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Adam Langley95c29f32014-06-20 12:00:00 -07001/* ssl/ssl3.h */
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 * Copyright (c) 1998-2002 The OpenSSL Project. All rights reserved.
60 *
61 * Redistribution and use in source and binary forms, with or without
62 * modification, are permitted provided that the following conditions
63 * are met:
64 *
65 * 1. Redistributions of source code must retain the above copyright
66 * notice, this list of conditions and the following disclaimer.
67 *
68 * 2. Redistributions in binary form must reproduce the above copyright
69 * notice, this list of conditions and the following disclaimer in
70 * the documentation and/or other materials provided with the
71 * distribution.
72 *
73 * 3. All advertising materials mentioning features or use of this
74 * software must display the following acknowledgment:
75 * "This product includes software developed by the OpenSSL Project
76 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
77 *
78 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
79 * endorse or promote products derived from this software without
80 * prior written permission. For written permission, please contact
81 * openssl-core@openssl.org.
82 *
83 * 5. Products derived from this software may not be called "OpenSSL"
84 * nor may "OpenSSL" appear in their names without prior written
85 * permission of the OpenSSL Project.
86 *
87 * 6. Redistributions of any form whatsoever must retain the following
88 * acknowledgment:
89 * "This product includes software developed by the OpenSSL Project
90 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
91 *
92 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
93 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
94 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
95 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
96 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
97 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
98 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
99 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
100 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
101 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
102 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
103 * OF THE POSSIBILITY OF SUCH DAMAGE.
104 * ====================================================================
105 *
106 * This product includes cryptographic software written by Eric Young
107 * (eay@cryptsoft.com). This product includes software written by Tim
108 * Hudson (tjh@cryptsoft.com).
109 *
110 */
111/* ====================================================================
112 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
113 * ECC cipher suite support in OpenSSL originally developed by
114 * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
115 */
116
117#ifndef HEADER_SSL3_H
118#define HEADER_SSL3_H
119
120#include <openssl/buf.h>
121#include <openssl/evp.h>
122#include <openssl/ssl.h>
123
124#ifdef __cplusplus
125extern "C" {
126#endif
127
128/* Signalling cipher suite value: from draft-ietf-tls-renegotiation-03.txt */
129#define SSL3_CK_SCSV 0x030000FF
130
131#define SSL3_CK_RSA_NULL_MD5 0x03000001
132#define SSL3_CK_RSA_NULL_SHA 0x03000002
133#define SSL3_CK_RSA_RC4_40_MD5 0x03000003
134#define SSL3_CK_RSA_RC4_128_MD5 0x03000004
135#define SSL3_CK_RSA_RC4_128_SHA 0x03000005
136#define SSL3_CK_RSA_RC2_40_MD5 0x03000006
137#define SSL3_CK_RSA_IDEA_128_SHA 0x03000007
138#define SSL3_CK_RSA_DES_40_CBC_SHA 0x03000008
139#define SSL3_CK_RSA_DES_64_CBC_SHA 0x03000009
140#define SSL3_CK_RSA_DES_192_CBC3_SHA 0x0300000A
141
142#define SSL3_CK_DH_DSS_DES_40_CBC_SHA 0x0300000B
143#define SSL3_CK_DH_DSS_DES_64_CBC_SHA 0x0300000C
144#define SSL3_CK_DH_DSS_DES_192_CBC3_SHA 0x0300000D
145#define SSL3_CK_DH_RSA_DES_40_CBC_SHA 0x0300000E
146#define SSL3_CK_DH_RSA_DES_64_CBC_SHA 0x0300000F
147#define SSL3_CK_DH_RSA_DES_192_CBC3_SHA 0x03000010
148
149#define SSL3_CK_EDH_DSS_DES_40_CBC_SHA 0x03000011
150#define SSL3_CK_EDH_DSS_DES_64_CBC_SHA 0x03000012
151#define SSL3_CK_EDH_DSS_DES_192_CBC3_SHA 0x03000013
152#define SSL3_CK_EDH_RSA_DES_40_CBC_SHA 0x03000014
153#define SSL3_CK_EDH_RSA_DES_64_CBC_SHA 0x03000015
154#define SSL3_CK_EDH_RSA_DES_192_CBC3_SHA 0x03000016
155
156#define SSL3_CK_ADH_RC4_40_MD5 0x03000017
157#define SSL3_CK_ADH_RC4_128_MD5 0x03000018
158#define SSL3_CK_ADH_DES_40_CBC_SHA 0x03000019
159#define SSL3_CK_ADH_DES_64_CBC_SHA 0x0300001A
160#define SSL3_CK_ADH_DES_192_CBC_SHA 0x0300001B
161
162#if 0
163 #define SSL3_CK_FZA_DMS_NULL_SHA 0x0300001C
164 #define SSL3_CK_FZA_DMS_FZA_SHA 0x0300001D
165 #if 0 /* Because it clashes with KRB5, is never used any more, and is safe
166 to remove according to David Hopwood <david.hopwood@zetnet.co.uk>
167 of the ietf-tls list */
168 #define SSL3_CK_FZA_DMS_RC4_SHA 0x0300001E
169 #endif
170#endif
171
172/* VRS Additional Kerberos5 entries
173 */
174#define SSL3_CK_KRB5_DES_64_CBC_SHA 0x0300001E
175#define SSL3_CK_KRB5_DES_192_CBC3_SHA 0x0300001F
176#define SSL3_CK_KRB5_RC4_128_SHA 0x03000020
177#define SSL3_CK_KRB5_IDEA_128_CBC_SHA 0x03000021
178#define SSL3_CK_KRB5_DES_64_CBC_MD5 0x03000022
179#define SSL3_CK_KRB5_DES_192_CBC3_MD5 0x03000023
180#define SSL3_CK_KRB5_RC4_128_MD5 0x03000024
181#define SSL3_CK_KRB5_IDEA_128_CBC_MD5 0x03000025
182
183#define SSL3_CK_KRB5_DES_40_CBC_SHA 0x03000026
184#define SSL3_CK_KRB5_RC2_40_CBC_SHA 0x03000027
185#define SSL3_CK_KRB5_RC4_40_SHA 0x03000028
186#define SSL3_CK_KRB5_DES_40_CBC_MD5 0x03000029
187#define SSL3_CK_KRB5_RC2_40_CBC_MD5 0x0300002A
188#define SSL3_CK_KRB5_RC4_40_MD5 0x0300002B
189
190#define SSL3_TXT_RSA_NULL_MD5 "NULL-MD5"
191#define SSL3_TXT_RSA_NULL_SHA "NULL-SHA"
192#define SSL3_TXT_RSA_RC4_40_MD5 "EXP-RC4-MD5"
193#define SSL3_TXT_RSA_RC4_128_MD5 "RC4-MD5"
194#define SSL3_TXT_RSA_RC4_128_SHA "RC4-SHA"
195#define SSL3_TXT_RSA_RC2_40_MD5 "EXP-RC2-CBC-MD5"
196#define SSL3_TXT_RSA_IDEA_128_SHA "IDEA-CBC-SHA"
197#define SSL3_TXT_RSA_DES_40_CBC_SHA "EXP-DES-CBC-SHA"
198#define SSL3_TXT_RSA_DES_64_CBC_SHA "DES-CBC-SHA"
199#define SSL3_TXT_RSA_DES_192_CBC3_SHA "DES-CBC3-SHA"
200
201#define SSL3_TXT_DH_DSS_DES_40_CBC_SHA "EXP-DH-DSS-DES-CBC-SHA"
202#define SSL3_TXT_DH_DSS_DES_64_CBC_SHA "DH-DSS-DES-CBC-SHA"
203#define SSL3_TXT_DH_DSS_DES_192_CBC3_SHA "DH-DSS-DES-CBC3-SHA"
204#define SSL3_TXT_DH_RSA_DES_40_CBC_SHA "EXP-DH-RSA-DES-CBC-SHA"
205#define SSL3_TXT_DH_RSA_DES_64_CBC_SHA "DH-RSA-DES-CBC-SHA"
206#define SSL3_TXT_DH_RSA_DES_192_CBC3_SHA "DH-RSA-DES-CBC3-SHA"
207
208#define SSL3_TXT_EDH_DSS_DES_40_CBC_SHA "EXP-EDH-DSS-DES-CBC-SHA"
209#define SSL3_TXT_EDH_DSS_DES_64_CBC_SHA "EDH-DSS-DES-CBC-SHA"
210#define SSL3_TXT_EDH_DSS_DES_192_CBC3_SHA "EDH-DSS-DES-CBC3-SHA"
211#define SSL3_TXT_EDH_RSA_DES_40_CBC_SHA "EXP-EDH-RSA-DES-CBC-SHA"
212#define SSL3_TXT_EDH_RSA_DES_64_CBC_SHA "EDH-RSA-DES-CBC-SHA"
213#define SSL3_TXT_EDH_RSA_DES_192_CBC3_SHA "EDH-RSA-DES-CBC3-SHA"
214
215#define SSL3_TXT_ADH_RC4_40_MD5 "EXP-ADH-RC4-MD5"
216#define SSL3_TXT_ADH_RC4_128_MD5 "ADH-RC4-MD5"
217#define SSL3_TXT_ADH_DES_40_CBC_SHA "EXP-ADH-DES-CBC-SHA"
218#define SSL3_TXT_ADH_DES_64_CBC_SHA "ADH-DES-CBC-SHA"
219#define SSL3_TXT_ADH_DES_192_CBC_SHA "ADH-DES-CBC3-SHA"
220
221#if 0
222 #define SSL3_TXT_FZA_DMS_NULL_SHA "FZA-NULL-SHA"
223 #define SSL3_TXT_FZA_DMS_FZA_SHA "FZA-FZA-CBC-SHA"
224 #define SSL3_TXT_FZA_DMS_RC4_SHA "FZA-RC4-SHA"
225#endif
226
227#define SSL3_TXT_KRB5_DES_64_CBC_SHA "KRB5-DES-CBC-SHA"
228#define SSL3_TXT_KRB5_DES_192_CBC3_SHA "KRB5-DES-CBC3-SHA"
229#define SSL3_TXT_KRB5_RC4_128_SHA "KRB5-RC4-SHA"
230#define SSL3_TXT_KRB5_IDEA_128_CBC_SHA "KRB5-IDEA-CBC-SHA"
231#define SSL3_TXT_KRB5_DES_64_CBC_MD5 "KRB5-DES-CBC-MD5"
232#define SSL3_TXT_KRB5_DES_192_CBC3_MD5 "KRB5-DES-CBC3-MD5"
233#define SSL3_TXT_KRB5_RC4_128_MD5 "KRB5-RC4-MD5"
234#define SSL3_TXT_KRB5_IDEA_128_CBC_MD5 "KRB5-IDEA-CBC-MD5"
235
236#define SSL3_TXT_KRB5_DES_40_CBC_SHA "EXP-KRB5-DES-CBC-SHA"
237#define SSL3_TXT_KRB5_RC2_40_CBC_SHA "EXP-KRB5-RC2-CBC-SHA"
238#define SSL3_TXT_KRB5_RC4_40_SHA "EXP-KRB5-RC4-SHA"
239#define SSL3_TXT_KRB5_DES_40_CBC_MD5 "EXP-KRB5-DES-CBC-MD5"
240#define SSL3_TXT_KRB5_RC2_40_CBC_MD5 "EXP-KRB5-RC2-CBC-MD5"
241#define SSL3_TXT_KRB5_RC4_40_MD5 "EXP-KRB5-RC4-MD5"
242
243#define SSL3_SSL_SESSION_ID_LENGTH 32
244#define SSL3_MAX_SSL_SESSION_ID_LENGTH 32
245
246#define SSL3_MASTER_SECRET_SIZE 48
247#define SSL3_RANDOM_SIZE 32
248#define SSL3_SESSION_ID_SIZE 32
249#define SSL3_RT_HEADER_LENGTH 5
250
251#define SSL3_HM_HEADER_LENGTH 4
252
253#ifndef SSL3_ALIGN_PAYLOAD
254 /* Some will argue that this increases memory footprint, but it's
255 * not actually true. Point is that malloc has to return at least
256 * 64-bit aligned pointers, meaning that allocating 5 bytes wastes
257 * 3 bytes in either case. Suggested pre-gaping simply moves these
258 * wasted bytes from the end of allocated region to its front,
259 * but makes data payload aligned, which improves performance:-) */
260# define SSL3_ALIGN_PAYLOAD 8
261#else
262# if (SSL3_ALIGN_PAYLOAD&(SSL3_ALIGN_PAYLOAD-1))!=0
263# error "insane SSL3_ALIGN_PAYLOAD"
264# undef SSL3_ALIGN_PAYLOAD
265# endif
266#endif
267
268/* This is the maximum MAC (digest) size used by the SSL library.
269 * Currently maximum of 20 is used by SHA1, but we reserve for
270 * future extension for 512-bit hashes.
271 */
272
273#define SSL3_RT_MAX_MD_SIZE 64
274
275/* Maximum block size used in all ciphersuites. Currently 16 for AES.
276 */
277
278#define SSL_RT_MAX_CIPHER_BLOCK_SIZE 16
279
280#define SSL3_RT_MAX_EXTRA (16384)
281
282/* Maximum plaintext length: defined by SSL/TLS standards */
283#define SSL3_RT_MAX_PLAIN_LENGTH 16384
284/* Maximum compression overhead: defined by SSL/TLS standards */
285#define SSL3_RT_MAX_COMPRESSED_OVERHEAD 1024
286
287/* The standards give a maximum encryption overhead of 1024 bytes.
288 * In practice the value is lower than this. The overhead is the maximum
289 * number of padding bytes (256) plus the mac size.
290 */
291#define SSL3_RT_MAX_ENCRYPTED_OVERHEAD (256 + SSL3_RT_MAX_MD_SIZE)
292
293/* OpenSSL currently only uses a padding length of at most one block so
294 * the send overhead is smaller.
295 */
296
297#define SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD \
298 (SSL_RT_MAX_CIPHER_BLOCK_SIZE + SSL3_RT_MAX_MD_SIZE)
299
300/* If compression isn't used don't include the compression overhead */
301
302#define SSL3_RT_MAX_COMPRESSED_LENGTH \
303 (SSL3_RT_MAX_PLAIN_LENGTH+SSL3_RT_MAX_COMPRESSED_OVERHEAD)
304#define SSL3_RT_MAX_ENCRYPTED_LENGTH \
305 (SSL3_RT_MAX_ENCRYPTED_OVERHEAD+SSL3_RT_MAX_COMPRESSED_LENGTH)
306#define SSL3_RT_MAX_PACKET_SIZE \
307 (SSL3_RT_MAX_ENCRYPTED_LENGTH+SSL3_RT_HEADER_LENGTH)
308
309#define SSL3_MD_CLIENT_FINISHED_CONST "\x43\x4C\x4E\x54"
310#define SSL3_MD_SERVER_FINISHED_CONST "\x53\x52\x56\x52"
311
312#define SSL3_VERSION 0x0300
313#define SSL3_VERSION_MAJOR 0x03
314#define SSL3_VERSION_MINOR 0x00
315
316#define SSL3_RT_CHANGE_CIPHER_SPEC 20
317#define SSL3_RT_ALERT 21
318#define SSL3_RT_HANDSHAKE 22
319#define SSL3_RT_APPLICATION_DATA 23
320#define TLS1_RT_HEARTBEAT 24
321
322/* Pseudo content types to indicate additional parameters */
323#define TLS1_RT_CRYPTO 0x1000
324#define TLS1_RT_CRYPTO_PREMASTER (TLS1_RT_CRYPTO | 0x1)
325#define TLS1_RT_CRYPTO_CLIENT_RANDOM (TLS1_RT_CRYPTO | 0x2)
326#define TLS1_RT_CRYPTO_SERVER_RANDOM (TLS1_RT_CRYPTO | 0x3)
327#define TLS1_RT_CRYPTO_MASTER (TLS1_RT_CRYPTO | 0x4)
328
329#define TLS1_RT_CRYPTO_READ 0x0000
330#define TLS1_RT_CRYPTO_WRITE 0x0100
331#define TLS1_RT_CRYPTO_MAC (TLS1_RT_CRYPTO | 0x5)
332#define TLS1_RT_CRYPTO_KEY (TLS1_RT_CRYPTO | 0x6)
333#define TLS1_RT_CRYPTO_IV (TLS1_RT_CRYPTO | 0x7)
334#define TLS1_RT_CRYPTO_FIXED_IV (TLS1_RT_CRYPTO | 0x8)
335
336/* Pseudo content type for SSL/TLS header info */
337#define SSL3_RT_HEADER 0x100
338
339#define SSL3_AL_WARNING 1
340#define SSL3_AL_FATAL 2
341
342#define SSL3_AD_CLOSE_NOTIFY 0
343#define SSL3_AD_UNEXPECTED_MESSAGE 10 /* fatal */
344#define SSL3_AD_BAD_RECORD_MAC 20 /* fatal */
345#define SSL3_AD_DECOMPRESSION_FAILURE 30 /* fatal */
346#define SSL3_AD_HANDSHAKE_FAILURE 40 /* fatal */
347#define SSL3_AD_NO_CERTIFICATE 41
348#define SSL3_AD_BAD_CERTIFICATE 42
349#define SSL3_AD_UNSUPPORTED_CERTIFICATE 43
350#define SSL3_AD_CERTIFICATE_REVOKED 44
351#define SSL3_AD_CERTIFICATE_EXPIRED 45
352#define SSL3_AD_CERTIFICATE_UNKNOWN 46
353#define SSL3_AD_ILLEGAL_PARAMETER 47 /* fatal */
354
355#define TLS1_HB_REQUEST 1
356#define TLS1_HB_RESPONSE 2
357
358#ifndef OPENSSL_NO_SSL_INTERN
359
360typedef struct ssl3_record_st
361 {
362/*r */ int type; /* type of record */
363/*rw*/ unsigned int length; /* How many bytes available */
364/*r */ unsigned int off; /* read/write offset into 'buf' */
365/*rw*/ unsigned char *data; /* pointer to the record data */
366/*rw*/ unsigned char *input; /* where the decode bytes are */
367/*r */ unsigned char *comp; /* only used with decompression - malloc()ed */
368/*r */ unsigned long epoch; /* epoch number, needed by DTLS1 */
369/*r */ unsigned char seq_num[8]; /* sequence number, needed by DTLS1 */
370 } SSL3_RECORD;
371
372typedef struct ssl3_buffer_st
373 {
374 unsigned char *buf; /* at least SSL3_RT_MAX_PACKET_SIZE bytes,
375 * see ssl3_setup_buffers() */
376 size_t len; /* buffer size */
377 int offset; /* where to 'copy from' */
378 int left; /* how many bytes left */
379 } SSL3_BUFFER;
380
381#endif
382
383#define SSL3_CT_RSA_SIGN 1
384#define SSL3_CT_DSS_SIGN 2
385#define SSL3_CT_RSA_FIXED_DH 3
386#define SSL3_CT_DSS_FIXED_DH 4
387#define SSL3_CT_RSA_EPHEMERAL_DH 5
388#define SSL3_CT_DSS_EPHEMERAL_DH 6
389#define SSL3_CT_FORTEZZA_DMS 20
390/* SSL3_CT_NUMBER is used to size arrays and it must be large
391 * enough to contain all of the cert types defined either for
392 * SSLv3 and TLSv1.
393 */
394#define SSL3_CT_NUMBER 9
395
396
397#define SSL3_FLAGS_NO_RENEGOTIATE_CIPHERS 0x0001
398#define SSL3_FLAGS_DELAY_CLIENT_FINISHED 0x0002
399#define SSL3_FLAGS_POP_BUFFER 0x0004
400#define TLS1_FLAGS_TLS_PADDING_BUG 0x0008
401#define TLS1_FLAGS_SKIP_CERT_VERIFY 0x0010
402#define TLS1_FLAGS_KEEP_HANDSHAKE 0x0020
403
404/* SSL3_FLAGS_SGC_RESTART_DONE is set when we
405 * restart a handshake because of MS SGC and so prevents us
406 * from restarting the handshake in a loop. It's reset on a
407 * renegotiation, so effectively limits the client to one restart
408 * per negotiation. This limits the possibility of a DDoS
409 * attack where the client handshakes in a loop using SGC to
410 * restart. Servers which permit renegotiation can still be
411 * effected, but we can't prevent that.
412 */
413#define SSL3_FLAGS_SGC_RESTART_DONE 0x0040
414
415#ifndef OPENSSL_NO_SSL_INTERN
416
417typedef struct ssl3_state_st
418 {
419 long flags;
420 int delay_buf_pop_ret;
421
422 unsigned char read_sequence[8];
423 int read_mac_secret_size;
424 unsigned char read_mac_secret[EVP_MAX_MD_SIZE];
425 unsigned char write_sequence[8];
426 int write_mac_secret_size;
427 unsigned char write_mac_secret[EVP_MAX_MD_SIZE];
428
429 unsigned char server_random[SSL3_RANDOM_SIZE];
430 unsigned char client_random[SSL3_RANDOM_SIZE];
431
432 /* flags for countermeasure against known-IV weakness */
433 int need_empty_fragments;
434 int empty_fragment_done;
435
436 /* The value of 'extra' when the buffers were initialized */
437 int init_extra;
438
439 SSL3_BUFFER rbuf; /* read IO goes into here */
440 SSL3_BUFFER wbuf; /* write IO goes into here */
441
442 SSL3_RECORD rrec; /* each decoded record goes in here */
443 SSL3_RECORD wrec; /* goes out from here */
444
445 /* storage for Alert/Handshake protocol data received but not
446 * yet processed by ssl3_read_bytes: */
447 unsigned char alert_fragment[2];
448 unsigned int alert_fragment_len;
449 unsigned char handshake_fragment[4];
450 unsigned int handshake_fragment_len;
451
452 /* partial write - check the numbers match */
453 unsigned int wnum; /* number of bytes sent so far */
454 int wpend_tot; /* number bytes written */
455 int wpend_type;
456 int wpend_ret; /* number of bytes submitted */
457 const unsigned char *wpend_buf;
458
459 /* used during startup, digest all incoming/outgoing packets */
460 BIO *handshake_buffer;
461 /* When set of handshake digests is determined, buffer is hashed
462 * and freed and MD_CTX-es for all required digests are stored in
463 * this array */
464 EVP_MD_CTX **handshake_dgst;
465 /* this is set whenerver we see a change_cipher_spec message
466 * come in when we are not looking for one */
467 int change_cipher_spec;
468
469 int warn_alert;
470 int fatal_alert;
471 /* we allow one fatal and one warning alert to be outstanding,
472 * send close alert via the warning alert */
473 int alert_dispatch;
474 unsigned char send_alert[2];
475
476 /* This flag is set when we should renegotiate ASAP, basically when
477 * there is no more data in the read or write buffers */
478 int renegotiate;
479 int total_renegotiations;
480 int num_renegotiations;
481
482 int in_read_app_data;
483
484 /* Opaque PRF input as used for the current handshake.
485 * These fields are used only if TLSEXT_TYPE_opaque_prf_input is defined
486 * (otherwise, they are merely present to improve binary compatibility) */
487 void *client_opaque_prf_input;
488 size_t client_opaque_prf_input_len;
489 void *server_opaque_prf_input;
490 size_t server_opaque_prf_input_len;
491
492 struct {
493 /* actually only needs to be 16+20 */
494 unsigned char cert_verify_md[EVP_MAX_MD_SIZE*2];
495
496 /* actually only need to be 16+20 for SSLv3 and 12 for TLS */
497 unsigned char finish_md[EVP_MAX_MD_SIZE*2];
498 int finish_md_len;
499 unsigned char peer_finish_md[EVP_MAX_MD_SIZE*2];
500 int peer_finish_md_len;
501
502 unsigned long message_size;
503 int message_type;
504
505 /* used to hold the new cipher we are going to use */
506 const SSL_CIPHER *new_cipher;
507#ifndef OPENSSL_NO_DH
508 DH *dh;
509#endif
510
511#ifndef OPENSSL_NO_ECDH
512 EC_KEY *ecdh; /* holds short lived ECDH key */
513#endif
514
515 /* used when SSL_ST_FLUSH_DATA is entered */
516 int next_state;
517
518 int reuse_message;
519
520 /* used for certificate requests */
521 int cert_req;
522 int ctype_num;
523 char ctype[SSL3_CT_NUMBER];
524 STACK_OF(X509_NAME) *ca_names;
525
526 int use_rsa_tmp;
527
528 int key_block_length;
529 unsigned char *key_block;
530
531 const EVP_CIPHER *new_sym_enc;
Adam Langleyc9fb3752014-06-20 12:00:00 -0700532 const EVP_AEAD *new_aead;
Adam Langley95c29f32014-06-20 12:00:00 -0700533 const EVP_MD *new_hash;
534 int new_mac_pkey_type;
535 int new_mac_secret_size;
536 char *new_compression;
537 int cert_request;
538 } tmp;
539
540 /* Connection binding to prevent renegotiation attacks */
541 unsigned char previous_client_finished[EVP_MAX_MD_SIZE];
542 unsigned char previous_client_finished_len;
543 unsigned char previous_server_finished[EVP_MAX_MD_SIZE];
544 unsigned char previous_server_finished_len;
545 int send_connection_binding; /* TODOEKR */
546
547#ifndef OPENSSL_NO_NEXTPROTONEG
548 /* Set if we saw the Next Protocol Negotiation extension from our peer. */
549 int next_proto_neg_seen;
550#endif
551
552#ifndef OPENSSL_NO_TLSEXT
553 /* tlsext_authz_client_types contains an array of supported authz
554 * types, as advertised by the client. The array is sorted and
555 * does not contain any duplicates. */
556 unsigned char *tlsext_authz_client_types;
557 size_t tlsext_authz_client_types_len;
558 /* tlsext_authz_promised_to_client is true iff we're a server and we
559 * echoed the client's supplemental data extension and therefore must
560 * send a supplemental data handshake message. */
561 char tlsext_authz_promised_to_client;
562 /* tlsext_authz_server_promised is true iff we're a client and the
563 * server echoed our server_authz extension and therefore must send us
564 * a supplemental data handshake message. */
565 char tlsext_authz_server_promised;
566
567 /* tlsext_custom_types contains an array of TLS Extension types which
568 * were advertised by the client in its ClientHello, which were not
569 * otherwise handled by OpenSSL, and which the server has registered
570 * a custom_srv_ext_record to handle.
571 * The array does not contain any duplicates, and is in the same order
572 * as the types were received in the client hello. */
573 unsigned short *tlsext_custom_types;
574 size_t tlsext_custom_types_count; /* how many tlsext_custom_types */
575
576#ifndef OPENSSL_NO_EC
577 /* This is set to true if we believe that this is a version of Safari
578 * running on OS X 10.6 or newer. We wish to know this because Safari
579 * on 10.8 .. 10.8.3 has broken ECDHE-ECDSA support. */
580 char is_probably_safari;
581#endif /* !OPENSSL_NO_EC */
582
583 /* ALPN information
584 * (we are in the process of transitioning from NPN to ALPN.) */
585
586 /* In a server these point to the selected ALPN protocol after the
587 * ClientHello has been processed. In a client these contain the
588 * protocol that the server selected once the ServerHello has been
589 * processed. */
590 unsigned char *alpn_selected;
591 unsigned alpn_selected_len;
592#endif /* OPENSSL_NO_TLSEXT */
Adam Langley1258b6a2014-06-20 12:00:00 -0700593
594 /* In a client, this means that the server supported Channel ID and that
595 * a Channel ID was sent. In a server it means that we echoed support
596 * for Channel IDs and that tlsext_channel_id will be valid after the
597 * handshake. */
598 char tlsext_channel_id_valid;
599 /* tlsext_channel_id_new means that the updated Channel ID extension
600 * was negotiated. This is a temporary hack in the code to support both
601 * forms of Channel ID extension while we transition to the new format,
602 * which fixed a security issue. */
603 char tlsext_channel_id_new;
604 /* For a server:
605 * If |tlsext_channel_id_valid| is true, then this contains the
606 * verified Channel ID from the client: a P256 point, (x,y), where
607 * each are big-endian values. */
608 unsigned char tlsext_channel_id[64];
Adam Langley95c29f32014-06-20 12:00:00 -0700609 } SSL3_STATE;
610
611#endif
612
613/* SSLv3 */
614/*client */
615/* extra state */
616#define SSL3_ST_CW_FLUSH (0x100|SSL_ST_CONNECT)
Adam Langleyadb739e2014-06-20 12:00:00 -0700617#define SSL3_ST_CUTTHROUGH_COMPLETE (0x101|SSL_ST_CONNECT)
Adam Langley95c29f32014-06-20 12:00:00 -0700618/* write to server */
619#define SSL3_ST_CW_CLNT_HELLO_A (0x110|SSL_ST_CONNECT)
620#define SSL3_ST_CW_CLNT_HELLO_B (0x111|SSL_ST_CONNECT)
621/* read from server */
622#define SSL3_ST_CR_SRVR_HELLO_A (0x120|SSL_ST_CONNECT)
623#define SSL3_ST_CR_SRVR_HELLO_B (0x121|SSL_ST_CONNECT)
624#define DTLS1_ST_CR_HELLO_VERIFY_REQUEST_A (0x126|SSL_ST_CONNECT)
625#define DTLS1_ST_CR_HELLO_VERIFY_REQUEST_B (0x127|SSL_ST_CONNECT)
626#define SSL3_ST_CR_CERT_A (0x130|SSL_ST_CONNECT)
627#define SSL3_ST_CR_CERT_B (0x131|SSL_ST_CONNECT)
628#define SSL3_ST_CR_KEY_EXCH_A (0x140|SSL_ST_CONNECT)
629#define SSL3_ST_CR_KEY_EXCH_B (0x141|SSL_ST_CONNECT)
630#define SSL3_ST_CR_CERT_REQ_A (0x150|SSL_ST_CONNECT)
631#define SSL3_ST_CR_CERT_REQ_B (0x151|SSL_ST_CONNECT)
632#define SSL3_ST_CR_SRVR_DONE_A (0x160|SSL_ST_CONNECT)
633#define SSL3_ST_CR_SRVR_DONE_B (0x161|SSL_ST_CONNECT)
634#define SSL3_ST_CR_SUPPLEMENTAL_DATA_A (0x210|SSL_ST_CONNECT)
635#define SSL3_ST_CR_SUPPLEMENTAL_DATA_B (0x211|SSL_ST_CONNECT)
636/* write to server */
637#define SSL3_ST_CW_CERT_A (0x170|SSL_ST_CONNECT)
638#define SSL3_ST_CW_CERT_B (0x171|SSL_ST_CONNECT)
639#define SSL3_ST_CW_CERT_C (0x172|SSL_ST_CONNECT)
640#define SSL3_ST_CW_CERT_D (0x173|SSL_ST_CONNECT)
641#define SSL3_ST_CW_KEY_EXCH_A (0x180|SSL_ST_CONNECT)
642#define SSL3_ST_CW_KEY_EXCH_B (0x181|SSL_ST_CONNECT)
643#define SSL3_ST_CW_CERT_VRFY_A (0x190|SSL_ST_CONNECT)
644#define SSL3_ST_CW_CERT_VRFY_B (0x191|SSL_ST_CONNECT)
645#define SSL3_ST_CW_CHANGE_A (0x1A0|SSL_ST_CONNECT)
646#define SSL3_ST_CW_CHANGE_B (0x1A1|SSL_ST_CONNECT)
647#ifndef OPENSSL_NO_NEXTPROTONEG
648#define SSL3_ST_CW_NEXT_PROTO_A (0x200|SSL_ST_CONNECT)
649#define SSL3_ST_CW_NEXT_PROTO_B (0x201|SSL_ST_CONNECT)
650#endif
Adam Langley1258b6a2014-06-20 12:00:00 -0700651#define SSL3_ST_CW_CHANNEL_ID_A (0x220|SSL_ST_CONNECT)
652#define SSL3_ST_CW_CHANNEL_ID_B (0x221|SSL_ST_CONNECT)
Adam Langley95c29f32014-06-20 12:00:00 -0700653#define SSL3_ST_CW_FINISHED_A (0x1B0|SSL_ST_CONNECT)
654#define SSL3_ST_CW_FINISHED_B (0x1B1|SSL_ST_CONNECT)
655/* read from server */
656#define SSL3_ST_CR_CHANGE_A (0x1C0|SSL_ST_CONNECT)
657#define SSL3_ST_CR_CHANGE_B (0x1C1|SSL_ST_CONNECT)
658#define SSL3_ST_CR_FINISHED_A (0x1D0|SSL_ST_CONNECT)
659#define SSL3_ST_CR_FINISHED_B (0x1D1|SSL_ST_CONNECT)
660#define SSL3_ST_CR_SESSION_TICKET_A (0x1E0|SSL_ST_CONNECT)
661#define SSL3_ST_CR_SESSION_TICKET_B (0x1E1|SSL_ST_CONNECT)
662#define SSL3_ST_CR_CERT_STATUS_A (0x1F0|SSL_ST_CONNECT)
663#define SSL3_ST_CR_CERT_STATUS_B (0x1F1|SSL_ST_CONNECT)
664
665/* server */
666/* extra state */
667#define SSL3_ST_SW_FLUSH (0x100|SSL_ST_ACCEPT)
668/* read from client */
669/* Do not change the number values, they do matter */
670#define SSL3_ST_SR_CLNT_HELLO_A (0x110|SSL_ST_ACCEPT)
671#define SSL3_ST_SR_CLNT_HELLO_B (0x111|SSL_ST_ACCEPT)
672#define SSL3_ST_SR_CLNT_HELLO_C (0x112|SSL_ST_ACCEPT)
673#define SSL3_ST_SR_CLNT_HELLO_D (0x115|SSL_ST_ACCEPT)
674/* write to client */
675#define DTLS1_ST_SW_HELLO_VERIFY_REQUEST_A (0x113|SSL_ST_ACCEPT)
676#define DTLS1_ST_SW_HELLO_VERIFY_REQUEST_B (0x114|SSL_ST_ACCEPT)
677#define SSL3_ST_SW_HELLO_REQ_A (0x120|SSL_ST_ACCEPT)
678#define SSL3_ST_SW_HELLO_REQ_B (0x121|SSL_ST_ACCEPT)
679#define SSL3_ST_SW_HELLO_REQ_C (0x122|SSL_ST_ACCEPT)
680#define SSL3_ST_SW_SRVR_HELLO_A (0x130|SSL_ST_ACCEPT)
681#define SSL3_ST_SW_SRVR_HELLO_B (0x131|SSL_ST_ACCEPT)
682#define SSL3_ST_SW_CERT_A (0x140|SSL_ST_ACCEPT)
683#define SSL3_ST_SW_CERT_B (0x141|SSL_ST_ACCEPT)
684#define SSL3_ST_SW_KEY_EXCH_A (0x150|SSL_ST_ACCEPT)
685#define SSL3_ST_SW_KEY_EXCH_B (0x151|SSL_ST_ACCEPT)
686#define SSL3_ST_SW_CERT_REQ_A (0x160|SSL_ST_ACCEPT)
687#define SSL3_ST_SW_CERT_REQ_B (0x161|SSL_ST_ACCEPT)
688#define SSL3_ST_SW_SRVR_DONE_A (0x170|SSL_ST_ACCEPT)
689#define SSL3_ST_SW_SRVR_DONE_B (0x171|SSL_ST_ACCEPT)
690/* read from client */
691#define SSL3_ST_SR_CERT_A (0x180|SSL_ST_ACCEPT)
692#define SSL3_ST_SR_CERT_B (0x181|SSL_ST_ACCEPT)
693#define SSL3_ST_SR_KEY_EXCH_A (0x190|SSL_ST_ACCEPT)
694#define SSL3_ST_SR_KEY_EXCH_B (0x191|SSL_ST_ACCEPT)
695#define SSL3_ST_SR_CERT_VRFY_A (0x1A0|SSL_ST_ACCEPT)
696#define SSL3_ST_SR_CERT_VRFY_B (0x1A1|SSL_ST_ACCEPT)
697#define SSL3_ST_SR_CHANGE_A (0x1B0|SSL_ST_ACCEPT)
698#define SSL3_ST_SR_CHANGE_B (0x1B1|SSL_ST_ACCEPT)
699#ifndef OPENSSL_NO_NEXTPROTONEG
700#define SSL3_ST_SR_NEXT_PROTO_A (0x210|SSL_ST_ACCEPT)
701#define SSL3_ST_SR_NEXT_PROTO_B (0x211|SSL_ST_ACCEPT)
702#endif
Adam Langley1258b6a2014-06-20 12:00:00 -0700703#define SSL3_ST_SR_POST_CLIENT_CERT (0x1BF|SSL_ST_ACCEPT)
704#define SSL3_ST_SR_CHANNEL_ID_A (0x230|SSL_ST_ACCEPT)
705#define SSL3_ST_SR_CHANNEL_ID_B (0x231|SSL_ST_ACCEPT)
Adam Langley95c29f32014-06-20 12:00:00 -0700706#define SSL3_ST_SR_FINISHED_A (0x1C0|SSL_ST_ACCEPT)
707#define SSL3_ST_SR_FINISHED_B (0x1C1|SSL_ST_ACCEPT)
708/* write to client */
709#define SSL3_ST_SW_CHANGE_A (0x1D0|SSL_ST_ACCEPT)
710#define SSL3_ST_SW_CHANGE_B (0x1D1|SSL_ST_ACCEPT)
711#define SSL3_ST_SW_FINISHED_A (0x1E0|SSL_ST_ACCEPT)
712#define SSL3_ST_SW_FINISHED_B (0x1E1|SSL_ST_ACCEPT)
713#define SSL3_ST_SW_SESSION_TICKET_A (0x1F0|SSL_ST_ACCEPT)
714#define SSL3_ST_SW_SESSION_TICKET_B (0x1F1|SSL_ST_ACCEPT)
715#define SSL3_ST_SW_CERT_STATUS_A (0x200|SSL_ST_ACCEPT)
716#define SSL3_ST_SW_CERT_STATUS_B (0x201|SSL_ST_ACCEPT)
717#define SSL3_ST_SW_SUPPLEMENTAL_DATA_A (0x220|SSL_ST_ACCEPT)
718#define SSL3_ST_SW_SUPPLEMENTAL_DATA_B (0x221|SSL_ST_ACCEPT)
719
720#define SSL3_MT_HELLO_REQUEST 0
721#define SSL3_MT_CLIENT_HELLO 1
722#define SSL3_MT_SERVER_HELLO 2
723#define SSL3_MT_NEWSESSION_TICKET 4
724#define SSL3_MT_CERTIFICATE 11
725#define SSL3_MT_SERVER_KEY_EXCHANGE 12
726#define SSL3_MT_CERTIFICATE_REQUEST 13
727#define SSL3_MT_SERVER_DONE 14
728#define SSL3_MT_CERTIFICATE_VERIFY 15
729#define SSL3_MT_CLIENT_KEY_EXCHANGE 16
730#define SSL3_MT_FINISHED 20
731#define SSL3_MT_CERTIFICATE_STATUS 22
732#define SSL3_MT_SUPPLEMENTAL_DATA 23
733#ifndef OPENSSL_NO_NEXTPROTONEG
734#define SSL3_MT_NEXT_PROTO 67
735#endif
Adam Langley1258b6a2014-06-20 12:00:00 -0700736#define SSL3_MT_ENCRYPTED_EXTENSIONS 203
Adam Langley95c29f32014-06-20 12:00:00 -0700737#define DTLS1_MT_HELLO_VERIFY_REQUEST 3
738
739
740#define SSL3_MT_CCS 1
741
742/* These are used when changing over to a new cipher */
743#define SSL3_CC_READ 0x01
744#define SSL3_CC_WRITE 0x02
745#define SSL3_CC_CLIENT 0x10
746#define SSL3_CC_SERVER 0x20
747#define SSL3_CHANGE_CIPHER_CLIENT_WRITE (SSL3_CC_CLIENT|SSL3_CC_WRITE)
748#define SSL3_CHANGE_CIPHER_SERVER_READ (SSL3_CC_SERVER|SSL3_CC_READ)
749#define SSL3_CHANGE_CIPHER_CLIENT_READ (SSL3_CC_CLIENT|SSL3_CC_READ)
750#define SSL3_CHANGE_CIPHER_SERVER_WRITE (SSL3_CC_SERVER|SSL3_CC_WRITE)
751
752#ifdef __cplusplus
753}
754#endif
755#endif