NETCONF Working Group K. Watsen
Internet-Draft Watsen Networks
Intended status: Standards Track H. Wang
Expires: October 31, 2019 Huawei
April 29, 2019
Common YANG Data Types for Cryptography
draft-ietf-netconf-crypto-types-06
Abstract
This document defines YANG identities, typedefs, the groupings useful
for cryptographic applications.
Editorial Note (To be removed by RFC Editor)
This draft contains many placeholder values that need to be replaced
with finalized values at the time of publication. This note
summarizes all of the substitutions that are needed. No other RFC
Editor instructions are specified elsewhere in this document.
Artwork in this document contains shorthand references to drafts in
progress. Please apply the following replacements:
o "XXXX" --> the assigned RFC value for this draft
Artwork in this document contains placeholder values for the date of
publication of this draft. Please apply the following replacement:
o "2019-04-29" --> the publication date of this draft
The following Appendix section is to be removed prior to publication:
o Appendix B. Change Log
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
Watsen & Wang Expires October 31, 2019 [Page 1]
Internet-Draft Common YANG Data Types for Cryptography April 2019
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 October 31, 2019.
Copyright Notice
Copyright (c) 2019 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
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. The Crypto Types Module . . . . . . . . . . . . . . . . . . . 3
2.1. Tree Diagram . . . . . . . . . . . . . . . . . . . . . . 3
2.2. YANG Module . . . . . . . . . . . . . . . . . . . . . . . 5
3. Security Considerations . . . . . . . . . . . . . . . . . . . 42
3.1. Support for Algorithms . . . . . . . . . . . . . . . . . 42
3.2. No Support for CRMF . . . . . . . . . . . . . . . . . . . 43
3.3. Access to Data Nodes . . . . . . . . . . . . . . . . . . 43
4. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 44
4.1. The IETF XML Registry . . . . . . . . . . . . . . . . . . 44
4.2. The YANG Module Names Registry . . . . . . . . . . . . . 44
5. References . . . . . . . . . . . . . . . . . . . . . . . . . 45
5.1. Normative References . . . . . . . . . . . . . . . . . . 45
5.2. Informative References . . . . . . . . . . . . . . . . . 47
Appendix A. Examples . . . . . . . . . . . . . . . . . . . . . . 50
A.1. The "asymmetric-key-pair-with-certs-grouping" Grouping . 50
A.2. The "generate-hidden-key" Action . . . . . . . . . . . . 52
A.3. The "install-hidden-key" Action . . . . . . . . . . . . . 53
A.4. The "generate-certificate-signing-request" Action . . . . 53
A.5. The "certificate-expiration" Notification . . . . . . . . 54
Appendix B. Change Log . . . . . . . . . . . . . . . . . . . . . 55
B.1. I-D to 00 . . . . . . . . . . . . . . . . . . . . . . . . 55
B.2. 00 to 01 . . . . . . . . . . . . . . . . . . . . . . . . 55
B.3. 01 to 02 . . . . . . . . . . . . . . . . . . . . . . . . 55
B.4. 02 to 03 . . . . . . . . . . . . . . . . . . . . . . . . 56
B.5. 03 to 04 . . . . . . . . . . . . . . . . . . . . . . . . 56
Watsen & Wang Expires October 31, 2019 [Page 2]
Internet-Draft Common YANG Data Types for Cryptography April 2019
B.6. 04 to 05 . . . . . . . . . . . . . . . . . . . . . . . . 57
B.7. 05 to 06 . . . . . . . . . . . . . . . . . . . . . . . . 57
Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . . 57
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 58
1. Introduction
This document defines a YANG 1.1 [RFC7950] module specifying
identities, typedefs, and groupings useful for cryptography.
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.
2. The Crypto Types Module
2.1. Tree Diagram
This section provides a tree diagram [RFC8340] for the "ietf-crypto-
types" module. Only the groupings as represented, as tree diagrams
have no means to represent identities or typedefs.
module: ietf-crypto-types
grouping public-key-grouping:
+---- algorithm? asymmetric-key-algorithm-ref
+---- public-key? binary
grouping asymmetric-key-pair-grouping:
+---- algorithm? asymmetric-key-algorithm-ref
+---- public-key? binary
+---- private-key? union
+---x generate-hidden-key
| +---- input
| +---w algorithm asymmetric-key-algorithm-ref
+---x install-hidden-key
+---- input
+---w algorithm asymmetric-key-algorithm-ref
+---w public-key? binary
+---w private-key? binary
grouping trust-anchor-cert-grouping:
+---- cert? trust-anchor-cert-cms
+---n certificate-expiration
+--ro expiration-date ietf-yang-types:date-and-time
grouping trust-anchor-certs-grouping:
+---- cert* trust-anchor-cert-cms
+---n certificate-expiration
Watsen & Wang Expires October 31, 2019 [Page 3]
Internet-Draft Common YANG Data Types for Cryptography April 2019
+--ro expiration-date ietf-yang-types:date-and-time
grouping end-entity-cert-grouping:
+---- cert? end-entity-cert-cms
+---n certificate-expiration
+--ro expiration-date ietf-yang-types:date-and-time
grouping end-entity-certs-grouping:
+---- cert* end-entity-cert-cms
+---n certificate-expiration
+--ro expiration-date ietf-yang-types:date-and-time
grouping asymmetric-key-pair-with-cert-grouping:
+---- algorithm?
| asymmetric-key-algorithm-ref
+---- public-key? binary
+---- private-key? union
+---x generate-hidden-key
| +---- input
| +---w algorithm asymmetric-key-algorithm-ref
+---x install-hidden-key
| +---- input
| +---w algorithm asymmetric-key-algorithm-ref
| +---w public-key? binary
| +---w private-key? binary
+---- cert? end-entity-cert-cms
+---n certificate-expiration
+--ro expiration-date ietf-yang-types:date-and-time
+---x generate-certificate-signing-request
+---- input
| +---w subject binary
| +---w attributes? binary
+---- output
+--ro certificate-signing-request binary
grouping asymmetric-key-pair-with-certs-grouping:
+---- algorithm?
| asymmetric-key-algorithm-ref
+---- public-key? binary
+---- private-key? union
+---x generate-hidden-key
| +---- input
| +---w algorithm asymmetric-key-algorithm-ref
+---x install-hidden-key
| +---- input
| +---w algorithm asymmetric-key-algorithm-ref
| +---w public-key? binary
| +---w private-key? binary
+---- certificates
| +---- certificate* [name]
| +---- name string
| +---- cert? end-entity-cert-cms
Watsen & Wang Expires October 31, 2019 [Page 4]
Internet-Draft Common YANG Data Types for Cryptography April 2019
| +---n certificate-expiration
| +--ro expiration-date ietf-yang-types:date-and-time
+---x generate-certificate-signing-request
+---- input
| +---w subject binary
| +---w attributes? binary
+---- output
+--ro certificate-signing-request binary
2.2. YANG Module
This module has normative references to [RFC2404], [RFC3565],
[RFC3686], [RFC4106], [RFC4253], [RFC4279], [RFC4309], [RFC4494],
[RFC4543], [RFC4868], [RFC5280], [RFC5652], [RFC5656], [RFC6187],
[RFC6991], [RFC7919], [RFC8268], [RFC8332], [RFC8341], [RFC8422],
[RFC8446], and [ITU.X690.2015].
This module has an informational reference to [RFC2986], [RFC3174],
[RFC4493], [RFC5915], [RFC6125], [RFC6234], [RFC6239], [RFC6507],
[RFC8017], [RFC8032], [RFC8439].
<CODE BEGINS> file "ietf-crypto-types@2019-04-29.yang"
module ietf-crypto-types {
yang-version 1.1;
namespace "urn:ietf:params:xml:ns:yang:ietf-crypto-types";
prefix ct;
import ietf-yang-types {
prefix yang;
reference
"RFC 6991: Common YANG Data Types";
}
import ietf-netconf-acm {
prefix nacm;
reference
"RFC 8341: Network Configuration Access Control Model";
}
organization
"IETF NETCONF (Network Configuration) Working Group";
contact
"WG Web: <http://datatracker.ietf.org/wg/netconf/>
WG List: <mailto:netconf@ietf.org>
Author: Kent Watsen <mailto:kent+ietf@watsen.net>
Author: Wang Haiguang <wang.haiguang.shieldlab@huawei.com>";
Watsen & Wang Expires October 31, 2019 [Page 5]
Internet-Draft Common YANG Data Types for Cryptography April 2019
description
"This module defines common YANG types for cryptographic
applications.
Copyright (c) 2019 IETF Trust and the persons identified
as authors of the code. All rights reserved.
Redistribution and use in source and binary forms, with
or without modification, is permitted pursuant to, and
subject to the license terms contained in, the Simplified
BSD License set forth in Section 4.c of the IETF Trust's
Legal Provisions Relating to IETF Documents
(https://trustee.ietf.org/license-info).
This version of this YANG module is part of RFC XXXX
(https://www.rfc-editor.org/info/rfcXXXX); see the RFC
itself for full legal notices.;
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 (RFC 2119)
(RFC 8174) when, and only when, they appear in all
capitals, as shown here.";
revision 2019-04-29 {
description
"Initial version";
reference
"RFC XXXX: Common YANG Data Types for Cryptography";
}
/**************************************/
/* Identities for Hash Algorithms */
/**************************************/
identity hash-algorithm {
description
"A base identity for hash algorithm verification.";
}
identity sha-224 {
base hash-algorithm;
description
"The SHA-224 algorithm.";
reference
"RFC 6234: US Secure Hash Algorithms.";
}
Watsen & Wang Expires October 31, 2019 [Page 6]
Internet-Draft Common YANG Data Types for Cryptography April 2019
identity sha-256 {
base hash-algorithm;
description
"The SHA-256 algorithm.";
reference
"RFC 6234: US Secure Hash Algorithms.";
}
identity sha-384 {
base hash-algorithm;
description
"The SHA-384 algorithm.";
reference
"RFC 6234: US Secure Hash Algorithms.";
}
identity sha-512 {
base hash-algorithm;
description
"The SHA-512 algorithm.";
reference
"RFC 6234: US Secure Hash Algorithms.";
}
/***********************************************/
/* Identities for Asymmetric Key Algorithms */
/***********************************************/
identity asymmetric-key-algorithm {
description
"Base identity from which all asymmetric key
encryption Algorithm.";
}
identity rsa1024 {
base asymmetric-key-algorithm;
description
"The RSA algorithm using a 1024-bit key.";
reference
"RFC 8017:
PKCS #1: RSA Cryptography Specifications Version 2.2.";
}
identity rsa2048 {
base asymmetric-key-algorithm;
description
"The RSA algorithm using a 2048-bit key.";
reference
Watsen & Wang Expires October 31, 2019 [Page 7]
Internet-Draft Common YANG Data Types for Cryptography April 2019
"RFC 8017:
PKCS #1: RSA Cryptography Specifications Version 2.2.";
}
identity rsa3072 {
base asymmetric-key-algorithm;
description
"The RSA algorithm using a 3072-bit key.";
reference
"RFC 8017:
PKCS #1: RSA Cryptography Specifications Version 2.2.";
}
identity rsa4096 {
base asymmetric-key-algorithm;
description
"The RSA algorithm using a 4096-bit key.";
reference
"RFC 8017:
PKCS #1: RSA Cryptography Specifications Version 2.2.";
}
identity rsa7680 {
base asymmetric-key-algorithm;
description
"The RSA algorithm using a 7680-bit key.";
reference
"RFC 8017:
PKCS #1: RSA Cryptography Specifications Version 2.2.";
}
identity rsa15360 {
base asymmetric-key-algorithm;
description
"The RSA algorithm using a 15360-bit key.";
reference
"RFC 8017:
PKCS #1: RSA Cryptography Specifications Version 2.2.";
}
identity secp192r1 {
base asymmetric-key-algorithm;
description
"The ECDSA algorithm using a NIST P256 Curve.";
reference
"RFC 6090:
Fundamental Elliptic Curve Cryptography Algorithms.";
}
Watsen & Wang Expires October 31, 2019 [Page 8]
Internet-Draft Common YANG Data Types for Cryptography April 2019
identity secp224r1 {
base asymmetric-key-algorithm;
description
"The ECDSA algorithm using a NIST P256 Curve.";
reference
"RFC 6090:
Fundamental Elliptic Curve Cryptography Algorithms.";
}
identity secp256r1 {
base asymmetric-key-algorithm;
description
"The ECDSA algorithm using a NIST P256 Curve.";
reference
"RFC 6090:
Fundamental Elliptic Curve Cryptography Algorithms.";
}
identity secp384r1 {
base asymmetric-key-algorithm;
description
"The ECDSA algorithm using a NIST P256 Curve.";
reference
"RFC 6090:
Fundamental Elliptic Curve Cryptography Algorithms.";
}
identity secp521r1 {
base asymmetric-key-algorithm;
description
"The ECDSA algorithm using a NIST P256 Curve.";
reference
"RFC 6090:
Fundamental Elliptic Curve Cryptography Algorithms.";
}
/*************************************/
/* Identities for MAC Algorithms */
/*************************************/
identity mac-algorithm {
description
"A base identity for mac generation.";
}
identity hmac-sha1 {
base mac-algorithm;
description
Watsen & Wang Expires October 31, 2019 [Page 9]
Internet-Draft Common YANG Data Types for Cryptography April 2019
"Generating MAC using SHA1 hash function";
reference
"RFC 3174: US Secure Hash Algorithm 1 (SHA1)";
}
identity hmac-sha1-96 {
base mac-algorithm;
description
"Generating MAC using SHA1 hash function";
reference
"RFC 2404: The Use of HMAC-SHA-1-96 within ESP and AH";
}
identity hmac-sha2-224 {
base mac-algorithm;
description
"Generating MAC using SHA2 hash function";
reference
"RFC 6234:
US Secure Hash Algorithms (SHA and SHA-based HMAC and
HKDF)";
}
identity hmac-sha2-256 {
base mac-algorithm;
description
"Generating MAC using SHA2 hash function";
reference
"RFC 6234:
US Secure Hash Algorithms (SHA and SHA-based HMAC and
HKDF)";
}
identity hmac-sha2-256-128 {
base mac-algorithm;
description
"Generating a 256 bits MAC using SHA2 hash function and
truncate it to 128 bits";
reference
"RFC 4868:
Using HMAC-SHA-256, HMAC-SHA-384, and HMAC-SHA-512
with IPsec";
}
identity hmac-sha2-384 {
base mac-algorithm;
description
"Generating MAC using SHA2 hash function";
Watsen & Wang Expires October 31, 2019 [Page 10]
Internet-Draft Common YANG Data Types for Cryptography April 2019
reference
"RFC 6234:
US Secure Hash Algorithms (SHA and SHA-based HMAC and
HKDF)";
}
identity hmac-sha2-384-192 {
base mac-algorithm;
description
"Generating a 384 bits MAC using SHA2 hash function and
truncate it to 192 bits";
reference
"RFC 4868:
Using HMAC-SHA-256, HMAC-SHA-384, and HMAC-SHA-512 with
IPsec";
}
identity hmac-sha2-512 {
base mac-algorithm;
description
"Generating MAC using SHA2 hash function";
reference
"RFC 6234:
US Secure Hash Algorithms (SHA and SHA-based HMAC and
HKDF)";
}
identity hmac-sha2-512-256 {
base mac-algorithm;
description
"Generating a 512 bits MAC using SHA2 hash function and
truncating it to 256 bits";
reference
"RFC 4868:
Using HMAC-SHA-256, HMAC-SHA-384, and HMAC-SHA-512 with
IPsec";
}
identity aes-128-gmac {
base mac-algorithm;
description
"Generating MAC using the Advanced Encryption Standard (AES)
Galois Message Authentication Code (GMAC) as a mechanism to
provide data origin authentication";
reference
"RFC 4543:
The Use of Galois Message Authentication Code (GMAC) in
IPsec ESP and AH";
Watsen & Wang Expires October 31, 2019 [Page 11]
Internet-Draft Common YANG Data Types for Cryptography April 2019
}
identity aes-192-gmac {
base mac-algorithm;
description
"Generating MAC using the Advanced Encryption Standard (AES)
Galois Message Authentication Code (GMAC) as a mechanism to
provide data origin authentication";
reference
"RFC 4543:
The Use of Galois Message Authentication Code (GMAC) in
IPsec ESP and AH";
}
identity aes-256-gmac {
base mac-algorithm;
description
"Generating MAC using the Advanced Encryption Standard (AES)
Galois Message Authentication Code (GMAC) as a mechanism to
provide data origin authentication";
reference
"RFC 4543:
The Use of Galois Message Authentication Code (GMAC) in
IPsec ESP and AH";
}
identity aes-cmac-96 {
base mac-algorithm;
description
"Generating MAC using Advanced Encryption Standard (AES)
Cipher-based Message Authentication Code (CMAC)";
reference
"RFC 4494: The AES-CMAC-96 Algorithm and its Use with IPsec";
}
identity aes-cmac-128 {
base mac-algorithm;
description
"Generating MAC using Advanced Encryption Standard (AES)
Cipher-based Message Authentication Code (CMAC)";
reference
"RFC 4493: The AES-CMAC Algorithm";
}
/********************************************/
/* Identities for Encryption Algorithms */
/********************************************/
Watsen & Wang Expires October 31, 2019 [Page 12]
Internet-Draft Common YANG Data Types for Cryptography April 2019
identity encryption-algorithm {
description
"A base identity for encryption algorithm.";
}
identity aes-128-cbc {
base encryption-algorithm;
description
"Encrypt message with AES algorithm in CBC mode with a key
length of 128 bits";
reference
"RFC 3565:
Use of the Advanced Encryption Standard (AES) Encryption
Algorithm in Cryptographic Message Syntax (CMS)";
}
identity aes-192-cbc {
base encryption-algorithm;
description
"Encrypt message with AES algorithm in CBC mode with a key
length of 192 bits";
reference
"RFC 3565:
Use of the Advanced Encryption Standard (AES) Encryption
Algorithm in Cryptographic Message Syntax (CMS)";
}
identity aes-256-cbc {
base encryption-algorithm;
description
"Encrypt message with AES algorithm in CBC mode with a key
length of 256 bits";
reference
"RFC 3565:
Use of the Advanced Encryption Standard (AES) Encryption
Algorithm in Cryptographic Message Syntax (CMS)";
}
identity aes-128-ctr {
base encryption-algorithm;
description
"Encrypt message with AES algorithm in CTR mode with a key
length of 128 bits";
reference
"RFC 3686:
Using Advanced Encryption Standard (AES) Counter Mode with
IPsec Encapsulating Security Payload (ESP)";
}
Watsen & Wang Expires October 31, 2019 [Page 13]
Internet-Draft Common YANG Data Types for Cryptography April 2019
identity aes-192-ctr {
base encryption-algorithm;
description
"Encrypt message with AES algorithm in CTR mode with a key
length of 192 bits";
reference
"RFC 3686:
Using Advanced Encryption Standard (AES) Counter Mode with
IPsec Encapsulating Security Payload (ESP)";
}
identity aes-256-ctr {
base encryption-algorithm;
description
"Encrypt message with AES algorithm in CTR mode with a key
length of 256 bits";
reference
"RFC 3686:
Using Advanced Encryption Standard (AES) Counter Mode with
IPsec Encapsulating Security Payload (ESP)";
}
/****************************************************/
/* Identities for Encryption and MAC Algorithms */
/****************************************************/
identity encryption-and-mac-algorithm {
description
"A base identity for encryption and MAC algorithm.";
}
identity aes-128-ccm {
base encryption-and-mac-algorithm;
description
"Encrypt message with AES algorithm in CCM mode with a key
length of 128 bits; it can also be used for generating MAC";
reference
"RFC 4309:
Using Advanced Encryption Standard (AES) CCM Mode with
IPsec Encapsulating Security Payload (ESP)";
}
identity aes-192-ccm {
base encryption-and-mac-algorithm;
description
"Encrypt message with AES algorithm in CCM mode with a key
length of 192 bits; it can also be used for generating MAC";
reference
Watsen & Wang Expires October 31, 2019 [Page 14]
Internet-Draft Common YANG Data Types for Cryptography April 2019
"RFC 4309:
Using Advanced Encryption Standard (AES) CCM Mode with
IPsec Encapsulating Security Payload (ESP)";
}
identity aes-256-ccm {
base encryption-and-mac-algorithm;
description
"Encrypt message with AES algorithm in CCM mode with a key
length of 256 bits; it can also be used for generating MAC";
reference
"RFC 4309:
Using Advanced Encryption Standard (AES) CCM Mode with
IPsec Encapsulating Security Payload (ESP)";
}
identity aes-128-gcm {
base encryption-and-mac-algorithm;
description
"Encrypt message with AES algorithm in GCM mode with a key
length of 128 bits; it can also be used for generating MAC";
reference
"RFC 4106:
The Use of Galois/Counter Mode (GCM) in IPsec Encapsulating
Security Payload (ESP)";
}
identity aes-192-gcm {
base encryption-and-mac-algorithm;
description
"Encrypt message with AES algorithm in GCM mode with a key
length of 192 bits; it can also be used for generating MAC";
reference
"RFC 4106:
The Use of Galois/Counter Mode (GCM) in IPsec Encapsulating
Security Payload (ESP)";
}
identity mac-aes-256-gcm {
base encryption-and-mac-algorithm;
description
"Encrypt message with AES algorithm in GCM mode with a key
length of 128 bits; it can also be used for generating MAC";
reference
"RFC 4106:
The Use of Galois/Counter Mode (GCM) in IPsec Encapsulating
Security Payload (ESP)";
}
Watsen & Wang Expires October 31, 2019 [Page 15]
Internet-Draft Common YANG Data Types for Cryptography April 2019
identity chacha20-poly1305 {
base encryption-and-mac-algorithm;
description
"Encrypt message with chacha20 algorithm and generate MAC with
POLY1305; it can also be used for generating MAC";
reference
"RFC 8439: ChaCha20 and Poly1305 for IETF Protocols";
}
/******************************************/
/* Identities for signature algorithm */
/******************************************/
identity signature-algorithm {
description
"A base identity for asymmetric key encryption algorithm.";
}
identity dsa-sha1 {
base signature-algorithm;
description
"The signature algorithm using DSA algorithm with SHA1 hash
algorithm";
reference
"RFC 4253: The Secure Shell (SSH) Transport Layer Protocol";
}
identity rsassa-pkcs1-sha1 {
base signature-algorithm;
description
"The signature algorithm using RSASSA-PKCS1-v1_5 with the SHA1
hash algorithm.";
reference
"RFC 4253: The Secure Shell (SSH) Transport Layer Protocol";
}
identity rsassa-pkcs1-sha256 {
base signature-algorithm;
description
"The signature algorithm using RSASSA-PKCS1-v1_5 with the
SHA256 hash algorithm.";
reference
"RFC 8332:
Use of RSA Keys with SHA-256 and SHA-512 in the Secure Shell
(SSH) Protocol
RFC 8446:
The Transport Layer Security (TLS) Protocol Version 1.3";
}
Watsen & Wang Expires October 31, 2019 [Page 16]
Internet-Draft Common YANG Data Types for Cryptography April 2019
identity rsassa-pkcs1-sha384 {
base signature-algorithm;
description
"The signature algorithm using RSASSA-PKCS1-v1_5 with the
SHA384 hash algorithm.";
reference
"RFC 8446:
The Transport Layer Security (TLS) Protocol Version 1.3";
}
identity rsassa-pkcs1-sha512 {
base signature-algorithm;
description
"The signature algorithm using RSASSA-PKCS1-v1_5 with the
SHA512 hash algorithm.";
reference
"RFC 8332:
Use of RSA Keys with SHA-256 and SHA-512 in the Secure Shell
(SSH) Protocol
RFC 8446:
The Transport Layer Security (TLS) Protocol Version 1.3";
}
identity rsassa-pss-rsae-sha256 {
base signature-algorithm;
description
"The signature algorithm using RSASSA-PSS with mask generation
function 1 and SHA256 hash algorithm. If the public key is
carried in an X.509 certificate, it MUST use the rsaEncryption
OID";
reference
"RFC 8446:
The Transport Layer Security (TLS) Protocol Version 1.3";
}
identity rsassa-pss-rsae-sha384 {
base signature-algorithm;
description
"The signature algorithm using RSASSA-PSS with mask generation
function 1 and SHA384 hash algorithm. If the public key is
carried in an X.509 certificate, it MUST use the rsaEncryption
OID";
reference
"RFC 8446:
The Transport Layer Security (TLS) Protocol Version 1.3";
}
identity rsassa-pss-rsae-sha512 {
Watsen & Wang Expires October 31, 2019 [Page 17]
Internet-Draft Common YANG Data Types for Cryptography April 2019
base signature-algorithm;
description
"The signature algorithm using RSASSA-PSS with mask generation
function 1 and SHA512 hash algorithm. If the public key is
carried in an X.509 certificate, it MUST use the rsaEncryption
OID";
reference
"RFC 8446:
The Transport Layer Security (TLS) Protocol Version 1.3";
}
identity rsassa-pss-pss-sha256 {
base signature-algorithm;
description
"The signature algorithm using RSASSA-PSS with mask generation
function 1 and SHA256 hash algorithm. If the public key is
carried in an X.509 certificate, it MUST use the RSASSA-PSS
OID";
reference
"RFC 8446:
The Transport Layer Security (TLS) Protocol Version 1.3";
}
identity rsassa-pss-pss-sha384 {
base signature-algorithm;
description
"The signature algorithm using RSASSA-PSS with mask generation
function 1 and SHA256 hash algorithm. If the public key is
carried in an X.509 certificate, it MUST use the RSASSA-PSS
OID";
reference
"RFC 8446:
The Transport Layer Security (TLS) Protocol Version 1.3";
}
identity rsassa-pss-pss-sha512 {
base signature-algorithm;
description
"The signature algorithm using RSASSA-PSS with mask generation
function 1 and SHA256 hash algorithm. If the public key is
carried in an X.509 certificate, it MUST use the RSASSA-PSS
OID";
reference
"RFC 8446:
The Transport Layer Security (TLS) Protocol Version 1.3";
}
identity ecdsa-secp256r1-sha256 {
Watsen & Wang Expires October 31, 2019 [Page 18]
Internet-Draft Common YANG Data Types for Cryptography April 2019
base signature-algorithm;
description
"The signature algorithm using ECDSA with curve name secp256r1
and SHA256 hash algorithm.";
reference
"RFC 5656: Elliptic Curve Algorithm Integration in the
Secure Shell Transport Layer
RFC 8446:
The Transport Layer Security (TLS) Protocol Version 1.3";
}
identity ecdsa-secp384r1-sha384 {
base signature-algorithm;
description
"The signature algorithm using ECDSA with curve name secp384r1
and SHA384 hash algorithm.";
reference
"RFC 5656: Elliptic Curve Algorithm Integration in the
Secure Shell Transport Layer
RFC 8446:
The Transport Layer Security (TLS) Protocol Version 1.3";
}
identity ecdsa-secp521r1-sha512 {
base signature-algorithm;
description
"The signature algorithm using ECDSA with curve name secp521r1
and SHA512 hash algorithm.";
reference
"RFC 5656: Elliptic Curve Algorithm Integration in the
Secure Shell Transport Layer
RFC 8446:
The Transport Layer Security (TLS) Protocol Version 1.3";
}
identity ed25519 {
base signature-algorithm;
description
"The signature algorithm using EdDSA as defined in RFC 8032 or
its successors.";
reference
"RFC 8032: Edwards-Curve Digital Signature Algorithm (EdDSA)";
}
identity ed448 {
base signature-algorithm;
description
"The signature algorithm using EdDSA as defined in RFC 8032 or
Watsen & Wang Expires October 31, 2019 [Page 19]
Internet-Draft Common YANG Data Types for Cryptography April 2019
its successors.";
reference
"RFC 8032: Edwards-Curve Digital Signature Algorithm (EdDSA)";
}
identity eccsi {
base signature-algorithm;
description
"The signature algorithm using ECCSI signature as defined in
RFC 6507.";
reference
"RFC 6507:
Elliptic Curve-Based Certificateless Signatures for
Identity-based Encryption (ECCSI)";
}
/**********************************************/
/* Identities for key exchange algorithms */
/**********************************************/
identity key-exchange-algorithm {
description
"A base identity for Diffie-Hellman based key exchange
algorithm.";
}
identity psk-only {
base key-exchange-algorithm;
description
"Using Pre-shared key for authentication and key exchange";
reference
"RFC 4279:
Pre-Shared Key cipher suites for Transport Layer Security
(TLS)";
}
identity dhe-ffdhe2048 {
base key-exchange-algorithm;
description
"Ephemeral Diffie Hellman key exchange with 2048 bit
finite field";
reference
"RFC 7919:
Negotiated Finite Field Diffie-Hellman Ephemeral Parameters
for Transport Layer Security (TLS)";
}
identity dhe-ffdhe3072 {
Watsen & Wang Expires October 31, 2019 [Page 20]
Internet-Draft Common YANG Data Types for Cryptography April 2019
base key-exchange-algorithm;
description
"Ephemeral Diffie Hellman key exchange with 3072 bit finite
field";
reference
"RFC 7919:
Negotiated Finite Field Diffie-Hellman Ephemeral Parameters
for Transport Layer Security (TLS)";
}
identity dhe-ffdhe4096 {
base key-exchange-algorithm;
description
"Ephemeral Diffie Hellman key exchange with 4096 bit
finite field";
reference
"RFC 7919:
Negotiated Finite Field Diffie-Hellman Ephemeral Parameters
for Transport Layer Security (TLS)";
}
identity dhe-ffdhe6144 {
base key-exchange-algorithm;
description
"Ephemeral Diffie Hellman key exchange with 6144 bit
finite field";
reference
"RFC 7919:
Negotiated Finite Field Diffie-Hellman Ephemeral Parameters
for Transport Layer Security (TLS)";
}
identity dhe-ffdhe8192 {
base key-exchange-algorithm;
description
"Ephemeral Diffie Hellman key exchange with 8192 bit
finite field";
reference
"RFC 7919:
Negotiated Finite Field Diffie-Hellman Ephemeral Parameters
for Transport Layer Security (TLS)";
}
identity psk-dhe-ffdhe2048 {
base key-exchange-algorithm;
description
"Key exchange using pre-shared key with Diffie-Hellman key
generation mechanism, where the DH group is FFDHE2048";
Watsen & Wang Expires October 31, 2019 [Page 21]
Internet-Draft Common YANG Data Types for Cryptography April 2019
reference
"RFC 8446:
The Transport Layer Security (TLS) Protocol Version 1.3";
}
identity psk-dhe-ffdhe3072 {
base key-exchange-algorithm;
description
"Key exchange using pre-shared key with Diffie-Hellman key
generation mechanism, where the DH group is FFDHE3072";
reference
"RFC 8446:
The Transport Layer Security (TLS) Protocol Version 1.3";
}
identity psk-dhe-ffdhe4096 {
base key-exchange-algorithm;
description
"Key exchange using pre-shared key with Diffie-Hellman key
generation mechanism, where the DH group is FFDHE4096";
reference
"RFC 8446:
The Transport Layer Security (TLS) Protocol Version 1.3";
}
identity psk-dhe-ffdhe6144 {
base key-exchange-algorithm;
description
"Key exchange using pre-shared key with Diffie-Hellman key
generation mechanism, where the DH group is FFDHE6144";
reference
"RFC 8446:
The Transport Layer Security (TLS) Protocol Version 1.3";
}
identity psk-dhe-ffdhe8192 {
base key-exchange-algorithm;
description
"Key exchange using pre-shared key with Diffie-Hellman key
generation mechanism, where the DH group is FFDHE8192";
reference
"RFC 8446:
The Transport Layer Security (TLS) Protocol Version 1.3";
}
identity ecdhe-secp256r1 {
base key-exchange-algorithm;
description
Watsen & Wang Expires October 31, 2019 [Page 22]
Internet-Draft Common YANG Data Types for Cryptography April 2019
"Ephemeral Diffie Hellman key exchange with elliptic group
over curve secp256r1";
reference
"RFC 8422:
Elliptic Curve Cryptography (ECC) Cipher Suites for
Transport Layer Security (TLS) Versions 1.2 and Earlier";
}
identity ecdhe-secp384r1 {
base key-exchange-algorithm;
description
"Ephemeral Diffie Hellman key exchange with elliptic group
over curve secp384r1";
reference
"RFC 8422:
Elliptic Curve Cryptography (ECC) Cipher Suites for
Transport Layer Security (TLS) Versions 1.2 and Earlier";
}
identity ecdhe-secp521r1 {
base key-exchange-algorithm;
description
"Ephemeral Diffie Hellman key exchange with elliptic group
over curve secp521r1";
reference
"RFC 8422:
Elliptic Curve Cryptography (ECC) Cipher Suites for
Transport Layer Security (TLS) Versions 1.2 and Earlier";
}
identity ecdhe-x25519 {
base key-exchange-algorithm;
description
"Ephemeral Diffie Hellman key exchange with elliptic group
over curve x25519";
reference
"RFC 8422:
Elliptic Curve Cryptography (ECC) Cipher Suites for
Transport Layer Security (TLS) Versions 1.2 and Earlier";
}
identity ecdhe-x448 {
base key-exchange-algorithm;
description
"Ephemeral Diffie Hellman key exchange with elliptic group
over curve x448";
reference
"RFC 8422:
Watsen & Wang Expires October 31, 2019 [Page 23]
Internet-Draft Common YANG Data Types for Cryptography April 2019
Elliptic Curve Cryptography (ECC) Cipher Suites for
Transport Layer Security (TLS) Versions 1.2 and Earlier";
}
identity psk-ecdhe-secp256r1 {
base key-exchange-algorithm;
description
"Key exchange using pre-shared key with elliptic group-based
Ephemeral Diffie Hellman key exchange over curve secp256r1";
reference
"RFC 8446:
The Transport Layer Security (TLS) Protocol Version 1.3";
}
identity psk-ecdhe-secp384r1 {
base key-exchange-algorithm;
description
"Key exchange using pre-shared key with elliptic group-based
Ephemeral Diffie Hellman key exchange over curve secp384r1";
reference
"RFC 8446:
The Transport Layer Security (TLS) Protocol Version 1.3";
}
identity psk-ecdhe-secp521r1 {
base key-exchange-algorithm;
description
"Key exchange using pre-shared key with elliptic group-based
Ephemeral Diffie Hellman key exchange over curve secp521r1";
reference
"RFC 8446:
The Transport Layer Security (TLS) Protocol Version 1.3";
}
identity psk-ecdhe-x25519 {
base key-exchange-algorithm;
description
"Key exchange using pre-shared key with elliptic group-based
Ephemeral Diffie Hellman key exchange over curve x25519";
reference
"RFC 8446:
The Transport Layer Security (TLS) Protocol Version 1.3";
}
identity psk-ecdhe-x448 {
base key-exchange-algorithm;
description
"Key exchange using pre-shared key with elliptic group-based
Watsen & Wang Expires October 31, 2019 [Page 24]
Internet-Draft Common YANG Data Types for Cryptography April 2019
Ephemeral Diffie Hellman key exchange over curve x448";
reference
"RFC 8446:
The Transport Layer Security (TLS) Protocol Version 1.3";
}
identity diffie-hellman-group14-sha1 {
base key-exchange-algorithm;
description
"Using DH group14 and SHA1 for key exchange";
reference
"RFC 4253: The Secure Shell (SSH) Transport Layer Protocol";
}
identity diffie-hellman-group14-sha256 {
base key-exchange-algorithm;
description
"Using DH group14 and SHA256 for key exchange";
reference
"RFC 8268:
More Modular Exponentiation (MODP) Diffie-Hellman (DH)
Key Exchange (KEX) Groups for Secure Shell (SSH)";
}
identity diffie-hellman-group15-sha512 {
base key-exchange-algorithm;
description
"Using DH group15 and SHA512 for key exchange";
reference
"RFC 8268:
More Modular Exponentiation (MODP) Diffie-Hellman (DH)
Key Exchange (KEX) Groups for Secure Shell (SSH)";
}
identity diffie-hellman-group16-sha512 {
base key-exchange-algorithm;
description
"Using DH group16 and SHA512 for key exchange";
reference
"RFC 8268:
More Modular Exponentiation (MODP) Diffie-Hellman (DH)
Key Exchange (KEX) Groups for Secure Shell (SSH)";
}
identity diffie-hellman-group17-sha512 {
base key-exchange-algorithm;
description
"Using DH group17 and SHA512 for key exchange";
Watsen & Wang Expires October 31, 2019 [Page 25]
Internet-Draft Common YANG Data Types for Cryptography April 2019
reference
"RFC 8268:
More Modular Exponentiation (MODP) Diffie-Hellman (DH)
Key Exchange (KEX) Groups for Secure Shell (SSH)";
}
identity diffie-hellman-group18-sha512 {
base key-exchange-algorithm;
description
"Using DH group18 and SHA512 for key exchange";
reference
"RFC 8268:
More Modular Exponentiation (MODP) Diffie-Hellman (DH)
Key Exchange (KEX) Groups for Secure Shell (SSH)";
}
identity ecdh-sha2-secp256r1 {
base key-exchange-algorithm;
description
"Elliptic curve-based Diffie Hellman key exchange over curve
secp256r1 and using SHA2 for MAC generation";
reference
"RFC 6239: Suite B Cryptographic Suites for Secure Shell
(SSH)";
}
identity ecdh-sha2-secp384r1 {
base key-exchange-algorithm;
description
"Elliptic curve-based Diffie Hellman key exchange over curve
secp384r1 and using SHA2 for MAC generation";
reference
"RFC 6239: Suite B Cryptographic Suites for Secure Shell
(SSH)";
}
identity rsaes-oaep {
base key-exchange-algorithm;
description
"RSAES-OAEP combines the RSAEP and RSADP primitives with the
EME-OAEP encoding method";
reference
"RFC 8017:
PKCS #1: RSA Cryptography Specifications Version 2.2.";
}
identity rsaes-pkcs1-v1_5 {
base key-exchange-algorithm;
Watsen & Wang Expires October 31, 2019 [Page 26]
Internet-Draft Common YANG Data Types for Cryptography April 2019
description
" RSAES-PKCS1-v1_5 combines the RSAEP and RSADP primitives
with the EME-PKCS1-v1_5 encoding method";
reference
"RFC 8017:
PKCS #1: RSA Cryptography Specifications Version 2.2.";
}
/**********************************************************/
/* Typedefs for identityrefs to above base identities */
/**********************************************************/
typedef hash-algorithm-ref {
type identityref {
base hash-algorithm;
}
description
"This typedef enables importing modules to easily define an
identityref to the 'hash-algorithm' base identity.";
}
typedef signature-algorithm-ref {
type identityref {
base signature-algorithm;
}
description
"This typedef enables importing modules to easily define an
identityref to the 'signature-algorithm' base identity.";
}
typedef mac-algorithm-ref {
type identityref {
base mac-algorithm;
}
description
"This typedef enables importing modules to easily define an
identityref to the 'mac-algorithm' base identity.";
}
typedef encryption-algorithm-ref {
type identityref {
base encryption-algorithm;
}
description
"This typedef enables importing modules to easily define an
identityref to the 'encryption-algorithm'
base identity.";
}
Watsen & Wang Expires October 31, 2019 [Page 27]
Internet-Draft Common YANG Data Types for Cryptography April 2019
typedef encryption-and-mac-algorithm-ref {
type identityref {
base encryption-and-mac-algorithm;
}
description
"This typedef enables importing modules to easily define an
identityref to the 'encryption-and-mac-algorithm'
base identity.";
}
typedef asymmetric-key-algorithm-ref {
type identityref {
base asymmetric-key-algorithm;
}
description
"This typedef enables importing modules to easily define an
identityref to the 'asymmetric-key-algorithm'
base identity.";
}
typedef key-exchange-algorithm-ref {
type identityref {
base key-exchange-algorithm;
}
description
"This typedef enables importing modules to easily define an
identityref to the 'key-exchange-algorithm' base identity.";
}
/***************************************************/
/* Typedefs for ASN.1 structures from RFC 5280 */
/***************************************************/
typedef x509 {
type binary;
description
"A Certificate structure, as specified in RFC 5280,
encoded using ASN.1 distinguished encoding rules (DER),
as specified in ITU-T X.690.";
reference
"RFC 5280:
Internet X.509 Public Key Infrastructure Certificate
and Certificate Revocation List (CRL) Profile
ITU-T X.690:
Information technology - ASN.1 encoding rules:
Specification of Basic Encoding Rules (BER),
Canonical Encoding Rules (CER) and Distinguished
Encoding Rules (DER).";
Watsen & Wang Expires October 31, 2019 [Page 28]
Internet-Draft Common YANG Data Types for Cryptography April 2019
}
typedef crl {
type binary;
description
"A CertificateList structure, as specified in RFC 5280,
encoded using ASN.1 distinguished encoding rules (DER),
as specified in ITU-T X.690.";
reference
"RFC 5280:
Internet X.509 Public Key Infrastructure Certificate
and Certificate Revocation List (CRL) Profile
ITU-T X.690:
Information technology - ASN.1 encoding rules:
Specification of Basic Encoding Rules (BER),
Canonical Encoding Rules (CER) and Distinguished
Encoding Rules (DER).";
}
/***********************************************/
/* Typedefs for ASN.1 structures from 5652 */
/***********************************************/
typedef cms {
type binary;
description
"A ContentInfo structure, as specified in RFC 5652,
encoded using ASN.1 distinguished encoding rules (DER),
as specified in ITU-T X.690.";
reference
"RFC 5652:
Cryptographic Message Syntax (CMS)
ITU-T X.690:
Information technology - ASN.1 encoding rules:
Specification of Basic Encoding Rules (BER),
Canonical Encoding Rules (CER) and Distinguished
Encoding Rules (DER).";
}
typedef data-content-cms {
type cms;
description
"A CMS structure whose top-most content type MUST be the
data content type, as described by Section 4 in RFC 5652.";
reference
"RFC 5652: Cryptographic Message Syntax (CMS)";
}
Watsen & Wang Expires October 31, 2019 [Page 29]
Internet-Draft Common YANG Data Types for Cryptography April 2019
typedef signed-data-cms {
type cms;
description
"A CMS structure whose top-most content type MUST be the
signed-data content type, as described by Section 5 in
RFC 5652.";
reference
"RFC 5652: Cryptographic Message Syntax (CMS)";
}
typedef enveloped-data-cms {
type cms;
description
"A CMS structure whose top-most content type MUST be the
enveloped-data content type, as described by Section 6
in RFC 5652.";
reference
"RFC 5652: Cryptographic Message Syntax (CMS)";
}
typedef digested-data-cms {
type cms;
description
"A CMS structure whose top-most content type MUST be the
digested-data content type, as described by Section 7
in RFC 5652.";
reference
"RFC 5652: Cryptographic Message Syntax (CMS)";
}
typedef encrypted-data-cms {
type cms;
description
"A CMS structure whose top-most content type MUST be the
encrypted-data content type, as described by Section 8
in RFC 5652.";
reference
"RFC 5652: Cryptographic Message Syntax (CMS)";
}
typedef authenticated-data-cms {
type cms;
description
"A CMS structure whose top-most content type MUST be the
authenticated-data content type, as described by Section 9
in RFC 5652.";
reference
"RFC 5652: Cryptographic Message Syntax (CMS)";
Watsen & Wang Expires October 31, 2019 [Page 30]
Internet-Draft Common YANG Data Types for Cryptography April 2019
}
/***************************************************/
/* Typedefs for structures related to RFC 4253 */
/***************************************************/
typedef ssh-host-key {
type binary;
description
"The binary public key data for this SSH key, as
specified by RFC 4253, Section 6.6, i.e.:
string certificate or public key format
identifier
byte[n] key/certificate data.";
reference
"RFC 4253: The Secure Shell (SSH) Transport Layer
Protocol";
}
/*********************************************************/
/* Typedefs for ASN.1 structures related to RFC 5280 */
/*********************************************************/
typedef trust-anchor-cert-x509 {
type x509;
description
"A Certificate structure that MUST encode a self-signed
root certificate.";
}
typedef end-entity-cert-x509 {
type x509;
description
"A Certificate structure that MUST encode a certificate
that is neither self-signed nor having Basic constraint
CA true.";
}
/*********************************************************/
/* Typedefs for ASN.1 structures related to RFC 5652 */
/*********************************************************/
typedef trust-anchor-cert-cms {
type signed-data-cms;
description
"A CMS SignedData structure that MUST contain the chain of
X.509 certificates needed to authenticate the certificate
Watsen & Wang Expires October 31, 2019 [Page 31]
Internet-Draft Common YANG Data Types for Cryptography April 2019
presented by a client or end-entity.
The CMS MUST contain only a single chain of certificates.
The client or end-entity certificate MUST only authenticate
to last intermediate CA certificate listed in the chain.
In all cases, the chain MUST include a self-signed root
certificate. In the case where the root certificate is
itself the issuer of the client or end-entity certificate,
only one certificate is present.
This CMS structure MAY (as applicable where this type is
used) also contain suitably fresh (as defined by local
policy) revocation objects with which the device can
verify the revocation status of the certificates.
This CMS encodes the degenerate form of the SignedData
structure that is commonly used to disseminate X.509
certificates and revocation objects (RFC 5280).";
reference
"RFC 5280:
Internet X.509 Public Key Infrastructure Certificate
and Certificate Revocation List (CRL) Profile.";
}
typedef end-entity-cert-cms {
type signed-data-cms;
description
"A CMS SignedData structure that MUST contain the end
entity certificate itself, and MAY contain any number
of intermediate certificates leading up to a trust
anchor certificate. The trust anchor certificate
MAY be included as well.
The CMS MUST contain a single end entity certificate.
The CMS MUST NOT contain any spurious certificates.
This CMS structure MAY (as applicable where this type is
used) also contain suitably fresh (as defined by local
policy) revocation objects with which the device can
verify the revocation status of the certificates.
This CMS encodes the degenerate form of the SignedData
structure that is commonly used to disseminate X.509
certificates and revocation objects (RFC 5280).";
reference
"RFC 5280:
Internet X.509 Public Key Infrastructure Certificate
Watsen & Wang Expires October 31, 2019 [Page 32]
Internet-Draft Common YANG Data Types for Cryptography April 2019
and Certificate Revocation List (CRL) Profile.";
}
/**********************************************/
/* Groupings for keys and/or certificates */
/**********************************************/
grouping public-key-grouping {
description
"A public key.
The 'algorithm' and 'public-key' nodes are not
mandatory because they MAY be defined in <operational>.
Implementations SHOULD assert that these values are
either configured or that they exist in <operational>.";
leaf algorithm {
nacm:default-deny-write;
type asymmetric-key-algorithm-ref;
must '../public-key';
description
"Identifies the key's algorithm. More specifically,
this leaf specifies how the 'public-key' binary leaf
is encoded.";
reference
"RFC CCCC: Common YANG Data Types for Cryptography";
}
leaf public-key {
nacm:default-deny-write;
type binary;
must '../algorithm';
description
"A binary that contains the value of the public key. The
interpretation of the content is defined by the key
algorithm. For example, a DSA key is an integer, an RSA
key is represented as RSAPublicKey as defined in
RFC 8017, and an Elliptic Curve Cryptography (ECC) key
is represented using the 'publicKey' described in
RFC 5915.";
reference
"RFC 8017: Public-Key Cryptography Standards (PKCS) #1:
RSA Cryptography Specifications Version 2.2.
RFC 5915: Elliptic Curve Private Key Structure.";
}
}
grouping asymmetric-key-pair-grouping {
description
"A private/public key pair.
Watsen & Wang Expires October 31, 2019 [Page 33]
Internet-Draft Common YANG Data Types for Cryptography April 2019
The 'algorithm', 'public-key', and 'private-key' nodes are
not mandatory because they MAY be defined in <operational>.
Implementations SHOULD assert that these values are either
configured or that they exist in <operational>.";
uses public-key-grouping;
leaf private-key {
nacm:default-deny-all;
type union {
type binary;
type enumeration {
enum permanently-hidden {
description
"The private key is inaccessible due to being
protected by the system (e.g., a cryptographic
hardware module).
How such keys are backed-up and restored, if
at all, is implementation specific.
Servers MUST fail any attempt by a client to
configure this value directly. This value is
not set by clients, but rather is set by the
'generate-hidden-key' and 'install-hidden-key'
actions.";
}
}
}
must '../public-key';
description
"A binary that contains the value of the private key. The
interpretation of the content is defined by the key
algorithm. For example, a DSA key is an integer, an RSA
key is represented as RSAPrivateKey as defined in
RFC 8017, and an Elliptic Curve Cryptography (ECC) key
is represented as ECPrivateKey as defined in RFC 5915.";
reference
"RFC 8017: Public-Key Cryptography Standards (PKCS) #1:
RSA Cryptography Specifications Version 2.2.
RFC 5915: Elliptic Curve Private Key Structure.";
} // private-key
action generate-hidden-key {
nacm:default-deny-all;
description
"Requests the device to generate a hidden key using the
specified asymmetric key algorithm. This action is
used to request the system to generate a key that is
'permanently-hidden', perhaps protected by a cryptographic
Watsen & Wang Expires October 31, 2019 [Page 34]
Internet-Draft Common YANG Data Types for Cryptography April 2019
hardware module. The resulting asymmetric key values are
considered operational state and hence present only in
<operational> and bound to the lifetime of the parent
'config true' node. Subsequent invocations of this or
the 'install-hidden-key' action are denied with error-tag
'data-exists'.";
input {
leaf algorithm {
type asymmetric-key-algorithm-ref;
mandatory true;
description
"The algorithm to be used when generating the
asymmetric key.";
reference
"RFC CCCC: Common YANG Data Types for Cryptography";
}
}
} // generate-hidden-key
action install-hidden-key {
nacm:default-deny-all;
description
"Requests the device to load the specified values into
a hidden key. The resulting asymmetric key values are
considered operational state and hence present only in
<operational> and bound to the lifetime of the parent
'config true' node. Subsequent invocations of this
or the 'generate-hidden-key' action are denied with
error-tag 'data-exists'.";
input {
leaf algorithm {
type asymmetric-key-algorithm-ref;
mandatory true;
description
"The algorithm to be used when generating the
asymmetric key.";
reference
"RFC CCCC: Common YANG Data Types for Cryptography";
}
leaf public-key {
type binary;
description
"A binary that contains the value of the public key.
The interpretation of the content is defined by the key
algorithm. For example, a DSA key is an integer, an
RSA key is represented as RSAPublicKey as defined in
RFC 8017, and an Elliptic Curve Cryptography (ECC) key
is represented using the 'publicKey' described in
Watsen & Wang Expires October 31, 2019 [Page 35]
Internet-Draft Common YANG Data Types for Cryptography April 2019
RFC 5915.";
reference
"RFC 8017: Public-Key Cryptography Standards (PKCS) #1:
RSA Cryptography Specifications Version 2.2.
RFC 5915: Elliptic Curve Private Key Structure.";
}
leaf private-key {
type binary;
description
"A binary that contains the value of the private key.
The interpretation of the content is defined by the key
algorithm. For example, a DSA key is an integer, an RSA
key is represented as RSAPrivateKey as defined in
RFC 8017, and an Elliptic Curve Cryptography (ECC) key
is represented as ECPrivateKey as defined in RFC 5915.";
reference
"RFC 8017: Public-Key Cryptography Standards (PKCS) #1:
RSA Cryptography Specifications Version 2.2.
RFC 5915: Elliptic Curve Private Key Structure.";
}
}
} // install-hidden-key
} // asymmetric-key-pair-grouping
grouping trust-anchor-cert-grouping {
description
"A trust anchor certificate, and a notification for when
it is about to (or already has) expire.";
leaf cert {
nacm:default-deny-write;
type trust-anchor-cert-cms;
description
"The binary certificate data for this certificate.";
reference
"RFC YYYY: Common YANG Data Types for Cryptography";
}
notification certificate-expiration {
description
"A notification indicating that the configured certificate
is either about to expire or has already expired. When to
send notifications is an implementation specific decision,
but it is RECOMMENDED that a notification be sent once a
month for 3 months, then once a week for four weeks, and
then once a day thereafter until the issue is resolved.";
leaf expiration-date {
type yang:date-and-time;
mandatory true;
Watsen & Wang Expires October 31, 2019 [Page 36]
Internet-Draft Common YANG Data Types for Cryptography April 2019
description
"Identifies the expiration date on the certificate.";
}
}
}
grouping trust-anchor-certs-grouping {
description
"A list of trust anchor certificates, and a notification
for when one is about to (or already has) expire.";
leaf-list cert {
nacm:default-deny-write;
type trust-anchor-cert-cms;
description
"The binary certificate data for this certificate.";
reference
"RFC YYYY: Common YANG Data Types for Cryptography";
}
notification certificate-expiration {
description
"A notification indicating that the configured certificate
is either about to expire or has already expired. When to
send notifications is an implementation specific decision,
but it is RECOMMENDED that a notification be sent once a
month for 3 months, then once a week for four weeks, and
then once a day thereafter until the issue is resolved.";
leaf expiration-date {
type yang:date-and-time;
mandatory true;
description
"Identifies the expiration date on the certificate.";
}
}
}
grouping end-entity-cert-grouping {
description
"An end entity certificate, and a notification for when
it is about to (or already has) expire.";
leaf cert {
nacm:default-deny-write;
type end-entity-cert-cms;
description
"The binary certificate data for this certificate.";
reference
"RFC YYYY: Common YANG Data Types for Cryptography";
}
notification certificate-expiration {
Watsen & Wang Expires October 31, 2019 [Page 37]
Internet-Draft Common YANG Data Types for Cryptography April 2019
description
"A notification indicating that the configured certificate
is either about to expire or has already expired. When to
send notifications is an implementation specific decision,
but it is RECOMMENDED that a notification be sent once a
month for 3 months, then once a week for four weeks, and
then once a day thereafter until the issue is resolved.";
leaf expiration-date {
type yang:date-and-time;
mandatory true;
description
"Identifies the expiration date on the certificate.";
}
}
}
grouping end-entity-certs-grouping {
description
"A list of end entity certificates, and a notification for
when one is about to (or already has) expire.";
leaf-list cert {
nacm:default-deny-write;
type end-entity-cert-cms;
description
"The binary certificate data for this certificate.";
reference
"RFC YYYY: Common YANG Data Types for Cryptography";
}
notification certificate-expiration {
description
"A notification indicating that the configured certificate
is either about to expire or has already expired. When to
send notifications is an implementation specific decision,
but it is RECOMMENDED that a notification be sent once a
month for 3 months, then once a week for four weeks, and
then once a day thereafter until the issue is resolved.";
leaf expiration-date {
type yang:date-and-time;
mandatory true;
description
"Identifies the expiration date on the certificate.";
}
}
}
grouping asymmetric-key-pair-with-cert-grouping {
description
"A private/public key pair and an associated certificate.";
Watsen & Wang Expires October 31, 2019 [Page 38]
Internet-Draft Common YANG Data Types for Cryptography April 2019
uses asymmetric-key-pair-grouping;
uses end-entity-cert-grouping;
action generate-certificate-signing-request {
nacm:default-deny-all;
description
"Generates a certificate signing request structure for
the associated asymmetric key using the passed subject
and attribute values. The specified assertions need
to be appropriate for the certificate's use. For
example, an entity certificate for a TLS server
SHOULD have values that enable clients to satisfy
RFC 6125 processing.";
input {
leaf subject {
type binary;
mandatory true;
description
"The 'subject' field per the CertificationRequestInfo
structure as specified by RFC 2986, Section 4.1
encoded using the ASN.1 distinguished encoding
rules (DER), as specified in ITU-T X.690.";
reference
"RFC 2986:
PKCS #10: Certification Request Syntax
Specification Version 1.7.
ITU-T X.690:
Information technology - ASN.1 encoding rules:
Specification of Basic Encoding Rules (BER),
Canonical Encoding Rules (CER) and Distinguished
Encoding Rules (DER).";
}
leaf attributes {
type binary;
description
"The 'attributes' field from the structure
CertificationRequestInfo as specified by RFC 2986,
Section 4.1 encoded using the ASN.1 distinguished
encoding rules (DER), as specified in ITU-T X.690.";
reference
"RFC 2986:
PKCS #10: Certification Request Syntax
Specification Version 1.7.
ITU-T X.690:
Information technology - ASN.1 encoding rules:
Specification of Basic Encoding Rules (BER),
Canonical Encoding Rules (CER) and Distinguished
Encoding Rules (DER).";
Watsen & Wang Expires October 31, 2019 [Page 39]
Internet-Draft Common YANG Data Types for Cryptography April 2019
}
}
output {
leaf certificate-signing-request {
type binary;
mandatory true;
description
"A CertificationRequest structure as specified by
RFC 2986, Section 4.2 encoded using the ASN.1
distinguished encoding rules (DER), as specified
in ITU-T X.690.";
reference
"RFC 2986:
PKCS #10: Certification Request Syntax
Specification Version 1.7.
ITU-T X.690:
Information technology - ASN.1 encoding rules:
Specification of Basic Encoding Rules (BER),
Canonical Encoding Rules (CER) and Distinguished
Encoding Rules (DER).";
}
}
} // generate-certificate-signing-request
} // asymmetric-key-pair-with-cert-grouping
grouping asymmetric-key-pair-with-certs-grouping {
description
"A private/public key pair and associated certificates.";
uses asymmetric-key-pair-grouping;
container certificates {
nacm:default-deny-write;
description
"Certificates associated with this asymmetric key.
More than one certificate supports, for instance,
a TPM-protected asymmetric key that has both IDevID
and LDevID certificates associated.";
list certificate {
key "name";
description
"A certificate for this asymmetric key.";
leaf name {
type string;
description
"An arbitrary name for the certificate. If the name
matches the name of a certificate that exists
independently in <operational> (i.e., an IDevID),
then the 'cert' node MUST NOT be configured.";
Watsen & Wang Expires October 31, 2019 [Page 40]
Internet-Draft Common YANG Data Types for Cryptography April 2019
}
uses end-entity-cert-grouping;
}
} // certificates
action generate-certificate-signing-request {
nacm:default-deny-all;
description
"Generates a certificate signing request structure for
the associated asymmetric key using the passed subject
and attribute values. The specified assertions need
to be appropriate for the certificate's use. For
example, an entity certificate for a TLS server
SHOULD have values that enable clients to satisfy
RFC 6125 processing.";
input {
leaf subject {
type binary;
mandatory true;
description
"The 'subject' field per the CertificationRequestInfo
structure as specified by RFC 2986, Section 4.1
encoded using the ASN.1 distinguished encoding
rules (DER), as specified in ITU-T X.690.";
reference
"RFC 2986:
PKCS #10: Certification Request Syntax
Specification Version 1.7.
ITU-T X.690:
Information technology - ASN.1 encoding rules:
Specification of Basic Encoding Rules (BER),
Canonical Encoding Rules (CER) and Distinguished
Encoding Rules (DER).";
}
leaf attributes {
type binary;
description
"The 'attributes' field from the structure
CertificationRequestInfo as specified by RFC 2986,
Section 4.1 encoded using the ASN.1 distinguished
encoding rules (DER), as specified in ITU-T X.690.";
reference
"RFC 2986:
PKCS #10: Certification Request Syntax
Specification Version 1.7.
ITU-T X.690:
Information technology - ASN.1 encoding rules:
Specification of Basic Encoding Rules (BER),
Watsen & Wang Expires October 31, 2019 [Page 41]
Internet-Draft Common YANG Data Types for Cryptography April 2019
Canonical Encoding Rules (CER) and Distinguished
Encoding Rules (DER).";
}
}
output {
leaf certificate-signing-request {
type binary;
mandatory true;
description
"A CertificationRequest structure as specified by
RFC 2986, Section 4.2 encoded using the ASN.1
distinguished encoding rules (DER), as specified
in ITU-T X.690.";
reference
"RFC 2986:
PKCS #10: Certification Request Syntax
Specification Version 1.7.
ITU-T X.690:
Information technology - ASN.1 encoding rules:
Specification of Basic Encoding Rules (BER),
Canonical Encoding Rules (CER) and Distinguished
Encoding Rules (DER).";
}
}
} // generate-certificate-signing-request
} // asymmetric-key-pair-with-certs-grouping
}
<CODE ENDS>
3. Security Considerations
3.1. Support for Algorithms
In order to use YANG identities for algorithm identifiers, only the
most commonly used RSA key lengths are supported for the RSA
algorithm. Additional key lengths can be defined in another module
or added into a future version of this document.
This document limits the number of elliptical curves supported. This
was done to match industry trends and IETF best practice (e.g.,
matching work being done in TLS 1.3). If additional algorithms are
needed, they can be defined by another module or added into a future
version of this document.
Watsen & Wang Expires October 31, 2019 [Page 42]
Internet-Draft Common YANG Data Types for Cryptography April 2019
3.2. No Support for CRMF
This document uses PKCS #10 [RFC2986] for the "generate-certificate-
signing-request" action. The use of Certificate Request Message
Format (CRMF) [RFC4211] was considered, but is was unclear if there
was market demand for it. If it is desired to support CRMF in the
future, a backwards compatible solution can be defined at that time.
3.3. Access to Data Nodes
The YANG module in this document defines "grouping" statements that
are designed to be accessed via YANG based management protocols, such
as NETCONF [RFC6241] and RESTCONF [RFC8040]. Both of these protocols
have mandatory-to-implement secure transport layers (e.g., SSH, TLS)
with mutual authentication.
The NETCONF access control model (NACM) [RFC8341] provides the means
to restrict access for particular users to a pre-configured subset of
all available protocol operations and content.
Since the module in this document only define groupings, these
considerations are primarily for the designers of other modules that
use these groupings.
There are a number of data nodes defined by the grouping statements
that are writable/creatable/deletable (i.e., config true, which is
the default). Some of these data nodes may be considered sensitive
or vulnerable in some network environments. Write operations (e.g.,
edit-config) to these data nodes without proper protection can have a
negative effect on network operations. These are the subtrees and
data nodes and their sensitivity/vulnerability:
*: All of the data nodes defined by all the groupings are
considered sensitive to write operations. For instance, the
modification of a public key or a certificate can dramatically
alter the implemented security policy. For this reason, the
NACM extension "default-deny-write" has been applied to all the
data nodes defined by all the groupings.
Some of the readable data nodes in the YANG module may be considered
sensitive or vulnerable in some network environments. It is thus
important to control read access (e.g., via get, get-config, or
notification) to these data nodes. These are the subtrees and data
nodes and their sensitivity/vulnerability:
/private-key: The "private-key" node defined in the "asymmetric-
key-pair-grouping" grouping is additionally sensitive to read
operations such that, in normal use cases, it should never be
Watsen & Wang Expires October 31, 2019 [Page 43]
Internet-Draft Common YANG Data Types for Cryptography April 2019
returned to a client. For this reason, the NACM extension
"default-deny-all" has been applied to it here.
Some of the operations in this YANG module may be considered
sensitive or vulnerable in some network environments. It is thus
important to control access to these operations. These are the
operations and their sensitivity/vulnerability:
*: All of the "action" statements defined by groupings SHOULD only
be executed by authorized users. For this reason, the NACM
extension "default-deny-all" has been applied to all of them.
Note that NACM uses "default-deny-all" to protect "RPC" and
"action" statements; it does not define, e.g., an extension
called "default-deny-execute".
generate-certificate-signing-request: For this action, it is
RECOMMENDED that implementations assert channel binding
[RFC5056], so as to ensure that the application layer that sent
the request is the same as the device authenticated when the
secure transport layer was established.
4. IANA Considerations
4.1. The IETF XML Registry
This document registers one URI in the "ns" subregistry of the IETF
XML Registry [RFC3688]. Following the format in [RFC3688], the
following registration is requested:
URI: urn:ietf:params:xml:ns:yang:ietf-crypto-types
Registrant Contact: The NETCONF WG of the IETF.
XML: N/A, the requested URI is an XML namespace.
4.2. The YANG Module Names Registry
This document registers one YANG module in the YANG Module Names
registry [RFC6020]. Following the format in [RFC6020], the the
following registration is requested:
name: ietf-crypto-types
namespace: urn:ietf:params:xml:ns:yang:ietf-crypto-types
prefix: ct
reference: RFC XXXX
Watsen & Wang Expires October 31, 2019 [Page 44]
Internet-Draft Common YANG Data Types for Cryptography April 2019
5. References
5.1. Normative References
[ITU.X690.2015]
International Telecommunication Union, "Information
Technology - ASN.1 encoding rules: Specification of Basic
Encoding Rules (BER), Canonical Encoding Rules (CER) and
Distinguished Encoding Rules (DER)", ITU-T Recommendation
X.690, ISO/IEC 8825-1, August 2015,
<https://www.itu.int/rec/T-REC-X.690/>.
[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>.
[RFC2404] Madson, C. and R. Glenn, "The Use of HMAC-SHA-1-96 within
ESP and AH", RFC 2404, DOI 10.17487/RFC2404, November
1998, <https://www.rfc-editor.org/info/rfc2404>.
[RFC3565] Schaad, J., "Use of the Advanced Encryption Standard (AES)
Encryption Algorithm in Cryptographic Message Syntax
(CMS)", RFC 3565, DOI 10.17487/RFC3565, July 2003,
<https://www.rfc-editor.org/info/rfc3565>.
[RFC3686] Housley, R., "Using Advanced Encryption Standard (AES)
Counter Mode With IPsec Encapsulating Security Payload
(ESP)", RFC 3686, DOI 10.17487/RFC3686, January 2004,
<https://www.rfc-editor.org/info/rfc3686>.
[RFC4106] Viega, J. and D. McGrew, "The Use of Galois/Counter Mode
(GCM) in IPsec Encapsulating Security Payload (ESP)",
RFC 4106, DOI 10.17487/RFC4106, June 2005,
<https://www.rfc-editor.org/info/rfc4106>.
[RFC4253] Ylonen, T. and C. Lonvick, Ed., "The Secure Shell (SSH)
Transport Layer Protocol", RFC 4253, DOI 10.17487/RFC4253,
January 2006, <https://www.rfc-editor.org/info/rfc4253>.
[RFC4279] Eronen, P., Ed. and H. Tschofenig, Ed., "Pre-Shared Key
Ciphersuites for Transport Layer Security (TLS)",
RFC 4279, DOI 10.17487/RFC4279, December 2005,
<https://www.rfc-editor.org/info/rfc4279>.
Watsen & Wang Expires October 31, 2019 [Page 45]
Internet-Draft Common YANG Data Types for Cryptography April 2019
[RFC4309] Housley, R., "Using Advanced Encryption Standard (AES) CCM
Mode with IPsec Encapsulating Security Payload (ESP)",
RFC 4309, DOI 10.17487/RFC4309, December 2005,
<https://www.rfc-editor.org/info/rfc4309>.
[RFC4494] Song, JH., Poovendran, R., and J. Lee, "The AES-CMAC-96
Algorithm and Its Use with IPsec", RFC 4494,
DOI 10.17487/RFC4494, June 2006,
<https://www.rfc-editor.org/info/rfc4494>.
[RFC4543] McGrew, D. and J. Viega, "The Use of Galois Message
Authentication Code (GMAC) in IPsec ESP and AH", RFC 4543,
DOI 10.17487/RFC4543, May 2006,
<https://www.rfc-editor.org/info/rfc4543>.
[RFC4868] Kelly, S. and S. Frankel, "Using HMAC-SHA-256, HMAC-SHA-
384, and HMAC-SHA-512 with IPsec", RFC 4868,
DOI 10.17487/RFC4868, May 2007,
<https://www.rfc-editor.org/info/rfc4868>.
[RFC5280] Cooper, D., Santesson, S., Farrell, S., Boeyen, S.,
Housley, R., and W. Polk, "Internet X.509 Public Key
Infrastructure Certificate and Certificate Revocation List
(CRL) Profile", RFC 5280, DOI 10.17487/RFC5280, May 2008,
<https://www.rfc-editor.org/info/rfc5280>.
[RFC5652] Housley, R., "Cryptographic Message Syntax (CMS)", STD 70,
RFC 5652, DOI 10.17487/RFC5652, September 2009,
<https://www.rfc-editor.org/info/rfc5652>.
[RFC5656] Stebila, D. and J. Green, "Elliptic Curve Algorithm
Integration in the Secure Shell Transport Layer",
RFC 5656, DOI 10.17487/RFC5656, December 2009,
<https://www.rfc-editor.org/info/rfc5656>.
[RFC6187] Igoe, K. and D. Stebila, "X.509v3 Certificates for Secure
Shell Authentication", RFC 6187, DOI 10.17487/RFC6187,
March 2011, <https://www.rfc-editor.org/info/rfc6187>.
[RFC6991] Schoenwaelder, J., Ed., "Common YANG Data Types",
RFC 6991, DOI 10.17487/RFC6991, July 2013,
<https://www.rfc-editor.org/info/rfc6991>.
[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>.
Watsen & Wang Expires October 31, 2019 [Page 46]
Internet-Draft Common YANG Data Types for Cryptography April 2019
[RFC7950] Bjorklund, M., Ed., "The YANG 1.1 Data Modeling Language",
RFC 7950, DOI 10.17487/RFC7950, August 2016,
<https://www.rfc-editor.org/info/rfc7950>.
[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>.
[RFC8268] Baushke, M., "More Modular Exponentiation (MODP) Diffie-
Hellman (DH) Key Exchange (KEX) Groups for Secure Shell
(SSH)", RFC 8268, DOI 10.17487/RFC8268, December 2017,
<https://www.rfc-editor.org/info/rfc8268>.
[RFC8332] Bider, D., "Use of RSA Keys with SHA-256 and SHA-512 in
the Secure Shell (SSH) Protocol", RFC 8332,
DOI 10.17487/RFC8332, March 2018,
<https://www.rfc-editor.org/info/rfc8332>.
[RFC8341] Bierman, A. and M. Bjorklund, "Network Configuration
Access Control Model", STD 91, RFC 8341,
DOI 10.17487/RFC8341, March 2018,
<https://www.rfc-editor.org/info/rfc8341>.
[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>.
5.2. Informative References
[RFC2986] Nystrom, M. and B. Kaliski, "PKCS #10: Certification
Request Syntax Specification Version 1.7", RFC 2986,
DOI 10.17487/RFC2986, November 2000,
<https://www.rfc-editor.org/info/rfc2986>.
[RFC3174] Eastlake 3rd, D. and P. Jones, "US Secure Hash Algorithm 1
(SHA1)", RFC 3174, DOI 10.17487/RFC3174, September 2001,
<https://www.rfc-editor.org/info/rfc3174>.
[RFC3688] Mealling, M., "The IETF XML Registry", BCP 81, RFC 3688,
DOI 10.17487/RFC3688, January 2004,
<https://www.rfc-editor.org/info/rfc3688>.
Watsen & Wang Expires October 31, 2019 [Page 47]
Internet-Draft Common YANG Data Types for Cryptography April 2019
[RFC4211] Schaad, J., "Internet X.509 Public Key Infrastructure
Certificate Request Message Format (CRMF)", RFC 4211,
DOI 10.17487/RFC4211, September 2005,
<https://www.rfc-editor.org/info/rfc4211>.
[RFC4493] Song, JH., Poovendran, R., Lee, J., and T. Iwata, "The
AES-CMAC Algorithm", RFC 4493, DOI 10.17487/RFC4493, June
2006, <https://www.rfc-editor.org/info/rfc4493>.
[RFC5056] Williams, N., "On the Use of Channel Bindings to Secure
Channels", RFC 5056, DOI 10.17487/RFC5056, November 2007,
<https://www.rfc-editor.org/info/rfc5056>.
[RFC5915] Turner, S. and D. Brown, "Elliptic Curve Private Key
Structure", RFC 5915, DOI 10.17487/RFC5915, June 2010,
<https://www.rfc-editor.org/info/rfc5915>.
[RFC6020] Bjorklund, M., Ed., "YANG - A Data Modeling Language for
the Network Configuration Protocol (NETCONF)", RFC 6020,
DOI 10.17487/RFC6020, October 2010,
<https://www.rfc-editor.org/info/rfc6020>.
[RFC6125] Saint-Andre, P. and J. Hodges, "Representation and
Verification of Domain-Based Application Service Identity
within Internet Public Key Infrastructure Using X.509
(PKIX) Certificates in the Context of Transport Layer
Security (TLS)", RFC 6125, DOI 10.17487/RFC6125, March
2011, <https://www.rfc-editor.org/info/rfc6125>.
[RFC6234] Eastlake 3rd, D. and T. Hansen, "US Secure Hash Algorithms
(SHA and SHA-based HMAC and HKDF)", RFC 6234,
DOI 10.17487/RFC6234, May 2011,
<https://www.rfc-editor.org/info/rfc6234>.
[RFC6239] Igoe, K., "Suite B Cryptographic Suites for Secure Shell
(SSH)", RFC 6239, DOI 10.17487/RFC6239, May 2011,
<https://www.rfc-editor.org/info/rfc6239>.
[RFC6241] Enns, R., Ed., Bjorklund, M., Ed., Schoenwaelder, J., Ed.,
and A. Bierman, Ed., "Network Configuration Protocol
(NETCONF)", RFC 6241, DOI 10.17487/RFC6241, June 2011,
<https://www.rfc-editor.org/info/rfc6241>.
[RFC6507] Groves, M., "Elliptic Curve-Based Certificateless
Signatures for Identity-Based Encryption (ECCSI)",
RFC 6507, DOI 10.17487/RFC6507, February 2012,
<https://www.rfc-editor.org/info/rfc6507>.
Watsen & Wang Expires October 31, 2019 [Page 48]
Internet-Draft Common YANG Data Types for Cryptography April 2019
[RFC8017] Moriarty, K., Ed., Kaliski, B., Jonsson, J., and A. Rusch,
"PKCS #1: RSA Cryptography Specifications Version 2.2",
RFC 8017, DOI 10.17487/RFC8017, November 2016,
<https://www.rfc-editor.org/info/rfc8017>.
[RFC8032] Josefsson, S. and I. Liusvaara, "Edwards-Curve Digital
Signature Algorithm (EdDSA)", RFC 8032,
DOI 10.17487/RFC8032, January 2017,
<https://www.rfc-editor.org/info/rfc8032>.
[RFC8040] Bierman, A., Bjorklund, M., and K. Watsen, "RESTCONF
Protocol", RFC 8040, DOI 10.17487/RFC8040, January 2017,
<https://www.rfc-editor.org/info/rfc8040>.
[RFC8340] Bjorklund, M. and L. Berger, Ed., "YANG Tree Diagrams",
BCP 215, RFC 8340, DOI 10.17487/RFC8340, March 2018,
<https://www.rfc-editor.org/info/rfc8340>.
[RFC8439] Nir, Y. and A. Langley, "ChaCha20 and Poly1305 for IETF
Protocols", RFC 8439, DOI 10.17487/RFC8439, June 2018,
<https://www.rfc-editor.org/info/rfc8439>.
Watsen & Wang Expires October 31, 2019 [Page 49]
Internet-Draft Common YANG Data Types for Cryptography April 2019
Appendix A. Examples
A.1. The "asymmetric-key-pair-with-certs-grouping" Grouping
The following example module has been constructed to illustrate use
of the "asymmetric-key-pair-with-certs-grouping" grouping defined in
the "ietf-crypto-types" module.
Note that the "asymmetric-key-pair-with-certs-grouping" grouping uses
both the "asymmetric-key-pair-grouping" and "end-entity-cert-
grouping" groupings, and that the "asymmetric-key-pair-grouping"
grouping uses the "public-key-grouping" grouping. Thus, a total of
four of the five groupings defined in the "ietf-crypto-types" module
are illustrated through the use of this one grouping. The only
grouping not represented is the "trust-anchor-cert-grouping"
grouping.
Watsen & Wang Expires October 31, 2019 [Page 50]
Internet-Draft Common YANG Data Types for Cryptography April 2019
module ex-crypto-types-usage {
yang-version 1.1;
namespace "http://example.com/ns/example-crypto-types-usage";
prefix "ectu";
import ietf-crypto-types {
prefix ct;
reference
"RFC XXXX: Common YANG Data Types for Cryptography";
}
organization
"Example Corporation";
contact
"Author: YANG Designer <mailto:yang.designer@example.com>";
description
"This module illustrates the grouping
defined in the crypto-types draft called
'asymmetric-key-pair-with-certs-grouping'.";
revision "1001-01-01" {
description
"Initial version";
reference
"RFC ????: Usage Example for RFC XXXX";
}
container keys {
description
"A container of keys.";
list key {
key name;
leaf name {
type string;
description
"An arbitrary name for this key.";
}
uses ct:asymmetric-key-pair-with-certs-grouping;
description
"An asymmetric key pair with associated certificates.";
}
}
}
Watsen & Wang Expires October 31, 2019 [Page 51]
Internet-Draft Common YANG Data Types for Cryptography April 2019
Given the above example usage module, the following example
illustrates some configured keys.
<keys xmlns="http://example.com/ns/example-crypto-types-usage">
<key>
<name>ex-key</name>
<algorithm
xmlns:ct="urn:ietf:params:xml:ns:yang:ietf-crypto-types">
ct:rsa2048
</algorithm>
<private-key>base64encodedvalue==</private-key>
<public-key>base64encodedvalue==</public-key>
<certificates>
<certificate>
<name>ex-cert</name>
<cert>base64encodedvalue==</cert>
</certificate>
</certificates>
</key>
</keys>
A.2. The "generate-hidden-key" Action
The following example illustrates the "generate-hidden-key" action in
use with the NETCONF protocol.
REQUEST
<rpc message-id="101"
xmlns="urn:ietf:params:xml:ns:netconf:base:1.0">
<action xmlns="urn:ietf:params:xml:ns:yang:1">
<keys xmlns="http://example.com/ns/example-crypto-types-usage">
<key>
<name>empty-key</name>
<generate-hidden-key>
<algorithm
xmlns:ct="urn:ietf:params:xml:ns:yang:ietf-crypto-types">
ct:rsa2048
</algorithm>
</generate-hidden-key>
</key>
</keys>
</action>
</rpc>
Watsen & Wang Expires October 31, 2019 [Page 52]
Internet-Draft Common YANG Data Types for Cryptography April 2019
RESPONSE
<rpc-reply message-id="101"
xmlns="urn:ietf:params:xml:ns:netconf:base:1.0">
<ok/>
</rpc-reply>
A.3. The "install-hidden-key" Action
The following example illustrates the "install-hidden-key" action in
use with the NETCONF protocol.
REQUEST
<rpc message-id="101"
xmlns="urn:ietf:params:xml:ns:netconf:base:1.0">
<action xmlns="urn:ietf:params:xml:ns:yang:1">
<keys xmlns="http://example.com/ns/example-crypto-types-usage">
<key>
<name>empty-key</name>
<install-hidden-key>
<algorithm
xmlns:ct="urn:ietf:params:xml:ns:yang:ietf-crypto-types">
ct:rsa2048
</algorithm>
<public-key>base64encodedvalue==</public-key>
<private-key>base64encodedvalue==</private-key>
</install-hidden-key>
</key>
</keys>
</action>
</rpc>
RESPONSE
<rpc-reply message-id="101"
xmlns="urn:ietf:params:xml:ns:netconf:base:1.0">
<ok/>
</rpc-reply>
A.4. The "generate-certificate-signing-request" Action
The following example illustrates the "generate-certificate-signing-
request" action in use with the NETCONF protocol.
Watsen & Wang Expires October 31, 2019 [Page 53]
Internet-Draft Common YANG Data Types for Cryptography April 2019
REQUEST
<rpc message-id="101"
xmlns="urn:ietf:params:xml:ns:netconf:base:1.0">
<action xmlns="urn:ietf:params:xml:ns:yang:1">
<keys xmlns="http://example.com/ns/example-crypto-types-usage">
<key>
<name>ex-key-sect571r1</name>
<generate-certificate-signing-request>
<subject>base64encodedvalue==</subject>
<attributes>base64encodedvalue==</attributes>
</generate-certificate-signing-request>
</key>
</keys>
</action>
</rpc>
RESPONSE
<rpc-reply message-id="101"
xmlns="urn:ietf:params:xml:ns:netconf:base:1.0">
<certificate-signing-request
xmlns="http://example.com/ns/example-crypto-types-usage">
base64encodedvalue==
</certificate-signing-request>
</rpc-reply>
A.5. The "certificate-expiration" Notification
The following example illustrates the "certificate-expiration"
notification in use with the NETCONF protocol.
Watsen & Wang Expires October 31, 2019 [Page 54]
Internet-Draft Common YANG Data Types for Cryptography April 2019
<notification
xmlns="urn:ietf:params:xml:ns:netconf:notification:1.0">
<eventTime>2018-05-25T00:01:00Z</eventTime>
<keys xmlns="http://example.com/ns/example-crypto-types-usage">
<key>
<name>locally-defined key</name>
<certificates>
<certificate>
<name>my-cert</name>
<certificate-expiration>
<expiration-date>
2018-08-05T14:18:53-05:00
</expiration-date>
</certificate-expiration>
</certificate>
</certificates>
</key>
</keys>
</notification>
Appendix B. Change Log
B.1. I-D to 00
o Removed groupings and notifications.
o Added typedefs for identityrefs.
o Added typedefs for other RFC 5280 structures.
o Added typedefs for other RFC 5652 structures.
o Added convenience typedefs for RFC 4253, RFC 5280, and RFC 5652.
B.2. 00 to 01
o Moved groupings from the draft-ietf-netconf-keystore here.
B.3. 01 to 02
o Removed unwanted "mandatory" and "must" statements.
o Added many new crypto algorithms (thanks Haiguang!)
o Clarified in asymmetric-key-pair-with-certs-grouping, in
certificates/certificate/name/description, that if the name MUST
NOT match the name of a certificate that exists independently in
Watsen & Wang Expires October 31, 2019 [Page 55]
Internet-Draft Common YANG Data Types for Cryptography April 2019
<operational>, enabling certs installed by the manufacturer (e.g.,
an IDevID).
B.4. 02 to 03
o renamed base identity 'asymmetric-key-encryption-algorithm' to
'asymmetric-key-algorithm'.
o added new 'asymmetric-key-algorithm' identities for secp192r1,
secp224r1, secp256r1, secp384r1, and secp521r1.
o removed 'mac-algorithm' identities for mac-aes-128-ccm, mac-aes-
192-ccm, mac-aes-256-ccm, mac-aes-128-gcm, mac-aes-192-gcm, mac-
aes-256-gcm, and mac-chacha20-poly1305.
o for all -cbc and -ctr identities, renamed base identity
'symmetric-key-encryption-algorithm' to 'encryption-algorithm'.
o for all -ccm and -gcm identities, renamed base identity
'symmetric-key-encryption-algorithm' to 'encryption-and-mac-
algorithm' and renamed the identity to remove the "enc-" prefix.
o for all the 'signature-algorithm' based identities, renamed from
'rsa-*' to 'rsassa-*'.
o removed all of the "x509v3-" prefixed 'signature-algorithm' based
identities.
o added 'key-exchange-algorithm' based identities for 'rsaes-oaep'
and 'rsaes-pkcs1-v1_5'.
o renamed typedef 'symmetric-key-encryption-algorithm-ref' to
'symmetric-key-algorithm-ref'.
o renamed typedef 'asymmetric-key-encryption-algorithm-ref' to
'asymmetric-key-algorithm-ref'.
o added typedef 'encryption-and-mac-algorithm-ref'.
o Updated copyright date, boilerplate template, affiliation, and
folding algorithm.
B.5. 03 to 04
o ran YANG module through formatter.
Watsen & Wang Expires October 31, 2019 [Page 56]
Internet-Draft Common YANG Data Types for Cryptography April 2019
B.6. 04 to 05
o fixed broken symlink causing reformatted YANG module to not show.
B.7. 05 to 06
o Added NACM annotations.
o Updated Security Considerations section.
o Added 'asymmetric-key-pair-with-cert-grouping' grouping.
o Removed text from 'permanently-hidden' enum regarding such keys
not being backed up or restored.
o Updated the boilerplate text in module-level "description"
statement to match copyeditor convention.
o Added an explanation to the 'public-key-grouping' and 'asymmetric-
key-pair-grouping' statements as for why the nodes are not
mandatory (e.g., because they may exist only in <operational>.
o Added 'must' expressions to the 'public-key-grouping' and
'asymmetric-key-pair-grouping' statements ensuring sibling nodes
are either all exist or do not all exist.
o Added an explanation to the 'permanently-hidden' that the value
cannot be configured directly by clients and servers MUST fail any
attempt to do so.
o Added 'trust-anchor-certs-grouping' and 'end-entity-certs-
grouping' (the plural form of existing groupings).
o Now states that keys created in <operational> by the *-hidden-key
actions are bound to the lifetime of the parent 'config true'
node, and that subsequent invocations of either action results in
a failure.
Acknowledgements
The authors would like to thank for following for lively discussions
on list and in the halls (ordered by last name): Martin Bjorklund,
Balazs Kovacs, Juergen Schoenwaelder, Eric Voit, and Liang Xia.
Watsen & Wang Expires October 31, 2019 [Page 57]
Internet-Draft Common YANG Data Types for Cryptography April 2019
Authors' Addresses
Kent Watsen
Watsen Networks
EMail: kent+ietf@watsen.net
Wang Haiguang
Huawei
EMail: wang.haiguang.shieldlab@huawei.com
Watsen & Wang Expires October 31, 2019 [Page 58]
