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+/*
+ 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/>.
+*/
+
+/*
+ * Authors: Werner Dittmann <Werner.Dittmann@t-online.de>
+ */
+
+#ifndef _TWOCFB_H__
+#define _TWOCFB_H__
+
+#include <stdint.h>
+
+/**
+ * @file aesCFB.h
+ * @brief Function that provide AES CFB mode support
+ *
+ * @ingroup GNU_ZRTP
+ * @{
+ */
+
+#ifndef TWO_BLOCK_SIZE
+#define TWO_BLOCK_SIZE 16
+#endif
+
+/**
+ * Encrypt data with Twofish CFB mode, full block feedback size.
+ *
+ * This functions takes one data chunk and encrypts it with
+ * Twofish CFB mode. The lenght of the data may be arbitrary and
+ * it is not needed to be a multiple of Twofish blocksize.
+ *
+ * @param key
+ * Points to the key bytes.
+ * @param keyLength
+ * Length of the key in bytes
+ * @param IV
+ * The initialization vector which must be TWO_BLOCKSIZE (16) bytes.
+ * @param data
+ * Points to a buffer that contains and receives the computed
+ * the data (in-place encryption).
+ * @param dataLength
+ * Length of the data in bytes
+ */
+
+void twoCfbEncrypt(uint8_t* key, int32_t keyLength, uint8_t* IV, uint8_t *data,
+ int32_t dataLength);
+
+/**
+ * Decrypt data with Twofish CFB mode, full block feedback size.
+ *
+ * This functions takes one data chunk and decrypts it with
+ * Twofish CFB mode. The lenght of the data may be arbitrary and
+ * it is not needed to be a multiple of Twofish blocksize.
+ *
+ * @param key
+ * Points to the key bytes.
+ * @param keyLength
+ * Length of the key in bytes
+ * @param IV
+ * The initialization vector which must be TWO_BLOCKSIZE (16) bytes.
+ * @param data
+ * Points to a buffer that contains and receives the computed
+ * the data (in-place decryption).
+ * @param dataLength
+ * Length of the data in bytes
+ */
+
+void twoCfbDecrypt(uint8_t* key, int32_t keyLength, const uint8_t* IV, uint8_t *data,
+ int32_t dataLength);
+/**
+ * @}
+ */
+#endif