Branch data Line data Source code
1 : : /* p5_pbev2.c */
2 : : /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
3 : : * project 1999-2004.
4 : : */
5 : : /* ====================================================================
6 : : * Copyright (c) 1999 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 "cryptlib.h"
61 : : #include <openssl/asn1t.h>
62 : : #include <openssl/x509.h>
63 : : #include <openssl/rand.h>
64 : :
65 : : /* PKCS#5 v2.0 password based encryption structures */
66 : :
67 : : ASN1_SEQUENCE(PBE2PARAM) = {
68 : : ASN1_SIMPLE(PBE2PARAM, keyfunc, X509_ALGOR),
69 : : ASN1_SIMPLE(PBE2PARAM, encryption, X509_ALGOR)
70 : : } ASN1_SEQUENCE_END(PBE2PARAM)
71 : :
72 : 0 : IMPLEMENT_ASN1_FUNCTIONS(PBE2PARAM)
73 : :
74 : : ASN1_SEQUENCE(PBKDF2PARAM) = {
75 : : ASN1_SIMPLE(PBKDF2PARAM, salt, ASN1_ANY),
76 : : ASN1_SIMPLE(PBKDF2PARAM, iter, ASN1_INTEGER),
77 : : ASN1_OPT(PBKDF2PARAM, keylength, ASN1_INTEGER),
78 : : ASN1_OPT(PBKDF2PARAM, prf, X509_ALGOR)
79 : : } ASN1_SEQUENCE_END(PBKDF2PARAM)
80 : :
81 : 0 : IMPLEMENT_ASN1_FUNCTIONS(PBKDF2PARAM)
82 : :
83 : : /* Return an algorithm identifier for a PKCS#5 v2.0 PBE algorithm:
84 : : * yes I know this is horrible!
85 : : *
86 : : * Extended version to allow application supplied PRF NID and IV.
87 : : */
88 : :
89 : 0 : X509_ALGOR *PKCS5_pbe2_set_iv(const EVP_CIPHER *cipher, int iter,
90 : : unsigned char *salt, int saltlen,
91 : : unsigned char *aiv, int prf_nid)
92 : : {
93 : 0 : X509_ALGOR *scheme = NULL, *kalg = NULL, *ret = NULL;
94 : : int alg_nid, keylen;
95 : : EVP_CIPHER_CTX ctx;
96 : : unsigned char iv[EVP_MAX_IV_LENGTH];
97 : 0 : PBE2PARAM *pbe2 = NULL;
98 : : ASN1_OBJECT *obj;
99 : :
100 : 0 : alg_nid = EVP_CIPHER_type(cipher);
101 [ # # ]: 0 : if(alg_nid == NID_undef) {
102 : 0 : ASN1err(ASN1_F_PKCS5_PBE2_SET_IV,
103 : : ASN1_R_CIPHER_HAS_NO_OBJECT_IDENTIFIER);
104 : 0 : goto err;
105 : : }
106 : 0 : obj = OBJ_nid2obj(alg_nid);
107 : :
108 [ # # ]: 0 : if(!(pbe2 = PBE2PARAM_new())) goto merr;
109 : :
110 : : /* Setup the AlgorithmIdentifier for the encryption scheme */
111 : 0 : scheme = pbe2->encryption;
112 : :
113 : 0 : scheme->algorithm = obj;
114 [ # # ]: 0 : if(!(scheme->parameter = ASN1_TYPE_new())) goto merr;
115 : :
116 : : /* Create random IV */
117 [ # # ]: 0 : if (EVP_CIPHER_iv_length(cipher))
118 : : {
119 [ # # ]: 0 : if (aiv)
120 : 0 : memcpy(iv, aiv, EVP_CIPHER_iv_length(cipher));
121 [ # # ]: 0 : else if (RAND_pseudo_bytes(iv, EVP_CIPHER_iv_length(cipher)) < 0)
122 : : goto err;
123 : : }
124 : :
125 : 0 : EVP_CIPHER_CTX_init(&ctx);
126 : :
127 : : /* Dummy cipherinit to just setup the IV, and PRF */
128 [ # # ]: 0 : if (!EVP_CipherInit_ex(&ctx, cipher, NULL, NULL, iv, 0))
129 : : goto err;
130 [ # # ]: 0 : if(EVP_CIPHER_param_to_asn1(&ctx, scheme->parameter) < 0) {
131 : 0 : ASN1err(ASN1_F_PKCS5_PBE2_SET_IV,
132 : : ASN1_R_ERROR_SETTING_CIPHER_PARAMS);
133 : 0 : EVP_CIPHER_CTX_cleanup(&ctx);
134 : 0 : goto err;
135 : : }
136 : : /* If prf NID unspecified see if cipher has a preference.
137 : : * An error is OK here: just means use default PRF.
138 : : */
139 [ # # # # ]: 0 : if ((prf_nid == -1) &&
140 : 0 : EVP_CIPHER_CTX_ctrl(&ctx, EVP_CTRL_PBE_PRF_NID, 0, &prf_nid) <= 0)
141 : : {
142 : 0 : ERR_clear_error();
143 : 0 : prf_nid = NID_hmacWithSHA1;
144 : : }
145 : 0 : EVP_CIPHER_CTX_cleanup(&ctx);
146 : :
147 : : /* If its RC2 then we'd better setup the key length */
148 : :
149 [ # # ]: 0 : if(alg_nid == NID_rc2_cbc)
150 : 0 : keylen = EVP_CIPHER_key_length(cipher);
151 : : else
152 : : keylen = -1;
153 : :
154 : : /* Setup keyfunc */
155 : :
156 : 0 : X509_ALGOR_free(pbe2->keyfunc);
157 : :
158 : 0 : pbe2->keyfunc = PKCS5_pbkdf2_set(iter, salt, saltlen, prf_nid, keylen);
159 : :
160 [ # # ]: 0 : if (!pbe2->keyfunc)
161 : : goto merr;
162 : :
163 : : /* Now set up top level AlgorithmIdentifier */
164 : :
165 [ # # ]: 0 : if(!(ret = X509_ALGOR_new())) goto merr;
166 [ # # ]: 0 : if(!(ret->parameter = ASN1_TYPE_new())) goto merr;
167 : :
168 : 0 : ret->algorithm = OBJ_nid2obj(NID_pbes2);
169 : :
170 : : /* Encode PBE2PARAM into parameter */
171 : :
172 [ # # ]: 0 : if(!ASN1_item_pack(pbe2, ASN1_ITEM_rptr(PBE2PARAM),
173 : 0 : &ret->parameter->value.sequence)) goto merr;
174 : 0 : ret->parameter->type = V_ASN1_SEQUENCE;
175 : :
176 : 0 : PBE2PARAM_free(pbe2);
177 : 0 : pbe2 = NULL;
178 : :
179 : 0 : return ret;
180 : :
181 : : merr:
182 : 0 : ASN1err(ASN1_F_PKCS5_PBE2_SET_IV,ERR_R_MALLOC_FAILURE);
183 : :
184 : : err:
185 : 0 : PBE2PARAM_free(pbe2);
186 : : /* Note 'scheme' is freed as part of pbe2 */
187 : 0 : X509_ALGOR_free(kalg);
188 : 0 : X509_ALGOR_free(ret);
189 : :
190 : 0 : return NULL;
191 : :
192 : : }
193 : :
194 : 0 : X509_ALGOR *PKCS5_pbe2_set(const EVP_CIPHER *cipher, int iter,
195 : : unsigned char *salt, int saltlen)
196 : : {
197 : 0 : return PKCS5_pbe2_set_iv(cipher, iter, salt, saltlen, NULL, -1);
198 : : }
199 : :
200 : 0 : X509_ALGOR *PKCS5_pbkdf2_set(int iter, unsigned char *salt, int saltlen,
201 : : int prf_nid, int keylen)
202 : : {
203 : 0 : X509_ALGOR *keyfunc = NULL;
204 : 0 : PBKDF2PARAM *kdf = NULL;
205 : 0 : ASN1_OCTET_STRING *osalt = NULL;
206 : :
207 [ # # ]: 0 : if(!(kdf = PBKDF2PARAM_new()))
208 : : goto merr;
209 [ # # ]: 0 : if(!(osalt = M_ASN1_OCTET_STRING_new()))
210 : : goto merr;
211 : :
212 : 0 : kdf->salt->value.octet_string = osalt;
213 : 0 : kdf->salt->type = V_ASN1_OCTET_STRING;
214 : :
215 [ # # ]: 0 : if (!saltlen)
216 : 0 : saltlen = PKCS5_SALT_LEN;
217 [ # # ]: 0 : if (!(osalt->data = OPENSSL_malloc (saltlen)))
218 : : goto merr;
219 : :
220 : 0 : osalt->length = saltlen;
221 : :
222 [ # # ]: 0 : if (salt)
223 : 0 : memcpy (osalt->data, salt, saltlen);
224 [ # # ]: 0 : else if (RAND_pseudo_bytes (osalt->data, saltlen) < 0)
225 : : goto merr;
226 : :
227 [ # # ]: 0 : if(iter <= 0)
228 : 0 : iter = PKCS5_DEFAULT_ITER;
229 : :
230 [ # # ]: 0 : if(!ASN1_INTEGER_set(kdf->iter, iter))
231 : : goto merr;
232 : :
233 : : /* If have a key len set it up */
234 : :
235 [ # # ]: 0 : if(keylen > 0)
236 : : {
237 [ # # ]: 0 : if(!(kdf->keylength = M_ASN1_INTEGER_new()))
238 : : goto merr;
239 [ # # ]: 0 : if(!ASN1_INTEGER_set (kdf->keylength, keylen))
240 : : goto merr;
241 : : }
242 : :
243 : : /* prf can stay NULL if we are using hmacWithSHA1 */
244 [ # # ]: 0 : if (prf_nid > 0 && prf_nid != NID_hmacWithSHA1)
245 : : {
246 : 0 : kdf->prf = X509_ALGOR_new();
247 [ # # ]: 0 : if (!kdf->prf)
248 : : goto merr;
249 : 0 : X509_ALGOR_set0(kdf->prf, OBJ_nid2obj(prf_nid),
250 : : V_ASN1_NULL, NULL);
251 : : }
252 : :
253 : : /* Finally setup the keyfunc structure */
254 : :
255 : 0 : keyfunc = X509_ALGOR_new();
256 [ # # ]: 0 : if (!keyfunc)
257 : : goto merr;
258 : :
259 : 0 : keyfunc->algorithm = OBJ_nid2obj(NID_id_pbkdf2);
260 : :
261 : : /* Encode PBKDF2PARAM into parameter of pbe2 */
262 : :
263 [ # # ]: 0 : if(!(keyfunc->parameter = ASN1_TYPE_new()))
264 : : goto merr;
265 : :
266 [ # # ]: 0 : if(!ASN1_item_pack(kdf, ASN1_ITEM_rptr(PBKDF2PARAM),
267 : 0 : &keyfunc->parameter->value.sequence))
268 : : goto merr;
269 : 0 : keyfunc->parameter->type = V_ASN1_SEQUENCE;
270 : :
271 : 0 : PBKDF2PARAM_free(kdf);
272 : 0 : return keyfunc;
273 : :
274 : : merr:
275 : 0 : ASN1err(ASN1_F_PKCS5_PBKDF2_SET,ERR_R_MALLOC_FAILURE);
276 : 0 : PBKDF2PARAM_free(kdf);
277 : 0 : X509_ALGOR_free(keyfunc);
278 : 0 : return NULL;
279 : : }
280 : :
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