indent has problems with comments that are on the right hand side of a line.
[openssl.git] / ssl / ssl3.h
1 /* 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 #ifndef OPENSSL_NO_COMP
121 #include <openssl/comp.h>
122 #endif
123 #include <openssl/buffer.h>
124 #include <openssl/evp.h>
125 #include <openssl/ssl.h>
126 #include <openssl/pq_compat.h>
127
128 #ifdef  __cplusplus
129 extern "C" {
130 #endif
131
132 /* Signalling cipher suite value from RFC 5746
133  * (TLS_EMPTY_RENEGOTIATION_INFO_SCSV) */
134 #define SSL3_CK_SCSV                            0x030000FF
135
136 /* Signalling cipher suite value from draft-ietf-tls-downgrade-scsv-00
137  * (TLS_FALLBACK_SCSV) */
138 #define SSL3_CK_FALLBACK_SCSV                   0x03005600
139
140 #define SSL3_CK_RSA_NULL_MD5                    0x03000001
141 #define SSL3_CK_RSA_NULL_SHA                    0x03000002
142 #define SSL3_CK_RSA_RC4_40_MD5                  0x03000003
143 #define SSL3_CK_RSA_RC4_128_MD5                 0x03000004
144 #define SSL3_CK_RSA_RC4_128_SHA                 0x03000005
145 #define SSL3_CK_RSA_RC2_40_MD5                  0x03000006
146 #define SSL3_CK_RSA_IDEA_128_SHA                0x03000007
147 #define SSL3_CK_RSA_DES_40_CBC_SHA              0x03000008
148 #define SSL3_CK_RSA_DES_64_CBC_SHA              0x03000009
149 #define SSL3_CK_RSA_DES_192_CBC3_SHA            0x0300000A
150
151 #define SSL3_CK_DH_DSS_DES_40_CBC_SHA           0x0300000B
152 #define SSL3_CK_DH_DSS_DES_64_CBC_SHA           0x0300000C
153 #define SSL3_CK_DH_DSS_DES_192_CBC3_SHA         0x0300000D
154 #define SSL3_CK_DH_RSA_DES_40_CBC_SHA           0x0300000E
155 #define SSL3_CK_DH_RSA_DES_64_CBC_SHA           0x0300000F
156 #define SSL3_CK_DH_RSA_DES_192_CBC3_SHA         0x03000010
157
158 #define SSL3_CK_EDH_DSS_DES_40_CBC_SHA          0x03000011
159 #define SSL3_CK_EDH_DSS_DES_64_CBC_SHA          0x03000012
160 #define SSL3_CK_EDH_DSS_DES_192_CBC3_SHA        0x03000013
161 #define SSL3_CK_EDH_RSA_DES_40_CBC_SHA          0x03000014
162 #define SSL3_CK_EDH_RSA_DES_64_CBC_SHA          0x03000015
163 #define SSL3_CK_EDH_RSA_DES_192_CBC3_SHA        0x03000016
164
165 #define SSL3_CK_ADH_RC4_40_MD5                  0x03000017
166 #define SSL3_CK_ADH_RC4_128_MD5                 0x03000018
167 #define SSL3_CK_ADH_DES_40_CBC_SHA              0x03000019
168 #define SSL3_CK_ADH_DES_64_CBC_SHA              0x0300001A
169 #define SSL3_CK_ADH_DES_192_CBC_SHA             0x0300001B
170
171 #define SSL3_CK_FZA_DMS_NULL_SHA                0x0300001C
172 #define SSL3_CK_FZA_DMS_FZA_SHA                 0x0300001D
173 #if 0 /* Because it clashes with KRB5, is never used any more, and is safe
174          to remove according to David Hopwood <david.hopwood@zetnet.co.uk>
175          of the ietf-tls list */
176 #define SSL3_CK_FZA_DMS_RC4_SHA                 0x0300001E
177 #endif
178
179 /*    VRS Additional Kerberos5 entries
180  */
181 #define SSL3_CK_KRB5_DES_64_CBC_SHA             0x0300001E
182 #define SSL3_CK_KRB5_DES_192_CBC3_SHA           0x0300001F
183 #define SSL3_CK_KRB5_RC4_128_SHA                0x03000020
184 #define SSL3_CK_KRB5_IDEA_128_CBC_SHA           0x03000021
185 #define SSL3_CK_KRB5_DES_64_CBC_MD5             0x03000022
186 #define SSL3_CK_KRB5_DES_192_CBC3_MD5           0x03000023
187 #define SSL3_CK_KRB5_RC4_128_MD5                0x03000024
188 #define SSL3_CK_KRB5_IDEA_128_CBC_MD5           0x03000025
189
190 #define SSL3_CK_KRB5_DES_40_CBC_SHA             0x03000026
191 #define SSL3_CK_KRB5_RC2_40_CBC_SHA             0x03000027
192 #define SSL3_CK_KRB5_RC4_40_SHA                 0x03000028
193 #define SSL3_CK_KRB5_DES_40_CBC_MD5             0x03000029
194 #define SSL3_CK_KRB5_RC2_40_CBC_MD5             0x0300002A
195 #define SSL3_CK_KRB5_RC4_40_MD5                 0x0300002B
196
197 #define SSL3_TXT_RSA_NULL_MD5                   "NULL-MD5"
198 #define SSL3_TXT_RSA_NULL_SHA                   "NULL-SHA"
199 #define SSL3_TXT_RSA_RC4_40_MD5                 "EXP-RC4-MD5"
200 #define SSL3_TXT_RSA_RC4_128_MD5                "RC4-MD5"
201 #define SSL3_TXT_RSA_RC4_128_SHA                "RC4-SHA"
202 #define SSL3_TXT_RSA_RC2_40_MD5                 "EXP-RC2-CBC-MD5"
203 #define SSL3_TXT_RSA_IDEA_128_SHA               "IDEA-CBC-SHA"
204 #define SSL3_TXT_RSA_DES_40_CBC_SHA             "EXP-DES-CBC-SHA"
205 #define SSL3_TXT_RSA_DES_64_CBC_SHA             "DES-CBC-SHA"
206 #define SSL3_TXT_RSA_DES_192_CBC3_SHA           "DES-CBC3-SHA"
207
208 #define SSL3_TXT_DH_DSS_DES_40_CBC_SHA          "EXP-DH-DSS-DES-CBC-SHA"
209 #define SSL3_TXT_DH_DSS_DES_64_CBC_SHA          "DH-DSS-DES-CBC-SHA"
210 #define SSL3_TXT_DH_DSS_DES_192_CBC3_SHA        "DH-DSS-DES-CBC3-SHA"
211 #define SSL3_TXT_DH_RSA_DES_40_CBC_SHA          "EXP-DH-RSA-DES-CBC-SHA"
212 #define SSL3_TXT_DH_RSA_DES_64_CBC_SHA          "DH-RSA-DES-CBC-SHA"
213 #define SSL3_TXT_DH_RSA_DES_192_CBC3_SHA        "DH-RSA-DES-CBC3-SHA"
214
215 #define SSL3_TXT_EDH_DSS_DES_40_CBC_SHA         "EXP-EDH-DSS-DES-CBC-SHA"
216 #define SSL3_TXT_EDH_DSS_DES_64_CBC_SHA         "EDH-DSS-DES-CBC-SHA"
217 #define SSL3_TXT_EDH_DSS_DES_192_CBC3_SHA       "EDH-DSS-DES-CBC3-SHA"
218 #define SSL3_TXT_EDH_RSA_DES_40_CBC_SHA         "EXP-EDH-RSA-DES-CBC-SHA"
219 #define SSL3_TXT_EDH_RSA_DES_64_CBC_SHA         "EDH-RSA-DES-CBC-SHA"
220 #define SSL3_TXT_EDH_RSA_DES_192_CBC3_SHA       "EDH-RSA-DES-CBC3-SHA"
221
222 #define SSL3_TXT_ADH_RC4_40_MD5                 "EXP-ADH-RC4-MD5"
223 #define SSL3_TXT_ADH_RC4_128_MD5                "ADH-RC4-MD5"
224 #define SSL3_TXT_ADH_DES_40_CBC_SHA             "EXP-ADH-DES-CBC-SHA"
225 #define SSL3_TXT_ADH_DES_64_CBC_SHA             "ADH-DES-CBC-SHA"
226 #define SSL3_TXT_ADH_DES_192_CBC_SHA            "ADH-DES-CBC3-SHA"
227
228 #define SSL3_TXT_FZA_DMS_NULL_SHA               "FZA-NULL-SHA"
229 #define SSL3_TXT_FZA_DMS_FZA_SHA                "FZA-FZA-CBC-SHA"
230 #define SSL3_TXT_FZA_DMS_RC4_SHA                "FZA-RC4-SHA"
231
232 #define SSL3_TXT_KRB5_DES_64_CBC_SHA            "KRB5-DES-CBC-SHA"
233 #define SSL3_TXT_KRB5_DES_192_CBC3_SHA          "KRB5-DES-CBC3-SHA"
234 #define SSL3_TXT_KRB5_RC4_128_SHA               "KRB5-RC4-SHA"
235 #define SSL3_TXT_KRB5_IDEA_128_CBC_SHA          "KRB5-IDEA-CBC-SHA"
236 #define SSL3_TXT_KRB5_DES_64_CBC_MD5            "KRB5-DES-CBC-MD5"
237 #define SSL3_TXT_KRB5_DES_192_CBC3_MD5          "KRB5-DES-CBC3-MD5"
238 #define SSL3_TXT_KRB5_RC4_128_MD5               "KRB5-RC4-MD5"
239 #define SSL3_TXT_KRB5_IDEA_128_CBC_MD5          "KRB5-IDEA-CBC-MD5"
240
241 #define SSL3_TXT_KRB5_DES_40_CBC_SHA            "EXP-KRB5-DES-CBC-SHA"
242 #define SSL3_TXT_KRB5_RC2_40_CBC_SHA            "EXP-KRB5-RC2-CBC-SHA"
243 #define SSL3_TXT_KRB5_RC4_40_SHA                "EXP-KRB5-RC4-SHA"
244 #define SSL3_TXT_KRB5_DES_40_CBC_MD5            "EXP-KRB5-DES-CBC-MD5"
245 #define SSL3_TXT_KRB5_RC2_40_CBC_MD5            "EXP-KRB5-RC2-CBC-MD5"
246 #define SSL3_TXT_KRB5_RC4_40_MD5                "EXP-KRB5-RC4-MD5"
247
248 #define SSL3_SSL_SESSION_ID_LENGTH              32
249 #define SSL3_MAX_SSL_SESSION_ID_LENGTH          32
250
251 #define SSL3_MASTER_SECRET_SIZE                 48
252 #define SSL3_RANDOM_SIZE                        32
253 #define SSL3_SESSION_ID_SIZE                    32
254 #define SSL3_RT_HEADER_LENGTH                   5
255
256 /* Due to MS stuffing up, this can change.... */
257 #if defined(OPENSSL_SYS_WIN16) || \
258         (defined(OPENSSL_SYS_MSDOS) && !defined(OPENSSL_SYS_WIN32))
259 #define SSL3_RT_MAX_EXTRA                       (14000)
260 #else
261 #define SSL3_RT_MAX_EXTRA                       (16384)
262 #endif
263
264 #define SSL3_RT_MAX_PLAIN_LENGTH                16384
265 #ifdef OPENSSL_NO_COMP
266 #define SSL3_RT_MAX_COMPRESSED_LENGTH   SSL3_RT_MAX_PLAIN_LENGTH
267 #else
268 #define SSL3_RT_MAX_COMPRESSED_LENGTH   (1024+SSL3_RT_MAX_PLAIN_LENGTH)
269 #endif
270 #define SSL3_RT_MAX_ENCRYPTED_LENGTH    (1024+SSL3_RT_MAX_COMPRESSED_LENGTH)
271 #define SSL3_RT_MAX_PACKET_SIZE         (SSL3_RT_MAX_ENCRYPTED_LENGTH+SSL3_RT_HEADER_LENGTH)
272 #define SSL3_RT_MAX_DATA_SIZE                   (1024*1024)
273
274 #define SSL3_MD_CLIENT_FINISHED_CONST   "\x43\x4C\x4E\x54"
275 #define SSL3_MD_SERVER_FINISHED_CONST   "\x53\x52\x56\x52"
276
277 #define SSL3_VERSION                    0x0300
278 #define SSL3_VERSION_MAJOR              0x03
279 #define SSL3_VERSION_MINOR              0x00
280
281 #define SSL3_RT_CHANGE_CIPHER_SPEC      20
282 #define SSL3_RT_ALERT                   21
283 #define SSL3_RT_HANDSHAKE               22
284 #define SSL3_RT_APPLICATION_DATA        23
285
286 #define SSL3_AL_WARNING                 1
287 #define SSL3_AL_FATAL                   2
288
289 #define SSL3_AD_CLOSE_NOTIFY             0
290 #define SSL3_AD_UNEXPECTED_MESSAGE      10      /* fatal */
291 #define SSL3_AD_BAD_RECORD_MAC          20      /* fatal */
292 #define SSL3_AD_DECOMPRESSION_FAILURE   30      /* fatal */
293 #define SSL3_AD_HANDSHAKE_FAILURE       40      /* fatal */
294 #define SSL3_AD_NO_CERTIFICATE          41
295 #define SSL3_AD_BAD_CERTIFICATE         42
296 #define SSL3_AD_UNSUPPORTED_CERTIFICATE 43
297 #define SSL3_AD_CERTIFICATE_REVOKED     44
298 #define SSL3_AD_CERTIFICATE_EXPIRED     45
299 #define SSL3_AD_CERTIFICATE_UNKNOWN     46
300 #define SSL3_AD_ILLEGAL_PARAMETER       47      /* fatal */
301
302 typedef struct ssl3_record_st
303         {
304                 /* type of record */
305 /*r */  int type;
306                 /* How many bytes available */
307 /*rw*/  unsigned int length;
308                 /* read/write offset into 'buf' */
309 /*r */  unsigned int off;
310                 /* pointer to the record data */
311 /*rw*/  unsigned char *data;
312                 /* where the decode bytes are */
313 /*rw*/  unsigned char *input;
314                 /* only used with decompression - malloc()ed */
315 /*r */  unsigned char *comp;
316                 /* epoch number, needed by DTLS1 */
317 /*r */  unsigned long epoch;
318                 /* sequence number, needed by DTLS1 */
319 /*r */  PQ_64BIT seq_num;
320         } SSL3_RECORD;
321
322 typedef struct ssl3_buffer_st
323         {
324         /* at least SSL3_RT_MAX_PACKET_SIZE bytes, see ssl3_setup_buffers() */
325         unsigned char *buf;
326         /* buffer size */
327         size_t len;
328         /* where to 'copy from' */
329         int offset;
330         /* how many bytes left */
331         int left;
332         } SSL3_BUFFER;
333
334 #define SSL3_CT_RSA_SIGN                        1
335 #define SSL3_CT_DSS_SIGN                        2
336 #define SSL3_CT_RSA_FIXED_DH                    3
337 #define SSL3_CT_DSS_FIXED_DH                    4
338 #define SSL3_CT_RSA_EPHEMERAL_DH                5
339 #define SSL3_CT_DSS_EPHEMERAL_DH                6
340 #define SSL3_CT_FORTEZZA_DMS                    20
341 /* SSL3_CT_NUMBER is used to size arrays and it must be large
342  * enough to contain all of the cert types defined either for
343  * SSLv3 and TLSv1.
344  */
345 #define SSL3_CT_NUMBER                  7
346
347
348 #define SSL3_FLAGS_NO_RENEGOTIATE_CIPHERS       0x0001
349 #define SSL3_FLAGS_DELAY_CLIENT_FINISHED        0x0002
350 #define SSL3_FLAGS_POP_BUFFER                   0x0004
351 #define TLS1_FLAGS_TLS_PADDING_BUG              0x0008
352 #define SSL3_FLAGS_CCS_OK                       0x0080
353  
354 /* SSL3_FLAGS_SGC_RESTART_DONE is set when we
355  * restart a handshake because of MS SGC and so prevents us
356  * from restarting the handshake in a loop. It's reset on a
357  * renegotiation, so effectively limits the client to one restart
358  * per negotiation. This limits the possibility of a DDoS
359  * attack where the client handshakes in a loop using SGC to
360  * restart. Servers which permit renegotiation can still be
361  * effected, but we can't prevent that.
362  */
363 #define SSL3_FLAGS_SGC_RESTART_DONE             0x0040
364
365 typedef struct ssl3_state_st
366         {
367         long flags;
368         int delay_buf_pop_ret;
369
370         unsigned char read_sequence[8];
371         unsigned char read_mac_secret[EVP_MAX_MD_SIZE];
372         unsigned char write_sequence[8];
373         unsigned char write_mac_secret[EVP_MAX_MD_SIZE];
374
375         unsigned char server_random[SSL3_RANDOM_SIZE];
376         unsigned char client_random[SSL3_RANDOM_SIZE];
377
378         /* flags for countermeasure against known-IV weakness */
379         int need_empty_fragments;
380         int empty_fragment_done;
381
382         SSL3_BUFFER rbuf;       /* read IO goes into here */
383         SSL3_BUFFER wbuf;       /* write IO goes into here */
384
385         SSL3_RECORD rrec;       /* each decoded record goes in here */
386         SSL3_RECORD wrec;       /* goes out from here */
387
388         /* storage for Alert/Handshake protocol data received but not
389          * yet processed by ssl3_read_bytes: */
390         unsigned char alert_fragment[2];
391         unsigned int alert_fragment_len;
392         unsigned char handshake_fragment[4];
393         unsigned int handshake_fragment_len;
394
395         /* partial write - check the numbers match */
396         unsigned int wnum;      /* number of bytes sent so far */
397         int wpend_tot;          /* number bytes written */
398         int wpend_type;
399         int wpend_ret;          /* number of bytes submitted */
400         const unsigned char *wpend_buf;
401
402         /* used during startup, digest all incoming/outgoing packets */
403         EVP_MD_CTX finish_dgst1;
404         EVP_MD_CTX finish_dgst2;
405
406         /* this is set whenerver we see a change_cipher_spec message
407          * come in when we are not looking for one */
408         int change_cipher_spec;
409
410         int warn_alert;
411         int fatal_alert;
412         /* we allow one fatal and one warning alert to be outstanding,
413          * send close alert via the warning alert */
414         int alert_dispatch;
415         unsigned char send_alert[2];
416
417         /* This flag is set when we should renegotiate ASAP, basically when
418          * there is no more data in the read or write buffers */
419         int renegotiate;
420         int total_renegotiations;
421         int num_renegotiations;
422
423         int in_read_app_data;
424
425         struct  {
426                 /* actually only needs to be 16+20 */
427                 unsigned char cert_verify_md[EVP_MAX_MD_SIZE*2];
428
429                 /* actually only need to be 16+20 for SSLv3 and 12 for TLS */
430                 unsigned char finish_md[EVP_MAX_MD_SIZE*2];
431                 int finish_md_len;
432                 unsigned char peer_finish_md[EVP_MAX_MD_SIZE*2];
433                 int peer_finish_md_len;
434                 
435                 unsigned long message_size;
436                 int message_type;
437
438                 /* used to hold the new cipher we are going to use */
439                 SSL_CIPHER *new_cipher;
440 #ifndef OPENSSL_NO_DH
441                 DH *dh;
442 #endif
443
444 #ifndef OPENSSL_NO_ECDH
445                 EC_KEY *ecdh; /* holds short lived ECDH key */
446 #endif
447
448                 /* used when SSL_ST_FLUSH_DATA is entered */
449                 int next_state;                 
450
451                 int reuse_message;
452
453                 /* used for certificate requests */
454                 int cert_req;
455                 int ctype_num;
456                 char ctype[SSL3_CT_NUMBER];
457                 STACK_OF(X509_NAME) *ca_names;
458
459                 int use_rsa_tmp;
460
461                 int key_block_length;
462                 unsigned char *key_block;
463
464                 const EVP_CIPHER *new_sym_enc;
465                 const EVP_MD *new_hash;
466 #ifndef OPENSSL_NO_COMP
467                 const SSL_COMP *new_compression;
468 #else
469                 char *new_compression;
470 #endif
471                 int cert_request;
472                 } tmp;
473
474         /* Connection binding to prevent renegotiation attacks */
475         unsigned char previous_client_finished[EVP_MAX_MD_SIZE];
476         unsigned char previous_client_finished_len;
477         unsigned char previous_server_finished[EVP_MAX_MD_SIZE];
478         unsigned char previous_server_finished_len;
479         int send_connection_binding; /* TODOEKR */
480
481 #ifndef OPENSSL_NO_TLSEXT
482 #ifndef OPENSSL_NO_EC
483         /* This is set to true if we believe that this is a version of Safari
484          * running on OS X 10.6 or newer. We wish to know this because Safari
485          * on 10.8 .. 10.8.3 has broken ECDHE-ECDSA support. */
486         char is_probably_safari;
487 #endif /* !OPENSSL_NO_EC */
488 #endif /* !OPENSSL_NO_TLSEXT */
489         } SSL3_STATE;
490
491
492 /* SSLv3 */
493 /*client */
494 /* extra state */
495 #define SSL3_ST_CW_FLUSH                (0x100|SSL_ST_CONNECT)
496 /* write to server */
497 #define SSL3_ST_CW_CLNT_HELLO_A         (0x110|SSL_ST_CONNECT)
498 #define SSL3_ST_CW_CLNT_HELLO_B         (0x111|SSL_ST_CONNECT)
499 /* read from server */
500 #define SSL3_ST_CR_SRVR_HELLO_A         (0x120|SSL_ST_CONNECT)
501 #define SSL3_ST_CR_SRVR_HELLO_B         (0x121|SSL_ST_CONNECT)
502 #define DTLS1_ST_CR_HELLO_VERIFY_REQUEST_A (0x126|SSL_ST_CONNECT)
503 #define DTLS1_ST_CR_HELLO_VERIFY_REQUEST_B (0x127|SSL_ST_CONNECT)
504 #define SSL3_ST_CR_CERT_A               (0x130|SSL_ST_CONNECT)
505 #define SSL3_ST_CR_CERT_B               (0x131|SSL_ST_CONNECT)
506 #define SSL3_ST_CR_KEY_EXCH_A           (0x140|SSL_ST_CONNECT)
507 #define SSL3_ST_CR_KEY_EXCH_B           (0x141|SSL_ST_CONNECT)
508 #define SSL3_ST_CR_CERT_REQ_A           (0x150|SSL_ST_CONNECT)
509 #define SSL3_ST_CR_CERT_REQ_B           (0x151|SSL_ST_CONNECT)
510 #define SSL3_ST_CR_SRVR_DONE_A          (0x160|SSL_ST_CONNECT)
511 #define SSL3_ST_CR_SRVR_DONE_B          (0x161|SSL_ST_CONNECT)
512 /* write to server */
513 #define SSL3_ST_CW_CERT_A               (0x170|SSL_ST_CONNECT)
514 #define SSL3_ST_CW_CERT_B               (0x171|SSL_ST_CONNECT)
515 #define SSL3_ST_CW_CERT_C               (0x172|SSL_ST_CONNECT)
516 #define SSL3_ST_CW_CERT_D               (0x173|SSL_ST_CONNECT)
517 #define SSL3_ST_CW_KEY_EXCH_A           (0x180|SSL_ST_CONNECT)
518 #define SSL3_ST_CW_KEY_EXCH_B           (0x181|SSL_ST_CONNECT)
519 #define SSL3_ST_CW_CERT_VRFY_A          (0x190|SSL_ST_CONNECT)
520 #define SSL3_ST_CW_CERT_VRFY_B          (0x191|SSL_ST_CONNECT)
521 #define SSL3_ST_CW_CHANGE_A             (0x1A0|SSL_ST_CONNECT)
522 #define SSL3_ST_CW_CHANGE_B             (0x1A1|SSL_ST_CONNECT)
523 #define SSL3_ST_CW_FINISHED_A           (0x1B0|SSL_ST_CONNECT)
524 #define SSL3_ST_CW_FINISHED_B           (0x1B1|SSL_ST_CONNECT)
525 /* read from server */
526 #define SSL3_ST_CR_CHANGE_A             (0x1C0|SSL_ST_CONNECT)
527 #define SSL3_ST_CR_CHANGE_B             (0x1C1|SSL_ST_CONNECT)
528 #define SSL3_ST_CR_FINISHED_A           (0x1D0|SSL_ST_CONNECT)
529 #define SSL3_ST_CR_FINISHED_B           (0x1D1|SSL_ST_CONNECT)
530 #define SSL3_ST_CR_SESSION_TICKET_A     (0x1E0|SSL_ST_CONNECT)
531 #define SSL3_ST_CR_SESSION_TICKET_B     (0x1E1|SSL_ST_CONNECT)
532 #define SSL3_ST_CR_CERT_STATUS_A        (0x1F0|SSL_ST_CONNECT)
533 #define SSL3_ST_CR_CERT_STATUS_B        (0x1F1|SSL_ST_CONNECT)
534
535 /* server */
536 /* extra state */
537 #define SSL3_ST_SW_FLUSH                (0x100|SSL_ST_ACCEPT)
538 /* read from client */
539 /* Do not change the number values, they do matter */
540 #define SSL3_ST_SR_CLNT_HELLO_A         (0x110|SSL_ST_ACCEPT)
541 #define SSL3_ST_SR_CLNT_HELLO_B         (0x111|SSL_ST_ACCEPT)
542 #define SSL3_ST_SR_CLNT_HELLO_C         (0x112|SSL_ST_ACCEPT)
543 /* write to client */
544 #define DTLS1_ST_SW_HELLO_VERIFY_REQUEST_A (0x113|SSL_ST_ACCEPT)
545 #define DTLS1_ST_SW_HELLO_VERIFY_REQUEST_B (0x114|SSL_ST_ACCEPT)
546 #define SSL3_ST_SW_HELLO_REQ_A          (0x120|SSL_ST_ACCEPT)
547 #define SSL3_ST_SW_HELLO_REQ_B          (0x121|SSL_ST_ACCEPT)
548 #define SSL3_ST_SW_HELLO_REQ_C          (0x122|SSL_ST_ACCEPT)
549 #define SSL3_ST_SW_SRVR_HELLO_A         (0x130|SSL_ST_ACCEPT)
550 #define SSL3_ST_SW_SRVR_HELLO_B         (0x131|SSL_ST_ACCEPT)
551 #define SSL3_ST_SW_CERT_A               (0x140|SSL_ST_ACCEPT)
552 #define SSL3_ST_SW_CERT_B               (0x141|SSL_ST_ACCEPT)
553 #define SSL3_ST_SW_KEY_EXCH_A           (0x150|SSL_ST_ACCEPT)
554 #define SSL3_ST_SW_KEY_EXCH_B           (0x151|SSL_ST_ACCEPT)
555 #define SSL3_ST_SW_CERT_REQ_A           (0x160|SSL_ST_ACCEPT)
556 #define SSL3_ST_SW_CERT_REQ_B           (0x161|SSL_ST_ACCEPT)
557 #define SSL3_ST_SW_SRVR_DONE_A          (0x170|SSL_ST_ACCEPT)
558 #define SSL3_ST_SW_SRVR_DONE_B          (0x171|SSL_ST_ACCEPT)
559 /* read from client */
560 #define SSL3_ST_SR_CERT_A               (0x180|SSL_ST_ACCEPT)
561 #define SSL3_ST_SR_CERT_B               (0x181|SSL_ST_ACCEPT)
562 #define SSL3_ST_SR_KEY_EXCH_A           (0x190|SSL_ST_ACCEPT)
563 #define SSL3_ST_SR_KEY_EXCH_B           (0x191|SSL_ST_ACCEPT)
564 #define SSL3_ST_SR_CERT_VRFY_A          (0x1A0|SSL_ST_ACCEPT)
565 #define SSL3_ST_SR_CERT_VRFY_B          (0x1A1|SSL_ST_ACCEPT)
566 #define SSL3_ST_SR_CHANGE_A             (0x1B0|SSL_ST_ACCEPT)
567 #define SSL3_ST_SR_CHANGE_B             (0x1B1|SSL_ST_ACCEPT)
568 #define SSL3_ST_SR_FINISHED_A           (0x1C0|SSL_ST_ACCEPT)
569 #define SSL3_ST_SR_FINISHED_B           (0x1C1|SSL_ST_ACCEPT)
570 /* write to client */
571 #define SSL3_ST_SW_CHANGE_A             (0x1D0|SSL_ST_ACCEPT)
572 #define SSL3_ST_SW_CHANGE_B             (0x1D1|SSL_ST_ACCEPT)
573 #define SSL3_ST_SW_FINISHED_A           (0x1E0|SSL_ST_ACCEPT)
574 #define SSL3_ST_SW_FINISHED_B           (0x1E1|SSL_ST_ACCEPT)
575 #define SSL3_ST_SW_SESSION_TICKET_A     (0x1F0|SSL_ST_ACCEPT)
576 #define SSL3_ST_SW_SESSION_TICKET_B     (0x1F1|SSL_ST_ACCEPT)
577 #define SSL3_ST_SW_CERT_STATUS_A        (0x200|SSL_ST_ACCEPT)
578 #define SSL3_ST_SW_CERT_STATUS_B        (0x201|SSL_ST_ACCEPT)
579
580 #define SSL3_MT_HELLO_REQUEST                   0
581 #define SSL3_MT_CLIENT_HELLO                    1
582 #define SSL3_MT_SERVER_HELLO                    2
583 #define SSL3_MT_NEWSESSION_TICKET               4
584 #define SSL3_MT_CERTIFICATE                     11
585 #define SSL3_MT_SERVER_KEY_EXCHANGE             12
586 #define SSL3_MT_CERTIFICATE_REQUEST             13
587 #define SSL3_MT_SERVER_DONE                     14
588 #define SSL3_MT_CERTIFICATE_VERIFY              15
589 #define SSL3_MT_CLIENT_KEY_EXCHANGE             16
590 #define SSL3_MT_FINISHED                        20
591 #define SSL3_MT_CERTIFICATE_STATUS              22
592 #define DTLS1_MT_HELLO_VERIFY_REQUEST    3
593
594
595 #define SSL3_MT_CCS                             1
596
597 /* These are used when changing over to a new cipher */
598 #define SSL3_CC_READ            0x01
599 #define SSL3_CC_WRITE           0x02
600 #define SSL3_CC_CLIENT          0x10
601 #define SSL3_CC_SERVER          0x20
602 #define SSL3_CHANGE_CIPHER_CLIENT_WRITE (SSL3_CC_CLIENT|SSL3_CC_WRITE)  
603 #define SSL3_CHANGE_CIPHER_SERVER_READ  (SSL3_CC_SERVER|SSL3_CC_READ)
604 #define SSL3_CHANGE_CIPHER_CLIENT_READ  (SSL3_CC_CLIENT|SSL3_CC_READ)
605 #define SSL3_CHANGE_CIPHER_SERVER_WRITE (SSL3_CC_SERVER|SSL3_CC_WRITE)
606
607 #ifdef  __cplusplus
608 }
609 #endif
610 #endif
611