1 /*
2 * Copyright 2004-2024 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the Apache License 2.0 (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
8 */
9
10 /*
11 * This file is dual-licensed and is also available under the following
12 * terms:
13 *
14 * Copyright (c) 2004 Kungliga Tekniska Högskolan
15 * (Royal Institute of Technology, Stockholm, Sweden).
16 * All rights reserved.
17 *
18 * Redistribution and use in source and binary forms, with or without
19 * modification, are permitted provided that the following conditions
20 * are met:
21 *
22 * 1. Redistributions of source code must retain the above copyright
23 * notice, this list of conditions and the following disclaimer.
24 *
25 * 2. Redistributions in binary form must reproduce the above copyright
26 * notice, this list of conditions and the following disclaimer in the
27 * documentation and/or other materials provided with the distribution.
28 *
29 * 3. Neither the name of the Institute nor the names of its contributors
30 * may be used to endorse or promote products derived from this software
31 * without specific prior written permission.
32 *
33 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
34 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
35 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
36 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
37 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
38 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
39 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
40 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
41 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
42 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
43 * SUCH DAMAGE.
44 */
45
46 #include <stdio.h>
47 #include "internal/cryptlib.h"
48 #include <openssl/conf.h>
49 #include <openssl/x509v3.h>
50 #include "ext_dat.h"
51
52 static int i2r_pci(X509V3_EXT_METHOD *method, PROXY_CERT_INFO_EXTENSION *ext,
53 BIO *out, int indent);
54 static PROXY_CERT_INFO_EXTENSION *r2i_pci(X509V3_EXT_METHOD *method,
55 X509V3_CTX *ctx, char *str);
56
57 const X509V3_EXT_METHOD ossl_v3_pci = {
58 NID_proxyCertInfo, 0, ASN1_ITEM_ref(PROXY_CERT_INFO_EXTENSION),
59 0, 0, 0, 0,
60 0, 0,
61 NULL, NULL,
62 (X509V3_EXT_I2R)i2r_pci,
63 (X509V3_EXT_R2I)r2i_pci,
64 NULL,
65 };
66
i2r_pci(X509V3_EXT_METHOD * method,PROXY_CERT_INFO_EXTENSION * pci,BIO * out,int indent)67 static int i2r_pci(X509V3_EXT_METHOD *method, PROXY_CERT_INFO_EXTENSION *pci,
68 BIO *out, int indent)
69 {
70 BIO_printf(out, "%*sPath Length Constraint: ", indent, "");
71 if (pci->pcPathLengthConstraint)
72 i2a_ASN1_INTEGER(out, pci->pcPathLengthConstraint);
73 else
74 BIO_printf(out, "infinite");
75 BIO_puts(out, "\n");
76 BIO_printf(out, "%*sPolicy Language: ", indent, "");
77 i2a_ASN1_OBJECT(out, pci->proxyPolicy->policyLanguage);
78 if (pci->proxyPolicy->policy && pci->proxyPolicy->policy->data)
79 BIO_printf(out, "\n%*sPolicy Text: %.*s", indent, "",
80 pci->proxyPolicy->policy->length,
81 pci->proxyPolicy->policy->data);
82 return 1;
83 }
84
process_pci_value(CONF_VALUE * val,ASN1_OBJECT ** language,ASN1_INTEGER ** pathlen,ASN1_OCTET_STRING ** policy)85 static int process_pci_value(CONF_VALUE *val,
86 ASN1_OBJECT **language, ASN1_INTEGER **pathlen,
87 ASN1_OCTET_STRING **policy)
88 {
89 int free_policy = 0;
90
91 if (strcmp(val->name, "language") == 0) {
92 if (*language) {
93 ERR_raise(ERR_LIB_X509V3, X509V3_R_POLICY_LANGUAGE_ALREADY_DEFINED);
94 X509V3_conf_err(val);
95 return 0;
96 }
97 if ((*language = OBJ_txt2obj(val->value, 0)) == NULL) {
98 ERR_raise(ERR_LIB_X509V3, X509V3_R_INVALID_OBJECT_IDENTIFIER);
99 X509V3_conf_err(val);
100 return 0;
101 }
102 } else if (strcmp(val->name, "pathlen") == 0) {
103 if (*pathlen) {
104 ERR_raise(ERR_LIB_X509V3,
105 X509V3_R_POLICY_PATH_LENGTH_ALREADY_DEFINED);
106 X509V3_conf_err(val);
107 return 0;
108 }
109 if (!X509V3_get_value_int(val, pathlen)) {
110 ERR_raise(ERR_LIB_X509V3, X509V3_R_POLICY_PATH_LENGTH);
111 X509V3_conf_err(val);
112 return 0;
113 }
114 } else if (strcmp(val->name, "policy") == 0) {
115 char *valp = val->value;
116 unsigned char *tmp_data = NULL;
117 long val_len;
118
119 if (*policy == NULL) {
120 *policy = ASN1_OCTET_STRING_new();
121 if (*policy == NULL) {
122 ERR_raise(ERR_LIB_X509V3, ERR_R_ASN1_LIB);
123 X509V3_conf_err(val);
124 return 0;
125 }
126 free_policy = 1;
127 }
128 if (CHECK_AND_SKIP_PREFIX(valp, "hex:")) {
129 unsigned char *tmp_data2 =
130 OPENSSL_hexstr2buf(valp, &val_len);
131
132 if (!tmp_data2) {
133 X509V3_conf_err(val);
134 goto err;
135 }
136
137 tmp_data = OPENSSL_realloc((*policy)->data,
138 (*policy)->length + val_len + 1);
139 if (tmp_data) {
140 (*policy)->data = tmp_data;
141 memcpy(&(*policy)->data[(*policy)->length],
142 tmp_data2, val_len);
143 (*policy)->length += val_len;
144 (*policy)->data[(*policy)->length] = '\0';
145 } else {
146 OPENSSL_free(tmp_data2);
147 /*
148 * realloc failure implies the original data space is b0rked
149 * too!
150 */
151 OPENSSL_free((*policy)->data);
152 (*policy)->data = NULL;
153 (*policy)->length = 0;
154 X509V3_conf_err(val);
155 goto err;
156 }
157 OPENSSL_free(tmp_data2);
158 } else if (CHECK_AND_SKIP_PREFIX(valp, "file:")) {
159 unsigned char buf[2048];
160 int n;
161 BIO *b = BIO_new_file(valp, "r");
162 if (!b) {
163 ERR_raise(ERR_LIB_X509V3, ERR_R_BIO_LIB);
164 X509V3_conf_err(val);
165 goto err;
166 }
167 while ((n = BIO_read(b, buf, sizeof(buf))) > 0
168 || (n == 0 && BIO_should_retry(b))) {
169 if (!n)
170 continue;
171
172 tmp_data = OPENSSL_realloc((*policy)->data,
173 (*policy)->length + n + 1);
174
175 if (!tmp_data) {
176 OPENSSL_free((*policy)->data);
177 (*policy)->data = NULL;
178 (*policy)->length = 0;
179 X509V3_conf_err(val);
180 BIO_free_all(b);
181 goto err;
182 }
183
184 (*policy)->data = tmp_data;
185 memcpy(&(*policy)->data[(*policy)->length], buf, n);
186 (*policy)->length += n;
187 (*policy)->data[(*policy)->length] = '\0';
188 }
189 BIO_free_all(b);
190
191 if (n < 0) {
192 ERR_raise(ERR_LIB_X509V3, ERR_R_BIO_LIB);
193 X509V3_conf_err(val);
194 goto err;
195 }
196 } else if (CHECK_AND_SKIP_PREFIX(valp, "text:")) {
197 val_len = strlen(valp);
198 tmp_data = OPENSSL_realloc((*policy)->data,
199 (*policy)->length + val_len + 1);
200 if (tmp_data) {
201 (*policy)->data = tmp_data;
202 memcpy(&(*policy)->data[(*policy)->length],
203 val->value + 5, val_len);
204 (*policy)->length += val_len;
205 (*policy)->data[(*policy)->length] = '\0';
206 } else {
207 /*
208 * realloc failure implies the original data space is b0rked
209 * too!
210 */
211 OPENSSL_free((*policy)->data);
212 (*policy)->data = NULL;
213 (*policy)->length = 0;
214 X509V3_conf_err(val);
215 goto err;
216 }
217 } else {
218 ERR_raise(ERR_LIB_X509V3, X509V3_R_INCORRECT_POLICY_SYNTAX_TAG);
219 X509V3_conf_err(val);
220 goto err;
221 }
222 if (!tmp_data) {
223 X509V3_conf_err(val);
224 goto err;
225 }
226 }
227 return 1;
228 err:
229 if (free_policy) {
230 ASN1_OCTET_STRING_free(*policy);
231 *policy = NULL;
232 }
233 return 0;
234 }
235
r2i_pci(X509V3_EXT_METHOD * method,X509V3_CTX * ctx,char * value)236 static PROXY_CERT_INFO_EXTENSION *r2i_pci(X509V3_EXT_METHOD *method,
237 X509V3_CTX *ctx, char *value)
238 {
239 PROXY_CERT_INFO_EXTENSION *pci = NULL;
240 STACK_OF(CONF_VALUE) *vals;
241 ASN1_OBJECT *language = NULL;
242 ASN1_INTEGER *pathlen = NULL;
243 ASN1_OCTET_STRING *policy = NULL;
244 int i, j;
245
246 vals = X509V3_parse_list(value);
247 for (i = 0; i < sk_CONF_VALUE_num(vals); i++) {
248 CONF_VALUE *cnf = sk_CONF_VALUE_value(vals, i);
249
250 if (!cnf->name || (*cnf->name != '@' && !cnf->value)) {
251 ERR_raise(ERR_LIB_X509V3, X509V3_R_INVALID_PROXY_POLICY_SETTING);
252 X509V3_conf_err(cnf);
253 goto err;
254 }
255 if (*cnf->name == '@') {
256 STACK_OF(CONF_VALUE) *sect;
257 int success_p = 1;
258
259 sect = X509V3_get_section(ctx, cnf->name + 1);
260 if (!sect) {
261 ERR_raise(ERR_LIB_X509V3, X509V3_R_INVALID_SECTION);
262 X509V3_conf_err(cnf);
263 goto err;
264 }
265 for (j = 0; success_p && j < sk_CONF_VALUE_num(sect); j++) {
266 success_p =
267 process_pci_value(sk_CONF_VALUE_value(sect, j),
268 &language, &pathlen, &policy);
269 }
270 X509V3_section_free(ctx, sect);
271 if (!success_p)
272 goto err;
273 } else {
274 if (!process_pci_value(cnf, &language, &pathlen, &policy)) {
275 X509V3_conf_err(cnf);
276 goto err;
277 }
278 }
279 }
280
281 /* Language is mandatory */
282 if (!language) {
283 ERR_raise(ERR_LIB_X509V3,
284 X509V3_R_NO_PROXY_CERT_POLICY_LANGUAGE_DEFINED);
285 goto err;
286 }
287 i = OBJ_obj2nid(language);
288 if ((i == NID_Independent || i == NID_id_ppl_inheritAll) && policy) {
289 ERR_raise(ERR_LIB_X509V3,
290 X509V3_R_POLICY_WHEN_PROXY_LANGUAGE_REQUIRES_NO_POLICY);
291 goto err;
292 }
293
294 pci = PROXY_CERT_INFO_EXTENSION_new();
295 if (pci == NULL) {
296 ERR_raise(ERR_LIB_X509V3, ERR_R_ASN1_LIB);
297 goto err;
298 }
299
300 pci->proxyPolicy->policyLanguage = language;
301 language = NULL;
302 pci->proxyPolicy->policy = policy;
303 policy = NULL;
304 pci->pcPathLengthConstraint = pathlen;
305 pathlen = NULL;
306 goto end;
307 err:
308 ASN1_OBJECT_free(language);
309 ASN1_INTEGER_free(pathlen);
310 pathlen = NULL;
311 ASN1_OCTET_STRING_free(policy);
312 policy = NULL;
313 PROXY_CERT_INFO_EXTENSION_free(pci);
314 pci = NULL;
315 end:
316 sk_CONF_VALUE_pop_free(vals, X509V3_conf_free);
317 return pci;
318 }
319
