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 struct 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. */ 49 struct 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. */ 57 struct HMAC_context *Curl_HMAC_init(const struct HMAC_params *hashparams, 58 const unsigned char *key, 59 unsigned int keylen); 60 int Curl_HMAC_update(struct HMAC_context *context, 61 const unsigned char *data, 62 unsigned int len); 63 int Curl_HMAC_final(struct HMAC_context *context, unsigned char *result); 64 65 CURLcode 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