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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 - 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.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: #define HMAC_MD5_LENGTH 16
   28: 
   29: typedef void    (* HMAC_hinit_func)(void *context);
   30: typedef void    (* HMAC_hupdate_func)(void *context,
   31:                                       const unsigned char *data,
   32:                                       unsigned int len);
   33: typedef void    (* HMAC_hfinal_func)(unsigned char *result, void *context);
   34: 
   35: 
   36: /* Per-hash function HMAC parameters. */
   37: 
   38: typedef struct {
   39:   HMAC_hinit_func       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: } HMAC_params;
   46: 
   47: 
   48: /* HMAC computation context. */
   49: 
   50: typedef struct {
   51:   const HMAC_params *hmac_hash; /* Hash function definition. */
   52:   void *hmac_hashctxt1;         /* Hash function context 1. */
   53:   void *hmac_hashctxt2;         /* Hash function context 2. */
   54: } HMAC_context;
   55: 
   56: 
   57: /* Prototypes. */
   58: 
   59: HMAC_context * Curl_HMAC_init(const HMAC_params *hashparams,
   60:                               const unsigned char *key,
   61:                               unsigned int keylen);
   62: int Curl_HMAC_update(HMAC_context *context,
   63:                      const unsigned char *data,
   64:                      unsigned int len);
   65: int Curl_HMAC_final(HMAC_context *context, unsigned char *result);
   66: 
   67: CURLcode Curl_hmacit(const 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 */