Diff: include/polarssl/blowfish.h

Revision:

0:137634ff4186

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/include/polarssl/blowfish.h	Thu Jun 11 03:27:03 2015 +0000
@@ -0,0 +1,211 @@
+/**
+ * \file blowfish.h
+ *
+ * \brief Blowfish block cipher
+ *
+ *  Copyright (C) 2012-2014, ARM Limited, All Rights Reserved
+ *
+ *  This file is part of mbed TLS (https://tls.mbed.org)
+ *
+ *  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 2 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, write to the Free Software Foundation, Inc.,
+ *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+#ifndef POLARSSL_BLOWFISH_H
+#define POLARSSL_BLOWFISH_H
+
+#if !defined(POLARSSL_CONFIG_FILE)
+#include "config.h"
+#else
+#include POLARSSL_CONFIG_FILE
+#endif
+
+#include <stddef.h>
+
+#if defined(_MSC_VER) && !defined(EFIX64) && !defined(EFI32)
+#include <basetsd.h>
+typedef UINT32 uint32_t;
+#else
+#include <inttypes.h>
+#endif
+
+#define BLOWFISH_ENCRYPT     1
+#define BLOWFISH_DECRYPT     0
+#define BLOWFISH_MAX_KEY     448
+#define BLOWFISH_MIN_KEY     32
+#define BLOWFISH_ROUNDS      16         /**< Rounds to use. When increasing this value, make sure to extend the initialisation vectors */
+#define BLOWFISH_BLOCKSIZE   8          /* Blowfish uses 64 bit blocks */
+
+#define POLARSSL_ERR_BLOWFISH_INVALID_KEY_LENGTH                -0x0016  /**< Invalid key length. */
+#define POLARSSL_ERR_BLOWFISH_INVALID_INPUT_LENGTH              -0x0018  /**< Invalid data input length. */
+
+#if !defined(POLARSSL_BLOWFISH_ALT)
+// Regular implementation
+//
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * \brief          Blowfish context structure
+ */
+typedef struct
+{
+    uint32_t P[BLOWFISH_ROUNDS + 2];    /*!<  Blowfish round keys    */
+    uint32_t S[4][256];                 /*!<  key dependent S-boxes  */
+}
+blowfish_context;
+
+/**
+ * \brief          Initialize Blowfish context
+ *
+ * \param ctx      Blowfish context to be initialized
+ */
+void blowfish_init( blowfish_context *ctx );
+
+/**
+ * \brief          Clear Blowfish context
+ *
+ * \param ctx      Blowfish context to be cleared
+ */
+void blowfish_free( blowfish_context *ctx );
+
+/**
+ * \brief          Blowfish key schedule
+ *
+ * \param ctx      Blowfish context to be initialized
+ * \param key      encryption key
+ * \param keysize  must be between 32 and 448 bits
+ *
+ * \return         0 if successful, or POLARSSL_ERR_BLOWFISH_INVALID_KEY_LENGTH
+ */
+int blowfish_setkey( blowfish_context *ctx, const unsigned char *key,
+                     unsigned int keysize );
+
+/**
+ * \brief          Blowfish-ECB block encryption/decryption
+ *
+ * \param ctx      Blowfish context
+ * \param mode     BLOWFISH_ENCRYPT or BLOWFISH_DECRYPT
+ * \param input    8-byte input block
+ * \param output   8-byte output block
+ *
+ * \return         0 if successful
+ */
+int blowfish_crypt_ecb( blowfish_context *ctx,
+                        int mode,
+                        const unsigned char input[BLOWFISH_BLOCKSIZE],
+                        unsigned char output[BLOWFISH_BLOCKSIZE] );
+
+#if defined(POLARSSL_CIPHER_MODE_CBC)
+/**
+ * \brief          Blowfish-CBC buffer encryption/decryption
+ *                 Length should be a multiple of the block
+ *                 size (8 bytes)
+ *
+ * \note           Upon exit, the content of the IV is updated so that you can
+ *                 call the function same function again on the following
+ *                 block(s) of data and get the same result as if it was
+ *                 encrypted in one call. This allows a "streaming" usage.
+ *                 If on the other hand you need to retain the contents of the
+ *                 IV, you should either save it manually or use the cipher
+ *                 module instead.
+ *
+ * \param ctx      Blowfish context
+ * \param mode     BLOWFISH_ENCRYPT or BLOWFISH_DECRYPT
+ * \param length   length of the input data
+ * \param iv       initialization vector (updated after use)
+ * \param input    buffer holding the input data
+ * \param output   buffer holding the output data
+ *
+ * \return         0 if successful, or
+ *                 POLARSSL_ERR_BLOWFISH_INVALID_INPUT_LENGTH
+ */
+int blowfish_crypt_cbc( blowfish_context *ctx,
+                        int mode,
+                        size_t length,
+                        unsigned char iv[BLOWFISH_BLOCKSIZE],
+                        const unsigned char *input,
+                        unsigned char *output );
+#endif /* POLARSSL_CIPHER_MODE_CBC */
+
+#if defined(POLARSSL_CIPHER_MODE_CFB)
+/**
+ * \brief          Blowfish CFB buffer encryption/decryption.
+ *
+ * \note           Upon exit, the content of the IV is updated so that you can
+ *                 call the function same function again on the following
+ *                 block(s) of data and get the same result as if it was
+ *                 encrypted in one call. This allows a "streaming" usage.
+ *                 If on the other hand you need to retain the contents of the
+ *                 IV, you should either save it manually or use the cipher
+ *                 module instead.
+ *
+ * \param ctx      Blowfish context
+ * \param mode     BLOWFISH_ENCRYPT or BLOWFISH_DECRYPT
+ * \param length   length of the input data
+ * \param iv_off   offset in IV (updated after use)
+ * \param iv       initialization vector (updated after use)
+ * \param input    buffer holding the input data
+ * \param output   buffer holding the output data
+ *
+ * \return         0 if successful
+ */
+int blowfish_crypt_cfb64( blowfish_context *ctx,
+                          int mode,
+                          size_t length,
+                          size_t *iv_off,
+                          unsigned char iv[BLOWFISH_BLOCKSIZE],
+                          const unsigned char *input,
+                          unsigned char *output );
+#endif /*POLARSSL_CIPHER_MODE_CFB */
+
+#if defined(POLARSSL_CIPHER_MODE_CTR)
+/**
+ * \brief               Blowfish-CTR buffer encryption/decryption
+ *
+ * Warning: You have to keep the maximum use of your counter in mind!
+ *
+ * \param ctx           Blowfish context
+ * \param length        The length of the data
+ * \param nc_off        The offset in the current stream_block (for resuming
+ *                      within current cipher stream). The offset pointer to
+ *                      should be 0 at the start of a stream.
+ * \param nonce_counter The 64-bit nonce and counter.
+ * \param stream_block  The saved stream-block for resuming. Is overwritten
+ *                      by the function.
+ * \param input         The input data stream
+ * \param output        The output data stream
+ *
+ * \return         0 if successful
+ */
+int blowfish_crypt_ctr( blowfish_context *ctx,
+                        size_t length,
+                        size_t *nc_off,
+                        unsigned char nonce_counter[BLOWFISH_BLOCKSIZE],
+                        unsigned char stream_block[BLOWFISH_BLOCKSIZE],
+                        const unsigned char *input,
+                        unsigned char *output );
+#endif /* POLARSSL_CIPHER_MODE_CTR */
+
+#ifdef __cplusplus
+}
+#endif
+
+#else  /* POLARSSL_BLOWFISH_ALT */
+#include "blowfish_alt.h"
+#endif /* POLARSSL_BLOWFISH_ALT */
+
+#endif /* blowfish.h */
+