crypto/asn1/p5_pbev2.c - third_party/openssl - Git at Google

 /* 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/asn1_mac.h>
 #include <openssl/rand.h>

 /* PKCS#5 v2.0 password based encryption structures */

 int i2d_PBE2PARAM(PBE2PARAM *a, unsigned char **pp)
 {
 	M_ASN1_I2D_vars(a);
 	M_ASN1_I2D_len (a->keyfunc, i2d_X509_ALGOR);
 	M_ASN1_I2D_len (a->encryption, i2d_X509_ALGOR);

 	M_ASN1_I2D_seq_total ();

 	M_ASN1_I2D_put (a->keyfunc, i2d_X509_ALGOR);
 	M_ASN1_I2D_put (a->encryption, i2d_X509_ALGOR);

 	M_ASN1_I2D_finish();
 }

 PBE2PARAM *PBE2PARAM_new(void)
 {
 	PBE2PARAM *ret=NULL;
 	ASN1_CTX c;
 	M_ASN1_New_Malloc(ret, PBE2PARAM);
 	M_ASN1_New(ret->keyfunc,X509_ALGOR_new);
 	M_ASN1_New(ret->encryption,X509_ALGOR_new);
 	return (ret);
 	M_ASN1_New_Error(ASN1_F_PBE2PARAM_NEW);
 }

 PBE2PARAM *d2i_PBE2PARAM(PBE2PARAM **a, unsigned char **pp, long length)
 {
 	M_ASN1_D2I_vars(a,PBE2PARAM *,PBE2PARAM_new);
 	M_ASN1_D2I_Init();
 	M_ASN1_D2I_start_sequence();
 	M_ASN1_D2I_get (ret->keyfunc, d2i_X509_ALGOR);
 	M_ASN1_D2I_get (ret->encryption, d2i_X509_ALGOR);
 	M_ASN1_D2I_Finish(a, PBE2PARAM_free, ASN1_F_D2I_PBE2PARAM);
 }

 void PBE2PARAM_free (PBE2PARAM *a)
 {
 	if(a==NULL) return;
 	X509_ALGOR_free(a->keyfunc);
 	X509_ALGOR_free(a->encryption);
 	Free ((char *)a);
 }

 int i2d_PBKDF2PARAM(PBKDF2PARAM *a, unsigned char **pp)
 {
 	M_ASN1_I2D_vars(a);
 	M_ASN1_I2D_len (a->salt, i2d_ASN1_TYPE);
 	M_ASN1_I2D_len (a->iter, i2d_ASN1_INTEGER);
 	M_ASN1_I2D_len (a->keylength, i2d_ASN1_INTEGER);
 	M_ASN1_I2D_len (a->prf, i2d_X509_ALGOR);

 	M_ASN1_I2D_seq_total ();

 	M_ASN1_I2D_put (a->salt, i2d_ASN1_TYPE);
 	M_ASN1_I2D_put (a->iter, i2d_ASN1_INTEGER);
 	M_ASN1_I2D_put (a->keylength, i2d_ASN1_INTEGER);
 	M_ASN1_I2D_put (a->prf, i2d_X509_ALGOR);

 	M_ASN1_I2D_finish();
 }

 PBKDF2PARAM *PBKDF2PARAM_new(void)
 {
 	PBKDF2PARAM *ret=NULL;
 	ASN1_CTX c;
 	M_ASN1_New_Malloc(ret, PBKDF2PARAM);
 	M_ASN1_New(ret->salt, ASN1_TYPE_new);
 	M_ASN1_New(ret->iter, ASN1_INTEGER_new);
 	ret->keylength = NULL;
 	ret->prf = NULL;
 	return (ret);
 	M_ASN1_New_Error(ASN1_F_PBKDF2PARAM_NEW);
 }

 PBKDF2PARAM *d2i_PBKDF2PARAM(PBKDF2PARAM **a, unsigned char **pp,
 	     long length)
 {
 	M_ASN1_D2I_vars(a,PBKDF2PARAM *,PBKDF2PARAM_new);
 	M_ASN1_D2I_Init();
 	M_ASN1_D2I_start_sequence();
 	M_ASN1_D2I_get (ret->salt, d2i_ASN1_TYPE);
 	M_ASN1_D2I_get (ret->iter, d2i_ASN1_INTEGER);
 	M_ASN1_D2I_get_opt (ret->keylength, d2i_ASN1_INTEGER, V_ASN1_INTEGER);
 	M_ASN1_D2I_get_opt (ret->prf, d2i_X509_ALGOR, V_ASN1_SEQUENCE);
 	M_ASN1_D2I_Finish(a, PBKDF2PARAM_free, ASN1_F_D2I_PBKDF2PARAM);
 }

 void PBKDF2PARAM_free (PBKDF2PARAM *a)
 {
 	if(a==NULL) return;
 	ASN1_TYPE_free(a->salt);
 	ASN1_INTEGER_free(a->iter);
 	ASN1_INTEGER_free(a->keylength);
 	X509_ALGOR_free(a->prf);
 	Free ((char *)a);
 }

 /* 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;

 	if(!(pbe2 = PBE2PARAM_new())) goto merr;

 	/* Setup the AlgorithmIdentifier for the encryption scheme */
 	scheme = pbe2->encryption;

 	alg_nid = EVP_CIPHER_type(cipher);

 	scheme->algorithm = OBJ_nid2obj(alg_nid);
 	if(!(scheme->parameter = ASN1_TYPE_new())) goto merr;

 	/* Create random IV */
 	RAND_bytes(iv, EVP_CIPHER_iv_length(cipher));

 	/* Dummy cipherinit to just setup the IV */
 	EVP_CipherInit(&ctx, cipher, 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 = ASN1_OCTET_STRING_new())) goto merr;

 	if (!saltlen) saltlen = PKCS5_SALT_LEN;
 	if (!(osalt->data = Malloc (saltlen))) goto merr;
 	osalt->length = saltlen;
 	if (salt) memcpy (osalt->data, salt, saltlen);
 	else RAND_bytes (osalt->data, saltlen);

 	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 = 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 */
 	ASN1_OCTET_STRING_free(osalt);
 	PBKDF2PARAM_free(kdf);
 	X509_ALGOR_free(kalg);
 	X509_ALGOR_free(ret);

 	return NULL;

 }
	/* 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/asn1_mac.h>
	#include <openssl/rand.h>

	/* PKCS#5 v2.0 password based encryption structures */

	int i2d_PBE2PARAM(PBE2PARAM a, unsigned char *pp)
	{
	M_ASN1_I2D_vars(a);
	M_ASN1_I2D_len (a->keyfunc, i2d_X509_ALGOR);
	M_ASN1_I2D_len (a->encryption, i2d_X509_ALGOR);

	M_ASN1_I2D_seq_total ();

	M_ASN1_I2D_put (a->keyfunc, i2d_X509_ALGOR);
	M_ASN1_I2D_put (a->encryption, i2d_X509_ALGOR);

	M_ASN1_I2D_finish();
	}

	PBE2PARAM *PBE2PARAM_new(void)
	{
	PBE2PARAM *ret=NULL;
	ASN1_CTX c;
	M_ASN1_New_Malloc(ret, PBE2PARAM);
	M_ASN1_New(ret->keyfunc,X509_ALGOR_new);
	M_ASN1_New(ret->encryption,X509_ALGOR_new);
	return (ret);
	M_ASN1_New_Error(ASN1_F_PBE2PARAM_NEW);
	}

	PBE2PARAM d2i_PBE2PARAM(PBE2PARAM a, unsigned char *pp, long length)
	{
	M_ASN1_D2I_vars(a,PBE2PARAM *,PBE2PARAM_new);
	M_ASN1_D2I_Init();
	M_ASN1_D2I_start_sequence();
	M_ASN1_D2I_get (ret->keyfunc, d2i_X509_ALGOR);
	M_ASN1_D2I_get (ret->encryption, d2i_X509_ALGOR);
	M_ASN1_D2I_Finish(a, PBE2PARAM_free, ASN1_F_D2I_PBE2PARAM);
	}

	void PBE2PARAM_free (PBE2PARAM *a)
	{
	if(a==NULL) return;
	X509_ALGOR_free(a->keyfunc);
	X509_ALGOR_free(a->encryption);
	Free ((char *)a);
	}

	int i2d_PBKDF2PARAM(PBKDF2PARAM a, unsigned char *pp)
	{
	M_ASN1_I2D_vars(a);
	M_ASN1_I2D_len (a->salt, i2d_ASN1_TYPE);
	M_ASN1_I2D_len (a->iter, i2d_ASN1_INTEGER);
	M_ASN1_I2D_len (a->keylength, i2d_ASN1_INTEGER);
	M_ASN1_I2D_len (a->prf, i2d_X509_ALGOR);

	M_ASN1_I2D_seq_total ();

	M_ASN1_I2D_put (a->salt, i2d_ASN1_TYPE);
	M_ASN1_I2D_put (a->iter, i2d_ASN1_INTEGER);
	M_ASN1_I2D_put (a->keylength, i2d_ASN1_INTEGER);
	M_ASN1_I2D_put (a->prf, i2d_X509_ALGOR);

	M_ASN1_I2D_finish();
	}

	PBKDF2PARAM *PBKDF2PARAM_new(void)
	{
	PBKDF2PARAM *ret=NULL;
	ASN1_CTX c;
	M_ASN1_New_Malloc(ret, PBKDF2PARAM);
	M_ASN1_New(ret->salt, ASN1_TYPE_new);
	M_ASN1_New(ret->iter, ASN1_INTEGER_new);
	ret->keylength = NULL;
	ret->prf = NULL;
	return (ret);
	M_ASN1_New_Error(ASN1_F_PBKDF2PARAM_NEW);
	}

	PBKDF2PARAM d2i_PBKDF2PARAM(PBKDF2PARAM a, unsigned char *pp,
	long length)
	{
	M_ASN1_D2I_vars(a,PBKDF2PARAM *,PBKDF2PARAM_new);
	M_ASN1_D2I_Init();
	M_ASN1_D2I_start_sequence();
	M_ASN1_D2I_get (ret->salt, d2i_ASN1_TYPE);
	M_ASN1_D2I_get (ret->iter, d2i_ASN1_INTEGER);
	M_ASN1_D2I_get_opt (ret->keylength, d2i_ASN1_INTEGER, V_ASN1_INTEGER);
	M_ASN1_D2I_get_opt (ret->prf, d2i_X509_ALGOR, V_ASN1_SEQUENCE);
	M_ASN1_D2I_Finish(a, PBKDF2PARAM_free, ASN1_F_D2I_PBKDF2PARAM);
	}

	void PBKDF2PARAM_free (PBKDF2PARAM *a)
	{
	if(a==NULL) return;
	ASN1_TYPE_free(a->salt);
	ASN1_INTEGER_free(a->iter);
	ASN1_INTEGER_free(a->keylength);
	X509_ALGOR_free(a->prf);
	Free ((char *)a);
	}

	/* 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;

	if(!(pbe2 = PBE2PARAM_new())) goto merr;

	/* Setup the AlgorithmIdentifier for the encryption scheme */
	scheme = pbe2->encryption;

	alg_nid = EVP_CIPHER_type(cipher);

	scheme->algorithm = OBJ_nid2obj(alg_nid);
	if(!(scheme->parameter = ASN1_TYPE_new())) goto merr;

	/* Create random IV */
	RAND_bytes(iv, EVP_CIPHER_iv_length(cipher));

	/* Dummy cipherinit to just setup the IV */
	EVP_CipherInit(&ctx, cipher, 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 = ASN1_OCTET_STRING_new())) goto merr;

	if (!saltlen) saltlen = PKCS5_SALT_LEN;
	if (!(osalt->data = Malloc (saltlen))) goto merr;
	osalt->length = saltlen;
	if (salt) memcpy (osalt->data, salt, saltlen);
	else RAND_bytes (osalt->data, saltlen);

	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 = 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 */
	ASN1_OCTET_STRING_free(osalt);
	PBKDF2PARAM_free(kdf);
	X509_ALGOR_free(kalg);
	X509_ALGOR_free(ret);

	return NULL;

	}