2 /* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
5 /* ====================================================================
6 * Copyright (c) 1999 The OpenSSL Project. All rights reserved.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
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
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/)"
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.
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.
34 * 6. Redistributions of any form whatsoever must retain the following
36 * "This product includes software developed by the OpenSSL Project
37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
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 * ====================================================================
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).
61 #include <openssl/asn1_mac.h>
62 #include <openssl/x509.h>
63 #include <openssl/rand.h>
65 /* PKCS#5 v2.0 password based encryption structures */
67 int i2d_PBE2PARAM(PBE2PARAM *a, unsigned char **pp)
70 M_ASN1_I2D_len (a->keyfunc, i2d_X509_ALGOR);
71 M_ASN1_I2D_len (a->encryption, i2d_X509_ALGOR);
73 M_ASN1_I2D_seq_total ();
75 M_ASN1_I2D_put (a->keyfunc, i2d_X509_ALGOR);
76 M_ASN1_I2D_put (a->encryption, i2d_X509_ALGOR);
81 PBE2PARAM *PBE2PARAM_new(void)
85 M_ASN1_New_Malloc(ret, PBE2PARAM);
86 M_ASN1_New(ret->keyfunc,X509_ALGOR_new);
87 M_ASN1_New(ret->encryption,X509_ALGOR_new);
89 M_ASN1_New_Error(ASN1_F_PBE2PARAM_NEW);
92 PBE2PARAM *d2i_PBE2PARAM(PBE2PARAM **a, unsigned char **pp, long length)
94 M_ASN1_D2I_vars(a,PBE2PARAM *,PBE2PARAM_new);
96 M_ASN1_D2I_start_sequence();
97 M_ASN1_D2I_get (ret->keyfunc, d2i_X509_ALGOR);
98 M_ASN1_D2I_get (ret->encryption, d2i_X509_ALGOR);
99 M_ASN1_D2I_Finish(a, PBE2PARAM_free, ASN1_F_D2I_PBE2PARAM);
102 void PBE2PARAM_free (PBE2PARAM *a)
105 X509_ALGOR_free(a->keyfunc);
106 X509_ALGOR_free(a->encryption);
110 int i2d_PBKDF2PARAM(PBKDF2PARAM *a, unsigned char **pp)
113 M_ASN1_I2D_len (a->salt, i2d_ASN1_TYPE);
114 M_ASN1_I2D_len (a->iter, i2d_ASN1_INTEGER);
115 M_ASN1_I2D_len (a->keylength, i2d_ASN1_INTEGER);
116 M_ASN1_I2D_len (a->prf, i2d_X509_ALGOR);
118 M_ASN1_I2D_seq_total ();
120 M_ASN1_I2D_put (a->salt, i2d_ASN1_TYPE);
121 M_ASN1_I2D_put (a->iter, i2d_ASN1_INTEGER);
122 M_ASN1_I2D_put (a->keylength, i2d_ASN1_INTEGER);
123 M_ASN1_I2D_put (a->prf, i2d_X509_ALGOR);
128 PBKDF2PARAM *PBKDF2PARAM_new(void)
130 PBKDF2PARAM *ret=NULL;
132 M_ASN1_New_Malloc(ret, PBKDF2PARAM);
133 M_ASN1_New(ret->salt, ASN1_TYPE_new);
134 M_ASN1_New(ret->iter, M_ASN1_INTEGER_new);
135 ret->keylength = NULL;
138 M_ASN1_New_Error(ASN1_F_PBKDF2PARAM_NEW);
141 PBKDF2PARAM *d2i_PBKDF2PARAM(PBKDF2PARAM **a, unsigned char **pp,
144 M_ASN1_D2I_vars(a,PBKDF2PARAM *,PBKDF2PARAM_new);
146 M_ASN1_D2I_start_sequence();
147 M_ASN1_D2I_get (ret->salt, d2i_ASN1_TYPE);
148 M_ASN1_D2I_get (ret->iter, d2i_ASN1_INTEGER);
149 M_ASN1_D2I_get_opt (ret->keylength, d2i_ASN1_INTEGER, V_ASN1_INTEGER);
150 M_ASN1_D2I_get_opt (ret->prf, d2i_X509_ALGOR, V_ASN1_SEQUENCE);
151 M_ASN1_D2I_Finish(a, PBKDF2PARAM_free, ASN1_F_D2I_PBKDF2PARAM);
154 void PBKDF2PARAM_free (PBKDF2PARAM *a)
157 ASN1_TYPE_free(a->salt);
158 M_ASN1_INTEGER_free(a->iter);
159 M_ASN1_INTEGER_free(a->keylength);
160 X509_ALGOR_free(a->prf);
164 /* Return an algorithm identifier for a PKCS#5 v2.0 PBE algorithm:
165 * yes I know this is horrible!
168 X509_ALGOR *PKCS5_pbe2_set(const EVP_CIPHER *cipher, int iter,
169 unsigned char *salt, int saltlen)
171 X509_ALGOR *scheme = NULL, *kalg = NULL, *ret = NULL;
174 unsigned char iv[EVP_MAX_IV_LENGTH];
175 PBKDF2PARAM *kdf = NULL;
176 PBE2PARAM *pbe2 = NULL;
177 ASN1_OCTET_STRING *osalt = NULL;
180 alg_nid = EVP_CIPHER_type(cipher);
181 if(alg_nid == NID_undef) {
182 ASN1err(ASN1_F_PKCS5_PBE2_SET,
183 ASN1_R_CIPHER_HAS_NO_OBJECT_IDENTIFIER);
186 obj = OBJ_nid2obj(alg_nid);
188 if(!(pbe2 = PBE2PARAM_new())) goto merr;
190 /* Setup the AlgorithmIdentifier for the encryption scheme */
191 scheme = pbe2->encryption;
193 scheme->algorithm = obj;
194 if(!(scheme->parameter = ASN1_TYPE_new())) goto merr;
196 /* Create random IV */
197 RAND_pseudo_bytes(iv, EVP_CIPHER_iv_length(cipher));
199 /* Dummy cipherinit to just setup the IV */
200 EVP_CipherInit(&ctx, cipher, NULL, iv, 0);
201 if(EVP_CIPHER_param_to_asn1(&ctx, scheme->parameter) < 0) {
202 ASN1err(ASN1_F_PKCS5_PBE2_SET,
203 ASN1_R_ERROR_SETTING_CIPHER_PARAMS);
206 EVP_CIPHER_CTX_cleanup(&ctx);
208 if(!(kdf = PBKDF2PARAM_new())) goto merr;
209 if(!(osalt = M_ASN1_OCTET_STRING_new())) goto merr;
211 if (!saltlen) saltlen = PKCS5_SALT_LEN;
212 if (!(osalt->data = Malloc (saltlen))) goto merr;
213 osalt->length = saltlen;
214 if (salt) memcpy (osalt->data, salt, saltlen);
215 else if (RAND_bytes (osalt->data, saltlen) <= 0) goto merr;
217 if(iter <= 0) iter = PKCS5_DEFAULT_ITER;
218 if(!ASN1_INTEGER_set(kdf->iter, iter)) goto merr;
220 /* Now include salt in kdf structure */
221 kdf->salt->value.octet_string = osalt;
222 kdf->salt->type = V_ASN1_OCTET_STRING;
225 /* If its RC2 then we'd better setup the key length */
227 if(alg_nid == NID_rc2_cbc) {
228 if(!(kdf->keylength = M_ASN1_INTEGER_new())) goto merr;
229 if(!ASN1_INTEGER_set (kdf->keylength,
230 EVP_CIPHER_key_length(cipher))) goto merr;
233 /* prf can stay NULL because we are using hmacWithSHA1 */
235 /* Now setup the PBE2PARAM keyfunc structure */
237 pbe2->keyfunc->algorithm = OBJ_nid2obj(NID_id_pbkdf2);
239 /* Encode PBKDF2PARAM into parameter of pbe2 */
241 if(!(pbe2->keyfunc->parameter = ASN1_TYPE_new())) goto merr;
243 if(!ASN1_pack_string(kdf, i2d_PBKDF2PARAM,
244 &pbe2->keyfunc->parameter->value.sequence)) goto merr;
245 pbe2->keyfunc->parameter->type = V_ASN1_SEQUENCE;
247 PBKDF2PARAM_free(kdf);
250 /* Now set up top level AlgorithmIdentifier */
252 if(!(ret = X509_ALGOR_new())) goto merr;
253 if(!(ret->parameter = ASN1_TYPE_new())) goto merr;
255 ret->algorithm = OBJ_nid2obj(NID_pbes2);
257 /* Encode PBE2PARAM into parameter */
259 if(!ASN1_pack_string(pbe2, i2d_PBE2PARAM,
260 &ret->parameter->value.sequence)) goto merr;
261 ret->parameter->type = V_ASN1_SEQUENCE;
263 PBE2PARAM_free(pbe2);
269 ASN1err(ASN1_F_PKCS5_PBE2_SET,ERR_R_MALLOC_FAILURE);
272 PBE2PARAM_free(pbe2);
273 /* Note 'scheme' is freed as part of pbe2 */
274 M_ASN1_OCTET_STRING_free(osalt);
275 PBKDF2PARAM_free(kdf);
276 X509_ALGOR_free(kalg);
277 X509_ALGOR_free(ret);