| /** |
| * \file camellia.h |
| * |
| * \brief Camellia 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 TLS (https://tls.mbed.org) |
| */ |
| #ifndef MBEDTLS_CAMELLIA_H |
| #define MBEDTLS_CAMELLIA_H |
| |
| #if !defined(MBEDTLS_CONFIG_FILE) |
| #include "config.h" |
| #else |
| #include MBEDTLS_CONFIG_FILE |
| #endif |
| |
| #include <stddef.h> |
| #include <stdint.h> |
| |
| #define MBEDTLS_CAMELLIA_ENCRYPT 1 |
| #define MBEDTLS_CAMELLIA_DECRYPT 0 |
| |
| #define MBEDTLS_ERR_CAMELLIA_INVALID_KEY_LENGTH -0x0024 /**< Invalid key length. */ |
| #define MBEDTLS_ERR_CAMELLIA_INVALID_INPUT_LENGTH -0x0026 /**< Invalid data input length. */ |
| #define MBEDTLS_ERR_CAMELLIA_HW_ACCEL_FAILED -0x0027 /**< Camellia hardware accelerator failed. */ |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| #if !defined(MBEDTLS_CAMELLIA_ALT) |
| // Regular implementation |
| // |
| |
| /** |
| * \brief CAMELLIA context structure |
| */ |
| typedef struct mbedtls_camellia_context |
| { |
| int nr; /*!< number of rounds */ |
| uint32_t rk[68]; /*!< CAMELLIA round keys */ |
| } |
| mbedtls_camellia_context; |
| |
| #else /* MBEDTLS_CAMELLIA_ALT */ |
| #include "camellia_alt.h" |
| #endif /* MBEDTLS_CAMELLIA_ALT */ |
| |
| /** |
| * \brief Initialize CAMELLIA context |
| * |
| * \param ctx CAMELLIA context to be initialized |
| */ |
| void mbedtls_camellia_init( mbedtls_camellia_context *ctx ); |
| |
| /** |
| * \brief Clear CAMELLIA context |
| * |
| * \param ctx CAMELLIA context to be cleared |
| */ |
| void mbedtls_camellia_free( mbedtls_camellia_context *ctx ); |
| |
| /** |
| * \brief CAMELLIA key schedule (encryption) |
| * |
| * \param ctx CAMELLIA context to be initialized |
| * \param key encryption key |
| * \param keybits must be 128, 192 or 256 |
| * |
| * \return 0 if successful, or MBEDTLS_ERR_CAMELLIA_INVALID_KEY_LENGTH |
| */ |
| int mbedtls_camellia_setkey_enc( mbedtls_camellia_context *ctx, const unsigned char *key, |
| unsigned int keybits ); |
| |
| /** |
| * \brief CAMELLIA key schedule (decryption) |
| * |
| * \param ctx CAMELLIA context to be initialized |
| * \param key decryption key |
| * \param keybits must be 128, 192 or 256 |
| * |
| * \return 0 if successful, or MBEDTLS_ERR_CAMELLIA_INVALID_KEY_LENGTH |
| */ |
| int mbedtls_camellia_setkey_dec( mbedtls_camellia_context *ctx, const unsigned char *key, |
| unsigned int keybits ); |
| |
| /** |
| * \brief CAMELLIA-ECB block encryption/decryption |
| * |
| * \param ctx CAMELLIA context |
| * \param mode MBEDTLS_CAMELLIA_ENCRYPT or MBEDTLS_CAMELLIA_DECRYPT |
| * \param input 16-byte input block |
| * \param output 16-byte output block |
| * |
| * \return 0 if successful |
| */ |
| int mbedtls_camellia_crypt_ecb( mbedtls_camellia_context *ctx, |
| int mode, |
| const unsigned char input[16], |
| unsigned char output[16] ); |
| |
| #if defined(MBEDTLS_CIPHER_MODE_CBC) |
| /** |
| * \brief CAMELLIA-CBC buffer encryption/decryption |
| * Length should be a multiple of the block |
| * size (16 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 CAMELLIA context |
| * \param mode MBEDTLS_CAMELLIA_ENCRYPT or MBEDTLS_CAMELLIA_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 |
| * MBEDTLS_ERR_CAMELLIA_INVALID_INPUT_LENGTH |
| */ |
| int mbedtls_camellia_crypt_cbc( mbedtls_camellia_context *ctx, |
| int mode, |
| size_t length, |
| unsigned char iv[16], |
| const unsigned char *input, |
| unsigned char *output ); |
| #endif /* MBEDTLS_CIPHER_MODE_CBC */ |
| |
| #if defined(MBEDTLS_CIPHER_MODE_CFB) |
| /** |
| * \brief CAMELLIA-CFB128 buffer encryption/decryption |
| * |
| * Note: Due to the nature of CFB you should use the same key schedule for |
| * both encryption and decryption. So a context initialized with |
| * mbedtls_camellia_setkey_enc() for both MBEDTLS_CAMELLIA_ENCRYPT and CAMELLIE_DECRYPT. |
| * |
| * \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 CAMELLIA context |
| * \param mode MBEDTLS_CAMELLIA_ENCRYPT or MBEDTLS_CAMELLIA_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, or |
| * MBEDTLS_ERR_CAMELLIA_INVALID_INPUT_LENGTH |
| */ |
| int mbedtls_camellia_crypt_cfb128( mbedtls_camellia_context *ctx, |
| int mode, |
| size_t length, |
| size_t *iv_off, |
| unsigned char iv[16], |
| const unsigned char *input, |
| unsigned char *output ); |
| #endif /* MBEDTLS_CIPHER_MODE_CFB */ |
| |
| #if defined(MBEDTLS_CIPHER_MODE_CTR) |
| /** |
| * \brief CAMELLIA-CTR buffer encryption/decryption |
| * |
| * Note: Due to the nature of CTR you should use the same key schedule for |
| * both encryption and decryption. So a context initialized with |
| * mbedtls_camellia_setkey_enc() for both MBEDTLS_CAMELLIA_ENCRYPT and MBEDTLS_CAMELLIA_DECRYPT. |
| * |
| * \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**128 |
| * 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 12 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 12 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**96 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. An alternative is to generate random nonces, but this |
| * limits the number of messages that can be securely encrypted: |
| * for example, with 96-bit random nonces, you should not encrypt |
| * more than 2**32 messages with the same key. |
| * |
| * Note that for both stategies, sizes are measured in blocks and |
| * that a CAMELLIA block is 16 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 CAMELLIA 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 128-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 mbedtls_camellia_crypt_ctr( mbedtls_camellia_context *ctx, |
| size_t length, |
| size_t *nc_off, |
| unsigned char nonce_counter[16], |
| unsigned char stream_block[16], |
| const unsigned char *input, |
| unsigned char *output ); |
| #endif /* MBEDTLS_CIPHER_MODE_CTR */ |
| |
| /** |
| * \brief Checkup routine |
| * |
| * \return 0 if successful, or 1 if the test failed |
| */ |
| int mbedtls_camellia_self_test( int verbose ); |
| |
| #ifdef __cplusplus |
| } |
| #endif |
| |
| #endif /* camellia.h */ |