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d2e26dcc | 1 | /* p5_pbev2.c */ |
0f113f3e MC |
2 | /* |
3 | * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project | |
4 | * 1999-2004. | |
d2e26dcc 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 | |
0f113f3e | 14 | * notice, this list of conditions and the following disclaimer. |
d2e26dcc 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 | ||
60 | #include <stdio.h> | |
61 | #include "cryptlib.h" | |
9d6b1ce6 | 62 | #include <openssl/asn1t.h> |
f0e8ae72 | 63 | #include <openssl/x509.h> |
ec577822 | 64 | #include <openssl/rand.h> |
d2e26dcc DSH |
65 | |
66 | /* PKCS#5 v2.0 password based encryption structures */ | |
67 | ||
9d6b1ce6 | 68 | ASN1_SEQUENCE(PBE2PARAM) = { |
0f113f3e MC |
69 | ASN1_SIMPLE(PBE2PARAM, keyfunc, X509_ALGOR), |
70 | ASN1_SIMPLE(PBE2PARAM, encryption, X509_ALGOR) | |
d339187b | 71 | } ASN1_SEQUENCE_END(PBE2PARAM) |
d2e26dcc | 72 | |
9d6b1ce6 | 73 | IMPLEMENT_ASN1_FUNCTIONS(PBE2PARAM) |
d2e26dcc | 74 | |
9d6b1ce6 | 75 | ASN1_SEQUENCE(PBKDF2PARAM) = { |
0f113f3e MC |
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) | |
d339187b | 80 | } ASN1_SEQUENCE_END(PBKDF2PARAM) |
d2e26dcc | 81 | |
9d6b1ce6 | 82 | IMPLEMENT_ASN1_FUNCTIONS(PBKDF2PARAM) |
d2e26dcc | 83 | |
0f113f3e MC |
84 | /* |
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 | |
87 | * and IV. | |
8e21c146 DSH |
88 | */ |
89 | ||
ae519a24 | 90 | X509_ALGOR *PKCS5_pbe2_set_iv(const EVP_CIPHER *cipher, int iter, |
0f113f3e MC |
91 | unsigned char *salt, int saltlen, |
92 | unsigned char *aiv, int prf_nid) | |
8e21c146 | 93 | { |
0f113f3e MC |
94 | X509_ALGOR *scheme = NULL, *kalg = NULL, *ret = NULL; |
95 | int alg_nid, keylen; | |
96 | EVP_CIPHER_CTX ctx; | |
97 | unsigned char iv[EVP_MAX_IV_LENGTH]; | |
98 | PBE2PARAM *pbe2 = NULL; | |
99 | ASN1_OBJECT *obj; | |
100 | ||
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); | |
105 | goto err; | |
106 | } | |
107 | obj = OBJ_nid2obj(alg_nid); | |
108 | ||
109 | if (!(pbe2 = PBE2PARAM_new())) | |
110 | goto merr; | |
111 | ||
112 | /* Setup the AlgorithmIdentifier for the encryption scheme */ | |
113 | scheme = pbe2->encryption; | |
114 | ||
115 | scheme->algorithm = obj; | |
116 | if (!(scheme->parameter = ASN1_TYPE_new())) | |
117 | goto merr; | |
118 | ||
119 | /* Create random IV */ | |
120 | if (EVP_CIPHER_iv_length(cipher)) { | |
121 | if (aiv) | |
122 | memcpy(iv, aiv, EVP_CIPHER_iv_length(cipher)); | |
266483d2 | 123 | else if (RAND_bytes(iv, EVP_CIPHER_iv_length(cipher)) <= 0) |
0f113f3e MC |
124 | goto err; |
125 | } | |
126 | ||
127 | EVP_CIPHER_CTX_init(&ctx); | |
128 | ||
129 | /* Dummy cipherinit to just setup the IV, and PRF */ | |
130 | if (!EVP_CipherInit_ex(&ctx, cipher, NULL, NULL, iv, 0)) | |
131 | goto err; | |
132 | if (EVP_CIPHER_param_to_asn1(&ctx, scheme->parameter) < 0) { | |
133 | ASN1err(ASN1_F_PKCS5_PBE2_SET_IV, ASN1_R_ERROR_SETTING_CIPHER_PARAMS); | |
134 | EVP_CIPHER_CTX_cleanup(&ctx); | |
135 | goto err; | |
136 | } | |
137 | /* | |
138 | * If prf NID unspecified see if cipher has a preference. An error is OK | |
139 | * here: just means use default PRF. | |
140 | */ | |
141 | if ((prf_nid == -1) && | |
142 | EVP_CIPHER_CTX_ctrl(&ctx, EVP_CTRL_PBE_PRF_NID, 0, &prf_nid) <= 0) { | |
143 | ERR_clear_error(); | |
144 | prf_nid = NID_hmacWithSHA1; | |
145 | } | |
146 | EVP_CIPHER_CTX_cleanup(&ctx); | |
147 | ||
148 | /* If its RC2 then we'd better setup the key length */ | |
149 | ||
150 | if (alg_nid == NID_rc2_cbc) | |
151 | keylen = EVP_CIPHER_key_length(cipher); | |
152 | else | |
153 | keylen = -1; | |
154 | ||
155 | /* Setup keyfunc */ | |
156 | ||
157 | X509_ALGOR_free(pbe2->keyfunc); | |
158 | ||
159 | pbe2->keyfunc = PKCS5_pbkdf2_set(iter, salt, saltlen, prf_nid, keylen); | |
160 | ||
161 | if (!pbe2->keyfunc) | |
162 | goto merr; | |
163 | ||
164 | /* Now set up top level AlgorithmIdentifier */ | |
165 | ||
166 | if (!(ret = X509_ALGOR_new())) | |
167 | goto merr; | |
168 | if (!(ret->parameter = ASN1_TYPE_new())) | |
169 | goto merr; | |
170 | ||
171 | ret->algorithm = OBJ_nid2obj(NID_pbes2); | |
172 | ||
173 | /* Encode PBE2PARAM into parameter */ | |
174 | ||
175 | if (!ASN1_item_pack(pbe2, ASN1_ITEM_rptr(PBE2PARAM), | |
176 | &ret->parameter->value.sequence)) | |
177 | goto merr; | |
178 | ret->parameter->type = V_ASN1_SEQUENCE; | |
179 | ||
180 | PBE2PARAM_free(pbe2); | |
181 | pbe2 = NULL; | |
182 | ||
183 | return ret; | |
184 | ||
185 | merr: | |
186 | ASN1err(ASN1_F_PKCS5_PBE2_SET_IV, ERR_R_MALLOC_FAILURE); | |
187 | ||
188 | err: | |
189 | PBE2PARAM_free(pbe2); | |
190 | /* Note 'scheme' is freed as part of pbe2 */ | |
191 | X509_ALGOR_free(kalg); | |
192 | X509_ALGOR_free(ret); | |
193 | ||
194 | return NULL; | |
8e21c146 | 195 | |
0f113f3e | 196 | } |
8e21c146 | 197 | |
0f113f3e MC |
198 | X509_ALGOR *PKCS5_pbe2_set(const EVP_CIPHER *cipher, int iter, |
199 | unsigned char *salt, int saltlen) | |
200 | { | |
201 | return PKCS5_pbe2_set_iv(cipher, iter, salt, saltlen, NULL, -1); | |
202 | } | |
8e21c146 | 203 | |
0f113f3e MC |
204 | X509_ALGOR *PKCS5_pbkdf2_set(int iter, unsigned char *salt, int saltlen, |
205 | int prf_nid, int keylen) | |
206 | { | |
207 | X509_ALGOR *keyfunc = NULL; | |
208 | PBKDF2PARAM *kdf = NULL; | |
209 | ASN1_OCTET_STRING *osalt = NULL; | |
0fccb00b | 210 | |
0f113f3e MC |
211 | if (!(kdf = PBKDF2PARAM_new())) |
212 | goto merr; | |
f422a514 | 213 | if (!(osalt = ASN1_OCTET_STRING_new())) |
0f113f3e | 214 | goto merr; |
8e21c146 | 215 | |
0f113f3e MC |
216 | kdf->salt->value.octet_string = osalt; |
217 | kdf->salt->type = V_ASN1_OCTET_STRING; | |
8e21c146 | 218 | |
0f113f3e MC |
219 | if (!saltlen) |
220 | saltlen = PKCS5_SALT_LEN; | |
221 | if (!(osalt->data = OPENSSL_malloc(saltlen))) | |
222 | goto merr; | |
8e21c146 | 223 | |
0f113f3e | 224 | osalt->length = saltlen; |
8e21c146 | 225 | |
0f113f3e MC |
226 | if (salt) |
227 | memcpy(osalt->data, salt, saltlen); | |
266483d2 | 228 | else if (RAND_bytes(osalt->data, saltlen) <= 0) |
0f113f3e | 229 | goto merr; |
f9678b8b | 230 | |
0f113f3e MC |
231 | if (iter <= 0) |
232 | iter = PKCS5_DEFAULT_ITER; | |
8e21c146 | 233 | |
0f113f3e MC |
234 | if (!ASN1_INTEGER_set(kdf->iter, iter)) |
235 | goto merr; | |
8e21c146 | 236 | |
0f113f3e | 237 | /* If have a key len set it up */ |
8e21c146 | 238 | |
0f113f3e | 239 | if (keylen > 0) { |
f422a514 | 240 | if (!(kdf->keylength = ASN1_INTEGER_new())) |
0f113f3e MC |
241 | goto merr; |
242 | if (!ASN1_INTEGER_set(kdf->keylength, keylen)) | |
243 | goto merr; | |
244 | } | |
8e21c146 | 245 | |
0f113f3e MC |
246 | /* prf can stay NULL if we are using hmacWithSHA1 */ |
247 | if (prf_nid > 0 && prf_nid != NID_hmacWithSHA1) { | |
248 | kdf->prf = X509_ALGOR_new(); | |
249 | if (!kdf->prf) | |
250 | goto merr; | |
251 | X509_ALGOR_set0(kdf->prf, OBJ_nid2obj(prf_nid), V_ASN1_NULL, NULL); | |
252 | } | |
8e21c146 | 253 | |
0f113f3e | 254 | /* Finally setup the keyfunc structure */ |
8e21c146 | 255 | |
0f113f3e MC |
256 | keyfunc = X509_ALGOR_new(); |
257 | if (!keyfunc) | |
258 | goto merr; | |
8e21c146 | 259 | |
0f113f3e | 260 | keyfunc->algorithm = OBJ_nid2obj(NID_id_pbkdf2); |
8e21c146 | 261 | |
0f113f3e | 262 | /* Encode PBKDF2PARAM into parameter of pbe2 */ |
8e21c146 | 263 | |
0f113f3e MC |
264 | if (!(keyfunc->parameter = ASN1_TYPE_new())) |
265 | goto merr; | |
8e21c146 | 266 | |
0f113f3e MC |
267 | if (!ASN1_item_pack(kdf, ASN1_ITEM_rptr(PBKDF2PARAM), |
268 | &keyfunc->parameter->value.sequence)) | |
269 | goto merr; | |
270 | keyfunc->parameter->type = V_ASN1_SEQUENCE; | |
8e21c146 | 271 | |
0f113f3e MC |
272 | PBKDF2PARAM_free(kdf); |
273 | return keyfunc; | |
8e21c146 | 274 | |
0f113f3e MC |
275 | merr: |
276 | ASN1err(ASN1_F_PKCS5_PBKDF2_SET, ERR_R_MALLOC_FAILURE); | |
277 | PBKDF2PARAM_free(kdf); | |
278 | X509_ALGOR_free(keyfunc); | |
279 | return NULL; | |
8e21c146 | 280 | } |