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 H�gskolan
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 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
i2r_pci(X509V3_EXT_METHOD * method,PROXY_CERT_INFO_EXTENSION * pci,BIO * out,int indent)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
process_pci_value(CONF_VALUE * val,ASN1_OBJECT ** language,ASN1_INTEGER ** pathlen,ASN1_OCTET_STRING ** policy)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_ALREADTY_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_ALREADTY_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) goto err;
132
133 tmp_data = OPENSSL_realloc((*policy)->data,
134 (*policy)->length + val_len + 1);
135 if (tmp_data)
136 {
137 (*policy)->data = tmp_data;
138 memcpy(&(*policy)->data[(*policy)->length],
139 tmp_data2, val_len);
140 (*policy)->length += val_len;
141 (*policy)->data[(*policy)->length] = '\0';
142 }
143 }
144 else if (strncmp(val->value, "file:", 5) == 0)
145 {
146 unsigned char buf[2048];
147 int n;
148 BIO *b = BIO_new_file(val->value + 5, "r");
149 if (!b)
150 {
151 X509V3err(X509V3_F_PROCESS_PCI_VALUE,ERR_R_BIO_LIB);
152 X509V3_conf_err(val);
153 goto err;
154 }
155 while((n = BIO_read(b, buf, sizeof(buf))) > 0
156 || (n == 0 && BIO_should_retry(b)))
157 {
158 if (!n) continue;
159
160 tmp_data = OPENSSL_realloc((*policy)->data,
161 (*policy)->length + n + 1);
162
163 if (!tmp_data)
164 break;
165
166 (*policy)->data = tmp_data;
167 memcpy(&(*policy)->data[(*policy)->length],
168 buf, n);
169 (*policy)->length += n;
170 (*policy)->data[(*policy)->length] = '\0';
171 }
172
173 if (n < 0)
174 {
175 X509V3err(X509V3_F_PROCESS_PCI_VALUE,ERR_R_BIO_LIB);
176 X509V3_conf_err(val);
177 goto err;
178 }
179 }
180 else if (strncmp(val->value, "text:", 5) == 0)
181 {
182 val_len = strlen(val->value + 5);
183 tmp_data = OPENSSL_realloc((*policy)->data,
184 (*policy)->length + val_len + 1);
185 if (tmp_data)
186 {
187 (*policy)->data = tmp_data;
188 memcpy(&(*policy)->data[(*policy)->length],
189 val->value + 5, val_len);
190 (*policy)->length += val_len;
191 (*policy)->data[(*policy)->length] = '\0';
192 }
193 }
194 else
195 {
196 X509V3err(X509V3_F_PROCESS_PCI_VALUE,X509V3_R_INCORRECT_POLICY_SYNTAX_TAG);
197 X509V3_conf_err(val);
198 goto err;
199 }
200 if (!tmp_data)
201 {
202 X509V3err(X509V3_F_PROCESS_PCI_VALUE,ERR_R_MALLOC_FAILURE);
203 X509V3_conf_err(val);
204 goto err;
205 }
206 }
207 return 1;
208 err:
209 if (free_policy)
210 {
211 ASN1_OCTET_STRING_free(*policy);
212 *policy = NULL;
213 }
214 return 0;
215 }
216
r2i_pci(X509V3_EXT_METHOD * method,X509V3_CTX * ctx,char * value)217 static PROXY_CERT_INFO_EXTENSION *r2i_pci(X509V3_EXT_METHOD *method,
218 X509V3_CTX *ctx, char *value)
219 {
220 PROXY_CERT_INFO_EXTENSION *pci = NULL;
221 STACK_OF(CONF_VALUE) *vals;
222 ASN1_OBJECT *language = NULL;
223 ASN1_INTEGER *pathlen = NULL;
224 ASN1_OCTET_STRING *policy = NULL;
225 int i, j;
226
227 vals = X509V3_parse_list(value);
228 for (i = 0; i < sk_CONF_VALUE_num(vals); i++)
229 {
230 CONF_VALUE *cnf = sk_CONF_VALUE_value(vals, i);
231 if (!cnf->name || (*cnf->name != '@' && !cnf->value))
232 {
233 X509V3err(X509V3_F_R2I_PCI,X509V3_R_INVALID_PROXY_POLICY_SETTING);
234 X509V3_conf_err(cnf);
235 goto err;
236 }
237 if (*cnf->name == '@')
238 {
239 STACK_OF(CONF_VALUE) *sect;
240 int success_p = 1;
241
242 sect = X509V3_get_section(ctx, cnf->name + 1);
243 if (!sect)
244 {
245 X509V3err(X509V3_F_R2I_PCI,X509V3_R_INVALID_SECTION);
246 X509V3_conf_err(cnf);
247 goto err;
248 }
249 for (j = 0; success_p && j < sk_CONF_VALUE_num(sect); j++)
250 {
251 success_p =
252 process_pci_value(sk_CONF_VALUE_value(sect, j),
253 &language, &pathlen, &policy);
254 }
255 X509V3_section_free(ctx, sect);
256 if (!success_p)
257 goto err;
258 }
259 else
260 {
261 if (!process_pci_value(cnf,
262 &language, &pathlen, &policy))
263 {
264 X509V3_conf_err(cnf);
265 goto err;
266 }
267 }
268 }
269
270 /* Language is mandatory */
271 if (!language)
272 {
273 X509V3err(X509V3_F_R2I_PCI,X509V3_R_NO_PROXY_CERT_POLICY_LANGUAGE_DEFINED);
274 goto err;
275 }
276 i = OBJ_obj2nid(language);
277 if ((i == NID_Independent || i == NID_id_ppl_inheritAll) && policy)
278 {
279 X509V3err(X509V3_F_R2I_PCI,X509V3_R_POLICY_WHEN_PROXY_LANGUAGE_REQUIRES_NO_POLICY);
280 goto err;
281 }
282
283 pci = PROXY_CERT_INFO_EXTENSION_new();
284 if (!pci)
285 {
286 X509V3err(X509V3_F_R2I_PCI,ERR_R_MALLOC_FAILURE);
287 goto err;
288 }
289 pci->proxyPolicy = PROXY_POLICY_new();
290 if (!pci->proxyPolicy)
291 {
292 X509V3err(X509V3_F_R2I_PCI,ERR_R_MALLOC_FAILURE);
293 goto err;
294 }
295
296 pci->proxyPolicy->policyLanguage = language; language = NULL;
297 pci->proxyPolicy->policy = policy; policy = NULL;
298 pci->pcPathLengthConstraint = pathlen; pathlen = NULL;
299 goto end;
300 err:
301 if (language) { ASN1_OBJECT_free(language); language = NULL; }
302 if (pathlen) { ASN1_INTEGER_free(pathlen); pathlen = NULL; }
303 if (policy) { ASN1_OCTET_STRING_free(policy); policy = NULL; }
304 if (pci && pci->proxyPolicy)
305 {
306 PROXY_POLICY_free(pci->proxyPolicy);
307 pci->proxyPolicy = NULL;
308 }
309 if (pci) { PROXY_CERT_INFO_EXTENSION_free(pci); pci = NULL; }
310 end:
311 sk_CONF_VALUE_pop_free(vals, X509V3_conf_free);
312 return pci;
313 }
314