688 lines
16 KiB
C
688 lines
16 KiB
C
/**
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* @file hmac.c
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* @version $Format:%h%d$
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*
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* HMAC implementation.
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*/
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/*
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* Copyright (c) 2013-2017 Rambus Inc.
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* Copyright (c) PeerSec Networks, 2002-2011
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* All Rights Reserved
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*
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* The latest version of this code is available at http://www.matrixssl.org
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*
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* This software is open source; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This General Public License does NOT permit incorporating this software
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* into proprietary programs. If you are unable to comply with the GPL, a
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* commercial license for this software may be purchased from Rambus at
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* http://www.rambus.com/
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*
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* This program is distributed in WITHOUT ANY WARRANTY; without even the
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* implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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* See the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; 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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* http://www.gnu.org/copyleft/gpl.html
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*/
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/******************************************************************************/
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#include "../cryptoImpl.h"
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int32_t psHmac(psCipherType_e type, const unsigned char *key, psSize_t keyLen,
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const unsigned char *buf, uint32_t len,
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unsigned char hash[MAX_HASHLEN])
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{
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unsigned char hmacKey[MAX_HASH_SIZE] = {0};
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psSize_t hmacKeyLen;
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switch (type)
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{
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#ifdef USE_HMAC_MD5
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case HMAC_MD5:
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return psHmacMd5(key, keyLen, buf, len, hash, hmacKey, &hmacKeyLen);
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#endif
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#ifdef USE_HMAC_SHA1
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case HMAC_SHA1:
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return psHmacSha1(key, keyLen, buf, len, hash, hmacKey, &hmacKeyLen);
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#endif
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#ifdef USE_HMAC_SHA256
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case HMAC_SHA256:
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return psHmacSha256(key, keyLen, buf, len, hash, hmacKey, &hmacKeyLen);
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#endif
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#ifdef USE_HMAC_SHA384
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case HMAC_SHA384:
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return psHmacSha384(key, keyLen, buf, len, hash, hmacKey, &hmacKeyLen);
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#endif
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default:
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return PS_ARG_FAIL;
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}
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/* Redundant return */
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return PS_ARG_FAIL;
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}
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int32_t psHmacInit(psHmac_t *ctx, psCipherType_e type,
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const unsigned char *key, psSize_t keyLen)
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{
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ctx->type = (uint8_t) type;
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switch (type)
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{
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#ifdef USE_HMAC_MD5
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case HMAC_MD5:
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return psHmacMd5Init(&ctx->u.md5, key, keyLen);
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#endif
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#ifdef USE_HMAC_SHA1
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case HMAC_SHA1:
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return psHmacSha1Init(&ctx->u.sha1, key, keyLen);
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#endif
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#ifdef USE_HMAC_SHA256
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case HMAC_SHA256:
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return psHmacSha256Init(&ctx->u.sha256, key, keyLen);
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#endif
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#ifdef USE_HMAC_SHA384
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case HMAC_SHA384:
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return psHmacSha384Init(&ctx->u.sha384, key, keyLen);
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#endif
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default:
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/* Unsupported algorithm. */
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break;
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}
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return PS_ARG_FAIL;
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}
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void psHmacUpdate(psHmac_t *ctx, const unsigned char *buf, uint32_t len)
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{
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switch ((psCipherType_e) ctx->type)
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{
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#ifdef USE_HMAC_MD5
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case HMAC_MD5:
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psHmacMd5Update(&ctx->u.md5, buf, len);
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break;
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#endif
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#ifdef USE_HMAC_SHA1
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case HMAC_SHA1:
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psHmacSha1Update(&ctx->u.sha1, buf, len);
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break;
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#endif
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#ifdef USE_HMAC_SHA256
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case HMAC_SHA256:
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psHmacSha256Update(&ctx->u.sha256, buf, len);
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break;
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#endif
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#ifdef USE_HMAC_SHA384
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case HMAC_SHA384:
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psHmacSha384Update(&ctx->u.sha384, buf, len);
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break;
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#endif
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default:
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break;
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}
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}
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int32_t psHmacSingle(psHmac_t *ctx,
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psCipherType_e hmacAlg,
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const unsigned char *key,
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psSize_t keyLen,
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const unsigned char *in,
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psSizeL_t inLen,
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unsigned char out[MAX_HASHLEN])
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{
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int32_t rc;
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rc = psHmacInit(ctx, hmacAlg, key, keyLen);
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if (rc < 0)
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{
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return rc;
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}
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psHmacUpdate(ctx, in, inLen);
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psHmacFinal(ctx, out);
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return PS_SUCCESS;
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}
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void psHmacFinal(psHmac_t *ctx, unsigned char hash[MAX_HASHLEN])
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{
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switch ((psCipherType_e) ctx->type)
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{
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#ifdef USE_HMAC_MD5
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case HMAC_MD5:
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psHmacMd5Final(&ctx->u.md5, hash);
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break;
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#endif
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#ifdef USE_HMAC_SHA1
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case HMAC_SHA1:
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psHmacSha1Final(&ctx->u.sha1, hash);
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break;
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#endif
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#ifdef USE_HMAC_SHA256
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case HMAC_SHA256:
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psHmacSha256Final(&ctx->u.sha256, hash);
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break;
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#endif
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#ifdef USE_HMAC_SHA384
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case HMAC_SHA384:
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psHmacSha384Final(&ctx->u.sha384, hash);
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break;
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#endif
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default:
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break;
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}
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ctx->type = 0;
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}
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#ifdef USE_MATRIX_HMAC_MD5
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/******************************************************************************/
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/*
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HMAC-MD5
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http://www.faqs.org/rfcs/rfc2104.html
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the HMAC_MD5 transform looks like:
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MD5(K XOR opad, MD5(K XOR ipad, text))
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where K is an n byte key
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ipad is the byte 0x36 repeated 64 times
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opad is the byte 0x5c repeated 64 times
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and text is the data being protected
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If the keyLen is > 64 bytes, we hash the key and use it instead
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*/
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# if !defined(USE_MATRIX_MD5) && !defined(USE_CL_DIGESTS)
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# error USE_MATRIX_MD5 or USE_CL_DIGESTS required
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# endif
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int32_t psHmacMd5(const unsigned char *key, psSize_t keyLen,
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const unsigned char *buf, uint32_t len,
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unsigned char hash[MD5_HASHLEN],
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unsigned char *hmacKey, psSize_t *hmacKeyLen)
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{
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int32_t rc;
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union
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{
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psHmacMd5_t mac;
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psMd5_t md;
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} u;
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psHmacMd5_t *mac = &u.mac;
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psMd5_t *md = &u.md;
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/*
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Support for keys larger than 64 bytes. In this case, we take the
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hash of the key itself and use that instead. Inform the caller by
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updating the hmacKey and hmacKeyLen outputs
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*/
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if (keyLen > 64)
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{
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if ((rc = psMd5Init(md)) < 0)
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{
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return rc;
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}
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psMd5Update(md, key, keyLen);
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psMd5Final(md, hash);
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*hmacKeyLen = MD5_HASHLEN;
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Memcpy(hmacKey, hash, *hmacKeyLen);
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}
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else
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{
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hmacKey = (unsigned char *) key; /* @note typecasting from const */
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*hmacKeyLen = keyLen;
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}
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if ((rc = psHmacMd5Init(mac, hmacKey, *hmacKeyLen)) < 0)
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{
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return rc;
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}
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psHmacMd5Update(mac, buf, len);
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psHmacMd5Final(mac, hash);
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return PS_SUCCESS;
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}
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int32_t psHmacMd5Init(psHmacMd5_t *ctx,
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const unsigned char *key, psSize_t keyLen)
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{
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int32_t rc, i;
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# ifdef CRYPTO_ASSERT
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psAssert(keyLen <= 64);
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# endif
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for (i = 0; (uint32) i < keyLen; i++)
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{
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ctx->pad[i] = key[i] ^ 0x36;
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}
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for (i = keyLen; i < 64; i++)
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{
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ctx->pad[i] = 0x36;
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}
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if ((rc = psMd5Init(&ctx->md5)) < 0)
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{
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return rc;
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}
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psMd5Update(&ctx->md5, ctx->pad, 64);
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for (i = 0; (uint32) i < keyLen; i++)
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{
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ctx->pad[i] = key[i] ^ 0x5c;
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}
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for (i = keyLen; i < 64; i++)
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{
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ctx->pad[i] = 0x5c;
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}
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return PS_SUCCESS;
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}
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void psHmacMd5Update(psHmacMd5_t *ctx,
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const unsigned char *buf, uint32_t len)
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{
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# ifdef CRYPTO_ASSERT
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psAssert(ctx != NULL && buf != NULL);
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# endif
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psMd5Update(&ctx->md5, buf, len);
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}
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void psHmacMd5Final(psHmacMd5_t *ctx, unsigned char hash[MD5_HASHLEN])
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{
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int32_t rc;
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# ifdef CRYPTO_ASSERT
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psAssert(ctx != NULL);
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if (hash == NULL)
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{
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psTraceCrypto("NULL hash storage passed to psHmacMd5Final\n");
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return;
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}
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# endif
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psMd5Final(&ctx->md5, hash);
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/* This Init should succeed, even if it allocates memory since an
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psMd5_t was just Finalized the line above */
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if ((rc = psMd5Init(&ctx->md5)) < 0)
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{
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psAssert(rc >= 0);
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return;
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}
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psMd5Update(&ctx->md5, ctx->pad, 64);
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psMd5Update(&ctx->md5, hash, MD5_HASHLEN);
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psMd5Final(&ctx->md5, hash);
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Memset(ctx->pad, 0x0, sizeof(ctx->pad));
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}
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#endif /* USE_MATRIX_HMAC_MD5 */
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#ifdef USE_MATRIX_HMAC_SHA1
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/******************************************************************************/
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/*
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HMAC-SHA1
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@see http://www.faqs.org/rfcs/rfc2104.html
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*/
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# ifndef USE_SHA1
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# error USE_SHA1 required
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# endif
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int32_t psHmacSha1(const unsigned char *key, psSize_t keyLen,
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const unsigned char *buf, uint32_t len,
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unsigned char hash[SHA1_HASHLEN],
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unsigned char *hmacKey, psSize_t *hmacKeyLen)
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{
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int32_t rc;
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union
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{
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psHmacSha1_t mac;
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psSha1_t md;
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} u;
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psHmacSha1_t *mac = &u.mac;
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psSha1_t *md = &u.md;
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/*
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Support for keys larger than 64 bytes. In this case, we take the
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hash of the key itself and use that instead. Inform the caller by
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updating the hmacKey and hmacKeyLen outputs
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*/
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if (keyLen > 64)
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{
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if ((rc = psSha1Init(md)) < 0)
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{
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return rc;
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}
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psSha1Update(md, key, keyLen);
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psSha1Final(md, hash);
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*hmacKeyLen = SHA1_HASHLEN;
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Memcpy(hmacKey, hash, *hmacKeyLen);
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}
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else
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{
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hmacKey = (unsigned char *) key; /* @note typecasting from const */
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*hmacKeyLen = keyLen;
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}
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if ((rc = psHmacSha1Init(mac, hmacKey, *hmacKeyLen)) < 0)
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{
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return rc;
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}
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psHmacSha1Update(mac, buf, len);
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psHmacSha1Final(mac, hash);
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return PS_SUCCESS;
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}
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int32_t psHmacSha1Init(psHmacSha1_t *ctx,
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const unsigned char *key, psSize_t keyLen)
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{
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int32_t rc, i;
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# ifdef CRYPTO_ASSERT
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psAssert(keyLen <= 64);
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# endif
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for (i = 0; (uint32) i < keyLen; i++)
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{
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ctx->pad[i] = key[i] ^ 0x36;
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}
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for (i = keyLen; (uint32) i < 64; i++)
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{
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ctx->pad[i] = 0x36;
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}
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if ((rc = psSha1Init(&ctx->sha1)) < 0)
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{
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return rc;
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}
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psSha1Update(&ctx->sha1, ctx->pad, 64);
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for (i = 0; (uint32) i < keyLen; i++)
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{
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ctx->pad[i] = key[i] ^ 0x5c;
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}
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for (i = keyLen; i < 64; i++)
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{
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ctx->pad[i] = 0x5c;
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}
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return PS_SUCCESS;
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}
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void psHmacSha1Update(psHmacSha1_t *ctx,
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const unsigned char *buf, uint32_t len)
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{
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# ifdef CRYPTO_ASSERT
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psAssert(ctx != NULL && buf != NULL);
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# endif
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psSha1Update(&ctx->sha1, buf, len);
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}
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void psHmacSha1Final(psHmacSha1_t *ctx, unsigned char hash[SHA1_HASHLEN])
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{
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int32_t rc;
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# ifdef CRYPTO_ASSERT
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psAssert(ctx != NULL);
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if (hash == NULL)
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{
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psTraceCrypto("NULL hash storage passed to psHmacSha1Final\n");
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return;
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}
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# endif
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psSha1Final(&ctx->sha1, hash);
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if ((rc = psSha1Init(&ctx->sha1)) < 0)
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{
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psAssert(rc >= 0);
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return;
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}
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psSha1Update(&ctx->sha1, ctx->pad, 64);
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psSha1Update(&ctx->sha1, hash, SHA1_HASHLEN);
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psSha1Final(&ctx->sha1, hash);
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Memset(ctx->pad, 0x0, sizeof(ctx->pad));
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}
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#endif /* USE_MATRIX_HMAC_SHA1 */
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#ifdef USE_MATRIX_HMAC_SHA256
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/******************************************************************************/
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/*
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HMAC-SHA256
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*/
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int32_t psHmacSha256(const unsigned char *key, psSize_t keyLen,
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const unsigned char *buf, uint32_t len,
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unsigned char hash[SHA256_HASHLEN], unsigned char *hmacKey,
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psSize_t *hmacKeyLen)
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{
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int32 rc, padLen;
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union
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{
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psHmacSha256_t mac;
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psSha256_t md;
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} u;
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psHmacSha256_t *mac = &u.mac;
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psSha256_t *md = &u.md;
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padLen = 64;
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/*
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Support for keys larger than hash block size. In this case, we take the
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hash of the key itself and use that instead. Inform the caller by
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updating the hmacKey and hmacKeyLen outputs
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*/
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if (keyLen > (uint32) padLen)
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{
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if ((rc = psSha256Init(md)) < 0)
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{
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return rc;
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}
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psSha256Update(md, key, keyLen);
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psSha256Final(md, hash);
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Memcpy(hmacKey, hash, SHA256_HASHLEN);
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*hmacKeyLen = SHA256_HASHLEN;
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}
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else
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{
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hmacKey = (unsigned char *) key; /* @note typecasting from const */
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*hmacKeyLen = keyLen;
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}
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if ((rc = psHmacSha256Init(mac, hmacKey, *hmacKeyLen)) < 0)
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{
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return rc;
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}
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psHmacSha256Update(mac, buf, len);
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psHmacSha256Final(mac, hash);
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return PS_SUCCESS;
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}
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int32_t psHmacSha256Init(psHmacSha256_t *ctx,
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const unsigned char *key, psSize_t keyLen)
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{
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int32_t rc, i, padLen = 64;
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# ifdef CRYPTO_ASSERT
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psAssert(keyLen <= (uint32) padLen);
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# endif
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for (i = 0; (uint32) i < keyLen; i++)
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{
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ctx->pad[i] = key[i] ^ 0x36;
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}
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for (i = keyLen; i < padLen; i++)
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{
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ctx->pad[i] = 0x36;
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}
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if ((rc = psSha256Init(&ctx->sha256)) < 0)
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{
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return rc;
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}
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psSha256Update(&ctx->sha256, ctx->pad, padLen);
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for (i = 0; (uint32) i < keyLen; i++)
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{
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ctx->pad[i] = key[i] ^ 0x5c;
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}
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for (i = keyLen; i < padLen; i++)
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{
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ctx->pad[i] = 0x5c;
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}
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return PS_SUCCESS;
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}
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void psHmacSha256Update(psHmacSha256_t *ctx,
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const unsigned char *buf, uint32_t len)
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{
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# ifdef CRYPTO_ASSERT
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psAssert(ctx != NULL && buf != NULL);
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# endif
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psSha256Update(&ctx->sha256, buf, len);
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|
}
|
|
|
|
void psHmacSha256Final(psHmacSha256_t *ctx,
|
|
unsigned char hash[SHA256_HASHLEN])
|
|
{
|
|
int32_t rc;
|
|
|
|
# ifdef CRYPTO_ASSERT
|
|
psAssert(ctx != NULL);
|
|
if (hash == NULL)
|
|
{
|
|
psTraceCrypto("NULL hash storage passed to psHmacSha256Final\n");
|
|
return;
|
|
}
|
|
# endif
|
|
|
|
psSha256Final(&ctx->sha256, hash);
|
|
|
|
if ((rc = psSha256Init(&ctx->sha256)) < 0)
|
|
{
|
|
psAssert(rc >= 0);
|
|
return;
|
|
}
|
|
psSha256Update(&ctx->sha256, ctx->pad, 64);
|
|
psSha256Update(&ctx->sha256, hash, SHA256_HASHLEN);
|
|
psSha256Final(&ctx->sha256, hash);
|
|
Memset(ctx->pad, 0x0, sizeof(ctx->pad));
|
|
}
|
|
#endif /* USE_MATRIX_HMAC_SHA256 */
|
|
|
|
#ifdef USE_MATRIX_HMAC_SHA384
|
|
/******************************************************************************/
|
|
/*
|
|
HMAC-SHA384
|
|
*/
|
|
int32_t psHmacSha384(const unsigned char *key, psSize_t keyLen,
|
|
const unsigned char *buf, uint32_t len,
|
|
unsigned char hash[SHA384_HASHLEN],
|
|
unsigned char *hmacKey, psSize_t *hmacKeyLen)
|
|
{
|
|
int32 rc, padLen;
|
|
|
|
union
|
|
{
|
|
psHmacSha384_t mac;
|
|
psSha384_t md;
|
|
} u;
|
|
psHmacSha384_t *mac = &u.mac;
|
|
psSha384_t *md = &u.md;
|
|
|
|
padLen = 128;
|
|
|
|
/*
|
|
Support for keys larger than hash block size. In this case, we take the
|
|
hash of the key itself and use that instead. Inform the caller by
|
|
updating the hmacKey and hmacKeyLen outputs
|
|
*/
|
|
if (keyLen > (uint32) padLen)
|
|
{
|
|
if ((rc = psSha384Init(md)) < 0)
|
|
{
|
|
return rc;
|
|
}
|
|
psSha384Update(md, key, keyLen);
|
|
psSha384Final(md, hash);
|
|
Memcpy(hmacKey, hash, SHA384_HASHLEN);
|
|
*hmacKeyLen = SHA384_HASHLEN;
|
|
}
|
|
else
|
|
{
|
|
hmacKey = (unsigned char *) key; /* @note typecasting from const */
|
|
*hmacKeyLen = keyLen;
|
|
}
|
|
|
|
if ((rc = psHmacSha384Init(mac, hmacKey, *hmacKeyLen)) < 0)
|
|
{
|
|
return rc;
|
|
}
|
|
psHmacSha384Update(mac, buf, len);
|
|
psHmacSha384Final(mac, hash);
|
|
return PS_SUCCESS;
|
|
}
|
|
|
|
int32_t psHmacSha384Init(psHmacSha384_t *ctx,
|
|
const unsigned char *key, psSize_t keyLen)
|
|
{
|
|
int32_t rc, i, padLen;
|
|
|
|
padLen = 128;
|
|
|
|
# ifdef CRYPTO_ASSERT
|
|
psAssert(keyLen <= (uint32) padLen);
|
|
# endif
|
|
for (i = 0; (uint32) i < keyLen; i++)
|
|
{
|
|
ctx->pad[i] = key[i] ^ 0x36;
|
|
}
|
|
for (i = keyLen; i < padLen; i++)
|
|
{
|
|
ctx->pad[i] = 0x36;
|
|
}
|
|
if ((rc = psSha384Init(&ctx->sha384)) < 0)
|
|
{
|
|
return rc;
|
|
}
|
|
psSha384Update(&ctx->sha384, ctx->pad, padLen);
|
|
|
|
for (i = 0; (uint32) i < keyLen; i++)
|
|
{
|
|
ctx->pad[i] = key[i] ^ 0x5c;
|
|
}
|
|
for (i = keyLen; i < padLen; i++)
|
|
{
|
|
ctx->pad[i] = 0x5c;
|
|
}
|
|
return PS_SUCCESS;
|
|
}
|
|
|
|
void psHmacSha384Update(psHmacSha384_t *ctx,
|
|
const unsigned char *buf, uint32_t len)
|
|
{
|
|
# ifdef CRYPTO_ASSERT
|
|
psAssert(ctx != NULL && buf != NULL);
|
|
# endif
|
|
psSha384Update(&ctx->sha384, buf, len);
|
|
}
|
|
|
|
void psHmacSha384Final(psHmacSha384_t *ctx,
|
|
unsigned char hash[SHA384_HASHLEN])
|
|
{
|
|
int32_t rc;
|
|
|
|
# ifdef CRYPTO_ASSERT
|
|
psAssert(ctx != NULL);
|
|
if (hash == NULL)
|
|
{
|
|
psTraceCrypto("NULL hash storage passed to psHmacSha256Final\n");
|
|
return;
|
|
}
|
|
# endif
|
|
|
|
psSha384Final(&ctx->sha384, hash);
|
|
|
|
if ((rc = psSha384Init(&ctx->sha384)) < 0)
|
|
{
|
|
psAssert(rc >= 0);
|
|
return;
|
|
}
|
|
psSha384Update(&ctx->sha384, ctx->pad, 128);
|
|
psSha384Update(&ctx->sha384, hash, SHA384_HASHLEN);
|
|
psSha384Final(&ctx->sha384, hash);
|
|
|
|
Memset(ctx->pad, 0x0, sizeof(ctx->pad));
|
|
}
|
|
#endif /* USE_MATRIX_HMAC_SHA384 */
|
|
|
|
/******************************************************************************/
|
|
|