Move SRTP implementation into crypto library for reuse

1 files changed, 82 insertions, 0 deletions

diff --git a/plugins/crypto-vala/src/srtp.h b/plugins/crypto-vala/src/srtp.h
new file mode 100644
index 00000000..abca6988
--- /dev/null
+++ b/plugins/crypto-vala/src/srtp.h
@@ -0,0 +1,82 @@
+/*
+ * Secure RTP with libgcrypt
+ * Copyright (C) 2007  Rémi Denis-Courmont
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public License
+ * as published by the Free Software Foundation; either version 2.1
+ * of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ ****************************************************************************/
+
+#ifndef LIBVLC_SRTP_H
+# define LIBVLC_SRTP_H 1
+#include <stdint.h>
+
+typedef struct srtp_session_t srtp_session_t;
+
+enum
+{
+    SRTP_UNENCRYPTED=0x1,   //< do not encrypt SRTP packets
+    SRTCP_UNENCRYPTED=0x2,  //< do not encrypt SRTCP packets
+    SRTP_UNAUTHENTICATED=0x4, //< authenticate only SRTCP packets
+
+    SRTP_RCC_MODE1=0x10,    //< use Roll-over-Counter Carry mode 1
+    SRTP_RCC_MODE2=0x20,    //< use Roll-over-Counter Carry mode 2
+    SRTP_RCC_MODE3=0x30,    //< use Roll-over-Counter Carry mode 3 (insecure)
+
+    SRTP_FLAGS_MASK=0x37    //< mask for valid flags
+};
+
+/** SRTP encryption algorithms (ciphers); same values as MIKEY */
+enum
+{
+    SRTP_ENCR_NULL=0,   //< no encryption
+    SRTP_ENCR_AES_CM=1, //< AES counter mode
+    SRTP_ENCR_AES_F8=2, //< AES F8 mode (not implemented)
+};
+
+/** SRTP authenticaton algorithms; same values as MIKEY */
+enum
+{
+    SRTP_AUTH_NULL=0,      //< no authentication code
+    SRTP_AUTH_HMAC_SHA1=1, //< HMAC-SHA1
+};
+
+/** SRTP pseudo random function; same values as MIKEY */
+enum
+{
+    SRTP_PRF_AES_CM=0, //< AES counter mode
+};
+
+# ifdef __cplusplus
+extern "C" {
+# endif
+
+srtp_session_t *srtp_create (int encr, int auth, unsigned tag_len, int prf,
+                             unsigned flags);
+void srtp_destroy (srtp_session_t *s);
+
+int srtp_setkey (srtp_session_t *s, const void *key, size_t keylen,
+                 const void *salt, size_t saltlen);
+int srtp_setkeystring (srtp_session_t *s, const char *key, const char *salt);
+
+void srtp_setrcc_rate (srtp_session_t *s, uint16_t rate);
+
+int srtp_send (srtp_session_t *s, uint8_t *buf, size_t *lenp, size_t maxsize);
+int srtp_recv (srtp_session_t *s, uint8_t *buf, size_t *lenp);
+int srtcp_send (srtp_session_t *s, uint8_t *buf, size_t *lenp, size_t maxsiz);
+int srtcp_recv (srtp_session_t *s, uint8_t *buf, size_t *lenp);
+
+# ifdef __cplusplus
+}
+# endif
+#endif
\ No newline at end of file