summaryrefslogtreecommitdiff
path: root/lib/libssl/ssl3.h
blob: 634417610503af405a427dcd00033ab2e0ba757e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
/* $OpenBSD: ssl3.h,v 1.44 2017/01/22 03:50:45 jsing Exp $ */
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
 * All rights reserved.
 *
 * This package is an SSL implementation written
 * by Eric Young (eay@cryptsoft.com).
 * The implementation was written so as to conform with Netscapes SSL.
 *
 * This library is free for commercial and non-commercial use as long as
 * the following conditions are aheared to.  The following conditions
 * apply to all code found in this distribution, be it the RC4, RSA,
 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
 * included with this distribution is covered by the same copyright terms
 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
 *
 * Copyright remains Eric Young's, and as such any Copyright notices in
 * the code are not to be removed.
 * If this package is used in a product, Eric Young should be given attribution
 * as the author of the parts of the library used.
 * This can be in the form of a textual message at program startup or
 * in documentation (online or textual) provided with the package.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *    "This product includes cryptographic software written by
 *     Eric Young (eay@cryptsoft.com)"
 *    The word 'cryptographic' can be left out if the rouines from the library
 *    being used are not cryptographic related :-).
 * 4. If you include any Windows specific code (or a derivative thereof) from
 *    the apps directory (application code) you must include an acknowledgement:
 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
 *
 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * The licence and distribution terms for any publically available version or
 * derivative of this code cannot be changed.  i.e. this code cannot simply be
 * copied and put under another distribution licence
 * [including the GNU Public Licence.]
 */
/* ====================================================================
 * Copyright (c) 1998-2002 The OpenSSL Project.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. All advertising materials mentioning features or use of this
 *    software must display the following acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
 *
 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
 *    endorse or promote products derived from this software without
 *    prior written permission. For written permission, please contact
 *    openssl-core@openssl.org.
 *
 * 5. Products derived from this software may not be called "OpenSSL"
 *    nor may "OpenSSL" appear in their names without prior written
 *    permission of the OpenSSL Project.
 *
 * 6. Redistributions of any form whatsoever must retain the following
 *    acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
 *
 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 * ====================================================================
 *
 * This product includes cryptographic software written by Eric Young
 * (eay@cryptsoft.com).  This product includes software written by Tim
 * Hudson (tjh@cryptsoft.com).
 *
 */
/* ====================================================================
 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
 * ECC cipher suite support in OpenSSL originally developed by
 * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
 */

#ifndef HEADER_SSL3_H
#define HEADER_SSL3_H

#include <openssl/opensslconf.h>
#include <openssl/buffer.h>
#include <openssl/evp.h>
#include <openssl/ssl.h>

#ifdef  __cplusplus
extern "C" {
#endif

/* TLS_EMPTY_RENEGOTIATION_INFO_SCSV from RFC 5746. */
#define SSL3_CK_SCSV				0x030000FF

/* TLS_FALLBACK_SCSV from draft-ietf-tls-downgrade-scsv-03. */
#define SSL3_CK_FALLBACK_SCSV			0x03005600

#define SSL3_CK_RSA_NULL_MD5			0x03000001
#define SSL3_CK_RSA_NULL_SHA			0x03000002
#define SSL3_CK_RSA_RC4_40_MD5 			0x03000003
#define SSL3_CK_RSA_RC4_128_MD5			0x03000004
#define SSL3_CK_RSA_RC4_128_SHA			0x03000005
#define SSL3_CK_RSA_RC2_40_MD5			0x03000006
#define SSL3_CK_RSA_IDEA_128_SHA		0x03000007
#define SSL3_CK_RSA_DES_40_CBC_SHA		0x03000008
#define SSL3_CK_RSA_DES_64_CBC_SHA		0x03000009
#define SSL3_CK_RSA_DES_192_CBC3_SHA		0x0300000A

#define SSL3_CK_DH_DSS_DES_40_CBC_SHA		0x0300000B
#define SSL3_CK_DH_DSS_DES_64_CBC_SHA		0x0300000C
#define SSL3_CK_DH_DSS_DES_192_CBC3_SHA 	0x0300000D
#define SSL3_CK_DH_RSA_DES_40_CBC_SHA		0x0300000E
#define SSL3_CK_DH_RSA_DES_64_CBC_SHA		0x0300000F
#define SSL3_CK_DH_RSA_DES_192_CBC3_SHA 	0x03000010

#define SSL3_CK_EDH_DSS_DES_40_CBC_SHA		0x03000011
#define SSL3_CK_EDH_DSS_DES_64_CBC_SHA		0x03000012
#define SSL3_CK_EDH_DSS_DES_192_CBC3_SHA	0x03000013
#define SSL3_CK_EDH_RSA_DES_40_CBC_SHA		0x03000014
#define SSL3_CK_EDH_RSA_DES_64_CBC_SHA		0x03000015
#define SSL3_CK_EDH_RSA_DES_192_CBC3_SHA	0x03000016

#define SSL3_CK_ADH_RC4_40_MD5			0x03000017
#define SSL3_CK_ADH_RC4_128_MD5			0x03000018
#define SSL3_CK_ADH_DES_40_CBC_SHA		0x03000019
#define SSL3_CK_ADH_DES_64_CBC_SHA		0x0300001A
#define SSL3_CK_ADH_DES_192_CBC_SHA		0x0300001B

/*    VRS Additional Kerberos5 entries
 */
#define SSL3_CK_KRB5_DES_64_CBC_SHA		0x0300001E
#define SSL3_CK_KRB5_DES_192_CBC3_SHA		0x0300001F
#define SSL3_CK_KRB5_RC4_128_SHA		0x03000020
#define SSL3_CK_KRB5_IDEA_128_CBC_SHA	       	0x03000021
#define SSL3_CK_KRB5_DES_64_CBC_MD5       	0x03000022
#define SSL3_CK_KRB5_DES_192_CBC3_MD5       	0x03000023
#define SSL3_CK_KRB5_RC4_128_MD5	       	0x03000024
#define SSL3_CK_KRB5_IDEA_128_CBC_MD5 		0x03000025

#define SSL3_CK_KRB5_DES_40_CBC_SHA 		0x03000026
#define SSL3_CK_KRB5_RC2_40_CBC_SHA 		0x03000027
#define SSL3_CK_KRB5_RC4_40_SHA	 		0x03000028
#define SSL3_CK_KRB5_DES_40_CBC_MD5 		0x03000029
#define SSL3_CK_KRB5_RC2_40_CBC_MD5 		0x0300002A
#define SSL3_CK_KRB5_RC4_40_MD5	 		0x0300002B

#define SSL3_TXT_RSA_NULL_MD5			"NULL-MD5"
#define SSL3_TXT_RSA_NULL_SHA			"NULL-SHA"
#define SSL3_TXT_RSA_RC4_40_MD5 		"EXP-RC4-MD5"
#define SSL3_TXT_RSA_RC4_128_MD5		"RC4-MD5"
#define SSL3_TXT_RSA_RC4_128_SHA		"RC4-SHA"
#define SSL3_TXT_RSA_RC2_40_MD5			"EXP-RC2-CBC-MD5"
#define SSL3_TXT_RSA_IDEA_128_SHA		"IDEA-CBC-SHA"
#define SSL3_TXT_RSA_DES_40_CBC_SHA		"EXP-DES-CBC-SHA"
#define SSL3_TXT_RSA_DES_64_CBC_SHA		"DES-CBC-SHA"
#define SSL3_TXT_RSA_DES_192_CBC3_SHA		"DES-CBC3-SHA"

#define SSL3_TXT_DH_DSS_DES_40_CBC_SHA		"EXP-DH-DSS-DES-CBC-SHA"
#define SSL3_TXT_DH_DSS_DES_64_CBC_SHA		"DH-DSS-DES-CBC-SHA"
#define SSL3_TXT_DH_DSS_DES_192_CBC3_SHA 	"DH-DSS-DES-CBC3-SHA"
#define SSL3_TXT_DH_RSA_DES_40_CBC_SHA		"EXP-DH-RSA-DES-CBC-SHA"
#define SSL3_TXT_DH_RSA_DES_64_CBC_SHA		"DH-RSA-DES-CBC-SHA"
#define SSL3_TXT_DH_RSA_DES_192_CBC3_SHA 	"DH-RSA-DES-CBC3-SHA"

#define SSL3_TXT_EDH_DSS_DES_40_CBC_SHA		"EXP-EDH-DSS-DES-CBC-SHA"
#define SSL3_TXT_EDH_DSS_DES_64_CBC_SHA		"EDH-DSS-DES-CBC-SHA"
#define SSL3_TXT_EDH_DSS_DES_192_CBC3_SHA	"EDH-DSS-DES-CBC3-SHA"
#define SSL3_TXT_EDH_RSA_DES_40_CBC_SHA		"EXP-EDH-RSA-DES-CBC-SHA"
#define SSL3_TXT_EDH_RSA_DES_64_CBC_SHA		"EDH-RSA-DES-CBC-SHA"
#define SSL3_TXT_EDH_RSA_DES_192_CBC3_SHA	"EDH-RSA-DES-CBC3-SHA"

#define SSL3_TXT_ADH_RC4_40_MD5			"EXP-ADH-RC4-MD5"
#define SSL3_TXT_ADH_RC4_128_MD5		"ADH-RC4-MD5"
#define SSL3_TXT_ADH_DES_40_CBC_SHA		"EXP-ADH-DES-CBC-SHA"
#define SSL3_TXT_ADH_DES_64_CBC_SHA		"ADH-DES-CBC-SHA"
#define SSL3_TXT_ADH_DES_192_CBC_SHA		"ADH-DES-CBC3-SHA"

#define SSL3_TXT_KRB5_DES_64_CBC_SHA		"KRB5-DES-CBC-SHA"
#define SSL3_TXT_KRB5_DES_192_CBC3_SHA		"KRB5-DES-CBC3-SHA"
#define SSL3_TXT_KRB5_RC4_128_SHA		"KRB5-RC4-SHA"
#define SSL3_TXT_KRB5_IDEA_128_CBC_SHA	       	"KRB5-IDEA-CBC-SHA"
#define SSL3_TXT_KRB5_DES_64_CBC_MD5       	"KRB5-DES-CBC-MD5"
#define SSL3_TXT_KRB5_DES_192_CBC3_MD5       	"KRB5-DES-CBC3-MD5"
#define SSL3_TXT_KRB5_RC4_128_MD5		"KRB5-RC4-MD5"
#define SSL3_TXT_KRB5_IDEA_128_CBC_MD5 		"KRB5-IDEA-CBC-MD5"

#define SSL3_TXT_KRB5_DES_40_CBC_SHA 		"EXP-KRB5-DES-CBC-SHA"
#define SSL3_TXT_KRB5_RC2_40_CBC_SHA 		"EXP-KRB5-RC2-CBC-SHA"
#define SSL3_TXT_KRB5_RC4_40_SHA	 	"EXP-KRB5-RC4-SHA"
#define SSL3_TXT_KRB5_DES_40_CBC_MD5 		"EXP-KRB5-DES-CBC-MD5"
#define SSL3_TXT_KRB5_RC2_40_CBC_MD5 		"EXP-KRB5-RC2-CBC-MD5"
#define SSL3_TXT_KRB5_RC4_40_MD5	 	"EXP-KRB5-RC4-MD5"

#define SSL3_SSL_SESSION_ID_LENGTH		32
#define SSL3_MAX_SSL_SESSION_ID_LENGTH		32

#define SSL3_MASTER_SECRET_SIZE			48
#define SSL3_RANDOM_SIZE			32
#define SSL3_SEQUENCE_SIZE			8
#define SSL3_SESSION_ID_SIZE			32
#define SSL3_CIPHER_VALUE_SIZE			2

#define SSL3_RT_HEADER_LENGTH			5
#define SSL3_HM_HEADER_LENGTH			4

#define SSL3_ALIGN_PAYLOAD			8

/* This is the maximum MAC (digest) size used by the SSL library.
 * Currently maximum of 20 is used by SHA1, but we reserve for
 * future extension for 512-bit hashes.
 */

#define SSL3_RT_MAX_MD_SIZE			64

/* Maximum block size used in all ciphersuites. Currently 16 for AES.
 */

#define	SSL_RT_MAX_CIPHER_BLOCK_SIZE		16

#define SSL3_RT_MAX_EXTRA			(16384)

/* Maximum plaintext length: defined by SSL/TLS standards */
#define SSL3_RT_MAX_PLAIN_LENGTH		16384
/* Maximum compression overhead: defined by SSL/TLS standards */
#define SSL3_RT_MAX_COMPRESSED_OVERHEAD		1024

/* The standards give a maximum encryption overhead of 1024 bytes.
 * In practice the value is lower than this. The overhead is the maximum
 * number of padding bytes (256) plus the mac size.
 */
#define SSL3_RT_MAX_ENCRYPTED_OVERHEAD	(256 + SSL3_RT_MAX_MD_SIZE)

/* OpenSSL currently only uses a padding length of at most one block so
 * the send overhead is smaller.
 */

#define SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD \
			(SSL_RT_MAX_CIPHER_BLOCK_SIZE + SSL3_RT_MAX_MD_SIZE)

/* If compression isn't used don't include the compression overhead */
#define SSL3_RT_MAX_COMPRESSED_LENGTH		SSL3_RT_MAX_PLAIN_LENGTH
#define SSL3_RT_MAX_ENCRYPTED_LENGTH	\
		(SSL3_RT_MAX_ENCRYPTED_OVERHEAD+SSL3_RT_MAX_COMPRESSED_LENGTH)
#define SSL3_RT_MAX_PACKET_SIZE		\
		(SSL3_RT_MAX_ENCRYPTED_LENGTH+SSL3_RT_HEADER_LENGTH)

#define SSL3_MD_CLIENT_FINISHED_CONST	"\x43\x4C\x4E\x54"
#define SSL3_MD_SERVER_FINISHED_CONST	"\x53\x52\x56\x52"

#define SSL3_VERSION			0x0300
#define SSL3_VERSION_MAJOR		0x03
#define SSL3_VERSION_MINOR		0x00

#define SSL3_RT_CHANGE_CIPHER_SPEC	20
#define SSL3_RT_ALERT			21
#define SSL3_RT_HANDSHAKE		22
#define SSL3_RT_APPLICATION_DATA	23
#define TLS1_RT_HEARTBEAT		24

#define SSL3_AL_WARNING			1
#define SSL3_AL_FATAL			2

#define SSL3_AD_CLOSE_NOTIFY		 0
#define SSL3_AD_UNEXPECTED_MESSAGE	10	/* fatal */
#define SSL3_AD_BAD_RECORD_MAC		20	/* fatal */
#define SSL3_AD_DECOMPRESSION_FAILURE	30	/* fatal */
#define SSL3_AD_HANDSHAKE_FAILURE	40	/* fatal */
#define SSL3_AD_NO_CERTIFICATE		41
#define SSL3_AD_BAD_CERTIFICATE		42
#define SSL3_AD_UNSUPPORTED_CERTIFICATE	43
#define SSL3_AD_CERTIFICATE_REVOKED	44
#define SSL3_AD_CERTIFICATE_EXPIRED	45
#define SSL3_AD_CERTIFICATE_UNKNOWN	46
#define SSL3_AD_ILLEGAL_PARAMETER	47	/* fatal */

#define TLS1_HB_REQUEST		1
#define TLS1_HB_RESPONSE	2

#ifndef OPENSSL_NO_SSL_INTERN

typedef struct ssl3_record_st {
/*r */	int type;               /* type of record */
/*rw*/	unsigned int length;    /* How many bytes available */
/*r */	unsigned int off;       /* read/write offset into 'buf' */
/*rw*/	unsigned char *data;    /* pointer to the record data */
/*rw*/	unsigned char *input;   /* where the decode bytes are */
/*r */  unsigned long epoch;    /* epoch number, needed by DTLS1 */
/*r */  unsigned char seq_num[8]; /* sequence number, needed by DTLS1 */
} SSL3_RECORD;

typedef struct ssl3_buffer_st {
	unsigned char *buf;	/* at least SSL3_RT_MAX_PACKET_SIZE bytes,
	                         * see ssl3_setup_buffers() */
	size_t len;		/* buffer size */
	int offset;		/* where to 'copy from' */
	int left;		/* how many bytes left */
} SSL3_BUFFER;

#endif

#define SSL3_CT_RSA_SIGN			1
#define SSL3_CT_DSS_SIGN			2
#define SSL3_CT_RSA_FIXED_DH			3
#define SSL3_CT_DSS_FIXED_DH			4
#define SSL3_CT_RSA_EPHEMERAL_DH		5
#define SSL3_CT_DSS_EPHEMERAL_DH		6
#define SSL3_CT_FORTEZZA_DMS			20
/* SSL3_CT_NUMBER is used to size arrays and it must be large
 * enough to contain all of the cert types defined either for
 * SSLv3 and TLSv1.
 */
#define SSL3_CT_NUMBER			11


#define SSL3_FLAGS_NO_RENEGOTIATE_CIPHERS	0x0001
#define SSL3_FLAGS_DELAY_CLIENT_FINISHED	0x0002
#define SSL3_FLAGS_POP_BUFFER			0x0004
#define TLS1_FLAGS_TLS_PADDING_BUG		0x0
#define TLS1_FLAGS_SKIP_CERT_VERIFY		0x0010
#define TLS1_FLAGS_KEEP_HANDSHAKE		0x0020
#define SSL3_FLAGS_CCS_OK			0x0080

#ifndef OPENSSL_NO_SSL_INTERN

struct ssl3_state_internal_st;

typedef struct ssl3_state_st {
	long flags;
	int delay_buf_pop_ret;

	unsigned char read_sequence[SSL3_SEQUENCE_SIZE];
	int read_mac_secret_size;
	unsigned char read_mac_secret[EVP_MAX_MD_SIZE];
	unsigned char write_sequence[SSL3_SEQUENCE_SIZE];
	int write_mac_secret_size;
	unsigned char write_mac_secret[EVP_MAX_MD_SIZE];

	unsigned char server_random[SSL3_RANDOM_SIZE];
	unsigned char client_random[SSL3_RANDOM_SIZE];

	/* flags for countermeasure against known-IV weakness */
	int need_empty_fragments;
	int empty_fragment_done;

	SSL3_BUFFER rbuf;	/* read IO goes into here */
	SSL3_BUFFER wbuf;	/* write IO goes into here */

	SSL3_RECORD rrec;	/* each decoded record goes in here */
	SSL3_RECORD wrec;	/* goes out from here */

	/* storage for Alert/Handshake protocol data received but not
	 * yet processed by ssl3_read_bytes: */
	unsigned char alert_fragment[2];
	unsigned int alert_fragment_len;
	unsigned char handshake_fragment[4];
	unsigned int handshake_fragment_len;

	/* partial write - check the numbers match */
	unsigned int wnum;	/* number of bytes sent so far */
	int wpend_tot;		/* number bytes written */
	int wpend_type;
	int wpend_ret;		/* number of bytes submitted */
	const unsigned char *wpend_buf;

	/* used during startup, digest all incoming/outgoing packets */
	BIO *handshake_buffer;
	/* When set of handshake digests is determined, buffer is hashed
	 * and freed and MD_CTX-es for all required digests are stored in
	 * this array */
	EVP_MD_CTX **handshake_dgst;
	/* this is set whenerver we see a change_cipher_spec message
	 * come in when we are not looking for one */
	int change_cipher_spec;

	int warn_alert;
	int fatal_alert;
	/* we allow one fatal and one warning alert to be outstanding,
	 * send close alert via the warning alert */
	int alert_dispatch;
	unsigned char send_alert[2];

	/* This flag is set when we should renegotiate ASAP, basically when
	 * there is no more data in the read or write buffers */
	int renegotiate;
	int total_renegotiations;
	int num_renegotiations;

	int in_read_app_data;

	struct	{
		/* actually only needs to be 16+20 */
		unsigned char cert_verify_md[EVP_MAX_MD_SIZE*2];

		/* actually only need to be 16+20 for SSLv3 and 12 for TLS */
		unsigned char finish_md[EVP_MAX_MD_SIZE*2];
		int finish_md_len;
		unsigned char peer_finish_md[EVP_MAX_MD_SIZE*2];
		int peer_finish_md_len;

		unsigned long message_size;
		int message_type;

		/* used to hold the new cipher we are going to use */
		const SSL_CIPHER *new_cipher;
		DH *dh;

		EC_KEY *ecdh; /* holds short lived ECDH key */

		uint8_t *x25519;

		/* used when SSL_ST_FLUSH_DATA is entered */
		int next_state;

		int reuse_message;

		/* used for certificate requests */
		int cert_req;
		int ctype_num;
		char ctype[SSL3_CT_NUMBER];
		STACK_OF(X509_NAME) *ca_names;

		int key_block_length;
		unsigned char *key_block;

		const EVP_CIPHER *new_sym_enc;
		const EVP_AEAD *new_aead;
		const EVP_MD *new_hash;
		int new_mac_pkey_type;
		int new_mac_secret_size;
		int cert_request;
	} tmp;

	/* Connection binding to prevent renegotiation attacks */
	unsigned char previous_client_finished[EVP_MAX_MD_SIZE];
	unsigned char previous_client_finished_len;
	unsigned char previous_server_finished[EVP_MAX_MD_SIZE];
	unsigned char previous_server_finished_len;
	int send_connection_binding; /* TODOEKR */

	/* Set if we saw the Next Protocol Negotiation extension from our peer.
	 */
	int next_proto_neg_seen;

	/*
	 * ALPN information
	 * (we are in the process of transitioning from NPN to ALPN).
	 */

	/*
	 * In a server these point to the selected ALPN protocol after the
	 * ClientHello has been processed. In a client these contain the
	 * protocol that the server selected once the ServerHello has been
	 * processed.
	 */
	unsigned char *alpn_selected;
	unsigned int alpn_selected_len;

	struct ssl3_state_internal_st *internal;
} SSL3_STATE;

#endif

/* SSLv3 */
/*client */
/* extra state */
#define SSL3_ST_CW_FLUSH			(0x100|SSL_ST_CONNECT)
/* write to server */
#define SSL3_ST_CW_CLNT_HELLO_A			(0x110|SSL_ST_CONNECT)
#define SSL3_ST_CW_CLNT_HELLO_B			(0x111|SSL_ST_CONNECT)
/* read from server */
#define SSL3_ST_CR_SRVR_HELLO_A			(0x120|SSL_ST_CONNECT)
#define SSL3_ST_CR_SRVR_HELLO_B			(0x121|SSL_ST_CONNECT)
#define DTLS1_ST_CR_HELLO_VERIFY_REQUEST_A	(0x126|SSL_ST_CONNECT)
#define DTLS1_ST_CR_HELLO_VERIFY_REQUEST_B	(0x127|SSL_ST_CONNECT)
#define SSL3_ST_CR_CERT_A			(0x130|SSL_ST_CONNECT)
#define SSL3_ST_CR_CERT_B			(0x131|SSL_ST_CONNECT)
#define SSL3_ST_CR_KEY_EXCH_A			(0x140|SSL_ST_CONNECT)
#define SSL3_ST_CR_KEY_EXCH_B			(0x141|SSL_ST_CONNECT)
#define SSL3_ST_CR_CERT_REQ_A			(0x150|SSL_ST_CONNECT)
#define SSL3_ST_CR_CERT_REQ_B			(0x151|SSL_ST_CONNECT)
#define SSL3_ST_CR_SRVR_DONE_A			(0x160|SSL_ST_CONNECT)
#define SSL3_ST_CR_SRVR_DONE_B			(0x161|SSL_ST_CONNECT)
/* write to server */
#define SSL3_ST_CW_CERT_A			(0x170|SSL_ST_CONNECT)
#define SSL3_ST_CW_CERT_B			(0x171|SSL_ST_CONNECT)
#define SSL3_ST_CW_CERT_C			(0x172|SSL_ST_CONNECT)
#define SSL3_ST_CW_CERT_D			(0x173|SSL_ST_CONNECT)
#define SSL3_ST_CW_KEY_EXCH_A			(0x180|SSL_ST_CONNECT)
#define SSL3_ST_CW_KEY_EXCH_B			(0x181|SSL_ST_CONNECT)
#define SSL3_ST_CW_CERT_VRFY_A			(0x190|SSL_ST_CONNECT)
#define SSL3_ST_CW_CERT_VRFY_B			(0x191|SSL_ST_CONNECT)
#define SSL3_ST_CW_CHANGE_A			(0x1A0|SSL_ST_CONNECT)
#define SSL3_ST_CW_CHANGE_B			(0x1A1|SSL_ST_CONNECT)
#define SSL3_ST_CW_NEXT_PROTO_A			(0x200|SSL_ST_CONNECT)
#define SSL3_ST_CW_NEXT_PROTO_B			(0x201|SSL_ST_CONNECT)
#define SSL3_ST_CW_FINISHED_A			(0x1B0|SSL_ST_CONNECT)
#define SSL3_ST_CW_FINISHED_B			(0x1B1|SSL_ST_CONNECT)
/* read from server */
#define SSL3_ST_CR_CHANGE_A			(0x1C0|SSL_ST_CONNECT)
#define SSL3_ST_CR_CHANGE_B			(0x1C1|SSL_ST_CONNECT)
#define SSL3_ST_CR_FINISHED_A			(0x1D0|SSL_ST_CONNECT)
#define SSL3_ST_CR_FINISHED_B			(0x1D1|SSL_ST_CONNECT)
#define SSL3_ST_CR_SESSION_TICKET_A		(0x1E0|SSL_ST_CONNECT)
#define SSL3_ST_CR_SESSION_TICKET_B		(0x1E1|SSL_ST_CONNECT)
#define SSL3_ST_CR_CERT_STATUS_A		(0x1F0|SSL_ST_CONNECT)
#define SSL3_ST_CR_CERT_STATUS_B		(0x1F1|SSL_ST_CONNECT)

/* server */
/* extra state */
#define SSL3_ST_SW_FLUSH			(0x100|SSL_ST_ACCEPT)
/* read from client */
/* Do not change the number values, they do matter */
#define SSL3_ST_SR_CLNT_HELLO_A			(0x110|SSL_ST_ACCEPT)
#define SSL3_ST_SR_CLNT_HELLO_B			(0x111|SSL_ST_ACCEPT)
#define SSL3_ST_SR_CLNT_HELLO_C			(0x112|SSL_ST_ACCEPT)
/* write to client */
#define DTLS1_ST_SW_HELLO_VERIFY_REQUEST_A	(0x113|SSL_ST_ACCEPT)
#define DTLS1_ST_SW_HELLO_VERIFY_REQUEST_B	(0x114|SSL_ST_ACCEPT)
#define SSL3_ST_SW_HELLO_REQ_A			(0x120|SSL_ST_ACCEPT)
#define SSL3_ST_SW_HELLO_REQ_B			(0x121|SSL_ST_ACCEPT)
#define SSL3_ST_SW_HELLO_REQ_C			(0x122|SSL_ST_ACCEPT)
#define SSL3_ST_SW_SRVR_HELLO_A			(0x130|SSL_ST_ACCEPT)
#define SSL3_ST_SW_SRVR_HELLO_B			(0x131|SSL_ST_ACCEPT)
#define SSL3_ST_SW_CERT_A			(0x140|SSL_ST_ACCEPT)
#define SSL3_ST_SW_CERT_B			(0x141|SSL_ST_ACCEPT)
#define SSL3_ST_SW_KEY_EXCH_A			(0x150|SSL_ST_ACCEPT)
#define SSL3_ST_SW_KEY_EXCH_B			(0x151|SSL_ST_ACCEPT)
#define SSL3_ST_SW_CERT_REQ_A			(0x160|SSL_ST_ACCEPT)
#define SSL3_ST_SW_CERT_REQ_B			(0x161|SSL_ST_ACCEPT)
#define SSL3_ST_SW_SRVR_DONE_A			(0x170|SSL_ST_ACCEPT)
#define SSL3_ST_SW_SRVR_DONE_B			(0x171|SSL_ST_ACCEPT)
/* read from client */
#define SSL3_ST_SR_CERT_A			(0x180|SSL_ST_ACCEPT)
#define SSL3_ST_SR_CERT_B			(0x181|SSL_ST_ACCEPT)
#define SSL3_ST_SR_KEY_EXCH_A			(0x190|SSL_ST_ACCEPT)
#define SSL3_ST_SR_KEY_EXCH_B			(0x191|SSL_ST_ACCEPT)
#define SSL3_ST_SR_CERT_VRFY_A			(0x1A0|SSL_ST_ACCEPT)
#define SSL3_ST_SR_CERT_VRFY_B			(0x1A1|SSL_ST_ACCEPT)
#define SSL3_ST_SR_CHANGE_A			(0x1B0|SSL_ST_ACCEPT)
#define SSL3_ST_SR_CHANGE_B			(0x1B1|SSL_ST_ACCEPT)
#define SSL3_ST_SR_NEXT_PROTO_A			(0x210|SSL_ST_ACCEPT)
#define SSL3_ST_SR_NEXT_PROTO_B			(0x211|SSL_ST_ACCEPT)
#define SSL3_ST_SR_FINISHED_A			(0x1C0|SSL_ST_ACCEPT)
#define SSL3_ST_SR_FINISHED_B			(0x1C1|SSL_ST_ACCEPT)
/* write to client */
#define SSL3_ST_SW_CHANGE_A			(0x1D0|SSL_ST_ACCEPT)
#define SSL3_ST_SW_CHANGE_B			(0x1D1|SSL_ST_ACCEPT)
#define SSL3_ST_SW_FINISHED_A			(0x1E0|SSL_ST_ACCEPT)
#define SSL3_ST_SW_FINISHED_B			(0x1E1|SSL_ST_ACCEPT)
#define SSL3_ST_SW_SESSION_TICKET_A		(0x1F0|SSL_ST_ACCEPT)
#define SSL3_ST_SW_SESSION_TICKET_B		(0x1F1|SSL_ST_ACCEPT)
#define SSL3_ST_SW_CERT_STATUS_A		(0x200|SSL_ST_ACCEPT)
#define SSL3_ST_SW_CERT_STATUS_B		(0x201|SSL_ST_ACCEPT)

#define SSL3_MT_HELLO_REQUEST			0
#define SSL3_MT_CLIENT_HELLO			1
#define SSL3_MT_SERVER_HELLO			2
#define	SSL3_MT_NEWSESSION_TICKET		4
#define SSL3_MT_CERTIFICATE			11
#define SSL3_MT_SERVER_KEY_EXCHANGE		12
#define SSL3_MT_CERTIFICATE_REQUEST		13
#define SSL3_MT_SERVER_DONE			14
#define SSL3_MT_CERTIFICATE_VERIFY		15
#define SSL3_MT_CLIENT_KEY_EXCHANGE		16
#define SSL3_MT_FINISHED			20
#define SSL3_MT_CERTIFICATE_STATUS		22

#define SSL3_MT_NEXT_PROTO			67

#define DTLS1_MT_HELLO_VERIFY_REQUEST		3

#define SSL3_MT_CCS				1

/* These are used when changing over to a new cipher */
#define SSL3_CC_READ		0x01
#define SSL3_CC_WRITE		0x02
#define SSL3_CC_CLIENT		0x10
#define SSL3_CC_SERVER		0x20
#define SSL3_CHANGE_CIPHER_CLIENT_WRITE		(SSL3_CC_CLIENT|SSL3_CC_WRITE)
#define SSL3_CHANGE_CIPHER_SERVER_READ		(SSL3_CC_SERVER|SSL3_CC_READ)
#define SSL3_CHANGE_CIPHER_CLIENT_READ		(SSL3_CC_CLIENT|SSL3_CC_READ)
#define SSL3_CHANGE_CIPHER_SERVER_WRITE		(SSL3_CC_SERVER|SSL3_CC_WRITE)

#ifdef  __cplusplus
}
#endif
#endif