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 <string.h>
39
40 #include <openssl/conf.h>
41 #include <openssl/err.h>
42 #include <openssl/mem.h>
43 #include <openssl/obj.h>
44 #include <openssl/x509v3.h>
45
46 #include "../internal.h"
47
48
49 static int i2r_pci(X509V3_EXT_METHOD *method, PROXY_CERT_INFO_EXTENSION *ext,
50 BIO *out, int indent);
51 static PROXY_CERT_INFO_EXTENSION *r2i_pci(X509V3_EXT_METHOD *method,
52 X509V3_CTX *ctx, char *str);
53
54 const X509V3_EXT_METHOD v3_pci =
55 { NID_proxyCertInfo, 0, ASN1_ITEM_ref(PROXY_CERT_INFO_EXTENSION),
56 0, 0, 0, 0,
57 0, 0,
58 NULL, NULL,
59 (X509V3_EXT_I2R)i2r_pci,
60 (X509V3_EXT_R2I)r2i_pci,
61 NULL,
62 };
63
i2r_pci(X509V3_EXT_METHOD * method,PROXY_CERT_INFO_EXTENSION * pci,BIO * out,int indent)64 static int i2r_pci(X509V3_EXT_METHOD *method, PROXY_CERT_INFO_EXTENSION *pci,
65 BIO *out, int indent)
66 {
67 BIO_printf(out, "%*sPath Length Constraint: ", indent, "");
68 if (pci->pcPathLengthConstraint)
69 i2a_ASN1_INTEGER(out, pci->pcPathLengthConstraint);
70 else
71 BIO_printf(out, "infinite");
72 BIO_puts(out, "\n");
73 BIO_printf(out, "%*sPolicy Language: ", indent, "");
74 i2a_ASN1_OBJECT(out, pci->proxyPolicy->policyLanguage);
75 BIO_puts(out, "\n");
76 if (pci->proxyPolicy->policy && pci->proxyPolicy->policy->data)
77 BIO_printf(out, "%*sPolicy Text: %s\n", indent, "",
78 pci->proxyPolicy->policy->data);
79 return 1;
80 }
81
process_pci_value(CONF_VALUE * val,ASN1_OBJECT ** language,ASN1_INTEGER ** pathlen,ASN1_OCTET_STRING ** policy)82 static int process_pci_value(CONF_VALUE *val,
83 ASN1_OBJECT **language, ASN1_INTEGER **pathlen,
84 ASN1_OCTET_STRING **policy)
85 {
86 int free_policy = 0;
87
88 if (strcmp(val->name, "language") == 0) {
89 if (*language) {
90 OPENSSL_PUT_ERROR(X509V3,
91 X509V3_R_POLICY_LANGUAGE_ALREADY_DEFINED);
92 X509V3_conf_err(val);
93 return 0;
94 }
95 if (!(*language = OBJ_txt2obj(val->value, 0))) {
96 OPENSSL_PUT_ERROR(X509V3, X509V3_R_INVALID_OBJECT_IDENTIFIER);
97 X509V3_conf_err(val);
98 return 0;
99 }
100 } else if (strcmp(val->name, "pathlen") == 0) {
101 if (*pathlen) {
102 OPENSSL_PUT_ERROR(X509V3,
103 X509V3_R_POLICY_PATH_LENGTH_ALREADY_DEFINED);
104 X509V3_conf_err(val);
105 return 0;
106 }
107 if (!X509V3_get_value_int(val, pathlen)) {
108 OPENSSL_PUT_ERROR(X509V3, X509V3_R_POLICY_PATH_LENGTH);
109 X509V3_conf_err(val);
110 return 0;
111 }
112 } else if (strcmp(val->name, "policy") == 0) {
113 unsigned char *tmp_data = NULL;
114 long val_len;
115 if (!*policy) {
116 *policy = ASN1_OCTET_STRING_new();
117 if (!*policy) {
118 OPENSSL_PUT_ERROR(X509V3, ERR_R_MALLOC_FAILURE);
119 X509V3_conf_err(val);
120 return 0;
121 }
122 free_policy = 1;
123 }
124 if (strncmp(val->value, "hex:", 4) == 0) {
125 unsigned char *tmp_data2 =
126 string_to_hex(val->value + 4, &val_len);
127
128 if (!tmp_data2) {
129 OPENSSL_PUT_ERROR(X509V3, X509V3_R_ILLEGAL_HEX_DIGIT);
130 X509V3_conf_err(val);
131 goto err;
132 }
133
134 tmp_data = OPENSSL_realloc((*policy)->data,
135 (*policy)->length + val_len + 1);
136 if (tmp_data) {
137 (*policy)->data = tmp_data;
138 OPENSSL_memcpy(&(*policy)->data[(*policy)->length],
139 tmp_data2, val_len);
140 (*policy)->length += val_len;
141 (*policy)->data[(*policy)->length] = '\0';
142 } else {
143 OPENSSL_free(tmp_data2);
144 /*
145 * realloc failure implies the original data space is b0rked
146 * too!
147 */
148 (*policy)->data = NULL;
149 (*policy)->length = 0;
150 OPENSSL_PUT_ERROR(X509V3, ERR_R_MALLOC_FAILURE);
151 X509V3_conf_err(val);
152 goto err;
153 }
154 OPENSSL_free(tmp_data2);
155 } else if (strncmp(val->value, "text:", 5) == 0) {
156 val_len = strlen(val->value + 5);
157 tmp_data = OPENSSL_realloc((*policy)->data,
158 (*policy)->length + val_len + 1);
159 if (tmp_data) {
160 (*policy)->data = tmp_data;
161 OPENSSL_memcpy(&(*policy)->data[(*policy)->length],
162 val->value + 5, val_len);
163 (*policy)->length += val_len;
164 (*policy)->data[(*policy)->length] = '\0';
165 } else {
166 /*
167 * realloc failure implies the original data space is b0rked
168 * too!
169 */
170 (*policy)->data = NULL;
171 (*policy)->length = 0;
172 OPENSSL_PUT_ERROR(X509V3, ERR_R_MALLOC_FAILURE);
173 X509V3_conf_err(val);
174 goto err;
175 }
176 } else {
177 OPENSSL_PUT_ERROR(X509V3, X509V3_R_INCORRECT_POLICY_SYNTAX_TAG);
178 X509V3_conf_err(val);
179 goto err;
180 }
181 if (!tmp_data) {
182 OPENSSL_PUT_ERROR(X509V3, ERR_R_MALLOC_FAILURE);
183 X509V3_conf_err(val);
184 goto err;
185 }
186 }
187 return 1;
188 err:
189 if (free_policy) {
190 ASN1_OCTET_STRING_free(*policy);
191 *policy = NULL;
192 }
193 return 0;
194 }
195
r2i_pci(X509V3_EXT_METHOD * method,X509V3_CTX * ctx,char * value)196 static PROXY_CERT_INFO_EXTENSION *r2i_pci(X509V3_EXT_METHOD *method,
197 X509V3_CTX *ctx, char *value)
198 {
199 PROXY_CERT_INFO_EXTENSION *pci = NULL;
200 STACK_OF(CONF_VALUE) *vals;
201 ASN1_OBJECT *language = NULL;
202 ASN1_INTEGER *pathlen = NULL;
203 ASN1_OCTET_STRING *policy = NULL;
204 size_t i, j;
205 int nid;
206
207 vals = X509V3_parse_list(value);
208 for (i = 0; i < sk_CONF_VALUE_num(vals); i++) {
209 CONF_VALUE *cnf = sk_CONF_VALUE_value(vals, i);
210 if (!cnf->name || (*cnf->name != '@' && !cnf->value)) {
211 OPENSSL_PUT_ERROR(X509V3, X509V3_R_INVALID_PROXY_POLICY_SETTING);
212 X509V3_conf_err(cnf);
213 goto err;
214 }
215 if (*cnf->name == '@') {
216 STACK_OF(CONF_VALUE) *sect;
217 int success_p = 1;
218
219 sect = X509V3_get_section(ctx, cnf->name + 1);
220 if (!sect) {
221 OPENSSL_PUT_ERROR(X509V3, X509V3_R_INVALID_SECTION);
222 X509V3_conf_err(cnf);
223 goto err;
224 }
225 for (j = 0; success_p && j < sk_CONF_VALUE_num(sect); j++) {
226 success_p =
227 process_pci_value(sk_CONF_VALUE_value(sect, j),
228 &language, &pathlen, &policy);
229 }
230 X509V3_section_free(ctx, sect);
231 if (!success_p)
232 goto err;
233 } else {
234 if (!process_pci_value(cnf, &language, &pathlen, &policy)) {
235 X509V3_conf_err(cnf);
236 goto err;
237 }
238 }
239 }
240
241 /* Language is mandatory */
242 if (!language) {
243 OPENSSL_PUT_ERROR(X509V3,
244 X509V3_R_NO_PROXY_CERT_POLICY_LANGUAGE_DEFINED);
245 goto err;
246 }
247 nid = OBJ_obj2nid(language);
248 if ((nid == NID_Independent || nid == NID_id_ppl_inheritAll) && policy) {
249 OPENSSL_PUT_ERROR(X509V3,
250 X509V3_R_POLICY_WHEN_PROXY_LANGUAGE_REQUIRES_NO_POLICY);
251 goto err;
252 }
253
254 pci = PROXY_CERT_INFO_EXTENSION_new();
255 if (!pci) {
256 OPENSSL_PUT_ERROR(X509V3, ERR_R_MALLOC_FAILURE);
257 goto err;
258 }
259
260 pci->proxyPolicy->policyLanguage = language;
261 language = NULL;
262 pci->proxyPolicy->policy = policy;
263 policy = NULL;
264 pci->pcPathLengthConstraint = pathlen;
265 pathlen = NULL;
266 goto end;
267 err:
268 if (language) {
269 ASN1_OBJECT_free(language);
270 language = NULL;
271 }
272 if (pathlen) {
273 ASN1_INTEGER_free(pathlen);
274 pathlen = NULL;
275 }
276 if (policy) {
277 ASN1_OCTET_STRING_free(policy);
278 policy = NULL;
279 }
280 if (pci) {
281 PROXY_CERT_INFO_EXTENSION_free(pci);
282 pci = NULL;
283 }
284 end:
285 sk_CONF_VALUE_pop_free(vals, X509V3_conf_free);
286 return pci;
287 }
288