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Full Discussion: passwd length
Operating Systems Solaris passwd length Post 302516443 by jlliagre on Saturday 23rd of April 2011 09:48:37 AM
Old 04-23-2011
There is no maximal password length enforced. However, depending on the algorithm selected to hash a password, only its first n characters will be used and the remaining ones ignored. The default standard unix crypt algorithm picks the first 8 letters of the password to build its hash.

To change this, either use a better backend for authenticating users (e.g. ldap) or replace the algorithm used to encrypt /etc/shadow password fields by setting CRYPT_DEFAULT=X in /etc/security/policy.conf
X=1 is for linux/bsd compatibility
X=2a is for blowfish
X=md5

As all this is plugin based, you can even write your own that demand say 32 minimal password length, and add it to the /etc/security/crypt.conf file
 

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LEARN ABOUT SUSE

crypt_bsdmd5

crypt_bsdmd5(5) 					Standards, Environments, and Macros					   crypt_bsdmd5(5)

NAME

       crypt_bsdmd5 - password hashing module using MD5 message hash algorithm

SYNOPSIS

       /usr/lib/security/$ISA/crypt_bsdmd5.so

DESCRIPTION

       The crypt_bsdmd5 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 1. The output is compatible with md5crypt on BSD and Linux systems.

       The maximum password length for crypt_bsdmd5 is 255 characters.

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							    6 Aug 2003							   crypt_bsdmd5(5)
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