 02 00 00 41 03 03 93 3E A2 1E 49
   00010:   C3 1B C3 A3 45 61 65 88 96 84 CA A5 57 6C E7 92
   00020:   4A 24 F5 81 13 80 8D BD 9E F8 56 10 C3 80 2A 56
   00030:   15 50 EC 78 D6 ED 51 AC 24 39 D7 E7 C1 00 00 00
   00040:   09 FF 01 00 01 00 00 17 00 00


   ---------------------------Server---------------------------

   Certificate message:
   msg_type:                0B
   length:                  00024C
   body:
     certificate_list:
       length:              000249
       vector:
         ASN.1Cert:
           length:          000246
           vector:          30820242308201AEA003020102020101
                            300A06082A850307010103033042312C
                            302A06092A864886F70D010901161D74
                                          . . .
                            371AF83C5BC58B366DFEFA7345D50317
                            867C177AC84AC07EE8612164629AB7BD
                            C48AA0F64A741FE7298E82C5BFCE8672
                            029F875391F7

   00000:   0B 00 02 4C 00 02 49 00 02 46 30 82 02 42 30 82
   00010:   01 AE A0 03 02 01 02 02 01 01 30 0A 06 08 2A 85
   00020:   03 07 01 01 03 03 30 42 31 2C 30 2A 06 09 2A 86
   00030:   48 86 F7 0D 01 09 01 16 1D 74 6C 73 31 32 5F 73
   00040:   65 72 76 65 72 35 31 32 43 40 63 72 79 70 74 6F
   00050:   70 72 6F 2E 72 75 31 12 30 10 06 03 55 04 03 13
   00060:   09 53 65 72 76 65 72 35 31 32 30 1E 17 0D 31 37
   00070:   30 35 32 35 30 39 32 35 31 38 5A 17 0D 33 30 30
   00080:   35 30 31 30 39 32 35 31 38 5A 30 42 31 2C 30 2A
   00090:   06 09 2A 86 48 86 F7 0D 01 09 01 16 1D 74 6C 73
   000A0:   31 32 5F 73 65 72 76 65 72 35 31 32 43 40 63 72



Smyshlyaev, et al.      Expires December 7, 2021               [Page 61]


Internet-Draft       GOST Cipher Suites for TLS 1.2            June 2021


   000B0:   79 70 74 6F 70 72 6F 2E 72 75 31 12 30 10 06 03
   000C0:   55 04 03 13 09 53 65 72 76 65 72 35 31 32 30 81
   000D0:   AA 30 21 06 08 2A 85 03 07 01 01 01 02 30 15 06
   000E0:   09 2A 85 03 07 01 02 01 02 03 06 08 2A 85 03 07
   000F0:   01 01 02 03 03 81 84 00 04 81 80 3A 83 EB 1D F1
   00100:   B8 39 FD E4 D2 5B B3 52 27 2D C2 10 33 7E 7C 0D
   00110:   9F 23 4E 9B 3C 70 67 B2 06 97 7A 24 97 3E 13 C3
   00120:   F6 9F CD 47 F4 8B 28 0A A3 E6 92 80 F5 3F 9B 66
   00130:   63 65 C6 72 D9 9A 47 DA 89 45 F1 EA F4 11 7A 58
   00140:   BE 6A B1 EB 67 D5 B3 E3 E1 78 BD E6 2B 61 1D A0
   00150:   A7 01 41 CB 1C 5E 6A E6 DF F2 99 F2 13 04 3B B5
   00160:   DD DF B1 04 2C 3A 7F 72 95 7C FC 0B B3 0A B2 9F
   00170:   05 A1 60 4E 2D 50 36 5B E9 05 F3 A3 43 30 41 30
   00180:   1D 06 03 55 1D 0E 04 16 04 14 87 9C C6 5A 0F 4A
   00190:   89 CB 4A 58 49 DF 05 61 56 9B AA DC 11 69 30 0B
   001A0:   06 03 55 1D 0F 04 04 03 02 03 28 30 13 06 03 55
   001B0:   1D 25 04 0C 30 0A 06 08 2B 06 01 05 05 07 03 01
   001C0:   30 0A 06 08 2A 85 03 07 01 01 03 03 03 81 81 00
   001D0:   35 BE 38 51 EC B6 E9 2D 32 40 01 81 0F 8C 89 03
   001E0:   52 42 F4 05 46 9F 4C 4E CB 05 02 7C 57 E2 71 52
   001F0:   12 AF D7 CD BB 0C ED 7A 8B 4D 33 42 CC 50 1A BD
   00200:   99 99 75 A5 8A DE 0E 58 4F CA 35 F5 2E 45 58 B7
   00210:   31 1D 49 D0 A0 51 32 79 F7 39 37 1A F8 3C 5B C5
   00220:   8B 36 6D FE FA 73 45 D5 03 17 86 7C 17 7A C8 4A
   00230:   C0 7E E8 61 21 64 62 9A B7 BD C4 8A A0 F6 4A 74
   00240:   1F E7 29 8E 82 C5 BF CE 86 72 02 9F 87 53 91 F7

   Record layer message:
   type:                    16
   version:
     major:                 03
     minor:                 03
   length:                  0250
   fragment:                0B00024C000249000246308202423082
                            01AEA003020102020101300A06082A85
                            0307010103033042312C302A06092A86
                                          . . .
                            8B366DFEFA7345D50317867C177AC84A
                            C07EE8612164629AB7BDC48AA0F64A74
                            1FE7298E82C5BFCE8672029F875391F7

   00000:   16 03 03 02 50 0B 00 02 4C 00 02 49 00 02 46 30
   00010:   82 02 42 30 82 01 AE A0 03 02 01 02 02 01 01 30
   00020:   0A 06 08 2A 85 03 07 01 01 03 03 30 42 31 2C 30
   00030:   2A 06 09 2A 86 48 86 F7 0D 01 09 01 16 1D 74 6C
   00040:   73 31 32 5F 73 65 72 76 65 72 35 31 32 43 40 63
   00050:   72 79 70 74 6F 70 72 6F 2E 72 75 31 12 30 10 06
   00060:   03 55 04 03 13 09 53 65 72 76 65 72 35 31 32 30



Smyshlyaev, et al.      Expires December 7, 2021               [Page 62]


Internet-Draft       GOST Cipher Suites for TLS 1.2            June 2021


   00070:   1E 17 0D 31 37 30 35 32 35 30 39 32 35 31 38 5A
   00080:   17 0D 33 30 30 35 30 31 30 39 32 35 31 38 5A 30
   00090:   42 31 2C 30 2A 06 09 2A 86 48 86 F7 0D 01 09 01
   000A0:   16 1D 74 6C 73 31 32 5F 73 65 72 76 65 72 35 31
   000B0:   32 43 40 63 72 79 70 74 6F 70 72 6F 2E 72 75 31
   000C0:   12 30 10 06 03 55 04 03 13 09 53 65 72 76 65 72
   000D0:   35 31 32 30 81 AA 30 21 06 08 2A 85 03 07 01 01
   000E0:   01 02 30 15 06 09 2A 85 03 07 01 02 01 02 03 06
   000F0:   08 2A 85 03 07 01 01 02 03 03 81 84 00 04 81 80
   00100:   3A 83 EB 1D F1 B8 39 FD E4 D2 5B B3 52 27 2D C2
   00110:   10 33 7E 7C 0D 9F 23 4E 9B 3C 70 67 B2 06 97 7A
   00120:   24 97 3E 13 C3 F6 9F CD 47 F4 8B 28 0A A3 E6 92
   00130:   80 F5 3F 9B 66 63 65 C6 72 D9 9A 47 DA 89 45 F1
   00140:   EA F4 11 7A 58 BE 6A B1 EB 67 D5 B3 E3 E1 78 BD
   00150:   E6 2B 61 1D A0 A7 01 41 CB 1C 5E 6A E6 DF F2 99
   00160:   F2 13 04 3B B5 DD DF B1 04 2C 3A 7F 72 95 7C FC
   00170:   0B B3 0A B2 9F 05 A1 60 4E 2D 50 36 5B E9 05 F3
   00180:   A3 43 30 41 30 1D 06 03 55 1D 0E 04 16 04 14 87
   00190:   9C C6 5A 0F 4A 89 CB 4A 58 49 DF 05 61 56 9B AA
   001A0:   DC 11 69 30 0B 06 03 55 1D 0F 04 04 03 02 03 28
   001B0:   30 13 06 03 55 1D 25 04 0C 30 0A 06 08 2B 06 01
   001C0:   05 05 07 03 01 30 0A 06 08 2A 85 03 07 01 01 03
   001D0:   03 03 81 81 00 35 BE 38 51 EC B6 E9 2D 32 40 01
   001E0:   81 0F 8C 89 03 52 42 F4 05 46 9F 4C 4E CB 05 02
   001F0:   7C 57 E2 71 52 12 AF D7 CD BB 0C ED 7A 8B 4D 33
   00200:   42 CC 50 1A BD 99 99 75 A5 8A DE 0E 58 4F CA 35
   00210:   F5 2E 45 58 B7 31 1D 49 D0 A0 51 32 79 F7 39 37
   00220:   1A F8 3C 5B C5 8B 36 6D FE FA 73 45 D5 03 17 86
   00230:   7C 17 7A C8 4A C0 7E E8 61 21 64 62 9A B7 BD C4
   00240:   8A A0 F6 4A 74 1F E7 29 8E 82 C5 BF CE 86 72 02
   00250:   9F 87 53 91 F7


   ---------------------------Server---------------------------

   CertificateRequest message:
   msg_type:                0D
   length:                  00000B
   body:
     certificate_types:
       length:              02
       vector:
         /* gost_sign256 */
                            43
         /* gost_sign512 */
                            44
     supported_signature_algorithms:
       length:              0004



Smyshlyaev, et al.      Expires December 7, 2021               [Page 63]


Internet-Draft       GOST Cipher Suites for TLS 1.2            June 2021


       vector:
         /* 1 pair of algorithms */
         hash:              08
         signature:         40
         /* 2 pair of algorithms */
         hash:              08
         signature:         41
     certificate_authorities:
       length:              0000
       vector:              --

   00000:   0D 00 00 0B 02 43 44 00 04 08 40 08 41 00 00

   Record layer message:
   type:                    16
   version:
     major:                 03
     minor:                 03
   length:                  000F
   fragment:                0D00000B0243440004084008410000

   00000:   16 03 03 00 0F 0D 00 00 0B 02 43 44 00 04 08 40
   00010:   08 41 00 00


   ---------------------------Server---------------------------

   ServerHelloDone message:
   msg_type:                0E
   length:                  000000
   body:                    --

   00000:   0E 00 00 00

   Record layer message:
   type:                    16
   version:
     major:                 03
     minor:                 03
   length:                  0004
   fragment:                0E000000

   00000:   16 03 03 00 04 0E 00 00 00


   ---------------------------Client---------------------------

   Certificate message:



Smyshlyaev, et al.      Expires December 7, 2021               [Page 64]


Internet-Draft       GOST Cipher Suites for TLS 1.2            June 2021


   msg_type:                0B
   length:                  0001EA
   body:
     certificate_list:
       length:              0001E7
       vector:
         ASN.1Cert:
           length:          0001E4
           vector:          308201E03082018DA003020102020101
                            300A06082A850307010103023053312E
                            302C06092A864886F70D010901161F74
                                          . . .
                            C1CAB43AC01AFB0F3451BDC2DB188BBC
                            B77884251CDF6037BA830F4B31D5E96F
                            DC9BC1C95ABE658266C48402E070DE1F
                            292724E8

   00000:   0B 00 01 EA 00 01 E7 00 01 E4 30 82 01 E0 30 82
   00010:   01 8D A0 03 02 01 02 02 01 01 30 0A 06 08 2A 85
   00020:   03 07 01 01 03 02 30 53 31 2E 30 2C 06 09 2A 86
   00030:   48 86 F7 0D 01 09 01 16 1F 74 6C 73 31 32 5F 63
   00040:   6C 69 65 6E 74 32 35 36 41 5F 45 40 63 72 79 70
   00050:   74 6F 70 72 6F 2E 72 75 31 21 30 1F 06 03 55 04
   00060:   03 1E 18 00 43 00 6C 00 69 00 65 00 6E 00 74 00
   00070:   32 00 35 00 36 00 41 00 5F 00 45 30 1E 17 0D 31
   00080:   37 30 35 32 35 30 39 33 31 31 38 5A 17 0D 33 30
   00090:   30 35 30 31 30 39 33 31 31 38 5A 30 53 31 2E 30
   000A0:   2C 06 09 2A 86 48 86 F7 0D 01 09 01 16 1F 74 6C
   000B0:   73 31 32 5F 63 6C 69 65 6E 74 32 35 36 41 5F 45
   000C0:   40 63 72 79 70 74 6F 70 72 6F 2E 72 75 31 21 30
   000D0:   1F 06 03 55 04 03 1E 18 00 43 00 6C 00 69 00 65
   000E0:   00 6E 00 74 00 32 00 35 00 36 00 41 00 5F 00 45
   000F0:   30 68 30 21 06 08 2A 85 03 07 01 01 01 01 30 15
   00100:   06 09 2A 85 03 07 01 02 01 01 01 06 08 2A 85 03
   00110:   07 01 01 02 02 03 43 00 04 40 75 49 0B 7B F8 79
   00120:   D8 1C C5 A1 BA EA 66 65 06 DF B5 D7 BF 25 60 67
   00130:   78 B7 24 F3 15 9E 8A B1 5D 0F 86 F3 48 2C B2 AB
   00140:   10 8D 5A C2 DE 4E FB 2B FA E0 39 39 94 C2 DE 87
   00150:   F0 D3 42 F8 61 83 F1 BB E5 9E A3 43 30 41 30 1D
   00160:   06 03 55 1D 0E 04 16 04 14 74 49 1E 77 30 D3 42
   00170:   A6 28 0E 72 A1 13 9D D9 90 8B FA F1 03 30 0B 06
   00180:   03 55 1D 0F 04 04 03 02 07 80 30 13 06 03 55 1D
   00190:   25 04 0C 30 0A 06 08 2B 06 01 05 05 07 03 02 30
   001A0:   0A 06 08 2A 85 03 07 01 01 03 02 03 41 00 1C 2D
   001B0:   35 22 B4 11 02 D6 20 1F 23 50 C1 CA B4 3A C0 1A
   001C0:   FB 0F 34 51 BD C2 DB 18 8B BC B7 78 84 25 1C DF
   001D0:   60 37 BA 83 0F 4B 31 D5 E9 6F DC 9B C1 C9 5A BE
   001E0:   65 82 66 C4 84 02 E0 70 DE 1F 29 27 24 E8



Smyshlyaev, et al.      Expires December 7, 2021               [Page 65]


Internet-Draft       GOST Cipher Suites for TLS 1.2            June 2021


   Record layer message:
   type:                    16
   version:
     major:                 03
     minor:                 03
   length:                  01EE
   fragment:                0B0001EA0001E70001E4308201E03082
                            018DA003020102020101300A06082A85
                            0307010103023053312E302C06092A86
                                          . . .
                            3522B41102D6201F2350C1CAB43AC01A
                            FB0F3451BDC2DB188BBCB77884251CDF
                            6037BA830F4B31D5E96FDC9BC1C95ABE
                            658266C48402E070DE1F292724E8

   00000:   16 03 03 01 EE 0B 00 01 EA 00 01 E7 00 01 E4 30
   00010:   82 01 E0 30 82 01 8D A0 03 02 01 02 02 01 01 30
   00020:   0A 06 08 2A 85 03 07 01 01 03 02 30 53 31 2E 30
   00030:   2C 06 09 2A 86 48 86 F7 0D 01 09 01 16 1F 74 6C
   00040:   73 31 32 5F 63 6C 69 65 6E 74 32 35 36 41 5F 45
   00050:   40 63 72 79 70 74 6F 70 72 6F 2E 72 75 31 21 30
   00060:   1F 06 03 55 04 03 1E 18 00 43 00 6C 00 69 00 65
   00070:   00 6E 00 74 00 32 00 35 00 36 00 41 00 5F 00 45
   00080:   30 1E 17 0D 31 37 30 35 32 35 30 39 33 31 31 38
   00090:   5A 17 0D 33 30 30 35 30 31 30 39 33 31 31 38 5A
   000A0:   30 53 31 2E 30 2C 06 09 2A 86 48 86 F7 0D 01 09
   000B0:   01 16 1F 74 6C 73 31 32 5F 63 6C 69 65 6E 74 32
   000C0:   35 36 41 5F 45 40 63 72 79 70 74 6F 70 72 6F 2E
   000D0:   72 75 31 21 30 1F 06 03 55 04 03 1E 18 00 43 00
   000E0:   6C 00 69 00 65 00 6E 00 74 00 32 00 35 00 36 00
   000F0:   41 00 5F 00 45 30 68 30 21 06 08 2A 85 03 07 01
   00100:   01 01 01 30 15 06 09 2A 85 03 07 01 02 01 01 01
   00110:   06 08 2A 85 03 07 01 01 02 02 03 43 00 04 40 75
   00120:   49 0B 7B F8 79 D8 1C C5 A1 BA EA 66 65 06 DF B5
   00130:   D7 BF 25 60 67 78 B7 24 F3 15 9E 8A B1 5D 0F 86
   00140:   F3 48 2C B2 AB 10 8D 5A C2 DE 4E FB 2B FA E0 39
   00150:   39 94 C2 DE 87 F0 D3 42 F8 61 83 F1 BB E5 9E A3
   00160:   43 30 41 30 1D 06 03 55 1D 0E 04 16 04 14 74 49
   00170:   1E 77 30 D3 42 A6 28 0E 72 A1 13 9D D9 90 8B FA
   00180:   F1 03 30 0B 06 03 55 1D 0F 04 04 03 02 07 80 30
   00190:   13 06 03 55 1D 25 04 0C 30 0A 06 08 2B 06 01 05
   001A0:   05 07 03 02 30 0A 06 08 2A 85 03 07 01 01 03 02
   001B0:   03 41 00 1C 2D 35 22 B4 11 02 D6 20 1F 23 50 C1
   001C0:   CA B4 3A C0 1A FB 0F 34 51 BD C2 DB 18 8B BC B7
   001D0:   78 84 25 1C DF 60 37 BA 83 0F 4B 31 D5 E9 6F DC
   001E0:   9B C1 C9 5A BE 65 82 66 C4 84 02 E0 70 DE 1F 29
   001F0:   27 24 E8




Smyshlyaev, et al.      Expires December 7, 2021               [Page 66]


Internet-Draft       GOST Cipher Suites for TLS 1.2            June 2021


   ---------------------------Client---------------------------

   PMS value:
   00000:   A5 57 6C E7 92 4A 24 F5 81 13 80 8D BD 9E F8 56
   00010:   F5 BD C3 B1 83 CE 5D AD CA 36 A5 3A A0 77 65 1D

   Random d_eph value:
   0x150ACD11B66DD695AD18418FA7A2DC63
     6B7E29DCA24536AABC826EE3175BB1FA
     DC3AA0D01D3092E120B0FCF7EB872F4B
     7E26EA17849D689222A48CF95A6E4831

   Q_eph ephemeral key:
   x = 0xC941BE5193189B476D5A0334114A3E04
         BBE5B37C738AE40F150B334135288664
         FEBFC5622818894A07B1F7AD60E28480
         B4B637B90EA7D4BA980186B605D75BC6

   y = 0xA154F7B93E8148652011F4FD52C9A06A
         6471ADB28D0A949AE26BC786DE874153
         ABC00B35164F3214A8A83C00ECE27831
         B093528456234EFE766224FC2A7E9ABE

   HASH (r_c | r_s):
   00000:   C3 EF 04 28 D4 B7 A1 F4 C5 02 5F 2E 65 DD 2B 2E
   00010:   A5 83 AE EF DB 67 C7 F4 21 4A 6A 29 8E 99 E3 25

   Export key generation. r value:
   0xC3EF0428D4B7A1F4C5025F2E65DD2B2E

   Export key generation. UKM value:
   0xC3EF0428D4B7A1F4C5025F2E65DD2B2E

   Export keys K_Exp_MAC | K_Exp_ENC used in KExp15 algorithm:
   00000:   7D AC 56 E4 8A 4D C1 70 FA A8 FC BA E2 0D B8 45
   00010:   45 0C CC C4 C6 32 8B DC 8D 01 15 7C EF A2 A5 F1
   00020:   1F 1C BA D8 86 61 66 F0 1F FA AB 01 52 E2 4B F4
   00030:   60 9D 5F 46 A5 C8 99 C7 87 90 0D 08 B9 FC AD 24

   IV:
   00000:   21 4A 6A 29 8E 99 E3 25

   PMSEXP:
   00000:   25 0D 1B 67 A2 70 AB 04 D3 F6 54 18 E1 D3 80 B4
   00010:   CB 94 5F 0A 3D CA 51 50 0C F3 A1 BE F3 7F 76 C0
   00020:   73 41 A9 83 9C CF 6C BA 71 89 DA 61 EB 67 17 6C





Smyshlyaev, et al.      Expires December 7, 2021               [Page 67]


Internet-Draft       GOST Cipher Suites for TLS 1.2            June 2021


   ---------------------------Client---------------------------

   ClientKeyExchange message:
   msg_type:                10
   length:                  0000E2
   body:
     exchange_keys:         3081DF0430250D1B67A270AB04D3F654
                            18E1D380B4CB945F0A3DCA51500CF3A1
                            BEF37F76C07341A9839CCF6CBA7189DA
                                          . . .
                            93B03178E2EC003CA8A814324F16350B
                            C0AB534187DE86C76BE29A940A8DB2AD
                            71646AA0C952FDF411206548813EB9F7
                            54A1

   00000:   10 00 00 E2 30 81 DF 04 30 25 0D 1B 67 A2 70 AB
   00010:   04 D3 F6 54 18 E1 D3 80 B4 CB 94 5F 0A 3D CA 51
   00020:   50 0C F3 A1 BE F3 7F 76 C0 73 41 A9 83 9C CF 6C
   00030:   BA 71 89 DA 61 EB 67 17 6C 30 81 AA 30 21 06 08
   00040:   2A 85 03 07 01 01 01 02 30 15 06 09 2A 85 03 07
   00050:   01 02 01 02 03 06 08 2A 85 03 07 01 01 02 03 03
   00060:   81 84 00 04 81 80 C6 5B D7 05 B6 86 01 98 BA D4
   00070:   A7 0E B9 37 B6 B4 80 84 E2 60 AD F7 B1 07 4A 89
   00080:   18 28 62 C5 BF FE 64 86 28 35 41 33 0B 15 0F E4
   00090:   8A 73 7C B3 E5 BB 04 3E 4A 11 34 03 5A 6D 47 9B
   000A0:   18 93 51 BE 41 C9 BE 9A 7E 2A FC 24 62 76 FE 4E
   000B0:   23 56 84 52 93 B0 31 78 E2 EC 00 3C A8 A8 14 32
   000C0:   4F 16 35 0B C0 AB 53 41 87 DE 86 C7 6B E2 9A 94
   000D0:   0A 8D B2 AD 71 64 6A A0 C9 52 FD F4 11 20 65 48
   000E0:   81 3E B9 F7 54 A1

   Record layer message:
   type:                    16
   version:
     major:                 03
     minor:                 03
   length:                  00E6
   fragment:                100000E23081DF0430250D1B67A270AB
                            04D3F65418E1D380B4CB945F0A3DCA51
                            500CF3A1BEF37F76C07341A9839CCF6C
                                          . . .
                            2356845293B03178E2EC003CA8A81432
                            4F16350BC0AB534187DE86C76BE29A94
                            0A8DB2AD71646AA0C952FDF411206548
                            813EB9F754A1


   00000:   16 03 03 00 E6 10 00 00 E2 30 81 DF 04 30 25 0D



Smyshlyaev, et al.      Expires December 7, 2021               [Page 68]


Internet-Draft       GOST Cipher Suites for TLS 1.2            June 2021


   00010:   1B 67 A2 70 AB 04 D3 F6 54 18 E1 D3 80 B4 CB 94
   00020:   5F 0A 3D CA 51 50 0C F3 A1 BE F3 7F 76 C0 73 41
   00030:   A9 83 9C CF 6C BA 71 89 DA 61 EB 67 17 6C 30 81
   00040:   AA 30 21 06 08 2A 85 03 07 01 01 01 02 30 15 06
   00050:   09 2A 85 03 07 01 02 01 02 03 06 08 2A 85 03 07
   00060:   01 01 02 03 03 81 84 00 04 81 80 C6 5B D7 05 B6
   00070:   86 01 98 BA D4 A7 0E B9 37 B6 B4 80 84 E2 60 AD
   00080:   F7 B1 07 4A 89 18 28 62 C5 BF FE 64 86 28 35 41
   00090:   33 0B 15 0F E4 8A 73 7C B3 E5 BB 04 3E 4A 11 34
   000A0:   03 5A 6D 47 9B 18 93 51 BE 41 C9 BE 9A 7E 2A FC
   000B0:   24 62 76 FE 4E 23 56 84 52 93 B0 31 78 E2 EC 00
   000C0:   3C A8 A8 14 32 4F 16 35 0B C0 AB 53 41 87 DE 86
   000D0:   C7 6B E2 9A 94 0A 8D B2 AD 71 64 6A A0 C9 52 FD
   000E0:   F4 11 20 65 48 81 3E B9 F7 54 A1


   ---------------------------Server---------------------------

   PMSEXP extracted:
   00000:   25 0D 1B 67 A2 70 AB 04 D3 F6 54 18 E1 D3 80 B4
   00010:   CB 94 5F 0A 3D CA 51 50 0C F3 A1 BE F3 7F 76 C0
   00020:   73 41 A9 83 9C CF 6C BA 71 89 DA 61 EB 67 17 6C

   HASH(r_c | r_s):
   00000:   C3 EF 04 28 D4 B7 A1 F4 C5 02 5F 2E 65 DD 2B 2E
   00010:   A5 83 AE EF DB 67 C7 F4 21 4A 6A 29 8E 99 E3 25

   Export key generation. r value:
   0xC3EF0428D4B7A1F4C5025F2E65DD2B2E

   Export key generation. UKM value:
   0xC3EF0428D4B7A1F4C5025F2E65DD2B2E

   Export keys K_Exp_MAC | K_Exp_ENC used in KImp15 algorithm:
   00000:   7D AC 56 E4 8A 4D C1 70 FA A8 FC BA E2 0D B8 45
   00010:   45 0C CC C4 C6 32 8B DC 8D 01 15 7C EF A2 A5 F1
   00020:   1F 1C BA D8 86 61 66 F0 1F FA AB 01 52 E2 4B F4
   00030:   60 9D 5F 46 A5 C8 99 C7 87 90 0D 08 B9 FC AD 24

   IV:
   00000:   21 4A 6A 29 8E 99 E3 25

   PMS:
   00000:   A5 57 6C E7 92 4A 24 F5 81 13 80 8D BD 9E F8 56
   00010:   F5 BD C3 B1 83 CE 5D AD CA 36 A5 3A A0 77 65 1D


   ---------------------------Client---------------------------



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   Random value k used in signature generation:
   0x163962EEA268203E7C6B3F70BF8D4A36
     34CE6E2CFC424687951D70ACE0B4292A

   Signature value sgn_c = SIGN_d_c(HM):
   00000:   F7 1F 43 62 45 5B C5 5B A8 9A 8F AF 01 82 88 EC
   00010:   00 B3 27 17 48 2E 76 24 B2 57 D9 79 7C 8F F6 02
   00020:   E3 15 FD BD 8D E5 6D 08 54 18 04 0E 1B 61 BB F6
   00030:   B3 01 AC 26 3D 50 03 8B 30 31 13 DB 36 17 50 3A


   ---------------------------Client---------------------------

   CertificateVerify message:
   msg_type:                0F
   length:                  000044
   body:
     algorithm:
       hash:                08
       signature:           40
     signature:
       length:              0040
       vector:              F71F4362455BC55BA89A8FAF018288EC
                            00B32717482E7624B257D9797C8FF602
                            E315FDBD8DE56D085418040E1B61BBF6
                            B301AC263D50038B303113DB3617503A

   00000:   0F 00 00 44 08 40 00 40 F7 1F 43 62 45 5B C5 5B
   00010:   A8 9A 8F AF 01 82 88 EC 00 B3 27 17 48 2E 76 24
   00020:   B2 57 D9 79 7C 8F F6 02 E3 15 FD BD 8D E5 6D 08
   00030:   54 18 04 0E 1B 61 BB F6 B3 01 AC 26 3D 50 03 8B
   00040:   30 31 13 DB 36 17 50 3A

   Record layer message:
   type:                    16
   version:
     major:                 03
     minor:                 03
   length:                  0048
   fragment:                0F00004408400040F71F4362455BC55B
                            A89A8FAF018288EC00B32717482E7624
                            B257D9797C8FF602E315FDBD8DE56D08
                            5418040E1B61BBF6B301AC263D50038B
                            303113DB3617503A

   00000:   16 03 03 00 48 0F 00 00 44 08 40 00 40 F7 1F 43
   00010:   62 45 5B C5 5B A8 9A 8F AF 01 82 88 EC 00 B3 27
   00020:   17 48 2E 76 24 B2 57 D9 79 7C 8F F6 02 E3 15 FD



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   00030:   BD 8D E5 6D 08 54 18 04 0E 1B 61 BB F6 B3 01 AC
   00040:   26 3D 50 03 8B 30 31 13 DB 36 17 50 3A


   ---------------------------Client---------------------------

   HASH(HM):
   00000:   9D 64 0D D8 B2 54 6B 87 05 CC 3E 67 F3 BB 83 2F
   00010:   89 2A 5B D5 D4 5C A0 44 85 01 14 C2 E6 56 02 69

   MS:
   00000:   E3 18 17 B0 EC 7F 3B C9 4A 8B C4 5F 89 12 DE C5
   00010:   71 2A 7A 34 78 56 31 C0 4B AE 81 43 EE 17 90 B4
   00020:   C9 D3 68 0F 6C 9D E1 70 74 58 C8 75 62 4D B6 ED

   Client connection key material
   K_write_MAC|K_read_MAC|K_write_ENC|K_read_ENC|IV_write|IV_read:
   00000:   50 52 5D 33 4E F7 00 6C 1D ED B8 B8 08 EA 03 CC
   00010:   CF 1F CB 3D 33 65 F9 72 E1 7C 7C 31 4E DD 97 90
   00020:   6C 74 35 22 0A A1 B0 C6 DE 6A 1B 0F AC 29 B6 17
   00030:   9E B3 23 86 62 25 E0 7F 30 4C A1 D1 27 75 86 29
   00040:   7B 97 20 5D 7A 08 C2 CD 7F 60 3C 09 46 75 E6 C4
   00050:   CC 15 F2 84 0D 9A EC 63 F0 2A FF 51 DB D5 74 D2
   00060:   76 6C 77 2B 83 2F CE 58 CB 4D E5 49 88 77 A6 7A
   00070:   A4 51 40 B2 ED 52 6E 61 65 0A 28 1B 32 56 35 BC
   00080:   CB 8E F9 4C 5B DF 5B 9F 47 48 B9 5B F1 B0 E0 BF


   ---------------------------Server---------------------------

   HASH(HM):
   00000:   9D 64 0D D8 B2 54 6B 87 05 CC 3E 67 F3 BB 83 2F
   00010:   89 2A 5B D5 D4 5C A0 44 85 01 14 C2 E6 56 02 69

   MS:
   00000:   E3 18 17 B0 EC 7F 3B C9 4A 8B C4 5F 89 12 DE C5
   00010:   71 2A 7A 34 78 56 31 C0 4B AE 81 43 EE 17 90 B4
   00020:   C9 D3 68 0F 6C 9D E1 70 74 58 C8 75 62 4D B6 ED

   Server connection key material
   K_read_MAC|K_write_MAC|K_read_ENC|K_write_ENC|IV_read|IV_write:
   00000:   50 52 5D 33 4E F7 00 6C 1D ED B8 B8 08 EA 03 CC
   00010:   CF 1F CB 3D 33 65 F9 72 E1 7C 7C 31 4E DD 97 90
   00020:   6C 74 35 22 0A A1 B0 C6 DE 6A 1B 0F AC 29 B6 17
   00030:   9E B3 23 86 62 25 E0 7F 30 4C A1 D1 27 75 86 29
   00040:   7B 97 20 5D 7A 08 C2 CD 7F 60 3C 09 46 75 E6 C4
   00050:   CC 15 F2 84 0D 9A EC 63 F0 2A FF 51 DB D5 74 D2
   00060:   76 6C 77 2B 83 2F CE 58 CB 4D E5 49 88 77 A6 7A



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   00070:   A4 51 40 B2 ED 52 6E 61 65 0A 28 1B 32 56 35 BC
   00080:   CB 8E F9 4C 5B DF 5B 9F 47 48 B9 5B F1 B0 E0 BF


   ---------------------------Client---------------------------

   ChangeCipherSpec message:
   type:                    01

   00000:   01

   Record layer message:
   type:                    14
   version:
     major:                 03
     minor:                 03
   length:                  0001
   fragment:                01

   00000:   14 03 03 00 01 01


   ---------------------------Client---------------------------

   HASH(HM):
   00000:   C9 A4 80 DA 29 6C DD 12 3E 9A EB 26 88 8B 86 19
   00010:   EA 67 78 B7 23 FA A8 B2 DC 70 6A CB A5 AB AF 11

   client_verify_data:
   00000:   98 7C 13 E6 FA 16 F3 D5 10 AE 83 00 23 58 72 27
   00010:   32 90 09 4C 8F C7 B5 F0 C7 D7 47 C4 27 35 F8 F1


   ---------------------------Client---------------------------

   Finished message:
   msg_type:                14
   length:                  000020
   body:
     verify_data:           987C13E6FA16F3D510AE830023587227
                            3290094C8FC7B5F0C7D747C42735F8F1

   00000:   14 00 00 20 98 7C 13 E6 FA 16 F3 D5 10 AE 83 00
   00010:   23 58 72 27 32 90 09 4C 8F C7 B5 F0 C7 D7 47 C4
   00020:   27 35 F8 F1

   Record layer message:
   type:                    16



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   version:
     major:                 03
     minor:                 03
   length:                  0034
   fragment:                4DC53D655EDFD1843AF69ADBDE989C0B
                            1F0C0A1A0FD1B3F458029D8F9989FBF9
                            6C5C42971063A9B70714F412E4F6280F
                            7C21601B

   00000:   16 03 03 00 34 4D C5 3D 65 5E DF D1 84 3A F6 9A
   00010:   DB DE 98 9C 0B 1F 0C 0A 1A 0F D1 B3 F4 58 02 9D
   00020:   8F 99 89 FB F9 6C 5C 42 97 10 63 A9 B7 07 14 F4
   00030:   12 E4 F6 28 0F 7C 21 60 1B


   ---------------------------Server---------------------------

   ChangeCipherSpec message:
   type:                    01

   00000:   01

   Record layer message:
   type:                    14
   version:
     major:                 03
     minor:                 03
   length:                  0001
   fragment:                01

   00000:   14 03 03 00 01 01


   ---------------------------Server---------------------------

   HASH(HM):
   00000:   4A 41 4C AD 20 F8 46 D8 F5 D1 05 26 10 A5 9D ED
   00010:   6D 2B 1B B2 A8 9E 13 51 01 FC 9E 49 ED A8 0F B4

   server_verify_data:
   00000:   1E 93 7D A4 77 EE 1F 23 0A 41 D6 E9 D4 14 46 B7
   00010:   F2 1C A1 B2 E2 32 4A 55 2D 52 B3 25 5E B4 3D DF


   ---------------------------Server---------------------------

   Finished message:
   msg_type:                14



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   length:                  000020
   body:
     verify_data:           1E937DA477EE1F230A41D6E9D41446B7
                            F21CA1B2E2324A552D52B3255EB43DDF

   00000:   14 00 00 20 1E 93 7D A4 77 EE 1F 23 0A 41 D6 E9
   00010:   D4 14 46 B7 F2 1C A1 B2 E2 32 4A 55 2D 52 B3 25
   00020:   5E B4 3D DF

   Record layer message:
   type:                    16
   version:
     major:                 03
     minor:                 03
   length:                  0034
   fragment:                F9887C3654B6CCC6AE7D7B18A46C663F
                            3D1DAF30C9A853A9871077FDD5CA063B
                            2C81BCC9D59FA6E3F5FAD9B2599BB586
                            854A2D76

   00000:   16 03 03 00 34 F9 88 7C 36 54 B6 CC C6 AE 7D 7B
   00010:   18 A4 6C 66 3F 3D 1D AF 30 C9 A8 53 A9 87 10 77
   00020:   FD D5 CA 06 3B 2C 81 BC C9 D5 9F A6 E3 F5 FA D9
   00030:   B2 59 9B B5 86 85 4A 2D 76


   ---------------------------Client---------------------------

   Application data:
   00000:   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
   00010:   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

   Record layer message:
   type:                    17
   version:
     major:                 03
     minor:                 03
   length:                  0030
   fragment:                F14F06FB8557408846080690E7A5525D
                            1C6E9C901D24025486AB79728BF63D06
                            5C09C27233006D65CFF0B5BA87504969

   00000:   17 03 03 00 30 F1 4F 06 FB 85 57 40 88 46 08 06
   00010:   90 E7 A5 52 5D 1C 6E 9C 90 1D 24 02 54 86 AB 79
   00020:   72 8B F6 3D 06 5C 09 C2 72 33 00 6D 65 CF F0 B5
   00030:   BA 87 50 49 69





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   ---------------------------Server---------------------------

   Application data:
   00000:   FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
   00010:   FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF

   Record layer message:
   type:                    17
   version:
     major:                 03
     minor:                 03
   length:                  0030
   fragment:                1561E52A8B6DB258746FFE18F3CDCB11
                            1D0173AF2E5C13741C99BFF13B47CD32
                            B3CED856A9506E706A2340D5841AB114

   00000:   17 03 03 00 30 15 61 E5 2A 8B 6D B2 58 74 6F FE
   00010:   18 F3 CD CB 11 1D 01 73 AF 2E 5C 13 74 1C 99 BF
   00020:   F1 3B 47 CD 32 B3 CE D8 56 A9 50 6E 70 6A 23 40
   00030:   D5 84 1A B1 14


   ---------------------------Client---------------------------

   close_notify alert:
   Alert:
     level:                 01
     description:           00

   00000:   01 00

   Record layer message:
   type:                    15
   version:
     major:                 03
     minor:                 03
   length:                  0012
   fragment:                E530C164642A078CEF528CB465E9DA7E
                            AD4D

   00000:   15 03 03 00 12 E5 30 C1 64 64 2A 07 8C EF 52 8C
   00010:   B4 65 E9 DA 7E AD 4D


   ---------------------------Server---------------------------

   close_notify alert:
   Alert:



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     level:                 01
     description:           00

   00000:   01 00

   Record layer message:
   type:                    15
   version:
     major:                 03
     minor:                 03
   length:                  0012
   fragment:                EB62E5AB78BF2A4B678920A11027EC43
                            0C3F

   00000:   15 03 03 00 12 EB 62 E5 AB 78 BF 2A 4B 67 89 20
   00010:   A1 10 27 EC 43 0C 3F


A.2.  Test Examples for CNT_IMIT cipher suites

A.2.1.  Record Examples


   It is assumed that during Handshake following keys were established:

   - MAC key:
   00000:   ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
   00010:   ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
   - Encryption key:
   00000:   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
   00010:   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
   - IV:
   00000:   00 00 00 00 00 00 00 00

   ---------------------------------------------------------
   seqnum = 0

   Application data:
   00000:   00 00 00 00 00 00 00

   Plaintext:
   00000:   17 03 03 00 07 00 00 00 00 00 00 00

   MAC:
   00000:   30 01 34 a1

   Ciphertext:
   00000:   17 03 03 00 0b 86 71 cd bf 3c 1a ae 0f 62 4b 04



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   ---------------------------------------------------------
   seqnum = 1

   Application data:

   00000:   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
   00010:   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
     ....
   007f0:   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

   Plaintext:
   00000:   17 03 03 08 00 00 00 00 00 00 00 00 00 00 00 00
   00010:   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
     ....
   007f0:   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
   00804:   00 00 00 00 00

   MAC:
   00000:   f7 c3 8b 8a

   Ciphertext:
   00000:   17 03 03 08 04 cf aa 0c b4 2f a5 a4 7a 13 3d 73
   00010:   b9 f2 c0 b0 4f 8c a2 55 52 f8 56 bc be 6a 58 fa
     ....
   007f0:   3e e2 c7 6f a2 30 a0 44 be 21 dc 8e 1a 96 f9 a8
   00804:   88 1f ad 83 45 96 96 84 47



A.2.2.  Handshake Examples

   The ClientHello.extensions and the ServerHello.extensions fields
   contain the renegotiation_info extension (see [RFC5746]) in the
   following examples.


   Server certificate curve OID:
   id-tc26-gost-3410-12-512-paramSetA, "1.2.643.7.1.2.1.2.1"


   Server public key Q_s:
   x = 0x16DB0566C0278AC8204143994824236D
         97F36A13D5433E990B2EAC859D2E9B7A
         E054794655389158B8242923E3841B14
         24FD89F221701C89D9A3BF6A9F946795

   y = 0xD01E80DEC5BD23C8BC6B85F12BBB1635
         A5AE7AD50DE24FB8FD02CB285A4AE65A



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         7D6FBB99AAFFDA80629826F2F7F73282
         220444761615A06D082077C4A00FD4CF

   Server private key d_s:
   0x5F1E83AFA2C4CB2C5633C51380E84E37
     4B013EE7C238330709080CE914B442D4
     34EB016D23FB63FEDC18B62D9DA93D26
     B3B9CE6F663B383303BD5930ED41608B

   ---------------------------Client---------------------------

   ClientHello message:
   msg_type:                01
   length:                  00003a
   body:
     client_version:
       major:               03
       minor:               03
     random:                6A523D6880DCC2DC75CCC43CFD04B616
                            F5C3757B8077B76A9B504949FD3BFDB8
     session_id:
       length:              00
       vector:              --
     cipher_suites:
       length:              0002
       vector:
         CipherSuite:       C102
     compression_methods:
       length:              01
       vector:
         CompressionMethod: 00
     extensions:
       length:              000F
         Extension: /* signature_algorithms */
           extension_type:  000D
           extension_data:
             length:        0006
             vector:
               supported_signature_algorithms:
                 length:    0004
                 vector:
                   /* 1 pair of algorithms */
                   hash:    08
                   signature:
                            41
                   /* 2 pair of algorithms */
                   hash:    08
                   signature:



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                            40
         Extension: /* renegotiation_info */
           extension_type:  FF01
           extension_data:
             length:        0001
             vector:
               renegotiated_connection:
                 length:    00
                 vector:    --

   00000:   01 00 00 3A 03 03 6A 52 3D 68 80 DC C2 DC 75 CC
   00010:   C4 3C FD 04 B6 16 F5 C3 75 7B 80 77 B7 6A 9B 50
   00020:   49 49 FD 3B FD B8 00 00 02 C1 02 01 00 00 0F 00
   00030:   0D 00 06 00 04 08 41 08 40 FF 01 00 01 00

   Record layer message:
   type:                    16
   version:
     major:                 03
     minor:                 03
   length:                  003e
   fragment:                0100003A03036A523D6880DCC2DC75CC
                            C43CFD04B616F5C3757B8077B76A9B50
                            4949FD3BFDB8000002C1020100000F00
                            0D0006000408410840FF01000100

   00000:   16 03 03 00 3E 01 00 00 3A 03 03 6A 52 3D 68 80
   00010:   DC C2 DC 75 CC C4 3C FD 04 B6 16 F5 C3 75 7B 80
   00020:   77 B7 6A 9B 50 49 49 FD 3B FD B8 00 00 02 C1 02
   00030:   01 00 00 0F 00 0D 00 06 00 04 08 41 08 40 FF 01
   00040:   00 01 00


   ---------------------------Server---------------------------

   ServerHello message:
   msg_type:                02
   length:                  00004D
   body:
     client_version:
       major:               03
       minor:               03
     random:                FE92C9516D0E1A67A04C33CD7F2C90B1
                            5E76DCC30815C19F92A6D100915AF2DB
     session_id:
       length:              20
       vector:              12AAA5E5779014711CCD6D265BDEE519
                            1026431C83768EE5EB5A157F940BE9FB



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     cipher_suite:
         CipherSuite:       C102
     compression_method:
         CompressionMethod: 00
     extensions:
       length:              0005
         Extension: /* renegotiation_info */
           extension_type:  FF01
           extension_data:
             length:        0001
             vector:
               renegotiated_connection:
                 length:    00
                 vector:    --

   00000:   02 00 00 4D 03 03 FE 92 C9 51 6D 0E 1A 67 A0 4C
   00010:   33 CD 7F 2C 90 B1 5E 76 DC C3 08 15 C1 9F 92 A6
   00020:   D1 00 91 5A F2 DB 20 12 AA A5 E5 77 90 14 71 1C
   00030:   CD 6D 26 5B DE E5 19 10 26 43 1C 83 76 8E E5 EB
   00040:   5A 15 7F 94 0B E9 FB C1 02 00 00 05 FF 01 00 01
   00050:   00

   Record layer message:
   type:                    16
   version:
     major:                 03
     minor:                 03
   length:                  0051
   fragment:                0200004D0303FE92C9516D0E1A67A04C
                            33CD7F2C90B15E76DCC30815C19F92A6
                            D100915AF2DB2012AAA5E5779014711C
                            CD6D265BDEE5191026431C83768EE5EB
                            5A157F940BE9FBC102000005FF010001
                            00

   00000:   16 03 03 00 51 02 00 00 4D 03 03 FE 92 C9 51 6D
   00010:   0E 1A 67 A0 4C 33 CD 7F 2C 90 B1 5E 76 DC C3 08
   00020:   15 C1 9F 92 A6 D1 00 91 5A F2 DB 20 12 AA A5 E5
   00030:   77 90 14 71 1C CD 6D 26 5B DE E5 19 10 26 43 1C
   00040:   83 76 8E E5 EB 5A 15 7F 94 0B E9 FB C1 02 00 00
   00050:   05 FF 01 00 01 00


   ---------------------------Server---------------------------

   Certificate message:
   msg_type:                0B
   length:                  000266



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   body:
     certificate_list:
       length:              000263
       vector:
         ASN.1Cert:
           length:          000260
           vector:          3082025C308201C8A003020102021478
                            94DC9D920977809191642F1DAEDC26BA
                            3B5104300A06082A8503070101030330
                                          . . .
                            6C12D51F99C98A4A9904F0EA5486FED7
                            FF66AB8EB2425E1ACEAE8A758BDF843B
                            E1A8F6FEBF673015FED7AB86533DBF20

   00000:   0B 00 02 66 00 02 63 00 02 60 30 82 02 5C 30 82
   00010:   01 C8 A0 03 02 01 02 02 14 78 94 DC 9D 92 09 77
   00020:   80 91 91 64 2F 1D AE DC 26 BA 3B 51 04 30 0A 06
   00030:   08 2A 85 03 07 01 01 03 03 30 19 31 17 30 15 06
   00040:   03 55 04 03 13 0E 43 41 20 43 65 72 74 69 66 69
   00050:   63 61 74 65 30 1E 17 0D 31 38 30 31 30 32 30 30
   00060:   30 30 31 31 5A 17 0D 32 32 30 31 30 32 30 30 30
   00070:   30 32 31 5A 30 21 31 1F 30 1D 06 03 55 04 03 13
   00080:   16 53 65 72 76 65 72 20 35 31 32 20 43 65 72 74
   00090:   69 66 69 63 61 74 65 30 81 AA 30 21 06 08 2A 85
   000a0:   03 07 01 01 01 02 30 15 06 09 2A 85 03 07 01 02
   000b0:   01 02 01 06 08 2A 85 03 07 01 01 02 03 03 81 84
   000c0:   00 04 81 80 95 67 94 9F 6A BF A3 D9 89 1C 70 21
   000d0:   F2 89 FD 24 14 1B 84 E3 23 29 24 B8 58 91 38 55
   000e0:   46 79 54 E0 7A 9B 2E 9D 85 AC 2E 0B 99 3E 43 D5
   000f0:   13 6A F3 97 6D 23 24 48 99 43 41 20 C8 8A 27 C0
   00100:   66 05 DB 16 CF D4 0F A0 C4 77 20 08 6D A0 15 16
   00110:   76 44 04 22 82 32 F7 F7 F2 26 98 62 80 DA FF AA
   00120:   99 BB 6F 7D 5A E6 4A 5A 28 CB 02 FD B8 4F E2 0D
   00130:   D5 7A AE A5 35 16 BB 2B F1 85 6B BC C8 23 BD C5
   00140:   DE 80 1E D0 A3 81 93 30 81 90 30 0C 06 03 55 1D
   00150:   13 01 01 FF 04 02 30 00 30 1A 06 03 55 1D 11 04
   00160:   13 30 11 82 09 6C 6F 63 61 6C 68 6F 73 74 87 04
   00170:   7F 00 00 01 30 13 06 03 55 1D 25 04 0C 30 0A 06
   00180:   08 2B 06 01 05 05 07 03 01 30 0F 06 03 55 1D 0F
   00190:   01 01 FF 04 05 03 03 07 B0 00 30 1D 06 03 55 1D
   001a0:   0E 04 16 04 14 AE 46 41 1B FD B3 08 C3 39 03 47
   001b0:   57 57 2B 0F BF A3 6F 9A 99 30 1F 06 03 55 1D 23
   001c0:   04 18 30 16 80 14 7F 7B 7A 15 61 A6 F2 18 A2 E3
   001d0:   48 3B C6 39 D9 7F 42 DB 6D AF 30 0A 06 08 2A 85
   001e0:   03 07 01 01 03 03 03 81 81 00 9C 49 78 F7 1B AB
   001f0:   54 8A 25 6D 2A 18 7C A8 4D 72 4F E1 EF A7 E5 36
   00200:   67 2E 79 1F 8A 0C B6 74 1E B1 63 E2 96 37 8C 5B
   00210:   82 83 EE DA B4 1B A4 22 1E BC E2 05 F6 F8 79 CF



Smyshlyaev, et al.      Expires December 7, 2021               [Page 81]


Internet-Draft       GOST Cipher Suites for TLS 1.2            June 2021


   00220:   EB F0 AD E9 36 07 0F B2 40 E5 0D 04 37 03 7F 2A
   00230:   EC 99 C7 CD 23 9F 6F 20 25 A8 6C 12 D5 1F 99 C9
   00240:   8A 4A 99 04 F0 EA 54 86 FE D7 FF 66 AB 8E B2 42
   00250:   5E 1A CE AE 8A 75 8B DF 84 3B E1 A8 F6 FE BF 67
   00260:   30 15 FE D7 AB 86 53 3D BF 20

   Record layer message:
   type:                    16
   version:
     major:                 03
     minor:                 03
   length:                  026A
   fragment:                0B0002660002630002603082025C3082
                            01C8A00302010202147894DC9D920977
                            809191642F1DAEDC26BA3B5104300A06
                                          . . .
                            EC99C7CD239F6F2025A86C12D51F99C9
                            8A4A9904F0EA5486FED7FF66AB8EB242
                            5E1ACEAE8A758BDF843BE1A8F6FEBF67
                            3015FED7AB86533DBF20

   00000:   16 03 03 02 6A 0B 00 02 66 00 02 63 00 02 60 30
   00010:   82 02 5C 30 82 01 C8 A0 03 02 01 02 02 14 78 94
   00020:   DC 9D 92 09 77 80 91 91 64 2F 1D AE DC 26 BA 3B
   00030:   51 04 30 0A 06 08 2A 85 03 07 01 01 03 03 30 19
   00040:   31 17 30 15 06 03 55 04 03 13 0E 43 41 20 43 65
   00050:   72 74 69 66 69 63 61 74 65 30 1E 17 0D 31 38 30
   00060:   31 30 32 30 30 30 30 31 31 5A 17 0D 32 32 30 31
   00070:   30 32 30 30 30 30 32 31 5A 30 21 31 1F 30 1D 06
   00080:   03 55 04 03 13 16 53 65 72 76 65 72 20 35 31 32
   00090:   20 43 65 72 74 69 66 69 63 61 74 65 30 81 AA 30
   000a0:   21 06 08 2A 85 03 07 01 01 01 02 30 15 06 09 2A
   000b0:   85 03 07 01 02 01 02 01 06 08 2A 85 03 07 01 01
   000c0:   02 03 03 81 84 00 04 81 80 95 67 94 9F 6A BF A3
   000d0:   D9 89 1C 70 21 F2 89 FD 24 14 1B 84 E3 23 29 24
   000e0:   B8 58 91 38 55 46 79 54 E0 7A 9B 2E 9D 85 AC 2E
   000f0:   0B 99 3E 43 D5 13 6A F3 97 6D 23 24 48 99 43 41
   00100:   20 C8 8A 27 C0 66 05 DB 16 CF D4 0F A0 C4 77 20
   00110:   08 6D A0 15 16 76 44 04 22 82 32 F7 F7 F2 26 98
   00120:   62 80 DA FF AA 99 BB 6F 7D 5A E6 4A 5A 28 CB 02
   00130:   FD B8 4F E2 0D D5 7A AE A5 35 16 BB 2B F1 85 6B
   00140:   BC C8 23 BD C5 DE 80 1E D0 A3 81 93 30 81 90 30
   00150:   0C 06 03 55 1D 13 01 01 FF 04 02 30 00 30 1A 06
   00160:   03 55 1D 11 04 13 30 11 82 09 6C 6F 63 61 6C 68
   00170:   6F 73 74 87 04 7F 00 00 01 30 13 06 03 55 1D 25
   00180:   04 0C 30 0A 06 08 2B 06 01 05 05 07 03 01 30 0F
   00190:   06 03 55 1D 0F 01 01 FF 04 05 03 03 07 B0 00 30
   001a0:   1D 06 03 55 1D 0E 04 16 04 14 AE 46 41 1B FD B3



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Internet-Draft       GOST Cipher Suites for TLS 1.2            June 2021


   001b0:   08 C3 39 03 47 57 57 2B 0F BF A3 6F 9A 99 30 1F
   001c0:   06 03 55 1D 23 04 18 30 16 80 14 7F 7B 7A 15 61
   001d0:   A6 F2 18 A2 E3 48 3B C6 39 D9 7F 42 DB 6D AF 30
   001e0:   0A 06 08 2A 85 03 07 01 01 03 03 03 81 81 00 9C
   001f0:   49 78 F7 1B AB 54 8A 25 6D 2A 18 7C A8 4D 72 4F
   00200:   E1 EF A7 E5 36 67 2E 79 1F 8A 0C B6 74 1E B1 63
   00210:   E2 96 37 8C 5B 82 83 EE DA B4 1B A4 22 1E BC E2
   00220:   05 F6 F8 79 CF EB F0 AD E9 36 07 0F B2 40 E5 0D
   00230:   04 37 03 7F 2A EC 99 C7 CD 23 9F 6F 20 25 A8 6C
   00240:   12 D5 1F 99 C9 8A 4A 99 04 F0 EA 54 86 FE D7 FF
   00250:   66 AB 8E B2 42 5E 1A CE AE 8A 75 8B DF 84 3B E1
   00260:   A8 F6 FE BF 67 30 15 FE D7 AB 86 53 3D BF 20


   ---------------------------Server---------------------------

   ServerHelloDone message:
   msg_type:                0E
   length:                  000000
   body:                    --

   00000:   0E 00 00 00

   Record layer message::
   type:                    16
   version:
     major:                 03
     minor:                 03
   length:                  0004
   fragment:                0E000000

   00000:   16 03 03 00 04 0E 00 00 00

   ---------------------------Client---------------------------

   PMS:
   00000:   CE 0D D6 B6 70 42 12 15 2B E4 69 5A 7E 89 F6 4C
   00010:   89 29 A4 0D BF 0A 5A 55 C2 CE 00 2B 06 BA B6 2F

   Random d_eph value:
   0xC96486B1A3732389A162F5AD0145D537
     43C9AC27D42ACF1091CE7EF67E6C3CCA
     0F6C879B2DA3C1607648BAEB96471BD2
     078DF5CAAA4FA83ECC0FFD6D3C8E5D56

   Q_eph ephemeral key:
   x = 0x4B9CB381BCC737E493E43B2D7FD95BFE
         2AEF6BE8F6224882E5E559ADA08170DC



Smyshlyaev, et al.      Expires December 7, 2021               [Page 83]


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         49A815B3A1B3B323D2B50195153CFC60
         DD6139C3770C5762A6A7719FABF84BFB

   y = 0x95CEF28392C846A5EEFCB51C84E4960A
         77B77D0D85EBD22061BFDA0013C5AB6C
         42DDD04973F65D2AEB8A5427A53D6872
         CF2D68F5F722C4640D7AAF2E0194FBD0

   HASH(r_c | r_s):
   00000:   FB F3 9D 10 E8 00 AF 70 E7 AA 22 C1 10 DA 94 A9
   00010:   9A 58 98 D8 45 27 C7 CB DE C1 1E 53 39 90 6A 1A

   K_EXP:
   00000:   3F D9 99 D1 68 4A 15 CC 9B DD 5A 35 06 7A F6 98
   00010:   17 15 00 22 E0 95 54 AC 79 1A 60 F1 61 F5 53 49

   IV:
   00000:   FB F3 9D 10 E8 00 AF 70

   CEK_ENC:
   00000:   D6 22 D1 67 A5 64 2E 29 52 5A 29 5C B9 F2 8F 96
   00010:   F2 8B 0E FA A7 D3 A2 BE E1 49 B0 11 78 C2 DF D5

   CEK_MAC:
   00000:   4C 93 36 57

   PMSEXP:
   00000:   FB F3 9D 10 E8 00 AF 70 D6 22 D1 67 A5 64 2E 29
   00010:   52 5A 29 5C B9 F2 8F 96 F2 8B 0E FA A7 D3 A2 BE
   00020:   E1 49 B0 11 78 C2 DF D5 4C 93 36 57

   ---------------------------Client---------------------------

   ClientKeyExchange message:
   msg_type:                10
   length:                  0000F5
   body:
     exchange_keys:         3081F23081EF30280420D622D167A564
                            2E29525A295CB9F28F96F28B0EFAA7D3
                            A2BEE149B01178C2DFD504044C933657
                                          . . .
                            DABF6120D2EB850D7DB7770A96E4841C
                            B5FCEEA546C89283F2CE950408FBF39D
                            10E800AF70

   00000:   10 00 00 F5 30 81 F2 30 81 EF 30 28 04 20 D6 22
   00010:   D1 67 A5 64 2E 29 52 5A 29 5C B9 F2 8F 96 F2 8B
   00020:   0E FA A7 D3 A2 BE E1 49 B0 11 78 C2 DF D5 04 04



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Internet-Draft       GOST Cipher Suites for TLS 1.2            June 2021


   00030:   4C 93 36 57 A0 81 C2 06 09 2A 85 03 07 01 02 05
   00040:   01 01 A0 81 AA 30 21 06 08 2A 85 03 07 01 01 01
   00050:   02 30 15 06 09 2A 85 03 07 01 02 01 02 01 06 08
   00060:   2A 85 03 07 01 01 02 03 03 81 84 00 04 81 80 FB
   00070:   4B F8 AB 9F 71 A7 A6 62 57 0C 77 C3 39 61 DD 60
   00080:   FC 3C 15 95 01 B5 D2 23 B3 B3 A1 B3 15 A8 49 DC
   00090:   70 81 A0 AD 59 E5 E5 82 48 22 F6 E8 6B EF 2A FE
   000A0:   5B D9 7F 2D 3B E4 93 E4 37 C7 BC 81 B3 9C 4B D0
   000B0:   FB 94 01 2E AF 7A 0D 64 C4 22 F7 F5 68 2D CF 72
   000C0:   68 3D A5 27 54 8A EB 2A 5D F6 73 49 D0 DD 42 6C
   000D0:   AB C5 13 00 DA BF 61 20 D2 EB 85 0D 7D B7 77 0A
   000E0:   96 E4 84 1C B5 FC EE A5 46 C8 92 83 F2 CE 95 04
   000F0:   08 FB F3 9D 10 E8 00 AF 70

   Record layer message:
   type:                    16
   version:
     major:                 03
     minor:                 03
   length:                  00F9
   fragment:                100000F53081F23081EF30280420D622
                            D167A5642E29525A295CB9F28F96F28B
                            0EFAA7D3A2BEE149B01178C2DFD50404
                                          . . .
                            ABC51300DABF6120D2EB850D7DB7770A
                            96E4841CB5FCEEA546C89283F2CE9504
                            08FBF39D10E800AF70

   00000:   16 03 03 00 F9 10 00 00 F5 30 81 F2 30 81 EF 30
   00010:   28 04 20 D6 22 D1 67 A5 64 2E 29 52 5A 29 5C B9
   00020:   F2 8F 96 F2 8B 0E FA A7 D3 A2 BE E1 49 B0 11 78
   00030:   C2 DF D5 04 04 4C 93 36 57 A0 81 C2 06 09 2A 85
   00040:   03 07 01 02 05 01 01 A0 81 AA 30 21 06 08 2A 85
   00050:   03 07 01 01 01 02 30 15 06 09 2A 85 03 07 01 02
   00060:   01 02 01 06 08 2A 85 03 07 01 01 02 03 03 81 84
   00070:   00 04 81 80 FB 4B F8 AB 9F 71 A7 A6 62 57 0C 77
   00080:   C3 39 61 DD 60 FC 3C 15 95 01 B5 D2 23 B3 B3 A1
   00090:   B3 15 A8 49 DC 70 81 A0 AD 59 E5 E5 82 48 22 F6
   000A0:   E8 6B EF 2A FE 5B D9 7F 2D 3B E4 93 E4 37 C7 BC
   000B0:   81 B3 9C 4B D0 FB 94 01 2E AF 7A 0D 64 C4 22 F7
   000C0:   F5 68 2D CF 72 68 3D A5 27 54 8A EB 2A 5D F6 73
   000D0:   49 D0 DD 42 6C AB C5 13 00 DA BF 61 20 D2 EB 85
   000E0:   0D 7D B7 77 0A 96 E4 84 1C B5 FC EE A5 46 C8 92
   000F0:   83 F2 CE 95 04 08 FB F3 9D 10 E8 00 AF 70


   ---------------------------Client---------------------------




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   HASH(HM):
   00000:   F8 D6 FE EB 17 64 4D 17 B0 38 36 A6 51 EB 87 69
   00010:   BD EA A2 D3 EB 18 47 F6 91 91 42 7C 30 D0 17 8E

   MS:
   00000:   BE 57 46 C8 BB B7 84 7E 97 8F D4 C9 4F 52 34 52
   00010:   44 2C 8E B1 72 FD E6 28 1C 18 C5 44 63 B1 F9 4C
   00020:   2B D9 81 40 05 41 6D BB 0F 90 A5 7E A4 E0 6B 50

   Client connection key material
   K_write_MAC|K_read_MAC|K_write_ENC|K_read_ENC|IV_write|IV_read:
   00000:   F3 37 F6 A8 6F F3 1F CA 52 EA 64 7C DE E3 B7 83
   00010:   34 AB 77 B5 7F E0 DB 2F C0 C8 71 EC DC AC A5 A8
   00020:   FB A0 4C 21 32 82 3A 24 96 EF 93 6F 0E BC F3 0E
   00030:   A0 CB 7E AF 6C A7 94 75 4F 1F 45 B1 77 22 DE B4
   00040:   4E 5B C3 2D 44 30 AF 58 93 11 6A CF 81 A3 BE 0C
   00050:   90 D2 EA 8E 76 E0 84 07 28 BA F5 E2 B2 F9 40 C0
   00060:   AE 18 26 7B B6 34 C1 6A 1D 1A C1 24 73 50 95 4B
   00070:   2F EE 9B 77 F3 0D 18 D5 54 01 2B 43 78 60 87 0A
   00080:   D9 21 A8 4B 07 FF 98 AF 8C 82 38 6B 91 FB BA 64


   ---------------------------Server---------------------------

   PMSEXP extracted:
   00000:   FB F3 9D 10 E8 00 AF 70 D6 22 D1 67 A5 64 2E 29
   00010:   52 5A 29 5C B9 F2 8F 96 F2 8B 0E FA A7 D3 A2 BE
   00020:   E1 49 B0 11 78 C2 DF D5 4C 93 36 57

   HASH(r_c | r_s):
   00000:   FB F3 9D 10 E8 00 AF 70 E7 AA 22 C1 10 DA 94 A9
   00010:   9A 58 98 D8 45 27 C7 CB DE C1 1E 53 39 90 6A 1A

   K_EXP:
   00000:   3F D9 99 D1 68 4A 15 CC 9B DD 5A 35 06 7A F6 98
   00010:   17 15 00 22 E0 95 54 AC 79 1A 60 F1 61 F5 53 49

   PMS:
   00000:   CE 0D D6 B6 70 42 12 15 2B E4 69 5A 7E 89 F6 4C
   00010:   89 29 A4 0D BF 0A 5A 55 C2 CE 00 2B 06 BA B6 2F

   ---------------------------Server---------------------------

   HASH(HM):
   00000:   F8 D6 FE EB 17 64 4D 17 B0 38 36 A6 51 EB 87 69
   00010:   BD EA A2 D3 EB 18 47 F6 91 91 42 7C 30 D0 17 8E

   MS:



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Internet-Draft       GOST Cipher Suites for TLS 1.2            June 2021


   00000:   BE 57 46 C8 BB B7 84 7E 97 8F D4 C9 4F 52 34 52
   00010:   44 2C 8E B1 72 FD E6 28 1C 18 C5 44 63 B1 F9 4C
   00020:   2B D9 81 40 05 41 6D BB 0F 90 A5 7E A4 E0 6B 50

   Client connection key material
   K_read_MAC|K_write_MAC|K_read_ENC|K_write_ENC|IV_read|IV_write:
   00000:   F3 37 F6 A8 6F F3 1F CA 52 EA 64 7C DE E3 B7 83
   00010:   34 AB 77 B5 7F E0 DB 2F C0 C8 71 EC DC AC A5 A8
   00020:   FB A0 4C 21 32 82 3A 24 96 EF 93 6F 0E BC F3 0E
   00030:   A0 CB 7E AF 6C A7 94 75 4F 1F 45 B1 77 22 DE B4
   00040:   4E 5B C3 2D 44 30 AF 58 93 11 6A CF 81 A3 BE 0C
   00050:   90 D2 EA 8E 76 E0 84 07 28 BA F5 E2 B2 F9 40 C0
   00060:   AE 18 26 7B B6 34 C1 6A 1D 1A C1 24 73 50 95 4B
   00070:   2F EE 9B 77 F3 0D 18 D5 54 01 2B 43 78 60 87 0A
   00080:   D9 21 A8 4B 07 FF 98 AF 8C 82 38 6B 91 FB BA 64

   ---------------------------Client---------------------------

   ChangeCipherSpec message:
   type:                    01

   00000:   01

   Record layer message:
   type:                    14
   version:
     major:                 03
     minor:                 03
   length:                  0001
   fragment:                01

   00000:   14 03 03 00 01 01


   ---------------------------Client---------------------------

   HASH(HM):
   00000:   F8 D6 FE EB 17 64 4D 17 B0 38 36 A6 51 EB 87 69
   00010:   BD EA A2 D3 EB 18 47 F6 91 91 42 7C 30 D0 17 8E

   Finished message:
   msg_type:                14
   length:                  00000C
   body:
     verify_data:           D3EE1DEA725CD7080C744311

   00000:   14 00 00 0C D3 EE 1D EA 72 5C D7 08 0C 74 43 11




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   Record layer message:
   type:                    16
   version:
     major:                 03
     minor:                 03
   length:                  0014
   fragment:                8854A0ED0CCBDAE076FA7D22D763A8D1
                            AF701BBB

   00000:   16 03 03 00 14 88 54 A0 ED 0C CB DA E0 76 FA 7D
   00010:   22 D7 63 A8 D1 AF 70 1B BB


   ---------------------------Server---------------------------

   ChangeCipherSpec message:
   type:                    01

   00000:   01

   Record layer message:
   type:                    14
   version:
     major:                 03
     minor:                 03
   length:                  0001
   fragment:                01

   00000:   14 03 03 00 01 01


   ---------------------------Server---------------------------

   HASH(HM):
   00000:   9C 9F C4 E3 32 5B 5F B3 70 B9 94 2A 71 D2 6E F0
   00010:   10 71 D8 A5 A1 8F 69 E8 C2 0B 70 CC 90 E9 A9 46


   Finished message:
   msg_type:                14
   length:                  00000C
   body:
     verify_data:           D6A2A697E9F23DB0F9017A79

   00000:   14 00 00 0C D6 A2 A6 97 E9 F2 3D B0 F9 01 7A 79

   Record layer message:
   type:                    16



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   version:
     major:                 03
     minor:                 03
   length:                  0014
   fragment:                7BDDBB3C0A6A4A9E302B468CCD5CF786
                            665FFEBC

   00000:   16 03 03 00 14 7B DD BB 3C 0A 6A 4A 9E 30 2B 46
   00010:   8C CD 5C F7 86 66 5F FE BC


   ---------------------------Client---------------------------

   Application data:
   00000:   48 45 4C 4F 0A

   Record layer message:
   type:                    17
   version:
     major:                 03
     minor:                 03
   length:                  0009
   fragment:                A8951D9389D1AEFE3B

   00000:   17 03 03 00 09 A8 95 1D 93 89 D1 AE FE 3B


   ---------------------------Server---------------------------

   Application data:
   00000:   48 45 4C 4F 0A

   Record layer message:
   type:                    17
   version:
     major:                 03
     minor:                 03
   length:                  0009
   fragment:                0F368E5CEC86B4F8D7

   00000:   17 03 03 00 09 0F 36 8E 5C EC 86 B4 F8 D7


   ---------------------------Client---------------------------

   close_notify alert:
   Alert:
     level:                 01



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     description:           00

   00000:   01 00

   Record layer message:
   type:                    15
   version:
     major:                 03
     minor:                 03
   length:                  0006
   fragment:                F91FCD98F309

   00000:   15 03 03 00 06 F9 1F CD 98 F3 09


   ---------------------------Server---------------------------

   close_notify alert:
   Alert:
     level:                 01
     description:           00

   00000:   01 00

   Record layer message:
   type:                    15
   version:
     major:                 03
     minor:                 03
   length:                  0006
   fragment:                117B57AD5FED

   00000:   15 03 03 00 06 11 7B 57 AD 5F ED





Appendix B.  Contributors

   o  Evgeny Alekseev
      CryptoPro
      alekseev@cryptopro.ru

   o  Ekaterina Smyshlyaeva
      CryptoPro
      ess@cryptopro.ru




Smyshlyaev, et al.      Expires December 7, 2021               [Page 90]


Internet-Draft       GOST Cipher Suites for TLS 1.2            June 2021


   o  Grigory Sedov
      CryptoPro
      sedovgk@cryptopro.ru

   o  Dmitry Eremin-Solenikov
      Auriga
      dbaryshkov@gmail.com

Appendix C.  Acknowledgments

Authors' Addresses

   Stanislav Smyshlyaev (editor)
   CryptoPro
   18, Suschevsky val
   Moscow  127018
   Russian Federation

   Phone: +7 (495) 995-48-20
   Email: svs@cryptopro.ru


   Dmitry Belyavsky
   Cryptocom
   14/2 Kedrova st
   Moscow  117218
   Russian Federation

   Email: beldmit@gmail.com


   Markku-Juhani O. Saarinen
   Independent Consultant

   Email: mjos@iki.fi
















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