Test Vectors for Session Traversal Utilities for NAT (STUN)
draft-ietf-behave-stun-test-vectors-04

Behavior Engineering for Hindrance                     R. Denis-Courmont
Avoidance                                                          Nokia
Internet-Draft                                         November 18, 2008
Intended status: Informational
Expires: May 22, 2009

                         Test vectors for STUN
                 draft-ietf-behave-stun-test-vectors-04

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Abstract

   The Session Traversal Utilities for NAT (STUN) protocol defines
   several STUN attributes.  The content of some of these --
   FINGERPRINT, MESSAGE-INTEGRITY and XOR-MAPPED-ADDRESS -- involve
   binary-logical operations (hashing, xor).  This document provides
   test vectors for those attributes.

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . . . 3
   2.  Test vectors  . . . . . . . . . . . . . . . . . . . . . . . . . 3
     2.1.  Sample request  . . . . . . . . . . . . . . . . . . . . . . 3
     2.2.  Sample IPv4 response  . . . . . . . . . . . . . . . . . . . 4
     2.3.  Sample IPv6 response  . . . . . . . . . . . . . . . . . . . 5
     2.4.  Sample request with long-term authentication  . . . . . . . 6
   3.  Security Considerations . . . . . . . . . . . . . . . . . . . . 7
   4.  IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 7
   5.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . . . 7
   6.  References  . . . . . . . . . . . . . . . . . . . . . . . . . . 8
     6.1.  Normative References  . . . . . . . . . . . . . . . . . . . 8
     6.2.  Informative References  . . . . . . . . . . . . . . . . . . 8
   Appendix A.  Source code for test vectors . . . . . . . . . . . . . 8

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1.  Introduction

   The Session Traversal Utilities for NAT (STUN)[RFC5389] protocol
   defines two different hashes that may be included in messages
   exchanged by peers implementing that protocol:

   FINGERPRINT attribute:  a 32-bits Circular Redundancy Check.

   MESSAGE-INTEGRITY attribute:  a HMAC-SHA1[RFC2104] authentication
      code.

   This document provides samples of properly-formatted STUN messages
   including these hashes, for the sake of testing implementations of
   the STUN protocol.

2.  Test vectors

   All included vectors are represented as a series of hexadecimal
   values in network byte order.  Each pair of hexadecimal digits
   represents one byte.

   Messages follow the ICE Connectivity Checks use case of STUN, (see
   [I-D.ietf-mmusic-ice]).  These messages include FINGERPRINT, MESSAGE-
   INTEGRITY and XOR-MAPPED-ADDRESS STUN attributes.  These attributes
   are considered to be most prone to implementation errors.  An
   additional message is provided to test STUN authentication with long-
   term credentials (which is not used by ICE).

   In the following sample messages, two types of plain UTF-8 text
   attributes are included.  The values of certain of these attributes
   were purposedly sized to require padding.  Non-ASCII characters are
   represented as <U+xxxx> where xxxx is the hexadecimal number of their
   Unicode code point.

   In this document, ASCII white spaces (U+0020) are used for padding
   within the first three messages - this is arbitrary.  Similarly, the
   last message uses nul bytes for padding.  As per [RFC5389], padding
   bytes may take any value.

2.1.  Sample request

   This request uses the following parameters:

   Software name:  "STUN test client" (without quotes)

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   Username:  "evtj:h6vY" (without quotes)

   Password:  "VOkJxbRl1RmTxUk/WvJxBt" (without quotes)

          00 01 00 58     Request type and message length
          21 12 a4 42     Magic cookie
          b7 e7 a7 01  }
          bc 34 d6 86  }  Transaction ID
          fa 87 df ae  }
          80 22 00 10     SOFTWARE attribute header
          53 54 55 4e  }
          20 74 65 73  }  User-agent...
          74 20 63 6c  }  ...name
          69 65 6e 74  }
          00 24 00 04     PRIORITY attribute header
          6e 00 01 ff     ICE priority value
          80 29 00 08     ICE-CONTROLLED attribute header
          93 2f f9 b1  }  Pseudo-random tie breaker...
          51 26 3b 36  }   ...for ICE control
          00 06 00 09     USERNAME attribute header
          65 76 74 6a  }
          3a 68 36 76  }  Username (9 bytes) and padding (3 bytes)
          59 20 20 20  }
          00 08 00 14     MESSAGE-INTEGRITY attribute header
          9a ea a7 0c  }
          bf d8 cb 56  }
          78 1e f2 b5  }  HMAC-SHA1 fingerprint
          b2 d3 f2 49  }
          c1 b5 71 a2  }
          80 28 00 04     FINGERPRINT attribute header
          e5 7a 3b cf     CRC32 fingerprint

2.2.  Sample IPv4 response

   This response used the following parameter:

   Password:  "VOkJxbRl1RmTxUk/WvJxBt" (without quotes)

   Software name:  "test vector" (without quotes)

   Mapped address:  192.0.2.1 port 32853

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     01 01 00 3c     Response type and message length
     21 12 a4 42     Magic cookie
     b7 e7 a7 01  }
     bc 34 d6 86  }  Transaction ID
     fa 87 df ae  }
     80 22 00 0b     SOFTWARE attribute header
     74 65 73 74  }
     20 76 65 63  }  UTF-8 server name
     74 6f 72 20  }
     00 20 00 08     XOR-MAPPED-ADDRESS attribute header
     00 01 a1 47     Address family (IPv4) and xor'd mapped port number
     e1 12 a6 43     Xor'd mapped IPv4 address
     00 08 00 14     MESSAGE-INTEGRITY attribute header
     2b 91 f5 99  }
     fd 9e 90 c3  }
     8c 74 89 f9  }  HMAC-SHA1 fingerprint
     2a f9 ba 53  }
     f0 6b e7 d7  }
     80 28 00 04     FINGERPRINT attribute header
     c0 7d 4c 96     CRC32 fingerprint

2.3.  Sample IPv6 response

   This response used the following parameter:

   Password:  "VOkJxbRl1RmTxUk/WvJxBt" (without quotes)

   Software name:  "test vector" (without quotes)

   Mapped address:  2001:db8:1234:5678:11:2233:4455:6677 port 32853

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     01 01 00 48     Response type and message length
     21 12 a4 42     Magic cookie
     b7 e7 a7 01  }
     bc 34 d6 86  }  Transaction ID
     fa 87 df ae  }
     80 22 00 0b     SOFTWARE attribute header
     74 65 73 74  }
     20 76 65 63  }  UTF-8 server name
     74 6f 72 20  }
     00 20 00 14     XOR-MAPPED-ADDRESS attribute header
     00 02 a1 47     Address family (IPv6) and xor'd mapped port number
     01 13 a9 fa  }
     a5 d3 f1 79  }  Xor'd mapped IPv6 address
     bc 25 f4 b5  }
     be d2 b9 d9  }
     00 08 00 14     MESSAGE-INTEGRITY attribute header
     a3 82 95 4e  }
     4b e6 7b f1  }
     17 84 c9 7c  }  HMAC-SHA1 fingerprint
     82 92 c2 75  }
     bf e3 ed 41  }
     80 28 00 04     FINGERPRINT attribute header
     c8 fb 0b 4c     CRC32 fingerprint

2.4.  Sample request with long-term authentication

   This request uses the following parameters:

   Username:  "<U+30DE><U+30C8><U+30EA><U+30C3><U+30AF><U+30B9>"
      (without quotes) unaffected by SASLprep[RFC4013] processing

   Password:  "The<U+00AD>M<U+00AA>tr<U+2168>" resp "TheMatrIX" (without
      quotes) before resp after SASLprep processing

   Nonce:  "f//499k954d6OL34oL9FSTvy64sA" (without quotes)

   Realm:  "example.org" (without quotes)

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      00 01 00 60     Request type and message length
      21 12 a4 42     Magic cookie
      78 ad 34 33  }
      c6 ad 72 c0  }  Transaction ID
      29 da 41 2e  }
      00 06 00 12     USERNAME attribute header
      e3 83 9e e3  }
      83 88 e3 83  }
      aa e3 83 83  }  Username value (18 bytes) and padding (2 bytes)
      e3 82 af e3  }
      82 b9 00 00  }
      00 15 00 1c     NONCE attribute header
      66 2f 2f 34  }
      39 39 6b 39  }
      35 34 64 36  }
      4f 4c 33 34  }  Nonce value
      6f 4c 39 46  }
      53 54 76 79  }
      36 34 73 41  }
      00 14 00 0b     REALM attribute header
      65 78 61 6d  }
      70 6c 65 2e  }  Realm value (11 bytes) and padding (1 byte)
      6f 72 67 00  }
      00 08 00 14     MESSAGE-INTEGRITY attribute header
      f6 70 24 65  }
      6d d6 4a 3e  }
      02 b8 e0 71  }  HMAC-SHA1 fingerprint
      2e 85 c9 a2  }
      8c a8 96 66  }

3.  Security Considerations

   There are no security considerations.

4.  IANA Considerations

   This document raises no IANA considerations.

5.  Acknowledgements

   The author would like to thank Marc Petit-Huguenin, Philip Matthews
   and Dan Wing for their inputs, and Brian Korver, Alfred E. Heggestad
   and Gustavo Garcia for their reviews.

6.  References

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6.1.  Normative References

   [RFC5389]              Rosenberg, J., Mahy, R., Matthews, P., and D.
                          Wing, "Session Traversal Utilities for NAT
                          (STUN)", RFC 5389, October 2008.

   [I-D.ietf-mmusic-ice]  Rosenberg, J., "Interactive Connectivity
                          Establishment (ICE): A Protocol for Network
                          Address  Translator (NAT) Traversal for Offer/
                          Answer Protocols", draft-ietf-mmusic-ice-19
                          (work in progress), October 2007.

6.2.  Informative References

   [RFC2104]              Krawczyk, H., Bellare, M., and R. Canetti,
                          "HMAC: Keyed-Hashing for Message
                          Authentication", RFC 2104, February 1997.

   [RFC4013]              Zeilenga, K., "SASLprep: Stringprep Profile
                          for User Names and Passwords", RFC 4013,
                          February 2005.

Appendix A.  Source code for test vectors

   const unsigned char req[] =
     "\x00\x01\x00\x58"
     "\x21\x12\xa4\x42"
     "\xb7\xe7\xa7\x01\xbc\x34\xd6\x86\xfa\x87\xdf\xae"
     "\x80\x22\x00\x10"
       "STUN test client"
     "\x00\x24\x00\x04"
       "\x6e\x00\x01\xff"
     "\x80\x29\x00\x08"
       "\x93\x2f\xf9\xb1\x51\x26\x3b\x36"
     "\x00\x06\x00\x09"
       "\x65\x76\x74\x6a\x3a\x68\x36\x76\x59\x20\x20\x20"
     "\x00\x08\x00\x14"
       "\x9a\xea\xa7\x0c\xbf\xd8\xcb\x56\x78\x1e\xf2\xb5"
       "\xb2\xd3\xf2\x49\xc1\xb5\x71\xa2"
     "\x80\x28\x00\x04"
       "\xe5\x7a\x3b\xcf";

                              Request message

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   const unsigned char respv4[] =
     "\x01\x01\x00\x3c"
     "\x21\x12\xa4\x42"
     "\xb7\xe7\xa7\x01\xbc\x34\xd6\x86\xfa\x87\xdf\xae"
     "\x80\x22\x00\x0b"
       "\x74\x65\x73\x74\x20\x76\x65\x63\x74\x6f\x72\x20"
     "\x00\x20\x00\x08"
       "\x00\x01\xa1\x47\xe1\x12\xa6\x43"
     "\x00\x08\x00\x14"
       "\x2b\x91\xf5\x99\xfd\x9e\x90\xc3\x8c\x74\x89\xf9"
       "\x2a\xf9\xba\x53\xf0\x6b\xe7\xd7"
     "\x80\x28\x00\x04"
       "\xc0\x7d\x4c\x96";

                           IPv4 response message

   const unsigned char respv6[] =
     "\x01\x01\x00\x48"
     "\x21\x12\xa4\x42"
     "\xb7\xe7\xa7\x01\xbc\x34\xd6\x86\xfa\x87\xdf\xae"
     "\x80\x22\x00\x0b"
       "\x74\x65\x73\x74\x20\x76\x65\x63\x74\x6f\x72\x20"
     "\x00\x20\x00\x14"
       "\x00\x02\xa1\x47"
       "\x01\x13\xa9\xfa\xa5\xd3\xf1\x79"
       "\xbc\x25\xf4\xb5\xbe\xd2\xb9\xd9"
     "\x00\x08\x00\x14"
       "\xa3\x82\x95\x4e\x4b\xe6\x7b\xf1\x17\x84\xc9\x7c"
       "\x82\x92\xc2\x75\xbf\xe3\xed\x41"
     "\x80\x28\x00\x04"
       "\xc8\xfb\x0b\x4c";

                           IPv6 response message

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   const unsigned char reqltc[] =
     "\x00\x01\x00\x60"
     "\x21\x12\xa4\x42"
     "\x78\xad\x34\x33\xc6\xad\x72\xc0\x29\xda\x41\x2e"
     "\x00\x06\x00\x12"
       "\xe3\x83\x9e\xe3\x83\x88\xe3\x83\xaa\xe3\x83\x83"
       "\xe3\x82\xaf\xe3\x82\xb9\x00\x00"
     "\x00\x15\x00\x1c"
       "\x66\x2f\x2f\x34\x39\x39\x6b\x39\x35\x34\x64\x36"
       "\x4f\x4c\x33\x34\x6f\x4c\x39\x46\x53\x54\x76\x79"
       "\x36\x34\x73\x41"
     "\x00\x14\x00\x0b"
       "\x65\x78\x61\x6d\x70\x6c\x65\x2e\x6f\x72\x67\x00"
     "\x00\x08\x00\x14"
       "\xf6\x70\x24\x65\x6d\xd6\x4a\x3e\x02\xb8\xe0\x71"
       "\x2e\x85\xc9\xa2\x8c\xa8\x96\x66";

                    Request with long-term credentials

Author's Address

   Remi Denis-Courmont
   Nokia Corporation
   P.O. Box 407
   NOKIA GROUP  00045
   FI

   Phone: +358 50 487 6315
   EMail: remi.denis-courmont@nokia.com

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