| /** |
| * \file blowfish.h |
| * |
| * \brief Blowfish block cipher |
| */ |
| /* |
| * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved |
| * SPDX-License-Identifier: Apache-2.0 |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); you may |
| * not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT |
| * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| * |
| * This file is part of Mbed Crypto (https://tls.mbed.org) |
| */ |
| #ifndef MBEDCRYPTO_BLOWFISH_H |
| #define MBEDCRYPTO_BLOWFISH_H |
| |
| #if !defined(MBEDCRYPTO_CONFIG_FILE) |
| #include "config.h" |
| #else |
| #include MBEDCRYPTO_CONFIG_FILE |
| #endif |
| |
| #include <stddef.h> |
| #include <stdint.h> |
| |
| #define MBEDCRYPTO_BLOWFISH_ENCRYPT 1 |
| #define MBEDCRYPTO_BLOWFISH_DECRYPT 0 |
| #define MBEDCRYPTO_BLOWFISH_MAX_KEY_BITS 448 |
| #define MBEDCRYPTO_BLOWFISH_MIN_KEY_BITS 32 |
| #define MBEDCRYPTO_BLOWFISH_ROUNDS 16 /**< Rounds to use. When increasing this value, make sure to extend the initialisation vectors */ |
| #define MBEDCRYPTO_BLOWFISH_BLOCKSIZE 8 /* Blowfish uses 64 bit blocks */ |
| |
| #define MBEDCRYPTO_ERR_BLOWFISH_INVALID_KEY_LENGTH -0x0016 /**< Invalid key length. */ |
| #define MBEDCRYPTO_ERR_BLOWFISH_HW_ACCEL_FAILED -0x0017 /**< Blowfish hardware accelerator failed. */ |
| #define MBEDCRYPTO_ERR_BLOWFISH_INVALID_INPUT_LENGTH -0x0018 /**< Invalid data input length. */ |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| #if !defined(MBEDCRYPTO_BLOWFISH_ALT) |
| // Regular implementation |
| // |
| |
| /** |
| * \brief Blowfish context structure |
| */ |
| typedef struct |
| { |
| uint32_t P[MBEDCRYPTO_BLOWFISH_ROUNDS + 2]; /*!< Blowfish round keys */ |
| uint32_t S[4][256]; /*!< key dependent S-boxes */ |
| } |
| mbedcrypto_blowfish_context; |
| |
| #else /* MBEDCRYPTO_BLOWFISH_ALT */ |
| #include "blowfish_alt.h" |
| #endif /* MBEDCRYPTO_BLOWFISH_ALT */ |
| |
| /** |
| * \brief Initialize Blowfish context |
| * |
| * \param ctx Blowfish context to be initialized |
| */ |
| void mbedcrypto_blowfish_init( mbedcrypto_blowfish_context *ctx ); |
| |
| /** |
| * \brief Clear Blowfish context |
| * |
| * \param ctx Blowfish context to be cleared |
| */ |
| void mbedcrypto_blowfish_free( mbedcrypto_blowfish_context *ctx ); |
| |
| /** |
| * \brief Blowfish key schedule |
| * |
| * \param ctx Blowfish context to be initialized |
| * \param key encryption key |
| * \param keybits must be between 32 and 448 bits |
| * |
| * \return 0 if successful, or MBEDCRYPTO_ERR_BLOWFISH_INVALID_KEY_LENGTH |
| */ |
| int mbedcrypto_blowfish_setkey( mbedcrypto_blowfish_context *ctx, const unsigned char *key, |
| unsigned int keybits ); |
| |
| /** |
| * \brief Blowfish-ECB block encryption/decryption |
| * |
| * \param ctx Blowfish context |
| * \param mode MBEDCRYPTO_BLOWFISH_ENCRYPT or MBEDCRYPTO_BLOWFISH_DECRYPT |
| * \param input 8-byte input block |
| * \param output 8-byte output block |
| * |
| * \return 0 if successful |
| */ |
| int mbedcrypto_blowfish_crypt_ecb( mbedcrypto_blowfish_context *ctx, |
| int mode, |
| const unsigned char input[MBEDCRYPTO_BLOWFISH_BLOCKSIZE], |
| unsigned char output[MBEDCRYPTO_BLOWFISH_BLOCKSIZE] ); |
| |
| #if defined(MBEDCRYPTO_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 MBEDCRYPTO_BLOWFISH_ENCRYPT or MBEDCRYPTO_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 |
| * MBEDCRYPTO_ERR_BLOWFISH_INVALID_INPUT_LENGTH |
| */ |
| int mbedcrypto_blowfish_crypt_cbc( mbedcrypto_blowfish_context *ctx, |
| int mode, |
| size_t length, |
| unsigned char iv[MBEDCRYPTO_BLOWFISH_BLOCKSIZE], |
| const unsigned char *input, |
| unsigned char *output ); |
| #endif /* MBEDCRYPTO_CIPHER_MODE_CBC */ |
| |
| #if defined(MBEDCRYPTO_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 MBEDCRYPTO_BLOWFISH_ENCRYPT or MBEDCRYPTO_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 mbedcrypto_blowfish_crypt_cfb64( mbedcrypto_blowfish_context *ctx, |
| int mode, |
| size_t length, |
| size_t *iv_off, |
| unsigned char iv[MBEDCRYPTO_BLOWFISH_BLOCKSIZE], |
| const unsigned char *input, |
| unsigned char *output ); |
| #endif /*MBEDCRYPTO_CIPHER_MODE_CFB */ |
| |
| #if defined(MBEDCRYPTO_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 mbedcrypto_blowfish_crypt_ctr( mbedcrypto_blowfish_context *ctx, |
| size_t length, |
| size_t *nc_off, |
| unsigned char nonce_counter[MBEDCRYPTO_BLOWFISH_BLOCKSIZE], |
| unsigned char stream_block[MBEDCRYPTO_BLOWFISH_BLOCKSIZE], |
| const unsigned char *input, |
| unsigned char *output ); |
| #endif /* MBEDCRYPTO_CIPHER_MODE_CTR */ |
| |
| #ifdef __cplusplus |
| } |
| #endif |
| |
| #endif /* blowfish.h */ |