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/**
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* \file cmac.h
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*
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* \brief The CMAC Mode for Authentication
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*
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* Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed under the Apache License, Version 2.0 (the "License"); you may
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* not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* This file is part of mbed TLS (https://tls.mbed.org)
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*/
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#ifndef MBEDTLS_CMAC_H
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#define MBEDTLS_CMAC_H
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#include "cipher.h"
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#define MBEDTLS_ERR_CMAC_BAD_INPUT -0x0011 /**< Bad input parameters to function. */
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#define MBEDTLS_ERR_CMAC_VERIFY_FAILED -0x0013 /**< Verification failed. */
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* \brief CCM context structure
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*/
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typedef struct {
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mbedtls_cipher_context_t cipher_ctx; /*!< cipher context used */
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unsigned char K1[16];
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unsigned char K2[16];
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}
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mbedtls_cmac_context;
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/**
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* \brief Initialize CMAC context (just makes references valid)
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* Makes the context ready for mbedtls_cmac_setkey() or
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* mbedtls_cmac_free().
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*
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* \param ctx CMAC context to initialize
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*/
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void mbedtls_cmac_init( mbedtls_cmac_context *ctx );
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/**
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* \brief CMAC initialization
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*
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* \param ctx CMAC context to be initialized
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* \param cipher cipher to use (a 128-bit block cipher)
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* \param key encryption key
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* \param keybits key size in bits (must be acceptable by the cipher)
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*
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* \return 0 if successful, or a cipher specific error code
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*/
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int mbedtls_cmac_setkey( mbedtls_cmac_context *ctx,
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mbedtls_cipher_id_t cipher,
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const unsigned char *key,
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unsigned int keybits );
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/**
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* \brief Free a CMAC context and underlying cipher sub-context
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*
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* \param ctx CMAC context to free
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*/
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void mbedtls_cmac_free( mbedtls_cmac_context *ctx );
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/**
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* \brief CMAC generate
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*
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* \param ctx CMAC context
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* \param length length of the input data in bytes
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* \param input buffer holding the input data
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* \param tag buffer for holding the generated tag
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* \param tag_len length of the tag to generate in bytes
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* must be between 4, 6, 8, 10, 14 or 16
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*
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* \return 0 if successful
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*/
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int mbedtls_cmac_generate( mbedtls_cmac_context *ctx, size_t length,
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const unsigned char *input,
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unsigned char *tag, size_t tag_len );
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/**
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* \brief CMAC verify
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*
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* \param ctx CMAC context
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* \param length length of the input data in bytes
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* \param input buffer holding the input data
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* \param tag buffer holding the tag to verify
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* \param tag_len length of the tag to verify in bytes
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* must be 4, 6, 8, 10, 14 or 16
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*
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* \return 0 if successful and authenticated,
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* MBEDTLS_ERR_CMAC_VERIFY_FAILED if tag does not match
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*/
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int mbedtls_cmac_verify( mbedtls_cmac_context *ctx, size_t length,
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const unsigned char *input,
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const unsigned char *tag, size_t tag_len );
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/**
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* \brief AES-CMAC-128-PRF
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*
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* \param ctx CMAC context
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* \param length length of the input data in bytes
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* \param key PRF key
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* \param key_len PRF key length
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* \param input buffer holding the input data
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* \param tag buffer holding the tag to verify (16 bytes)
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*
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* \return 0 if successful
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*/
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int mbedtls_aes_cmac_prf_128( mbedtls_cmac_context *ctx, size_t length,
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const unsigned char *key, size_t key_len,
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const unsigned char *input,
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unsigned char *tag );
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#if defined(MBEDTLS_SELF_TEST) && defined(MBEDTLS_AES_C)
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/**
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* \brief Checkup routine
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*
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* \return 0 if successful, or 1 if the test failed
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*/
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int mbedtls_cmac_self_test( int verbose );
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#endif /* MBEDTLS_SELF_TEST && MBEDTLS_AES_C */
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#ifdef __cplusplus
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}
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#endif
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#endif /* MBEDTLS_CMAC_H */
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/**
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* \file cmac.h
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*
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* \brief The CMAC Mode for Authentication
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*
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* Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed under the Apache License, Version 2.0 (the "License"); you may
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* not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* This file is part of mbed TLS (https://tls.mbed.org)
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*/
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#ifndef MBEDTLS_CMAC_H
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#define MBEDTLS_CMAC_H
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#include "cipher.h"
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#define MBEDTLS_ERR_CMAC_BAD_INPUT -0x0011 /**< Bad input parameters to function. */
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#define MBEDTLS_ERR_CMAC_VERIFY_FAILED -0x0013 /**< Verification failed. */
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* \brief CCM context structure
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*/
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typedef struct {
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mbedtls_cipher_context_t cipher_ctx; /*!< cipher context used */
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unsigned char K1[16];
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unsigned char K2[16];
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}
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mbedtls_cmac_context;
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/**
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* \brief Initialize CMAC context (just makes references valid)
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* Makes the context ready for mbedtls_cmac_setkey() or
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* mbedtls_cmac_free().
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*
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* \param ctx CMAC context to initialize
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*/
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void mbedtls_cmac_init( mbedtls_cmac_context *ctx );
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/**
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* \brief CMAC initialization
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*
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* \param ctx CMAC context to be initialized
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* \param cipher cipher to use (a 128-bit block cipher)
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* \param key encryption key
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* \param keybits key size in bits (must be acceptable by the cipher)
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*
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* \return 0 if successful, or a cipher specific error code
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*/
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int mbedtls_cmac_setkey( mbedtls_cmac_context *ctx,
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mbedtls_cipher_id_t cipher,
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const unsigned char *key,
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unsigned int keybits );
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/**
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* \brief Free a CMAC context and underlying cipher sub-context
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*
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* \param ctx CMAC context to free
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*/
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void mbedtls_cmac_free( mbedtls_cmac_context *ctx );
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/**
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* \brief CMAC generate
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*
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* \param ctx CMAC context
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* \param length length of the input data in bytes
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* \param input buffer holding the input data
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* \param tag buffer for holding the generated tag
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* \param tag_len length of the tag to generate in bytes
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* must be between 4, 6, 8, 10, 14 or 16
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*
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* \return 0 if successful
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*/
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int mbedtls_cmac_generate( mbedtls_cmac_context *ctx, size_t length,
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const unsigned char *input,
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unsigned char *tag, size_t tag_len );
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/**
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* \brief CMAC verify
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*
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* \param ctx CMAC context
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* \param length length of the input data in bytes
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* \param input buffer holding the input data
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* \param tag buffer holding the tag to verify
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* \param tag_len length of the tag to verify in bytes
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* must be 4, 6, 8, 10, 14 or 16
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*
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* \return 0 if successful and authenticated,
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* MBEDTLS_ERR_CMAC_VERIFY_FAILED if tag does not match
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*/
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int mbedtls_cmac_verify( mbedtls_cmac_context *ctx, size_t length,
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const unsigned char *input,
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const unsigned char *tag, size_t tag_len );
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/**
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* \brief AES-CMAC-128-PRF
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*
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* \param ctx CMAC context
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* \param length length of the input data in bytes
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* \param key PRF key
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* \param key_len PRF key length
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* \param input buffer holding the input data
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* \param tag buffer holding the tag to verify (16 bytes)
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*
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* \return 0 if successful
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*/
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int mbedtls_aes_cmac_prf_128( mbedtls_cmac_context *ctx, size_t length,
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const unsigned char *key, size_t key_len,
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const unsigned char *input,
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unsigned char *tag );
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#if defined(MBEDTLS_SELF_TEST) && defined(MBEDTLS_AES_C)
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/**
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* \brief Checkup routine
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*
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* \return 0 if successful, or 1 if the test failed
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*/
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int mbedtls_cmac_self_test( int verbose );
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#endif /* MBEDTLS_SELF_TEST && MBEDTLS_AES_C */
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#ifdef __cplusplus
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}
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#endif
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#endif /* MBEDTLS_CMAC_H */
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1054
library/cmac.c
1054
library/cmac.c
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