1#ifndef HEADER_CURL_HMAC_H
2#define HEADER_CURL_HMAC_H
3/***************************************************************************
4 *                                  _   _ ____  _
5 *  Project                     ___| | | |  _ \| |
6 *                             / __| | | | |_) | |
7 *                            | (__| |_| |  _ <| |___
8 *                             \___|\___/|_| \_\_____|
9 *
10 * Copyright (C) 1998 - 2010, 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 http://curl.haxx.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
27typedef void    (* HMAC_hinit_func)(void * context);
28typedef void    (* HMAC_hupdate_func)(void * context,
29                                      const unsigned char * data,
30                                      unsigned int len);
31typedef void    (* HMAC_hfinal_func)(unsigned char * result, void * context);
32
33
34/* Per-hash function HMAC parameters. */
35
36typedef struct {
37  HMAC_hinit_func       hmac_hinit;     /* Initialize context procedure. */
38  HMAC_hupdate_func     hmac_hupdate;   /* Update context with data. */
39  HMAC_hfinal_func      hmac_hfinal;    /* Get final result procedure. */
40  unsigned int          hmac_ctxtsize;  /* Context structure size. */
41  unsigned int          hmac_maxkeylen; /* Maximum key length (bytes). */
42  unsigned int          hmac_resultlen; /* Result length (bytes). */
43} HMAC_params;
44
45
46/* HMAC computation context. */
47
48typedef struct {
49  const HMAC_params *   hmac_hash;      /* Hash function definition. */
50  void *                hmac_hashctxt1; /* Hash function context 1. */
51  void *                hmac_hashctxt2; /* Hash function context 2. */
52} HMAC_context;
53
54
55/* Prototypes. */
56
57HMAC_context * Curl_HMAC_init(const HMAC_params * hashparams,
58                              const unsigned char * key,
59                              unsigned int keylen);
60int Curl_HMAC_update(HMAC_context * context,
61                     const unsigned char * data,
62                     unsigned int len);
63int Curl_HMAC_final(HMAC_context * context, unsigned char * result);
64
65#endif
66
67#endif /* HEADER_CURL_HMAC_H */
68