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MD5 different standards?

From: "M(dot) Bastin" <marcbastin(at)mindspring(dot)com>
To: Joe Conway <mail(at)joeconway(dot)com>
Cc: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>,pgsql-novice <pgsql-novice(at)postgresql(dot)org>
Subject: MD5 different standards?
Date: 2003-05-29 17:24:19
Message-ID: a05210609bafbf001c3de@[] (view raw, whole thread or download thread mbox)
Lists: pgsql-novice
Are there different MD5 standards?

The rfc ( says:

The algorithm takes as input a message of arbitrary length and 
produces as output a 128-bit [= 16 bytes] "fingerprint" or "message 
digest" of the input.

My IDE's MD5 function produces 16 bytes.  Yet for pgsql MD5 should 
produce 32 bytes.

Can I find a human language description of this 32 bytes MD5 
somewhere, so that I can implement it myself.  I'm not good at 
reading C.  (Where did you guys get your info to implement it for 



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