1 /*
2 * Copyright 2004-2021 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 unsigned char *tmp_data = NULL;
116 long val_len;
117
118 if (*policy == NULL) {
119 *policy = ASN1_OCTET_STRING_new();
120 if (*policy == NULL) {
121 ERR_raise(ERR_LIB_X509V3, ERR_R_MALLOC_FAILURE);
122 X509V3_conf_err(val);
123 return 0;
124 }
125 free_policy = 1;
126 }
127 if (strncmp(val->value, "hex:", 4) == 0) {
128 unsigned char *tmp_data2 =
129 OPENSSL_hexstr2buf(val->value + 4, &val_len);
130
131 if (!tmp_data2) {
132 X509V3_conf_err(val);
133 goto err;
134 }
135
136 tmp_data = OPENSSL_realloc((*policy)->data,
137 (*policy)->length + val_len + 1);
138 if (tmp_data) {
139 (*policy)->data = tmp_data;
140 memcpy(&(*policy)->data[(*policy)->length],
141 tmp_data2, val_len);
142 (*policy)->length += val_len;
143 (*policy)->data[(*policy)->length] = '\0';
144 } else {
145 OPENSSL_free(tmp_data2);
146 /*
147 * realloc failure implies the original data space is b0rked
148 * too!
149 */
150 OPENSSL_free((*policy)->data);
151 (*policy)->data = NULL;
152 (*policy)->length = 0;
153 ERR_raise(ERR_LIB_X509V3, ERR_R_MALLOC_FAILURE);
154 X509V3_conf_err(val);
155 goto err;
156 }
157 OPENSSL_free(tmp_data2);
158 } else if (strncmp(val->value, "file:", 5) == 0) {
159 unsigned char buf[2048];
160 int n;
161 BIO *b = BIO_new_file(val->value + 5, "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 ERR_raise(ERR_LIB_X509V3, ERR_R_MALLOC_FAILURE);
180 X509V3_conf_err(val);
181 BIO_free_all(b);
182 goto err;
183 }
184
185 (*policy)->data = tmp_data;
186 memcpy(&(*policy)->data[(*policy)->length], buf, n);
187 (*policy)->length += n;
188 (*policy)->data[(*policy)->length] = '\0';
189 }
190 BIO_free_all(b);
191
192 if (n < 0) {
193 ERR_raise(ERR_LIB_X509V3, ERR_R_BIO_LIB);
194 X509V3_conf_err(val);
195 goto err;
196 }
197 } else if (strncmp(val->value, "text:", 5) == 0) {
198 val_len = strlen(val->value + 5);
199 tmp_data = OPENSSL_realloc((*policy)->data,
200 (*policy)->length + val_len + 1);
201 if (tmp_data) {
202 (*policy)->data = tmp_data;
203 memcpy(&(*policy)->data[(*policy)->length],
204 val->value + 5, val_len);
205 (*policy)->length += val_len;
206 (*policy)->data[(*policy)->length] = '\0';
207 } else {
208 /*
209 * realloc failure implies the original data space is b0rked
210 * too!
211 */
212 OPENSSL_free((*policy)->data);
213 (*policy)->data = NULL;
214 (*policy)->length = 0;
215 ERR_raise(ERR_LIB_X509V3, ERR_R_MALLOC_FAILURE);
216 X509V3_conf_err(val);
217 goto err;
218 }
219 } else {
220 ERR_raise(ERR_LIB_X509V3, X509V3_R_INCORRECT_POLICY_SYNTAX_TAG);
221 X509V3_conf_err(val);
222 goto err;
223 }
224 if (!tmp_data) {
225 ERR_raise(ERR_LIB_X509V3, ERR_R_MALLOC_FAILURE);
226 X509V3_conf_err(val);
227 goto err;
228 }
229 }
230 return 1;
231 err:
232 if (free_policy) {
233 ASN1_OCTET_STRING_free(*policy);
234 *policy = NULL;
235 }
236 return 0;
237 }
238
r2i_pci(X509V3_EXT_METHOD * method,X509V3_CTX * ctx,char * value)239 static PROXY_CERT_INFO_EXTENSION *r2i_pci(X509V3_EXT_METHOD *method,
240 X509V3_CTX *ctx, char *value)
241 {
242 PROXY_CERT_INFO_EXTENSION *pci = NULL;
243 STACK_OF(CONF_VALUE) *vals;
244 ASN1_OBJECT *language = NULL;
245 ASN1_INTEGER *pathlen = NULL;
246 ASN1_OCTET_STRING *policy = NULL;
247 int i, j;
248
249 vals = X509V3_parse_list(value);
250 for (i = 0; i < sk_CONF_VALUE_num(vals); i++) {
251 CONF_VALUE *cnf = sk_CONF_VALUE_value(vals, i);
252
253 if (!cnf->name || (*cnf->name != '@' && !cnf->value)) {
254 ERR_raise(ERR_LIB_X509V3, X509V3_R_INVALID_PROXY_POLICY_SETTING);
255 X509V3_conf_err(cnf);
256 goto err;
257 }
258 if (*cnf->name == '@') {
259 STACK_OF(CONF_VALUE) *sect;
260 int success_p = 1;
261
262 sect = X509V3_get_section(ctx, cnf->name + 1);
263 if (!sect) {
264 ERR_raise(ERR_LIB_X509V3, X509V3_R_INVALID_SECTION);
265 X509V3_conf_err(cnf);
266 goto err;
267 }
268 for (j = 0; success_p && j < sk_CONF_VALUE_num(sect); j++) {
269 success_p =
270 process_pci_value(sk_CONF_VALUE_value(sect, j),
271 &language, &pathlen, &policy);
272 }
273 X509V3_section_free(ctx, sect);
274 if (!success_p)
275 goto err;
276 } else {
277 if (!process_pci_value(cnf, &language, &pathlen, &policy)) {
278 X509V3_conf_err(cnf);
279 goto err;
280 }
281 }
282 }
283
284 /* Language is mandatory */
285 if (!language) {
286 ERR_raise(ERR_LIB_X509V3,
287 X509V3_R_NO_PROXY_CERT_POLICY_LANGUAGE_DEFINED);
288 goto err;
289 }
290 i = OBJ_obj2nid(language);
291 if ((i == NID_Independent || i == NID_id_ppl_inheritAll) && policy) {
292 ERR_raise(ERR_LIB_X509V3,
293 X509V3_R_POLICY_WHEN_PROXY_LANGUAGE_REQUIRES_NO_POLICY);
294 goto err;
295 }
296
297 pci = PROXY_CERT_INFO_EXTENSION_new();
298 if (pci == NULL) {
299 ERR_raise(ERR_LIB_X509V3, ERR_R_MALLOC_FAILURE);
300 goto err;
301 }
302
303 pci->proxyPolicy->policyLanguage = language;
304 language = NULL;
305 pci->proxyPolicy->policy = policy;
306 policy = NULL;
307 pci->pcPathLengthConstraint = pathlen;
308 pathlen = NULL;
309 goto end;
310 err:
311 ASN1_OBJECT_free(language);
312 ASN1_INTEGER_free(pathlen);
313 pathlen = NULL;
314 ASN1_OCTET_STRING_free(policy);
315 policy = NULL;
316 PROXY_CERT_INFO_EXTENSION_free(pci);
317 pci = NULL;
318 end:
319 sk_CONF_VALUE_pop_free(vals, X509V3_conf_free);
320 return pci;
321 }
322