Mbed TLS v3.6.2
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cmac.h
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1
10/*
11 * Copyright The Mbed TLS Contributors
12 * SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
13 */
14
15#ifndef MBEDTLS_CMAC_H
16#define MBEDTLS_CMAC_H
18
19#include "mbedtls/build_info.h"
20
21#include "mbedtls/cipher.h"
22
23#ifdef __cplusplus
24extern "C" {
25#endif
26
27#define MBEDTLS_AES_BLOCK_SIZE 16
28#define MBEDTLS_DES3_BLOCK_SIZE 8
29
30/* We don't support Camellia or ARIA in this module */
31#if defined(MBEDTLS_AES_C)
32#define MBEDTLS_CMAC_MAX_BLOCK_SIZE 16
33#else
34#define MBEDTLS_CMAC_MAX_BLOCK_SIZE 8
35#endif
36
37#if !defined(MBEDTLS_DEPRECATED_REMOVED)
46/* Before Mbed TLS 3.5, this was the maximum block size supported by the CMAC
47 * module, so it didn't take Camellia or ARIA into account. Since the name
48 * of the macro doesn't even convey "CMAC", this was misleading. Now the size
49 * is sufficient for any cipher, but the name is defined in cmac.h for
50 * backward compatibility. */
51#define MBEDTLS_CIPHER_BLKSIZE_MAX MBEDTLS_MAX_BLOCK_LENGTH
52#endif /* MBEDTLS_DEPRECATED_REMOVED */
53
54#if !defined(MBEDTLS_CMAC_ALT)
55
62
65 unsigned char MBEDTLS_PRIVATE(unprocessed_block)[MBEDTLS_CMAC_MAX_BLOCK_SIZE];
66
68 size_t MBEDTLS_PRIVATE(unprocessed_len);
69};
70
71#else /* !MBEDTLS_CMAC_ALT */
72#include "cmac_alt.h"
73#endif /* !MBEDTLS_CMAC_ALT */
74
106 const unsigned char *key, size_t keybits);
107
131 const unsigned char *input, size_t ilen);
132
150 unsigned char *output);
151
169
198 const unsigned char *key, size_t keylen,
199 const unsigned char *input, size_t ilen,
200 unsigned char *output);
201
202#if defined(MBEDTLS_AES_C)
220int mbedtls_aes_cmac_prf_128(const unsigned char *key, size_t key_len,
221 const unsigned char *input, size_t in_len,
222 unsigned char output[16]);
223#endif /* MBEDTLS_AES_C */
224
225#if defined(MBEDTLS_SELF_TEST) && (defined(MBEDTLS_AES_C) || defined(MBEDTLS_DES_C))
239int mbedtls_cmac_self_test(int verbose);
240#endif /* MBEDTLS_SELF_TEST && ( MBEDTLS_AES_C || MBEDTLS_DES_C ) */
241
242#ifdef __cplusplus
243}
244#endif
245
246#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:32
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)