[thirdparty/openssl.git] / crypto / evp / p5_crpt2.c

/* p5_crpt2.c */
/*
 * Written by Dr Stephen N Henson (steve@openssl.org) 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 <stdlib.h>
#include "cryptlib.h"
#if !defined(OPENSSL_NO_HMAC) && !defined(OPENSSL_NO_SHA)
# include <openssl/x509.h>
# include <openssl/evp.h>
# include <openssl/hmac.h>

/* set this to print out info about the keygen algorithm */
/* #define DEBUG_PKCS5V2 */

# ifdef DEBUG_PKCS5V2
static void h__dump(const unsigned char *p, int len);
# endif

/*
 * This is an implementation of PKCS#5 v2.0 password based encryption key
 * derivation function PBKDF2 using the only currently defined function HMAC
 * with SHA1. Verified against test vectors posted by Peter Gutmann
 * <pgut001@cs.auckland.ac.nz> to the PKCS-TNG <pkcs-tng@rsa.com> mailing
 * list.
 */

int PKCS5_PBKDF2_HMAC_SHA1(const char *pass, int passlen,
                           const unsigned char *salt, int saltlen, int iter,
                           int keylen, unsigned char *out)
{
    unsigned char digtmp[SHA_DIGEST_LENGTH], *p, itmp[4];
    int cplen, j, k, tkeylen;
    unsigned long i = 1;
    HMAC_CTX hctx;

    HMAC_CTX_init(&hctx);
    p = out;
    tkeylen = keylen;
    if (!pass)
        passlen = 0;
    else if (passlen == -1)
        passlen = strlen(pass);
    while (tkeylen) {
        if (tkeylen > SHA_DIGEST_LENGTH)
            cplen = SHA_DIGEST_LENGTH;
        else
            cplen = tkeylen;
        /*
         * We are unlikely to ever use more than 256 blocks (5120 bits!) but
         * just in case...
         */
        itmp[0] = (unsigned char)((i >> 24) & 0xff);
        itmp[1] = (unsigned char)((i >> 16) & 0xff);
        itmp[2] = (unsigned char)((i >> 8) & 0xff);
        itmp[3] = (unsigned char)(i & 0xff);
        HMAC_Init_ex(&hctx, pass, passlen, EVP_sha1(), NULL);
        HMAC_Update(&hctx, salt, saltlen);
        HMAC_Update(&hctx, itmp, 4);
        HMAC_Final(&hctx, digtmp, NULL);
        memcpy(p, digtmp, cplen);
        for (j = 1; j < iter; j++) {
            HMAC(EVP_sha1(), pass, passlen,
                 digtmp, SHA_DIGEST_LENGTH, digtmp, NULL);
            for (k = 0; k < cplen; k++)
                p[k] ^= digtmp[k];
        }
        tkeylen -= cplen;
        i++;
        p += cplen;
    }
    HMAC_CTX_cleanup(&hctx);
# ifdef DEBUG_PKCS5V2
    fprintf(stderr, "Password:\n");
    h__dump(pass, passlen);
    fprintf(stderr, "Salt:\n");
    h__dump(salt, saltlen);
    fprintf(stderr, "Iteration count %d\n", iter);
    fprintf(stderr, "Key:\n");
    h__dump(out, keylen);
# endif
    return 1;
}

# ifdef DO_TEST
main()
{
    unsigned char out[4];
    unsigned char salt[] = { 0x12, 0x34, 0x56, 0x78 };
    PKCS5_PBKDF2_HMAC_SHA1("password", -1, salt, 4, 5, 4, out);
    fprintf(stderr, "Out %02X %02X %02X %02X\n",
            out[0], out[1], out[2], out[3]);
}

# endif

/*
 * Now the key derivation function itself. This is a bit evil because it has
 * to check the ASN1 parameters are valid: and there are quite a few of
 * them...
 */

int PKCS5_v2_PBE_keyivgen(EVP_CIPHER_CTX *ctx, const char *pass, int passlen,
                          ASN1_TYPE *param, const EVP_CIPHER *c,
                          const EVP_MD *md, int en_de)
{
    unsigned char *salt, key[EVP_MAX_KEY_LENGTH];
    const unsigned char *pbuf;
    int saltlen, iter, plen;
    unsigned int keylen;
    PBE2PARAM *pbe2 = NULL;
    const EVP_CIPHER *cipher;
    PBKDF2PARAM *kdf = NULL;

    if (param == NULL || param->type != V_ASN1_SEQUENCE ||
        param->value.sequence == NULL) {
        EVPerr(EVP_F_PKCS5_V2_PBE_KEYIVGEN, EVP_R_DECODE_ERROR);
        return 0;
    }

    pbuf = param->value.sequence->data;
    plen = param->value.sequence->length;
    if (!(pbe2 = d2i_PBE2PARAM(NULL, &pbuf, plen))) {
        EVPerr(EVP_F_PKCS5_V2_PBE_KEYIVGEN, EVP_R_DECODE_ERROR);
        return 0;
    }

    /* See if we recognise the key derivation function */

    if (OBJ_obj2nid(pbe2->keyfunc->algorithm) != NID_id_pbkdf2) {
        EVPerr(EVP_F_PKCS5_V2_PBE_KEYIVGEN,
               EVP_R_UNSUPPORTED_KEY_DERIVATION_FUNCTION);
        goto err;
    }

    /*
     * lets see if we recognise the encryption algorithm.
     */

    cipher =
        EVP_get_cipherbyname(OBJ_nid2sn
                             (OBJ_obj2nid(pbe2->encryption->algorithm)));

    if (!cipher) {
        EVPerr(EVP_F_PKCS5_V2_PBE_KEYIVGEN, EVP_R_UNSUPPORTED_CIPHER);
        goto err;
    }

    /* Fixup cipher based on AlgorithmIdentifier */
    EVP_CipherInit_ex(ctx, cipher, NULL, NULL, NULL, en_de);
    if (EVP_CIPHER_asn1_to_param(ctx, pbe2->encryption->parameter) < 0) {
        EVPerr(EVP_F_PKCS5_V2_PBE_KEYIVGEN, EVP_R_CIPHER_PARAMETER_ERROR);
        goto err;
    }
    keylen = EVP_CIPHER_CTX_key_length(ctx);
    OPENSSL_assert(keylen <= sizeof key);

    /* Now decode key derivation function */

    if (!pbe2->keyfunc->parameter ||
        (pbe2->keyfunc->parameter->type != V_ASN1_SEQUENCE)) {
        EVPerr(EVP_F_PKCS5_V2_PBE_KEYIVGEN, EVP_R_DECODE_ERROR);
        goto err;
    }

    pbuf = pbe2->keyfunc->parameter->value.sequence->data;
    plen = pbe2->keyfunc->parameter->value.sequence->length;
    if (!(kdf = d2i_PBKDF2PARAM(NULL, &pbuf, plen))) {
        EVPerr(EVP_F_PKCS5_V2_PBE_KEYIVGEN, EVP_R_DECODE_ERROR);
        goto err;
    }

    PBE2PARAM_free(pbe2);
    pbe2 = NULL;

    /* Now check the parameters of the kdf */

    if (kdf->keylength && (ASN1_INTEGER_get(kdf->keylength) != (int)keylen)) {
        EVPerr(EVP_F_PKCS5_V2_PBE_KEYIVGEN, EVP_R_UNSUPPORTED_KEYLENGTH);
        goto err;
    }

    if (kdf->prf && (OBJ_obj2nid(kdf->prf->algorithm) != NID_hmacWithSHA1)) {
        EVPerr(EVP_F_PKCS5_V2_PBE_KEYIVGEN, EVP_R_UNSUPPORTED_PRF);
        goto err;
    }

    if (kdf->salt->type != V_ASN1_OCTET_STRING) {
        EVPerr(EVP_F_PKCS5_V2_PBE_KEYIVGEN, EVP_R_UNSUPPORTED_SALT_TYPE);
        goto err;
    }

    /* it seems that its all OK */
    salt = kdf->salt->value.octet_string->data;
    saltlen = kdf->salt->value.octet_string->length;
    iter = ASN1_INTEGER_get(kdf->iter);
    PKCS5_PBKDF2_HMAC_SHA1(pass, passlen, salt, saltlen, iter, keylen, key);
    EVP_CipherInit_ex(ctx, NULL, NULL, key, NULL, en_de);
    OPENSSL_cleanse(key, keylen);
    PBKDF2PARAM_free(kdf);
    return 1;

 err:
    PBE2PARAM_free(pbe2);
    PBKDF2PARAM_free(kdf);
    return 0;
}

# ifdef DEBUG_PKCS5V2
static void h__dump(const unsigned char *p, int len)
{
    for (; len--; p++)
        fprintf(stderr, "%02X ", *p);
    fprintf(stderr, "\n");
}
# endif
#endif
Commit	Line	Data
97e4a932	1	/* p5_crpt2.c */
40720ce3 MC	2	/*
	3	* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
	4	* 1999.
97e4a932 DSH	5	*/
	6	/* ====================================================================
	7	* Copyright (c) 1999 The OpenSSL Project. All rights reserved.
	8	*
	9	* Redistribution and use in source and binary forms, with or without
	10	* modification, are permitted provided that the following conditions
	11	* are met:
	12	*
	13	* 1. Redistributions of source code must retain the above copyright
40720ce3	14	* notice, this list of conditions and the following disclaimer.
97e4a932 DSH	15	*
	16	* 2. Redistributions in binary form must reproduce the above copyright
	17	* notice, this list of conditions and the following disclaimer in
	18	* the documentation and/or other materials provided with the
	19	* distribution.
	20	*
	21	* 3. All advertising materials mentioning features or use of this
	22	* software must display the following acknowledgment:
	23	* "This product includes software developed by the OpenSSL Project
	24	* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
	25	*
	26	* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
	27	* endorse or promote products derived from this software without
	28	* prior written permission. For written permission, please contact
	29	* licensing@OpenSSL.org.
	30	*
	31	* 5. Products derived from this software may not be called "OpenSSL"
	32	* nor may "OpenSSL" appear in their names without prior written
	33	* permission of the OpenSSL Project.
	34	*
	35	* 6. Redistributions of any form whatsoever must retain the following
	36	* acknowledgment:
	37	* "This product includes software developed by the OpenSSL Project
	38	* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
	39	*
	40	* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
	41	* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	42	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
	43	* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
	44	* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
	45	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
	46	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
	47	* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	48	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
	49	* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
	50	* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
	51	* OF THE POSSIBILITY OF SUCH DAMAGE.
	52	* ====================================================================
	53	*
	54	* This product includes cryptographic software written by Eric Young
	55	* (eay@cryptsoft.com). This product includes software written by Tim
	56	* Hudson (tjh@cryptsoft.com).
	57	*
	58	*/
	59	#include <stdio.h>
	60	#include <stdlib.h>
7b63c0fa	61	#include "cryptlib.h"
9c354528	62	#if !defined(OPENSSL_NO_HMAC) && !defined(OPENSSL_NO_SHA)
40720ce3 MC	63	# include <openssl/x509.h>
	64	# include <openssl/evp.h>
	65	# include <openssl/hmac.h>
97e4a932	66
f513939e DSH	67	/* set this to print out info about the keygen algorithm */
	68	/* #define DEBUG_PKCS5V2 */
	69
40720ce3 MC	70	# ifdef DEBUG_PKCS5V2
	71	static void h__dump(const unsigned char *p, int len);
	72	# endif
f513939e	73
40720ce3 MC	74	/*
40720ce3 MC	75	* This is an implementation of PKCS#5 v2.0 password based encryption key
97e4a932 DSH	76	* derivation function PBKDF2 using the only currently defined function HMAC
97e4a932 DSH	77	* with SHA1. Verified against test vectors posted by Peter Gutmann
40720ce3 MC	78	* <pgut001@cs.auckland.ac.nz> to the PKCS-TNG <pkcs-tng@rsa.com> mailing
40720ce3 MC	79	* list.
97e4a932 DSH	80	*/
	81
	82	int PKCS5_PBKDF2_HMAC_SHA1(const char *pass, int passlen,
40720ce3 MC	83	const unsigned char *salt, int saltlen, int iter,
40720ce3 MC	84	int keylen, unsigned char *out)
97e4a932	85	{
40720ce3 MC	86	unsigned char digtmp[SHA_DIGEST_LENGTH], *p, itmp[4];
	87	int cplen, j, k, tkeylen;
	88	unsigned long i = 1;
	89	HMAC_CTX hctx;
dbad1690	90
40720ce3 MC	91	HMAC_CTX_init(&hctx);
	92	p = out;
	93	tkeylen = keylen;
	94	if (!pass)
	95	passlen = 0;
	96	else if (passlen == -1)
	97	passlen = strlen(pass);
	98	while (tkeylen) {
	99	if (tkeylen > SHA_DIGEST_LENGTH)
	100	cplen = SHA_DIGEST_LENGTH;
	101	else
	102	cplen = tkeylen;
	103	/*
	104	* We are unlikely to ever use more than 256 blocks (5120 bits!) but
	105	* just in case...
	106	*/
	107	itmp[0] = (unsigned char)((i >> 24) & 0xff);
	108	itmp[1] = (unsigned char)((i >> 16) & 0xff);
	109	itmp[2] = (unsigned char)((i >> 8) & 0xff);
	110	itmp[3] = (unsigned char)(i & 0xff);
	111	HMAC_Init_ex(&hctx, pass, passlen, EVP_sha1(), NULL);
	112	HMAC_Update(&hctx, salt, saltlen);
	113	HMAC_Update(&hctx, itmp, 4);
	114	HMAC_Final(&hctx, digtmp, NULL);
	115	memcpy(p, digtmp, cplen);
	116	for (j = 1; j < iter; j++) {
	117	HMAC(EVP_sha1(), pass, passlen,
	118	digtmp, SHA_DIGEST_LENGTH, digtmp, NULL);
	119	for (k = 0; k < cplen; k++)
	120	p[k] ^= digtmp[k];
	121	}
	122	tkeylen -= cplen;
	123	i++;
	124	p += cplen;
	125	}
	126	HMAC_CTX_cleanup(&hctx);
	127	# ifdef DEBUG_PKCS5V2
	128	fprintf(stderr, "Password:\n");
	129	h__dump(pass, passlen);
	130	fprintf(stderr, "Salt:\n");
	131	h__dump(salt, saltlen);
	132	fprintf(stderr, "Iteration count %d\n", iter);
	133	fprintf(stderr, "Key:\n");
	134	h__dump(out, keylen);
	135	# endif
	136	return 1;
97e4a932 DSH	137	}
97e4a932 DSH	138
40720ce3	139	# ifdef DO_TEST
97e4a932 DSH	140	main()
97e4a932 DSH	141	{
40720ce3 MC	142	unsigned char out[4];
	143	unsigned char salt[] = { 0x12, 0x34, 0x56, 0x78 };
	144	PKCS5_PBKDF2_HMAC_SHA1("password", -1, salt, 4, 5, 4, out);
	145	fprintf(stderr, "Out %02X %02X %02X %02X\n",
	146	out[0], out[1], out[2], out[3]);
97e4a932 DSH	147	}
97e4a932 DSH	148
40720ce3	149	# endif
97e4a932	150
40720ce3 MC	151	/*
	152	* Now the key derivation function itself. This is a bit evil because it has
	153	* to check the ASN1 parameters are valid: and there are quite a few of
	154	* them...
97e4a932 DSH	155	*/
	156
	157	int PKCS5_v2_PBE_keyivgen(EVP_CIPHER_CTX ctx, const char pass, int passlen,
40720ce3 MC	158	ASN1_TYPE param, const EVP_CIPHER c,
40720ce3 MC	159	const EVP_MD *md, int en_de)
97e4a932	160	{
40720ce3 MC	161	unsigned char *salt, key[EVP_MAX_KEY_LENGTH];
	162	const unsigned char *pbuf;
	163	int saltlen, iter, plen;
	164	unsigned int keylen;
	165	PBE2PARAM *pbe2 = NULL;
	166	const EVP_CIPHER *cipher;
	167	PBKDF2PARAM *kdf = NULL;
97e4a932	168
40720ce3 MC	169	if (param == NULL \|\| param->type != V_ASN1_SEQUENCE \|\|
	170	param->value.sequence == NULL) {
	171	EVPerr(EVP_F_PKCS5_V2_PBE_KEYIVGEN, EVP_R_DECODE_ERROR);
	172	return 0;
	173	}
3de6d65e	174
40720ce3 MC	175	pbuf = param->value.sequence->data;
	176	plen = param->value.sequence->length;
	177	if (!(pbe2 = d2i_PBE2PARAM(NULL, &pbuf, plen))) {
	178	EVPerr(EVP_F_PKCS5_V2_PBE_KEYIVGEN, EVP_R_DECODE_ERROR);
	179	return 0;
	180	}
97e4a932	181
40720ce3	182	/* See if we recognise the key derivation function */
97e4a932	183
40720ce3 MC	184	if (OBJ_obj2nid(pbe2->keyfunc->algorithm) != NID_id_pbkdf2) {
	185	EVPerr(EVP_F_PKCS5_V2_PBE_KEYIVGEN,
	186	EVP_R_UNSUPPORTED_KEY_DERIVATION_FUNCTION);
	187	goto err;
	188	}
97e4a932	189
40720ce3 MC	190	/*
	191	* lets see if we recognise the encryption algorithm.
	192	*/
97e4a932	193
40720ce3 MC	194	cipher =
	195	EVP_get_cipherbyname(OBJ_nid2sn
	196	(OBJ_obj2nid(pbe2->encryption->algorithm)));
97e4a932	197
40720ce3 MC	198	if (!cipher) {
	199	EVPerr(EVP_F_PKCS5_V2_PBE_KEYIVGEN, EVP_R_UNSUPPORTED_CIPHER);
	200	goto err;
	201	}
97e4a932	202
40720ce3 MC	203	/* Fixup cipher based on AlgorithmIdentifier */
	204	EVP_CipherInit_ex(ctx, cipher, NULL, NULL, NULL, en_de);
	205	if (EVP_CIPHER_asn1_to_param(ctx, pbe2->encryption->parameter) < 0) {
	206	EVPerr(EVP_F_PKCS5_V2_PBE_KEYIVGEN, EVP_R_CIPHER_PARAMETER_ERROR);
	207	goto err;
	208	}
	209	keylen = EVP_CIPHER_CTX_key_length(ctx);
	210	OPENSSL_assert(keylen <= sizeof key);
97e4a932	211
40720ce3	212	/* Now decode key derivation function */
97e4a932	213
40720ce3 MC	214	if (!pbe2->keyfunc->parameter \|\|
	215	(pbe2->keyfunc->parameter->type != V_ASN1_SEQUENCE)) {
	216	EVPerr(EVP_F_PKCS5_V2_PBE_KEYIVGEN, EVP_R_DECODE_ERROR);
	217	goto err;
	218	}
b095418d	219
40720ce3 MC	220	pbuf = pbe2->keyfunc->parameter->value.sequence->data;
	221	plen = pbe2->keyfunc->parameter->value.sequence->length;
	222	if (!(kdf = d2i_PBKDF2PARAM(NULL, &pbuf, plen))) {
	223	EVPerr(EVP_F_PKCS5_V2_PBE_KEYIVGEN, EVP_R_DECODE_ERROR);
	224	goto err;
	225	}
97e4a932	226
40720ce3 MC	227	PBE2PARAM_free(pbe2);
40720ce3 MC	228	pbe2 = NULL;
97e4a932	229
40720ce3	230	/* Now check the parameters of the kdf */
97e4a932	231
40720ce3 MC	232	if (kdf->keylength && (ASN1_INTEGER_get(kdf->keylength) != (int)keylen)) {
	233	EVPerr(EVP_F_PKCS5_V2_PBE_KEYIVGEN, EVP_R_UNSUPPORTED_KEYLENGTH);
	234	goto err;
	235	}
97e4a932	236
40720ce3 MC	237	if (kdf->prf && (OBJ_obj2nid(kdf->prf->algorithm) != NID_hmacWithSHA1)) {
	238	EVPerr(EVP_F_PKCS5_V2_PBE_KEYIVGEN, EVP_R_UNSUPPORTED_PRF);
	239	goto err;
	240	}
97e4a932	241
40720ce3 MC	242	if (kdf->salt->type != V_ASN1_OCTET_STRING) {
	243	EVPerr(EVP_F_PKCS5_V2_PBE_KEYIVGEN, EVP_R_UNSUPPORTED_SALT_TYPE);
	244	goto err;
	245	}
97e4a932	246
40720ce3 MC	247	/* it seems that its all OK */
	248	salt = kdf->salt->value.octet_string->data;
	249	saltlen = kdf->salt->value.octet_string->length;
	250	iter = ASN1_INTEGER_get(kdf->iter);
	251	PKCS5_PBKDF2_HMAC_SHA1(pass, passlen, salt, saltlen, iter, keylen, key);
	252	EVP_CipherInit_ex(ctx, NULL, NULL, key, NULL, en_de);
	253	OPENSSL_cleanse(key, keylen);
	254	PBKDF2PARAM_free(kdf);
	255	return 1;
97e4a932	256
40720ce3 MC	257	err:
	258	PBE2PARAM_free(pbe2);
	259	PBKDF2PARAM_free(kdf);
	260	return 0;
97e4a932	261	}
f513939e	262
40720ce3 MC	263	# ifdef DEBUG_PKCS5V2
40720ce3 MC	264	static void h__dump(const unsigned char *p, int len)
f513939e	265	{
40720ce3 MC	266	for (; len--; p++)
	267	fprintf(stderr, "%02X ", *p);
	268	fprintf(stderr, "\n");
f513939e	269	}
40720ce3	270	# endif
9a3bbbce	271	#endif