1/* crypto/asn1/x_name.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 "cryptlib.h"
61#include <openssl/asn1t.h>
62#include <openssl/x509.h>
63
64static int x509_name_ex_d2i(ASN1_VALUE **val, const unsigned char **in, long len, const ASN1_ITEM *it,
65					int tag, int aclass, char opt, ASN1_TLC *ctx);
66
67static int x509_name_ex_i2d(ASN1_VALUE **val, unsigned char **out, const ASN1_ITEM *it, int tag, int aclass);
68static int x509_name_ex_new(ASN1_VALUE **val, const ASN1_ITEM *it);
69static void x509_name_ex_free(ASN1_VALUE **val, const ASN1_ITEM *it);
70
71static int x509_name_encode(X509_NAME *a);
72
73ASN1_SEQUENCE(X509_NAME_ENTRY) = {
74	ASN1_SIMPLE(X509_NAME_ENTRY, object, ASN1_OBJECT),
75	ASN1_SIMPLE(X509_NAME_ENTRY, value, ASN1_PRINTABLE)
76} ASN1_SEQUENCE_END(X509_NAME_ENTRY)
77
78IMPLEMENT_ASN1_FUNCTIONS(X509_NAME_ENTRY)
79IMPLEMENT_ASN1_DUP_FUNCTION(X509_NAME_ENTRY)
80
81/* For the "Name" type we need a SEQUENCE OF { SET OF X509_NAME_ENTRY }
82 * so declare two template wrappers for this
83 */
84
85ASN1_ITEM_TEMPLATE(X509_NAME_ENTRIES) =
86	ASN1_EX_TEMPLATE_TYPE(ASN1_TFLG_SET_OF, 0, RDNS, X509_NAME_ENTRY)
87ASN1_ITEM_TEMPLATE_END(X509_NAME_ENTRIES)
88
89ASN1_ITEM_TEMPLATE(X509_NAME_INTERNAL) =
90	ASN1_EX_TEMPLATE_TYPE(ASN1_TFLG_SEQUENCE_OF, 0, Name, X509_NAME_ENTRIES)
91ASN1_ITEM_TEMPLATE_END(X509_NAME_INTERNAL)
92
93/* Normally that's where it would end: we'd have two nested STACK structures
94 * representing the ASN1. Unfortunately X509_NAME uses a completely different
95 * form and caches encodings so we have to process the internal form and convert
96 * to the external form.
97 */
98
99const ASN1_EXTERN_FUNCS x509_name_ff = {
100	NULL,
101	x509_name_ex_new,
102	x509_name_ex_free,
103	0,	/* Default clear behaviour is OK */
104	x509_name_ex_d2i,
105	x509_name_ex_i2d
106};
107
108IMPLEMENT_EXTERN_ASN1(X509_NAME, V_ASN1_SEQUENCE, x509_name_ff)
109
110IMPLEMENT_ASN1_FUNCTIONS(X509_NAME)
111IMPLEMENT_ASN1_DUP_FUNCTION(X509_NAME)
112
113static int x509_name_ex_new(ASN1_VALUE **val, const ASN1_ITEM *it)
114{
115	X509_NAME *ret = NULL;
116	ret = OPENSSL_malloc(sizeof(X509_NAME));
117	if(!ret) goto memerr;
118	if ((ret->entries=sk_X509_NAME_ENTRY_new_null()) == NULL)
119		goto memerr;
120	if((ret->bytes = BUF_MEM_new()) == NULL) goto memerr;
121	ret->modified=1;
122	*val = (ASN1_VALUE *)ret;
123	return 1;
124
125 memerr:
126	ASN1err(ASN1_F_X509_NAME_EX_NEW, ERR_R_MALLOC_FAILURE);
127	if (ret)
128		{
129		if (ret->entries)
130			sk_X509_NAME_ENTRY_free(ret->entries);
131		OPENSSL_free(ret);
132		}
133	return 0;
134}
135
136static void x509_name_ex_free(ASN1_VALUE **pval, const ASN1_ITEM *it)
137{
138	X509_NAME *a;
139	if(!pval || !*pval)
140	    return;
141	a = (X509_NAME *)*pval;
142
143	BUF_MEM_free(a->bytes);
144	sk_X509_NAME_ENTRY_pop_free(a->entries,X509_NAME_ENTRY_free);
145	OPENSSL_free(a);
146	*pval = NULL;
147}
148
149/* Used with sk_pop_free() to free up the internal representation.
150 * NB: we only free the STACK and not its contents because it is
151 * already present in the X509_NAME structure.
152 */
153
154static void sk_internal_free(void *a)
155{
156	sk_free(a);
157}
158
159static int x509_name_ex_d2i(ASN1_VALUE **val, const unsigned char **in, long len, const ASN1_ITEM *it,
160					int tag, int aclass, char opt, ASN1_TLC *ctx)
161{
162	const unsigned char *p = *in, *q;
163	union { STACK *s; ASN1_VALUE *a; } intname = {NULL};
164	union { X509_NAME *x; ASN1_VALUE *a; } nm = {NULL};
165	int i, j, ret;
166	STACK_OF(X509_NAME_ENTRY) *entries;
167	X509_NAME_ENTRY *entry;
168	q = p;
169
170	/* Get internal representation of Name */
171	ret = ASN1_item_ex_d2i(&intname.a,
172			       &p, len, ASN1_ITEM_rptr(X509_NAME_INTERNAL),
173			       tag, aclass, opt, ctx);
174
175	if(ret <= 0) return ret;
176
177	if(*val) x509_name_ex_free(val, NULL);
178	if(!x509_name_ex_new(&nm.a, NULL)) goto err;
179	/* We've decoded it: now cache encoding */
180	if(!BUF_MEM_grow(nm.x->bytes, p - q)) goto err;
181	memcpy(nm.x->bytes->data, q, p - q);
182
183	/* Convert internal representation to X509_NAME structure */
184	for(i = 0; i < sk_num(intname.s); i++) {
185		entries = (STACK_OF(X509_NAME_ENTRY) *)sk_value(intname.s, i);
186		for(j = 0; j < sk_X509_NAME_ENTRY_num(entries); j++) {
187			entry = sk_X509_NAME_ENTRY_value(entries, j);
188			entry->set = i;
189			if(!sk_X509_NAME_ENTRY_push(nm.x->entries, entry))
190				goto err;
191		}
192		sk_X509_NAME_ENTRY_free(entries);
193	}
194	sk_free(intname.s);
195	nm.x->modified = 0;
196	*val = nm.a;
197	*in = p;
198	return ret;
199err:
200        if (nm.x != NULL)
201		X509_NAME_free(nm.x);
202	ASN1err(ASN1_F_X509_NAME_EX_D2I, ERR_R_NESTED_ASN1_ERROR);
203	return 0;
204}
205
206static int x509_name_ex_i2d(ASN1_VALUE **val, unsigned char **out, const ASN1_ITEM *it, int tag, int aclass)
207{
208	int ret;
209	X509_NAME *a = (X509_NAME *)*val;
210	if(a->modified) {
211		ret = x509_name_encode((X509_NAME *)a);
212		if(ret < 0) return ret;
213	}
214	ret = a->bytes->length;
215	if(out != NULL) {
216		memcpy(*out,a->bytes->data,ret);
217		*out+=ret;
218	}
219	return ret;
220}
221
222static int x509_name_encode(X509_NAME *a)
223{
224	union { STACK *s; ASN1_VALUE *a; } intname = {NULL};
225	int len;
226	unsigned char *p;
227	STACK_OF(X509_NAME_ENTRY) *entries = NULL;
228	X509_NAME_ENTRY *entry;
229	int i, set = -1;
230	intname.s = sk_new_null();
231	if(!intname.s) goto memerr;
232	for(i = 0; i < sk_X509_NAME_ENTRY_num(a->entries); i++) {
233		entry = sk_X509_NAME_ENTRY_value(a->entries, i);
234		if(entry->set != set) {
235			entries = sk_X509_NAME_ENTRY_new_null();
236			if(!entries) goto memerr;
237			if(!sk_push(intname.s, (char *)entries)) goto memerr;
238			set = entry->set;
239		}
240		if(!sk_X509_NAME_ENTRY_push(entries, entry)) goto memerr;
241	}
242	len = ASN1_item_ex_i2d(&intname.a, NULL,
243			       ASN1_ITEM_rptr(X509_NAME_INTERNAL), -1, -1);
244	if (!BUF_MEM_grow(a->bytes,len)) goto memerr;
245	p=(unsigned char *)a->bytes->data;
246	ASN1_item_ex_i2d(&intname.a,
247			 &p, ASN1_ITEM_rptr(X509_NAME_INTERNAL), -1, -1);
248	sk_pop_free(intname.s, sk_internal_free);
249	a->modified = 0;
250	return len;
251	memerr:
252	sk_pop_free(intname.s, sk_internal_free);
253	ASN1err(ASN1_F_X509_NAME_ENCODE, ERR_R_MALLOC_FAILURE);
254	return -1;
255}
256
257
258int X509_NAME_set(X509_NAME **xn, X509_NAME *name)
259	{
260	X509_NAME *in;
261
262	if (!xn || !name) return(0);
263
264	if (*xn != name)
265		{
266		in=X509_NAME_dup(name);
267		if (in != NULL)
268			{
269			X509_NAME_free(*xn);
270			*xn=in;
271			}
272		}
273	return(*xn != NULL);
274	}
275
276IMPLEMENT_STACK_OF(X509_NAME_ENTRY)
277IMPLEMENT_ASN1_SET_OF(X509_NAME_ENTRY)
278