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cmac.h
Go to the documentation of this file.
/*
* Copyright The Mbed TLS Contributors
* SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
*/
#ifndef MBEDTLS_CMAC_H
#define MBEDTLS_CMAC_H
#if !defined(MBEDTLS_CONFIG_FILE)
#include "mbedtls/config.h"
#else
#include MBEDTLS_CONFIG_FILE
#endif
#include "mbedtls/cipher.h"
#ifdef __cplusplus
extern "C" {
#endif
/* MBEDTLS_ERR_CMAC_HW_ACCEL_FAILED is deprecated and should not be used. */
#define MBEDTLS_ERR_CMAC_HW_ACCEL_FAILED -0x007A
#define MBEDTLS_AES_BLOCK_SIZE 16
#define MBEDTLS_DES3_BLOCK_SIZE 8
/* Although the CMAC module does not support ARIA or CAMELLIA, we adjust the value of
* MBEDTLS_CIPHER_BLKSIZE_MAX to reflect these ciphers.
* This is done to avoid confusion, given the general-purpose name of the macro. */
#if defined(MBEDTLS_AES_C) || defined(MBEDTLS_ARIA_C) || defined(MBEDTLS_CAMELLIA_C)
#define MBEDTLS_CIPHER_BLKSIZE_MAX 16
#else
#define MBEDTLS_CIPHER_BLKSIZE_MAX 8
#endif
#if !defined(MBEDTLS_CMAC_ALT)
struct mbedtls_cmac_context_t {
unsigned char state[MBEDTLS_CIPHER_BLKSIZE_MAX];
unsigned char unprocessed_block[MBEDTLS_CIPHER_BLKSIZE_MAX];
size_t unprocessed_len;
};
#else /* !MBEDTLS_CMAC_ALT */
#include "cmac_alt.h"
#endif /* !MBEDTLS_CMAC_ALT */
int mbedtls_cipher_cmac_starts(mbedtls_cipher_context_t *ctx,
const unsigned char *key, size_t keybits);
int mbedtls_cipher_cmac_update(mbedtls_cipher_context_t *ctx,
const unsigned char *input, size_t ilen);
int mbedtls_cipher_cmac_finish(mbedtls_cipher_context_t *ctx,
unsigned char *output);
int mbedtls_cipher_cmac_reset(mbedtls_cipher_context_t *ctx);
int mbedtls_cipher_cmac(const mbedtls_cipher_info_t *cipher_info,
const unsigned char *key, size_t keylen,
const unsigned char *input, size_t ilen,
unsigned char *output);
#if defined(MBEDTLS_AES_C)
int mbedtls_aes_cmac_prf_128(const unsigned char *key, size_t key_len,
const unsigned char *input, size_t in_len,
unsigned char output[16]);
#endif /* MBEDTLS_AES_C */
#if defined(MBEDTLS_SELF_TEST) && (defined(MBEDTLS_AES_C) || defined(MBEDTLS_DES_C))
int mbedtls_cmac_self_test(int verbose);
#endif /* MBEDTLS_SELF_TEST && ( MBEDTLS_AES_C || MBEDTLS_DES_C ) */
#ifdef __cplusplus
}
#endif
#endif /* MBEDTLS_CMAC_H */
cipher.h
This file contains an abstraction interface for use with the cipher primitives provided by the librar...
mbedtls_cipher_cmac_update
int mbedtls_cipher_cmac_update(mbedtls_cipher_context_t *ctx, const unsigned char *input, size_t ilen)
This function feeds an input buffer into an ongoing CMAC computation.
mbedtls_cipher_cmac_reset
int mbedtls_cipher_cmac_reset(mbedtls_cipher_context_t *ctx)
This function starts a new CMAC operation with the same key as the previous one.
mbedtls_cmac_self_test
int mbedtls_cmac_self_test(int verbose)
The CMAC checkup routine.
mbedtls_cipher_cmac_finish
int mbedtls_cipher_cmac_finish(mbedtls_cipher_context_t *ctx, unsigned char *output)
This function finishes an ongoing CMAC operation, and writes the result to the output buffer.
MBEDTLS_CIPHER_BLKSIZE_MAX
#define MBEDTLS_CIPHER_BLKSIZE_MAX
Definition cmac.h:41
mbedtls_aes_cmac_prf_128
int mbedtls_aes_cmac_prf_128(const unsigned char *key, size_t key_len, const unsigned char *input, size_t in_len, unsigned char output[16])
This function implements the AES-CMAC-PRF-128 pseudorandom function, as defined in RFC-4615: The Adva...
mbedtls_cipher_cmac_starts
int mbedtls_cipher_cmac_starts(mbedtls_cipher_context_t *ctx, const unsigned char *key, size_t keybits)
This function starts a new CMAC computation by setting the CMAC key, and preparing to authenticate th...
mbedtls_cipher_cmac
int mbedtls_cipher_cmac(const mbedtls_cipher_info_t *cipher_info, const unsigned char *key, size_t keylen, const unsigned char *input, size_t ilen, unsigned char *output)
This function calculates the full generic CMAC on the input buffer with the provided key.
config.h
Configuration options (set of defines)
mbedtls_cipher_context_t
Definition cipher.h:305
mbedtls_cipher_info_t
Definition cipher.h:264
mbedtls_cmac_context_t
Definition cmac.h:51
mbedtls_cmac_context_t::unprocessed_block
unsigned char unprocessed_block[MBEDTLS_CIPHER_BLKSIZE_MAX]
Definition cmac.h:57
mbedtls_cmac_context_t::unprocessed_len
size_t unprocessed_len
Definition cmac.h:60
mbedtls_cmac_context_t::state
unsigned char state[MBEDTLS_CIPHER_BLKSIZE_MAX]
Definition cmac.h:53