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Re: MD5 PasswordPacket

From: Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us>
To: Bruce Badger <bruce_badger(at)BadgerSE(dot)com>
Cc: pgsql-interfaces(at)postgresql(dot)org
Subject: Re: MD5 PasswordPacket
Date: 2002-12-20 02:33:46
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-interfaces
Bruce Badger wrote:
> Where can I read up on the encoding of the String in the PasswordPacket 
> required when I get an AuthenticationMD5Password message from the backend?

Read the source code.   :-)

> I've looked at some code that implements the encoding, but reading the 
> specification (the intent) would be most useful.

That string is encoded twice, once with the username string, and another
time with the random salt sent from the server.

> One question in particular springs to mind: can usernames and passwords 
> be made up of multi-byte characters, and how does this affect the MD5 
> encoding?

It should be fine, I think.  The encoding is just a string if bytes to
MD5, and there is no encoding conversion done as part of that transfer.

  Bruce Momjian                        |
  pgman(at)candle(dot)pha(dot)pa(dot)us               |  (610) 359-1001
  +  If your life is a hard drive,     |  13 Roberts Road
  +  Christ can be your backup.        |  Newtown Square, Pennsylvania 19073

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