2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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.
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).
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.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
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)"
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
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.]
58 /* ====================================================================
59 * Copyright (c) 1998-2002 The OpenSSL Project. All rights reserved.
61 * Redistribution and use in source and binary forms, with or without
62 * modification, are permitted provided that the following conditions
65 * 1. Redistributions of source code must retain the above copyright
66 * notice, this list of conditions and the following disclaimer.
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
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/)"
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.
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.
87 * 6. Redistributions of any form whatsoever must retain the following
89 * "This product includes software developed by the OpenSSL Project
90 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
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 * ====================================================================
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).
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.
117 #ifndef HEADER_SSL3_H
118 #define HEADER_SSL3_H
120 #ifndef OPENSSL_NO_COMP
121 #include <openssl/comp.h>
123 #include <openssl/buffer.h>
124 #include <openssl/evp.h>
125 #include <openssl/ssl.h>
131 /* Signalling cipher suite value: from draft-ietf-tls-renegotiation-03.txt */
132 #define SSL3_CK_SCSV 0x030000FF
134 #define SSL3_CK_RSA_NULL_MD5 0x03000001
135 #define SSL3_CK_RSA_NULL_SHA 0x03000002
136 #define SSL3_CK_RSA_RC4_40_MD5 0x03000003
137 #define SSL3_CK_RSA_RC4_128_MD5 0x03000004
138 #define SSL3_CK_RSA_RC4_128_SHA 0x03000005
139 #define SSL3_CK_RSA_RC2_40_MD5 0x03000006
140 #define SSL3_CK_RSA_IDEA_128_SHA 0x03000007
141 #define SSL3_CK_RSA_DES_40_CBC_SHA 0x03000008
142 #define SSL3_CK_RSA_DES_64_CBC_SHA 0x03000009
143 #define SSL3_CK_RSA_DES_192_CBC3_SHA 0x0300000A
145 #define SSL3_CK_DH_DSS_DES_40_CBC_SHA 0x0300000B
146 #define SSL3_CK_DH_DSS_DES_64_CBC_SHA 0x0300000C
147 #define SSL3_CK_DH_DSS_DES_192_CBC3_SHA 0x0300000D
148 #define SSL3_CK_DH_RSA_DES_40_CBC_SHA 0x0300000E
149 #define SSL3_CK_DH_RSA_DES_64_CBC_SHA 0x0300000F
150 #define SSL3_CK_DH_RSA_DES_192_CBC3_SHA 0x03000010
152 #define SSL3_CK_EDH_DSS_DES_40_CBC_SHA 0x03000011
153 #define SSL3_CK_EDH_DSS_DES_64_CBC_SHA 0x03000012
154 #define SSL3_CK_EDH_DSS_DES_192_CBC3_SHA 0x03000013
155 #define SSL3_CK_EDH_RSA_DES_40_CBC_SHA 0x03000014
156 #define SSL3_CK_EDH_RSA_DES_64_CBC_SHA 0x03000015
157 #define SSL3_CK_EDH_RSA_DES_192_CBC3_SHA 0x03000016
159 #define SSL3_CK_ADH_RC4_40_MD5 0x03000017
160 #define SSL3_CK_ADH_RC4_128_MD5 0x03000018
161 #define SSL3_CK_ADH_DES_40_CBC_SHA 0x03000019
162 #define SSL3_CK_ADH_DES_64_CBC_SHA 0x0300001A
163 #define SSL3_CK_ADH_DES_192_CBC_SHA 0x0300001B
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
175 /* VRS Additional Kerberos5 entries
177 #define SSL3_CK_KRB5_DES_64_CBC_SHA 0x0300001E
178 #define SSL3_CK_KRB5_DES_192_CBC3_SHA 0x0300001F
179 #define SSL3_CK_KRB5_RC4_128_SHA 0x03000020
180 #define SSL3_CK_KRB5_IDEA_128_CBC_SHA 0x03000021
181 #define SSL3_CK_KRB5_DES_64_CBC_MD5 0x03000022
182 #define SSL3_CK_KRB5_DES_192_CBC3_MD5 0x03000023
183 #define SSL3_CK_KRB5_RC4_128_MD5 0x03000024
184 #define SSL3_CK_KRB5_IDEA_128_CBC_MD5 0x03000025
186 #define SSL3_CK_KRB5_DES_40_CBC_SHA 0x03000026
187 #define SSL3_CK_KRB5_RC2_40_CBC_SHA 0x03000027
188 #define SSL3_CK_KRB5_RC4_40_SHA 0x03000028
189 #define SSL3_CK_KRB5_DES_40_CBC_MD5 0x03000029
190 #define SSL3_CK_KRB5_RC2_40_CBC_MD5 0x0300002A
191 #define SSL3_CK_KRB5_RC4_40_MD5 0x0300002B
193 #define SSL3_TXT_RSA_NULL_MD5 "NULL-MD5"
194 #define SSL3_TXT_RSA_NULL_SHA "NULL-SHA"
195 #define SSL3_TXT_RSA_RC4_40_MD5 "EXP-RC4-MD5"
196 #define SSL3_TXT_RSA_RC4_128_MD5 "RC4-MD5"
197 #define SSL3_TXT_RSA_RC4_128_SHA "RC4-SHA"
198 #define SSL3_TXT_RSA_RC2_40_MD5 "EXP-RC2-CBC-MD5"
199 #define SSL3_TXT_RSA_IDEA_128_SHA "IDEA-CBC-SHA"
200 #define SSL3_TXT_RSA_DES_40_CBC_SHA "EXP-DES-CBC-SHA"
201 #define SSL3_TXT_RSA_DES_64_CBC_SHA "DES-CBC-SHA"
202 #define SSL3_TXT_RSA_DES_192_CBC3_SHA "DES-CBC3-SHA"
204 #define SSL3_TXT_DH_DSS_DES_40_CBC_SHA "EXP-DH-DSS-DES-CBC-SHA"
205 #define SSL3_TXT_DH_DSS_DES_64_CBC_SHA "DH-DSS-DES-CBC-SHA"
206 #define SSL3_TXT_DH_DSS_DES_192_CBC3_SHA "DH-DSS-DES-CBC3-SHA"
207 #define SSL3_TXT_DH_RSA_DES_40_CBC_SHA "EXP-DH-RSA-DES-CBC-SHA"
208 #define SSL3_TXT_DH_RSA_DES_64_CBC_SHA "DH-RSA-DES-CBC-SHA"
209 #define SSL3_TXT_DH_RSA_DES_192_CBC3_SHA "DH-RSA-DES-CBC3-SHA"
211 #define SSL3_TXT_EDH_DSS_DES_40_CBC_SHA "EXP-EDH-DSS-DES-CBC-SHA"
212 #define SSL3_TXT_EDH_DSS_DES_64_CBC_SHA "EDH-DSS-DES-CBC-SHA"
213 #define SSL3_TXT_EDH_DSS_DES_192_CBC3_SHA "EDH-DSS-DES-CBC3-SHA"
214 #define SSL3_TXT_EDH_RSA_DES_40_CBC_SHA "EXP-EDH-RSA-DES-CBC-SHA"
215 #define SSL3_TXT_EDH_RSA_DES_64_CBC_SHA "EDH-RSA-DES-CBC-SHA"
216 #define SSL3_TXT_EDH_RSA_DES_192_CBC3_SHA "EDH-RSA-DES-CBC3-SHA"
218 #define SSL3_TXT_ADH_RC4_40_MD5 "EXP-ADH-RC4-MD5"
219 #define SSL3_TXT_ADH_RC4_128_MD5 "ADH-RC4-MD5"
220 #define SSL3_TXT_ADH_DES_40_CBC_SHA "EXP-ADH-DES-CBC-SHA"
221 #define SSL3_TXT_ADH_DES_64_CBC_SHA "ADH-DES-CBC-SHA"
222 #define SSL3_TXT_ADH_DES_192_CBC_SHA "ADH-DES-CBC3-SHA"
225 #define SSL3_TXT_FZA_DMS_NULL_SHA "FZA-NULL-SHA"
226 #define SSL3_TXT_FZA_DMS_FZA_SHA "FZA-FZA-CBC-SHA"
227 #define SSL3_TXT_FZA_DMS_RC4_SHA "FZA-RC4-SHA"
230 #define SSL3_TXT_KRB5_DES_64_CBC_SHA "KRB5-DES-CBC-SHA"
231 #define SSL3_TXT_KRB5_DES_192_CBC3_SHA "KRB5-DES-CBC3-SHA"
232 #define SSL3_TXT_KRB5_RC4_128_SHA "KRB5-RC4-SHA"
233 #define SSL3_TXT_KRB5_IDEA_128_CBC_SHA "KRB5-IDEA-CBC-SHA"
234 #define SSL3_TXT_KRB5_DES_64_CBC_MD5 "KRB5-DES-CBC-MD5"
235 #define SSL3_TXT_KRB5_DES_192_CBC3_MD5 "KRB5-DES-CBC3-MD5"
236 #define SSL3_TXT_KRB5_RC4_128_MD5 "KRB5-RC4-MD5"
237 #define SSL3_TXT_KRB5_IDEA_128_CBC_MD5 "KRB5-IDEA-CBC-MD5"
239 #define SSL3_TXT_KRB5_DES_40_CBC_SHA "EXP-KRB5-DES-CBC-SHA"
240 #define SSL3_TXT_KRB5_RC2_40_CBC_SHA "EXP-KRB5-RC2-CBC-SHA"
241 #define SSL3_TXT_KRB5_RC4_40_SHA "EXP-KRB5-RC4-SHA"
242 #define SSL3_TXT_KRB5_DES_40_CBC_MD5 "EXP-KRB5-DES-CBC-MD5"
243 #define SSL3_TXT_KRB5_RC2_40_CBC_MD5 "EXP-KRB5-RC2-CBC-MD5"
244 #define SSL3_TXT_KRB5_RC4_40_MD5 "EXP-KRB5-RC4-MD5"
246 #define SSL3_SSL_SESSION_ID_LENGTH 32
247 #define SSL3_MAX_SSL_SESSION_ID_LENGTH 32
249 #define SSL3_MASTER_SECRET_SIZE 48
250 #define SSL3_RANDOM_SIZE 32
251 #define SSL3_SESSION_ID_SIZE 32
252 #define SSL3_RT_HEADER_LENGTH 5
254 #define SSL3_HM_HEADER_LENGTH 4
256 #ifndef SSL3_ALIGN_PAYLOAD
257 /* Some will argue that this increases memory footprint, but it's
258 * not actually true. Point is that malloc has to return at least
259 * 64-bit aligned pointers, meaning that allocating 5 bytes wastes
260 * 3 bytes in either case. Suggested pre-gaping simply moves these
261 * wasted bytes from the end of allocated region to its front,
262 * but makes data payload aligned, which improves performance:-) */
263 # define SSL3_ALIGN_PAYLOAD 8
265 # if (SSL3_ALIGN_PAYLOAD&(SSL3_ALIGN_PAYLOAD-1))!=0
266 # error "insane SSL3_ALIGN_PAYLOAD"
267 # undef SSL3_ALIGN_PAYLOAD
271 /* This is the maximum MAC (digest) size used by the SSL library.
272 * Currently maximum of 20 is used by SHA1, but we reserve for
273 * future extension for 512-bit hashes.
276 #define SSL3_RT_MAX_MD_SIZE 64
278 /* Maximum block size used in all ciphersuites. Currently 16 for AES.
281 #define SSL_RT_MAX_CIPHER_BLOCK_SIZE 16
283 #define SSL3_RT_MAX_EXTRA (16384)
285 /* Maximum plaintext length: defined by SSL/TLS standards */
286 #define SSL3_RT_MAX_PLAIN_LENGTH 16384
287 /* Maximum compression overhead: defined by SSL/TLS standards */
288 #define SSL3_RT_MAX_COMPRESSED_OVERHEAD 1024
290 /* The standards give a maximum encryption overhead of 1024 bytes.
291 * In practice the value is lower than this. The overhead is the maximum
292 * number of padding bytes (256) plus the mac size.
294 #define SSL3_RT_MAX_ENCRYPTED_OVERHEAD (256 + SSL3_RT_MAX_MD_SIZE)
296 /* OpenSSL currently only uses a padding length of at most one block so
297 * the send overhead is smaller.
300 #define SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD \
301 (SSL_RT_MAX_CIPHER_BLOCK_SIZE + SSL3_RT_MAX_MD_SIZE)
303 /* If compression isn't used don't include the compression overhead */
305 #ifdef OPENSSL_NO_COMP
306 #define SSL3_RT_MAX_COMPRESSED_LENGTH SSL3_RT_MAX_PLAIN_LENGTH
308 #define SSL3_RT_MAX_COMPRESSED_LENGTH \
309 (SSL3_RT_MAX_PLAIN_LENGTH+SSL3_RT_MAX_COMPRESSED_OVERHEAD)
311 #define SSL3_RT_MAX_ENCRYPTED_LENGTH \
312 (SSL3_RT_MAX_ENCRYPTED_OVERHEAD+SSL3_RT_MAX_COMPRESSED_LENGTH)
313 #define SSL3_RT_MAX_PACKET_SIZE \
314 (SSL3_RT_MAX_ENCRYPTED_LENGTH+SSL3_RT_HEADER_LENGTH)
316 #define SSL3_MD_CLIENT_FINISHED_CONST "\x43\x4C\x4E\x54"
317 #define SSL3_MD_SERVER_FINISHED_CONST "\x53\x52\x56\x52"
319 #define SSL3_VERSION 0x0300
320 #define SSL3_VERSION_MAJOR 0x03
321 #define SSL3_VERSION_MINOR 0x00
323 #define SSL3_RT_CHANGE_CIPHER_SPEC 20
324 #define SSL3_RT_ALERT 21
325 #define SSL3_RT_HANDSHAKE 22
326 #define SSL3_RT_APPLICATION_DATA 23
327 #define TLS1_RT_HEARTBEAT 24
329 /* Pseudo content types to indicate additional parameters */
330 #define TLS1_RT_CRYPTO 0x1000
331 #define TLS1_RT_CRYPTO_PREMASTER (TLS1_RT_CRYPTO | 0x1)
332 #define TLS1_RT_CRYPTO_CLIENT_RANDOM (TLS1_RT_CRYPTO | 0x2)
333 #define TLS1_RT_CRYPTO_SERVER_RANDOM (TLS1_RT_CRYPTO | 0x3)
334 #define TLS1_RT_CRYPTO_MASTER (TLS1_RT_CRYPTO | 0x4)
336 #define TLS1_RT_CRYPTO_READ 0x0000
337 #define TLS1_RT_CRYPTO_WRITE 0x0100
338 #define TLS1_RT_CRYPTO_MAC (TLS1_RT_CRYPTO | 0x5)
339 #define TLS1_RT_CRYPTO_KEY (TLS1_RT_CRYPTO | 0x6)
340 #define TLS1_RT_CRYPTO_IV (TLS1_RT_CRYPTO | 0x7)
341 #define TLS1_RT_CRYPTO_FIXED_IV (TLS1_RT_CRYPTO | 0x8)
343 /* Pseudo content type for SSL/TLS header info */
344 #define SSL3_RT_HEADER 0x100
346 #define SSL3_AL_WARNING 1
347 #define SSL3_AL_FATAL 2
349 #define SSL3_AD_CLOSE_NOTIFY 0
350 #define SSL3_AD_UNEXPECTED_MESSAGE 10 /* fatal */
351 #define SSL3_AD_BAD_RECORD_MAC 20 /* fatal */
352 #define SSL3_AD_DECOMPRESSION_FAILURE 30 /* fatal */
353 #define SSL3_AD_HANDSHAKE_FAILURE 40 /* fatal */
354 #define SSL3_AD_NO_CERTIFICATE 41
355 #define SSL3_AD_BAD_CERTIFICATE 42
356 #define SSL3_AD_UNSUPPORTED_CERTIFICATE 43
357 #define SSL3_AD_CERTIFICATE_REVOKED 44
358 #define SSL3_AD_CERTIFICATE_EXPIRED 45
359 #define SSL3_AD_CERTIFICATE_UNKNOWN 46
360 #define SSL3_AD_ILLEGAL_PARAMETER 47 /* fatal */
362 #define TLS1_HB_REQUEST 1
363 #define TLS1_HB_RESPONSE 2
365 #ifndef OPENSSL_NO_SSL_INTERN
367 typedef struct ssl3_record_st
369 /*r */ int type; /* type of record */
370 /*rw*/ unsigned int length; /* How many bytes available */
371 /*rw*/ unsigned int orig_len; /* How many bytes were available before padding
372 was removed? This is used to implement the
373 MAC check in constant time for CBC records.
375 /*r */ unsigned int off; /* read/write offset into 'buf' */
376 /*rw*/ unsigned char *data; /* pointer to the record data */
377 /*rw*/ unsigned char *input; /* where the decode bytes are */
378 /*r */ unsigned char *comp; /* only used with decompression - malloc()ed */
379 /*r */ unsigned long epoch; /* epoch number, needed by DTLS1 */
380 /*r */ unsigned char seq_num[8]; /* sequence number, needed by DTLS1 */
383 typedef struct ssl3_buffer_st
385 unsigned char *buf; /* at least SSL3_RT_MAX_PACKET_SIZE bytes,
386 * see ssl3_setup_buffers() */
387 size_t len; /* buffer size */
388 int offset; /* where to 'copy from' */
389 int left; /* how many bytes left */
394 #define SSL3_CT_RSA_SIGN 1
395 #define SSL3_CT_DSS_SIGN 2
396 #define SSL3_CT_RSA_FIXED_DH 3
397 #define SSL3_CT_DSS_FIXED_DH 4
398 #define SSL3_CT_RSA_EPHEMERAL_DH 5
399 #define SSL3_CT_DSS_EPHEMERAL_DH 6
400 #define SSL3_CT_FORTEZZA_DMS 20
401 /* SSL3_CT_NUMBER is used to size arrays and it must be large
402 * enough to contain all of the cert types defined either for
405 #define SSL3_CT_NUMBER 9
408 #define SSL3_FLAGS_NO_RENEGOTIATE_CIPHERS 0x0001
409 #define SSL3_FLAGS_DELAY_CLIENT_FINISHED 0x0002
410 #define SSL3_FLAGS_POP_BUFFER 0x0004
411 #define TLS1_FLAGS_TLS_PADDING_BUG 0x0008
412 #define TLS1_FLAGS_SKIP_CERT_VERIFY 0x0010
413 #define TLS1_FLAGS_KEEP_HANDSHAKE 0x0020
415 /* SSL3_FLAGS_SGC_RESTART_DONE is set when we
416 * restart a handshake because of MS SGC and so prevents us
417 * from restarting the handshake in a loop. It's reset on a
418 * renegotiation, so effectively limits the client to one restart
419 * per negotiation. This limits the possibility of a DDoS
420 * attack where the client handshakes in a loop using SGC to
421 * restart. Servers which permit renegotiation can still be
422 * effected, but we can't prevent that.
424 #define SSL3_FLAGS_SGC_RESTART_DONE 0x0040
426 #ifndef OPENSSL_NO_SSL_INTERN
428 typedef struct ssl3_state_st
431 int delay_buf_pop_ret;
433 unsigned char read_sequence[8];
434 int read_mac_secret_size;
435 unsigned char read_mac_secret[EVP_MAX_MD_SIZE];
436 unsigned char write_sequence[8];
437 int write_mac_secret_size;
438 unsigned char write_mac_secret[EVP_MAX_MD_SIZE];
440 unsigned char server_random[SSL3_RANDOM_SIZE];
441 unsigned char client_random[SSL3_RANDOM_SIZE];
443 /* flags for countermeasure against known-IV weakness */
444 int need_empty_fragments;
445 int empty_fragment_done;
447 /* The value of 'extra' when the buffers were initialized */
450 SSL3_BUFFER rbuf; /* read IO goes into here */
451 SSL3_BUFFER wbuf; /* write IO goes into here */
453 SSL3_RECORD rrec; /* each decoded record goes in here */
454 SSL3_RECORD wrec; /* goes out from here */
456 /* storage for Alert/Handshake protocol data received but not
457 * yet processed by ssl3_read_bytes: */
458 unsigned char alert_fragment[2];
459 unsigned int alert_fragment_len;
460 unsigned char handshake_fragment[4];
461 unsigned int handshake_fragment_len;
463 /* partial write - check the numbers match */
464 unsigned int wnum; /* number of bytes sent so far */
465 int wpend_tot; /* number bytes written */
467 int wpend_ret; /* number of bytes submitted */
468 const unsigned char *wpend_buf;
470 /* used during startup, digest all incoming/outgoing packets */
471 BIO *handshake_buffer;
472 /* When set of handshake digests is determined, buffer is hashed
473 * and freed and MD_CTX-es for all required digests are stored in
475 EVP_MD_CTX **handshake_dgst;
476 /* this is set whenerver we see a change_cipher_spec message
477 * come in when we are not looking for one */
478 int change_cipher_spec;
482 /* we allow one fatal and one warning alert to be outstanding,
483 * send close alert via the warning alert */
485 unsigned char send_alert[2];
487 /* This flag is set when we should renegotiate ASAP, basically when
488 * there is no more data in the read or write buffers */
490 int total_renegotiations;
491 int num_renegotiations;
493 int in_read_app_data;
495 /* Opaque PRF input as used for the current handshake.
496 * These fields are used only if TLSEXT_TYPE_opaque_prf_input is defined
497 * (otherwise, they are merely present to improve binary compatibility) */
498 void *client_opaque_prf_input;
499 size_t client_opaque_prf_input_len;
500 void *server_opaque_prf_input;
501 size_t server_opaque_prf_input_len;
504 /* actually only needs to be 16+20 */
505 unsigned char cert_verify_md[EVP_MAX_MD_SIZE*2];
507 /* actually only need to be 16+20 for SSLv3 and 12 for TLS */
508 unsigned char finish_md[EVP_MAX_MD_SIZE*2];
510 unsigned char peer_finish_md[EVP_MAX_MD_SIZE*2];
511 int peer_finish_md_len;
513 unsigned long message_size;
516 /* used to hold the new cipher we are going to use */
517 const SSL_CIPHER *new_cipher;
518 #ifndef OPENSSL_NO_DH
522 #ifndef OPENSSL_NO_ECDH
523 EC_KEY *ecdh; /* holds short lived ECDH key */
526 /* used when SSL_ST_FLUSH_DATA is entered */
531 /* used for certificate requests */
534 char ctype[SSL3_CT_NUMBER];
535 STACK_OF(X509_NAME) *ca_names;
539 int key_block_length;
540 unsigned char *key_block;
542 const EVP_CIPHER *new_sym_enc;
543 const EVP_MD *new_hash;
544 int new_mac_pkey_type;
545 int new_mac_secret_size;
546 #ifndef OPENSSL_NO_COMP
547 const SSL_COMP *new_compression;
549 char *new_compression;
554 /* Connection binding to prevent renegotiation attacks */
555 unsigned char previous_client_finished[EVP_MAX_MD_SIZE];
556 unsigned char previous_client_finished_len;
557 unsigned char previous_server_finished[EVP_MAX_MD_SIZE];
558 unsigned char previous_server_finished_len;
559 int send_connection_binding; /* TODOEKR */
561 #ifndef OPENSSL_NO_NEXTPROTONEG
562 /* Set if we saw the Next Protocol Negotiation extension from our peer. */
563 int next_proto_neg_seen;
566 #ifndef OPENSSL_NO_TLSEXT
567 /* tlsext_authz_client_types contains an array of supported authz
568 * types, as advertised by the client. The array is sorted and
569 * does not contain any duplicates. */
570 unsigned char *tlsext_authz_client_types;
571 size_t tlsext_authz_client_types_len;
572 /* tlsext_authz_promised_to_client is true iff we're a server and we
573 * echoed the client's supplemental data extension and therefore must
574 * send a supplemental data handshake message. */
575 char tlsext_authz_promised_to_client;
576 /* tlsext_authz_server_promised is true iff we're a client and the
577 * server echoed our server_authz extension and therefore must send us
578 * a supplemental data handshake message. */
579 char tlsext_authz_server_promised;
581 /* tlsext_custom_types contains an array of TLS Extension types which
582 * were advertised by the client in its ClientHello, which were not
583 * otherwise handled by OpenSSL, and which the server has registered
584 * a custom_srv_ext_record to handle.
585 * The array does not contain any duplicates, and is in the same order
586 * as the types were received in the client hello. */
587 unsigned short *tlsext_custom_types;
588 size_t tlsext_custom_types_count; /* how many tlsext_custom_types */
591 * (we are in the process of transitioning from NPN to ALPN.) */
593 /* In a server these point to the selected ALPN protocol after the
594 * ClientHello has been processed. In a client these contain the
595 * protocol that the server selected once the ServerHello has been
597 unsigned char *alpn_selected;
598 unsigned alpn_selected_len;
600 #ifndef OPENSSL_NO_EC
601 /* This is set to true if we believe that this is a version of Safari
602 * running on OS X 10.6 or newer. We wish to know this because Safari
603 * on 10.8 .. 10.8.3 has broken ECDHE-ECDSA support. */
604 char is_probably_safari;
605 #endif /* OPENSSL_NO_EC */
607 #endif /* OPENSSL_NO_TLSEXT */
615 #define SSL3_ST_CW_FLUSH (0x100|SSL_ST_CONNECT)
616 #ifndef OPENSSL_NO_SCTP
617 #define DTLS1_SCTP_ST_CW_WRITE_SOCK (0x310|SSL_ST_CONNECT)
618 #define DTLS1_SCTP_ST_CR_READ_SOCK (0x320|SSL_ST_CONNECT)
620 /* write to server */
621 #define SSL3_ST_CW_CLNT_HELLO_A (0x110|SSL_ST_CONNECT)
622 #define SSL3_ST_CW_CLNT_HELLO_B (0x111|SSL_ST_CONNECT)
623 /* read from server */
624 #define SSL3_ST_CR_SRVR_HELLO_A (0x120|SSL_ST_CONNECT)
625 #define SSL3_ST_CR_SRVR_HELLO_B (0x121|SSL_ST_CONNECT)
626 #define DTLS1_ST_CR_HELLO_VERIFY_REQUEST_A (0x126|SSL_ST_CONNECT)
627 #define DTLS1_ST_CR_HELLO_VERIFY_REQUEST_B (0x127|SSL_ST_CONNECT)
628 #define SSL3_ST_CR_CERT_A (0x130|SSL_ST_CONNECT)
629 #define SSL3_ST_CR_CERT_B (0x131|SSL_ST_CONNECT)
630 #define SSL3_ST_CR_KEY_EXCH_A (0x140|SSL_ST_CONNECT)
631 #define SSL3_ST_CR_KEY_EXCH_B (0x141|SSL_ST_CONNECT)
632 #define SSL3_ST_CR_CERT_REQ_A (0x150|SSL_ST_CONNECT)
633 #define SSL3_ST_CR_CERT_REQ_B (0x151|SSL_ST_CONNECT)
634 #define SSL3_ST_CR_SRVR_DONE_A (0x160|SSL_ST_CONNECT)
635 #define SSL3_ST_CR_SRVR_DONE_B (0x161|SSL_ST_CONNECT)
636 #define SSL3_ST_CR_SUPPLEMENTAL_DATA_A (0x210|SSL_ST_CONNECT)
637 #define SSL3_ST_CR_SUPPLEMENTAL_DATA_B (0x211|SSL_ST_CONNECT)
638 /* write to server */
639 #define SSL3_ST_CW_CERT_A (0x170|SSL_ST_CONNECT)
640 #define SSL3_ST_CW_CERT_B (0x171|SSL_ST_CONNECT)
641 #define SSL3_ST_CW_CERT_C (0x172|SSL_ST_CONNECT)
642 #define SSL3_ST_CW_CERT_D (0x173|SSL_ST_CONNECT)
643 #define SSL3_ST_CW_KEY_EXCH_A (0x180|SSL_ST_CONNECT)
644 #define SSL3_ST_CW_KEY_EXCH_B (0x181|SSL_ST_CONNECT)
645 #define SSL3_ST_CW_CERT_VRFY_A (0x190|SSL_ST_CONNECT)
646 #define SSL3_ST_CW_CERT_VRFY_B (0x191|SSL_ST_CONNECT)
647 #define SSL3_ST_CW_CHANGE_A (0x1A0|SSL_ST_CONNECT)
648 #define SSL3_ST_CW_CHANGE_B (0x1A1|SSL_ST_CONNECT)
649 #ifndef OPENSSL_NO_NEXTPROTONEG
650 #define SSL3_ST_CW_NEXT_PROTO_A (0x200|SSL_ST_CONNECT)
651 #define SSL3_ST_CW_NEXT_PROTO_B (0x201|SSL_ST_CONNECT)
653 #define SSL3_ST_CW_FINISHED_A (0x1B0|SSL_ST_CONNECT)
654 #define SSL3_ST_CW_FINISHED_B (0x1B1|SSL_ST_CONNECT)
655 /* read from server */
656 #define SSL3_ST_CR_CHANGE_A (0x1C0|SSL_ST_CONNECT)
657 #define SSL3_ST_CR_CHANGE_B (0x1C1|SSL_ST_CONNECT)
658 #define SSL3_ST_CR_FINISHED_A (0x1D0|SSL_ST_CONNECT)
659 #define SSL3_ST_CR_FINISHED_B (0x1D1|SSL_ST_CONNECT)
660 #define SSL3_ST_CR_SESSION_TICKET_A (0x1E0|SSL_ST_CONNECT)
661 #define SSL3_ST_CR_SESSION_TICKET_B (0x1E1|SSL_ST_CONNECT)
662 #define SSL3_ST_CR_CERT_STATUS_A (0x1F0|SSL_ST_CONNECT)
663 #define SSL3_ST_CR_CERT_STATUS_B (0x1F1|SSL_ST_CONNECT)
667 #define SSL3_ST_SW_FLUSH (0x100|SSL_ST_ACCEPT)
668 #ifndef OPENSSL_NO_SCTP
669 #define DTLS1_SCTP_ST_SW_WRITE_SOCK (0x310|SSL_ST_ACCEPT)
670 #define DTLS1_SCTP_ST_SR_READ_SOCK (0x320|SSL_ST_ACCEPT)
672 /* read from client */
673 /* Do not change the number values, they do matter */
674 #define SSL3_ST_SR_CLNT_HELLO_A (0x110|SSL_ST_ACCEPT)
675 #define SSL3_ST_SR_CLNT_HELLO_B (0x111|SSL_ST_ACCEPT)
676 #define SSL3_ST_SR_CLNT_HELLO_C (0x112|SSL_ST_ACCEPT)
677 /* write to client */
678 #define DTLS1_ST_SW_HELLO_VERIFY_REQUEST_A (0x113|SSL_ST_ACCEPT)
679 #define DTLS1_ST_SW_HELLO_VERIFY_REQUEST_B (0x114|SSL_ST_ACCEPT)
680 #define SSL3_ST_SW_HELLO_REQ_A (0x120|SSL_ST_ACCEPT)
681 #define SSL3_ST_SW_HELLO_REQ_B (0x121|SSL_ST_ACCEPT)
682 #define SSL3_ST_SW_HELLO_REQ_C (0x122|SSL_ST_ACCEPT)
683 #define SSL3_ST_SW_SRVR_HELLO_A (0x130|SSL_ST_ACCEPT)
684 #define SSL3_ST_SW_SRVR_HELLO_B (0x131|SSL_ST_ACCEPT)
685 #define SSL3_ST_SW_CERT_A (0x140|SSL_ST_ACCEPT)
686 #define SSL3_ST_SW_CERT_B (0x141|SSL_ST_ACCEPT)
687 #define SSL3_ST_SW_KEY_EXCH_A (0x150|SSL_ST_ACCEPT)
688 #define SSL3_ST_SW_KEY_EXCH_B (0x151|SSL_ST_ACCEPT)
689 #define SSL3_ST_SW_CERT_REQ_A (0x160|SSL_ST_ACCEPT)
690 #define SSL3_ST_SW_CERT_REQ_B (0x161|SSL_ST_ACCEPT)
691 #define SSL3_ST_SW_SRVR_DONE_A (0x170|SSL_ST_ACCEPT)
692 #define SSL3_ST_SW_SRVR_DONE_B (0x171|SSL_ST_ACCEPT)
693 /* read from client */
694 #define SSL3_ST_SR_CERT_A (0x180|SSL_ST_ACCEPT)
695 #define SSL3_ST_SR_CERT_B (0x181|SSL_ST_ACCEPT)
696 #define SSL3_ST_SR_KEY_EXCH_A (0x190|SSL_ST_ACCEPT)
697 #define SSL3_ST_SR_KEY_EXCH_B (0x191|SSL_ST_ACCEPT)
698 #define SSL3_ST_SR_CERT_VRFY_A (0x1A0|SSL_ST_ACCEPT)
699 #define SSL3_ST_SR_CERT_VRFY_B (0x1A1|SSL_ST_ACCEPT)
700 #define SSL3_ST_SR_CHANGE_A (0x1B0|SSL_ST_ACCEPT)
701 #define SSL3_ST_SR_CHANGE_B (0x1B1|SSL_ST_ACCEPT)
702 #ifndef OPENSSL_NO_NEXTPROTONEG
703 #define SSL3_ST_SR_NEXT_PROTO_A (0x210|SSL_ST_ACCEPT)
704 #define SSL3_ST_SR_NEXT_PROTO_B (0x211|SSL_ST_ACCEPT)
706 #define SSL3_ST_SR_FINISHED_A (0x1C0|SSL_ST_ACCEPT)
707 #define SSL3_ST_SR_FINISHED_B (0x1C1|SSL_ST_ACCEPT)
708 /* write to client */
709 #define SSL3_ST_SW_CHANGE_A (0x1D0|SSL_ST_ACCEPT)
710 #define SSL3_ST_SW_CHANGE_B (0x1D1|SSL_ST_ACCEPT)
711 #define SSL3_ST_SW_FINISHED_A (0x1E0|SSL_ST_ACCEPT)
712 #define SSL3_ST_SW_FINISHED_B (0x1E1|SSL_ST_ACCEPT)
713 #define SSL3_ST_SW_SESSION_TICKET_A (0x1F0|SSL_ST_ACCEPT)
714 #define SSL3_ST_SW_SESSION_TICKET_B (0x1F1|SSL_ST_ACCEPT)
715 #define SSL3_ST_SW_CERT_STATUS_A (0x200|SSL_ST_ACCEPT)
716 #define SSL3_ST_SW_CERT_STATUS_B (0x201|SSL_ST_ACCEPT)
717 #define SSL3_ST_SW_SUPPLEMENTAL_DATA_A (0x220|SSL_ST_ACCEPT)
718 #define SSL3_ST_SW_SUPPLEMENTAL_DATA_B (0x221|SSL_ST_ACCEPT)
720 #define SSL3_MT_HELLO_REQUEST 0
721 #define SSL3_MT_CLIENT_HELLO 1
722 #define SSL3_MT_SERVER_HELLO 2
723 #define SSL3_MT_NEWSESSION_TICKET 4
724 #define SSL3_MT_CERTIFICATE 11
725 #define SSL3_MT_SERVER_KEY_EXCHANGE 12
726 #define SSL3_MT_CERTIFICATE_REQUEST 13
727 #define SSL3_MT_SERVER_DONE 14
728 #define SSL3_MT_CERTIFICATE_VERIFY 15
729 #define SSL3_MT_CLIENT_KEY_EXCHANGE 16
730 #define SSL3_MT_FINISHED 20
731 #define SSL3_MT_CERTIFICATE_STATUS 22
732 #define SSL3_MT_SUPPLEMENTAL_DATA 23
733 #ifndef OPENSSL_NO_NEXTPROTONEG
734 #define SSL3_MT_NEXT_PROTO 67
736 #define DTLS1_MT_HELLO_VERIFY_REQUEST 3
739 #define SSL3_MT_CCS 1
741 /* These are used when changing over to a new cipher */
742 #define SSL3_CC_READ 0x01
743 #define SSL3_CC_WRITE 0x02
744 #define SSL3_CC_CLIENT 0x10
745 #define SSL3_CC_SERVER 0x20
746 #define SSL3_CHANGE_CIPHER_CLIENT_WRITE (SSL3_CC_CLIENT|SSL3_CC_WRITE)
747 #define SSL3_CHANGE_CIPHER_SERVER_READ (SSL3_CC_SERVER|SSL3_CC_READ)
748 #define SSL3_CHANGE_CIPHER_CLIENT_READ (SSL3_CC_CLIENT|SSL3_CC_READ)
749 #define SSL3_CHANGE_CIPHER_SERVER_WRITE (SSL3_CC_SERVER|SSL3_CC_WRITE)
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