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 "ssl_locl.h"
62#include <openssl/asn1_mac.h>
63#include <openssl/objects.h>
64#include <openssl/x509.h>
65
66typedef 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
83int 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	if (in->krb5_client_princ_len)
150		{
151		a.krb5_princ.length=in->krb5_client_princ_len;
152		a.krb5_princ.type=V_ASN1_OCTET_STRING;
153		a.krb5_princ.data=in->krb5_client_princ;
154		}
155#endif /* OPENSSL_NO_KRB5 */
156
157	if (in->time != 0L)
158		{
159		a.time.length=LSIZE2;
160		a.time.type=V_ASN1_INTEGER;
161		a.time.data=ibuf3;
162		ASN1_INTEGER_set(&(a.time),in->time);
163		}
164
165	if (in->timeout != 0L)
166		{
167		a.timeout.length=LSIZE2;
168		a.timeout.type=V_ASN1_INTEGER;
169		a.timeout.data=ibuf4;
170		ASN1_INTEGER_set(&(a.timeout),in->timeout);
171		}
172
173	if (in->verify_result != X509_V_OK)
174		{
175		a.verify_result.length=LSIZE2;
176		a.verify_result.type=V_ASN1_INTEGER;
177		a.verify_result.data=ibuf5;
178		ASN1_INTEGER_set(&a.verify_result,in->verify_result);
179		}
180
181
182	M_ASN1_I2D_len(&(a.version),		i2d_ASN1_INTEGER);
183	M_ASN1_I2D_len(&(a.ssl_version),	i2d_ASN1_INTEGER);
184	M_ASN1_I2D_len(&(a.cipher),		i2d_ASN1_OCTET_STRING);
185	M_ASN1_I2D_len(&(a.session_id),		i2d_ASN1_OCTET_STRING);
186	M_ASN1_I2D_len(&(a.master_key),		i2d_ASN1_OCTET_STRING);
187#ifndef OPENSSL_NO_KRB5
188	if (in->krb5_client_princ_len)
189        	M_ASN1_I2D_len(&(a.krb5_princ),	i2d_ASN1_OCTET_STRING);
190#endif /* OPENSSL_NO_KRB5 */
191	if (in->key_arg_length > 0)
192		M_ASN1_I2D_len_IMP_opt(&(a.key_arg),i2d_ASN1_OCTET_STRING);
193	if (in->time != 0L)
194		M_ASN1_I2D_len_EXP_opt(&(a.time),i2d_ASN1_INTEGER,1,v1);
195	if (in->timeout != 0L)
196		M_ASN1_I2D_len_EXP_opt(&(a.timeout),i2d_ASN1_INTEGER,2,v2);
197	if (in->peer != NULL)
198		M_ASN1_I2D_len_EXP_opt(in->peer,i2d_X509,3,v3);
199	M_ASN1_I2D_len_EXP_opt(&a.session_id_context,i2d_ASN1_OCTET_STRING,4,v4);
200	if (in->verify_result != X509_V_OK)
201		M_ASN1_I2D_len_EXP_opt(&(a.verify_result),i2d_ASN1_INTEGER,5,v5);
202
203	M_ASN1_I2D_seq_total();
204
205	M_ASN1_I2D_put(&(a.version),		i2d_ASN1_INTEGER);
206	M_ASN1_I2D_put(&(a.ssl_version),	i2d_ASN1_INTEGER);
207	M_ASN1_I2D_put(&(a.cipher),		i2d_ASN1_OCTET_STRING);
208	M_ASN1_I2D_put(&(a.session_id),		i2d_ASN1_OCTET_STRING);
209	M_ASN1_I2D_put(&(a.master_key),		i2d_ASN1_OCTET_STRING);
210#ifndef OPENSSL_NO_KRB5
211	if (in->krb5_client_princ_len)
212        	M_ASN1_I2D_put(&(a.krb5_princ),	i2d_ASN1_OCTET_STRING);
213#endif /* OPENSSL_NO_KRB5 */
214	if (in->key_arg_length > 0)
215		M_ASN1_I2D_put_IMP_opt(&(a.key_arg),i2d_ASN1_OCTET_STRING,0);
216	if (in->time != 0L)
217		M_ASN1_I2D_put_EXP_opt(&(a.time),i2d_ASN1_INTEGER,1,v1);
218	if (in->timeout != 0L)
219		M_ASN1_I2D_put_EXP_opt(&(a.timeout),i2d_ASN1_INTEGER,2,v2);
220	if (in->peer != NULL)
221		M_ASN1_I2D_put_EXP_opt(in->peer,i2d_X509,3,v3);
222	M_ASN1_I2D_put_EXP_opt(&a.session_id_context,i2d_ASN1_OCTET_STRING,4,
223			       v4);
224	if (in->verify_result != X509_V_OK)
225		M_ASN1_I2D_put_EXP_opt(&a.verify_result,i2d_ASN1_INTEGER,5,v5);
226	M_ASN1_I2D_finish();
227	}
228
229SSL_SESSION *d2i_SSL_SESSION(SSL_SESSION **a, unsigned char **pp,
230	     long length)
231	{
232	int version,ssl_version=0,i;
233	long id;
234	ASN1_INTEGER ai,*aip;
235	ASN1_OCTET_STRING os,*osp;
236	M_ASN1_D2I_vars(a,SSL_SESSION *,SSL_SESSION_new);
237
238	aip= &ai;
239	osp= &os;
240
241	M_ASN1_D2I_Init();
242	M_ASN1_D2I_start_sequence();
243
244	ai.data=NULL; ai.length=0;
245	M_ASN1_D2I_get(aip,d2i_ASN1_INTEGER);
246	version=(int)ASN1_INTEGER_get(aip);
247	if (ai.data != NULL) { OPENSSL_free(ai.data); ai.data=NULL; ai.length=0; }
248
249	/* we don't care about the version right now :-) */
250	M_ASN1_D2I_get(aip,d2i_ASN1_INTEGER);
251	ssl_version=(int)ASN1_INTEGER_get(aip);
252	ret->ssl_version=ssl_version;
253	if (ai.data != NULL) { OPENSSL_free(ai.data); ai.data=NULL; ai.length=0; }
254
255	os.data=NULL; os.length=0;
256	M_ASN1_D2I_get(osp,d2i_ASN1_OCTET_STRING);
257	if (ssl_version == SSL2_VERSION)
258		{
259		if (os.length != 3)
260			{
261			c.error=SSL_R_CIPHER_CODE_WRONG_LENGTH;
262			goto err;
263			}
264		id=0x02000000L|
265			((unsigned long)os.data[0]<<16L)|
266			((unsigned long)os.data[1]<< 8L)|
267			 (unsigned long)os.data[2];
268		}
269	else if ((ssl_version>>8) == 3)
270		{
271		if (os.length != 2)
272			{
273			c.error=SSL_R_CIPHER_CODE_WRONG_LENGTH;
274			goto err;
275			}
276		id=0x03000000L|
277			((unsigned long)os.data[0]<<8L)|
278			 (unsigned long)os.data[1];
279		}
280	else
281		{
282		SSLerr(SSL_F_D2I_SSL_SESSION,SSL_R_UNKNOWN_SSL_VERSION);
283		return(NULL);
284		}
285
286	ret->cipher=NULL;
287	ret->cipher_id=id;
288
289	M_ASN1_D2I_get(osp,d2i_ASN1_OCTET_STRING);
290	if ((ssl_version>>8) == SSL3_VERSION)
291		i=SSL3_MAX_SSL_SESSION_ID_LENGTH;
292	else /* if (ssl_version == SSL2_VERSION) */
293		i=SSL2_MAX_SSL_SESSION_ID_LENGTH;
294
295	if (os.length > i)
296		os.length = i;
297	if (os.length > sizeof ret->session_id) /* can't happen */
298		os.length = sizeof ret->session_id;
299
300	ret->session_id_length=os.length;
301	OPENSSL_assert(os.length <= sizeof ret->session_id);
302	memcpy(ret->session_id,os.data,os.length);
303
304	M_ASN1_D2I_get(osp,d2i_ASN1_OCTET_STRING);
305	if (ret->master_key_length > SSL_MAX_MASTER_KEY_LENGTH)
306		ret->master_key_length=SSL_MAX_MASTER_KEY_LENGTH;
307	else
308		ret->master_key_length=os.length;
309	memcpy(ret->master_key,os.data,ret->master_key_length);
310
311	os.length=0;
312
313#ifndef OPENSSL_NO_KRB5
314	os.length=0;
315	M_ASN1_D2I_get_opt(osp,d2i_ASN1_OCTET_STRING,V_ASN1_OCTET_STRING);
316	if (os.data)
317		{
318        	if (os.length > SSL_MAX_KRB5_PRINCIPAL_LENGTH)
319            		ret->krb5_client_princ_len=0;
320		else
321			ret->krb5_client_princ_len=os.length;
322		memcpy(ret->krb5_client_princ,os.data,ret->krb5_client_princ_len);
323		OPENSSL_free(os.data);
324		os.data = NULL;
325		os.length = 0;
326		}
327	else
328		ret->krb5_client_princ_len=0;
329#endif /* OPENSSL_NO_KRB5 */
330
331	M_ASN1_D2I_get_IMP_opt(osp,d2i_ASN1_OCTET_STRING,0,V_ASN1_OCTET_STRING);
332	if (os.length > SSL_MAX_KEY_ARG_LENGTH)
333		ret->key_arg_length=SSL_MAX_KEY_ARG_LENGTH;
334	else
335		ret->key_arg_length=os.length;
336	memcpy(ret->key_arg,os.data,ret->key_arg_length);
337	if (os.data != NULL) OPENSSL_free(os.data);
338
339	ai.length=0;
340	M_ASN1_D2I_get_EXP_opt(aip,d2i_ASN1_INTEGER,1);
341	if (ai.data != NULL)
342		{
343		ret->time=ASN1_INTEGER_get(aip);
344		OPENSSL_free(ai.data); ai.data=NULL; ai.length=0;
345		}
346	else
347		ret->time=time(NULL);
348
349	ai.length=0;
350	M_ASN1_D2I_get_EXP_opt(aip,d2i_ASN1_INTEGER,2);
351	if (ai.data != NULL)
352		{
353		ret->timeout=ASN1_INTEGER_get(aip);
354		OPENSSL_free(ai.data); ai.data=NULL; ai.length=0;
355		}
356	else
357		ret->timeout=3;
358
359	if (ret->peer != NULL)
360		{
361		X509_free(ret->peer);
362		ret->peer=NULL;
363		}
364	M_ASN1_D2I_get_EXP_opt(ret->peer,d2i_X509,3);
365
366	os.length=0;
367	os.data=NULL;
368	M_ASN1_D2I_get_EXP_opt(osp,d2i_ASN1_OCTET_STRING,4);
369
370	if(os.data != NULL)
371	    {
372	    if (os.length > SSL_MAX_SID_CTX_LENGTH)
373		{
374		ret->sid_ctx_length=os.length;
375		SSLerr(SSL_F_D2I_SSL_SESSION,SSL_R_BAD_LENGTH);
376		}
377	    else
378		{
379		ret->sid_ctx_length=os.length;
380		memcpy(ret->sid_ctx,os.data,os.length);
381		}
382	    OPENSSL_free(os.data); os.data=NULL; os.length=0;
383	    }
384	else
385	    ret->sid_ctx_length=0;
386
387	ai.length=0;
388	M_ASN1_D2I_get_EXP_opt(aip,d2i_ASN1_INTEGER,5);
389	if (ai.data != NULL)
390		{
391		ret->verify_result=ASN1_INTEGER_get(aip);
392		OPENSSL_free(ai.data); ai.data=NULL; ai.length=0;
393		}
394	else
395		ret->verify_result=X509_V_OK;
396
397	M_ASN1_D2I_Finish(a,SSL_SESSION_free,SSL_F_D2I_SSL_SESSION);
398	}
399