| /** |
| * \file cmac.h |
| * |
| * \brief The CMAC Mode for Authentication |
| * |
| * 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_CMAC_H |
| #define MBEDTLS_CMAC_H |
| |
| #include "cipher.h" |
| |
| #define MBEDTLS_ERR_CMAC_BAD_INPUT -0x0011 /**< Bad input parameters to function. */ |
| #define MBEDTLS_ERR_CMAC_VERIFY_FAILED -0x0013 /**< Verification failed. */ |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| /** |
| * \brief CCM context structure |
| */ |
| typedef struct { |
| mbedtls_cipher_context_t cipher_ctx; /*!< cipher context used */ |
| unsigned char K1[16]; |
| unsigned char K2[16]; |
| } |
| mbedtls_cmac_context; |
| |
| /** |
| * \brief Initialize CMAC context (just makes references valid) |
| * Makes the context ready for mbedtls_cmac_setkey() or |
| * mbedtls_cmac_free(). |
| * |
| * \param ctx CMAC context to initialize |
| */ |
| void mbedtls_cmac_init( mbedtls_cmac_context *ctx ); |
| |
| /** |
| * \brief CMAC initialization |
| * |
| * \param ctx CMAC context to be initialized |
| * \param cipher cipher to use (a 128-bit block cipher) |
| * \param key encryption key |
| * \param keybits key size in bits (must be acceptable by the cipher) |
| * |
| * \return 0 if successful, or a cipher specific error code |
| */ |
| int mbedtls_cmac_setkey( mbedtls_cmac_context *ctx, |
| mbedtls_cipher_id_t cipher, |
| const unsigned char *key, |
| unsigned int keybits ); |
| |
| /** |
| * \brief Free a CMAC context and underlying cipher sub-context |
| * |
| * \param ctx CMAC context to free |
| */ |
| void mbedtls_cmac_free( mbedtls_cmac_context *ctx ); |
| |
| /** |
| * \brief CMAC generate |
| * |
| * \param ctx CMAC context |
| * \param length length of the input data in bytes |
| * \param input buffer holding the input data |
| * \param tag buffer for holding the generated tag |
| * \param tag_len length of the tag to generate in bytes |
| * must be between 4, 6, 8, 10, 14 or 16 |
| * |
| * \return 0 if successful |
| */ |
| int mbedtls_cmac_generate( mbedtls_cmac_context *ctx, size_t length, |
| const unsigned char *input, |
| unsigned char *tag, size_t tag_len ); |
| |
| /** |
| * \brief CMAC verify |
| * |
| * \param ctx CMAC context |
| * \param length length of the input data in bytes |
| * \param input buffer holding the input data |
| * \param tag buffer holding the tag to verify |
| * \param tag_len length of the tag to verify in bytes |
| * must be 4, 6, 8, 10, 14 or 16 |
| * |
| * \return 0 if successful and authenticated, |
| * MBEDTLS_ERR_CMAC_VERIFY_FAILED if tag does not match |
| */ |
| int mbedtls_cmac_verify( mbedtls_cmac_context *ctx, size_t length, |
| const unsigned char *input, |
| const unsigned char *tag, size_t tag_len ); |
| |
| /** |
| * \brief AES-CMAC-128-PRF |
| * |
| * \param ctx CMAC context |
| * \param length length of the input data in bytes |
| * \param key PRF key |
| * \param key_len PRF key length |
| * \param input buffer holding the input data |
| * \param tag buffer holding the tag to verify (16 bytes) |
| * |
| * \return 0 if successful |
| */ |
| int mbedtls_aes_cmac_prf_128( mbedtls_cmac_context *ctx, size_t length, |
| const unsigned char *key, size_t key_len, |
| const unsigned char *input, |
| unsigned char *tag ); |
| |
| #if defined(MBEDTLS_SELF_TEST) && defined(MBEDTLS_AES_C) |
| /** |
| * \brief Checkup routine |
| * |
| * \return 0 if successful, or 1 if the test failed |
| */ |
| int mbedtls_cmac_self_test( int verbose ); |
| #endif /* MBEDTLS_SELF_TEST && MBEDTLS_AES_C */ |
| |
| #ifdef __cplusplus |
| } |
| #endif |
| |
| #endif /* MBEDTLS_CMAC_H */ |