xref: /freebsd/crypto/openssl/ssl/ssl_asn1.c (revision 6780ab54325a71e7e70112b11657973edde8655e)
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 #include "cryptlib.h"
66 
67 typedef struct ssl_session_asn1_st
68 	{
69 	ASN1_INTEGER version;
70 	ASN1_INTEGER ssl_version;
71 	ASN1_OCTET_STRING cipher;
72 	ASN1_OCTET_STRING master_key;
73 	ASN1_OCTET_STRING session_id;
74 	ASN1_OCTET_STRING session_id_context;
75 	ASN1_OCTET_STRING key_arg;
76 #ifndef OPENSSL_NO_KRB5
77         ASN1_OCTET_STRING krb5_princ;
78 #endif /* OPENSSL_NO_KRB5 */
79 	ASN1_INTEGER time;
80 	ASN1_INTEGER timeout;
81 	ASN1_INTEGER verify_result;
82 	} SSL_SESSION_ASN1;
83 
84 int i2d_SSL_SESSION(SSL_SESSION *in, unsigned char **pp)
85 	{
86 #define LSIZE2 (sizeof(long)*2)
87 	int v1=0,v2=0,v3=0,v4=0,v5=0;
88 	unsigned char buf[4],ibuf1[LSIZE2],ibuf2[LSIZE2];
89 	unsigned char ibuf3[LSIZE2],ibuf4[LSIZE2],ibuf5[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_INTEGER passed to ASN1_INTEGER_set
99 	 * is > sizeof(long)+1, the buffer will not be re-OPENSSL_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 == SSL2_VERSION)
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.session_id_context.length=in->sid_ctx_length;
142 	a.session_id_context.type=V_ASN1_OCTET_STRING;
143 	a.session_id_context.data=in->sid_ctx;
144 
145 	a.key_arg.length=in->key_arg_length;
146 	a.key_arg.type=V_ASN1_OCTET_STRING;
147 	a.key_arg.data=in->key_arg;
148 
149 #ifndef OPENSSL_NO_KRB5
150 	if (in->krb5_client_princ_len)
151 		{
152 		a.krb5_princ.length=in->krb5_client_princ_len;
153 		a.krb5_princ.type=V_ASN1_OCTET_STRING;
154 		a.krb5_princ.data=in->krb5_client_princ;
155 		}
156 #endif /* OPENSSL_NO_KRB5 */
157 
158 	if (in->time != 0L)
159 		{
160 		a.time.length=LSIZE2;
161 		a.time.type=V_ASN1_INTEGER;
162 		a.time.data=ibuf3;
163 		ASN1_INTEGER_set(&(a.time),in->time);
164 		}
165 
166 	if (in->timeout != 0L)
167 		{
168 		a.timeout.length=LSIZE2;
169 		a.timeout.type=V_ASN1_INTEGER;
170 		a.timeout.data=ibuf4;
171 		ASN1_INTEGER_set(&(a.timeout),in->timeout);
172 		}
173 
174 	if (in->verify_result != X509_V_OK)
175 		{
176 		a.verify_result.length=LSIZE2;
177 		a.verify_result.type=V_ASN1_INTEGER;
178 		a.verify_result.data=ibuf5;
179 		ASN1_INTEGER_set(&a.verify_result,in->verify_result);
180 		}
181 
182 
183 	M_ASN1_I2D_len(&(a.version),		i2d_ASN1_INTEGER);
184 	M_ASN1_I2D_len(&(a.ssl_version),	i2d_ASN1_INTEGER);
185 	M_ASN1_I2D_len(&(a.cipher),		i2d_ASN1_OCTET_STRING);
186 	M_ASN1_I2D_len(&(a.session_id),		i2d_ASN1_OCTET_STRING);
187 	M_ASN1_I2D_len(&(a.master_key),		i2d_ASN1_OCTET_STRING);
188 #ifndef OPENSSL_NO_KRB5
189 	if (in->krb5_client_princ_len)
190         	M_ASN1_I2D_len(&(a.krb5_princ),	i2d_ASN1_OCTET_STRING);
191 #endif /* OPENSSL_NO_KRB5 */
192 	if (in->key_arg_length > 0)
193 		M_ASN1_I2D_len_IMP_opt(&(a.key_arg),i2d_ASN1_OCTET_STRING);
194 	if (in->time != 0L)
195 		M_ASN1_I2D_len_EXP_opt(&(a.time),i2d_ASN1_INTEGER,1,v1);
196 	if (in->timeout != 0L)
197 		M_ASN1_I2D_len_EXP_opt(&(a.timeout),i2d_ASN1_INTEGER,2,v2);
198 	if (in->peer != NULL)
199 		M_ASN1_I2D_len_EXP_opt(in->peer,i2d_X509,3,v3);
200 	M_ASN1_I2D_len_EXP_opt(&a.session_id_context,i2d_ASN1_OCTET_STRING,4,v4);
201 	if (in->verify_result != X509_V_OK)
202 		M_ASN1_I2D_len_EXP_opt(&(a.verify_result),i2d_ASN1_INTEGER,5,v5);
203 
204 	M_ASN1_I2D_seq_total();
205 
206 	M_ASN1_I2D_put(&(a.version),		i2d_ASN1_INTEGER);
207 	M_ASN1_I2D_put(&(a.ssl_version),	i2d_ASN1_INTEGER);
208 	M_ASN1_I2D_put(&(a.cipher),		i2d_ASN1_OCTET_STRING);
209 	M_ASN1_I2D_put(&(a.session_id),		i2d_ASN1_OCTET_STRING);
210 	M_ASN1_I2D_put(&(a.master_key),		i2d_ASN1_OCTET_STRING);
211 #ifndef OPENSSL_NO_KRB5
212 	if (in->krb5_client_princ_len)
213         	M_ASN1_I2D_put(&(a.krb5_princ),	i2d_ASN1_OCTET_STRING);
214 #endif /* OPENSSL_NO_KRB5 */
215 	if (in->key_arg_length > 0)
216 		M_ASN1_I2D_put_IMP_opt(&(a.key_arg),i2d_ASN1_OCTET_STRING,0);
217 	if (in->time != 0L)
218 		M_ASN1_I2D_put_EXP_opt(&(a.time),i2d_ASN1_INTEGER,1,v1);
219 	if (in->timeout != 0L)
220 		M_ASN1_I2D_put_EXP_opt(&(a.timeout),i2d_ASN1_INTEGER,2,v2);
221 	if (in->peer != NULL)
222 		M_ASN1_I2D_put_EXP_opt(in->peer,i2d_X509,3,v3);
223 	M_ASN1_I2D_put_EXP_opt(&a.session_id_context,i2d_ASN1_OCTET_STRING,4,
224 			       v4);
225 	if (in->verify_result != X509_V_OK)
226 		M_ASN1_I2D_put_EXP_opt(&a.verify_result,i2d_ASN1_INTEGER,5,v5);
227 	M_ASN1_I2D_finish();
228 	}
229 
230 SSL_SESSION *d2i_SSL_SESSION(SSL_SESSION **a, unsigned char **pp,
231 	     long length)
232 	{
233 	int version,ssl_version=0,i;
234 	long id;
235 	ASN1_INTEGER ai,*aip;
236 	ASN1_OCTET_STRING os,*osp;
237 	M_ASN1_D2I_vars(a,SSL_SESSION *,SSL_SESSION_new);
238 
239 	aip= &ai;
240 	osp= &os;
241 
242 	M_ASN1_D2I_Init();
243 	M_ASN1_D2I_start_sequence();
244 
245 	ai.data=NULL; ai.length=0;
246 	M_ASN1_D2I_get(aip,d2i_ASN1_INTEGER);
247 	version=(int)ASN1_INTEGER_get(aip);
248 	if (ai.data != NULL) { OPENSSL_free(ai.data); ai.data=NULL; ai.length=0; }
249 
250 	/* we don't care about the version right now :-) */
251 	M_ASN1_D2I_get(aip,d2i_ASN1_INTEGER);
252 	ssl_version=(int)ASN1_INTEGER_get(aip);
253 	ret->ssl_version=ssl_version;
254 	if (ai.data != NULL) { OPENSSL_free(ai.data); ai.data=NULL; ai.length=0; }
255 
256 	os.data=NULL; os.length=0;
257 	M_ASN1_D2I_get(osp,d2i_ASN1_OCTET_STRING);
258 	if (ssl_version == SSL2_VERSION)
259 		{
260 		if (os.length != 3)
261 			{
262 			c.error=SSL_R_CIPHER_CODE_WRONG_LENGTH;
263 			goto err;
264 			}
265 		id=0x02000000L|
266 			((unsigned long)os.data[0]<<16L)|
267 			((unsigned long)os.data[1]<< 8L)|
268 			 (unsigned long)os.data[2];
269 		}
270 	else if ((ssl_version>>8) == 3)
271 		{
272 		if (os.length != 2)
273 			{
274 			c.error=SSL_R_CIPHER_CODE_WRONG_LENGTH;
275 			goto err;
276 			}
277 		id=0x03000000L|
278 			((unsigned long)os.data[0]<<8L)|
279 			 (unsigned long)os.data[1];
280 		}
281 	else
282 		{
283 		SSLerr(SSL_F_D2I_SSL_SESSION,SSL_R_UNKNOWN_SSL_VERSION);
284 		return(NULL);
285 		}
286 
287 	ret->cipher=NULL;
288 	ret->cipher_id=id;
289 
290 	M_ASN1_D2I_get(osp,d2i_ASN1_OCTET_STRING);
291 	if ((ssl_version>>8) == SSL3_VERSION)
292 		i=SSL3_MAX_SSL_SESSION_ID_LENGTH;
293 	else /* if (ssl_version == SSL2_VERSION) */
294 		i=SSL2_MAX_SSL_SESSION_ID_LENGTH;
295 
296 	if (os.length > i)
297 		os.length = i;
298 	if (os.length > sizeof ret->session_id) /* can't happen */
299 		os.length = sizeof ret->session_id;
300 
301 	ret->session_id_length=os.length;
302 	OPENSSL_assert(os.length <= sizeof ret->session_id);
303 	memcpy(ret->session_id,os.data,os.length);
304 
305 	M_ASN1_D2I_get(osp,d2i_ASN1_OCTET_STRING);
306 	if (ret->master_key_length > SSL_MAX_MASTER_KEY_LENGTH)
307 		ret->master_key_length=SSL_MAX_MASTER_KEY_LENGTH;
308 	else
309 		ret->master_key_length=os.length;
310 	memcpy(ret->master_key,os.data,ret->master_key_length);
311 
312 	os.length=0;
313 
314 #ifndef OPENSSL_NO_KRB5
315 	os.length=0;
316 	M_ASN1_D2I_get_opt(osp,d2i_ASN1_OCTET_STRING,V_ASN1_OCTET_STRING);
317 	if (os.data)
318 		{
319         	if (os.length > SSL_MAX_KRB5_PRINCIPAL_LENGTH)
320             		ret->krb5_client_princ_len=0;
321 		else
322 			ret->krb5_client_princ_len=os.length;
323 		memcpy(ret->krb5_client_princ,os.data,ret->krb5_client_princ_len);
324 		OPENSSL_free(os.data);
325 		os.data = NULL;
326 		os.length = 0;
327 		}
328 	else
329 		ret->krb5_client_princ_len=0;
330 #endif /* OPENSSL_NO_KRB5 */
331 
332 	M_ASN1_D2I_get_IMP_opt(osp,d2i_ASN1_OCTET_STRING,0,V_ASN1_OCTET_STRING);
333 	if (os.length > SSL_MAX_KEY_ARG_LENGTH)
334 		ret->key_arg_length=SSL_MAX_KEY_ARG_LENGTH;
335 	else
336 		ret->key_arg_length=os.length;
337 	memcpy(ret->key_arg,os.data,ret->key_arg_length);
338 	if (os.data != NULL) OPENSSL_free(os.data);
339 
340 	ai.length=0;
341 	M_ASN1_D2I_get_EXP_opt(aip,d2i_ASN1_INTEGER,1);
342 	if (ai.data != NULL)
343 		{
344 		ret->time=ASN1_INTEGER_get(aip);
345 		OPENSSL_free(ai.data); ai.data=NULL; ai.length=0;
346 		}
347 	else
348 		ret->time=time(NULL);
349 
350 	ai.length=0;
351 	M_ASN1_D2I_get_EXP_opt(aip,d2i_ASN1_INTEGER,2);
352 	if (ai.data != NULL)
353 		{
354 		ret->timeout=ASN1_INTEGER_get(aip);
355 		OPENSSL_free(ai.data); ai.data=NULL; ai.length=0;
356 		}
357 	else
358 		ret->timeout=3;
359 
360 	if (ret->peer != NULL)
361 		{
362 		X509_free(ret->peer);
363 		ret->peer=NULL;
364 		}
365 	M_ASN1_D2I_get_EXP_opt(ret->peer,d2i_X509,3);
366 
367 	os.length=0;
368 	os.data=NULL;
369 	M_ASN1_D2I_get_EXP_opt(osp,d2i_ASN1_OCTET_STRING,4);
370 
371 	if(os.data != NULL)
372 	    {
373 	    if (os.length > SSL_MAX_SID_CTX_LENGTH)
374 		{
375 		ret->sid_ctx_length=os.length;
376 		SSLerr(SSL_F_D2I_SSL_SESSION,SSL_R_BAD_LENGTH);
377 		}
378 	    else
379 		{
380 		ret->sid_ctx_length=os.length;
381 		memcpy(ret->sid_ctx,os.data,os.length);
382 		}
383 	    OPENSSL_free(os.data); os.data=NULL; os.length=0;
384 	    }
385 	else
386 	    ret->sid_ctx_length=0;
387 
388 	ai.length=0;
389 	M_ASN1_D2I_get_EXP_opt(aip,d2i_ASN1_INTEGER,5);
390 	if (ai.data != NULL)
391 		{
392 		ret->verify_result=ASN1_INTEGER_get(aip);
393 		OPENSSL_free(ai.data); ai.data=NULL; ai.length=0;
394 		}
395 	else
396 		ret->verify_result=X509_V_OK;
397 
398 	M_ASN1_D2I_Finish(a,SSL_SESSION_free,SSL_F_D2I_SSL_SESSION);
399 	}
400