v3_pci.c revision 167613 
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
42static int i2r_pci(X509V3_EXT_METHOD *method, PROXY_CERT_INFO_EXTENSION *ext,
43	BIO *out, int indent);
44static PROXY_CERT_INFO_EXTENSION *r2i_pci(X509V3_EXT_METHOD *method,
45	X509V3_CTX *ctx, char *str);
46
47const 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
57static 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
75static 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;
208err:
209	if (free_policy)
210		{
211		ASN1_OCTET_STRING_free(*policy);
212		*policy = NULL;
213		}
214	return 0;
215	}
216
217static 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;
300err:
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; }
310end:
311	sk_CONF_VALUE_pop_free(vals, X509V3_conf_free);
312	return pci;
313	}
314