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      1 #ifndef HEADER_CURL_HMAC_H
      2 #define HEADER_CURL_HMAC_H
      3 /***************************************************************************
      4  *                                  _   _ ____  _
      5  *  Project                     ___| | | |  _ \| |
      6  *                             / __| | | | |_) | |
      7  *                            | (__| |_| |  _ <| |___
      8  *                             \___|\___/|_| \_\_____|
      9  *
     10  * Copyright (C) 1998 - 2016, Daniel Stenberg, <daniel (at) 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.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