Added comment to zuc.cc and zuc.h

lib/include/srslte/common/zuc.h

@@ -1,3 +1,13 @@
+/*---------------------------------------------------------
+
+    zuc.h
+    Adapted from ETSI/SAGE specifications:
+    "Specification of the 3GPP Confidentiality
+    and Integrity Algorithms 128-EEA3 & 128-EIA3.
+    Document 2: ZUC Specification"
+
+---------------------------------------------------------*/
+
 #ifndef SRSLTE_ZUC_H
 #define SRSLTE_ZUC_H
 
@@ -35,4 +45,4 @@ typedef struct {
 void zuc_initialize(zuc_state_t* state, u8* k, u8* iv);
 void zuc_generate_keystream(zuc_state_t* state, int key_stream_len, u32* p_keystream);
 
-#endif // SRSLTE_ZUC_H
+#endif // SRSLTE_ZUC_H

lib/src/common/zuc.cc

@@ -1,4 +1,12 @@
+/*---------------------------------------------------------
 
+    zuc.cc
+    Adapted from ETSI/SAGE specifications:
+    "Specification of the 3GPP Confidentiality
+    and Integrity Algorithms 128-EEA3 & 128-EIA3.
+    Document 2: ZUC Specification"
+
+---------------------------------------------------------*/
 
 #include "srslte/common/zuc.h"