Can you convert the output of php crypt() to valid MD5?

Question

I have some strings that have been encrypted using the PHP function crypt().

The outputs look something like this:

$1$Vf/.4.1.$CgCo33ebiHVuFhpwS.kMI0         


        

Answer 1

$1$ indeed means that this is a MD5 hash, but crypt generates a random salt. This is why you find a different MD5 value. If you include the generated salt you will find the same result.

The salt is base64 encoded in the output, as the hash.

The algorithm used is a system wide parameter. Generally this is MD5, you are right.