From: Jaroslav Kysela <perex@perex.cz>
Date: Mon, 23 Jan 2023 09:56:28 +0000 (+0100)
Subject: descrambler: cccam - simplify cccam_handle_keys()
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b8b6d5eba112a9ace28db4ebee12c4b6154327c7;p=thirdparty%2Ftvheadend.git

descrambler: cccam - simplify cccam_handle_keys()

Signed-off-by: Jaroslav Kysela <perex@perex.cz>
---

diff --git a/src/descrambler/cccam.c b/src/descrambler/cccam.c
index 2c2219dce..29ab58980 100644
--- a/src/descrambler/cccam.c
+++ b/src/descrambler/cccam.c
@@ -367,17 +367,21 @@ cccam_handle_keys(cccam_t *cccam, cc_service_t *ct, cc_ecm_section_t *es,
 {
   uint8_t *dcw_even, *dcw_odd, _dcw[16];
 
-  if (!cccam->cccam_extended) {
-    cccam_decrypt_cw(cccam->cccam_nodeid, es->es_card_id, buf + 4);
-    memcpy(_dcw, buf + 4, 16);
-    cccam_decrypt(&cccam->recvblock, buf + 4, len - 4);
+  if (buf[1] == MSG_ECM_REQUEST) {
+    if (!cccam->cccam_extended) {
+      cccam_decrypt_cw(cccam->cccam_nodeid, es->es_card_id, buf + 4);
+      memcpy(_dcw, buf + 4, 16);
+      cccam_decrypt(&cccam->recvblock, buf + 4, len - 4);
+    } else {
+      memcpy(_dcw, buf + 4, 16);
+    }
+    dcw_even = _dcw;
+    dcw_odd  = _dcw + 8;
   } else {
-    memcpy(_dcw, buf + 4, 16);
+    dcw_even = NULL;
+    dcw_odd  = NULL;
   }
 
-  dcw_even = buf[1] == MSG_ECM_REQUEST ? _dcw : NULL;
-  dcw_odd  = buf[1] == MSG_ECM_REQUEST ? _dcw + 8 : NULL;
-
   cc_ecm_reply(ct, es, DESCRAMBLER_CSA_CBC, dcw_even, dcw_odd, seq);
 }