From 5e31cfc63da185426c88b9b51e665c0464773fb9 Mon Sep 17 00:00:00 2001
From: Neels Hofmeyr <neels@hofmeyr.de>
Date: Fri, 11 Jun 2021 02:42:11 +0200
Subject: [PATCH] bsc: f_cipher_mode(): verify enc alg in Cipher Mode Complete
 msg

Related: SYS#5324
Change-Id: I88b386c55e23cc180131e95a005d08cbc3ec102b
---
 bsc/MSC_ConnectionHandler.ttcn | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/bsc/MSC_ConnectionHandler.ttcn b/bsc/MSC_ConnectionHandler.ttcn
index 0d46bc6d4..12712db55 100644
--- a/bsc/MSC_ConnectionHandler.ttcn
+++ b/bsc/MSC_ConnectionHandler.ttcn
@@ -758,11 +758,13 @@ runs on MSC_ConnHdlr {
 		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 {