3aab0800c111c15875e4bd557b8c035e04035c55
[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 draft-ietf-tls-renegotiation-03.txt */
133 #define SSL3_CK_SCSV                            0x030000FF
134
135 #define SSL3_CK_RSA_NULL_MD5                    0x03000001
136 #define SSL3_CK_RSA_NULL_SHA                    0x03000002
137 #define SSL3_CK_RSA_RC4_40_MD5                  0x03000003
138 #define SSL3_CK_RSA_RC4_128_MD5                 0x03000004
139 #define SSL3_CK_RSA_RC4_128_SHA                 0x03000005
140 #define SSL3_CK_RSA_RC2_40_MD5                  0x03000006
141 #define SSL3_CK_RSA_IDEA_128_SHA                0x03000007
142 #define SSL3_CK_RSA_DES_40_CBC_SHA              0x03000008
143 #define SSL3_CK_RSA_DES_64_CBC_SHA              0x03000009
144 #define SSL3_CK_RSA_DES_192_CBC3_SHA            0x0300000A
145
146 #define SSL3_CK_DH_DSS_DES_40_CBC_SHA           0x0300000B
147 #define SSL3_CK_DH_DSS_DES_64_CBC_SHA           0x0300000C
148 #define SSL3_CK_DH_DSS_DES_192_CBC3_SHA         0x0300000D
149 #define SSL3_CK_DH_RSA_DES_40_CBC_SHA           0x0300000E
150 #define SSL3_CK_DH_RSA_DES_64_CBC_SHA           0x0300000F
151 #define SSL3_CK_DH_RSA_DES_192_CBC3_SHA         0x03000010
152
153 #define SSL3_CK_EDH_DSS_DES_40_CBC_SHA          0x03000011
154 #define SSL3_CK_EDH_DSS_DES_64_CBC_SHA          0x03000012
155 #define SSL3_CK_EDH_DSS_DES_192_CBC3_SHA        0x03000013
156 #define SSL3_CK_EDH_RSA_DES_40_CBC_SHA          0x03000014
157 #define SSL3_CK_EDH_RSA_DES_64_CBC_SHA          0x03000015
158 #define SSL3_CK_EDH_RSA_DES_192_CBC3_SHA        0x03000016
159
160 #define SSL3_CK_ADH_RC4_40_MD5                  0x03000017
161 #define SSL3_CK_ADH_RC4_128_MD5                 0x03000018
162 #define SSL3_CK_ADH_DES_40_CBC_SHA              0x03000019
163 #define SSL3_CK_ADH_DES_64_CBC_SHA              0x0300001A
164 #define SSL3_CK_ADH_DES_192_CBC_SHA             0x0300001B
165
166 #define SSL3_CK_FZA_DMS_NULL_SHA                0x0300001C
167 #define SSL3_CK_FZA_DMS_FZA_SHA                 0x0300001D
168 #if 0 /* Because it clashes with KRB5, is never used any more, and is safe
169          to remove according to David Hopwood <david.hopwood@zetnet.co.uk>
170          of the ietf-tls list */
171 #define SSL3_CK_FZA_DMS_RC4_SHA                 0x0300001E
172 #endif
173
174 /*    VRS Additional Kerberos5 entries
175  */
176 #define SSL3_CK_KRB5_DES_64_CBC_SHA             0x0300001E
177 #define SSL3_CK_KRB5_DES_192_CBC3_SHA           0x0300001F
178 #define SSL3_CK_KRB5_RC4_128_SHA                0x03000020
179 #define SSL3_CK_KRB5_IDEA_128_CBC_SHA           0x03000021
180 #define SSL3_CK_KRB5_DES_64_CBC_MD5             0x03000022
181 #define SSL3_CK_KRB5_DES_192_CBC3_MD5           0x03000023
182 #define SSL3_CK_KRB5_RC4_128_MD5                0x03000024
183 #define SSL3_CK_KRB5_IDEA_128_CBC_MD5           0x03000025
184
185 #define SSL3_CK_KRB5_DES_40_CBC_SHA             0x03000026
186 #define SSL3_CK_KRB5_RC2_40_CBC_SHA             0x03000027
187 #define SSL3_CK_KRB5_RC4_40_SHA                 0x03000028
188 #define SSL3_CK_KRB5_DES_40_CBC_MD5             0x03000029
189 #define SSL3_CK_KRB5_RC2_40_CBC_MD5             0x0300002A
190 #define SSL3_CK_KRB5_RC4_40_MD5                 0x0300002B
191
192 #define SSL3_TXT_RSA_NULL_MD5                   "NULL-MD5"
193 #define SSL3_TXT_RSA_NULL_SHA                   "NULL-SHA"
194 #define SSL3_TXT_RSA_RC4_40_MD5                 "EXP-RC4-MD5"
195 #define SSL3_TXT_RSA_RC4_128_MD5                "RC4-MD5"
196 #define SSL3_TXT_RSA_RC4_128_SHA                "RC4-SHA"
197 #define SSL3_TXT_RSA_RC2_40_MD5                 "EXP-RC2-CBC-MD5"
198 #define SSL3_TXT_RSA_IDEA_128_SHA               "IDEA-CBC-SHA"
199 #define SSL3_TXT_RSA_DES_40_CBC_SHA             "EXP-DES-CBC-SHA"
200 #define SSL3_TXT_RSA_DES_64_CBC_SHA             "DES-CBC-SHA"
201 #define SSL3_TXT_RSA_DES_192_CBC3_SHA           "DES-CBC3-SHA"
202
203 #define SSL3_TXT_DH_DSS_DES_40_CBC_SHA          "EXP-DH-DSS-DES-CBC-SHA"
204 #define SSL3_TXT_DH_DSS_DES_64_CBC_SHA          "DH-DSS-DES-CBC-SHA"
205 #define SSL3_TXT_DH_DSS_DES_192_CBC3_SHA        "DH-DSS-DES-CBC3-SHA"
206 #define SSL3_TXT_DH_RSA_DES_40_CBC_SHA          "EXP-DH-RSA-DES-CBC-SHA"
207 #define SSL3_TXT_DH_RSA_DES_64_CBC_SHA          "DH-RSA-DES-CBC-SHA"
208 #define SSL3_TXT_DH_RSA_DES_192_CBC3_SHA        "DH-RSA-DES-CBC3-SHA"
209
210 #define SSL3_TXT_EDH_DSS_DES_40_CBC_SHA         "EXP-EDH-DSS-DES-CBC-SHA"
211 #define SSL3_TXT_EDH_DSS_DES_64_CBC_SHA         "EDH-DSS-DES-CBC-SHA"
212 #define SSL3_TXT_EDH_DSS_DES_192_CBC3_SHA       "EDH-DSS-DES-CBC3-SHA"
213 #define SSL3_TXT_EDH_RSA_DES_40_CBC_SHA         "EXP-EDH-RSA-DES-CBC-SHA"
214 #define SSL3_TXT_EDH_RSA_DES_64_CBC_SHA         "EDH-RSA-DES-CBC-SHA"
215 #define SSL3_TXT_EDH_RSA_DES_192_CBC3_SHA       "EDH-RSA-DES-CBC3-SHA"
216
217 #define SSL3_TXT_ADH_RC4_40_MD5                 "EXP-ADH-RC4-MD5"
218 #define SSL3_TXT_ADH_RC4_128_MD5                "ADH-RC4-MD5"
219 #define SSL3_TXT_ADH_DES_40_CBC_SHA             "EXP-ADH-DES-CBC-SHA"
220 #define SSL3_TXT_ADH_DES_64_CBC_SHA             "ADH-DES-CBC-SHA"
221 #define SSL3_TXT_ADH_DES_192_CBC_SHA            "ADH-DES-CBC3-SHA"
222
223 #define SSL3_TXT_FZA_DMS_NULL_SHA               "FZA-NULL-SHA"
224 #define SSL3_TXT_FZA_DMS_FZA_SHA                "FZA-FZA-CBC-SHA"
225 #define SSL3_TXT_FZA_DMS_RC4_SHA                "FZA-RC4-SHA"
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 /* Due to MS stuffing up, this can change.... */
252 #if defined(OPENSSL_SYS_WIN16) || \
253         (defined(OPENSSL_SYS_MSDOS) && !defined(OPENSSL_SYS_WIN32))
254 #define SSL3_RT_MAX_EXTRA                       (14000)
255 #else
256 #define SSL3_RT_MAX_EXTRA                       (16384)
257 #endif
258
259 #define SSL3_RT_MAX_PLAIN_LENGTH                16384
260 #ifdef OPENSSL_NO_COMP
261 #define SSL3_RT_MAX_COMPRESSED_LENGTH   SSL3_RT_MAX_PLAIN_LENGTH
262 #else
263 #define SSL3_RT_MAX_COMPRESSED_LENGTH   (1024+SSL3_RT_MAX_PLAIN_LENGTH)
264 #endif
265 #define SSL3_RT_MAX_ENCRYPTED_LENGTH    (1024+SSL3_RT_MAX_COMPRESSED_LENGTH)
266 #define SSL3_RT_MAX_PACKET_SIZE         (SSL3_RT_MAX_ENCRYPTED_LENGTH+SSL3_RT_HEADER_LENGTH)
267 #define SSL3_RT_MAX_DATA_SIZE                   (1024*1024)
268
269 #define SSL3_MD_CLIENT_FINISHED_CONST   "\x43\x4C\x4E\x54"
270 #define SSL3_MD_SERVER_FINISHED_CONST   "\x53\x52\x56\x52"
271
272 #define SSL3_VERSION                    0x0300
273 #define SSL3_VERSION_MAJOR              0x03
274 #define SSL3_VERSION_MINOR              0x00
275
276 #define SSL3_RT_CHANGE_CIPHER_SPEC      20
277 #define SSL3_RT_ALERT                   21
278 #define SSL3_RT_HANDSHAKE               22
279 #define SSL3_RT_APPLICATION_DATA        23
280
281 #define SSL3_AL_WARNING                 1
282 #define SSL3_AL_FATAL                   2
283
284 #define SSL3_AD_CLOSE_NOTIFY             0
285 #define SSL3_AD_UNEXPECTED_MESSAGE      10      /* fatal */
286 #define SSL3_AD_BAD_RECORD_MAC          20      /* fatal */
287 #define SSL3_AD_DECOMPRESSION_FAILURE   30      /* fatal */
288 #define SSL3_AD_HANDSHAKE_FAILURE       40      /* fatal */
289 #define SSL3_AD_NO_CERTIFICATE          41
290 #define SSL3_AD_BAD_CERTIFICATE         42
291 #define SSL3_AD_UNSUPPORTED_CERTIFICATE 43
292 #define SSL3_AD_CERTIFICATE_REVOKED     44
293 #define SSL3_AD_CERTIFICATE_EXPIRED     45
294 #define SSL3_AD_CERTIFICATE_UNKNOWN     46
295 #define SSL3_AD_ILLEGAL_PARAMETER       47      /* fatal */
296
297 typedef struct ssl3_record_st
298         {
299 /*r */  int type;               /* type of record */
300 /*rw*/  unsigned int length;    /* How many bytes available */
301 /*r */  unsigned int off;       /* read/write offset into 'buf' */
302 /*rw*/  unsigned char *data;    /* pointer to the record data */
303 /*rw*/  unsigned char *input;   /* where the decode bytes are */
304 /*r */  unsigned char *comp;    /* only used with decompression - malloc()ed */
305 /*r */  unsigned long epoch;    /* epoch number, needed by DTLS1 */
306 /*r */  PQ_64BIT seq_num;       /* sequence number, needed by DTLS1 */
307         } SSL3_RECORD;
308
309 typedef struct ssl3_buffer_st
310         {
311         unsigned char *buf;     /* at least SSL3_RT_MAX_PACKET_SIZE bytes,
312                                  * see ssl3_setup_buffers() */
313         size_t len;             /* buffer size */
314         int offset;             /* where to 'copy from' */
315         int left;               /* how many bytes left */
316         } SSL3_BUFFER;
317
318 #define SSL3_CT_RSA_SIGN                        1
319 #define SSL3_CT_DSS_SIGN                        2
320 #define SSL3_CT_RSA_FIXED_DH                    3
321 #define SSL3_CT_DSS_FIXED_DH                    4
322 #define SSL3_CT_RSA_EPHEMERAL_DH                5
323 #define SSL3_CT_DSS_EPHEMERAL_DH                6
324 #define SSL3_CT_FORTEZZA_DMS                    20
325 /* SSL3_CT_NUMBER is used to size arrays and it must be large
326  * enough to contain all of the cert types defined either for
327  * SSLv3 and TLSv1.
328  */
329 #define SSL3_CT_NUMBER                  7
330
331
332 #define SSL3_FLAGS_NO_RENEGOTIATE_CIPHERS       0x0001
333 #define SSL3_FLAGS_DELAY_CLIENT_FINISHED        0x0002
334 #define SSL3_FLAGS_POP_BUFFER                   0x0004
335 #define TLS1_FLAGS_TLS_PADDING_BUG              0x0008
336  
337 /* SSL3_FLAGS_SGC_RESTART_DONE is set when we
338  * restart a handshake because of MS SGC and so prevents us
339  * from restarting the handshake in a loop. It's reset on a
340  * renegotiation, so effectively limits the client to one restart
341  * per negotiation. This limits the possibility of a DDoS
342  * attack where the client handshakes in a loop using SGC to
343  * restart. Servers which permit renegotiation can still be
344  * effected, but we can't prevent that.
345  */
346 #define SSL3_FLAGS_SGC_RESTART_DONE             0x0040
347
348 typedef struct ssl3_state_st
349         {
350         long flags;
351         int delay_buf_pop_ret;
352
353         unsigned char read_sequence[8];
354         unsigned char read_mac_secret[EVP_MAX_MD_SIZE];
355         unsigned char write_sequence[8];
356         unsigned char write_mac_secret[EVP_MAX_MD_SIZE];
357
358         unsigned char server_random[SSL3_RANDOM_SIZE];
359         unsigned char client_random[SSL3_RANDOM_SIZE];
360
361         /* flags for countermeasure against known-IV weakness */
362         int need_empty_fragments;
363         int empty_fragment_done;
364
365         SSL3_BUFFER rbuf;       /* read IO goes into here */
366         SSL3_BUFFER wbuf;       /* write IO goes into here */
367
368         SSL3_RECORD rrec;       /* each decoded record goes in here */
369         SSL3_RECORD wrec;       /* goes out from here */
370
371         /* storage for Alert/Handshake protocol data received but not
372          * yet processed by ssl3_read_bytes: */
373         unsigned char alert_fragment[2];
374         unsigned int alert_fragment_len;
375         unsigned char handshake_fragment[4];
376         unsigned int handshake_fragment_len;
377
378         /* partial write - check the numbers match */
379         unsigned int wnum;      /* number of bytes sent so far */
380         int wpend_tot;          /* number bytes written */
381         int wpend_type;
382         int wpend_ret;          /* number of bytes submitted */
383         const unsigned char *wpend_buf;
384
385         /* used during startup, digest all incoming/outgoing packets */
386         EVP_MD_CTX finish_dgst1;
387         EVP_MD_CTX finish_dgst2;
388
389         /* this is set whenerver we see a change_cipher_spec message
390          * come in when we are not looking for one */
391         int change_cipher_spec;
392
393         int warn_alert;
394         int fatal_alert;
395         /* we allow one fatal and one warning alert to be outstanding,
396          * send close alert via the warning alert */
397         int alert_dispatch;
398         unsigned char send_alert[2];
399
400         /* This flag is set when we should renegotiate ASAP, basically when
401          * there is no more data in the read or write buffers */
402         int renegotiate;
403         int total_renegotiations;
404         int num_renegotiations;
405
406         int in_read_app_data;
407
408         struct  {
409                 /* actually only needs to be 16+20 */
410                 unsigned char cert_verify_md[EVP_MAX_MD_SIZE*2];
411
412                 /* actually only need to be 16+20 for SSLv3 and 12 for TLS */
413                 unsigned char finish_md[EVP_MAX_MD_SIZE*2];
414                 int finish_md_len;
415                 unsigned char peer_finish_md[EVP_MAX_MD_SIZE*2];
416                 int peer_finish_md_len;
417                 
418                 unsigned long message_size;
419                 int message_type;
420
421                 /* used to hold the new cipher we are going to use */
422                 SSL_CIPHER *new_cipher;
423 #ifndef OPENSSL_NO_DH
424                 DH *dh;
425 #endif
426
427 #ifndef OPENSSL_NO_ECDH
428                 EC_KEY *ecdh; /* holds short lived ECDH key */
429 #endif
430
431                 /* used when SSL_ST_FLUSH_DATA is entered */
432                 int next_state;                 
433
434                 int reuse_message;
435
436                 /* used for certificate requests */
437                 int cert_req;
438                 int ctype_num;
439                 char ctype[SSL3_CT_NUMBER];
440                 STACK_OF(X509_NAME) *ca_names;
441
442                 int use_rsa_tmp;
443
444                 int key_block_length;
445                 unsigned char *key_block;
446
447                 const EVP_CIPHER *new_sym_enc;
448                 const EVP_MD *new_hash;
449 #ifndef OPENSSL_NO_COMP
450                 const SSL_COMP *new_compression;
451 #else
452                 char *new_compression;
453 #endif
454                 int cert_request;
455                 } tmp;
456
457         /* Connection binding to prevent renegotiation attacks */
458         unsigned char previous_client_finished[EVP_MAX_MD_SIZE];
459         unsigned char previous_client_finished_len;
460         unsigned char previous_server_finished[EVP_MAX_MD_SIZE];
461         unsigned char previous_server_finished_len;
462         int send_connection_binding; /* TODOEKR */
463
464 #ifndef OPENSSL_NO_TLSEXT
465 #ifndef OPENSSL_NO_EC
466         /* This is set to true if we believe that this is a version of Safari
467          * running on OS X 10.6 or newer. We wish to know this because Safari
468          * on 10.8 .. 10.8.3 has broken ECDHE-ECDSA support. */
469         char is_probably_safari;
470 #endif /* !OPENSSL_NO_EC */
471 #endif /* !OPENSSL_NO_TLSEXT */
472         } SSL3_STATE;
473
474
475 /* SSLv3 */
476 /*client */
477 /* extra state */
478 #define SSL3_ST_CW_FLUSH                (0x100|SSL_ST_CONNECT)
479 /* write to server */
480 #define SSL3_ST_CW_CLNT_HELLO_A         (0x110|SSL_ST_CONNECT)
481 #define SSL3_ST_CW_CLNT_HELLO_B         (0x111|SSL_ST_CONNECT)
482 /* read from server */
483 #define SSL3_ST_CR_SRVR_HELLO_A         (0x120|SSL_ST_CONNECT)
484 #define SSL3_ST_CR_SRVR_HELLO_B         (0x121|SSL_ST_CONNECT)
485 #define DTLS1_ST_CR_HELLO_VERIFY_REQUEST_A (0x126|SSL_ST_CONNECT)
486 #define DTLS1_ST_CR_HELLO_VERIFY_REQUEST_B (0x127|SSL_ST_CONNECT)
487 #define SSL3_ST_CR_CERT_A               (0x130|SSL_ST_CONNECT)
488 #define SSL3_ST_CR_CERT_B               (0x131|SSL_ST_CONNECT)
489 #define SSL3_ST_CR_KEY_EXCH_A           (0x140|SSL_ST_CONNECT)
490 #define SSL3_ST_CR_KEY_EXCH_B           (0x141|SSL_ST_CONNECT)
491 #define SSL3_ST_CR_CERT_REQ_A           (0x150|SSL_ST_CONNECT)
492 #define SSL3_ST_CR_CERT_REQ_B           (0x151|SSL_ST_CONNECT)
493 #define SSL3_ST_CR_SRVR_DONE_A          (0x160|SSL_ST_CONNECT)
494 #define SSL3_ST_CR_SRVR_DONE_B          (0x161|SSL_ST_CONNECT)
495 /* write to server */
496 #define SSL3_ST_CW_CERT_A               (0x170|SSL_ST_CONNECT)
497 #define SSL3_ST_CW_CERT_B               (0x171|SSL_ST_CONNECT)
498 #define SSL3_ST_CW_CERT_C               (0x172|SSL_ST_CONNECT)
499 #define SSL3_ST_CW_CERT_D               (0x173|SSL_ST_CONNECT)
500 #define SSL3_ST_CW_KEY_EXCH_A           (0x180|SSL_ST_CONNECT)
501 #define SSL3_ST_CW_KEY_EXCH_B           (0x181|SSL_ST_CONNECT)
502 #define SSL3_ST_CW_CERT_VRFY_A          (0x190|SSL_ST_CONNECT)
503 #define SSL3_ST_CW_CERT_VRFY_B          (0x191|SSL_ST_CONNECT)
504 #define SSL3_ST_CW_CHANGE_A             (0x1A0|SSL_ST_CONNECT)
505 #define SSL3_ST_CW_CHANGE_B             (0x1A1|SSL_ST_CONNECT)
506 #define SSL3_ST_CW_FINISHED_A           (0x1B0|SSL_ST_CONNECT)
507 #define SSL3_ST_CW_FINISHED_B           (0x1B1|SSL_ST_CONNECT)
508 /* read from server */
509 #define SSL3_ST_CR_CHANGE_A             (0x1C0|SSL_ST_CONNECT)
510 #define SSL3_ST_CR_CHANGE_B             (0x1C1|SSL_ST_CONNECT)
511 #define SSL3_ST_CR_FINISHED_A           (0x1D0|SSL_ST_CONNECT)
512 #define SSL3_ST_CR_FINISHED_B           (0x1D1|SSL_ST_CONNECT)
513 #define SSL3_ST_CR_SESSION_TICKET_A     (0x1E0|SSL_ST_CONNECT)
514 #define SSL3_ST_CR_SESSION_TICKET_B     (0x1E1|SSL_ST_CONNECT)
515 #define SSL3_ST_CR_CERT_STATUS_A        (0x1F0|SSL_ST_CONNECT)
516 #define SSL3_ST_CR_CERT_STATUS_B        (0x1F1|SSL_ST_CONNECT)
517
518 /* server */
519 /* extra state */
520 #define SSL3_ST_SW_FLUSH                (0x100|SSL_ST_ACCEPT)
521 /* read from client */
522 /* Do not change the number values, they do matter */
523 #define SSL3_ST_SR_CLNT_HELLO_A         (0x110|SSL_ST_ACCEPT)
524 #define SSL3_ST_SR_CLNT_HELLO_B         (0x111|SSL_ST_ACCEPT)
525 #define SSL3_ST_SR_CLNT_HELLO_C         (0x112|SSL_ST_ACCEPT)
526 /* write to client */
527 #define DTLS1_ST_SW_HELLO_VERIFY_REQUEST_A (0x113|SSL_ST_ACCEPT)
528 #define DTLS1_ST_SW_HELLO_VERIFY_REQUEST_B (0x114|SSL_ST_ACCEPT)
529 #define SSL3_ST_SW_HELLO_REQ_A          (0x120|SSL_ST_ACCEPT)
530 #define SSL3_ST_SW_HELLO_REQ_B          (0x121|SSL_ST_ACCEPT)
531 #define SSL3_ST_SW_HELLO_REQ_C          (0x122|SSL_ST_ACCEPT)
532 #define SSL3_ST_SW_SRVR_HELLO_A         (0x130|SSL_ST_ACCEPT)
533 #define SSL3_ST_SW_SRVR_HELLO_B         (0x131|SSL_ST_ACCEPT)
534 #define SSL3_ST_SW_CERT_A               (0x140|SSL_ST_ACCEPT)
535 #define SSL3_ST_SW_CERT_B               (0x141|SSL_ST_ACCEPT)
536 #define SSL3_ST_SW_KEY_EXCH_A           (0x150|SSL_ST_ACCEPT)
537 #define SSL3_ST_SW_KEY_EXCH_B           (0x151|SSL_ST_ACCEPT)
538 #define SSL3_ST_SW_CERT_REQ_A           (0x160|SSL_ST_ACCEPT)
539 #define SSL3_ST_SW_CERT_REQ_B           (0x161|SSL_ST_ACCEPT)
540 #define SSL3_ST_SW_SRVR_DONE_A          (0x170|SSL_ST_ACCEPT)
541 #define SSL3_ST_SW_SRVR_DONE_B          (0x171|SSL_ST_ACCEPT)
542 /* read from client */
543 #define SSL3_ST_SR_CERT_A               (0x180|SSL_ST_ACCEPT)
544 #define SSL3_ST_SR_CERT_B               (0x181|SSL_ST_ACCEPT)
545 #define SSL3_ST_SR_KEY_EXCH_A           (0x190|SSL_ST_ACCEPT)
546 #define SSL3_ST_SR_KEY_EXCH_B           (0x191|SSL_ST_ACCEPT)
547 #define SSL3_ST_SR_CERT_VRFY_A          (0x1A0|SSL_ST_ACCEPT)
548 #define SSL3_ST_SR_CERT_VRFY_B          (0x1A1|SSL_ST_ACCEPT)
549 #define SSL3_ST_SR_CHANGE_A             (0x1B0|SSL_ST_ACCEPT)
550 #define SSL3_ST_SR_CHANGE_B             (0x1B1|SSL_ST_ACCEPT)
551 #define SSL3_ST_SR_FINISHED_A           (0x1C0|SSL_ST_ACCEPT)
552 #define SSL3_ST_SR_FINISHED_B           (0x1C1|SSL_ST_ACCEPT)
553 /* write to client */
554 #define SSL3_ST_SW_CHANGE_A             (0x1D0|SSL_ST_ACCEPT)
555 #define SSL3_ST_SW_CHANGE_B             (0x1D1|SSL_ST_ACCEPT)
556 #define SSL3_ST_SW_FINISHED_A           (0x1E0|SSL_ST_ACCEPT)
557 #define SSL3_ST_SW_FINISHED_B           (0x1E1|SSL_ST_ACCEPT)
558 #define SSL3_ST_SW_SESSION_TICKET_A     (0x1F0|SSL_ST_ACCEPT)
559 #define SSL3_ST_SW_SESSION_TICKET_B     (0x1F1|SSL_ST_ACCEPT)
560 #define SSL3_ST_SW_CERT_STATUS_A        (0x200|SSL_ST_ACCEPT)
561 #define SSL3_ST_SW_CERT_STATUS_B        (0x201|SSL_ST_ACCEPT)
562
563 #define SSL3_MT_HELLO_REQUEST                   0
564 #define SSL3_MT_CLIENT_HELLO                    1
565 #define SSL3_MT_SERVER_HELLO                    2
566 #define SSL3_MT_NEWSESSION_TICKET               4
567 #define SSL3_MT_CERTIFICATE                     11
568 #define SSL3_MT_SERVER_KEY_EXCHANGE             12
569 #define SSL3_MT_CERTIFICATE_REQUEST             13
570 #define SSL3_MT_SERVER_DONE                     14
571 #define SSL3_MT_CERTIFICATE_VERIFY              15
572 #define SSL3_MT_CLIENT_KEY_EXCHANGE             16
573 #define SSL3_MT_FINISHED                        20
574 #define SSL3_MT_CERTIFICATE_STATUS              22
575 #define DTLS1_MT_HELLO_VERIFY_REQUEST    3
576
577
578 #define SSL3_MT_CCS                             1
579
580 /* These are used when changing over to a new cipher */
581 #define SSL3_CC_READ            0x01
582 #define SSL3_CC_WRITE           0x02
583 #define SSL3_CC_CLIENT          0x10
584 #define SSL3_CC_SERVER          0x20
585 #define SSL3_CHANGE_CIPHER_CLIENT_WRITE (SSL3_CC_CLIENT|SSL3_CC_WRITE)  
586 #define SSL3_CHANGE_CIPHER_SERVER_READ  (SSL3_CC_SERVER|SSL3_CC_READ)
587 #define SSL3_CHANGE_CIPHER_CLIENT_READ  (SSL3_CC_CLIENT|SSL3_CC_READ)
588 #define SSL3_CHANGE_CIPHER_SERVER_WRITE (SSL3_CC_SERVER|SSL3_CC_WRITE)
589
590 #ifdef  __cplusplus
591 }
592 #endif
593 #endif
594