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/** BEGIN COPYRIGHT BLOCK
* Copyright (C) 2001 Sun Microsystems, Inc. Used by permission.
* Copyright (C) 2005 Red Hat, Inc.
* All rights reserved.
*
* License: GPL (version 3 or any later version).
* See LICENSE for details.
* 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 */
SECStatus
sha_salted_hash(char *hash_out, const 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, (unsigned char *)hash_out, &outLen, shaLen);
PK11_DestroyContext(ctx, 1);
if (outLen == shaLen)
rc = SECSuccess;
else
rc = SECFailure;
}
} else {
/*backward compatibility*/
rc = PK11_HashBuf(secOID, (unsigned char *)hash_out, (unsigned char *)pwd, strlen(pwd));
}
return rc;
}
char *
salted_sha_pw_enc(const char *pwd, unsigned int shaLen)
{
char hash[MAX_SHA_HASH_SIZE + SHA_SALT_LENGTH];
char *salt = hash + shaLen;
struct berval saltval;
char *enc;
size_t encsize;
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);
}
memset(hash, 0, sizeof(hash));
saltval.bv_val = (void *)salt;
saltval.bv_len = SHA_SALT_LENGTH;
/* generate a new random salt */
slapi_rand_array(salt, SHA_SALT_LENGTH);
/* hash the user's key */
if (sha_salted_hash(hash, pwd, &saltval, secOID) != SECSuccess) {
return (NULL);
}
encsize = 3 + schemeNameLen +
LDIF_BASE64_LEN(shaLen + SHA_SALT_LENGTH);
if ((enc = slapi_ch_calloc(encsize, sizeof(char))) == NULL) {
return (NULL);
}
sprintf(enc, "%c%s%c", PWD_HASH_PREFIX_START, schemeName,
PWD_HASH_PREFIX_END);
(void)PL_Base64Encode(hash, (shaLen + SHA_SALT_LENGTH), enc + 2 + schemeNameLen);
PR_ASSERT(0 == enc[encsize - 1]); /* must be null terminated */
return (enc);
}
/*
* Wrapper functions for password encoding
*/
char *
salted_sha1_pw_enc(const char *pwd)
{
return salted_sha_pw_enc(pwd, SHA1_LENGTH);
}
char *
salted_sha256_pw_enc(const char *pwd)
{
return salted_sha_pw_enc(pwd, SHA256_LENGTH);
}
char *
salted_sha384_pw_enc(const char *pwd)
{
return salted_sha_pw_enc(pwd, SHA384_LENGTH);
}
char *
salted_sha512_pw_enc(const char *pwd)
{
return salted_sha_pw_enc(pwd, SHA512_LENGTH);
}
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