From: Jaroslav Kysela <perex@perex.cz>
Date: Thu, 12 Jun 2014 13:10:01 +0000 (+0200)
Subject: cwc: return back the key composition - seems like some CA cards returns only single key
X-Git-Tag: v4.1~1923
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=da05976c3209df9ef448cb672ee1dbbf4a4d813e;p=thirdparty%2Ftvheadend.git

cwc: return back the key composition - seems like some CA cards returns only single key
---

diff --git a/src/descrambler/cwc.c b/src/descrambler/cwc.c
index 551a9ecf4..c3ec11fea 100755
--- a/src/descrambler/cwc.c
+++ b/src/descrambler/cwc.c
@@ -143,6 +143,8 @@ typedef struct cwc_service {
     ECM_RESET
   } ecm_state;
 
+  uint8_t cs_even[8];
+  uint8_t cs_odd[8];
   tvhcsa_t cs_csa;
   
   LIST_HEAD(, ecm_pid) cs_pids;
@@ -693,6 +695,7 @@ handle_ecm_reply(cwc_service_t *ct, ecm_section_t *es, uint8_t *msg,
   int i;
   int64_t delay = (getmonoclock() - es->es_time) / 1000LL; // in ms
   es->es_pending = 0;
+  static uint8_t empty[8] = { 0, 0, 0, 0, 0, 0, 0, 0 };
 
   snprintf(chaninfo, sizeof(chaninfo), " (PID %d)", es->es_channel);
 
@@ -777,7 +780,12 @@ forbid:
 	     "Obtained key for service \"%s\" in %"PRId64" ms, from %s",
 	     t->s_dvb_svcname, delay, ct->td_nicename);
 
-    descrambler_keys((th_descrambler_t *)ct, msg + 3, msg + 3 + 8);
+    if (memcmp(msg + 3, empty, 8))
+      memcpy(ct->cs_even, msg + 3, 8);
+    if (memcmp(msg + 3 + 8, empty, 8))
+      memcpy(ct->cs_odd, msg + 3 + 8, 8);
+
+    descrambler_keys((th_descrambler_t *)ct, ct->cs_even, ct->cs_odd);
 
     ep = LIST_FIRST(&ct->cs_pids);
     while(ep != NULL) {