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73dfbb7568
git-svn-id: svn://svn.code.sf.net/p/axtls/code/trunk@78 9a5d90b5-6617-0410-8a86-bb477d3ed2e3
89 lines
2.3 KiB
C
89 lines
2.3 KiB
C
/*
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* Copyright(C) 2006 Cameron Rich
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*
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* This library is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation; either version 2.1 of the License, or
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* (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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/**
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* HMAC implementation - This code was originally taken from RFC2104
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*/
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#include <string.h>
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#include "crypto.h"
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/**
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* Perform HMAC-MD5
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*/
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void hmac_md5(const uint8_t *msg, int length, const uint8_t *key,
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int key_len, uint8_t *digest)
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{
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MD5_CTX context;
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uint8_t k_ipad[64];
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uint8_t k_opad[64];
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int i;
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memset(k_ipad, 0, sizeof k_ipad);
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memset(k_opad, 0, sizeof k_opad);
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memcpy(k_ipad, key, key_len);
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memcpy(k_opad, key, key_len);
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for (i = 0; i < 64; i++)
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{
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k_ipad[i] ^= 0x36;
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k_opad[i] ^= 0x5c;
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}
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MD5Init(&context);
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MD5Update(&context, k_ipad, 64);
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MD5Update(&context, msg, length);
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MD5Final(&context, digest);
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MD5Init(&context);
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MD5Update(&context, k_opad, 64);
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MD5Update(&context, digest, MD5_SIZE);
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MD5Final(&context, digest);
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}
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/**
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* Perform HMAC-SHA1
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*/
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void hmac_sha1(const uint8_t *msg, int length, const uint8_t *key,
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int key_len, uint8_t *digest)
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{
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SHA1_CTX context;
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uint8_t k_ipad[64];
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uint8_t k_opad[64];
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int i;
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memset(k_ipad, 0, sizeof k_ipad);
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memset(k_opad, 0, sizeof k_opad);
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memcpy(k_ipad, key, key_len);
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memcpy(k_opad, key, key_len);
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for (i = 0; i < 64; i++)
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{
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k_ipad[i] ^= 0x36;
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k_opad[i] ^= 0x5c;
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}
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SHA1Init(&context);
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SHA1Update(&context, k_ipad, 64);
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SHA1Update(&context, msg, length);
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SHA1Final(&context, digest);
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SHA1Init(&context);
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SHA1Update(&context, k_opad, 64);
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SHA1Update(&context, digest, SHA1_SIZE);
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SHA1Final(&context, digest);
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}
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