xref: /minix/crypto/external/bsd/openssl/dist/ssl/ssl3.h (revision 0a6a1f1d)
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 
127 #ifdef  __cplusplus
128 extern "C" {
129 #endif
130 
131 /*
132  * Signalling cipher suite value from RFC 5746
133  * (TLS_EMPTY_RENEGOTIATION_INFO_SCSV)
134  */
135 # define SSL3_CK_SCSV                            0x030000FF
136 
137 /*
138  * Signalling cipher suite value from draft-ietf-tls-downgrade-scsv-00
139  * (TLS_FALLBACK_SCSV)
140  */
141 # define SSL3_CK_FALLBACK_SCSV                   0x03005600
142 
143 # define SSL3_CK_RSA_NULL_MD5                    0x03000001
144 # define SSL3_CK_RSA_NULL_SHA                    0x03000002
145 # define SSL3_CK_RSA_RC4_40_MD5                  0x03000003
146 # define SSL3_CK_RSA_RC4_128_MD5                 0x03000004
147 # define SSL3_CK_RSA_RC4_128_SHA                 0x03000005
148 # define SSL3_CK_RSA_RC2_40_MD5                  0x03000006
149 # define SSL3_CK_RSA_IDEA_128_SHA                0x03000007
150 # define SSL3_CK_RSA_DES_40_CBC_SHA              0x03000008
151 # define SSL3_CK_RSA_DES_64_CBC_SHA              0x03000009
152 # define SSL3_CK_RSA_DES_192_CBC3_SHA            0x0300000A
153 
154 # define SSL3_CK_DH_DSS_DES_40_CBC_SHA           0x0300000B
155 # define SSL3_CK_DH_DSS_DES_64_CBC_SHA           0x0300000C
156 # define SSL3_CK_DH_DSS_DES_192_CBC3_SHA         0x0300000D
157 # define SSL3_CK_DH_RSA_DES_40_CBC_SHA           0x0300000E
158 # define SSL3_CK_DH_RSA_DES_64_CBC_SHA           0x0300000F
159 # define SSL3_CK_DH_RSA_DES_192_CBC3_SHA         0x03000010
160 
161 # define SSL3_CK_EDH_DSS_DES_40_CBC_SHA          0x03000011
162 # define SSL3_CK_EDH_DSS_DES_64_CBC_SHA          0x03000012
163 # define SSL3_CK_EDH_DSS_DES_192_CBC3_SHA        0x03000013
164 # define SSL3_CK_EDH_RSA_DES_40_CBC_SHA          0x03000014
165 # define SSL3_CK_EDH_RSA_DES_64_CBC_SHA          0x03000015
166 # define SSL3_CK_EDH_RSA_DES_192_CBC3_SHA        0x03000016
167 
168 # define SSL3_CK_ADH_RC4_40_MD5                  0x03000017
169 # define SSL3_CK_ADH_RC4_128_MD5                 0x03000018
170 # define SSL3_CK_ADH_DES_40_CBC_SHA              0x03000019
171 # define SSL3_CK_ADH_DES_64_CBC_SHA              0x0300001A
172 # define SSL3_CK_ADH_DES_192_CBC_SHA             0x0300001B
173 
174 # if 0
175 #  define SSL3_CK_FZA_DMS_NULL_SHA                0x0300001C
176 #  define SSL3_CK_FZA_DMS_FZA_SHA                 0x0300001D
177 #  if 0                         /* Because it clashes with KRB5, is never
178                                  * used any more, and is safe to remove
179                                  * according to David Hopwood
180                                  * <david.hopwood@zetnet.co.uk> of the
181                                  * ietf-tls list */
182 #   define SSL3_CK_FZA_DMS_RC4_SHA                 0x0300001E
183 #  endif
184 # endif
185 
186 /*
187  * VRS Additional Kerberos5 entries
188  */
189 # define SSL3_CK_KRB5_DES_64_CBC_SHA             0x0300001E
190 # define SSL3_CK_KRB5_DES_192_CBC3_SHA           0x0300001F
191 # define SSL3_CK_KRB5_RC4_128_SHA                0x03000020
192 # define SSL3_CK_KRB5_IDEA_128_CBC_SHA           0x03000021
193 # define SSL3_CK_KRB5_DES_64_CBC_MD5             0x03000022
194 # define SSL3_CK_KRB5_DES_192_CBC3_MD5           0x03000023
195 # define SSL3_CK_KRB5_RC4_128_MD5                0x03000024
196 # define SSL3_CK_KRB5_IDEA_128_CBC_MD5           0x03000025
197 
198 # define SSL3_CK_KRB5_DES_40_CBC_SHA             0x03000026
199 # define SSL3_CK_KRB5_RC2_40_CBC_SHA             0x03000027
200 # define SSL3_CK_KRB5_RC4_40_SHA                 0x03000028
201 # define SSL3_CK_KRB5_DES_40_CBC_MD5             0x03000029
202 # define SSL3_CK_KRB5_RC2_40_CBC_MD5             0x0300002A
203 # define SSL3_CK_KRB5_RC4_40_MD5                 0x0300002B
204 
205 # define SSL3_TXT_RSA_NULL_MD5                   "NULL-MD5"
206 # define SSL3_TXT_RSA_NULL_SHA                   "NULL-SHA"
207 # define SSL3_TXT_RSA_RC4_40_MD5                 "EXP-RC4-MD5"
208 # define SSL3_TXT_RSA_RC4_128_MD5                "RC4-MD5"
209 # define SSL3_TXT_RSA_RC4_128_SHA                "RC4-SHA"
210 # define SSL3_TXT_RSA_RC2_40_MD5                 "EXP-RC2-CBC-MD5"
211 # define SSL3_TXT_RSA_IDEA_128_SHA               "IDEA-CBC-SHA"
212 # define SSL3_TXT_RSA_DES_40_CBC_SHA             "EXP-DES-CBC-SHA"
213 # define SSL3_TXT_RSA_DES_64_CBC_SHA             "DES-CBC-SHA"
214 # define SSL3_TXT_RSA_DES_192_CBC3_SHA           "DES-CBC3-SHA"
215 
216 # define SSL3_TXT_DH_DSS_DES_40_CBC_SHA          "EXP-DH-DSS-DES-CBC-SHA"
217 # define SSL3_TXT_DH_DSS_DES_64_CBC_SHA          "DH-DSS-DES-CBC-SHA"
218 # define SSL3_TXT_DH_DSS_DES_192_CBC3_SHA        "DH-DSS-DES-CBC3-SHA"
219 # define SSL3_TXT_DH_RSA_DES_40_CBC_SHA          "EXP-DH-RSA-DES-CBC-SHA"
220 # define SSL3_TXT_DH_RSA_DES_64_CBC_SHA          "DH-RSA-DES-CBC-SHA"
221 # define SSL3_TXT_DH_RSA_DES_192_CBC3_SHA        "DH-RSA-DES-CBC3-SHA"
222 
223 # define SSL3_TXT_EDH_DSS_DES_40_CBC_SHA         "EXP-EDH-DSS-DES-CBC-SHA"
224 # define SSL3_TXT_EDH_DSS_DES_64_CBC_SHA         "EDH-DSS-DES-CBC-SHA"
225 # define SSL3_TXT_EDH_DSS_DES_192_CBC3_SHA       "EDH-DSS-DES-CBC3-SHA"
226 # define SSL3_TXT_EDH_RSA_DES_40_CBC_SHA         "EXP-EDH-RSA-DES-CBC-SHA"
227 # define SSL3_TXT_EDH_RSA_DES_64_CBC_SHA         "EDH-RSA-DES-CBC-SHA"
228 # define SSL3_TXT_EDH_RSA_DES_192_CBC3_SHA       "EDH-RSA-DES-CBC3-SHA"
229 
230 # define SSL3_TXT_ADH_RC4_40_MD5                 "EXP-ADH-RC4-MD5"
231 # define SSL3_TXT_ADH_RC4_128_MD5                "ADH-RC4-MD5"
232 # define SSL3_TXT_ADH_DES_40_CBC_SHA             "EXP-ADH-DES-CBC-SHA"
233 # define SSL3_TXT_ADH_DES_64_CBC_SHA             "ADH-DES-CBC-SHA"
234 # define SSL3_TXT_ADH_DES_192_CBC_SHA            "ADH-DES-CBC3-SHA"
235 
236 # if 0
237 #  define SSL3_TXT_FZA_DMS_NULL_SHA               "FZA-NULL-SHA"
238 #  define SSL3_TXT_FZA_DMS_FZA_SHA                "FZA-FZA-CBC-SHA"
239 #  define SSL3_TXT_FZA_DMS_RC4_SHA                "FZA-RC4-SHA"
240 # endif
241 
242 # define SSL3_TXT_KRB5_DES_64_CBC_SHA            "KRB5-DES-CBC-SHA"
243 # define SSL3_TXT_KRB5_DES_192_CBC3_SHA          "KRB5-DES-CBC3-SHA"
244 # define SSL3_TXT_KRB5_RC4_128_SHA               "KRB5-RC4-SHA"
245 # define SSL3_TXT_KRB5_IDEA_128_CBC_SHA          "KRB5-IDEA-CBC-SHA"
246 # define SSL3_TXT_KRB5_DES_64_CBC_MD5            "KRB5-DES-CBC-MD5"
247 # define SSL3_TXT_KRB5_DES_192_CBC3_MD5          "KRB5-DES-CBC3-MD5"
248 # define SSL3_TXT_KRB5_RC4_128_MD5               "KRB5-RC4-MD5"
249 # define SSL3_TXT_KRB5_IDEA_128_CBC_MD5          "KRB5-IDEA-CBC-MD5"
250 
251 # define SSL3_TXT_KRB5_DES_40_CBC_SHA            "EXP-KRB5-DES-CBC-SHA"
252 # define SSL3_TXT_KRB5_RC2_40_CBC_SHA            "EXP-KRB5-RC2-CBC-SHA"
253 # define SSL3_TXT_KRB5_RC4_40_SHA                "EXP-KRB5-RC4-SHA"
254 # define SSL3_TXT_KRB5_DES_40_CBC_MD5            "EXP-KRB5-DES-CBC-MD5"
255 # define SSL3_TXT_KRB5_RC2_40_CBC_MD5            "EXP-KRB5-RC2-CBC-MD5"
256 # define SSL3_TXT_KRB5_RC4_40_MD5                "EXP-KRB5-RC4-MD5"
257 
258 # define SSL3_SSL_SESSION_ID_LENGTH              32
259 # define SSL3_MAX_SSL_SESSION_ID_LENGTH          32
260 
261 # define SSL3_MASTER_SECRET_SIZE                 48
262 # define SSL3_RANDOM_SIZE                        32
263 # define SSL3_SESSION_ID_SIZE                    32
264 # define SSL3_RT_HEADER_LENGTH                   5
265 
266 # ifndef SSL3_ALIGN_PAYLOAD
267  /*
268   * Some will argue that this increases memory footprint, but it's not
269   * actually true. Point is that malloc has to return at least 64-bit aligned
270   * pointers, meaning that allocating 5 bytes wastes 3 bytes in either case.
271   * Suggested pre-gaping simply moves these wasted bytes from the end of
272   * allocated region to its front, but makes data payload aligned, which
273   * improves performance:-)
274   */
275 #  define SSL3_ALIGN_PAYLOAD                     8
276 # else
277 #  if (SSL3_ALIGN_PAYLOAD&(SSL3_ALIGN_PAYLOAD-1))!=0
278 #   error "insane SSL3_ALIGN_PAYLOAD"
279 #   undef SSL3_ALIGN_PAYLOAD
280 #  endif
281 # endif
282 
283 /*
284  * This is the maximum MAC (digest) size used by the SSL library. Currently
285  * maximum of 20 is used by SHA1, but we reserve for future extension for
286  * 512-bit hashes.
287  */
288 
289 # define SSL3_RT_MAX_MD_SIZE                     64
290 
291 /*
292  * Maximum block size used in all ciphersuites. Currently 16 for AES.
293  */
294 
295 # define SSL_RT_MAX_CIPHER_BLOCK_SIZE            16
296 
297 # define SSL3_RT_MAX_EXTRA                       (16384)
298 
299 /* Maximum plaintext length: defined by SSL/TLS standards */
300 # define SSL3_RT_MAX_PLAIN_LENGTH                16384
301 /* Maximum compression overhead: defined by SSL/TLS standards */
302 # define SSL3_RT_MAX_COMPRESSED_OVERHEAD         1024
303 
304 /*
305  * The standards give a maximum encryption overhead of 1024 bytes. In
306  * practice the value is lower than this. The overhead is the maximum number
307  * of padding bytes (256) plus the mac size.
308  */
309 # define SSL3_RT_MAX_ENCRYPTED_OVERHEAD  (256 + SSL3_RT_MAX_MD_SIZE)
310 
311 /*
312  * OpenSSL currently only uses a padding length of at most one block so the
313  * send overhead is smaller.
314  */
315 
316 # define SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD \
317                         (SSL_RT_MAX_CIPHER_BLOCK_SIZE + SSL3_RT_MAX_MD_SIZE)
318 
319 /* If compression isn't used don't include the compression overhead */
320 
321 # ifdef OPENSSL_NO_COMP
322 #  define SSL3_RT_MAX_COMPRESSED_LENGTH           SSL3_RT_MAX_PLAIN_LENGTH
323 # else
324 #  define SSL3_RT_MAX_COMPRESSED_LENGTH   \
325                 (SSL3_RT_MAX_PLAIN_LENGTH+SSL3_RT_MAX_COMPRESSED_OVERHEAD)
326 # endif
327 # define SSL3_RT_MAX_ENCRYPTED_LENGTH    \
328                 (SSL3_RT_MAX_ENCRYPTED_OVERHEAD+SSL3_RT_MAX_COMPRESSED_LENGTH)
329 # define SSL3_RT_MAX_PACKET_SIZE         \
330                 (SSL3_RT_MAX_ENCRYPTED_LENGTH+SSL3_RT_HEADER_LENGTH)
331 
332 # define SSL3_MD_CLIENT_FINISHED_CONST   "\x43\x4C\x4E\x54"
333 # define SSL3_MD_SERVER_FINISHED_CONST   "\x53\x52\x56\x52"
334 
335 # define SSL3_VERSION                    0x0300
336 # define SSL3_VERSION_MAJOR              0x03
337 # define SSL3_VERSION_MINOR              0x00
338 
339 # define SSL3_RT_CHANGE_CIPHER_SPEC      20
340 # define SSL3_RT_ALERT                   21
341 # define SSL3_RT_HANDSHAKE               22
342 # define SSL3_RT_APPLICATION_DATA        23
343 # define TLS1_RT_HEARTBEAT               24
344 
345 # define SSL3_AL_WARNING                 1
346 # define SSL3_AL_FATAL                   2
347 
348 # define SSL3_AD_CLOSE_NOTIFY             0
349 # define SSL3_AD_UNEXPECTED_MESSAGE      10/* fatal */
350 # define SSL3_AD_BAD_RECORD_MAC          20/* fatal */
351 # define SSL3_AD_DECOMPRESSION_FAILURE   30/* fatal */
352 # define SSL3_AD_HANDSHAKE_FAILURE       40/* fatal */
353 # define SSL3_AD_NO_CERTIFICATE          41
354 # define SSL3_AD_BAD_CERTIFICATE         42
355 # define SSL3_AD_UNSUPPORTED_CERTIFICATE 43
356 # define SSL3_AD_CERTIFICATE_REVOKED     44
357 # define SSL3_AD_CERTIFICATE_EXPIRED     45
358 # define SSL3_AD_CERTIFICATE_UNKNOWN     46
359 # define SSL3_AD_ILLEGAL_PARAMETER       47/* fatal */
360 
361 # define TLS1_HB_REQUEST         1
362 # define TLS1_HB_RESPONSE        2
363 
364 # ifndef OPENSSL_NO_SSL_INTERN
365 
366 typedef struct ssl3_record_st {
367     /* type of record */
368     /*
369      * r
370      */ int type;
371     /* How many bytes available */
372     /*
373      * rw
374      */ unsigned int length;
375     /* read/write offset into 'buf' */
376     /*
377      * r
378      */ unsigned int off;
379     /* pointer to the record data */
380     /*
381      * rw
382      */ unsigned char *data;
383     /* where the decode bytes are */
384     /*
385      * rw
386      */ unsigned char *input;
387     /* only used with decompression - malloc()ed */
388     /*
389      * r
390      */ unsigned char *comp;
391     /* epoch number, needed by DTLS1 */
392     /*
393      * r
394      */ unsigned long epoch;
395     /* sequence number, needed by DTLS1 */
396     /*
397      * r
398      */ unsigned char seq_num[8];
399 } SSL3_RECORD;
400 
401 typedef struct ssl3_buffer_st {
402     /* at least SSL3_RT_MAX_PACKET_SIZE bytes, see ssl3_setup_buffers() */
403     unsigned char *buf;
404     /* buffer size */
405     size_t len;
406     /* where to 'copy from' */
407     int offset;
408     /* how many bytes left */
409     int left;
410 } SSL3_BUFFER;
411 
412 # endif
413 
414 # define SSL3_CT_RSA_SIGN                        1
415 # define SSL3_CT_DSS_SIGN                        2
416 # define SSL3_CT_RSA_FIXED_DH                    3
417 # define SSL3_CT_DSS_FIXED_DH                    4
418 # define SSL3_CT_RSA_EPHEMERAL_DH                5
419 # define SSL3_CT_DSS_EPHEMERAL_DH                6
420 # define SSL3_CT_FORTEZZA_DMS                    20
421 /*
422  * SSL3_CT_NUMBER is used to size arrays and it must be large enough to
423  * contain all of the cert types defined either for SSLv3 and TLSv1.
424  */
425 # define SSL3_CT_NUMBER                  9
426 
427 # define SSL3_FLAGS_NO_RENEGOTIATE_CIPHERS       0x0001
428 # define SSL3_FLAGS_DELAY_CLIENT_FINISHED        0x0002
429 # define SSL3_FLAGS_POP_BUFFER                   0x0004
430 # define TLS1_FLAGS_TLS_PADDING_BUG              0x0008
431 # define TLS1_FLAGS_SKIP_CERT_VERIFY             0x0010
432 # define TLS1_FLAGS_KEEP_HANDSHAKE               0x0020
433 /*
434  * Set when the handshake is ready to process peer's ChangeCipherSpec message.
435  * Cleared after the message has been processed.
436  */
437 # define SSL3_FLAGS_CCS_OK                       0x0080
438 
439 /*
440  * SSL3_FLAGS_SGC_RESTART_DONE is set when we restart a handshake because of
441  * MS SGC and so prevents us from restarting the handshake in a loop. It's
442  * reset on a renegotiation, so effectively limits the client to one restart
443  * per negotiation. This limits the possibility of a DDoS attack where the
444  * client handshakes in a loop using SGC to restart. Servers which permit
445  * renegotiation can still be effected, but we can't prevent that.
446  */
447 # define SSL3_FLAGS_SGC_RESTART_DONE             0x0040
448 
449 # ifndef OPENSSL_NO_SSL_INTERN
450 
451 typedef struct ssl3_state_st {
452     long flags;
453     int delay_buf_pop_ret;
454     unsigned char read_sequence[8];
455     int read_mac_secret_size;
456     unsigned char read_mac_secret[EVP_MAX_MD_SIZE];
457     unsigned char write_sequence[8];
458     int write_mac_secret_size;
459     unsigned char write_mac_secret[EVP_MAX_MD_SIZE];
460     unsigned char server_random[SSL3_RANDOM_SIZE];
461     unsigned char client_random[SSL3_RANDOM_SIZE];
462     /* flags for countermeasure against known-IV weakness */
463     int need_empty_fragments;
464     int empty_fragment_done;
465     /* The value of 'extra' when the buffers were initialized */
466     int init_extra;
467     SSL3_BUFFER rbuf;           /* read IO goes into here */
468     SSL3_BUFFER wbuf;           /* write IO goes into here */
469     SSL3_RECORD rrec;           /* each decoded record goes in here */
470     SSL3_RECORD wrec;           /* goes out from here */
471     /*
472      * storage for Alert/Handshake protocol data received but not yet
473      * processed by ssl3_read_bytes:
474      */
475     unsigned char alert_fragment[2];
476     unsigned int alert_fragment_len;
477     unsigned char handshake_fragment[4];
478     unsigned int handshake_fragment_len;
479     /* partial write - check the numbers match */
480     unsigned int wnum;          /* number of bytes sent so far */
481     int wpend_tot;              /* number bytes written */
482     int wpend_type;
483     int wpend_ret;              /* number of bytes submitted */
484     const unsigned char *wpend_buf;
485     /* used during startup, digest all incoming/outgoing packets */
486     BIO *handshake_buffer;
487     /*
488      * When set of handshake digests is determined, buffer is hashed and
489      * freed and MD_CTX-es for all required digests are stored in this array
490      */
491     EVP_MD_CTX **handshake_dgst;
492     /*
493      * Set whenever an expected ChangeCipherSpec message is processed.
494      * Unset when the peer's Finished message is received.
495      * Unexpected ChangeCipherSpec messages trigger a fatal alert.
496      */
497     int change_cipher_spec;
498     int warn_alert;
499     int fatal_alert;
500     /*
501      * we allow one fatal and one warning alert to be outstanding, send close
502      * alert via the warning alert
503      */
504     int alert_dispatch;
505     unsigned char send_alert[2];
506     /*
507      * This flag is set when we should renegotiate ASAP, basically when there
508      * is no more data in the read or write buffers
509      */
510     int renegotiate;
511     int total_renegotiations;
512     int num_renegotiations;
513     int in_read_app_data;
514     /*
515      * Opaque PRF input as used for the current handshake. These fields are
516      * used only if TLSEXT_TYPE_opaque_prf_input is defined (otherwise, they
517      * are merely present to improve binary compatibility)
518      */
519     void *client_opaque_prf_input;
520     size_t client_opaque_prf_input_len;
521     void *server_opaque_prf_input;
522     size_t server_opaque_prf_input_len;
523     struct {
524         /* actually only needs to be 16+20 */
525         unsigned char cert_verify_md[EVP_MAX_MD_SIZE * 2];
526         /* actually only need to be 16+20 for SSLv3 and 12 for TLS */
527         unsigned char finish_md[EVP_MAX_MD_SIZE * 2];
528         int finish_md_len;
529         unsigned char peer_finish_md[EVP_MAX_MD_SIZE * 2];
530         int peer_finish_md_len;
531         unsigned long message_size;
532         int message_type;
533         /* used to hold the new cipher we are going to use */
534         const SSL_CIPHER *new_cipher;
535 #  ifndef OPENSSL_NO_DH
536         DH *dh;
537 #  endif
538 #  ifndef OPENSSL_NO_ECDH
539         EC_KEY *ecdh;           /* holds short lived ECDH key */
540 #  endif
541         /* used when SSL_ST_FLUSH_DATA is entered */
542         int next_state;
543         int reuse_message;
544         /* used for certificate requests */
545         int cert_req;
546         int ctype_num;
547         char ctype[SSL3_CT_NUMBER];
548         STACK_OF(X509_NAME) *ca_names;
549         int use_rsa_tmp;
550         int key_block_length;
551         unsigned char *key_block;
552         const EVP_CIPHER *new_sym_enc;
553         const EVP_MD *new_hash;
554         int new_mac_pkey_type;
555         int new_mac_secret_size;
556 #  ifndef OPENSSL_NO_COMP
557         const SSL_COMP *new_compression;
558 #  else
559         char *new_compression;
560 #  endif
561         int cert_request;
562     } tmp;
563 
564     /* Connection binding to prevent renegotiation attacks */
565     unsigned char previous_client_finished[EVP_MAX_MD_SIZE];
566     unsigned char previous_client_finished_len;
567     unsigned char previous_server_finished[EVP_MAX_MD_SIZE];
568     unsigned char previous_server_finished_len;
569     int send_connection_binding; /* TODOEKR */
570 
571 #  ifndef OPENSSL_NO_NEXTPROTONEG
572     /*
573      * Set if we saw the Next Protocol Negotiation extension from our peer.
574      */
575     int next_proto_neg_seen;
576 #  endif
577 
578 #  ifndef OPENSSL_NO_TLSEXT
579 #   ifndef OPENSSL_NO_EC
580     /*
581      * This is set to true if we believe that this is a version of Safari
582      * running on OS X 10.6 or newer. We wish to know this because Safari on
583      * 10.8 .. 10.8.3 has broken ECDHE-ECDSA support.
584      */
585     char is_probably_safari;
586 #   endif                       /* !OPENSSL_NO_EC */
587 #  endif                        /* !OPENSSL_NO_TLSEXT */
588 } SSL3_STATE;
589 
590 # endif
591 
592 /* SSLv3 */
593 /*
594  * client
595  */
596 /* extra state */
597 # define SSL3_ST_CW_FLUSH                (0x100|SSL_ST_CONNECT)
598 # ifndef OPENSSL_NO_SCTP
599 #  define DTLS1_SCTP_ST_CW_WRITE_SOCK                     (0x310|SSL_ST_CONNECT)
600 #  define DTLS1_SCTP_ST_CR_READ_SOCK                      (0x320|SSL_ST_CONNECT)
601 # endif
602 /* write to server */
603 # define SSL3_ST_CW_CLNT_HELLO_A         (0x110|SSL_ST_CONNECT)
604 # define SSL3_ST_CW_CLNT_HELLO_B         (0x111|SSL_ST_CONNECT)
605 /* read from server */
606 # define SSL3_ST_CR_SRVR_HELLO_A         (0x120|SSL_ST_CONNECT)
607 # define SSL3_ST_CR_SRVR_HELLO_B         (0x121|SSL_ST_CONNECT)
608 # define DTLS1_ST_CR_HELLO_VERIFY_REQUEST_A (0x126|SSL_ST_CONNECT)
609 # define DTLS1_ST_CR_HELLO_VERIFY_REQUEST_B (0x127|SSL_ST_CONNECT)
610 # define SSL3_ST_CR_CERT_A               (0x130|SSL_ST_CONNECT)
611 # define SSL3_ST_CR_CERT_B               (0x131|SSL_ST_CONNECT)
612 # define SSL3_ST_CR_KEY_EXCH_A           (0x140|SSL_ST_CONNECT)
613 # define SSL3_ST_CR_KEY_EXCH_B           (0x141|SSL_ST_CONNECT)
614 # define SSL3_ST_CR_CERT_REQ_A           (0x150|SSL_ST_CONNECT)
615 # define SSL3_ST_CR_CERT_REQ_B           (0x151|SSL_ST_CONNECT)
616 # define SSL3_ST_CR_SRVR_DONE_A          (0x160|SSL_ST_CONNECT)
617 # define SSL3_ST_CR_SRVR_DONE_B          (0x161|SSL_ST_CONNECT)
618 /* write to server */
619 # define SSL3_ST_CW_CERT_A               (0x170|SSL_ST_CONNECT)
620 # define SSL3_ST_CW_CERT_B               (0x171|SSL_ST_CONNECT)
621 # define SSL3_ST_CW_CERT_C               (0x172|SSL_ST_CONNECT)
622 # define SSL3_ST_CW_CERT_D               (0x173|SSL_ST_CONNECT)
623 # define SSL3_ST_CW_KEY_EXCH_A           (0x180|SSL_ST_CONNECT)
624 # define SSL3_ST_CW_KEY_EXCH_B           (0x181|SSL_ST_CONNECT)
625 # define SSL3_ST_CW_CERT_VRFY_A          (0x190|SSL_ST_CONNECT)
626 # define SSL3_ST_CW_CERT_VRFY_B          (0x191|SSL_ST_CONNECT)
627 # define SSL3_ST_CW_CHANGE_A             (0x1A0|SSL_ST_CONNECT)
628 # define SSL3_ST_CW_CHANGE_B             (0x1A1|SSL_ST_CONNECT)
629 # ifndef OPENSSL_NO_NEXTPROTONEG
630 #  define SSL3_ST_CW_NEXT_PROTO_A         (0x200|SSL_ST_CONNECT)
631 #  define SSL3_ST_CW_NEXT_PROTO_B         (0x201|SSL_ST_CONNECT)
632 # endif
633 # define SSL3_ST_CW_FINISHED_A           (0x1B0|SSL_ST_CONNECT)
634 # define SSL3_ST_CW_FINISHED_B           (0x1B1|SSL_ST_CONNECT)
635 /* read from server */
636 # define SSL3_ST_CR_CHANGE_A             (0x1C0|SSL_ST_CONNECT)
637 # define SSL3_ST_CR_CHANGE_B             (0x1C1|SSL_ST_CONNECT)
638 # define SSL3_ST_CR_FINISHED_A           (0x1D0|SSL_ST_CONNECT)
639 # define SSL3_ST_CR_FINISHED_B           (0x1D1|SSL_ST_CONNECT)
640 # define SSL3_ST_CR_SESSION_TICKET_A     (0x1E0|SSL_ST_CONNECT)
641 # define SSL3_ST_CR_SESSION_TICKET_B     (0x1E1|SSL_ST_CONNECT)
642 # define SSL3_ST_CR_CERT_STATUS_A        (0x1F0|SSL_ST_CONNECT)
643 # define SSL3_ST_CR_CERT_STATUS_B        (0x1F1|SSL_ST_CONNECT)
644 
645 /* server */
646 /* extra state */
647 # define SSL3_ST_SW_FLUSH                (0x100|SSL_ST_ACCEPT)
648 # ifndef OPENSSL_NO_SCTP
649 #  define DTLS1_SCTP_ST_SW_WRITE_SOCK                     (0x310|SSL_ST_ACCEPT)
650 #  define DTLS1_SCTP_ST_SR_READ_SOCK                      (0x320|SSL_ST_ACCEPT)
651 # endif
652 /* read from client */
653 /* Do not change the number values, they do matter */
654 # define SSL3_ST_SR_CLNT_HELLO_A         (0x110|SSL_ST_ACCEPT)
655 # define SSL3_ST_SR_CLNT_HELLO_B         (0x111|SSL_ST_ACCEPT)
656 # define SSL3_ST_SR_CLNT_HELLO_C         (0x112|SSL_ST_ACCEPT)
657 /* write to client */
658 # define DTLS1_ST_SW_HELLO_VERIFY_REQUEST_A (0x113|SSL_ST_ACCEPT)
659 # define DTLS1_ST_SW_HELLO_VERIFY_REQUEST_B (0x114|SSL_ST_ACCEPT)
660 # define SSL3_ST_SW_HELLO_REQ_A          (0x120|SSL_ST_ACCEPT)
661 # define SSL3_ST_SW_HELLO_REQ_B          (0x121|SSL_ST_ACCEPT)
662 # define SSL3_ST_SW_HELLO_REQ_C          (0x122|SSL_ST_ACCEPT)
663 # define SSL3_ST_SW_SRVR_HELLO_A         (0x130|SSL_ST_ACCEPT)
664 # define SSL3_ST_SW_SRVR_HELLO_B         (0x131|SSL_ST_ACCEPT)
665 # define SSL3_ST_SW_CERT_A               (0x140|SSL_ST_ACCEPT)
666 # define SSL3_ST_SW_CERT_B               (0x141|SSL_ST_ACCEPT)
667 # define SSL3_ST_SW_KEY_EXCH_A           (0x150|SSL_ST_ACCEPT)
668 # define SSL3_ST_SW_KEY_EXCH_B           (0x151|SSL_ST_ACCEPT)
669 # define SSL3_ST_SW_CERT_REQ_A           (0x160|SSL_ST_ACCEPT)
670 # define SSL3_ST_SW_CERT_REQ_B           (0x161|SSL_ST_ACCEPT)
671 # define SSL3_ST_SW_SRVR_DONE_A          (0x170|SSL_ST_ACCEPT)
672 # define SSL3_ST_SW_SRVR_DONE_B          (0x171|SSL_ST_ACCEPT)
673 /* read from client */
674 # define SSL3_ST_SR_CERT_A               (0x180|SSL_ST_ACCEPT)
675 # define SSL3_ST_SR_CERT_B               (0x181|SSL_ST_ACCEPT)
676 # define SSL3_ST_SR_KEY_EXCH_A           (0x190|SSL_ST_ACCEPT)
677 # define SSL3_ST_SR_KEY_EXCH_B           (0x191|SSL_ST_ACCEPT)
678 # define SSL3_ST_SR_CERT_VRFY_A          (0x1A0|SSL_ST_ACCEPT)
679 # define SSL3_ST_SR_CERT_VRFY_B          (0x1A1|SSL_ST_ACCEPT)
680 # define SSL3_ST_SR_CHANGE_A             (0x1B0|SSL_ST_ACCEPT)
681 # define SSL3_ST_SR_CHANGE_B             (0x1B1|SSL_ST_ACCEPT)
682 # ifndef OPENSSL_NO_NEXTPROTONEG
683 #  define SSL3_ST_SR_NEXT_PROTO_A         (0x210|SSL_ST_ACCEPT)
684 #  define SSL3_ST_SR_NEXT_PROTO_B         (0x211|SSL_ST_ACCEPT)
685 # endif
686 # define SSL3_ST_SR_FINISHED_A           (0x1C0|SSL_ST_ACCEPT)
687 # define SSL3_ST_SR_FINISHED_B           (0x1C1|SSL_ST_ACCEPT)
688 /* write to client */
689 # define SSL3_ST_SW_CHANGE_A             (0x1D0|SSL_ST_ACCEPT)
690 # define SSL3_ST_SW_CHANGE_B             (0x1D1|SSL_ST_ACCEPT)
691 # define SSL3_ST_SW_FINISHED_A           (0x1E0|SSL_ST_ACCEPT)
692 # define SSL3_ST_SW_FINISHED_B           (0x1E1|SSL_ST_ACCEPT)
693 # define SSL3_ST_SW_SESSION_TICKET_A     (0x1F0|SSL_ST_ACCEPT)
694 # define SSL3_ST_SW_SESSION_TICKET_B     (0x1F1|SSL_ST_ACCEPT)
695 # define SSL3_ST_SW_CERT_STATUS_A        (0x200|SSL_ST_ACCEPT)
696 # define SSL3_ST_SW_CERT_STATUS_B        (0x201|SSL_ST_ACCEPT)
697 
698 # define SSL3_MT_HELLO_REQUEST                   0
699 # define SSL3_MT_CLIENT_HELLO                    1
700 # define SSL3_MT_SERVER_HELLO                    2
701 # define SSL3_MT_NEWSESSION_TICKET               4
702 # define SSL3_MT_CERTIFICATE                     11
703 # define SSL3_MT_SERVER_KEY_EXCHANGE             12
704 # define SSL3_MT_CERTIFICATE_REQUEST             13
705 # define SSL3_MT_SERVER_DONE                     14
706 # define SSL3_MT_CERTIFICATE_VERIFY              15
707 # define SSL3_MT_CLIENT_KEY_EXCHANGE             16
708 # define SSL3_MT_FINISHED                        20
709 # define SSL3_MT_CERTIFICATE_STATUS              22
710 # ifndef OPENSSL_NO_NEXTPROTONEG
711 #  define SSL3_MT_NEXT_PROTO                      67
712 # endif
713 # define DTLS1_MT_HELLO_VERIFY_REQUEST    3
714 
715 # define SSL3_MT_CCS                             1
716 
717 /* These are used when changing over to a new cipher */
718 # define SSL3_CC_READ            0x01
719 # define SSL3_CC_WRITE           0x02
720 # define SSL3_CC_CLIENT          0x10
721 # define SSL3_CC_SERVER          0x20
722 # define SSL3_CHANGE_CIPHER_CLIENT_WRITE (SSL3_CC_CLIENT|SSL3_CC_WRITE)
723 # define SSL3_CHANGE_CIPHER_SERVER_READ  (SSL3_CC_SERVER|SSL3_CC_READ)
724 # define SSL3_CHANGE_CIPHER_CLIENT_READ  (SSL3_CC_CLIENT|SSL3_CC_READ)
725 # define SSL3_CHANGE_CIPHER_SERVER_WRITE (SSL3_CC_SERVER|SSL3_CC_WRITE)
726 
727 #ifdef  __cplusplus
728 }
729 #endif
730 #endif
731