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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	lib/libcrypto/crypto/../../libssl/src/crypto/evp/p5_crpt2.c	Lines:	33	119	27.7 %
Date:	2016-12-06	Branches:	19	70	27.1 %


/* $OpenBSD: p5_crpt2.c,v 1.21 2015/09/10 15:56:25 jsing Exp $ */
/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
 * project 1999.
 */
/* ====================================================================
 * Copyright (c) 1999-2006 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 <string.h>

#include <openssl/opensslconf.h>

#if !defined(OPENSSL_NO_HMAC) && !defined(OPENSSL_NO_SHA)

#include <openssl/err.h>
#include <openssl/evp.h>
#include <openssl/hmac.h>
#include <openssl/x509.h>

#include "evp_locl.h"

/* This is an implementation of PKCS#5 v2.0 password based encryption key
 * derivation function PBKDF2.
 * SHA1 version 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(const char *pass, int passlen, const unsigned char *salt,
    int saltlen, int iter, const EVP_MD *digest, int keylen, unsigned char *out)
{
	unsigned char digtmp[EVP_MAX_MD_SIZE], *p, itmp[4];
	int cplen, j, k, tkeylen, mdlen;
	unsigned long i = 1;
	HMAC_CTX hctx_tpl, hctx;

	mdlen = EVP_MD_size(digest);
	if (mdlen < 0)
		return 0;

	HMAC_CTX_init(&hctx_tpl);
	p = out;
	tkeylen = keylen;
	if (!pass)
		passlen = 0;
	else if (passlen == -1)
		passlen = strlen(pass);
	if (!HMAC_Init_ex(&hctx_tpl, pass, passlen, digest, NULL)) {
		HMAC_CTX_cleanup(&hctx_tpl);
		return 0;
	}
	while (tkeylen) {
		if (tkeylen > mdlen)
			cplen = mdlen;
		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);
		if (!HMAC_CTX_copy(&hctx, &hctx_tpl)) {
			HMAC_CTX_cleanup(&hctx_tpl);
			return 0;
		}
		if (!HMAC_Update(&hctx, salt, saltlen) ||
		    !HMAC_Update(&hctx, itmp, 4) ||
		    !HMAC_Final(&hctx, digtmp, NULL)) {
			HMAC_CTX_cleanup(&hctx_tpl);
			HMAC_CTX_cleanup(&hctx);
			return 0;
		}
		HMAC_CTX_cleanup(&hctx);
		memcpy(p, digtmp, cplen);
		for (j = 1; j < iter; j++) {
			if (!HMAC_CTX_copy(&hctx, &hctx_tpl)) {
				HMAC_CTX_cleanup(&hctx_tpl);
				return 0;
			}
			if (!HMAC_Update(&hctx, digtmp, mdlen) ||
			    !HMAC_Final(&hctx, digtmp, NULL)) {
				HMAC_CTX_cleanup(&hctx_tpl);
				HMAC_CTX_cleanup(&hctx);
				return 0;
			}
			HMAC_CTX_cleanup(&hctx);
			for (k = 0; k < cplen; k++)
				p[k] ^= digtmp[k];
		}
		tkeylen -= cplen;
		i++;
		p += cplen;
	}
	HMAC_CTX_cleanup(&hctx_tpl);
	return 1;
}

int
PKCS5_PBKDF2_HMAC_SHA1(const char *pass, int passlen, const unsigned char *salt,
    int saltlen, int iter, int keylen, unsigned char *out)
{
	return PKCS5_PBKDF2_HMAC(pass, passlen, salt, saltlen, iter,
	    EVP_sha1(), keylen, out);
}

/* 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)
{
	const unsigned char *pbuf;
	int plen;
	PBE2PARAM *pbe2 = NULL;
	const EVP_CIPHER *cipher;

	int rv = 0;

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

	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);
		goto err;
	}

	/* 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_cipherbyobj(pbe2->encryption->algorithm);

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

	/* Fixup cipher based on AlgorithmIdentifier */
	if (!EVP_CipherInit_ex(ctx, cipher, NULL, NULL, NULL, en_de))
		goto err;
	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;
	}
	rv = PKCS5_v2_PBKDF2_keyivgen(ctx, pass, passlen,
	    pbe2->keyfunc->parameter, c, md, en_de);

err:
	PBE2PARAM_free(pbe2);
	return rv;
}

int
PKCS5_v2_PBKDF2_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;
	int rv = 0;
	unsigned int keylen = 0;
	int prf_nid, hmac_md_nid;
	PBKDF2PARAM *kdf = NULL;
	const EVP_MD *prfmd;

	if (EVP_CIPHER_CTX_cipher(ctx) == NULL) {
		EVPerr(EVP_F_PKCS5_V2_PBKDF2_KEYIVGEN, EVP_R_NO_CIPHER_SET);
		return 0;
	}
	keylen = EVP_CIPHER_CTX_key_length(ctx);
	if (keylen > sizeof key) {
		EVPerr(EVP_F_PKCS5_V2_PBKDF2_KEYIVGEN, EVP_R_BAD_KEY_LENGTH);
		return 0;
	}

	/* Decode parameter */

	if (!param || (param->type != V_ASN1_SEQUENCE)) {
		EVPerr(EVP_F_PKCS5_V2_PBKDF2_KEYIVGEN, EVP_R_DECODE_ERROR);
		return 0;
	}

	pbuf = param->value.sequence->data;
	plen = param->value.sequence->length;

	if (!(kdf = d2i_PBKDF2PARAM(NULL, &pbuf, plen)) ) {
		EVPerr(EVP_F_PKCS5_V2_PBKDF2_KEYIVGEN, EVP_R_DECODE_ERROR);
		return 0;
	}

	/* Now check the parameters of the kdf */

	if (kdf->keylength &&
	    (ASN1_INTEGER_get(kdf->keylength) != (int)keylen)){
		EVPerr(EVP_F_PKCS5_V2_PBKDF2_KEYIVGEN,
		    EVP_R_UNSUPPORTED_KEYLENGTH);
		goto err;
	}

	if (kdf->prf)
		prf_nid = OBJ_obj2nid(kdf->prf->algorithm);
	else
		prf_nid = NID_hmacWithSHA1;

	if (!EVP_PBE_find(EVP_PBE_TYPE_PRF, prf_nid, NULL, &hmac_md_nid, 0)) {
		EVPerr(EVP_F_PKCS5_V2_PBKDF2_KEYIVGEN, EVP_R_UNSUPPORTED_PRF);
		goto err;
	}

	prfmd = EVP_get_digestbynid(hmac_md_nid);
	if (prfmd == NULL) {
		EVPerr(EVP_F_PKCS5_V2_PBKDF2_KEYIVGEN, EVP_R_UNSUPPORTED_PRF);
		goto err;
	}

	if (kdf->salt->type != V_ASN1_OCTET_STRING) {
		EVPerr(EVP_F_PKCS5_V2_PBKDF2_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);
	if (!PKCS5_PBKDF2_HMAC(pass, passlen, salt, saltlen, iter, prfmd,
	    keylen, key))
		goto err;
	rv = EVP_CipherInit_ex(ctx, NULL, NULL, key, NULL, en_de);

err:
	explicit_bzero(key, keylen);
	PBKDF2PARAM_free(kdf);
	return rv;
}

#endif


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: p5_crpt2.c,v 1.21 2015/09/10 15:56:25 jsing Exp $ */
2			/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
3			* project 1999.
4			*/
5			/* ====================================================================
6			* Copyright (c) 1999-2006 The OpenSSL Project. All rights reserved.
7			*
8			* Redistribution and use in source and binary forms, with or without
9			* modification, are permitted provided that the following conditions
10			* are met:
11			*
12			* 1. Redistributions of source code must retain the above copyright
13			* notice, this list of conditions and the following disclaimer.
14			*
15			* 2. Redistributions in binary form must reproduce the above copyright
16			* notice, this list of conditions and the following disclaimer in
17			* the documentation and/or other materials provided with the
18			* distribution.
19			*
20			* 3. All advertising materials mentioning features or use of this
21			* software must display the following acknowledgment:
22			* "This product includes software developed by the OpenSSL Project
23			* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
24			*
25			* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
26			* endorse or promote products derived from this software without
27			* prior written permission. For written permission, please contact
28			* licensing@OpenSSL.org.
29			*
30			* 5. Products derived from this software may not be called "OpenSSL"
31			* nor may "OpenSSL" appear in their names without prior written
32			* permission of the OpenSSL Project.
33			*
34			* 6. Redistributions of any form whatsoever must retain the following
35			* acknowledgment:
36			* "This product includes software developed by the OpenSSL Project
37			* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
38			*
39			* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
40			* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41			* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42			* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
43			* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44			* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45			* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46			* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47			* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
48			* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49			* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50			* OF THE POSSIBILITY OF SUCH DAMAGE.
51			* ====================================================================
52			*
53			* This product includes cryptographic software written by Eric Young
54			* (eay@cryptsoft.com). This product includes software written by Tim
55			* Hudson (tjh@cryptsoft.com).
56			*
57			*/
58
59			#include <stdio.h>
60			#include <stdlib.h>
61			#include <string.h>
62
63			#include <openssl/opensslconf.h>
64
65			#if !defined(OPENSSL_NO_HMAC) && !defined(OPENSSL_NO_SHA)
66
67			#include <openssl/err.h>
68			#include <openssl/evp.h>
69			#include <openssl/hmac.h>
70			#include <openssl/x509.h>
71
72			#include "evp_locl.h"
73
74			/* This is an implementation of PKCS#5 v2.0 password based encryption key
75			* derivation function PBKDF2.
76			* SHA1 version verified against test vectors posted by Peter Gutmann
77			* <pgut001@cs.auckland.ac.nz> to the PKCS-TNG <pkcs-tng@rsa.com> mailing list.
78			*/
79
80			int
81			PKCS5_PBKDF2_HMAC(const char pass, int passlen, const unsigned char salt,
82			int saltlen, int iter, const EVP_MD digest, int keylen, unsigned char out)
83		15	{
84			unsigned char digtmp[EVP_MAX_MD_SIZE], *p, itmp[4];
85			int cplen, j, k, tkeylen, mdlen;
86		15	unsigned long i = 1;
87			HMAC_CTX hctx_tpl, hctx;
88
89		15	mdlen = EVP_MD_size(digest);
90	✗✓	15	if (mdlen < 0)
91			return 0;
92
93		15	HMAC_CTX_init(&hctx_tpl);
94		15	p = out;
95		15	tkeylen = keylen;
96	✗✓	15	if (!pass)
97			passlen = 0;
98	✗✓	15	else if (passlen == -1)
99			passlen = strlen(pass);
100	✗✓	15	if (!HMAC_Init_ex(&hctx_tpl, pass, passlen, digest, NULL)) {
101			HMAC_CTX_cleanup(&hctx_tpl);
102			return 0;
103			}
104	✓✓	32	while (tkeylen) {
105	✓✓	17	if (tkeylen > mdlen)
106		2	cplen = mdlen;
107			else
108		15	cplen = tkeylen;
109			/* We are unlikely to ever use more than 256 blocks (5120 bits!)
110			* but just in case...
111			*/
112		17	itmp[0] = (unsigned char)((i >> 24) & 0xff);
113		17	itmp[1] = (unsigned char)((i >> 16) & 0xff);
114		17	itmp[2] = (unsigned char)((i >> 8) & 0xff);
115		17	itmp[3] = (unsigned char)(i & 0xff);
116	✗✓	17	if (!HMAC_CTX_copy(&hctx, &hctx_tpl)) {
117			HMAC_CTX_cleanup(&hctx_tpl);
118			return 0;
119			}
120	✓✗✓✗ ✗✓	17	if (!HMAC_Update(&hctx, salt, saltlen) \|\|
121			!HMAC_Update(&hctx, itmp, 4) \|\|
122			!HMAC_Final(&hctx, digtmp, NULL)) {
123			HMAC_CTX_cleanup(&hctx_tpl);
124			HMAC_CTX_cleanup(&hctx);
125			return 0;
126			}
127		17	HMAC_CTX_cleanup(&hctx);
128		17	memcpy(p, digtmp, cplen);
129	✓✓	45065	for (j = 1; j < iter; j++) {
130	✗✓	45048	if (!HMAC_CTX_copy(&hctx, &hctx_tpl)) {
131			HMAC_CTX_cleanup(&hctx_tpl);
132			return 0;
133			}
134	✓✗✗✓	45048	if (!HMAC_Update(&hctx, digtmp, mdlen) \|\|
135			!HMAC_Final(&hctx, digtmp, NULL)) {
136			HMAC_CTX_cleanup(&hctx_tpl);
137			HMAC_CTX_cleanup(&hctx);
138			return 0;
139			}
140		45048	HMAC_CTX_cleanup(&hctx);
141	✓✓	1244999	for (k = 0; k < cplen; k++)
142		1199951	p[k] ^= digtmp[k];
143			}
144		17	tkeylen -= cplen;
145		17	i++;
146		17	p += cplen;
147			}
148		15	HMAC_CTX_cleanup(&hctx_tpl);
149		15	return 1;
150			}
151
152			int
153			PKCS5_PBKDF2_HMAC_SHA1(const char pass, int passlen, const unsigned char salt,
154			int saltlen, int iter, int keylen, unsigned char *out)
155			{
156			return PKCS5_PBKDF2_HMAC(pass, passlen, salt, saltlen, iter,
157			EVP_sha1(), keylen, out);
158			}
159
160			/* Now the key derivation function itself. This is a bit evil because
161			* it has to check the ASN1 parameters are valid: and there are quite a
162			* few of them...
163			*/
164
165			int
166			PKCS5_v2_PBE_keyivgen(EVP_CIPHER_CTX ctx, const char pass, int passlen,
167			ASN1_TYPE param, const EVP_CIPHER c, const EVP_MD *md, int en_de)
168			{
169			const unsigned char *pbuf;
170			int plen;
171			PBE2PARAM *pbe2 = NULL;
172			const EVP_CIPHER *cipher;
173
174			int rv = 0;
175
176			if (param == NULL \|\| param->type != V_ASN1_SEQUENCE \|\|
177			param->value.sequence == NULL) {
178			EVPerr(EVP_F_PKCS5_V2_PBE_KEYIVGEN, EVP_R_DECODE_ERROR);
179			goto err;
180			}
181
182			pbuf = param->value.sequence->data;
183			plen = param->value.sequence->length;
184			if (!(pbe2 = d2i_PBE2PARAM(NULL, &pbuf, plen))) {
185			EVPerr(EVP_F_PKCS5_V2_PBE_KEYIVGEN, EVP_R_DECODE_ERROR);
186			goto err;
187			}
188
189			/* See if we recognise the key derivation function */
190
191			if (OBJ_obj2nid(pbe2->keyfunc->algorithm) != NID_id_pbkdf2) {
192			EVPerr(EVP_F_PKCS5_V2_PBE_KEYIVGEN,
193			EVP_R_UNSUPPORTED_KEY_DERIVATION_FUNCTION);
194			goto err;
195			}
196
197			/* lets see if we recognise the encryption algorithm.
198			*/
199
200			cipher = EVP_get_cipherbyobj(pbe2->encryption->algorithm);
201
202			if (!cipher) {
203			EVPerr(EVP_F_PKCS5_V2_PBE_KEYIVGEN,
204			EVP_R_UNSUPPORTED_CIPHER);
205			goto err;
206			}
207
208			/* Fixup cipher based on AlgorithmIdentifier */
209			if (!EVP_CipherInit_ex(ctx, cipher, NULL, NULL, NULL, en_de))
210			goto err;
211			if (EVP_CIPHER_asn1_to_param(ctx, pbe2->encryption->parameter) < 0) {
212			EVPerr(EVP_F_PKCS5_V2_PBE_KEYIVGEN,
213			EVP_R_CIPHER_PARAMETER_ERROR);
214			goto err;
215			}
216			rv = PKCS5_v2_PBKDF2_keyivgen(ctx, pass, passlen,
217			pbe2->keyfunc->parameter, c, md, en_de);
218
219			err:
220			PBE2PARAM_free(pbe2);
221			return rv;
222			}
223
224			int
225			PKCS5_v2_PBKDF2_keyivgen(EVP_CIPHER_CTX ctx, const char pass, int passlen,
226			ASN1_TYPE param, const EVP_CIPHER c, const EVP_MD *md, int en_de)
227			{
228			unsigned char *salt, key[EVP_MAX_KEY_LENGTH];
229			const unsigned char *pbuf;
230			int saltlen, iter, plen;
231			int rv = 0;
232			unsigned int keylen = 0;
233			int prf_nid, hmac_md_nid;
234			PBKDF2PARAM *kdf = NULL;
235			const EVP_MD *prfmd;
236
237			if (EVP_CIPHER_CTX_cipher(ctx) == NULL) {
238			EVPerr(EVP_F_PKCS5_V2_PBKDF2_KEYIVGEN, EVP_R_NO_CIPHER_SET);
239			return 0;
240			}
241			keylen = EVP_CIPHER_CTX_key_length(ctx);
242			if (keylen > sizeof key) {
243			EVPerr(EVP_F_PKCS5_V2_PBKDF2_KEYIVGEN, EVP_R_BAD_KEY_LENGTH);
244			return 0;
245			}
246
247			/* Decode parameter */
248
249			if (!param \|\| (param->type != V_ASN1_SEQUENCE)) {
250			EVPerr(EVP_F_PKCS5_V2_PBKDF2_KEYIVGEN, EVP_R_DECODE_ERROR);
251			return 0;
252			}
253
254			pbuf = param->value.sequence->data;
255			plen = param->value.sequence->length;
256
257			if (!(kdf = d2i_PBKDF2PARAM(NULL, &pbuf, plen)) ) {
258			EVPerr(EVP_F_PKCS5_V2_PBKDF2_KEYIVGEN, EVP_R_DECODE_ERROR);
259			return 0;
260			}
261
262			/* Now check the parameters of the kdf */
263
264			if (kdf->keylength &&
265			(ASN1_INTEGER_get(kdf->keylength) != (int)keylen)){
266			EVPerr(EVP_F_PKCS5_V2_PBKDF2_KEYIVGEN,
267			EVP_R_UNSUPPORTED_KEYLENGTH);
268			goto err;
269			}
270
271			if (kdf->prf)
272			prf_nid = OBJ_obj2nid(kdf->prf->algorithm);
273			else
274			prf_nid = NID_hmacWithSHA1;
275
276			if (!EVP_PBE_find(EVP_PBE_TYPE_PRF, prf_nid, NULL, &hmac_md_nid, 0)) {
277			EVPerr(EVP_F_PKCS5_V2_PBKDF2_KEYIVGEN, EVP_R_UNSUPPORTED_PRF);
278			goto err;
279			}
280
281			prfmd = EVP_get_digestbynid(hmac_md_nid);
282			if (prfmd == NULL) {
283			EVPerr(EVP_F_PKCS5_V2_PBKDF2_KEYIVGEN, EVP_R_UNSUPPORTED_PRF);
284			goto err;
285			}
286
287			if (kdf->salt->type != V_ASN1_OCTET_STRING) {
288			EVPerr(EVP_F_PKCS5_V2_PBKDF2_KEYIVGEN,
289			EVP_R_UNSUPPORTED_SALT_TYPE);
290			goto err;
291			}
292
293			/* it seems that its all OK */
294			salt = kdf->salt->value.octet_string->data;
295			saltlen = kdf->salt->value.octet_string->length;
296			iter = ASN1_INTEGER_get(kdf->iter);
297			if (!PKCS5_PBKDF2_HMAC(pass, passlen, salt, saltlen, iter, prfmd,
298			keylen, key))
299			goto err;
300			rv = EVP_CipherInit_ex(ctx, NULL, NULL, key, NULL, en_de);
301
302			err:
303			explicit_bzero(key, keylen);
304			PBKDF2PARAM_free(kdf);
305			return rv;
306			}
307
308			#endif