Wireshark mailing list archives
Re: Question regarding decryption of ikev1 ISAKMP messages
From: Jaap Keuter <jaap.keuter () xs4all nl>
Date: Sun, 02 Sep 2012 14:16:16 +0200
Hi, Did this happen? What's the bug number? Thanks Jaap On 07/23/2012 04:43 PM, Alexis La Goutte wrote:
Hi, It is better to create a bug in bugtracker ( https://bugs.wireshark.org ) to no forget your problem... Regards, On Thu, Jun 28, 2012 at 5:51 PM, Susanne Goldammer <Susanne.Goldammer () gmx de <mailto:Susanne.Goldammer () gmx de>> wrote: Hi all, today i was trying to use this feature to decrypt IKEv1 messages exchanged during Main Mode. Herefor i added the Initiator Cookie and the Encryption Key to the IKEv1 Decryption Table. Unfortunately this did not help. I used Wireshark version 1.8.0. A source code analysis then showed up, that the code is checking whether the connection is using Authentication-Method: PSK. In my case it does not use a PSK but RSA-SIG method. So i changed the code epan/dissectors/packet-isakmp.c:1728 if (!decr || decr->is_psk == FALSE || <-- removed this line decr->gi_len == 0 || decr->gr_len == 0) return NULL; and deactivated the line checking for is_psk. Then it was possible to decode the ISAKMP payload (Encrypted data). So the code seems to work for non PSK connections, too. Now i was wondering about the reason for this check. Is it possible to remove this for future versions to make the IKEv1 decryption work for non PSK connections? Thanks a lot for your replies. Susanne
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Current thread:
- Re: Question regarding decryption of ikev1 ISAKMP messages Jaap Keuter (Sep 02)