203 lines
6.4 KiB
C
203 lines
6.4 KiB
C
/* p5_pbev2.c */
|
|
/* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
|
|
* project 1999.
|
|
*/
|
|
/* ====================================================================
|
|
* Copyright (c) 1999 The OpenSSL Project. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
*
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in
|
|
* the documentation and/or other materials provided with the
|
|
* distribution.
|
|
*
|
|
* 3. All advertising materials mentioning features or use of this
|
|
* software must display the following acknowledgment:
|
|
* "This product includes software developed by the OpenSSL Project
|
|
* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
|
|
*
|
|
* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
|
|
* endorse or promote products derived from this software without
|
|
* prior written permission. For written permission, please contact
|
|
* licensing@OpenSSL.org.
|
|
*
|
|
* 5. Products derived from this software may not be called "OpenSSL"
|
|
* nor may "OpenSSL" appear in their names without prior written
|
|
* permission of the OpenSSL Project.
|
|
*
|
|
* 6. Redistributions of any form whatsoever must retain the following
|
|
* acknowledgment:
|
|
* "This product includes software developed by the OpenSSL Project
|
|
* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
|
|
* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
|
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
|
|
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
|
|
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
|
|
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
|
|
* OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
* ====================================================================
|
|
*
|
|
* This product includes cryptographic software written by Eric Young
|
|
* (eay@cryptsoft.com). This product includes software written by Tim
|
|
* Hudson (tjh@cryptsoft.com).
|
|
*
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include "cryptlib.h"
|
|
#include <openssl/asn1t.h>
|
|
#include <openssl/x509.h>
|
|
#include <openssl/rand.h>
|
|
|
|
/* PKCS#5 v2.0 password based encryption structures */
|
|
|
|
ASN1_SEQUENCE(PBE2PARAM) = {
|
|
ASN1_SIMPLE(PBE2PARAM, keyfunc, X509_ALGOR),
|
|
ASN1_SIMPLE(PBE2PARAM, encryption, X509_ALGOR)
|
|
} ASN1_SEQUENCE_END(PBE2PARAM)
|
|
|
|
IMPLEMENT_ASN1_FUNCTIONS(PBE2PARAM)
|
|
|
|
ASN1_SEQUENCE(PBKDF2PARAM) = {
|
|
ASN1_SIMPLE(PBKDF2PARAM, salt, ASN1_ANY),
|
|
ASN1_SIMPLE(PBKDF2PARAM, iter, ASN1_INTEGER),
|
|
ASN1_OPT(PBKDF2PARAM, keylength, ASN1_INTEGER),
|
|
ASN1_OPT(PBKDF2PARAM, prf, X509_ALGOR)
|
|
} ASN1_SEQUENCE_END(PBKDF2PARAM)
|
|
|
|
IMPLEMENT_ASN1_FUNCTIONS(PBKDF2PARAM)
|
|
|
|
/* Return an algorithm identifier for a PKCS#5 v2.0 PBE algorithm:
|
|
* yes I know this is horrible!
|
|
*/
|
|
|
|
X509_ALGOR *PKCS5_pbe2_set(const EVP_CIPHER *cipher, int iter,
|
|
unsigned char *salt, int saltlen)
|
|
{
|
|
X509_ALGOR *scheme = NULL, *kalg = NULL, *ret = NULL;
|
|
int alg_nid;
|
|
EVP_CIPHER_CTX ctx;
|
|
unsigned char iv[EVP_MAX_IV_LENGTH];
|
|
PBKDF2PARAM *kdf = NULL;
|
|
PBE2PARAM *pbe2 = NULL;
|
|
ASN1_OCTET_STRING *osalt = NULL;
|
|
ASN1_OBJECT *obj;
|
|
|
|
alg_nid = EVP_CIPHER_type(cipher);
|
|
if(alg_nid == NID_undef) {
|
|
ASN1err(ASN1_F_PKCS5_PBE2_SET,
|
|
ASN1_R_CIPHER_HAS_NO_OBJECT_IDENTIFIER);
|
|
goto err;
|
|
}
|
|
obj = OBJ_nid2obj(alg_nid);
|
|
|
|
if(!(pbe2 = PBE2PARAM_new())) goto merr;
|
|
|
|
/* Setup the AlgorithmIdentifier for the encryption scheme */
|
|
scheme = pbe2->encryption;
|
|
|
|
scheme->algorithm = obj;
|
|
if(!(scheme->parameter = ASN1_TYPE_new())) goto merr;
|
|
|
|
/* Create random IV */
|
|
if (RAND_pseudo_bytes(iv, EVP_CIPHER_iv_length(cipher)) < 0)
|
|
goto err;
|
|
|
|
EVP_CIPHER_CTX_init(&ctx);
|
|
|
|
/* Dummy cipherinit to just setup the IV */
|
|
EVP_CipherInit_ex(&ctx, cipher, NULL, NULL, iv, 0);
|
|
if(EVP_CIPHER_param_to_asn1(&ctx, scheme->parameter) < 0) {
|
|
ASN1err(ASN1_F_PKCS5_PBE2_SET,
|
|
ASN1_R_ERROR_SETTING_CIPHER_PARAMS);
|
|
goto err;
|
|
}
|
|
EVP_CIPHER_CTX_cleanup(&ctx);
|
|
|
|
if(!(kdf = PBKDF2PARAM_new())) goto merr;
|
|
if(!(osalt = M_ASN1_OCTET_STRING_new())) goto merr;
|
|
|
|
if (!saltlen) saltlen = PKCS5_SALT_LEN;
|
|
if (!(osalt->data = OPENSSL_malloc (saltlen))) goto merr;
|
|
osalt->length = saltlen;
|
|
if (salt) memcpy (osalt->data, salt, saltlen);
|
|
else if (RAND_pseudo_bytes (osalt->data, saltlen) < 0) goto merr;
|
|
|
|
if(iter <= 0) iter = PKCS5_DEFAULT_ITER;
|
|
if(!ASN1_INTEGER_set(kdf->iter, iter)) goto merr;
|
|
|
|
/* Now include salt in kdf structure */
|
|
kdf->salt->value.octet_string = osalt;
|
|
kdf->salt->type = V_ASN1_OCTET_STRING;
|
|
osalt = NULL;
|
|
|
|
/* If its RC2 then we'd better setup the key length */
|
|
|
|
if(alg_nid == NID_rc2_cbc) {
|
|
if(!(kdf->keylength = M_ASN1_INTEGER_new())) goto merr;
|
|
if(!ASN1_INTEGER_set (kdf->keylength,
|
|
EVP_CIPHER_key_length(cipher))) goto merr;
|
|
}
|
|
|
|
/* prf can stay NULL because we are using hmacWithSHA1 */
|
|
|
|
/* Now setup the PBE2PARAM keyfunc structure */
|
|
|
|
pbe2->keyfunc->algorithm = OBJ_nid2obj(NID_id_pbkdf2);
|
|
|
|
/* Encode PBKDF2PARAM into parameter of pbe2 */
|
|
|
|
if(!(pbe2->keyfunc->parameter = ASN1_TYPE_new())) goto merr;
|
|
|
|
if(!ASN1_pack_string(kdf, i2d_PBKDF2PARAM,
|
|
&pbe2->keyfunc->parameter->value.sequence)) goto merr;
|
|
pbe2->keyfunc->parameter->type = V_ASN1_SEQUENCE;
|
|
|
|
PBKDF2PARAM_free(kdf);
|
|
kdf = NULL;
|
|
|
|
/* Now set up top level AlgorithmIdentifier */
|
|
|
|
if(!(ret = X509_ALGOR_new())) goto merr;
|
|
if(!(ret->parameter = ASN1_TYPE_new())) goto merr;
|
|
|
|
ret->algorithm = OBJ_nid2obj(NID_pbes2);
|
|
|
|
/* Encode PBE2PARAM into parameter */
|
|
|
|
if(!ASN1_pack_string(pbe2, i2d_PBE2PARAM,
|
|
&ret->parameter->value.sequence)) goto merr;
|
|
ret->parameter->type = V_ASN1_SEQUENCE;
|
|
|
|
PBE2PARAM_free(pbe2);
|
|
pbe2 = NULL;
|
|
|
|
return ret;
|
|
|
|
merr:
|
|
ASN1err(ASN1_F_PKCS5_PBE2_SET,ERR_R_MALLOC_FAILURE);
|
|
|
|
err:
|
|
PBE2PARAM_free(pbe2);
|
|
/* Note 'scheme' is freed as part of pbe2 */
|
|
M_ASN1_OCTET_STRING_free(osalt);
|
|
PBKDF2PARAM_free(kdf);
|
|
X509_ALGOR_free(kalg);
|
|
X509_ALGOR_free(ret);
|
|
|
|
return NULL;
|
|
|
|
}
|