[466] in Kerberos-V5-bugs
DES
daemon@ATHENA.MIT.EDU (Pau-Chen Cheng)
Thu May 5 18:36:51 1994
Date: Thu, 5 May 1994 18:34:36 -0400
From: pau@watson.ibm.com (Pau-Chen Cheng)
To: krb5-bugs@MIT.EDU
Hi, I have built Kerbero V Beta 3 on a RS/6000 running AIX 3.2.5.
I am having problems with DES. To determine the cause, I did some
experiments by comparing the DES routines provided by AIX 3.2.5
and by Kerberos.
I found that the DES routines provided by AIX pass all the tests
in the Kerberos DES "verify" program. They can encrypt and dcerypt
correctly.
The MIT code failed during "verify" CBC test. It passed the ECB test.
Also, I fed both AIX and MIT routines an 8-byte input to further test
the ECB mode; using the same key ("0123456789abcdef") as in the MIT
verify program. The AIX routines can encrypt and decrypt and recover
the input. The MIT routines generate a different cipher than AIX
routines do.
I believe it must have been something worng with my built process.
However, since I am not a DES expert. I would like to make sure
if anybody else has reported a similar bug.
Thank you.
Regards, Pau-Chen
