Line data Source code
1 : /* v3_pci.c -*- mode:C; c-file-style: "eay" -*- */
2 : /*
3 : * Contributed to the OpenSSL Project 2004 by Richard Levitte
4 : * (richard@levitte.org)
5 : */
6 : /* Copyright (c) 2004 Kungliga Tekniska Högskolan
7 : * (Royal Institute of Technology, Stockholm, Sweden).
8 : * All rights reserved.
9 : *
10 : * Redistribution and use in source and binary forms, with or without
11 : * modification, are permitted provided that the following conditions
12 : * are met:
13 : *
14 : * 1. Redistributions of source code must retain the above copyright
15 : * notice, this list of conditions and the following disclaimer.
16 : *
17 : * 2. Redistributions in binary form must reproduce the above copyright
18 : * notice, this list of conditions and the following disclaimer in the
19 : * documentation and/or other materials provided with the distribution.
20 : *
21 : * 3. Neither the name of the Institute nor the names of its contributors
22 : * may be used to endorse or promote products derived from this software
23 : * without specific prior written permission.
24 : *
25 : * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
26 : * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 : * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 : * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
29 : * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30 : * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31 : * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32 : * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33 : * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34 : * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 : * SUCH DAMAGE.
36 : */
37 :
38 : #include <stdio.h>
39 : #include "cryptlib.h"
40 : #include <openssl/conf.h>
41 : #include <openssl/x509v3.h>
42 :
43 : static int i2r_pci(X509V3_EXT_METHOD *method, PROXY_CERT_INFO_EXTENSION *ext,
44 : BIO *out, int indent);
45 : static PROXY_CERT_INFO_EXTENSION *r2i_pci(X509V3_EXT_METHOD *method,
46 : X509V3_CTX *ctx, char *str);
47 :
48 : const X509V3_EXT_METHOD v3_pci =
49 : { NID_proxyCertInfo, 0, ASN1_ITEM_ref(PROXY_CERT_INFO_EXTENSION),
50 : 0, 0, 0, 0,
51 : 0, 0,
52 : NULL, NULL,
53 : (X509V3_EXT_I2R)i2r_pci,
54 : (X509V3_EXT_R2I)r2i_pci,
55 : NULL,
56 : };
57 :
58 0 : static int i2r_pci(X509V3_EXT_METHOD *method, PROXY_CERT_INFO_EXTENSION *pci,
59 : BIO *out, int indent)
60 : {
61 0 : BIO_printf(out, "%*sPath Length Constraint: ", indent, "");
62 0 : if (pci->pcPathLengthConstraint)
63 0 : i2a_ASN1_INTEGER(out, pci->pcPathLengthConstraint);
64 : else
65 0 : BIO_printf(out, "infinite");
66 0 : BIO_puts(out, "\n");
67 0 : BIO_printf(out, "%*sPolicy Language: ", indent, "");
68 0 : i2a_ASN1_OBJECT(out, pci->proxyPolicy->policyLanguage);
69 0 : BIO_puts(out, "\n");
70 0 : if (pci->proxyPolicy->policy && pci->proxyPolicy->policy->data)
71 0 : BIO_printf(out, "%*sPolicy Text: %s\n", indent, "",
72 : pci->proxyPolicy->policy->data);
73 0 : return 1;
74 : }
75 :
76 0 : static int process_pci_value(CONF_VALUE *val,
77 : ASN1_OBJECT **language, ASN1_INTEGER **pathlen,
78 : ASN1_OCTET_STRING **policy)
79 : {
80 : int free_policy = 0;
81 :
82 0 : if (strcmp(val->name, "language") == 0) {
83 0 : if (*language) {
84 0 : X509V3err(X509V3_F_PROCESS_PCI_VALUE,
85 : X509V3_R_POLICY_LANGUAGE_ALREADY_DEFINED);
86 0 : X509V3_conf_err(val);
87 0 : return 0;
88 : }
89 0 : if (!(*language = OBJ_txt2obj(val->value, 0))) {
90 0 : X509V3err(X509V3_F_PROCESS_PCI_VALUE,
91 : X509V3_R_INVALID_OBJECT_IDENTIFIER);
92 0 : X509V3_conf_err(val);
93 0 : return 0;
94 : }
95 0 : } else if (strcmp(val->name, "pathlen") == 0) {
96 0 : if (*pathlen) {
97 0 : X509V3err(X509V3_F_PROCESS_PCI_VALUE,
98 : X509V3_R_POLICY_PATH_LENGTH_ALREADY_DEFINED);
99 0 : X509V3_conf_err(val);
100 0 : return 0;
101 : }
102 0 : if (!X509V3_get_value_int(val, pathlen)) {
103 0 : X509V3err(X509V3_F_PROCESS_PCI_VALUE,
104 : X509V3_R_POLICY_PATH_LENGTH);
105 0 : X509V3_conf_err(val);
106 0 : return 0;
107 : }
108 0 : } else if (strcmp(val->name, "policy") == 0) {
109 : unsigned char *tmp_data = NULL;
110 : long val_len;
111 0 : if (!*policy) {
112 0 : *policy = ASN1_OCTET_STRING_new();
113 0 : if (!*policy) {
114 0 : X509V3err(X509V3_F_PROCESS_PCI_VALUE, ERR_R_MALLOC_FAILURE);
115 0 : X509V3_conf_err(val);
116 0 : return 0;
117 : }
118 : free_policy = 1;
119 : }
120 0 : if (strncmp(val->value, "hex:", 4) == 0) {
121 0 : unsigned char *tmp_data2 =
122 0 : string_to_hex(val->value + 4, &val_len);
123 :
124 0 : if (!tmp_data2) {
125 0 : X509V3err(X509V3_F_PROCESS_PCI_VALUE,
126 : X509V3_R_ILLEGAL_HEX_DIGIT);
127 0 : X509V3_conf_err(val);
128 0 : goto err;
129 : }
130 :
131 0 : tmp_data = OPENSSL_realloc((*policy)->data,
132 : (*policy)->length + val_len + 1);
133 0 : if (tmp_data) {
134 0 : (*policy)->data = tmp_data;
135 0 : memcpy(&(*policy)->data[(*policy)->length],
136 : tmp_data2, val_len);
137 0 : (*policy)->length += val_len;
138 0 : (*policy)->data[(*policy)->length] = '\0';
139 : } else {
140 0 : OPENSSL_free(tmp_data2);
141 : /*
142 : * realloc failure implies the original data space is b0rked
143 : * too!
144 : */
145 0 : (*policy)->data = NULL;
146 0 : (*policy)->length = 0;
147 0 : X509V3err(X509V3_F_PROCESS_PCI_VALUE, ERR_R_MALLOC_FAILURE);
148 0 : X509V3_conf_err(val);
149 0 : goto err;
150 : }
151 0 : OPENSSL_free(tmp_data2);
152 0 : } else if (strncmp(val->value, "file:", 5) == 0) {
153 : unsigned char buf[2048];
154 : int n;
155 0 : BIO *b = BIO_new_file(val->value + 5, "r");
156 0 : if (!b) {
157 0 : X509V3err(X509V3_F_PROCESS_PCI_VALUE, ERR_R_BIO_LIB);
158 0 : X509V3_conf_err(val);
159 0 : goto err;
160 : }
161 0 : while ((n = BIO_read(b, buf, sizeof(buf))) > 0
162 0 : || (n == 0 && BIO_should_retry(b))) {
163 0 : if (!n)
164 0 : continue;
165 :
166 0 : tmp_data = OPENSSL_realloc((*policy)->data,
167 : (*policy)->length + n + 1);
168 :
169 0 : if (!tmp_data)
170 : break;
171 :
172 0 : (*policy)->data = tmp_data;
173 0 : memcpy(&(*policy)->data[(*policy)->length], buf, n);
174 0 : (*policy)->length += n;
175 0 : (*policy)->data[(*policy)->length] = '\0';
176 : }
177 0 : BIO_free_all(b);
178 :
179 0 : if (n < 0) {
180 0 : X509V3err(X509V3_F_PROCESS_PCI_VALUE, ERR_R_BIO_LIB);
181 0 : X509V3_conf_err(val);
182 0 : goto err;
183 : }
184 0 : } else if (strncmp(val->value, "text:", 5) == 0) {
185 0 : val_len = strlen(val->value + 5);
186 0 : tmp_data = OPENSSL_realloc((*policy)->data,
187 : (*policy)->length + val_len + 1);
188 0 : if (tmp_data) {
189 0 : (*policy)->data = tmp_data;
190 0 : memcpy(&(*policy)->data[(*policy)->length],
191 0 : val->value + 5, val_len);
192 0 : (*policy)->length += val_len;
193 0 : (*policy)->data[(*policy)->length] = '\0';
194 : } else {
195 : /*
196 : * realloc failure implies the original data space is b0rked
197 : * too!
198 : */
199 0 : (*policy)->data = NULL;
200 0 : (*policy)->length = 0;
201 0 : X509V3err(X509V3_F_PROCESS_PCI_VALUE, ERR_R_MALLOC_FAILURE);
202 0 : X509V3_conf_err(val);
203 0 : goto err;
204 : }
205 : } else {
206 0 : X509V3err(X509V3_F_PROCESS_PCI_VALUE,
207 : X509V3_R_INCORRECT_POLICY_SYNTAX_TAG);
208 0 : X509V3_conf_err(val);
209 0 : goto err;
210 : }
211 0 : if (!tmp_data) {
212 0 : X509V3err(X509V3_F_PROCESS_PCI_VALUE, ERR_R_MALLOC_FAILURE);
213 0 : X509V3_conf_err(val);
214 0 : goto err;
215 : }
216 : }
217 : return 1;
218 : err:
219 0 : if (free_policy) {
220 0 : ASN1_OCTET_STRING_free(*policy);
221 0 : *policy = NULL;
222 : }
223 : return 0;
224 : }
225 :
226 0 : static PROXY_CERT_INFO_EXTENSION *r2i_pci(X509V3_EXT_METHOD *method,
227 : X509V3_CTX *ctx, char *value)
228 : {
229 : PROXY_CERT_INFO_EXTENSION *pci = NULL;
230 : STACK_OF(CONF_VALUE) *vals;
231 0 : ASN1_OBJECT *language = NULL;
232 0 : ASN1_INTEGER *pathlen = NULL;
233 0 : ASN1_OCTET_STRING *policy = NULL;
234 : int i, j;
235 :
236 0 : vals = X509V3_parse_list(value);
237 0 : for (i = 0; i < sk_CONF_VALUE_num(vals); i++) {
238 0 : CONF_VALUE *cnf = sk_CONF_VALUE_value(vals, i);
239 0 : if (!cnf->name || (*cnf->name != '@' && !cnf->value)) {
240 0 : X509V3err(X509V3_F_R2I_PCI,
241 : X509V3_R_INVALID_PROXY_POLICY_SETTING);
242 0 : X509V3_conf_err(cnf);
243 0 : goto err;
244 : }
245 0 : if (*cnf->name == '@') {
246 : STACK_OF(CONF_VALUE) *sect;
247 : int success_p = 1;
248 :
249 0 : sect = X509V3_get_section(ctx, cnf->name + 1);
250 0 : if (!sect) {
251 0 : X509V3err(X509V3_F_R2I_PCI, X509V3_R_INVALID_SECTION);
252 0 : X509V3_conf_err(cnf);
253 0 : goto err;
254 : }
255 0 : for (j = 0; success_p && j < sk_CONF_VALUE_num(sect); j++) {
256 0 : success_p =
257 0 : process_pci_value(sk_CONF_VALUE_value(sect, j),
258 : &language, &pathlen, &policy);
259 : }
260 0 : X509V3_section_free(ctx, sect);
261 0 : if (!success_p)
262 : goto err;
263 : } else {
264 0 : if (!process_pci_value(cnf, &language, &pathlen, &policy)) {
265 0 : X509V3_conf_err(cnf);
266 0 : goto err;
267 : }
268 : }
269 : }
270 :
271 : /* Language is mandatory */
272 0 : if (!language) {
273 0 : X509V3err(X509V3_F_R2I_PCI,
274 : X509V3_R_NO_PROXY_CERT_POLICY_LANGUAGE_DEFINED);
275 0 : goto err;
276 : }
277 0 : i = OBJ_obj2nid(language);
278 0 : if ((i == NID_Independent || i == NID_id_ppl_inheritAll) && policy) {
279 0 : X509V3err(X509V3_F_R2I_PCI,
280 : X509V3_R_POLICY_WHEN_PROXY_LANGUAGE_REQUIRES_NO_POLICY);
281 0 : goto err;
282 : }
283 :
284 0 : pci = PROXY_CERT_INFO_EXTENSION_new();
285 0 : if (!pci) {
286 0 : X509V3err(X509V3_F_R2I_PCI, ERR_R_MALLOC_FAILURE);
287 0 : goto err;
288 : }
289 :
290 0 : pci->proxyPolicy->policyLanguage = language;
291 0 : language = NULL;
292 0 : pci->proxyPolicy->policy = policy;
293 0 : policy = NULL;
294 0 : pci->pcPathLengthConstraint = pathlen;
295 0 : pathlen = NULL;
296 0 : goto end;
297 : err:
298 0 : if (language) {
299 0 : ASN1_OBJECT_free(language);
300 0 : language = NULL;
301 : }
302 0 : if (pathlen) {
303 0 : ASN1_INTEGER_free(pathlen);
304 0 : pathlen = NULL;
305 : }
306 0 : if (policy) {
307 0 : ASN1_OCTET_STRING_free(policy);
308 0 : policy = NULL;
309 : }
310 0 : if (pci) {
311 0 : PROXY_CERT_INFO_EXTENSION_free(pci);
312 : pci = NULL;
313 : }
314 : end:
315 0 : sk_CONF_VALUE_pop_free(vals, X509V3_conf_free);
316 0 : return pci;
317 : }
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