1#ifndef HEADER_CURL_HMAC_H
2#define HEADER_CURL_HMAC_H
3/***************************************************************************
4 * _ _ ____ _
5 * Project ___| | | | _ \| |
6 * / __| | | | |_) | |
7 * | (__| |_| | _ <| |___
8 * \___|\___/|_| \_\_____|
9 *
10 * Copyright (C) 1998 - 2022, Daniel Stenberg, <[email protected]>, et al.
11 *
12 * This software is licensed as described in the file COPYING, which
13 * you should have received as part of this distribution. The terms
14 * are also available at https://curl.se/docs/copyright.html.
15 *
16 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
17 * copies of the Software, and permit persons to whom the Software is
18 * furnished to do so, under the terms of the COPYING file.
19 *
20 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
21 * KIND, either express or implied.
22 *
23 * SPDX-License-Identifier: curl
24 *
25 ***************************************************************************/
26
27#ifndef CURL_DISABLE_CRYPTO_AUTH
28
29#define HMAC_MD5_LENGTH 16
30
31typedef CURLcode (* HMAC_hinit_func)(void *context);
32typedef void (* HMAC_hupdate_func)(void *context,
33 const unsigned char *data,
34 unsigned int len);
35typedef void (* HMAC_hfinal_func)(unsigned char *result, void *context);
36
37
38/* Per-hash function HMAC parameters. */
39struct HMAC_params {
40 HMAC_hinit_func
41 hmac_hinit; /* Initialize context procedure. */
42 HMAC_hupdate_func hmac_hupdate; /* Update context with data. */
43 HMAC_hfinal_func hmac_hfinal; /* Get final result procedure. */
44 unsigned int hmac_ctxtsize; /* Context structure size. */
45 unsigned int hmac_maxkeylen; /* Maximum key length (bytes). */
46 unsigned int hmac_resultlen; /* Result length (bytes). */
47};
48
49
50/* HMAC computation context. */
51struct HMAC_context {
52 const struct HMAC_params *hmac_hash; /* Hash function definition. */
53 void *hmac_hashctxt1; /* Hash function context 1. */
54 void *hmac_hashctxt2; /* Hash function context 2. */
55};
56
57
58/* Prototypes. */
59struct HMAC_context *Curl_HMAC_init(const struct HMAC_params *hashparams,
60 const unsigned char *key,
61 unsigned int keylen);
62int Curl_HMAC_update(struct HMAC_context *context,
63 const unsigned char *data,
64 unsigned int len);
65int Curl_HMAC_final(struct HMAC_context *context, unsigned char *result);
66
67CURLcode Curl_hmacit(const struct HMAC_params *hashparams,
68 const unsigned char *key, const size_t keylen,
69 const unsigned char *data, const size_t datalen,
70 unsigned char *output);
71
72#endif
73
74#endif /* HEADER_CURL_HMAC_H */
75