mirror of
https://gitee.com/acl-dev/acl.git
synced 2024-12-14 17:00:52 +08:00
290 lines
12 KiB
C
290 lines
12 KiB
C
/**
|
|
* \file blowfish.h
|
|
*
|
|
* \brief Blowfish block cipher
|
|
*/
|
|
/*
|
|
* Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
|
|
* SPDX-License-Identifier: GPL-2.0
|
|
*
|
|
* 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.
|
|
*
|
|
* This file is part of mbed TLS (https://tls.mbed.org)
|
|
*/
|
|
#ifndef MBEDTLS_BLOWFISH_H
|
|
#define MBEDTLS_BLOWFISH_H
|
|
|
|
#if !defined(MBEDTLS_CONFIG_FILE)
|
|
#include "config.h"
|
|
#else
|
|
#include MBEDTLS_CONFIG_FILE
|
|
#endif
|
|
|
|
#include <stddef.h>
|
|
#include <stdint.h>
|
|
|
|
#include "platform_util.h"
|
|
|
|
#define MBEDTLS_BLOWFISH_ENCRYPT 1
|
|
#define MBEDTLS_BLOWFISH_DECRYPT 0
|
|
#define MBEDTLS_BLOWFISH_MAX_KEY_BITS 448
|
|
#define MBEDTLS_BLOWFISH_MIN_KEY_BITS 32
|
|
#define MBEDTLS_BLOWFISH_ROUNDS 16 /**< Rounds to use. When increasing this value, make sure to extend the initialisation vectors */
|
|
#define MBEDTLS_BLOWFISH_BLOCKSIZE 8 /* Blowfish uses 64 bit blocks */
|
|
|
|
#if !defined(MBEDTLS_DEPRECATED_REMOVED)
|
|
#define MBEDTLS_ERR_BLOWFISH_INVALID_KEY_LENGTH MBEDTLS_DEPRECATED_NUMERIC_CONSTANT( -0x0016 )
|
|
#endif /* !MBEDTLS_DEPRECATED_REMOVED */
|
|
#define MBEDTLS_ERR_BLOWFISH_BAD_INPUT_DATA -0x0016 /**< Bad input data. */
|
|
|
|
#define MBEDTLS_ERR_BLOWFISH_INVALID_INPUT_LENGTH -0x0018 /**< Invalid data input length. */
|
|
|
|
/* MBEDTLS_ERR_BLOWFISH_HW_ACCEL_FAILED is deprecated and should not be used.
|
|
*/
|
|
#define MBEDTLS_ERR_BLOWFISH_HW_ACCEL_FAILED -0x0017 /**< Blowfish hardware accelerator failed. */
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
#if !defined(MBEDTLS_BLOWFISH_ALT)
|
|
// Regular implementation
|
|
//
|
|
|
|
/**
|
|
* \brief Blowfish context structure
|
|
*/
|
|
typedef struct mbedtls_blowfish_context
|
|
{
|
|
uint32_t P[MBEDTLS_BLOWFISH_ROUNDS + 2]; /*!< Blowfish round keys */
|
|
uint32_t S[4][256]; /*!< key dependent S-boxes */
|
|
}
|
|
mbedtls_blowfish_context;
|
|
|
|
#else /* MBEDTLS_BLOWFISH_ALT */
|
|
#include "blowfish_alt.h"
|
|
#endif /* MBEDTLS_BLOWFISH_ALT */
|
|
|
|
/**
|
|
* \brief Initialize a Blowfish context.
|
|
*
|
|
* \param ctx The Blowfish context to be initialized.
|
|
* This must not be \c NULL.
|
|
*/
|
|
void mbedtls_blowfish_init( mbedtls_blowfish_context *ctx );
|
|
|
|
/**
|
|
* \brief Clear a Blowfish context.
|
|
*
|
|
* \param ctx The Blowfish context to be cleared.
|
|
* This may be \c NULL, in which case this function
|
|
* returns immediately. If it is not \c NULL, it must
|
|
* point to an initialized Blowfish context.
|
|
*/
|
|
void mbedtls_blowfish_free( mbedtls_blowfish_context *ctx );
|
|
|
|
/**
|
|
* \brief Perform a Blowfish key schedule operation.
|
|
*
|
|
* \param ctx The Blowfish context to perform the key schedule on.
|
|
* \param key The encryption key. This must be a readable buffer of
|
|
* length \p keybits Bits.
|
|
* \param keybits The length of \p key in Bits. This must be between
|
|
* \c 32 and \c 448 and a multiple of \c 8.
|
|
*
|
|
* \return \c 0 if successful.
|
|
* \return A negative error code on failure.
|
|
*/
|
|
int mbedtls_blowfish_setkey( mbedtls_blowfish_context *ctx, const unsigned char *key,
|
|
unsigned int keybits );
|
|
|
|
/**
|
|
* \brief Perform a Blowfish-ECB block encryption/decryption operation.
|
|
*
|
|
* \param ctx The Blowfish context to use. This must be initialized
|
|
* and bound to a key.
|
|
* \param mode The mode of operation. Possible values are
|
|
* #MBEDTLS_BLOWFISH_ENCRYPT for encryption, or
|
|
* #MBEDTLS_BLOWFISH_DECRYPT for decryption.
|
|
* \param input The input block. This must be a readable buffer
|
|
* of size \c 8 Bytes.
|
|
* \param output The output block. This must be a writable buffer
|
|
* of size \c 8 Bytes.
|
|
*
|
|
* \return \c 0 if successful.
|
|
* \return A negative error code on failure.
|
|
*/
|
|
int mbedtls_blowfish_crypt_ecb( mbedtls_blowfish_context *ctx,
|
|
int mode,
|
|
const unsigned char input[MBEDTLS_BLOWFISH_BLOCKSIZE],
|
|
unsigned char output[MBEDTLS_BLOWFISH_BLOCKSIZE] );
|
|
|
|
#if defined(MBEDTLS_CIPHER_MODE_CBC)
|
|
/**
|
|
* \brief Perform a Blowfish-CBC buffer encryption/decryption operation.
|
|
*
|
|
* \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 The Blowfish context to use. This must be initialized
|
|
* and bound to a key.
|
|
* \param mode The mode of operation. Possible values are
|
|
* #MBEDTLS_BLOWFISH_ENCRYPT for encryption, or
|
|
* #MBEDTLS_BLOWFISH_DECRYPT for decryption.
|
|
* \param length The length of the input data in Bytes. This must be
|
|
* multiple of \c 8.
|
|
* \param iv The initialization vector. This must be a read/write buffer
|
|
* of length \c 8 Bytes. It is updated by this function.
|
|
* \param input The input data. This must be a readable buffer of length
|
|
* \p length Bytes.
|
|
* \param output The output data. This must be a writable buffer of length
|
|
* \p length Bytes.
|
|
*
|
|
* \return \c 0 if successful.
|
|
* \return A negative error code on failure.
|
|
*/
|
|
int mbedtls_blowfish_crypt_cbc( mbedtls_blowfish_context *ctx,
|
|
int mode,
|
|
size_t length,
|
|
unsigned char iv[MBEDTLS_BLOWFISH_BLOCKSIZE],
|
|
const unsigned char *input,
|
|
unsigned char *output );
|
|
#endif /* MBEDTLS_CIPHER_MODE_CBC */
|
|
|
|
#if defined(MBEDTLS_CIPHER_MODE_CFB)
|
|
/**
|
|
* \brief Perform a Blowfish CFB buffer encryption/decryption operation.
|
|
*
|
|
* \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 The Blowfish context to use. This must be initialized
|
|
* and bound to a key.
|
|
* \param mode The mode of operation. Possible values are
|
|
* #MBEDTLS_BLOWFISH_ENCRYPT for encryption, or
|
|
* #MBEDTLS_BLOWFISH_DECRYPT for decryption.
|
|
* \param length The length of the input data in Bytes.
|
|
* \param iv_off The offset in the initialiation vector.
|
|
* The value pointed to must be smaller than \c 8 Bytes.
|
|
* It is updated by this function to support the aforementioned
|
|
* streaming usage.
|
|
* \param iv The initialization vector. This must be a read/write buffer
|
|
* of size \c 8 Bytes. It is updated after use.
|
|
* \param input The input data. This must be a readable buffer of length
|
|
* \p length Bytes.
|
|
* \param output The output data. This must be a writable buffer of length
|
|
* \p length Bytes.
|
|
*
|
|
* \return \c 0 if successful.
|
|
* \return A negative error code on failure.
|
|
*/
|
|
int mbedtls_blowfish_crypt_cfb64( mbedtls_blowfish_context *ctx,
|
|
int mode,
|
|
size_t length,
|
|
size_t *iv_off,
|
|
unsigned char iv[MBEDTLS_BLOWFISH_BLOCKSIZE],
|
|
const unsigned char *input,
|
|
unsigned char *output );
|
|
#endif /*MBEDTLS_CIPHER_MODE_CFB */
|
|
|
|
#if defined(MBEDTLS_CIPHER_MODE_CTR)
|
|
/**
|
|
* \brief Perform a Blowfish-CTR buffer encryption/decryption operation.
|
|
*
|
|
* \warning You must never reuse a nonce value with the same key. Doing so
|
|
* would void the encryption for the two messages encrypted with
|
|
* the same nonce and key.
|
|
*
|
|
* There are two common strategies for managing nonces with CTR:
|
|
*
|
|
* 1. You can handle everything as a single message processed over
|
|
* successive calls to this function. In that case, you want to
|
|
* set \p nonce_counter and \p nc_off to 0 for the first call, and
|
|
* then preserve the values of \p nonce_counter, \p nc_off and \p
|
|
* stream_block across calls to this function as they will be
|
|
* updated by this function.
|
|
*
|
|
* With this strategy, you must not encrypt more than 2**64
|
|
* blocks of data with the same key.
|
|
*
|
|
* 2. You can encrypt separate messages by dividing the \p
|
|
* nonce_counter buffer in two areas: the first one used for a
|
|
* per-message nonce, handled by yourself, and the second one
|
|
* updated by this function internally.
|
|
*
|
|
* For example, you might reserve the first 4 bytes for the
|
|
* per-message nonce, and the last 4 bytes for internal use. In that
|
|
* case, before calling this function on a new message you need to
|
|
* set the first 4 bytes of \p nonce_counter to your chosen nonce
|
|
* value, the last 4 to 0, and \p nc_off to 0 (which will cause \p
|
|
* stream_block to be ignored). That way, you can encrypt at most
|
|
* 2**32 messages of up to 2**32 blocks each with the same key.
|
|
*
|
|
* The per-message nonce (or information sufficient to reconstruct
|
|
* it) needs to be communicated with the ciphertext and must be unique.
|
|
* The recommended way to ensure uniqueness is to use a message
|
|
* counter.
|
|
*
|
|
* Note that for both stategies, sizes are measured in blocks and
|
|
* that a Blowfish block is 8 bytes.
|
|
*
|
|
* \warning Upon return, \p stream_block contains sensitive data. Its
|
|
* content must not be written to insecure storage and should be
|
|
* securely discarded as soon as it's no longer needed.
|
|
*
|
|
* \param ctx The Blowfish context to use. This must be initialized
|
|
* and bound to a key.
|
|
* \param length The length of the input data in Bytes.
|
|
* \param nc_off The offset in the current stream_block (for resuming
|
|
* within current cipher stream). The offset pointer
|
|
* should be \c 0 at the start of a stream and must be
|
|
* smaller than \c 8. It is updated by this function.
|
|
* \param nonce_counter The 64-bit nonce and counter. This must point to a
|
|
* read/write buffer of length \c 8 Bytes.
|
|
* \param stream_block The saved stream-block for resuming. This must point to
|
|
* a read/write buffer of length \c 8 Bytes.
|
|
* \param input The input data. This must be a readable buffer of
|
|
* length \p length Bytes.
|
|
* \param output The output data. This must be a writable buffer of
|
|
* length \p length Bytes.
|
|
*
|
|
* \return \c 0 if successful.
|
|
* \return A negative error code on failure.
|
|
*/
|
|
int mbedtls_blowfish_crypt_ctr( mbedtls_blowfish_context *ctx,
|
|
size_t length,
|
|
size_t *nc_off,
|
|
unsigned char nonce_counter[MBEDTLS_BLOWFISH_BLOCKSIZE],
|
|
unsigned char stream_block[MBEDTLS_BLOWFISH_BLOCKSIZE],
|
|
const unsigned char *input,
|
|
unsigned char *output );
|
|
#endif /* MBEDTLS_CIPHER_MODE_CTR */
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* blowfish.h */
|