SRTP: remove dedicated gcrypt initialization, use VLC one

Signed-off-by: Rémi Denis-Courmont <remi@remlab.net>
(cherry picked from commit f1a8ab79baee2aa7fbce87f4479b6f0557d9e2a5)

libs/srtp/Makefile.am

@@ -32,11 +32,6 @@ srtp_LDADD = libvlc_srtp.la
 test_recv_LDADD = libvlc_srtp.la
 test_aes_LDADD = @GCRYPT_LIBS@
 
-if !HAVE_WIN32
-libvlc_srtp_la_LIBADD += -lpthread
-test_aes_LDADD += -lpthread
-endif
-
 lcov-run:
 	rm -Rf *.gcda lcov
 	$(MAKE) $(AM_MAKEFLAGS) check

libs/srtp/srtp.c

@@ -43,8 +43,6 @@
 # include <winsock2.h>
 #else
 # include <netinet/in.h>
-# include <pthread.h>
-GCRY_THREAD_OPTION_PTHREAD_IMPL;
 #endif
 
 #define debug( ... ) (void)0
@@ -86,41 +84,6 @@ static inline unsigned rcc_mode (const srtp_session_t *s)
     return (s->flags >> 4) & 3;
 }
 
-static bool libgcrypt_usable = false;
-
-static void initonce_libgcrypt (void)
-{
-#ifndef WIN32
-    gcry_control (GCRYCTL_SET_THREAD_CBS, &gcry_threads_pthread);
-#endif
-
-    if ((gcry_check_version ("1.1.94") == NULL)
-     || gcry_control (GCRYCTL_DISABLE_SECMEM, 0)
-     || gcry_control (GCRYCTL_INITIALIZATION_FINISHED, 0))
-        return;
-
-    libgcrypt_usable = true;
-}
-
-static int init_libgcrypt (void)
-{
-    int retval;
-#ifndef WIN32
-    static pthread_once_t once = PTHREAD_ONCE_INIT;
-
-    pthread_once (&once, initonce_libgcrypt);
-#else
-# warning FIXME: This is not thread-safe.
-    if (!libgcrypt_usable)
-        initonce_libgcrypt ();
-#endif
-
-    retval = libgcrypt_usable ? 0 : -1;
-
-    return retval;
-
-}
-
 
 static void proto_destroy (srtp_proto_t *p)
 {
@@ -170,7 +133,7 @@ static int proto_create (srtp_proto_t *p, int gcipher, int gmd)
 srtp_session_t *
 srtp_create (int encr, int auth, unsigned tag_len, int prf, unsigned flags)
 {
-    if ((flags & ~SRTP_FLAGS_MASK) || init_libgcrypt ())
+    if ((flags & ~SRTP_FLAGS_MASK))
         return NULL;
 
     int cipher, md;

libs/srtp/test-aes.c

@@ -143,8 +143,6 @@ static void test_keystream (void)
 
 static void srtp_test (void)
 {
-    if (init_libgcrypt ())
-        fatal ("Libgcrypt initialization error");
     test_derivation ();
     test_keystream ();
 }

modules/access/rtp/rtp.c

@@ -39,6 +39,8 @@
 #include "rtp.h"
 #ifdef HAVE_SRTP
 # include <srtp.h>
+# include <gcrypt.h>
+# include <vlc_gcrypt.h>
 #endif
 
 #define RTP_CACHING_TEXT N_("RTP de-jitter buffer length (msec)")
@@ -276,6 +278,7 @@ static int Open (vlc_object_t *obj)
     char *key = var_CreateGetNonEmptyString (demux, "srtp-key");
     if (key)
     {
+        vlc_gcrypt_init ();
         p_sys->srtp = srtp_create (SRTP_ENCR_AES_CM, SRTP_AUTH_HMAC_SHA1, 10,
                                    SRTP_PRF_AES_CM, SRTP_RCC_MODE1);
         if (p_sys->srtp == NULL)

modules/stream_out/rtp.c

@@ -42,6 +42,8 @@
 #include <vlc_rand.h>
 #ifdef HAVE_SRTP
 # include <srtp.h>
+# include <gcrypt.h>
+# include <vlc_gcrypt.h>
 #endif
 
 #include "rtp.h"
@@ -1006,6 +1008,7 @@ static sout_stream_id_t *Add( sout_stream_t *p_stream, es_format_t *p_fmt )
     char *key = var_CreateGetNonEmptyString (p_stream, SOUT_CFG_PREFIX"key");
     if (key)
     {
+        vlc_gcrypt_init ();
         id->srtp = srtp_create (SRTP_ENCR_AES_CM, SRTP_AUTH_HMAC_SHA1, 10,
                                    SRTP_PRF_AES_CM, SRTP_RCC_MODE1);
         if (id->srtp == NULL)