Passwd format?

[Kris Kennaway]

On Sat, Nov 13, 2004 at 05:42:53PM +0100, Ivan Voras wrote:
> The Handbook and crypt(3) say passwords in master.passwd are MD5 hashes 
> if they start with $1$, for example:
> 
> $1$DP.s8oCc$VJo0/026/S5ng6HlD1Sz8/
> 
> the format is $1$salt$rest. I have several questions:
> 
> How are the values encoded? This looks something like base64.
> 
> Is it possible to actually verify the password against this format using 
> only a bare implementation of the md5 algorithm?
> 
> Actually, the reason for these questions is that I'm considering using 
> LDAP authentication on a machine with lots of users and I'm wondering if 
> existing passwd information could be transported to LDAP. Any 
> experiences/docs on this?

man 3 crypt, or see the source code

Kris
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