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/* pwdbased.c
*
* Copyright (C) 2006-2011 Sawtooth Consulting Ltd.
*
* This file is part of CyaSSL.
*
* CyaSSL is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* CyaSSL is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
#ifndef NO_PWDBASED
#include "pwdbased.h"
int PBKDF1(byte* output, const byte* passwd, int pLen, const byte* salt,
int sLen, int iterations, int kLen, int hashType)
{
Md5 md5;
Sha sha;
int hLen = (hashType == MD5) ? MD5_DIGEST_SIZE : SHA_DIGEST_SIZE;
int i;
byte buffer[SHA_DIGEST_SIZE]; /* max size */
if (hashType != MD5 && hashType != SHA)
return -1;
if (kLen > hLen)
return -1;
if (iterations < 1)
return -1;
if (hashType == MD5) {
InitMd5(&md5);
Md5Update(&md5, passwd, pLen);
Md5Update(&md5, salt, sLen);
Md5Final(&md5, buffer);
}
else {
InitSha(&sha);
ShaUpdate(&sha, passwd, pLen);
ShaUpdate(&sha, salt, sLen);
ShaFinal(&sha, buffer);
}
for (i = 1; i < iterations; i++) {
if (hashType == MD5) {
Md5Update(&md5, buffer, hLen);
Md5Final(&md5, buffer);
}
else {
ShaUpdate(&sha, buffer, hLen);
ShaFinal(&sha, buffer);
}
}
XMEMCPY(output, buffer, kLen);
return 0;
}
#endif /* NO_PWDBASED */
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