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Operating Systems Linux Interpreting the encrypted shadow password? Post 302174940 by ramen_noodle on Wednesday 12th of March 2008 04:33:31 PM
Old 03-12-2008
The simple answer is to identify the most secure and compatible hashing algorithm supported by all three platforms, settle on this and alter the systems configurations to honor this algorithm and use it for future password generation. Then a method to generate the passwords for each user using the same salt on all three platforms could be devised along with a way to generate the users passwd/shadow entries and then a method to add these to password/shadow files on target systems.

All of this would be simplified to a great degree if central authentication was in use, ala LDAP or NIS, unless I'm misunderstanding. Otherwise it's a poor man's directory service
 

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PASSWD(1)							      OpenSSL								 PASSWD(1)

NAME
passwd - compute password hashes SYNOPSIS
openssl passwd [-crypt] [-1] [-apr1] [-salt string] [-in file] [-stdin] [-noverify] [-quiet] [-table] {password} DESCRIPTION
The passwd command computes the hash of a password typed at run-time or the hash of each password in a list. The password list is taken from the named file for option -in file, from stdin for option -stdin, or from the command line, or from the terminal otherwise. The Unix standard algorithm crypt and the MD5-based BSD password algorithm 1 and its Apache variant apr1 are available. OPTIONS
-crypt Use the crypt algorithm (default). -1 Use the MD5 based BSD password algorithm 1. -apr1 Use the apr1 algorithm (Apache variant of the BSD algorithm). -salt string Use the specified salt. When reading a password from the terminal, this implies -noverify. -in file Read passwords from file. -stdin Read passwords from stdin. -noverify Don't verify when reading a password from the terminal. -quiet Don't output warnings when passwords given at the command line are truncated. -table In the output list, prepend the cleartext password and a TAB character to each password hash. EXAMPLES
openssl passwd -crypt -salt xx password prints xxj31ZMTZzkVA. openssl passwd -1 -salt xxxxxxxx password prints $1$xxxxxxxx$UYCIxa628.9qXjpQCjM4a.. openssl passwd -apr1 -salt xxxxxxxx password prints $apr1$xxxxxxxx$dxHfLAsjHkDRmG83UXe8K0. 1.0.1e 2013-02-11 PASSWD(1)
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