1 /* p12_kiss.c */
2 /*
3 * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
4 * 1999.
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
14 * notice, this list of conditions and the following disclaimer.
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"
62 #include <openssl/pkcs12.h>
63
64 /* Simplified PKCS#12 routines */
65
66 static int parse_pk12(PKCS12 *p12, const char *pass, int passlen,
67 EVP_PKEY **pkey, STACK_OF(X509) *ocerts);
68
69 static int parse_bags(STACK_OF(PKCS12_SAFEBAG) *bags, const char *pass,
70 int passlen, EVP_PKEY **pkey, STACK_OF(X509) *ocerts);
71
72 static int parse_bag(PKCS12_SAFEBAG *bag, const char *pass, int passlen,
73 EVP_PKEY **pkey, STACK_OF(X509) *ocerts);
74
75 /*
76 * Parse and decrypt a PKCS#12 structure returning user key, user cert and
77 * other (CA) certs. Note either ca should be NULL, *ca should be NULL, or it
78 * should point to a valid STACK structure. pkey and cert can be passed
79 * unitialised.
80 */
81
PKCS12_parse(PKCS12 * p12,const char * pass,EVP_PKEY ** pkey,X509 ** cert,STACK_OF (X509)** ca)82 int PKCS12_parse(PKCS12 *p12, const char *pass, EVP_PKEY **pkey, X509 **cert,
83 STACK_OF(X509) **ca)
84 {
85 STACK_OF(X509) *ocerts = NULL;
86 X509 *x = NULL;
87 /* Check for NULL PKCS12 structure */
88
89 if (!p12) {
90 PKCS12err(PKCS12_F_PKCS12_PARSE,
91 PKCS12_R_INVALID_NULL_PKCS12_POINTER);
92 return 0;
93 }
94
95 if (pkey)
96 *pkey = NULL;
97 if (cert)
98 *cert = NULL;
99
100 /* Check the mac */
101
102 /*
103 * If password is zero length or NULL then try verifying both cases to
104 * determine which password is correct. The reason for this is that under
105 * PKCS#12 password based encryption no password and a zero length
106 * password are two different things...
107 */
108
109 if (!pass || !*pass) {
110 if (PKCS12_verify_mac(p12, NULL, 0))
111 pass = NULL;
112 else if (PKCS12_verify_mac(p12, "", 0))
113 pass = "";
114 else {
115 PKCS12err(PKCS12_F_PKCS12_PARSE, PKCS12_R_MAC_VERIFY_FAILURE);
116 goto err;
117 }
118 } else if (!PKCS12_verify_mac(p12, pass, -1)) {
119 PKCS12err(PKCS12_F_PKCS12_PARSE, PKCS12_R_MAC_VERIFY_FAILURE);
120 goto err;
121 }
122
123 /* Allocate stack for other certificates */
124 ocerts = sk_X509_new_null();
125
126 if (!ocerts) {
127 PKCS12err(PKCS12_F_PKCS12_PARSE, ERR_R_MALLOC_FAILURE);
128 return 0;
129 }
130
131 if (!parse_pk12(p12, pass, -1, pkey, ocerts)) {
132 PKCS12err(PKCS12_F_PKCS12_PARSE, PKCS12_R_PARSE_ERROR);
133 goto err;
134 }
135
136 while ((x = sk_X509_pop(ocerts))) {
137 if (pkey && *pkey && cert && !*cert) {
138 ERR_set_mark();
139 if (X509_check_private_key(x, *pkey)) {
140 *cert = x;
141 x = NULL;
142 }
143 ERR_pop_to_mark();
144 }
145
146 if (ca && x) {
147 if (!*ca)
148 *ca = sk_X509_new_null();
149 if (!*ca)
150 goto err;
151 if (!sk_X509_push(*ca, x))
152 goto err;
153 x = NULL;
154 }
155 if (x)
156 X509_free(x);
157 }
158
159 if (ocerts)
160 sk_X509_pop_free(ocerts, X509_free);
161
162 return 1;
163
164 err:
165
166 if (pkey && *pkey)
167 EVP_PKEY_free(*pkey);
168 if (cert && *cert)
169 X509_free(*cert);
170 if (x)
171 X509_free(x);
172 if (ocerts)
173 sk_X509_pop_free(ocerts, X509_free);
174 return 0;
175
176 }
177
178 /* Parse the outer PKCS#12 structure */
179
parse_pk12(PKCS12 * p12,const char * pass,int passlen,EVP_PKEY ** pkey,STACK_OF (X509)* ocerts)180 static int parse_pk12(PKCS12 *p12, const char *pass, int passlen,
181 EVP_PKEY **pkey, STACK_OF(X509) *ocerts)
182 {
183 STACK_OF(PKCS7) *asafes;
184 STACK_OF(PKCS12_SAFEBAG) *bags;
185 int i, bagnid;
186 PKCS7 *p7;
187
188 if (!(asafes = PKCS12_unpack_authsafes(p12)))
189 return 0;
190 for (i = 0; i < sk_PKCS7_num(asafes); i++) {
191 p7 = sk_PKCS7_value(asafes, i);
192 bagnid = OBJ_obj2nid(p7->type);
193 if (bagnid == NID_pkcs7_data) {
194 bags = PKCS12_unpack_p7data(p7);
195 } else if (bagnid == NID_pkcs7_encrypted) {
196 bags = PKCS12_unpack_p7encdata(p7, pass, passlen);
197 } else
198 continue;
199 if (!bags) {
200 sk_PKCS7_pop_free(asafes, PKCS7_free);
201 return 0;
202 }
203 if (!parse_bags(bags, pass, passlen, pkey, ocerts)) {
204 sk_PKCS12_SAFEBAG_pop_free(bags, PKCS12_SAFEBAG_free);
205 sk_PKCS7_pop_free(asafes, PKCS7_free);
206 return 0;
207 }
208 sk_PKCS12_SAFEBAG_pop_free(bags, PKCS12_SAFEBAG_free);
209 }
210 sk_PKCS7_pop_free(asafes, PKCS7_free);
211 return 1;
212 }
213
parse_bags(STACK_OF (PKCS12_SAFEBAG)* bags,const char * pass,int passlen,EVP_PKEY ** pkey,STACK_OF (X509)* ocerts)214 static int parse_bags(STACK_OF(PKCS12_SAFEBAG) *bags, const char *pass,
215 int passlen, EVP_PKEY **pkey, STACK_OF(X509) *ocerts)
216 {
217 int i;
218 for (i = 0; i < sk_PKCS12_SAFEBAG_num(bags); i++) {
219 if (!parse_bag(sk_PKCS12_SAFEBAG_value(bags, i),
220 pass, passlen, pkey, ocerts))
221 return 0;
222 }
223 return 1;
224 }
225
parse_bag(PKCS12_SAFEBAG * bag,const char * pass,int passlen,EVP_PKEY ** pkey,STACK_OF (X509)* ocerts)226 static int parse_bag(PKCS12_SAFEBAG *bag, const char *pass, int passlen,
227 EVP_PKEY **pkey, STACK_OF(X509) *ocerts)
228 {
229 PKCS8_PRIV_KEY_INFO *p8;
230 X509 *x509;
231 ASN1_TYPE *attrib;
232 ASN1_BMPSTRING *fname = NULL;
233 ASN1_OCTET_STRING *lkid = NULL;
234
235 if ((attrib = PKCS12_get_attr(bag, NID_friendlyName)))
236 fname = attrib->value.bmpstring;
237
238 if ((attrib = PKCS12_get_attr(bag, NID_localKeyID)))
239 lkid = attrib->value.octet_string;
240
241 switch (M_PKCS12_bag_type(bag)) {
242 case NID_keyBag:
243 if (!pkey || *pkey)
244 return 1;
245 if (!(*pkey = EVP_PKCS82PKEY(bag->value.keybag)))
246 return 0;
247 break;
248
249 case NID_pkcs8ShroudedKeyBag:
250 if (!pkey || *pkey)
251 return 1;
252 if (!(p8 = PKCS12_decrypt_skey(bag, pass, passlen)))
253 return 0;
254 *pkey = EVP_PKCS82PKEY(p8);
255 PKCS8_PRIV_KEY_INFO_free(p8);
256 if (!(*pkey))
257 return 0;
258 break;
259
260 case NID_certBag:
261 if (M_PKCS12_cert_bag_type(bag) != NID_x509Certificate)
262 return 1;
263 if (!(x509 = PKCS12_certbag2x509(bag)))
264 return 0;
265 if (lkid && !X509_keyid_set1(x509, lkid->data, lkid->length)) {
266 X509_free(x509);
267 return 0;
268 }
269 if (fname) {
270 int len, r;
271 unsigned char *data;
272 len = ASN1_STRING_to_UTF8(&data, fname);
273 if (len >= 0) {
274 r = X509_alias_set1(x509, data, len);
275 OPENSSL_free(data);
276 if (!r) {
277 X509_free(x509);
278 return 0;
279 }
280 }
281 }
282
283 if (!sk_X509_push(ocerts, x509)) {
284 X509_free(x509);
285 return 0;
286 }
287
288 break;
289
290 case NID_safeContentsBag:
291 return parse_bags(bag->value.safes, pass, passlen, pkey, ocerts);
292 break;
293
294 default:
295 return 1;
296 break;
297 }
298 return 1;
299 }
300