sk_***_new_null() seems to be there to avoid exactly this sort of thing
[openssl.git] / crypto / asn1 / x_name.c
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/objects.h>
62 #include <openssl/asn1_mac.h>
63 #include <openssl/x509.h>
64
65 static int i2d_X509_NAME_entries(X509_NAME *a);
66 int i2d_X509_NAME_ENTRY(X509_NAME_ENTRY *a, unsigned char **pp)
67         {
68         M_ASN1_I2D_vars(a);
69
70         M_ASN1_I2D_len(a->object,i2d_ASN1_OBJECT);
71         M_ASN1_I2D_len(a->value,i2d_ASN1_PRINTABLE);
72
73         M_ASN1_I2D_seq_total();
74
75         M_ASN1_I2D_put(a->object,i2d_ASN1_OBJECT);
76         M_ASN1_I2D_put(a->value,i2d_ASN1_PRINTABLE);
77
78         M_ASN1_I2D_finish();
79         }
80
81 X509_NAME_ENTRY *d2i_X509_NAME_ENTRY(X509_NAME_ENTRY **a, unsigned char **pp,
82              long length)
83         {
84         M_ASN1_D2I_vars(a,X509_NAME_ENTRY *,X509_NAME_ENTRY_new);
85
86         M_ASN1_D2I_Init();
87         M_ASN1_D2I_start_sequence();
88         M_ASN1_D2I_get(ret->object,d2i_ASN1_OBJECT);
89         M_ASN1_D2I_get(ret->value,d2i_ASN1_PRINTABLE);
90         ret->set=0;
91         M_ASN1_D2I_Finish(a,X509_NAME_ENTRY_free,ASN1_F_D2I_X509_NAME_ENTRY);
92         }
93
94 int i2d_X509_NAME(X509_NAME *a, unsigned char **pp)
95         {
96         int ret;
97
98         if (a == NULL) return(0);
99         if (a->modified)
100                 {
101                 ret=i2d_X509_NAME_entries(a);
102                 if (ret < 0) return(ret);
103                 }
104
105         ret=a->bytes->length;
106         if (pp != NULL)
107                 {
108                 memcpy(*pp,a->bytes->data,ret);
109                 *pp+=ret;
110                 }
111         return(ret);
112         }
113
114 static int i2d_X509_NAME_entries(X509_NAME *a)
115         {
116         X509_NAME_ENTRY *ne,*fe=NULL;
117         STACK_OF(X509_NAME_ENTRY) *sk;
118         BUF_MEM *buf=NULL;
119         int set=0,r,ret=0;
120         int i;
121         unsigned char *p;
122         int size=0;
123
124         sk=a->entries;
125         for (i=0; i<sk_X509_NAME_ENTRY_num(sk); i++)
126                 {
127                 ne=sk_X509_NAME_ENTRY_value(sk,i);
128                 if (fe == NULL)
129                         {
130                         fe=ne;
131                         size=0;
132                         }
133
134                 if (ne->set != set)
135                         {
136                         ret+=ASN1_object_size(1,size,V_ASN1_SET);
137                         fe->size=size;
138                         fe=ne;
139                         size=0;
140                         set=ne->set;
141                         }
142                 size+=i2d_X509_NAME_ENTRY(ne,NULL);
143                 }
144
145         ret+=ASN1_object_size(1,size,V_ASN1_SET);
146         if (fe != NULL)
147                 fe->size=size;
148
149         r=ASN1_object_size(1,ret,V_ASN1_SEQUENCE);
150
151         buf=a->bytes;
152         if (!BUF_MEM_grow(buf,r)) goto err;
153         p=(unsigned char *)buf->data;
154
155         ASN1_put_object(&p,1,ret,V_ASN1_SEQUENCE,V_ASN1_UNIVERSAL);
156
157         set= -1;
158         for (i=0; i<sk_X509_NAME_ENTRY_num(sk); i++)
159                 {
160                 ne=sk_X509_NAME_ENTRY_value(sk,i);
161                 if (set != ne->set)
162                         {
163                         set=ne->set;
164                         ASN1_put_object(&p,1,ne->size,
165                                 V_ASN1_SET,V_ASN1_UNIVERSAL);
166                         }
167                 i2d_X509_NAME_ENTRY(ne,&p);
168                 }
169         a->modified=0;
170         return(r);
171 err:
172         return(-1);
173         }
174
175 X509_NAME *d2i_X509_NAME(X509_NAME **a, unsigned char **pp, long length)
176         {
177         int set=0,i;
178         int idx=0;
179         unsigned char *orig;
180         M_ASN1_D2I_vars(a,X509_NAME *,X509_NAME_new);
181
182         orig= *pp;
183         if (sk_X509_NAME_ENTRY_num(ret->entries) > 0)
184                 {
185                 while (sk_X509_NAME_ENTRY_num(ret->entries) > 0)
186                         X509_NAME_ENTRY_free(
187                                        sk_X509_NAME_ENTRY_pop(ret->entries));
188                 }
189
190         M_ASN1_D2I_Init();
191         M_ASN1_D2I_start_sequence();
192         for (;;)
193                 {
194                 if (M_ASN1_D2I_end_sequence()) break;
195                 M_ASN1_D2I_get_set_type(X509_NAME_ENTRY,ret->entries,
196                                         d2i_X509_NAME_ENTRY,
197                                         X509_NAME_ENTRY_free);
198                 for (; idx < sk_X509_NAME_ENTRY_num(ret->entries); idx++)
199                         {
200                         sk_X509_NAME_ENTRY_value(ret->entries,idx)->set=set;
201                         }
202                 set++;
203                 }
204
205         i=(int)(c.p-orig);
206         if (!BUF_MEM_grow(ret->bytes,i)) goto err;
207         memcpy(ret->bytes->data,orig,i);
208         ret->bytes->length=i;
209         ret->modified=0;
210
211         M_ASN1_D2I_Finish(a,X509_NAME_free,ASN1_F_D2I_X509_NAME);
212         }
213
214 X509_NAME *X509_NAME_new(void)
215         {
216         X509_NAME *ret=NULL;
217         ASN1_CTX c;
218
219         M_ASN1_New_Malloc(ret,X509_NAME);
220         if ((ret->entries=sk_X509_NAME_ENTRY_new_null()) == NULL)
221                 { c.line=__LINE__; goto err2; }
222         M_ASN1_New(ret->bytes,BUF_MEM_new);
223         ret->modified=1;
224         return(ret);
225         M_ASN1_New_Error(ASN1_F_X509_NAME_NEW);
226         }
227
228 X509_NAME_ENTRY *X509_NAME_ENTRY_new(void)
229         {
230         X509_NAME_ENTRY *ret=NULL;
231         ASN1_CTX c;
232
233         M_ASN1_New_Malloc(ret,X509_NAME_ENTRY);
234 /*      M_ASN1_New(ret->object,ASN1_OBJECT_new);*/
235         ret->object=NULL;
236         ret->set=0;
237         M_ASN1_New(ret->value,ASN1_STRING_new);
238         return(ret);
239         M_ASN1_New_Error(ASN1_F_X509_NAME_ENTRY_NEW);
240         }
241
242 void X509_NAME_free(X509_NAME *a)
243         {
244         if(a == NULL)
245             return;
246
247         BUF_MEM_free(a->bytes);
248         sk_X509_NAME_ENTRY_pop_free(a->entries,X509_NAME_ENTRY_free);
249         Free(a);
250         }
251
252 void X509_NAME_ENTRY_free(X509_NAME_ENTRY *a)
253         {
254         if (a == NULL) return;
255         ASN1_OBJECT_free(a->object);
256         M_ASN1_BIT_STRING_free(a->value);
257         Free(a);
258         }
259
260 int X509_NAME_set(X509_NAME **xn, X509_NAME *name)
261         {
262         X509_NAME *in;
263
264         if (*xn == NULL) return(0);
265
266         if (*xn != name)
267                 {
268                 in=X509_NAME_dup(name);
269                 if (in != NULL)
270                         {
271                         X509_NAME_free(*xn);
272                         *xn=in;
273                         }
274                 }
275         return(*xn != NULL);
276         }
277         
278 IMPLEMENT_STACK_OF(X509_NAME_ENTRY)
279 IMPLEMENT_ASN1_SET_OF(X509_NAME_ENTRY)