remove malloc casts
[openssl.git] / crypto / x509v3 / v3_pci.c
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 static int i2r_pci(X509V3_EXT_METHOD *method, PROXY_CERT_INFO_EXTENSION *pci,
59                    BIO *out, int indent)
60 {
61     BIO_printf(out, "%*sPath Length Constraint: ", indent, "");
62     if (pci->pcPathLengthConstraint)
63         i2a_ASN1_INTEGER(out, pci->pcPathLengthConstraint);
64     else
65         BIO_printf(out, "infinite");
66     BIO_puts(out, "\n");
67     BIO_printf(out, "%*sPolicy Language: ", indent, "");
68     i2a_ASN1_OBJECT(out, pci->proxyPolicy->policyLanguage);
69     BIO_puts(out, "\n");
70     if (pci->proxyPolicy->policy && pci->proxyPolicy->policy->data)
71         BIO_printf(out, "%*sPolicy Text: %s\n", indent, "",
72                    pci->proxyPolicy->policy->data);
73     return 1;
74 }
75
76 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     if (strcmp(val->name, "language") == 0) {
83         if (*language) {
84             X509V3err(X509V3_F_PROCESS_PCI_VALUE,
85                       X509V3_R_POLICY_LANGUAGE_ALREADY_DEFINED);
86             X509V3_conf_err(val);
87             return 0;
88         }
89         if (!(*language = OBJ_txt2obj(val->value, 0))) {
90             X509V3err(X509V3_F_PROCESS_PCI_VALUE,
91                       X509V3_R_INVALID_OBJECT_IDENTIFIER);
92             X509V3_conf_err(val);
93             return 0;
94         }
95     } else if (strcmp(val->name, "pathlen") == 0) {
96         if (*pathlen) {
97             X509V3err(X509V3_F_PROCESS_PCI_VALUE,
98                       X509V3_R_POLICY_PATH_LENGTH_ALREADY_DEFINED);
99             X509V3_conf_err(val);
100             return 0;
101         }
102         if (!X509V3_get_value_int(val, pathlen)) {
103             X509V3err(X509V3_F_PROCESS_PCI_VALUE,
104                       X509V3_R_POLICY_PATH_LENGTH);
105             X509V3_conf_err(val);
106             return 0;
107         }
108     } else if (strcmp(val->name, "policy") == 0) {
109         unsigned char *tmp_data = NULL;
110         long val_len;
111         if (!*policy) {
112             *policy = ASN1_OCTET_STRING_new();
113             if (!*policy) {
114                 X509V3err(X509V3_F_PROCESS_PCI_VALUE, ERR_R_MALLOC_FAILURE);
115                 X509V3_conf_err(val);
116                 return 0;
117             }
118             free_policy = 1;
119         }
120         if (strncmp(val->value, "hex:", 4) == 0) {
121             unsigned char *tmp_data2 =
122                 string_to_hex(val->value + 4, &val_len);
123
124             if (!tmp_data2) {
125                 X509V3err(X509V3_F_PROCESS_PCI_VALUE,
126                           X509V3_R_ILLEGAL_HEX_DIGIT);
127                 X509V3_conf_err(val);
128                 goto err;
129             }
130
131             tmp_data = OPENSSL_realloc((*policy)->data,
132                                        (*policy)->length + val_len + 1);
133             if (tmp_data) {
134                 (*policy)->data = tmp_data;
135                 memcpy(&(*policy)->data[(*policy)->length],
136                        tmp_data2, val_len);
137                 (*policy)->length += val_len;
138                 (*policy)->data[(*policy)->length] = '\0';
139             } else {
140                 OPENSSL_free(tmp_data2);
141                 /*
142                  * realloc failure implies the original data space is b0rked
143                  * too!
144                  */
145                 OPENSSL_free((*policy)->data);
146                 (*policy)->data = NULL;
147                 (*policy)->length = 0;
148                 X509V3err(X509V3_F_PROCESS_PCI_VALUE, ERR_R_MALLOC_FAILURE);
149                 X509V3_conf_err(val);
150                 goto err;
151             }
152             OPENSSL_free(tmp_data2);
153         } else if (strncmp(val->value, "file:", 5) == 0) {
154             unsigned char buf[2048];
155             int n;
156             BIO *b = BIO_new_file(val->value + 5, "r");
157             if (!b) {
158                 X509V3err(X509V3_F_PROCESS_PCI_VALUE, ERR_R_BIO_LIB);
159                 X509V3_conf_err(val);
160                 goto err;
161             }
162             while ((n = BIO_read(b, buf, sizeof(buf))) > 0
163                    || (n == 0 && BIO_should_retry(b))) {
164                 if (!n)
165                     continue;
166
167                 tmp_data = OPENSSL_realloc((*policy)->data,
168                                            (*policy)->length + n + 1);
169
170                 if (!tmp_data) {
171                     OPENSSL_free((*policy)->data);
172                     (*policy)->data = NULL;
173                     (*policy)->length = 0;
174                     X509V3err(X509V3_F_PROCESS_PCI_VALUE,
175                               ERR_R_MALLOC_FAILURE);
176                     X509V3_conf_err(val);
177                     BIO_free_all(b);
178                     goto err;
179                 }
180
181                 (*policy)->data = tmp_data;
182                 memcpy(&(*policy)->data[(*policy)->length], buf, n);
183                 (*policy)->length += n;
184                 (*policy)->data[(*policy)->length] = '\0';
185             }
186             BIO_free_all(b);
187
188             if (n < 0) {
189                 X509V3err(X509V3_F_PROCESS_PCI_VALUE, ERR_R_BIO_LIB);
190                 X509V3_conf_err(val);
191                 goto err;
192             }
193         } else if (strncmp(val->value, "text:", 5) == 0) {
194             val_len = strlen(val->value + 5);
195             tmp_data = OPENSSL_realloc((*policy)->data,
196                                        (*policy)->length + val_len + 1);
197             if (tmp_data) {
198                 (*policy)->data = tmp_data;
199                 memcpy(&(*policy)->data[(*policy)->length],
200                        val->value + 5, val_len);
201                 (*policy)->length += val_len;
202                 (*policy)->data[(*policy)->length] = '\0';
203             } else {
204                 /*
205                  * realloc failure implies the original data space is b0rked
206                  * too!
207                  */
208                 OPENSSL_free((*policy)->data);
209                 (*policy)->data = NULL;
210                 (*policy)->length = 0;
211                 X509V3err(X509V3_F_PROCESS_PCI_VALUE, ERR_R_MALLOC_FAILURE);
212                 X509V3_conf_err(val);
213                 goto err;
214             }
215         } else {
216             X509V3err(X509V3_F_PROCESS_PCI_VALUE,
217                       X509V3_R_INCORRECT_POLICY_SYNTAX_TAG);
218             X509V3_conf_err(val);
219             goto err;
220         }
221         if (!tmp_data) {
222             X509V3err(X509V3_F_PROCESS_PCI_VALUE, ERR_R_MALLOC_FAILURE);
223             X509V3_conf_err(val);
224             goto err;
225         }
226     }
227     return 1;
228  err:
229     if (free_policy) {
230         ASN1_OCTET_STRING_free(*policy);
231         *policy = NULL;
232     }
233     return 0;
234 }
235
236 static PROXY_CERT_INFO_EXTENSION *r2i_pci(X509V3_EXT_METHOD *method,
237                                           X509V3_CTX *ctx, char *value)
238 {
239     PROXY_CERT_INFO_EXTENSION *pci = NULL;
240     STACK_OF(CONF_VALUE) *vals;
241     ASN1_OBJECT *language = NULL;
242     ASN1_INTEGER *pathlen = NULL;
243     ASN1_OCTET_STRING *policy = NULL;
244     int i, j;
245
246     vals = X509V3_parse_list(value);
247     for (i = 0; i < sk_CONF_VALUE_num(vals); i++) {
248         CONF_VALUE *cnf = sk_CONF_VALUE_value(vals, i);
249         if (!cnf->name || (*cnf->name != '@' && !cnf->value)) {
250             X509V3err(X509V3_F_R2I_PCI,
251                       X509V3_R_INVALID_PROXY_POLICY_SETTING);
252             X509V3_conf_err(cnf);
253             goto err;
254         }
255         if (*cnf->name == '@') {
256             STACK_OF(CONF_VALUE) *sect;
257             int success_p = 1;
258
259             sect = X509V3_get_section(ctx, cnf->name + 1);
260             if (!sect) {
261                 X509V3err(X509V3_F_R2I_PCI, X509V3_R_INVALID_SECTION);
262                 X509V3_conf_err(cnf);
263                 goto err;
264             }
265             for (j = 0; success_p && j < sk_CONF_VALUE_num(sect); j++) {
266                 success_p =
267                     process_pci_value(sk_CONF_VALUE_value(sect, j),
268                                       &language, &pathlen, &policy);
269             }
270             X509V3_section_free(ctx, sect);
271             if (!success_p)
272                 goto err;
273         } else {
274             if (!process_pci_value(cnf, &language, &pathlen, &policy)) {
275                 X509V3_conf_err(cnf);
276                 goto err;
277             }
278         }
279     }
280
281     /* Language is mandatory */
282     if (!language) {
283         X509V3err(X509V3_F_R2I_PCI,
284                   X509V3_R_NO_PROXY_CERT_POLICY_LANGUAGE_DEFINED);
285         goto err;
286     }
287     i = OBJ_obj2nid(language);
288     if ((i == NID_Independent || i == NID_id_ppl_inheritAll) && policy) {
289         X509V3err(X509V3_F_R2I_PCI,
290                   X509V3_R_POLICY_WHEN_PROXY_LANGUAGE_REQUIRES_NO_POLICY);
291         goto err;
292     }
293
294     pci = PROXY_CERT_INFO_EXTENSION_new();
295     if (!pci) {
296         X509V3err(X509V3_F_R2I_PCI, ERR_R_MALLOC_FAILURE);
297         goto err;
298     }
299
300     pci->proxyPolicy->policyLanguage = language;
301     language = NULL;
302     pci->proxyPolicy->policy = policy;
303     policy = NULL;
304     pci->pcPathLengthConstraint = pathlen;
305     pathlen = NULL;
306     goto end;
307  err:
308     ASN1_OBJECT_free(language);
309     if (pathlen) {
310         ASN1_INTEGER_free(pathlen);
311         pathlen = NULL;
312     }
313     if (policy) {
314         ASN1_OCTET_STRING_free(policy);
315         policy = NULL;
316     }
317     if (pci) {
318         PROXY_CERT_INFO_EXTENSION_free(pci);
319         pci = NULL;
320     }
321  end:
322     sk_CONF_VALUE_pop_free(vals, X509V3_conf_free);
323     return pci;
324 }