* #35924: added zrtp module build instructions
diff --git a/jni/libzrtp/src/libzrtpcpp/crypto/openssl/AesCFB.cpp b/jni/libzrtp/src/libzrtpcpp/crypto/openssl/AesCFB.cpp
new file mode 100644
index 0000000..595d1ff
--- /dev/null
+++ b/jni/libzrtp/src/libzrtpcpp/crypto/openssl/AesCFB.cpp
@@ -0,0 +1,89 @@
+/*
+ Copyright (C) 2006, 2007 by Werner Dittmann
+
+ 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.
+ */
+
+/** Copyright (C) 2006, 2007
+ *
+ * @author Werner Dittmann <Werner.Dittmann@t-online.de>
+ */
+
+#include <openssl/crypto.h>
+#include <openssl/aes.h>
+#include <string.h>
+
+#include <libzrtpcpp/crypto/aesCFB.h>
+
+// extern void initializeOpenSSL();
+
+
+void aesCfbEncrypt(uint8_t* key, int32_t keyLength, uint8_t* IV, uint8_t *data,
+ int32_t dataLength)
+{
+ AES_KEY aesKey;
+ int usedBytes = 0;
+
+// initializeOpenSSL();
+
+ memset(&aesKey, 0, sizeof( AES_KEY ) );
+ if (keyLength == 16) {
+ AES_set_encrypt_key(key, 128, &aesKey);
+ }
+ else if (keyLength == 32) {
+ AES_set_encrypt_key(key, 256, &aesKey);
+ }
+ else {
+ return;
+ }
+ AES_cfb128_encrypt(data, data, dataLength, &aesKey,
+ IV, &usedBytes, AES_ENCRYPT);
+}
+
+
+void aesCfbDecrypt(uint8_t* key, int32_t keyLength, const uint8_t* IV, uint8_t *data,
+ int32_t dataLength)
+{
+ AES_KEY aesKey;
+ int usedBytes = 0;
+
+// initializeOpenSSL();
+
+ memset(&aesKey, 0, sizeof( AES_KEY ) );
+ if (keyLength == 16) {
+ AES_set_encrypt_key(key, 128, &aesKey);
+ }
+ else if (keyLength == 32) {
+ AES_set_encrypt_key(key, 256, &aesKey);
+ }
+ else {
+ return;
+ }
+ AES_cfb128_encrypt(data, data, dataLength, &aesKey,
+ (unsigned char*)IV, &usedBytes, AES_DECRYPT);
+}