03-27-2013
Lets step back from where for a moment and describe how it starts (first two loops unrolled) and how it ends (when can you tell it is done and is there anything else to do).
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LEARN ABOUT DEBIAN
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)