STREAMS Modules                                      authmd5h(7M)

NAME
     authmd5h -  HMAC-MD5  Authentication  Algorithm  Module  for
     IPsec

SYNOPSIS
     strmod/authmd5h

DESCRIPTION
     This module implements the HMAC-MD5 authentication algorithm
     using  the  MD5  message-digest algorithm and the HMAC tech-
     nique documented in RFC 2104. The authmd5h  module  has  the
     following properties:

          key size
                128 bits

          digest size
                96 bits (truncated from 128)

     authmd5h is used by both AH and ESP.

ATTRIBUTES
     See attributes(5)  for descriptions of the following  attri-
     butes:

     ____________________________________________________________
    |       ATTRIBUTE TYPE        |       ATTRIBUTE VALUE       |
    |_____________________________|_____________________________|
    | Availability                | SUNWcsr (32-bit)            |
    |_____________________________|_____________________________|
    |                             | SUNWcsrx (64-bit)           |
    |_____________________________|_____________________________|
    | Interface Stability         | Evolving                    |
    |_____________________________|_____________________________|

SEE ALSO
     ipseckey(1M),attributes(5),pf_key(7P),ipsec(7P),ipsecah(7P),ipsecesp(7P)

     Krawczyk,  H., Ballare, M., and Canetti, R., RFC 2104, HMAC:
     Keyed-Hashing  for  Message  Authentication,  The   Internet
     Society, 1997

     Madsen, C. and Glenn, R., RFC 2403, The Use  of  HMAC-MD5-96
     within ESP and AH, The Internet Society, 1998.

     Rivest, R., RFC 1321, The MD5 Message-Digest Algorithm,  The
     Internet Society, 1992.

SunOS 5.8           Last change: 11 Feb 1999                    1