Import of old SSLeay release: SSLeay 0.8.1b
[openssl.git] / ssl / ssl_asn1.c
1 /* ssl/ssl_asn1.c */
2 /* Copyright (C) 1995-1997 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 <stdlib.h>
61 #include "asn1_mac.h"
62 #include "objects.h"
63 #include "ssl_locl.h"
64
65 typedef struct ssl_session_asn1_st
66         {
67         ASN1_INTEGER version;
68         ASN1_INTEGER ssl_version;
69         ASN1_OCTET_STRING cipher;
70         ASN1_OCTET_STRING master_key;
71         ASN1_OCTET_STRING session_id;
72         ASN1_OCTET_STRING key_arg;
73         ASN1_INTEGER time;
74         ASN1_INTEGER timeout;
75         } SSL_SESSION_ASN1;
76
77 /*
78  * SSLerr(SSL_F_I2D_SSL_SESSION,SSL_R_CIPHER_CODE_WRONG_LENGTH);
79  * SSLerr(SSL_F_D2I_SSL_SESSION,SSL_R_UNSUPPORTED_CIPHER);
80  */
81
82 int i2d_SSL_SESSION(in,pp)
83 SSL_SESSION *in;
84 unsigned char **pp;
85         {
86 #define LSIZE2 (sizeof(long)*2)
87         int v1=0,v2=0,v3=0;
88         unsigned char buf[4],ibuf1[LSIZE2],ibuf2[LSIZE2];
89         unsigned char ibuf3[LSIZE2],ibuf4[LSIZE2];
90         long l;
91         SSL_SESSION_ASN1 a;
92         M_ASN1_I2D_vars(in);
93
94         if ((in == NULL) || ((in->cipher == NULL) && (in->cipher_id == 0)))
95                 return(0);
96
97         /* Note that I cheat in the following 2 assignments.  I know
98          * that if the ASN1_INTERGER passed to ASN1_INTEGER_set
99          * is > sizeof(long)+1, the buffer will not be re-Malloc()ed.
100          * This is a bit evil but makes things simple, no dynamic allocation
101          * to clean up :-) */
102         a.version.length=LSIZE2;
103         a.version.type=V_ASN1_INTEGER;
104         a.version.data=ibuf1;
105         ASN1_INTEGER_set(&(a.version),SSL_SESSION_ASN1_VERSION);
106
107         a.ssl_version.length=LSIZE2;
108         a.ssl_version.type=V_ASN1_INTEGER;
109         a.ssl_version.data=ibuf2;
110         ASN1_INTEGER_set(&(a.ssl_version),in->ssl_version);
111
112         a.cipher.type=V_ASN1_OCTET_STRING;
113         a.cipher.data=buf;
114
115         if (in->cipher == NULL)
116                 l=in->cipher_id;
117         else
118                 l=in->cipher->id;
119         if (in->ssl_version == 2)
120                 {
121                 a.cipher.length=3;
122                 buf[0]=((unsigned char)(l>>16L))&0xff;
123                 buf[1]=((unsigned char)(l>> 8L))&0xff;
124                 buf[2]=((unsigned char)(l     ))&0xff;
125                 }
126         else
127                 {
128                 a.cipher.length=2;
129                 buf[0]=((unsigned char)(l>>8L))&0xff;
130                 buf[1]=((unsigned char)(l    ))&0xff;
131                 }
132
133         a.master_key.length=in->master_key_length;
134         a.master_key.type=V_ASN1_OCTET_STRING;
135         a.master_key.data=in->master_key;
136
137         a.session_id.length=in->session_id_length;
138         a.session_id.type=V_ASN1_OCTET_STRING;
139         a.session_id.data=in->session_id;
140
141         a.key_arg.length=in->key_arg_length;
142         a.key_arg.type=V_ASN1_OCTET_STRING;
143         a.key_arg.data=in->key_arg;
144
145         if (in->time != 0L)
146                 {
147                 a.time.length=LSIZE2;
148                 a.time.type=V_ASN1_INTEGER;
149                 a.time.data=ibuf3;
150                 ASN1_INTEGER_set(&(a.time),in->time);
151                 }
152
153         if (in->timeout != 0L)
154                 {
155                 a.timeout.length=LSIZE2;
156                 a.timeout.type=V_ASN1_INTEGER;
157                 a.timeout.data=ibuf4;
158                 ASN1_INTEGER_set(&(a.timeout),in->timeout);
159                 }
160
161         M_ASN1_I2D_len(&(a.version),            i2d_ASN1_INTEGER);
162         M_ASN1_I2D_len(&(a.ssl_version),        i2d_ASN1_INTEGER);
163         M_ASN1_I2D_len(&(a.cipher),             i2d_ASN1_OCTET_STRING);
164         M_ASN1_I2D_len(&(a.session_id),         i2d_ASN1_OCTET_STRING);
165         M_ASN1_I2D_len(&(a.master_key),         i2d_ASN1_OCTET_STRING);
166         if (in->key_arg_length > 0)
167                 M_ASN1_I2D_len_IMP_opt(&(a.key_arg),i2d_ASN1_OCTET_STRING);
168         if (in->time != 0L)
169                 M_ASN1_I2D_len_EXP_opt(&(a.time),i2d_ASN1_INTEGER,1,v1);
170         if (in->timeout != 0L)
171                 M_ASN1_I2D_len_EXP_opt(&(a.timeout),i2d_ASN1_INTEGER,2,v2);
172         if (in->peer != NULL)
173                 M_ASN1_I2D_len_EXP_opt(in->peer,i2d_X509,3,v3);
174
175         M_ASN1_I2D_seq_total();
176
177         M_ASN1_I2D_put(&(a.version),            i2d_ASN1_INTEGER);
178         M_ASN1_I2D_put(&(a.ssl_version),        i2d_ASN1_INTEGER);
179         M_ASN1_I2D_put(&(a.cipher),             i2d_ASN1_OCTET_STRING);
180         M_ASN1_I2D_put(&(a.session_id),         i2d_ASN1_OCTET_STRING);
181         M_ASN1_I2D_put(&(a.master_key),         i2d_ASN1_OCTET_STRING);
182         if (in->key_arg_length > 0)
183                 M_ASN1_I2D_put_IMP_opt(&(a.key_arg),i2d_ASN1_OCTET_STRING,0);
184         if (in->time != 0L)
185                 M_ASN1_I2D_put_EXP_opt(&(a.time),i2d_ASN1_INTEGER,1,v1);
186         if (in->timeout != 0L)
187                 M_ASN1_I2D_put_EXP_opt(&(a.timeout),i2d_ASN1_INTEGER,2,v2);
188         if (in->peer != NULL)
189                 M_ASN1_I2D_put_EXP_opt(in->peer,i2d_X509,3,v3);
190
191         M_ASN1_I2D_finish();
192         }
193
194 SSL_SESSION *d2i_SSL_SESSION(a,pp,length)
195 SSL_SESSION **a;
196 unsigned char **pp;
197 long length;
198         {
199         int version,ssl_version=0,i;
200         long id;
201         ASN1_INTEGER ai,*aip;
202         ASN1_OCTET_STRING os,*osp;
203         M_ASN1_D2I_vars(a,SSL_SESSION *,SSL_SESSION_new);
204
205         aip= &ai;
206         osp= &os;
207
208         M_ASN1_D2I_Init();
209         M_ASN1_D2I_start_sequence();
210
211         ai.data=NULL; ai.length=0;
212         M_ASN1_D2I_get(aip,d2i_ASN1_INTEGER);
213         version=(int)ASN1_INTEGER_get(aip);
214         if (ai.data != NULL) { Free(ai.data); ai.data=NULL; ai.length=0; }
215
216         /* we don't care about the version right now :-) */
217         M_ASN1_D2I_get(aip,d2i_ASN1_INTEGER);
218         ssl_version=(int)ASN1_INTEGER_get(aip);
219         ret->ssl_version=ssl_version;
220         if (ai.data != NULL) { Free(ai.data); ai.data=NULL; ai.length=0; }
221
222         os.data=NULL; os.length=0;
223         M_ASN1_D2I_get(osp,d2i_ASN1_OCTET_STRING);
224         if (ssl_version == 2)
225                 {
226                 if (os.length != 3)
227                         {
228                         c.error=SSL_R_CIPHER_CODE_WRONG_LENGTH;
229                         goto err;
230                         }
231                 id=0x02000000L|
232                         ((unsigned long)os.data[0]<<16L)|
233                         ((unsigned long)os.data[1]<< 8L)|
234                          (unsigned long)os.data[2];
235                 }
236         else if (ssl_version == 3)
237                 {
238                 if (os.length != 2)
239                         {
240                         c.error=SSL_R_CIPHER_CODE_WRONG_LENGTH;
241                         goto err;
242                         }
243                 id=0x03000000L|
244                         ((unsigned long)os.data[0]<<8L)|
245                          (unsigned long)os.data[1];
246                 }
247         else
248                 {
249                 SSLerr(SSL_F_D2I_SSL_SESSION,SSL_R_UNKNOWN_SSL_VERSION);
250                 return(NULL);
251                 }
252         
253         ret->cipher=NULL;
254         ret->cipher_id=id;
255
256         M_ASN1_D2I_get(osp,d2i_ASN1_OCTET_STRING);
257         if (ssl_version == 3)
258                 i=SSL3_MAX_SSL_SESSION_ID_LENGTH;
259         else /* if (ssl_version == 2) */
260                 i=SSL2_MAX_SSL_SESSION_ID_LENGTH;
261
262         if (os.length > i)
263                 os.length=i;
264
265         ret->session_id_length=os.length;
266         memcpy(ret->session_id,os.data,os.length);
267
268         M_ASN1_D2I_get(osp,d2i_ASN1_OCTET_STRING);
269         if (ret->master_key_length > SSL_MAX_MASTER_KEY_LENGTH)
270                 ret->master_key_length=SSL_MAX_MASTER_KEY_LENGTH;
271         else
272                 ret->master_key_length=os.length;
273         memcpy(ret->master_key,os.data,ret->master_key_length);
274
275         os.length=0;
276         M_ASN1_D2I_get_IMP_opt(osp,d2i_ASN1_OCTET_STRING,0,V_ASN1_OCTET_STRING);
277         if (os.length > SSL_MAX_KEY_ARG_LENGTH)
278                 ret->key_arg_length=SSL_MAX_KEY_ARG_LENGTH;
279         else
280                 ret->key_arg_length=os.length;
281         memcpy(ret->key_arg,os.data,ret->key_arg_length);
282         if (os.data != NULL) Free(os.data);
283
284         ai.length=0;
285         M_ASN1_D2I_get_EXP_opt(aip,d2i_ASN1_INTEGER,1);
286         if (ai.data != NULL)
287                 {
288                 ret->time=ASN1_INTEGER_get(aip);
289                 Free(ai.data); ai.data=NULL; ai.length=0;
290                 }
291         else
292                 ret->time=time(NULL);
293
294         ai.length=0;
295         M_ASN1_D2I_get_EXP_opt(aip,d2i_ASN1_INTEGER,2);
296         if (ai.data != NULL)
297                 {
298                 ret->timeout=ASN1_INTEGER_get(aip);
299                 Free(ai.data); ai.data=NULL; ai.length=0;
300                 }
301         else
302                 ret->timeout=3;
303
304         if (ret->peer != NULL)
305                 {
306                 X509_free(ret->peer);
307                 ret->peer=NULL;
308                 }
309         M_ASN1_D2I_get_EXP_opt(ret->peer,d2i_X509,3);
310
311         M_ASN1_D2I_Finish(a,SSL_SESSION_free,SSL_F_D2I_SSL_SESSION);
312         }
313