1/*
2 * Copyright 2004-2016 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
52static int i2r_pci(X509V3_EXT_METHOD *method, PROXY_CERT_INFO_EXTENSION *ext,
53 BIO *out, int indent);
54static PROXY_CERT_INFO_EXTENSION *r2i_pci(X509V3_EXT_METHOD *method,
55 X509V3_CTX *ctx, char *str);
56
57const X509V3_EXT_METHOD 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
67static 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->data);
81 return 1;
82}
83
84static int process_pci_value(CONF_VALUE *val,
85 ASN1_OBJECT **language, ASN1_INTEGER **pathlen,
86 ASN1_OCTET_STRING **policy)
87{
88 int free_policy = 0;
89
90 if (strcmp(val->name, "language") == 0) {
91 if (*language) {
92 X509V3err(X509V3_F_PROCESS_PCI_VALUE,
93 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 X509V3err(X509V3_F_PROCESS_PCI_VALUE,
99 X509V3_R_INVALID_OBJECT_IDENTIFIER);
100 X509V3_conf_err(val);
101 return 0;
102 }
103 } else if (strcmp(val->name, "pathlen") == 0) {
104 if (*pathlen) {
105 X509V3err(X509V3_F_PROCESS_PCI_VALUE,
106 X509V3_R_POLICY_PATH_LENGTH_ALREADY_DEFINED);
107 X509V3_conf_err(val);
108 return 0;
109 }
110 if (!X509V3_get_value_int(val, pathlen)) {
111 X509V3err(X509V3_F_PROCESS_PCI_VALUE,
112 X509V3_R_POLICY_PATH_LENGTH);
113 X509V3_conf_err(val);
114 return 0;
115 }
116 } else if (strcmp(val->name, "policy") == 0) {
117 unsigned char *tmp_data = NULL;
118 long val_len;
119
120 if (*policy == NULL) {
121 *policy = ASN1_OCTET_STRING_new();
122 if (*policy == NULL) {
123 X509V3err(X509V3_F_PROCESS_PCI_VALUE, ERR_R_MALLOC_FAILURE);
124 X509V3_conf_err(val);
125 return 0;
126 }
127 free_policy = 1;
128 }
129 if (strncmp(val->value, "hex:", 4) == 0) {
130 unsigned char *tmp_data2 =
131 OPENSSL_hexstr2buf(val->value + 4, &val_len);
132
133 if (!tmp_data2) {
134 X509V3_conf_err(val);
135 goto err;
136 }
137
138 tmp_data = OPENSSL_realloc((*policy)->data,
139 (*policy)->length + val_len + 1);
140 if (tmp_data) {
141 (*policy)->data = tmp_data;
142 memcpy(&(*policy)->data[(*policy)->length],
143 tmp_data2, val_len);
144 (*policy)->length += val_len;
145 (*policy)->data[(*policy)->length] = '\0';
146 } else {
147 OPENSSL_free(tmp_data2);
148 /*
149 * realloc failure implies the original data space is b0rked
150 * too!
151 */
152 OPENSSL_free((*policy)->data);
153 (*policy)->data = NULL;
154 (*policy)->length = 0;
155 X509V3err(X509V3_F_PROCESS_PCI_VALUE, ERR_R_MALLOC_FAILURE);
156 X509V3_conf_err(val);
157 goto err;
158 }
159 OPENSSL_free(tmp_data2);
160 } else if (strncmp(val->value, "file:", 5) == 0) {
161 unsigned char buf[2048];
162 int n;
163 BIO *b = BIO_new_file(val->value + 5, "r");
164 if (!b) {
165 X509V3err(X509V3_F_PROCESS_PCI_VALUE, ERR_R_BIO_LIB);
166 X509V3_conf_err(val);
167 goto err;
168 }
169 while ((n = BIO_read(b, buf, sizeof(buf))) > 0
170 || (n == 0 && BIO_should_retry(b))) {
171 if (!n)
172 continue;
173
174 tmp_data = OPENSSL_realloc((*policy)->data,
175 (*policy)->length + n + 1);
176
177 if (!tmp_data) {
178 OPENSSL_free((*policy)->data);
179 (*policy)->data = NULL;
180 (*policy)->length = 0;
181 X509V3err(X509V3_F_PROCESS_PCI_VALUE,
182 ERR_R_MALLOC_FAILURE);
183 X509V3_conf_err(val);
184 BIO_free_all(b);
185 goto err;
186 }
187
188 (*policy)->data = tmp_data;
189 memcpy(&(*policy)->data[(*policy)->length], buf, n);
190 (*policy)->length += n;
191 (*policy)->data[(*policy)->length] = '\0';
192 }
193 BIO_free_all(b);
194
195 if (n < 0) {
196 X509V3err(X509V3_F_PROCESS_PCI_VALUE, ERR_R_BIO_LIB);
197 X509V3_conf_err(val);
198 goto err;
199 }
200 } else if (strncmp(val->value, "text:", 5) == 0) {
201 val_len = strlen(val->value + 5);
202 tmp_data = OPENSSL_realloc((*policy)->data,
203 (*policy)->length + val_len + 1);
204 if (tmp_data) {
205 (*policy)->data = tmp_data;
206 memcpy(&(*policy)->data[(*policy)->length],
207 val->value + 5, val_len);
208 (*policy)->length += val_len;
209 (*policy)->data[(*policy)->length] = '\0';
210 } else {
211 /*
212 * realloc failure implies the original data space is b0rked
213 * too!
214 */
215 OPENSSL_free((*policy)->data);
216 (*policy)->data = NULL;
217 (*policy)->length = 0;
218 X509V3err(X509V3_F_PROCESS_PCI_VALUE, ERR_R_MALLOC_FAILURE);
219 X509V3_conf_err(val);
220 goto err;
221 }
222 } else {
223 X509V3err(X509V3_F_PROCESS_PCI_VALUE,
224 X509V3_R_INCORRECT_POLICY_SYNTAX_TAG);
225 X509V3_conf_err(val);
226 goto err;
227 }
228 if (!tmp_data) {
229 X509V3err(X509V3_F_PROCESS_PCI_VALUE, ERR_R_MALLOC_FAILURE);
230 X509V3_conf_err(val);
231 goto err;
232 }
233 }
234 return 1;
235 err:
236 if (free_policy) {
237 ASN1_OCTET_STRING_free(*policy);
238 *policy = NULL;
239 }
240 return 0;
241}
242
243static PROXY_CERT_INFO_EXTENSION *r2i_pci(X509V3_EXT_METHOD *method,
244 X509V3_CTX *ctx, char *value)
245{
246 PROXY_CERT_INFO_EXTENSION *pci = NULL;
247 STACK_OF(CONF_VALUE) *vals;
248 ASN1_OBJECT *language = NULL;
249 ASN1_INTEGER *pathlen = NULL;
250 ASN1_OCTET_STRING *policy = NULL;
251 int i, j;
252
253 vals = X509V3_parse_list(value);
254 for (i = 0; i < sk_CONF_VALUE_num(vals); i++) {
255 CONF_VALUE *cnf = sk_CONF_VALUE_value(vals, i);
256 if (!cnf->name || (*cnf->name != '@' && !cnf->value)) {
257 X509V3err(X509V3_F_R2I_PCI,
258 X509V3_R_INVALID_PROXY_POLICY_SETTING);
259 X509V3_conf_err(cnf);
260 goto err;
261 }
262 if (*cnf->name == '@') {
263 STACK_OF(CONF_VALUE) *sect;
264 int success_p = 1;
265
266 sect = X509V3_get_section(ctx, cnf->name + 1);
267 if (!sect) {
268 X509V3err(X509V3_F_R2I_PCI, X509V3_R_INVALID_SECTION);
269 X509V3_conf_err(cnf);
270 goto err;
271 }
272 for (j = 0; success_p && j < sk_CONF_VALUE_num(sect); j++) {
273 success_p =
274 process_pci_value(sk_CONF_VALUE_value(sect, j),
275 &language, &pathlen, &policy);
276 }
277 X509V3_section_free(ctx, sect);
278 if (!success_p)
279 goto err;
280 } else {
281 if (!process_pci_value(cnf, &language, &pathlen, &policy)) {
282 X509V3_conf_err(cnf);
283 goto err;
284 }
285 }
286 }
287
288 /* Language is mandatory */
289 if (!language) {
290 X509V3err(X509V3_F_R2I_PCI,
291 X509V3_R_NO_PROXY_CERT_POLICY_LANGUAGE_DEFINED);
292 goto err;
293 }
294 i = OBJ_obj2nid(language);
295 if ((i == NID_Independent || i == NID_id_ppl_inheritAll) && policy) {
296 X509V3err(X509V3_F_R2I_PCI,
297 X509V3_R_POLICY_WHEN_PROXY_LANGUAGE_REQUIRES_NO_POLICY);
298 goto err;
299 }
300
301 pci = PROXY_CERT_INFO_EXTENSION_new();
302 if (pci == NULL) {
303 X509V3err(X509V3_F_R2I_PCI, ERR_R_MALLOC_FAILURE);
304 goto err;
305 }
306
307 pci->proxyPolicy->policyLanguage = language;
308 language = NULL;
309 pci->proxyPolicy->policy = policy;
310 policy = NULL;
311 pci->pcPathLengthConstraint = pathlen;
312 pathlen = NULL;
313 goto end;
314 err:
315 ASN1_OBJECT_free(language);
316 ASN1_INTEGER_free(pathlen);
317 pathlen = NULL;
318 ASN1_OCTET_STRING_free(policy);
319 policy = NULL;
320 PROXY_CERT_INFO_EXTENSION_free(pci);
321 pci = NULL;
322 end:
323 sk_CONF_VALUE_pop_free(vals, X509V3_conf_free);
324 return pci;
325}
326