Fix ssl3_get_message handle message fragmentation correctly.
[openssl.git] / ssl / ssl_asn1.c
1 /* ssl/ssl_asn1.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 <stdlib.h>
61 #include <openssl/asn1_mac.h>
62 #include <openssl/objects.h>
63 #include <openssl/x509.h>
64 #include "ssl_locl.h"
65
66 typedef struct ssl_session_asn1_st
67         {
68         ASN1_INTEGER version;
69         ASN1_INTEGER ssl_version;
70         ASN1_OCTET_STRING cipher;
71         ASN1_OCTET_STRING master_key;
72         ASN1_OCTET_STRING session_id;
73         ASN1_OCTET_STRING session_id_context;
74         ASN1_OCTET_STRING key_arg;
75 #ifndef OPENSSL_NO_KRB5
76         ASN1_OCTET_STRING krb5_princ;
77 #endif /* OPENSSL_NO_KRB5 */
78         ASN1_INTEGER time;
79         ASN1_INTEGER timeout;
80         ASN1_INTEGER verify_result;
81         } SSL_SESSION_ASN1;
82
83 int i2d_SSL_SESSION(SSL_SESSION *in, unsigned char **pp)
84         {
85 #define LSIZE2 (sizeof(long)*2)
86         int v1=0,v2=0,v3=0,v4=0,v5=0;
87         unsigned char buf[4],ibuf1[LSIZE2],ibuf2[LSIZE2];
88         unsigned char ibuf3[LSIZE2],ibuf4[LSIZE2],ibuf5[LSIZE2];
89         long l;
90         SSL_SESSION_ASN1 a;
91         M_ASN1_I2D_vars(in);
92
93         if ((in == NULL) || ((in->cipher == NULL) && (in->cipher_id == 0)))
94                 return(0);
95
96         /* Note that I cheat in the following 2 assignments.  I know
97          * that if the ASN1_INTEGER passed to ASN1_INTEGER_set
98          * is > sizeof(long)+1, the buffer will not be re-OPENSSL_malloc()ed.
99          * This is a bit evil but makes things simple, no dynamic allocation
100          * to clean up :-) */
101         a.version.length=LSIZE2;
102         a.version.type=V_ASN1_INTEGER;
103         a.version.data=ibuf1;
104         ASN1_INTEGER_set(&(a.version),SSL_SESSION_ASN1_VERSION);
105
106         a.ssl_version.length=LSIZE2;
107         a.ssl_version.type=V_ASN1_INTEGER;
108         a.ssl_version.data=ibuf2;
109         ASN1_INTEGER_set(&(a.ssl_version),in->ssl_version);
110
111         a.cipher.type=V_ASN1_OCTET_STRING;
112         a.cipher.data=buf;
113
114         if (in->cipher == NULL)
115                 l=in->cipher_id;
116         else
117                 l=in->cipher->id;
118         if (in->ssl_version == SSL2_VERSION)
119                 {
120                 a.cipher.length=3;
121                 buf[0]=((unsigned char)(l>>16L))&0xff;
122                 buf[1]=((unsigned char)(l>> 8L))&0xff;
123                 buf[2]=((unsigned char)(l     ))&0xff;
124                 }
125         else
126                 {
127                 a.cipher.length=2;
128                 buf[0]=((unsigned char)(l>>8L))&0xff;
129                 buf[1]=((unsigned char)(l    ))&0xff;
130                 }
131
132         a.master_key.length=in->master_key_length;
133         a.master_key.type=V_ASN1_OCTET_STRING;
134         a.master_key.data=in->master_key;
135
136         a.session_id.length=in->session_id_length;
137         a.session_id.type=V_ASN1_OCTET_STRING;
138         a.session_id.data=in->session_id;
139
140         a.session_id_context.length=in->sid_ctx_length;
141         a.session_id_context.type=V_ASN1_OCTET_STRING;
142         a.session_id_context.data=in->sid_ctx;
143
144         a.key_arg.length=in->key_arg_length;
145         a.key_arg.type=V_ASN1_OCTET_STRING;
146         a.key_arg.data=in->key_arg;
147
148 #ifndef OPENSSL_NO_KRB5
149         a.krb5_princ.length=in->krb5_client_princ_len;
150         a.krb5_princ.type=V_ASN1_OCTET_STRING;
151         a.krb5_princ.data=in->krb5_client_princ;
152 #endif /* OPENSSL_NO_KRB5 */
153  
154         if (in->time != 0L)
155                 {
156                 a.time.length=LSIZE2;
157                 a.time.type=V_ASN1_INTEGER;
158                 a.time.data=ibuf3;
159                 ASN1_INTEGER_set(&(a.time),in->time);
160                 }
161
162         if (in->timeout != 0L)
163                 {
164                 a.timeout.length=LSIZE2;
165                 a.timeout.type=V_ASN1_INTEGER;
166                 a.timeout.data=ibuf4;
167                 ASN1_INTEGER_set(&(a.timeout),in->timeout);
168                 }
169
170         if (in->verify_result != X509_V_OK)
171                 {
172                 a.verify_result.length=LSIZE2;
173                 a.verify_result.type=V_ASN1_INTEGER;
174                 a.verify_result.data=ibuf5;
175                 ASN1_INTEGER_set(&a.verify_result,in->verify_result);
176                 }
177
178
179         M_ASN1_I2D_len(&(a.version),            i2d_ASN1_INTEGER);
180         M_ASN1_I2D_len(&(a.ssl_version),        i2d_ASN1_INTEGER);
181         M_ASN1_I2D_len(&(a.cipher),             i2d_ASN1_OCTET_STRING);
182         M_ASN1_I2D_len(&(a.session_id),         i2d_ASN1_OCTET_STRING);
183         M_ASN1_I2D_len(&(a.master_key),         i2d_ASN1_OCTET_STRING);
184 #ifndef OPENSSL_NO_KRB5
185         M_ASN1_I2D_len(&(a.krb5_princ),         i2d_ASN1_OCTET_STRING);
186 #endif /* OPENSSL_NO_KRB5 */
187         if (in->key_arg_length > 0)
188                 M_ASN1_I2D_len_IMP_opt(&(a.key_arg),i2d_ASN1_OCTET_STRING);
189         if (in->time != 0L)
190                 M_ASN1_I2D_len_EXP_opt(&(a.time),i2d_ASN1_INTEGER,1,v1);
191         if (in->timeout != 0L)
192                 M_ASN1_I2D_len_EXP_opt(&(a.timeout),i2d_ASN1_INTEGER,2,v2);
193         if (in->peer != NULL)
194                 M_ASN1_I2D_len_EXP_opt(in->peer,i2d_X509,3,v3);
195         M_ASN1_I2D_len_EXP_opt(&a.session_id_context,i2d_ASN1_OCTET_STRING,4,v4);
196         if (in->verify_result != X509_V_OK)
197                 M_ASN1_I2D_len_EXP_opt(&(a.verify_result),i2d_ASN1_INTEGER,5,v5);
198
199         M_ASN1_I2D_seq_total();
200
201         M_ASN1_I2D_put(&(a.version),            i2d_ASN1_INTEGER);
202         M_ASN1_I2D_put(&(a.ssl_version),        i2d_ASN1_INTEGER);
203         M_ASN1_I2D_put(&(a.cipher),             i2d_ASN1_OCTET_STRING);
204         M_ASN1_I2D_put(&(a.session_id),         i2d_ASN1_OCTET_STRING);
205         M_ASN1_I2D_put(&(a.master_key),         i2d_ASN1_OCTET_STRING);
206 #ifndef OPENSSL_NO_KRB5
207         M_ASN1_I2D_put(&(a.krb5_princ),         i2d_ASN1_OCTET_STRING);
208 #endif /* OPENSSL_NO_KRB5 */
209         if (in->key_arg_length > 0)
210                 M_ASN1_I2D_put_IMP_opt(&(a.key_arg),i2d_ASN1_OCTET_STRING,0);
211         if (in->time != 0L)
212                 M_ASN1_I2D_put_EXP_opt(&(a.time),i2d_ASN1_INTEGER,1,v1);
213         if (in->timeout != 0L)
214                 M_ASN1_I2D_put_EXP_opt(&(a.timeout),i2d_ASN1_INTEGER,2,v2);
215         if (in->peer != NULL)
216                 M_ASN1_I2D_put_EXP_opt(in->peer,i2d_X509,3,v3);
217         M_ASN1_I2D_put_EXP_opt(&a.session_id_context,i2d_ASN1_OCTET_STRING,4,
218                                v4);
219         if (in->verify_result != X509_V_OK)
220                 M_ASN1_I2D_put_EXP_opt(&a.verify_result,i2d_ASN1_INTEGER,5,v5);
221         M_ASN1_I2D_finish();
222         }
223
224 SSL_SESSION *d2i_SSL_SESSION(SSL_SESSION **a, unsigned char **pp,
225              long length)
226         {
227         int version,ssl_version=0,i;
228         long id;
229         ASN1_INTEGER ai,*aip;
230         ASN1_OCTET_STRING os,*osp;
231         M_ASN1_D2I_vars(a,SSL_SESSION *,SSL_SESSION_new);
232
233         aip= &ai;
234         osp= &os;
235
236         M_ASN1_D2I_Init();
237         M_ASN1_D2I_start_sequence();
238
239         ai.data=NULL; ai.length=0;
240         M_ASN1_D2I_get(aip,d2i_ASN1_INTEGER);
241         version=(int)ASN1_INTEGER_get(aip);
242         if (ai.data != NULL) { OPENSSL_free(ai.data); ai.data=NULL; ai.length=0; }
243
244         /* we don't care about the version right now :-) */
245         M_ASN1_D2I_get(aip,d2i_ASN1_INTEGER);
246         ssl_version=(int)ASN1_INTEGER_get(aip);
247         ret->ssl_version=ssl_version;
248         if (ai.data != NULL) { OPENSSL_free(ai.data); ai.data=NULL; ai.length=0; }
249
250         os.data=NULL; os.length=0;
251         M_ASN1_D2I_get(osp,d2i_ASN1_OCTET_STRING);
252         if (ssl_version == SSL2_VERSION)
253                 {
254                 if (os.length != 3)
255                         {
256                         c.error=SSL_R_CIPHER_CODE_WRONG_LENGTH;
257                         goto err;
258                         }
259                 id=0x02000000L|
260                         ((unsigned long)os.data[0]<<16L)|
261                         ((unsigned long)os.data[1]<< 8L)|
262                          (unsigned long)os.data[2];
263                 }
264         else if ((ssl_version>>8) == 3)
265                 {
266                 if (os.length != 2)
267                         {
268                         c.error=SSL_R_CIPHER_CODE_WRONG_LENGTH;
269                         goto err;
270                         }
271                 id=0x03000000L|
272                         ((unsigned long)os.data[0]<<8L)|
273                          (unsigned long)os.data[1];
274                 }
275         else
276                 {
277                 SSLerr(SSL_F_D2I_SSL_SESSION,SSL_R_UNKNOWN_SSL_VERSION);
278                 return(NULL);
279                 }
280         
281         ret->cipher=NULL;
282         ret->cipher_id=id;
283
284         M_ASN1_D2I_get(osp,d2i_ASN1_OCTET_STRING);
285         if ((ssl_version>>8) == SSL3_VERSION)
286                 i=SSL3_MAX_SSL_SESSION_ID_LENGTH;
287         else /* if (ssl_version == SSL2_VERSION) */
288                 i=SSL2_MAX_SSL_SESSION_ID_LENGTH;
289
290         if (os.length > i)
291                 os.length=i;
292
293         ret->session_id_length=os.length;
294         memcpy(ret->session_id,os.data,os.length);
295
296         M_ASN1_D2I_get(osp,d2i_ASN1_OCTET_STRING);
297         if (ret->master_key_length > SSL_MAX_MASTER_KEY_LENGTH)
298                 ret->master_key_length=SSL_MAX_MASTER_KEY_LENGTH;
299         else
300                 ret->master_key_length=os.length;
301         memcpy(ret->master_key,os.data,ret->master_key_length);
302
303         os.length=0;
304         M_ASN1_D2I_get_IMP_opt(osp,d2i_ASN1_OCTET_STRING,0,V_ASN1_OCTET_STRING);
305         if (os.length > SSL_MAX_KEY_ARG_LENGTH)
306                 ret->key_arg_length=SSL_MAX_KEY_ARG_LENGTH;
307         else
308                 ret->key_arg_length=os.length;
309         memcpy(ret->key_arg,os.data,ret->key_arg_length);
310         if (os.data != NULL) OPENSSL_free(os.data);
311
312 #ifndef OPENSSL_NO_KRB5
313         os.length=0;
314         M_ASN1_D2I_get_IMP_opt(osp,d2i_ASN1_OCTET_STRING,0,V_ASN1_OCTET_STRING);
315         if (os.length > SSL_MAX_KRB5_PRINCIPAL_LENGTH)
316             ret->krb5_client_princ_len=0;
317         else
318             ret->krb5_client_princ_len=os.length;
319         memcpy(ret->krb5_client_princ,os.data,ret->krb5_client_princ_len);
320         if (os.data != NULL) OPENSSL_free(os.data);
321 #endif /* OPENSSL_NO_KRB5 */
322
323         ai.length=0;
324         M_ASN1_D2I_get_EXP_opt(aip,d2i_ASN1_INTEGER,1);
325         if (ai.data != NULL)
326                 {
327                 ret->time=ASN1_INTEGER_get(aip);
328                 OPENSSL_free(ai.data); ai.data=NULL; ai.length=0;
329                 }
330         else
331                 ret->time=time(NULL);
332
333         ai.length=0;
334         M_ASN1_D2I_get_EXP_opt(aip,d2i_ASN1_INTEGER,2);
335         if (ai.data != NULL)
336                 {
337                 ret->timeout=ASN1_INTEGER_get(aip);
338                 OPENSSL_free(ai.data); ai.data=NULL; ai.length=0;
339                 }
340         else
341                 ret->timeout=3;
342
343         if (ret->peer != NULL)
344                 {
345                 X509_free(ret->peer);
346                 ret->peer=NULL;
347                 }
348         M_ASN1_D2I_get_EXP_opt(ret->peer,d2i_X509,3);
349
350         os.length=0;
351         os.data=NULL;
352         M_ASN1_D2I_get_EXP_opt(osp,d2i_ASN1_OCTET_STRING,4);
353
354         if(os.data != NULL)
355             {
356             if (os.length > SSL_MAX_SID_CTX_LENGTH)
357                 SSLerr(SSL_F_D2I_SSL_SESSION,SSL_R_BAD_LENGTH);
358             ret->sid_ctx_length=os.length;
359             memcpy(ret->sid_ctx,os.data,os.length);
360             OPENSSL_free(os.data); os.data=NULL; os.length=0;
361             }
362         else
363             ret->sid_ctx_length=0;
364
365         ai.length=0;
366         M_ASN1_D2I_get_EXP_opt(aip,d2i_ASN1_INTEGER,5);
367         if (ai.data != NULL)
368                 {
369                 ret->verify_result=ASN1_INTEGER_get(aip);
370                 OPENSSL_free(ai.data); ai.data=NULL; ai.length=0;
371                 }
372         else
373                 ret->verify_result=X509_V_OK;
374
375         M_ASN1_D2I_Finish(a,SSL_SESSION_free,SSL_F_D2I_SSL_SESSION);
376         }