diff options
Diffstat (limited to 'lib/hmac.c')
| -rw-r--r-- | lib/hmac.c | 133 |
1 files changed, 0 insertions, 133 deletions
diff --git a/lib/hmac.c b/lib/hmac.c deleted file mode 100644 index 692d27940..000000000 --- a/lib/hmac.c +++ /dev/null @@ -1,133 +0,0 @@ -/*************************************************************************** - * _ _ ____ _ - * Project ___| | | | _ \| | - * / __| | | | |_) | | - * | (__| |_| | _ <| |___ - * \___|\___/|_| \_\_____| - * - * Copyright (C) 1998 - 2011, Daniel Stenberg, <daniel@haxx.se>, et al. - * - * This software is licensed as described in the file COPYING, which - * you should have received as part of this distribution. The terms - * are also available at http://curl.haxx.se/docs/copyright.html. - * - * You may opt to use, copy, modify, merge, publish, distribute and/or sell - * copies of the Software, and permit persons to whom the Software is - * furnished to do so, under the terms of the COPYING file. - * - * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY - * KIND, either express or implied. - * - * RFC2104 Keyed-Hashing for Message Authentication - * - ***************************************************************************/ - -#include "curl_setup.h" - -#ifndef CURL_DISABLE_CRYPTO_AUTH - -#include "curl_hmac.h" - -#define _MPRINTF_REPLACE /* use our functions only */ -#include <curl/mprintf.h> - -#include "curl_memory.h" -/* The last #include file should be: */ -#include "curl_memdebug.h" - -/* - * Generic HMAC algorithm. - * - * This module computes HMAC digests based on any hash function. Parameters - * and computing procedures are set-up dynamically at HMAC computation - * context initialisation. - */ - -static const unsigned char hmac_ipad = 0x36; -static const unsigned char hmac_opad = 0x5C; - - - -HMAC_context * -Curl_HMAC_init(const HMAC_params * hashparams, - const unsigned char * key, - unsigned int keylen) -{ - size_t i; - HMAC_context * ctxt; - unsigned char * hkey; - unsigned char b; - - /* Create HMAC context. */ - i = sizeof *ctxt + 2 * hashparams->hmac_ctxtsize + - hashparams->hmac_resultlen; - ctxt = malloc(i); - - if(!ctxt) - return ctxt; - - ctxt->hmac_hash = hashparams; - ctxt->hmac_hashctxt1 = (void *) (ctxt + 1); - ctxt->hmac_hashctxt2 = (void *) ((char *) ctxt->hmac_hashctxt1 + - hashparams->hmac_ctxtsize); - - /* If the key is too long, replace it by its hash digest. */ - if(keylen > hashparams->hmac_maxkeylen) { - (*hashparams->hmac_hinit)(ctxt->hmac_hashctxt1); - (*hashparams->hmac_hupdate)(ctxt->hmac_hashctxt1, key, keylen); - hkey = (unsigned char *) ctxt->hmac_hashctxt2 + hashparams->hmac_ctxtsize; - (*hashparams->hmac_hfinal)(hkey, ctxt->hmac_hashctxt1); - key = hkey; - keylen = hashparams->hmac_resultlen; - } - - /* Prime the two hash contexts with the modified key. */ - (*hashparams->hmac_hinit)(ctxt->hmac_hashctxt1); - (*hashparams->hmac_hinit)(ctxt->hmac_hashctxt2); - - for(i = 0; i < keylen; i++) { - b = (unsigned char)(*key ^ hmac_ipad); - (*hashparams->hmac_hupdate)(ctxt->hmac_hashctxt1, &b, 1); - b = (unsigned char)(*key++ ^ hmac_opad); - (*hashparams->hmac_hupdate)(ctxt->hmac_hashctxt2, &b, 1); - } - - for(; i < hashparams->hmac_maxkeylen; i++) { - (*hashparams->hmac_hupdate)(ctxt->hmac_hashctxt1, &hmac_ipad, 1); - (*hashparams->hmac_hupdate)(ctxt->hmac_hashctxt2, &hmac_opad, 1); - } - - /* Done, return pointer to HMAC context. */ - return ctxt; -} - -int Curl_HMAC_update(HMAC_context * ctxt, - const unsigned char * data, - unsigned int len) -{ - /* Update first hash calculation. */ - (*ctxt->hmac_hash->hmac_hupdate)(ctxt->hmac_hashctxt1, data, len); - return 0; -} - - -int Curl_HMAC_final(HMAC_context * ctxt, unsigned char * result) -{ - const HMAC_params * hashparams = ctxt->hmac_hash; - - /* Do not get result if called with a null parameter: only release - storage. */ - - if(!result) - result = (unsigned char *) ctxt->hmac_hashctxt2 + - ctxt->hmac_hash->hmac_ctxtsize; - - (*hashparams->hmac_hfinal)(result, ctxt->hmac_hashctxt1); - (*hashparams->hmac_hupdate)(ctxt->hmac_hashctxt2, - result, hashparams->hmac_resultlen); - (*hashparams->hmac_hfinal)(result, ctxt->hmac_hashctxt2); - free((char *) ctxt); - return 0; -} - -#endif /* CURL_DISABLE_CRYPTO_AUTH */ |