Mbed TLS v3.5.0
cmac.h
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1
10/*
11 * Copyright The Mbed TLS Contributors
12 * SPDX-License-Identifier: Apache-2.0
13 *
14 * Licensed under the Apache License, Version 2.0 (the "License"); you may
15 * not use this file except in compliance with the License.
16 * You may obtain a copy of the License at
17 *
18 * http://www.apache.org/licenses/LICENSE-2.0
19 *
20 * Unless required by applicable law or agreed to in writing, software
21 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
22 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
23 * See the License for the specific language governing permissions and
24 * limitations under the License.
25 */
26
27#ifndef MBEDTLS_CMAC_H
28#define MBEDTLS_CMAC_H
30
31#include "mbedtls/build_info.h"
32
33#include "mbedtls/cipher.h"
34
35#ifdef __cplusplus
36extern "C" {
37#endif
38
39#define MBEDTLS_AES_BLOCK_SIZE 16
40#define MBEDTLS_DES3_BLOCK_SIZE 8
41
42/* We don't support Camellia or ARIA in this module */
43#if defined(MBEDTLS_AES_C)
44#define MBEDTLS_CMAC_MAX_BLOCK_SIZE 16
45#else
46#define MBEDTLS_CMAC_MAX_BLOCK_SIZE 8
47#endif
48
49#if !defined(MBEDTLS_DEPRECATED_REMOVED)
58/* Before Mbed TLS 3.5, this was the maximum block size supported by the CMAC
59 * module, so it didn't take Camellia or ARIA into account. Since the name
60 * of the macro doesn't even convey "CMAC", this was misleading. Now the size
61 * is sufficient for any cipher, but the name is defined in cmac.h for
62 * backward compatibility. */
63#define MBEDTLS_CIPHER_BLKSIZE_MAX MBEDTLS_MAX_BLOCK_LENGTH
64#endif /* MBEDTLS_DEPRECATED_REMOVED */
65
66#if !defined(MBEDTLS_CMAC_ALT)
67
74
77 unsigned char MBEDTLS_PRIVATE(unprocessed_block)[MBEDTLS_CMAC_MAX_BLOCK_SIZE];
78
80 size_t MBEDTLS_PRIVATE(unprocessed_len);
81};
82
83#else /* !MBEDTLS_CMAC_ALT */
84#include "cmac_alt.h"
85#endif /* !MBEDTLS_CMAC_ALT */
86
118 const unsigned char *key, size_t keybits);
119
143 const unsigned char *input, size_t ilen);
144
162 unsigned char *output);
163
181
210 const unsigned char *key, size_t keylen,
211 const unsigned char *input, size_t ilen,
212 unsigned char *output);
213
214#if defined(MBEDTLS_AES_C)
232int mbedtls_aes_cmac_prf_128(const unsigned char *key, size_t key_len,
233 const unsigned char *input, size_t in_len,
234 unsigned char output[16]);
235#endif /* MBEDTLS_AES_C */
236
237#if defined(MBEDTLS_SELF_TEST) && (defined(MBEDTLS_AES_C) || defined(MBEDTLS_DES_C))
251int mbedtls_cmac_self_test(int verbose);
252#endif /* MBEDTLS_SELF_TEST && ( MBEDTLS_AES_C || MBEDTLS_DES_C ) */
253
254#ifdef __cplusplus
255}
256#endif
257
258#endif /* MBEDTLS_CMAC_H */
This file contains an abstraction interface for use with the cipher primitives provided by the librar...
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.
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.
int mbedtls_cmac_self_test(int verbose)
The CMAC checkup routine.
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.
#define MBEDTLS_CMAC_MAX_BLOCK_SIZE
Definition: cmac.h:44
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...
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...
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.
Build-time configuration info.
Macro wrapper for struct's members.
#define MBEDTLS_PRIVATE(member)