1#ifndef HEADER_CURL_HMAC_H
2#define HEADER_CURL_HMAC_H
3/***************************************************************************
4 * _ _ ____ _
5 * Project ___| | | | _ \| |
6 * / __| | | | |_) | |
7 * | (__| |_| | _ <| |___
8 * \___|\___/|_| \_\_____|
9 *
10 * Copyright (C) 1998 - 2020, Daniel Stenberg, <daniel@haxx.se>, 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 ***************************************************************************/
24
25#ifndef CURL_DISABLE_CRYPTO_AUTH
26
27#define HMAC_MD5_LENGTH 16
28
29typedef void (* HMAC_hinit_func)(void *context);
30typedef void (* HMAC_hupdate_func)(void *context,
31 const unsigned char *data,
32 unsigned int len);
33typedef void (* HMAC_hfinal_func)(unsigned char *result, void *context);
34
35
36/* Per-hash function HMAC parameters. */
37struct HMAC_params {
38 HMAC_hinit_func
39 hmac_hinit; /* Initialize context procedure. */
40 HMAC_hupdate_func hmac_hupdate; /* Update context with data. */
41 HMAC_hfinal_func hmac_hfinal; /* Get final result procedure. */
42 unsigned int hmac_ctxtsize; /* Context structure size. */
43 unsigned int hmac_maxkeylen; /* Maximum key length (bytes). */
44 unsigned int hmac_resultlen; /* Result length (bytes). */
45};
46
47
48/* HMAC computation context. */
49struct HMAC_context {
50 const struct HMAC_params *hmac_hash; /* Hash function definition. */
51 void *hmac_hashctxt1; /* Hash function context 1. */
52 void *hmac_hashctxt2; /* Hash function context 2. */
53};
54
55
56/* Prototypes. */
57struct HMAC_context *Curl_HMAC_init(const struct HMAC_params *hashparams,
58 const unsigned char *key,
59 unsigned int keylen);
60int Curl_HMAC_update(struct HMAC_context *context,
61 const unsigned char *data,
62 unsigned int len);
63int Curl_HMAC_final(struct HMAC_context *context, unsigned char *result);
64
65CURLcode Curl_hmacit(const struct HMAC_params *hashparams,
66 const unsigned char *key, const size_t keylen,
67 const unsigned char *data, const size_t datalen,
68 unsigned char *output);
69
70#endif
71
72#endif /* HEADER_CURL_HMAC_H */
73