x509name.c revision 1.14 
1/* $OpenBSD: x509name.c,v 1.14 2017/01/29 17:49:23 beck Exp $ */
2/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 * All rights reserved.
4 *
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
8 *
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to.  The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 *
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
22 *
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
25 * are met:
26 * 1. Redistributions of source code must retain the copyright
27 *    notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 *    notice, this list of conditions and the following disclaimer in the
30 *    documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 *    must display the following acknowledgement:
33 *    "This product includes cryptographic software written by
34 *     Eric Young (eay@cryptsoft.com)"
35 *    The word 'cryptographic' can be left out if the rouines from the library
36 *    being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 *    the apps directory (application code) you must include an acknowledgement:
39 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 *
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51 * SUCH DAMAGE.
52 *
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed.  i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
57 */
58
59#include <stdio.h>
60#include <string.h>
61
62#include <openssl/asn1.h>
63#include <openssl/err.h>
64#include <openssl/evp.h>
65#include <openssl/objects.h>
66#include <openssl/stack.h>
67#include <openssl/x509.h>
68
69int
70X509_NAME_get_text_by_NID(X509_NAME *name, int nid, char *buf, int len)
71{
72	ASN1_OBJECT *obj;
73
74	obj = OBJ_nid2obj(nid);
75	if (obj == NULL)
76		return (-1);
77	return (X509_NAME_get_text_by_OBJ(name, obj, buf, len));
78}
79
80int
81X509_NAME_get_text_by_OBJ(X509_NAME *name, ASN1_OBJECT *obj, char *buf,
82    int len)
83{
84	int i;
85	ASN1_STRING *data;
86
87	i = X509_NAME_get_index_by_OBJ(name, obj, -1);
88	if (i < 0)
89		return (-1);
90	data = X509_NAME_ENTRY_get_data(X509_NAME_get_entry(name, i));
91	i = (data->length > (len - 1)) ? (len - 1) : data->length;
92	if (buf == NULL)
93		return (data->length);
94	if (i >= 0) {
95		memcpy(buf, data->data, i);
96		buf[i] = '\0';
97	}
98	return (i);
99}
100
101int
102X509_NAME_entry_count(X509_NAME *name)
103{
104	if (name == NULL)
105		return (0);
106	return (sk_X509_NAME_ENTRY_num(name->entries));
107}
108
109int
110X509_NAME_get_index_by_NID(X509_NAME *name, int nid, int lastpos)
111{
112	ASN1_OBJECT *obj;
113
114	obj = OBJ_nid2obj(nid);
115	if (obj == NULL)
116		return (-2);
117	return (X509_NAME_get_index_by_OBJ(name, obj, lastpos));
118}
119
120/* NOTE: you should be passsing -1, not 0 as lastpos */
121int
122X509_NAME_get_index_by_OBJ(X509_NAME *name, ASN1_OBJECT *obj, int lastpos)
123{
124	int n;
125	X509_NAME_ENTRY *ne;
126	STACK_OF(X509_NAME_ENTRY) *sk;
127
128	if (name == NULL)
129		return (-1);
130	if (lastpos < 0)
131		lastpos = -1;
132	sk = name->entries;
133	n = sk_X509_NAME_ENTRY_num(sk);
134	for (lastpos++; lastpos < n; lastpos++) {
135		ne = sk_X509_NAME_ENTRY_value(sk, lastpos);
136		if (OBJ_cmp(ne->object, obj) == 0)
137			return (lastpos);
138	}
139	return (-1);
140}
141
142X509_NAME_ENTRY *
143X509_NAME_get_entry(X509_NAME *name, int loc)
144{
145	if (name == NULL || sk_X509_NAME_ENTRY_num(name->entries) <= loc ||
146	    loc < 0)
147		return (NULL);
148	else
149		return (sk_X509_NAME_ENTRY_value(name->entries, loc));
150}
151
152X509_NAME_ENTRY *
153X509_NAME_delete_entry(X509_NAME *name, int loc)
154{
155	X509_NAME_ENTRY *ret;
156	int i, n, set_prev, set_next;
157	STACK_OF(X509_NAME_ENTRY) *sk;
158
159	if (name == NULL || sk_X509_NAME_ENTRY_num(name->entries) <= loc ||
160	    loc < 0)
161		return (NULL);
162	sk = name->entries;
163	ret = sk_X509_NAME_ENTRY_delete(sk, loc);
164	n = sk_X509_NAME_ENTRY_num(sk);
165	name->modified = 1;
166	if (loc == n)
167		return (ret);
168
169	/* else we need to fixup the set field */
170	if (loc != 0)
171		set_prev = (sk_X509_NAME_ENTRY_value(sk, loc - 1))->set;
172	else
173		set_prev = ret->set - 1;
174	set_next = sk_X509_NAME_ENTRY_value(sk, loc)->set;
175
176	/* set_prev is the previous set
177	 * set is the current set
178	 * set_next is the following
179	 * prev  1 1	1 1	1 1	1 1
180	 * set   1	1	2	2
181	 * next  1 1	2 2	2 2	3 2
182	 * so basically only if prev and next differ by 2, then
183	 * re-number down by 1 */
184	if (set_prev + 1 < set_next)
185		for (i = loc; i < n; i++)
186			sk_X509_NAME_ENTRY_value(sk, i)->set--;
187	return (ret);
188}
189
190int
191X509_NAME_add_entry_by_OBJ(X509_NAME *name, ASN1_OBJECT *obj, int type,
192    unsigned char *bytes, int len, int loc, int set)
193{
194	X509_NAME_ENTRY *ne;
195	int ret;
196
197	ne = X509_NAME_ENTRY_create_by_OBJ(NULL, obj, type, bytes, len);
198	if (!ne)
199		return 0;
200	ret = X509_NAME_add_entry(name, ne, loc, set);
201	X509_NAME_ENTRY_free(ne);
202	return ret;
203}
204
205int
206X509_NAME_add_entry_by_NID(X509_NAME *name, int nid, int type,
207    unsigned char *bytes, int len, int loc, int set)
208{
209	X509_NAME_ENTRY *ne;
210	int ret;
211
212	ne = X509_NAME_ENTRY_create_by_NID(NULL, nid, type, bytes, len);
213	if (!ne)
214		return 0;
215	ret = X509_NAME_add_entry(name, ne, loc, set);
216	X509_NAME_ENTRY_free(ne);
217	return ret;
218}
219
220int
221X509_NAME_add_entry_by_txt(X509_NAME *name, const char *field, int type,
222    const unsigned char *bytes, int len, int loc, int set)
223{
224	X509_NAME_ENTRY *ne;
225	int ret;
226
227	ne = X509_NAME_ENTRY_create_by_txt(NULL, field, type, bytes, len);
228	if (!ne)
229		return 0;
230	ret = X509_NAME_add_entry(name, ne, loc, set);
231	X509_NAME_ENTRY_free(ne);
232	return ret;
233}
234
235/* if set is -1, append to previous set, 0 'a new one', and 1,
236 * prepend to the guy we are about to stomp on. */
237int
238X509_NAME_add_entry(X509_NAME *name, X509_NAME_ENTRY *ne, int loc, int set)
239{
240	X509_NAME_ENTRY *new_name = NULL;
241	int n, i, inc;
242	STACK_OF(X509_NAME_ENTRY) *sk;
243
244	if (name == NULL)
245		return (0);
246	sk = name->entries;
247	n = sk_X509_NAME_ENTRY_num(sk);
248	if (loc > n)
249		loc = n;
250	else if (loc < 0)
251		loc = n;
252
253	name->modified = 1;
254
255	if (set == -1) {
256		if (loc == 0) {
257			set = 0;
258			inc = 1;
259		} else {
260			set = sk_X509_NAME_ENTRY_value(sk, loc - 1)->set;
261			inc = 0;
262		}
263	} else /* if (set >= 0) */ {
264		if (loc >= n) {
265			if (loc != 0)
266				set = sk_X509_NAME_ENTRY_value(sk, loc - 1)->set + 1;
267			else
268				set = 0;
269		} else
270			set = sk_X509_NAME_ENTRY_value(sk, loc)->set;
271		inc = (set == 0) ? 1 : 0;
272	}
273
274	if ((new_name = X509_NAME_ENTRY_dup(ne)) == NULL)
275		goto err;
276	new_name->set = set;
277	if (!sk_X509_NAME_ENTRY_insert(sk, new_name, loc)) {
278		X509error(ERR_R_MALLOC_FAILURE);
279		goto err;
280	}
281	if (inc) {
282		n = sk_X509_NAME_ENTRY_num(sk);
283		for (i = loc + 1; i < n; i++)
284			sk_X509_NAME_ENTRY_value(sk, i - 1)->set += 1;
285	}
286	return (1);
287
288err:
289	if (new_name != NULL)
290		X509_NAME_ENTRY_free(new_name);
291	return (0);
292}
293
294X509_NAME_ENTRY *
295X509_NAME_ENTRY_create_by_txt(X509_NAME_ENTRY **ne,
296    const char *field, int type, const unsigned char *bytes, int len)
297{
298	ASN1_OBJECT *obj;
299	X509_NAME_ENTRY *nentry;
300
301	obj = OBJ_txt2obj(field, 0);
302	if (obj == NULL) {
303		X509error(X509_R_INVALID_FIELD_NAME);
304		ERR_asprintf_error_data("name=%s", field);
305		return (NULL);
306	}
307	nentry = X509_NAME_ENTRY_create_by_OBJ(ne, obj, type, bytes, len);
308	ASN1_OBJECT_free(obj);
309	return nentry;
310}
311
312X509_NAME_ENTRY *
313X509_NAME_ENTRY_create_by_NID(X509_NAME_ENTRY **ne, int nid, int type,
314    unsigned char *bytes, int len)
315{
316	ASN1_OBJECT *obj;
317	X509_NAME_ENTRY *nentry;
318
319	obj = OBJ_nid2obj(nid);
320	if (obj == NULL) {
321		X509error(X509_R_UNKNOWN_NID);
322		return (NULL);
323	}
324	nentry = X509_NAME_ENTRY_create_by_OBJ(ne, obj, type, bytes, len);
325	ASN1_OBJECT_free(obj);
326	return nentry;
327}
328
329X509_NAME_ENTRY *
330X509_NAME_ENTRY_create_by_OBJ(X509_NAME_ENTRY **ne, ASN1_OBJECT *obj, int type,
331    const unsigned char *bytes, int len)
332{
333	X509_NAME_ENTRY *ret;
334
335	if ((ne == NULL) || (*ne == NULL)) {
336		if ((ret = X509_NAME_ENTRY_new()) == NULL)
337			return (NULL);
338	} else
339		ret= *ne;
340
341	if (!X509_NAME_ENTRY_set_object(ret, obj))
342		goto err;
343	if (!X509_NAME_ENTRY_set_data(ret, type, bytes, len))
344		goto err;
345
346	if ((ne != NULL) && (*ne == NULL))
347		*ne = ret;
348	return (ret);
349
350err:
351	if ((ne == NULL) || (ret != *ne))
352		X509_NAME_ENTRY_free(ret);
353	return (NULL);
354}
355
356int
357X509_NAME_ENTRY_set_object(X509_NAME_ENTRY *ne, ASN1_OBJECT *obj)
358{
359	if ((ne == NULL) || (obj == NULL)) {
360		X509error(ERR_R_PASSED_NULL_PARAMETER);
361		return (0);
362	}
363	ASN1_OBJECT_free(ne->object);
364	ne->object = OBJ_dup(obj);
365	return ((ne->object == NULL) ? 0 : 1);
366}
367
368int
369X509_NAME_ENTRY_set_data(X509_NAME_ENTRY *ne, int type,
370    const unsigned char *bytes, int len)
371{
372	int i;
373
374	if ((ne == NULL) || ((bytes == NULL) && (len != 0)))
375		return (0);
376	if ((type > 0) && (type & MBSTRING_FLAG))
377		return ASN1_STRING_set_by_NID(&ne->value, bytes, len, type,
378		    OBJ_obj2nid(ne->object)) ? 1 : 0;
379	if (len < 0)
380		len = strlen((const char *)bytes);
381	i = ASN1_STRING_set(ne->value, bytes, len);
382	if (!i)
383		return (0);
384	if (type != V_ASN1_UNDEF) {
385		if (type == V_ASN1_APP_CHOOSE)
386			ne->value->type = ASN1_PRINTABLE_type(bytes, len);
387		else
388			ne->value->type = type;
389	}
390	return (1);
391}
392
393ASN1_OBJECT *
394X509_NAME_ENTRY_get_object(X509_NAME_ENTRY *ne)
395{
396	if (ne == NULL)
397		return (NULL);
398	return (ne->object);
399}
400
401ASN1_STRING *
402X509_NAME_ENTRY_get_data(X509_NAME_ENTRY *ne)
403{
404	if (ne == NULL)
405		return (NULL);
406	return (ne->value);
407}
408