1/* crypto/x509/x509_att.c */
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 <openssl/stack.h>
61#include "cryptlib.h"
62#include <openssl/asn1.h>
63#include <openssl/objects.h>
64#include <openssl/evp.h>
65#include <openssl/x509.h>
66#include <openssl/x509v3.h>
67
68int X509at_get_attr_count(const STACK_OF(X509_ATTRIBUTE) *x)
69{
70	return sk_X509_ATTRIBUTE_num(x);
71}
72
73int X509at_get_attr_by_NID(const STACK_OF(X509_ATTRIBUTE) *x, int nid,
74			  int lastpos)
75{
76	ASN1_OBJECT *obj;
77
78	obj=OBJ_nid2obj(nid);
79	if (obj == NULL) return(-2);
80	return(X509at_get_attr_by_OBJ(x,obj,lastpos));
81}
82
83int X509at_get_attr_by_OBJ(const STACK_OF(X509_ATTRIBUTE) *sk, ASN1_OBJECT *obj,
84			  int lastpos)
85{
86	int n;
87	X509_ATTRIBUTE *ex;
88
89	if (sk == NULL) return(-1);
90	lastpos++;
91	if (lastpos < 0)
92		lastpos=0;
93	n=sk_X509_ATTRIBUTE_num(sk);
94	for ( ; lastpos < n; lastpos++)
95		{
96		ex=sk_X509_ATTRIBUTE_value(sk,lastpos);
97		if (OBJ_cmp(ex->object,obj) == 0)
98			return(lastpos);
99		}
100	return(-1);
101}
102
103X509_ATTRIBUTE *X509at_get_attr(const STACK_OF(X509_ATTRIBUTE) *x, int loc)
104{
105	if (x == NULL || sk_X509_ATTRIBUTE_num(x) <= loc || loc < 0)
106		return NULL;
107	else
108		return sk_X509_ATTRIBUTE_value(x,loc);
109}
110
111X509_ATTRIBUTE *X509at_delete_attr(STACK_OF(X509_ATTRIBUTE) *x, int loc)
112{
113	X509_ATTRIBUTE *ret;
114
115	if (x == NULL || sk_X509_ATTRIBUTE_num(x) <= loc || loc < 0)
116		return(NULL);
117	ret=sk_X509_ATTRIBUTE_delete(x,loc);
118	return(ret);
119}
120
121STACK_OF(X509_ATTRIBUTE) *X509at_add1_attr(STACK_OF(X509_ATTRIBUTE) **x,
122					 X509_ATTRIBUTE *attr)
123{
124	X509_ATTRIBUTE *new_attr=NULL;
125	STACK_OF(X509_ATTRIBUTE) *sk=NULL;
126
127	if (x == NULL)
128		{
129		X509err(X509_F_X509AT_ADD1_ATTR, ERR_R_PASSED_NULL_PARAMETER);
130		goto err2;
131		}
132
133	if (*x == NULL)
134		{
135		if ((sk=sk_X509_ATTRIBUTE_new_null()) == NULL)
136			goto err;
137		}
138	else
139		sk= *x;
140
141	if ((new_attr=X509_ATTRIBUTE_dup(attr)) == NULL)
142		goto err2;
143	if (!sk_X509_ATTRIBUTE_push(sk,new_attr))
144		goto err;
145	if (*x == NULL)
146		*x=sk;
147	return(sk);
148err:
149	X509err(X509_F_X509AT_ADD1_ATTR,ERR_R_MALLOC_FAILURE);
150err2:
151	if (new_attr != NULL) X509_ATTRIBUTE_free(new_attr);
152	if (sk != NULL) sk_X509_ATTRIBUTE_free(sk);
153	return(NULL);
154}
155
156STACK_OF(X509_ATTRIBUTE) *X509at_add1_attr_by_OBJ(STACK_OF(X509_ATTRIBUTE) **x,
157			const ASN1_OBJECT *obj, int type,
158			const unsigned char *bytes, int len)
159{
160	X509_ATTRIBUTE *attr;
161	STACK_OF(X509_ATTRIBUTE) *ret;
162	attr = X509_ATTRIBUTE_create_by_OBJ(NULL, obj, type, bytes, len);
163	if(!attr) return 0;
164	ret = X509at_add1_attr(x, attr);
165	X509_ATTRIBUTE_free(attr);
166	return ret;
167}
168
169STACK_OF(X509_ATTRIBUTE) *X509at_add1_attr_by_NID(STACK_OF(X509_ATTRIBUTE) **x,
170			int nid, int type,
171			const unsigned char *bytes, int len)
172{
173	X509_ATTRIBUTE *attr;
174	STACK_OF(X509_ATTRIBUTE) *ret;
175	attr = X509_ATTRIBUTE_create_by_NID(NULL, nid, type, bytes, len);
176	if(!attr) return 0;
177	ret = X509at_add1_attr(x, attr);
178	X509_ATTRIBUTE_free(attr);
179	return ret;
180}
181
182STACK_OF(X509_ATTRIBUTE) *X509at_add1_attr_by_txt(STACK_OF(X509_ATTRIBUTE) **x,
183			const char *attrname, int type,
184			const unsigned char *bytes, int len)
185{
186	X509_ATTRIBUTE *attr;
187	STACK_OF(X509_ATTRIBUTE) *ret;
188	attr = X509_ATTRIBUTE_create_by_txt(NULL, attrname, type, bytes, len);
189	if(!attr) return 0;
190	ret = X509at_add1_attr(x, attr);
191	X509_ATTRIBUTE_free(attr);
192	return ret;
193}
194
195void *X509at_get0_data_by_OBJ(STACK_OF(X509_ATTRIBUTE) *x,
196				ASN1_OBJECT *obj, int lastpos, int type)
197{
198	int i;
199	X509_ATTRIBUTE *at;
200	i = X509at_get_attr_by_OBJ(x, obj, lastpos);
201	if (i == -1)
202		return NULL;
203	if ((lastpos <= -2) && (X509at_get_attr_by_OBJ(x, obj, i) != -1))
204		return NULL;
205	at = X509at_get_attr(x, i);
206	if (lastpos <= -3 && (X509_ATTRIBUTE_count(at) != 1))
207		return NULL;
208	return X509_ATTRIBUTE_get0_data(at, 0, type, NULL);
209}
210
211X509_ATTRIBUTE *X509_ATTRIBUTE_create_by_NID(X509_ATTRIBUTE **attr, int nid,
212	     int atrtype, const void *data, int len)
213{
214	ASN1_OBJECT *obj;
215	X509_ATTRIBUTE *ret;
216
217	obj=OBJ_nid2obj(nid);
218	if (obj == NULL)
219		{
220		X509err(X509_F_X509_ATTRIBUTE_CREATE_BY_NID,X509_R_UNKNOWN_NID);
221		return(NULL);
222		}
223	ret=X509_ATTRIBUTE_create_by_OBJ(attr,obj,atrtype,data,len);
224	if (ret == NULL) ASN1_OBJECT_free(obj);
225	return(ret);
226}
227
228X509_ATTRIBUTE *X509_ATTRIBUTE_create_by_OBJ(X509_ATTRIBUTE **attr,
229	     const ASN1_OBJECT *obj, int atrtype, const void *data, int len)
230{
231	X509_ATTRIBUTE *ret;
232
233	if ((attr == NULL) || (*attr == NULL))
234		{
235		if ((ret=X509_ATTRIBUTE_new()) == NULL)
236			{
237			X509err(X509_F_X509_ATTRIBUTE_CREATE_BY_OBJ,ERR_R_MALLOC_FAILURE);
238			return(NULL);
239			}
240		}
241	else
242		ret= *attr;
243
244	if (!X509_ATTRIBUTE_set1_object(ret,obj))
245		goto err;
246	if (!X509_ATTRIBUTE_set1_data(ret,atrtype,data,len))
247		goto err;
248
249	if ((attr != NULL) && (*attr == NULL)) *attr=ret;
250	return(ret);
251err:
252	if ((attr == NULL) || (ret != *attr))
253		X509_ATTRIBUTE_free(ret);
254	return(NULL);
255}
256
257X509_ATTRIBUTE *X509_ATTRIBUTE_create_by_txt(X509_ATTRIBUTE **attr,
258		const char *atrname, int type, const unsigned char *bytes, int len)
259	{
260	ASN1_OBJECT *obj;
261	X509_ATTRIBUTE *nattr;
262
263	obj=OBJ_txt2obj(atrname, 0);
264	if (obj == NULL)
265		{
266		X509err(X509_F_X509_ATTRIBUTE_CREATE_BY_TXT,
267						X509_R_INVALID_FIELD_NAME);
268		ERR_add_error_data(2, "name=", atrname);
269		return(NULL);
270		}
271	nattr = X509_ATTRIBUTE_create_by_OBJ(attr,obj,type,bytes,len);
272	ASN1_OBJECT_free(obj);
273	return nattr;
274	}
275
276int X509_ATTRIBUTE_set1_object(X509_ATTRIBUTE *attr, const ASN1_OBJECT *obj)
277{
278	if ((attr == NULL) || (obj == NULL))
279		return(0);
280	ASN1_OBJECT_free(attr->object);
281	attr->object=OBJ_dup(obj);
282	return(1);
283}
284
285int X509_ATTRIBUTE_set1_data(X509_ATTRIBUTE *attr, int attrtype, const void *data, int len)
286{
287	ASN1_TYPE *ttmp;
288	ASN1_STRING *stmp = NULL;
289	int atype = 0;
290	if (!attr) return 0;
291	if(attrtype & MBSTRING_FLAG) {
292		stmp = ASN1_STRING_set_by_NID(NULL, data, len, attrtype,
293						OBJ_obj2nid(attr->object));
294		if(!stmp) {
295			X509err(X509_F_X509_ATTRIBUTE_SET1_DATA, ERR_R_ASN1_LIB);
296			return 0;
297		}
298		atype = stmp->type;
299	} else if (len != -1){
300		if(!(stmp = ASN1_STRING_type_new(attrtype))) goto err;
301		if(!ASN1_STRING_set(stmp, data, len)) goto err;
302		atype = attrtype;
303	}
304	if(!(attr->value.set = sk_ASN1_TYPE_new_null())) goto err;
305	attr->single = 0;
306	/* This is a bit naughty because the attribute should really have
307	 * at least one value but some types use and zero length SET and
308	 * require this.
309	 */
310	if (attrtype == 0)
311		return 1;
312	if(!(ttmp = ASN1_TYPE_new())) goto err;
313	if ((len == -1) && !(attrtype & MBSTRING_FLAG))
314		{
315		if (!ASN1_TYPE_set1(ttmp, attrtype, data))
316			goto err;
317		}
318	else
319		ASN1_TYPE_set(ttmp, atype, stmp);
320	if(!sk_ASN1_TYPE_push(attr->value.set, ttmp)) goto err;
321	return 1;
322	err:
323	X509err(X509_F_X509_ATTRIBUTE_SET1_DATA, ERR_R_MALLOC_FAILURE);
324	return 0;
325}
326
327int X509_ATTRIBUTE_count(X509_ATTRIBUTE *attr)
328{
329	if(!attr->single) return sk_ASN1_TYPE_num(attr->value.set);
330	if(attr->value.single) return 1;
331	return 0;
332}
333
334ASN1_OBJECT *X509_ATTRIBUTE_get0_object(X509_ATTRIBUTE *attr)
335{
336	if (attr == NULL) return(NULL);
337	return(attr->object);
338}
339
340void *X509_ATTRIBUTE_get0_data(X509_ATTRIBUTE *attr, int idx,
341					int atrtype, void *data)
342{
343	ASN1_TYPE *ttmp;
344	ttmp = X509_ATTRIBUTE_get0_type(attr, idx);
345	if(!ttmp) return NULL;
346	if(atrtype != ASN1_TYPE_get(ttmp)){
347		X509err(X509_F_X509_ATTRIBUTE_GET0_DATA, X509_R_WRONG_TYPE);
348		return NULL;
349	}
350	return ttmp->value.ptr;
351}
352
353ASN1_TYPE *X509_ATTRIBUTE_get0_type(X509_ATTRIBUTE *attr, int idx)
354{
355	if (attr == NULL) return(NULL);
356	if(idx >= X509_ATTRIBUTE_count(attr)) return NULL;
357	if(!attr->single) return sk_ASN1_TYPE_value(attr->value.set, idx);
358	else return attr->value.single;
359}
360