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authorMark Purcell <msp@debian.org>2013-07-09 15:55:55 +0100
committerMark Purcell <msp@debian.org>2013-07-09 15:55:55 +0100
commit669109e369a1be69ff7c4108eb545eff4c5c26d9 (patch)
tree73c117a2e7dd22a7a6ee315101f6357ab43386ec /src/libzrtpcpp/crypto/gcrypt/gcryptAesCFB.cpp
libzrtpcpp (2.3.4-1) unstable; urgency=medium
* New upstream release - Fixes "CVE-2013-2221 CVE-2013-2222 CVE-2013-2223" (Closes: #714650) # imported from the archive
Diffstat (limited to 'src/libzrtpcpp/crypto/gcrypt/gcryptAesCFB.cpp')
-rw-r--r--src/libzrtpcpp/crypto/gcrypt/gcryptAesCFB.cpp77
1 files changed, 77 insertions, 0 deletions
diff --git a/src/libzrtpcpp/crypto/gcrypt/gcryptAesCFB.cpp b/src/libzrtpcpp/crypto/gcrypt/gcryptAesCFB.cpp
new file mode 100644
index 0000000..3673619
--- /dev/null
+++ b/src/libzrtpcpp/crypto/gcrypt/gcryptAesCFB.cpp
@@ -0,0 +1,77 @@
+/*
+ Copyright (C) 2006-2007 Werner Dittmann
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program 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 General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+/** Copyright (C) 2006, 2007
+ *
+ * @author Werner Dittmann <Werner.Dittmann@t-online.de>
+ */
+
+#include <gcrypt.h>
+#include <libzrtpcpp/crypto/aesCFB.h>
+
+
+extern void initializeGcrypt();
+
+void aesCfbEncrypt(uint8_t* key, int32_t keyLength, uint8_t* IV, uint8_t *data,
+ int32_t dataLength)
+{
+ gcry_error_t err = 0;
+ int algo;
+
+ initializeGcrypt();
+
+ if (keyLength == 16) {
+ algo = GCRY_CIPHER_AES;
+ }
+ else if (keyLength == 32) {
+ algo = GCRY_CIPHER_AES256;
+ }
+ else {
+ return;
+ }
+ gcry_cipher_hd_t tmp;
+ err = gcry_cipher_open(&tmp, algo, GCRY_CIPHER_MODE_CFB, 0);
+ err = gcry_cipher_setkey(tmp, key, keyLength);
+ err = gcry_cipher_setiv (tmp, IV, AES_BLOCK_SIZE);
+ err = gcry_cipher_encrypt (tmp, data, dataLength, data, dataLength);
+ gcry_cipher_close(tmp);
+}
+
+void aesCfbDecrypt(uint8_t* key, int32_t keyLength, const uint8_t* IV, uint8_t *data,
+ int32_t dataLength)
+{
+ gcry_error_t err = 0;
+ int algo;
+
+ initializeGcrypt();
+
+ if (keyLength == 16) {
+ algo = GCRY_CIPHER_AES;
+ }
+ else if (keyLength == 32) {
+ algo = GCRY_CIPHER_AES256;
+ }
+ else {
+ return;
+ }
+ gcry_cipher_hd_t tmp;
+ err = gcry_cipher_open(&tmp, algo, GCRY_CIPHER_MODE_CFB, 0);
+ err = gcry_cipher_setkey(tmp, key, keyLength);
+ err = gcry_cipher_setiv (tmp, IV, AES_BLOCK_SIZE);
+ err = gcry_cipher_decrypt (tmp, data, dataLength, data, dataLength);
+ gcry_cipher_close(tmp);
+}