1 files changed, 67 insertions, 0 deletions
diff --git a/src/libzrtpcpp/crypto/openssl/hmac256.cpp b/src/libzrtpcpp/crypto/openssl/hmac256.cpp
new file mode 100644
index 0000000..a054c02
--- /dev/null
+++ b/src/libzrtpcpp/crypto/openssl/hmac256.cpp
@@ -0,0 +1,67 @@
+/*
+  Copyright (C) 2005, 2004 Erik Eliasson, Johan Bilien
+
+  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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+ * In addition, as a special exception, the copyright holders give
+ * permission to link the code of portions of this program with the
+ * OpenSSL library under certain conditions as described in each
+ * individual source file, and distribute linked combinations
+ * including the two.
+ * You must obey the GNU General Public License in all respects
+ * for all of the code used other than OpenSSL.  If you modify
+ * file(s) with this exception, you may extend this exception to your
+ * version of the file(s), but you are not obligated to do so.  If you
+ * do not wish to do so, delete this exception statement from your
+ * version.  If you delete this exception statement from all source
+ * files in the program, then also delete it here.
+
+*/
+
+/*
+ * Authors: Erik Eliasson <eliasson@it.kth.se>
+ *          Johan Bilien <jobi@via.ecp.fr>
+ */
+
+#include <openssl/hmac.h>
+#include <libzrtpcpp/crypto/hmac256.h>
+
+void hmac_sha256(uint8_t* key, uint32_t key_length,
+		uint8_t* data, int32_t data_length,
+                uint8_t* mac, uint32_t* mac_length)
+{
+    unsigned int tmp;
+    HMAC( EVP_sha256(), key, key_length, data, data_length, mac, &tmp );
+    *mac_length = tmp;
+}
+
+void hmac_sha256(uint8_t* key, uint32_t key_length,
+                 uint8_t* data_chunks[],
+                 uint32_t data_chunck_length[],
+                 uint8_t* mac, uint32_t* mac_length )
+{
+    unsigned int tmp;
+    HMAC_CTX ctx;
+    HMAC_CTX_init( &ctx );
+    HMAC_Init_ex( &ctx, key, key_length, EVP_sha256(), NULL );
+    while( *data_chunks ){
+      HMAC_Update( &ctx, *data_chunks, *data_chunck_length );
+      data_chunks ++;
+      data_chunck_length ++;
+    }
+    HMAC_Final( &ctx, mac, &tmp);
+    *mac_length = tmp;
+    HMAC_CTX_cleanup( &ctx );
+}