3 * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
6 /* ====================================================================
7 * Copyright (c) 1999 The OpenSSL Project. All rights reserved.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
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
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/)"
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.
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.
35 * 6. Redistributions of any form whatsoever must retain the following
37 * "This product includes software developed by the OpenSSL Project
38 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
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 * ====================================================================
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).
61 #include "internal/cryptlib.h"
62 #include <openssl/asn1t.h>
63 #include <openssl/x509.h>
64 #include <openssl/rand.h>
66 /* PKCS#5 v2.0 password based encryption structures */
68 ASN1_SEQUENCE(PBE2PARAM) = {
69 ASN1_SIMPLE(PBE2PARAM, keyfunc, X509_ALGOR),
70 ASN1_SIMPLE(PBE2PARAM, encryption, X509_ALGOR)
71 } ASN1_SEQUENCE_END(PBE2PARAM)
73 IMPLEMENT_ASN1_FUNCTIONS(PBE2PARAM)
75 ASN1_SEQUENCE(PBKDF2PARAM) = {
76 ASN1_SIMPLE(PBKDF2PARAM, salt, ASN1_ANY),
77 ASN1_SIMPLE(PBKDF2PARAM, iter, ASN1_INTEGER),
78 ASN1_OPT(PBKDF2PARAM, keylength, ASN1_INTEGER),
79 ASN1_OPT(PBKDF2PARAM, prf, X509_ALGOR)
80 } ASN1_SEQUENCE_END(PBKDF2PARAM)
82 IMPLEMENT_ASN1_FUNCTIONS(PBKDF2PARAM)
85 * Return an algorithm identifier for a PKCS#5 v2.0 PBE algorithm: yes I know
86 * this is horrible! Extended version to allow application supplied PRF NID
90 X509_ALGOR *PKCS5_pbe2_set_iv(const EVP_CIPHER *cipher, int iter,
91 unsigned char *salt, int saltlen,
92 unsigned char *aiv, int prf_nid)
94 X509_ALGOR *scheme = NULL, *kalg = NULL, *ret = NULL;
96 EVP_CIPHER_CTX *ctx = NULL;
97 unsigned char iv[EVP_MAX_IV_LENGTH];
98 PBE2PARAM *pbe2 = NULL;
101 alg_nid = EVP_CIPHER_type(cipher);
102 if (alg_nid == NID_undef) {
103 ASN1err(ASN1_F_PKCS5_PBE2_SET_IV,
104 ASN1_R_CIPHER_HAS_NO_OBJECT_IDENTIFIER);
107 obj = OBJ_nid2obj(alg_nid);
109 if ((pbe2 = PBE2PARAM_new()) == NULL)
112 /* Setup the AlgorithmIdentifier for the encryption scheme */
113 scheme = pbe2->encryption;
114 scheme->algorithm = obj;
115 if ((scheme->parameter = ASN1_TYPE_new()) == NULL)
118 /* Create random IV */
119 if (EVP_CIPHER_iv_length(cipher)) {
121 memcpy(iv, aiv, EVP_CIPHER_iv_length(cipher));
122 else if (RAND_bytes(iv, EVP_CIPHER_iv_length(cipher)) <= 0)
126 ctx = EVP_CIPHER_CTX_new();
130 /* Dummy cipherinit to just setup the IV, and PRF */
131 if (!EVP_CipherInit_ex(ctx, cipher, NULL, NULL, iv, 0))
133 if (EVP_CIPHER_param_to_asn1(ctx, scheme->parameter) < 0) {
134 ASN1err(ASN1_F_PKCS5_PBE2_SET_IV, ASN1_R_ERROR_SETTING_CIPHER_PARAMS);
138 * If prf NID unspecified see if cipher has a preference. An error is OK
139 * here: just means use default PRF.
141 if ((prf_nid == -1) &&
142 EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_PBE_PRF_NID, 0, &prf_nid) <= 0) {
144 prf_nid = NID_hmacWithSHA1;
146 EVP_CIPHER_CTX_free(ctx);
149 /* If its RC2 then we'd better setup the key length */
151 if (alg_nid == NID_rc2_cbc)
152 keylen = EVP_CIPHER_key_length(cipher);
158 X509_ALGOR_free(pbe2->keyfunc);
160 pbe2->keyfunc = PKCS5_pbkdf2_set(iter, salt, saltlen, prf_nid, keylen);
165 /* Now set up top level AlgorithmIdentifier */
167 if ((ret = X509_ALGOR_new()) == NULL)
170 ret->algorithm = OBJ_nid2obj(NID_pbes2);
172 /* Encode PBE2PARAM into parameter */
174 if (!ASN1_TYPE_pack_sequence(ASN1_ITEM_rptr(PBE2PARAM), pbe2,
178 PBE2PARAM_free(pbe2);
184 ASN1err(ASN1_F_PKCS5_PBE2_SET_IV, ERR_R_MALLOC_FAILURE);
187 EVP_CIPHER_CTX_free(ctx);
188 PBE2PARAM_free(pbe2);
189 /* Note 'scheme' is freed as part of pbe2 */
190 X509_ALGOR_free(kalg);
191 X509_ALGOR_free(ret);
197 X509_ALGOR *PKCS5_pbe2_set(const EVP_CIPHER *cipher, int iter,
198 unsigned char *salt, int saltlen)
200 return PKCS5_pbe2_set_iv(cipher, iter, salt, saltlen, NULL, -1);
203 X509_ALGOR *PKCS5_pbkdf2_set(int iter, unsigned char *salt, int saltlen,
204 int prf_nid, int keylen)
206 X509_ALGOR *keyfunc = NULL;
207 PBKDF2PARAM *kdf = NULL;
208 ASN1_OCTET_STRING *osalt = NULL;
210 if ((kdf = PBKDF2PARAM_new()) == NULL)
212 if ((osalt = ASN1_OCTET_STRING_new()) == NULL)
215 kdf->salt->value.octet_string = osalt;
216 kdf->salt->type = V_ASN1_OCTET_STRING;
219 saltlen = PKCS5_SALT_LEN;
220 if ((osalt->data = OPENSSL_malloc(saltlen)) == NULL)
223 osalt->length = saltlen;
226 memcpy(osalt->data, salt, saltlen);
227 else if (RAND_bytes(osalt->data, saltlen) <= 0)
231 iter = PKCS5_DEFAULT_ITER;
233 if (!ASN1_INTEGER_set(kdf->iter, iter))
236 /* If have a key len set it up */
239 if ((kdf->keylength = ASN1_INTEGER_new()) == NULL)
241 if (!ASN1_INTEGER_set(kdf->keylength, keylen))
245 /* prf can stay NULL if we are using hmacWithSHA1 */
246 if (prf_nid > 0 && prf_nid != NID_hmacWithSHA1) {
247 kdf->prf = X509_ALGOR_new();
248 if (kdf->prf == NULL)
250 X509_ALGOR_set0(kdf->prf, OBJ_nid2obj(prf_nid), V_ASN1_NULL, NULL);
253 /* Finally setup the keyfunc structure */
255 keyfunc = X509_ALGOR_new();
259 keyfunc->algorithm = OBJ_nid2obj(NID_id_pbkdf2);
261 /* Encode PBKDF2PARAM into parameter of pbe2 */
263 if (!ASN1_TYPE_pack_sequence(ASN1_ITEM_rptr(PBKDF2PARAM), kdf,
264 &keyfunc->parameter))
267 PBKDF2PARAM_free(kdf);
271 ASN1err(ASN1_F_PKCS5_PBKDF2_SET, ERR_R_MALLOC_FAILURE);
272 PBKDF2PARAM_free(kdf);
273 X509_ALGOR_free(keyfunc);