1 /* v3_pci.c -*- mode:C; c-file-style: "eay" -*- */
2 /* Contributed to the OpenSSL Project 2004
3 * by Richard Levitte (richard@levitte.org)
4 */
5 /* Copyright (c) 2004 Kungliga Tekniska Högskolan
6 * (Royal Institute of Technology, Stockholm, Sweden).
7 * 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 the
18 * documentation and/or other materials provided with the distribution.
19 *
20 * 3. Neither the name of the Institute nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 */
36
37 #include <stdio.h>
38 #include "cryptlib.h"
39 #include <openssl/conf.h>
40 #include <openssl/x509v3.h>
41
42 static int i2r_pci(X509V3_EXT_METHOD *method, PROXY_CERT_INFO_EXTENSION *ext,
43 BIO *out, int indent);
44 static PROXY_CERT_INFO_EXTENSION *r2i_pci(X509V3_EXT_METHOD *method,
45 X509V3_CTX *ctx, char *str);
46
47 const X509V3_EXT_METHOD v3_pci =
48 { NID_proxyCertInfo, 0, ASN1_ITEM_ref(PROXY_CERT_INFO_EXTENSION),
49 0,0,0,0,
50 0,0,
51 NULL, NULL,
52 (X509V3_EXT_I2R)i2r_pci,
53 (X509V3_EXT_R2I)r2i_pci,
54 NULL,
55 };
56
57 static int i2r_pci(X509V3_EXT_METHOD *method, PROXY_CERT_INFO_EXTENSION *pci,
58 BIO *out, int indent)
59 {
60 BIO_printf(out, "%*sPath Length Constraint: ", indent, "");
61 if (pci->pcPathLengthConstraint)
62 i2a_ASN1_INTEGER(out, pci->pcPathLengthConstraint);
63 else
64 BIO_printf(out, "infinite");
65 BIO_puts(out, "\n");
66 BIO_printf(out, "%*sPolicy Language: ", indent, "");
67 i2a_ASN1_OBJECT(out, pci->proxyPolicy->policyLanguage);
68 BIO_puts(out, "\n");
69 if (pci->proxyPolicy->policy && pci->proxyPolicy->policy->data)
70 BIO_printf(out, "%*sPolicy Text: %s\n", indent, "",
71 pci->proxyPolicy->policy->data);
72 return 1;
73 }
74
75 static int process_pci_value(CONF_VALUE *val,
76 ASN1_OBJECT **language, ASN1_INTEGER **pathlen,
77 ASN1_OCTET_STRING **policy)
78 {
79 int free_policy = 0;
80
81 if (strcmp(val->name, "language") == 0)
82 {
83 if (*language)
84 {
85 X509V3err(X509V3_F_PROCESS_PCI_VALUE,X509V3_R_POLICY_LANGUAGE_ALREADY_DEFINED);
86 X509V3_conf_err(val);
87 return 0;
88 }
89 if (!(*language = OBJ_txt2obj(val->value, 0)))
90 {
91 X509V3err(X509V3_F_PROCESS_PCI_VALUE,X509V3_R_INVALID_OBJECT_IDENTIFIER);
92 X509V3_conf_err(val);
93 return 0;
94 }
95 }
96 else if (strcmp(val->name, "pathlen") == 0)
97 {
98 if (*pathlen)
99 {
100 X509V3err(X509V3_F_PROCESS_PCI_VALUE,X509V3_R_POLICY_PATH_LENGTH_ALREADY_DEFINED);
101 X509V3_conf_err(val);
102 return 0;
103 }
104 if (!X509V3_get_value_int(val, pathlen))
105 {
106 X509V3err(X509V3_F_PROCESS_PCI_VALUE,X509V3_R_POLICY_PATH_LENGTH);
107 X509V3_conf_err(val);
108 return 0;
109 }
110 }
111 else if (strcmp(val->name, "policy") == 0)
112 {
113 unsigned char *tmp_data = NULL;
114 long val_len;
115 if (!*policy)
116 {
117 *policy = ASN1_OCTET_STRING_new();
118 if (!*policy)
119 {
120 X509V3err(X509V3_F_PROCESS_PCI_VALUE,ERR_R_MALLOC_FAILURE);
121 X509V3_conf_err(val);
122 return 0;
123 }
124 free_policy = 1;
125 }
126 if (strncmp(val->value, "hex:", 4) == 0)
127 {
128 unsigned char *tmp_data2 =
129 string_to_hex(val->value + 4, &val_len);
130
131 if (!tmp_data2)
132 {
133 X509V3err(X509V3_F_PROCESS_PCI_VALUE,X509V3_R_ILLEGAL_HEX_DIGIT);
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 {
142 (*policy)->data = tmp_data;
143 memcpy(&(*policy)->data[(*policy)->length],
144 tmp_data2, val_len);
145 (*policy)->length += val_len;
146 (*policy)->data[(*policy)->length] = '\0';
147 }
148 else
149 {
150 OPENSSL_free(tmp_data2);
151 /* realloc failure implies the original data space is b0rked too! */
152 (*policy)->data = NULL;
153 (*policy)->length = 0;
154 X509V3err(X509V3_F_PROCESS_PCI_VALUE,ERR_R_MALLOC_FAILURE);
155 X509V3_conf_err(val);
156 goto err;
157 }
158 OPENSSL_free(tmp_data2);
159 }
160 else if (strncmp(val->value, "file:", 5) == 0)
161 {
162 unsigned char buf[2048];
163 int n;
164 BIO *b = BIO_new_file(val->value + 5, "r");
165 if (!b)
166 {
167 X509V3err(X509V3_F_PROCESS_PCI_VALUE,ERR_R_BIO_LIB);
168 X509V3_conf_err(val);
169 goto err;
170 }
171 while((n = BIO_read(b, buf, sizeof(buf))) > 0
172 || (n == 0 && BIO_should_retry(b)))
173 {
174 if (!n) continue;
175
176 tmp_data = OPENSSL_realloc((*policy)->data,
177 (*policy)->length + n + 1);
178
179 if (!tmp_data)
180 break;
181
182 (*policy)->data = tmp_data;
183 memcpy(&(*policy)->data[(*policy)->length],
184 buf, n);
185 (*policy)->length += n;
186 (*policy)->data[(*policy)->length] = '\0';
187 }
188 BIO_free_all(b);
189
190 if (n < 0)
191 {
192 X509V3err(X509V3_F_PROCESS_PCI_VALUE,ERR_R_BIO_LIB);
193 X509V3_conf_err(val);
194 goto err;
195 }
196 }
197 else if (strncmp(val->value, "text:", 5) == 0)
198 {
199 val_len = strlen(val->value + 5);
200 tmp_data = OPENSSL_realloc((*policy)->data,
201 (*policy)->length + val_len + 1);
202 if (tmp_data)
203 {
204 (*policy)->data = tmp_data;
205 memcpy(&(*policy)->data[(*policy)->length],
206 val->value + 5, val_len);
207 (*policy)->length += val_len;
208 (*policy)->data[(*policy)->length] = '\0';
209 }
210 else
211 {
212 /* realloc failure implies the original data space is b0rked too! */
213 (*policy)->data = NULL;
214 (*policy)->length = 0;
215 X509V3err(X509V3_F_PROCESS_PCI_VALUE,ERR_R_MALLOC_FAILURE);
216 X509V3_conf_err(val);
217 goto err;
218 }
219 }
220 else
221 {
222 X509V3err(X509V3_F_PROCESS_PCI_VALUE,X509V3_R_INCORRECT_POLICY_SYNTAX_TAG);
223 X509V3_conf_err(val);
224 goto err;
225 }
226 if (!tmp_data)
227 {
228 X509V3err(X509V3_F_PROCESS_PCI_VALUE,ERR_R_MALLOC_FAILURE);
229 X509V3_conf_err(val);
230 goto err;
231 }
232 }
233 return 1;
234 err:
235 if (free_policy)
236 {
237 ASN1_OCTET_STRING_free(*policy);
238 *policy = NULL;
239 }
240 return 0;
241 }
242
243 static 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 {
256 CONF_VALUE *cnf = sk_CONF_VALUE_value(vals, i);
257 if (!cnf->name || (*cnf->name != '@' && !cnf->value))
258 {
259 X509V3err(X509V3_F_R2I_PCI,X509V3_R_INVALID_PROXY_POLICY_SETTING);
260 X509V3_conf_err(cnf);
261 goto err;
262 }
263 if (*cnf->name == '@')
264 {
265 STACK_OF(CONF_VALUE) *sect;
266 int success_p = 1;
267
268 sect = X509V3_get_section(ctx, cnf->name + 1);
269 if (!sect)
270 {
271 X509V3err(X509V3_F_R2I_PCI,X509V3_R_INVALID_SECTION);
272 X509V3_conf_err(cnf);
273 goto err;
274 }
275 for (j = 0; success_p && j < sk_CONF_VALUE_num(sect); j++)
276 {
277 success_p =
278 process_pci_value(sk_CONF_VALUE_value(sect, j),
279 &language, &pathlen, &policy);
280 }
281 X509V3_section_free(ctx, sect);
282 if (!success_p)
283 goto err;
284 }
285 else
286 {
287 if (!process_pci_value(cnf,
288 &language, &pathlen, &policy))
289 {
290 X509V3_conf_err(cnf);
291 goto err;
292 }
293 }
294 }
295
296 /* Language is mandatory */
297 if (!language)
298 {
299 X509V3err(X509V3_F_R2I_PCI,X509V3_R_NO_PROXY_CERT_POLICY_LANGUAGE_DEFINED);
300 goto err;
301 }
302 i = OBJ_obj2nid(language);
303 if ((i == NID_Independent || i == NID_id_ppl_inheritAll) && policy)
304 {
305 X509V3err(X509V3_F_R2I_PCI,X509V3_R_POLICY_WHEN_PROXY_LANGUAGE_REQUIRES_NO_POLICY);
306 goto err;
307 }
308
309 pci = PROXY_CERT_INFO_EXTENSION_new();
310 if (!pci)
311 {
312 X509V3err(X509V3_F_R2I_PCI,ERR_R_MALLOC_FAILURE);
313 goto err;
314 }
315
316 pci->proxyPolicy->policyLanguage = language; language = NULL;
317 pci->proxyPolicy->policy = policy; policy = NULL;
318 pci->pcPathLengthConstraint = pathlen; pathlen = NULL;
319 goto end;
320 err:
321 if (language) { ASN1_OBJECT_free(language); language = NULL; }
322 if (pathlen) { ASN1_INTEGER_free(pathlen); pathlen = NULL; }
323 if (policy) { ASN1_OCTET_STRING_free(policy); policy = NULL; }
324 if (pci) { PROXY_CERT_INFO_EXTENSION_free(pci); pci = NULL; }
325 end:
326 sk_CONF_VALUE_pop_free(vals, X509V3_conf_free);
327 return pci;
328 }