Using a salt value Post: 302712259

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LEARN ABOUT SUSE

crypt_sunmd5

crypt_sunmd5(5) 					Standards, Environments, and Macros					   crypt_sunmd5(5)

NAME

       crypt_sunmd5 - password hashing module using MD5 message hash algorithm

SYNOPSIS

       /usr/lib/security/$ISA/crypt_sunmd5.so

DESCRIPTION

       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 crypt.conf(4):

       rounds=<positive_number>

	   Specifies  the number of additional rounds of MD5 to use in generation of the salt; the default number of rounds is 4096. Negative val-
	   ues 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_gensalt(3C). For example:

	   $md5,rounds=1000$nlxmTTpz$

	   When crypt_gensalt(3C) is being used to generate a new salt, if the number of additional 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-consum-
	   ing) salts on password change.

ATTRIBUTES

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

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |Safe			   |
       +-----------------------------+-----------------------------+

SEE ALSO

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

SunOS 5.10							    23 Dec 2003 						   crypt_sunmd5(5)