Change in osmo-ttcn3-hacks[master]: bsc: f_cipher_mode(): verify enc alg in Cipher Mode Complete msg

[neels]

neels has uploaded this change for review. ( https://gerrit.osmocom.org/c/osmo-ttcn3-hacks/+/24671 )


Change subject: bsc: f_cipher_mode(): verify enc alg in Cipher Mode Complete msg
......................................................................

bsc: f_cipher_mode(): verify enc alg in Cipher Mode Complete msg

Related: SYS#5324
Change-Id: I88b386c55e23cc180131e95a005d08cbc3ec102b
---
M bsc/MSC_ConnectionHandler.ttcn
1 file changed, 3 insertions(+), 1 deletion(-)



  git pull ssh://gerrit.osmocom.org:29418/osmo-ttcn3-hacks refs/changes/71/24671/1

diff --git a/bsc/MSC_ConnectionHandler.ttcn b/bsc/MSC_ConnectionHandler.ttcn
index d902301..7fb7130 100644
--- a/bsc/MSC_ConnectionHandler.ttcn
+++ b/bsc/MSC_ConnectionHandler.ttcn
@@ -758,11 +758,13 @@
 		repeat;
 		}
 	[] BSSAP.receive(tr_BSSMAP_CipherModeCompl) -> value bssap {
-		// bssap.bssmap.cipherModeComplete.chosenEncryptionAlgorithm.algoritmhIdentifier
 		if (exp_fail == true) {
 			Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail, "Unexpected Cipher Mode Complete");
 		} else {
 			setverdict(pass);
+			if (oct2int(bssap.pdu.bssmap.cipherModeComplete.chosenEncryptionAlgorithm.algorithmIdentifier) != enum2int(alg_rsl)) {
+				setverdict(fail, "Unexpected Encryption Algorithm ID in BSSMAP Cipher Mode Complete");
+			}
 		}
 		}
 	[] BSSAP.receive(tr_BSSMAP_CipherModeRej) -> value bssap {

-- 
To view, visit https://gerrit.osmocom.org/c/osmo-ttcn3-hacks/+/24671
To unsubscribe, or for help writing mail filters, visit https://gerrit.osmocom.org/settings

Gerrit-Project: osmo-ttcn3-hacks
Gerrit-Branch: master
Gerrit-Change-Id: I88b386c55e23cc180131e95a005d08cbc3ec102b
Gerrit-Change-Number: 24671
Gerrit-PatchSet: 1
Gerrit-Owner: neels <nhofmeyr at sysmocom.de>
Gerrit-MessageType: newchange
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osmocom.org/pipermail/gerrit-log/attachments/20210615/48b95d18/attachment.htm>