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Date: Wed, 13 Feb 2013 12:58:49 +0200
From: Aki Immonen <>
Subject: Cracking AIX {smd5} password hashes

Hello Everybody, 

I'm trying to figure out how to crack AIX 6.1 and 7.1 password hashes. The hashes are stored at /etc/security/passwd and are formatted as follows:

	password = {smd5}s8/xSJ/v$uGam4GB8hOjTLQqvBfxJ2/
	lastupdate = 1360665171

The password that resulted the above hash is 'password'.

The AIX documentation says it is salted MD5 hash, but the format seems to be different that the normal $1$ hashes. 
The salt and the hash both seem to be BASE64 encoded, and I've tried to re-generate the hash with this command without success:

(echo "s8/xSJ/v"|base64 -D; echo -n "password")|openssl md5 -binary|base64

Any ideas?


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