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/** BEGIN COPYRIGHT BLOCK
* 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., 59 Temple
* Place, Suite 330, Boston, MA 02111-1307 USA.
*
* In addition, as a special exception, Red Hat, Inc. gives You the additional
* right to link the code of this Program with code not covered under the GNU
* General Public License ("Non-GPL Code") and to distribute linked combinations
* including the two, subject to the limitations in this paragraph. Non-GPL Code
* permitted under this exception must only link to the code of this Program
* through those well defined interfaces identified in the file named EXCEPTION
* found in the source code files (the "Approved Interfaces"). The files of
* Non-GPL Code may instantiate templates or use macros or inline functions from
* the Approved Interfaces without causing the resulting work to be covered by
* the GNU General Public License. Only Red Hat, Inc. may make changes or
* additions to the list of Approved Interfaces. You must obey the GNU General
* Public License in all respects for all of the Program code and other code used
* in conjunction with the Program except the Non-GPL Code covered by this
* exception. If you modify this file, you may extend this exception to your
* version of the file, but you are not obligated to do so. If you do not wish to
* provide this exception without modification, you must delete this exception
* statement from your version and license this file solely under the GPL without
* exception.
*
*
* Copyright (C) 2001 Sun Microsystems, Inc. Used by permission.
* Copyright (C) 2005 Red Hat, Inc.
* All rights reserved.
* END COPYRIGHT BLOCK **/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
/*
* slapd hashed password routines
*
*/
#include <stdio.h>
#include <string.h>
#include <sys/types.h>
#include "pwdstorage.h"
#include "prtime.h"
#include "prlong.h"
#include <pk11func.h>
#include <pk11pqg.h>
#define SHA_SALT_LENGTH 8 /* number of bytes of data in salt */
static void ssha_rand_array(void *randx, size_t len);
/* ***************************************************
Identical function to slapi_rand_array in util.c, but can't use
that here since this module is included in libds_admin, which doesn't
link to libslapd.
*************************************************** */
static void
ssha_rand_array(void *randx, size_t len)
{
PK11_RandomUpdate(randx, len);
PK11_GenerateRandom((unsigned char *)randx, (int)len);
}
SECStatus
sha_salted_hash(unsigned char *hash_out, char *pwd, struct berval *salt, unsigned int secOID)
{
PK11Context *ctx;
unsigned int outLen;
unsigned int shaLen;
SECStatus rc;
switch (secOID) {
case SEC_OID_SHA1:
shaLen = SHA1_LENGTH;
break;
case SEC_OID_SHA256:
shaLen = SHA256_LENGTH;
break;
case SEC_OID_SHA384:
shaLen = SHA384_LENGTH;
break;
case SEC_OID_SHA512:
shaLen = SHA512_LENGTH;
break;
default:
/* An unknown secOID was passed in. We shouldn't get here. */
rc = SECFailure;
return rc;
}
if (salt && salt->bv_len) {
ctx = PK11_CreateDigestContext(secOID);
if (ctx == NULL) {
rc = SECFailure;
} else {
PK11_DigestBegin(ctx);
PK11_DigestOp(ctx, (unsigned char*)pwd, strlen(pwd));
PK11_DigestOp(ctx, (unsigned char*)(salt->bv_val), salt->bv_len);
PK11_DigestFinal(ctx, hash_out, &outLen, shaLen);
PK11_DestroyContext(ctx, 1);
if (outLen == shaLen)
rc = SECSuccess;
else
rc = SECFailure;
}
}
else {
/*backward compatibility*/
rc = PK11_HashBuf(secOID, hash_out, (unsigned char *)pwd, strlen(pwd));
}
return rc;
}
char *
salted_sha_pw_enc( char *pwd, unsigned int shaLen )
{
unsigned char hash[ MAX_SHA_HASH_SIZE + SHA_SALT_LENGTH ];
unsigned char *salt = hash + shaLen;
struct berval saltval;
char *enc;
char *schemeName;
unsigned int schemeNameLen;
unsigned int secOID;
/* Determine which algorithm we're using */
switch (shaLen) {
case SHA1_LENGTH:
schemeName = SALTED_SHA1_SCHEME_NAME;
schemeNameLen = SALTED_SHA1_NAME_LEN;
secOID = SEC_OID_SHA1;
break;
case SHA256_LENGTH:
schemeName = SALTED_SHA256_SCHEME_NAME;
schemeNameLen = SALTED_SHA256_NAME_LEN;
secOID = SEC_OID_SHA256;
break;
case SHA384_LENGTH:
schemeName = SALTED_SHA384_SCHEME_NAME;
schemeNameLen = SALTED_SHA384_NAME_LEN;
secOID = SEC_OID_SHA384;
break;
case SHA512_LENGTH:
schemeName = SALTED_SHA512_SCHEME_NAME;
schemeNameLen = SALTED_SHA512_NAME_LEN;
secOID = SEC_OID_SHA512;
break;
default:
/* An unknown shaLen was passed in. We shouldn't get here. */
return( NULL );
}
saltval.bv_val = (void*)salt;
saltval.bv_len = SHA_SALT_LENGTH;
/* generate a new random salt */
/* Note: the uninitialized salt array provides a little extra entropy
* to the random array generation, but it is not really needed since
* PK11_GenerateRandom takes care of seeding. In any case, it doesn't
* hurt. */
ssha_rand_array( salt, SHA_SALT_LENGTH );
/* hash the user's key */
if ( sha_salted_hash( hash, pwd, &saltval, secOID ) != SECSuccess ) {
return( NULL );
}
if (( enc = slapi_ch_malloc( 3 + schemeNameLen +
LDIF_BASE64_LEN(shaLen + SHA_SALT_LENGTH))) == NULL ) {
return( NULL );
}
sprintf( enc, "%c%s%c", PWD_HASH_PREFIX_START, schemeName,
PWD_HASH_PREFIX_END );
(void)ldif_base64_encode( hash, enc + 2 + schemeNameLen,
(shaLen + SHA_SALT_LENGTH), -1 );
return( enc );
}
/*
* Wrapper functions for password encoding
*/
char *
salted_sha1_pw_enc( char *pwd )
{
return salted_sha_pw_enc( pwd, SHA1_LENGTH );
}
char *
salted_sha256_pw_enc( char *pwd )
{
return salted_sha_pw_enc( pwd, SHA256_LENGTH );
}
char *
salted_sha384_pw_enc( char *pwd )
{
return salted_sha_pw_enc( pwd, SHA384_LENGTH );
}
char *
salted_sha512_pw_enc( char *pwd )
{
return salted_sha_pw_enc( pwd, SHA512_LENGTH );
}
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