crypt_sunmd5 man page on SmartOS

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CRYPT_SUNMD5(5)						       CRYPT_SUNMD5(5)

       crypt_sunmd5 - password hashing module using MD5 message hash algorithm


       The  crypt_sunmd5  module  is a one-way password hashing module for use
       with crypt(3C) that uses the MD5 message hash algorithm. The  algorithm
       identifier for crypt.conf(4) and policy.conf(4) is md5.

       This  module  is	 designed to make it difficult to crack passwords that
       use brute force attacks based on high speed  MD5	 implementations  that
       use code inlining, unrolled loops, and table lookup.

       The maximum password length for crypt_sunmd5 is 255 characters.

       The  following  options	can  be	 passed	 to  the  module  by  means of

				   Specifies the number of  additional	rounds
				   of  MD5  to	use in generation of the salt;
				   the default number of rounds is 4096. Nega‐
				   tive values have no effect and are ignored,
				   that is, the number	of  rounds  cannot  be
				   lowered below 4096.

				   The	number	of additional rounds is stored
				   in the salt string returned	by  crypt_gen‐
				   salt(3C). For example:


				   When	 crypt_gensalt(3C)  is	being  used to
				   generate a new salt, if the number of addi‐
				   tional  rounds  configured in crypt.conf(4)
				   is greater than that in the old  salt,  the
				   value  from	crypt.conf(4) is used instead.
				   This allows for migration to stronger  (but
				   more	  time-consuming)  salts  on  password

       See attributes(5) for descriptions of the following attributes:

       │MT-Level       │ Safe		 │

       passwd(1),   crypt(3C),	 crypt_genhash_impl(3C),    crypt_gensalt(3C),
       crypt_gensalt_impl(3C),	getpassphrase(3C),  crypt.conf(4),  passwd(4),
       policy.conf(4), attributes(5)

				 Dec 23, 2003		       CRYPT_SUNMD5(5)

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