On Tue, 26 Oct 2004, Scot Jenkins wrote:

>> Nope, it's exactly right.  That's how crypt()-based authentication 
>> works, precisely.  It needs to know what salt the original password was 
>> encrypted with, so it's the first two characters of the encrypted 
>> password.  It crypt()s the attempted password (from the authentication 
>> attempt) with the same salt, and if the two match, the password must be 
>> the same (theoretically).
>
> Would this explain the "$1$" string that starts all md5 password values 
> in /etc/shadow? -- scot


That's not how it is on my system - every password begins with a different 
two-character salt string.  Does 'crypt' use md5?  I think it uses 
something else, but I'm not 100% on that.

Mike

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