v3_pci.c revision 215697 
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)
132				{
133				X509V3err(X509V3_F_PROCESS_PCI_VALUE,X509V3_R_ILLEGAL_HEX_DIGIT);
134				X509V3_conf_err(val);
135				goto err;
136				}
137
138			tmp_data = OPENSSL_realloc((*policy)->data,
139				(*policy)->length + val_len + 1);
140			if (tmp_data)
141				{
142				(*policy)->data = tmp_data;
143				memcpy(&(*policy)->data[(*policy)->length],
144					tmp_data2, val_len);
145				(*policy)->length += val_len;
146				(*policy)->data[(*policy)->length] = '\0';
147				}
148			else
149				{
150				OPENSSL_free(tmp_data2);
151				/* realloc failure implies the original data space is b0rked too! */
152				(*policy)->data = NULL;
153				(*policy)->length = 0;
154				X509V3err(X509V3_F_PROCESS_PCI_VALUE,ERR_R_MALLOC_FAILURE);
155				X509V3_conf_err(val);
156				goto err;
157				}
158			OPENSSL_free(tmp_data2);
159			}
160		else if (strncmp(val->value, "file:", 5) == 0)
161			{
162			unsigned char buf[2048];
163			int n;
164			BIO *b = BIO_new_file(val->value + 5, "r");
165			if (!b)
166				{
167				X509V3err(X509V3_F_PROCESS_PCI_VALUE,ERR_R_BIO_LIB);
168				X509V3_conf_err(val);
169				goto err;
170				}
171			while((n = BIO_read(b, buf, sizeof(buf))) > 0
172				|| (n == 0 && BIO_should_retry(b)))
173				{
174				if (!n) continue;
175
176				tmp_data = OPENSSL_realloc((*policy)->data,
177					(*policy)->length + n + 1);
178
179				if (!tmp_data)
180					break;
181
182				(*policy)->data = tmp_data;
183				memcpy(&(*policy)->data[(*policy)->length],
184					buf, n);
185				(*policy)->length += n;
186				(*policy)->data[(*policy)->length] = '\0';
187				}
188			BIO_free_all(b);
189
190			if (n < 0)
191				{
192				X509V3err(X509V3_F_PROCESS_PCI_VALUE,ERR_R_BIO_LIB);
193				X509V3_conf_err(val);
194				goto err;
195				}
196			}
197		else if (strncmp(val->value, "text:", 5) == 0)
198			{
199			val_len = strlen(val->value + 5);
200			tmp_data = OPENSSL_realloc((*policy)->data,
201				(*policy)->length + val_len + 1);
202			if (tmp_data)
203				{
204				(*policy)->data = tmp_data;
205				memcpy(&(*policy)->data[(*policy)->length],
206					val->value + 5, val_len);
207				(*policy)->length += val_len;
208				(*policy)->data[(*policy)->length] = '\0';
209				}
210			else
211				{
212				/* realloc failure implies the original data space is b0rked too! */
213				(*policy)->data = NULL;
214				(*policy)->length = 0;
215				X509V3err(X509V3_F_PROCESS_PCI_VALUE,ERR_R_MALLOC_FAILURE);
216				X509V3_conf_err(val);
217				goto err;
218				}
219			}
220		else
221			{
222			X509V3err(X509V3_F_PROCESS_PCI_VALUE,X509V3_R_INCORRECT_POLICY_SYNTAX_TAG);
223			X509V3_conf_err(val);
224			goto err;
225			}
226		if (!tmp_data)
227			{
228			X509V3err(X509V3_F_PROCESS_PCI_VALUE,ERR_R_MALLOC_FAILURE);
229			X509V3_conf_err(val);
230			goto err;
231			}
232		}
233	return 1;
234err:
235	if (free_policy)
236		{
237		ASN1_OCTET_STRING_free(*policy);
238		*policy = NULL;
239		}
240	return 0;
241	}
242
243static PROXY_CERT_INFO_EXTENSION *r2i_pci(X509V3_EXT_METHOD *method,
244	X509V3_CTX *ctx, char *value)
245	{
246	PROXY_CERT_INFO_EXTENSION *pci = NULL;
247	STACK_OF(CONF_VALUE) *vals;
248	ASN1_OBJECT *language = NULL;
249	ASN1_INTEGER *pathlen = NULL;
250	ASN1_OCTET_STRING *policy = NULL;
251	int i, j;
252
253	vals = X509V3_parse_list(value);
254	for (i = 0; i < sk_CONF_VALUE_num(vals); i++)
255		{
256		CONF_VALUE *cnf = sk_CONF_VALUE_value(vals, i);
257		if (!cnf->name || (*cnf->name != '@' && !cnf->value))
258			{
259			X509V3err(X509V3_F_R2I_PCI,X509V3_R_INVALID_PROXY_POLICY_SETTING);
260			X509V3_conf_err(cnf);
261			goto err;
262			}
263		if (*cnf->name == '@')
264			{
265			STACK_OF(CONF_VALUE) *sect;
266			int success_p = 1;
267
268			sect = X509V3_get_section(ctx, cnf->name + 1);
269			if (!sect)
270				{
271				X509V3err(X509V3_F_R2I_PCI,X509V3_R_INVALID_SECTION);
272				X509V3_conf_err(cnf);
273				goto err;
274				}
275			for (j = 0; success_p && j < sk_CONF_VALUE_num(sect); j++)
276				{
277				success_p =
278					process_pci_value(sk_CONF_VALUE_value(sect, j),
279						&language, &pathlen, &policy);
280				}
281			X509V3_section_free(ctx, sect);
282			if (!success_p)
283				goto err;
284			}
285		else
286			{
287			if (!process_pci_value(cnf,
288					&language, &pathlen, &policy))
289				{
290				X509V3_conf_err(cnf);
291				goto err;
292				}
293			}
294		}
295
296	/* Language is mandatory */
297	if (!language)
298		{
299		X509V3err(X509V3_F_R2I_PCI,X509V3_R_NO_PROXY_CERT_POLICY_LANGUAGE_DEFINED);
300		goto err;
301		}
302	i = OBJ_obj2nid(language);
303	if ((i == NID_Independent || i == NID_id_ppl_inheritAll) && policy)
304		{
305		X509V3err(X509V3_F_R2I_PCI,X509V3_R_POLICY_WHEN_PROXY_LANGUAGE_REQUIRES_NO_POLICY);
306		goto err;
307		}
308
309	pci = PROXY_CERT_INFO_EXTENSION_new();
310	if (!pci)
311		{
312		X509V3err(X509V3_F_R2I_PCI,ERR_R_MALLOC_FAILURE);
313		goto err;
314		}
315
316	pci->proxyPolicy->policyLanguage = language; language = NULL;
317	pci->proxyPolicy->policy = policy; policy = NULL;
318	pci->pcPathLengthConstraint = pathlen; pathlen = NULL;
319	goto end;
320err:
321	if (language) { ASN1_OBJECT_free(language); language = NULL; }
322	if (pathlen) { ASN1_INTEGER_free(pathlen); pathlen = NULL; }
323	if (policy) { ASN1_OCTET_STRING_free(policy); policy = NULL; }
324	if (pci) { PROXY_CERT_INFO_EXTENSION_free(pci); pci = NULL; }
325end:
326	sk_CONF_VALUE_pop_free(vals, X509V3_conf_free);
327	return pci;
328	}
329