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 
27 typedef void    (* HMAC_hinit_func)(void * context);
28 typedef void    (* HMAC_hupdate_func)(void * context,
29                                       const unsigned char * data,
30                                       unsigned int len);
31 typedef void    (* HMAC_hfinal_func)(unsigned char * result, void * context);
32 
33 
34 /* Per-hash function HMAC parameters. */
35 
36 typedef 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 
48 typedef 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 
57 HMAC_context * Curl_HMAC_init(const HMAC_params * hashparams,
58                               const unsigned char * key,
59                               unsigned int keylen);
60 int Curl_HMAC_update(HMAC_context * context,
61                      const unsigned char * data,
62                      unsigned int len);
63 int Curl_HMAC_final(HMAC_context * context, unsigned char * result);
64 
65 #endif
66 
67 #endif /* HEADER_CURL_HMAC_H */
68