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@[213.224.115.34]
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Are there different MD5 standards?

The rfc (http://www.faqs.org/rfcs/rfc1321.html) 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
pgsql?)

Thanks,

Marc

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