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/* passwd.c -- Generates a SHA512 hash of a clear-text password
*
* GPLv2 - Copyright (C) 2008 David Sommerseth <dazo@users.sourceforge.net>
*
* This program 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; version 2
* of the License.
*
* This program 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdint.h>
#include "eurephia_nullsafe.h"
#include "sha512.h"
char *_passwdhash(const char *pwd, const char *file, const int line) {
SHA512Context sha;
uint8_t sha_res[SHA512_HASH_SIZE];
char *ret = NULL, *ptr = NULL;
unsigned len = 0, i;
len = strlen_nullsafe(pwd);
if( (pwd == NULL) && (len == 0) ) {
return NULL;
}
// Generate SHA512 hash of password
memset(&sha, 0, sizeof(SHA512Context));
memset(&sha_res, 0, sizeof(sha_res));
SHA512Init(&sha);
SHA512Update(&sha, pwd, len);
SHA512Final(&sha, sha_res);
// Allocate memory for the return buffer
#ifdef MEMWATCH
ret = (char *) mwMalloc((SHA512_HASH_SIZE*2)+3, file, line);
#else
ret = (char *) malloc((SHA512_HASH_SIZE*2)+3);
#endif
memset(ret, 0,(SHA512_HASH_SIZE*2)+3);
ptr = ret;
// Generate a readable string of the hash
for( i = 0; i < SHA512_HASH_SIZE; i++ ) {
sprintf(ptr, "%02x", sha_res[i]);
ptr += 2;
}
// Cleanup - remove hash data from memory
memset(&sha, 0, sizeof(SHA512Context));
memset(&sha_res, 0, sizeof(sha_res));
return ret;
}
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