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 #ifndef SSL3_ALIGN_PAYLOAD
255 /* Some will argue that this increases memory footprint, but it's
256 * not actually true. Point is that malloc has to return at least
257 * 64-bit aligned pointers, meaning that allocating 5 bytes wastes
258 * 3 bytes in either case. Suggested pre-gaping simply moves these
259 * wasted bytes from the end of allocated region to its front,
260 * but makes data payload aligned, which improves performance:-) */
261 # define SSL3_ALIGN_PAYLOAD 8
263 # if (SSL3_ALIGN_PAYLOAD&(SSL3_ALIGN_PAYLOAD-1))!=0
264 # error "insane SSL3_ALIGN_PAYLOAD"
265 # undef SSL3_ALIGN_PAYLOAD
269 /* This is the maximum MAC (digest) size used by the SSL library.
270 * Currently maximum of 20 is used by SHA1, but we reserve for
271 * future extension for 512-bit hashes.
274 #define SSL3_RT_MAX_MD_SIZE 64
276 /* Maximum block size used in all ciphersuites. Currently 16 for AES.
279 #define SSL_RT_MAX_CIPHER_BLOCK_SIZE 16
281 #define SSL3_RT_MAX_EXTRA (16384)
283 /* Maximum plaintext length: defined by SSL/TLS standards */
284 #define SSL3_RT_MAX_PLAIN_LENGTH 16384
285 /* Maximum compression overhead: defined by SSL/TLS standards */
286 #define SSL3_RT_MAX_COMPRESSED_OVERHEAD 1024
288 /* The standards give a maximum encryption overhead of 1024 bytes.
289 * In practice the value is lower than this. The overhead is the maximum
290 * number of padding bytes (256) plus the mac size.
292 #define SSL3_RT_MAX_ENCRYPTED_OVERHEAD (256 + SSL3_RT_MAX_MD_SIZE)
294 /* OpenSSL currently only uses a padding length of at most one block so
295 * the send overhead is smaller.
298 #define SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD \
299 (SSL_RT_MAX_CIPHER_BLOCK_SIZE + SSL3_RT_MAX_MD_SIZE)
301 /* If compression isn't used don't include the compression overhead */
303 #ifdef OPENSSL_NO_COMP
304 #define SSL3_RT_MAX_COMPRESSED_LENGTH SSL3_RT_MAX_PLAIN_LENGTH
306 #define SSL3_RT_MAX_COMPRESSED_LENGTH \
307 (SSL3_RT_MAX_PLAIN_LENGTH+SSL3_RT_MAX_COMPRESSED_OVERHEAD)
309 #define SSL3_RT_MAX_ENCRYPTED_LENGTH \
310 (SSL3_RT_MAX_ENCRYPTED_OVERHEAD+SSL3_RT_MAX_COMPRESSED_LENGTH)
311 #define SSL3_RT_MAX_PACKET_SIZE \
312 (SSL3_RT_MAX_ENCRYPTED_LENGTH+SSL3_RT_HEADER_LENGTH)
314 #define SSL3_MD_CLIENT_FINISHED_CONST "\x43\x4C\x4E\x54"
315 #define SSL3_MD_SERVER_FINISHED_CONST "\x53\x52\x56\x52"
317 #define SSL3_VERSION 0x0300
318 #define SSL3_VERSION_MAJOR 0x03
319 #define SSL3_VERSION_MINOR 0x00
321 #define SSL3_RT_CHANGE_CIPHER_SPEC 20
322 #define SSL3_RT_ALERT 21
323 #define SSL3_RT_HANDSHAKE 22
324 #define SSL3_RT_APPLICATION_DATA 23
325 #define TLS1_RT_HEARTBEAT 24
327 /* Pseudo content types to indicate additional parameters */
328 #define TLS1_RT_CRYPTO 0x1000
329 #define TLS1_RT_CRYPTO_PREMASTER (TLS1_RT_CRYPTO | 0x1)
330 #define TLS1_RT_CRYPTO_CLIENT_RANDOM (TLS1_RT_CRYPTO | 0x2)
331 #define TLS1_RT_CRYPTO_SERVER_RANDOM (TLS1_RT_CRYPTO | 0x3)
332 #define TLS1_RT_CRYPTO_MASTER (TLS1_RT_CRYPTO | 0x4)
334 #define TLS1_RT_CRYPTO_READ 0x0000
335 #define TLS1_RT_CRYPTO_WRITE 0x0100
336 #define TLS1_RT_CRYPTO_MAC (TLS1_RT_CRYPTO | 0x5)
337 #define TLS1_RT_CRYPTO_KEY (TLS1_RT_CRYPTO | 0x6)
338 #define TLS1_RT_CRYPTO_IV (TLS1_RT_CRYPTO | 0x7)
339 #define TLS1_RT_CRYPTO_FIXED_IV (TLS1_RT_CRYPTO | 0x8)
341 /* Pseudo content type for SSL/TLS header info */
342 #define SSL3_RT_HEADER 0x100
344 #define SSL3_AL_WARNING 1
345 #define SSL3_AL_FATAL 2
347 #define SSL3_AD_CLOSE_NOTIFY 0
348 #define SSL3_AD_UNEXPECTED_MESSAGE 10 /* fatal */
349 #define SSL3_AD_BAD_RECORD_MAC 20 /* fatal */
350 #define SSL3_AD_DECOMPRESSION_FAILURE 30 /* fatal */
351 #define SSL3_AD_HANDSHAKE_FAILURE 40 /* fatal */
352 #define SSL3_AD_NO_CERTIFICATE 41
353 #define SSL3_AD_BAD_CERTIFICATE 42
354 #define SSL3_AD_UNSUPPORTED_CERTIFICATE 43
355 #define SSL3_AD_CERTIFICATE_REVOKED 44
356 #define SSL3_AD_CERTIFICATE_EXPIRED 45
357 #define SSL3_AD_CERTIFICATE_UNKNOWN 46
358 #define SSL3_AD_ILLEGAL_PARAMETER 47 /* fatal */
360 #define TLS1_HB_REQUEST 1
361 #define TLS1_HB_RESPONSE 2
363 #ifndef OPENSSL_NO_SSL_INTERN
365 typedef struct ssl3_record_st
367 /*r */ int type; /* type of record */
368 /*rw*/ unsigned int length; /* How many bytes available */
369 /*r */ unsigned int off; /* read/write offset into 'buf' */
370 /*rw*/ unsigned char *data; /* pointer to the record data */
371 /*rw*/ unsigned char *input; /* where the decode bytes are */
372 /*r */ unsigned char *comp; /* only used with decompression - malloc()ed */
373 /*r */ unsigned long epoch; /* epoch number, needed by DTLS1 */
374 /*r */ unsigned char seq_num[8]; /* sequence number, needed by DTLS1 */
377 typedef struct ssl3_buffer_st
379 unsigned char *buf; /* at least SSL3_RT_MAX_PACKET_SIZE bytes,
380 * see ssl3_setup_buffers() */
381 size_t len; /* buffer size */
382 int offset; /* where to 'copy from' */
383 int left; /* how many bytes left */
388 #define SSL3_CT_RSA_SIGN 1
389 #define SSL3_CT_DSS_SIGN 2
390 #define SSL3_CT_RSA_FIXED_DH 3
391 #define SSL3_CT_DSS_FIXED_DH 4
392 #define SSL3_CT_RSA_EPHEMERAL_DH 5
393 #define SSL3_CT_DSS_EPHEMERAL_DH 6
394 #define SSL3_CT_FORTEZZA_DMS 20
395 /* SSL3_CT_NUMBER is used to size arrays and it must be large
396 * enough to contain all of the cert types defined either for
399 #define SSL3_CT_NUMBER 9
402 #define SSL3_FLAGS_NO_RENEGOTIATE_CIPHERS 0x0001
403 #define SSL3_FLAGS_DELAY_CLIENT_FINISHED 0x0002
404 #define SSL3_FLAGS_POP_BUFFER 0x0004
405 #define TLS1_FLAGS_TLS_PADDING_BUG 0x0008
406 #define TLS1_FLAGS_SKIP_CERT_VERIFY 0x0010
407 #define TLS1_FLAGS_KEEP_HANDSHAKE 0x0020
409 /* SSL3_FLAGS_SGC_RESTART_DONE is set when we
410 * restart a handshake because of MS SGC and so prevents us
411 * from restarting the handshake in a loop. It's reset on a
412 * renegotiation, so effectively limits the client to one restart
413 * per negotiation. This limits the possibility of a DDoS
414 * attack where the client handshakes in a loop using SGC to
415 * restart. Servers which permit renegotiation can still be
416 * effected, but we can't prevent that.
418 #define SSL3_FLAGS_SGC_RESTART_DONE 0x0040
420 #ifndef OPENSSL_NO_SSL_INTERN
422 typedef struct ssl3_state_st
425 int delay_buf_pop_ret;
427 unsigned char read_sequence[8];
428 int read_mac_secret_size;
429 unsigned char read_mac_secret[EVP_MAX_MD_SIZE];
430 unsigned char write_sequence[8];
431 int write_mac_secret_size;
432 unsigned char write_mac_secret[EVP_MAX_MD_SIZE];
434 unsigned char server_random[SSL3_RANDOM_SIZE];
435 unsigned char client_random[SSL3_RANDOM_SIZE];
437 /* flags for countermeasure against known-IV weakness */
438 int need_empty_fragments;
439 int empty_fragment_done;
441 /* The value of 'extra' when the buffers were initialized */
444 SSL3_BUFFER rbuf; /* read IO goes into here */
445 SSL3_BUFFER wbuf; /* write IO goes into here */
447 SSL3_RECORD rrec; /* each decoded record goes in here */
448 SSL3_RECORD wrec; /* goes out from here */
450 /* storage for Alert/Handshake protocol data received but not
451 * yet processed by ssl3_read_bytes: */
452 unsigned char alert_fragment[2];
453 unsigned int alert_fragment_len;
454 unsigned char handshake_fragment[4];
455 unsigned int handshake_fragment_len;
457 /* partial write - check the numbers match */
458 unsigned int wnum; /* number of bytes sent so far */
459 int wpend_tot; /* number bytes written */
461 int wpend_ret; /* number of bytes submitted */
462 const unsigned char *wpend_buf;
464 /* used during startup, digest all incoming/outgoing packets */
465 BIO *handshake_buffer;
466 /* When set of handshake digests is determined, buffer is hashed
467 * and freed and MD_CTX-es for all required digests are stored in
469 EVP_MD_CTX **handshake_dgst;
470 /* this is set whenerver we see a change_cipher_spec message
471 * come in when we are not looking for one */
472 int change_cipher_spec;
476 /* we allow one fatal and one warning alert to be outstanding,
477 * send close alert via the warning alert */
479 unsigned char send_alert[2];
481 /* This flag is set when we should renegotiate ASAP, basically when
482 * there is no more data in the read or write buffers */
484 int total_renegotiations;
485 int num_renegotiations;
487 int in_read_app_data;
489 /* Opaque PRF input as used for the current handshake.
490 * These fields are used only if TLSEXT_TYPE_opaque_prf_input is defined
491 * (otherwise, they are merely present to improve binary compatibility) */
492 void *client_opaque_prf_input;
493 size_t client_opaque_prf_input_len;
494 void *server_opaque_prf_input;
495 size_t server_opaque_prf_input_len;
498 /* actually only needs to be 16+20 */
499 unsigned char cert_verify_md[EVP_MAX_MD_SIZE*2];
501 /* actually only need to be 16+20 for SSLv3 and 12 for TLS */
502 unsigned char finish_md[EVP_MAX_MD_SIZE*2];
504 unsigned char peer_finish_md[EVP_MAX_MD_SIZE*2];
505 int peer_finish_md_len;
507 unsigned long message_size;
510 /* used to hold the new cipher we are going to use */
511 const SSL_CIPHER *new_cipher;
512 #ifndef OPENSSL_NO_DH
516 #ifndef OPENSSL_NO_ECDH
517 EC_KEY *ecdh; /* holds short lived ECDH key */
520 /* used when SSL_ST_FLUSH_DATA is entered */
525 /* used for certificate requests */
528 char ctype[SSL3_CT_NUMBER];
529 STACK_OF(X509_NAME) *ca_names;
533 int key_block_length;
534 unsigned char *key_block;
536 const EVP_CIPHER *new_sym_enc;
537 const EVP_MD *new_hash;
538 int new_mac_pkey_type;
539 int new_mac_secret_size;
540 #ifndef OPENSSL_NO_COMP
541 const SSL_COMP *new_compression;
543 char *new_compression;
548 /* Connection binding to prevent renegotiation attacks */
549 unsigned char previous_client_finished[EVP_MAX_MD_SIZE];
550 unsigned char previous_client_finished_len;
551 unsigned char previous_server_finished[EVP_MAX_MD_SIZE];
552 unsigned char previous_server_finished_len;
553 int send_connection_binding; /* TODOEKR */
555 #ifndef OPENSSL_NO_NEXTPROTONEG
556 /* Set if we saw the Next Protocol Negotiation extension from our peer. */
557 int next_proto_neg_seen;
560 #ifndef OPENSSL_NO_TLSEXT
561 /* tlsext_authz_client_types contains an array of supported authz
562 * types, as advertised by the client. The array is sorted and
563 * does not contain any duplicates. */
564 unsigned char *tlsext_authz_client_types;
565 size_t tlsext_authz_client_types_len;
566 /* tlsext_authz_promised_to_client is true iff we're a server and we
567 * echoed the client's supplemental data extension and therefore must
568 * send a supplemental data handshake message. */
569 char tlsext_authz_promised_to_client;
570 /* tlsext_authz_server_promised is true iff we're a client and the
571 * server echoed our server_authz extension and therefore must send us
572 * a supplemental data handshake message. */
573 char tlsext_authz_server_promised;
575 /* tlsext_custom_types contains an array of TLS Extension types which
576 * were advertised by the client in its ClientHello, which were not
577 * otherwise handled by OpenSSL, and which the server has registered
578 * a custom_srv_ext_record to handle.
579 * The array does not contain any duplicates, and is in the same order
580 * as the types were received in the client hello. */
581 unsigned short *tlsext_custom_types;
582 size_t tlsext_custom_types_count; /* how many tlsext_custom_types */
584 #ifndef OPENSSL_NO_EC
585 /* This is set to true if we believe that this is a version of Safari
586 * running on OS X 10.6 or newer. We wish to know this because Safari
587 * on 10.8 .. 10.8.3 has broken ECDHE-ECDSA support. */
588 char is_probably_safari;
589 #endif /* !OPENSSL_NO_EC */
591 #endif /* !OPENSSL_NO_TLSEXT */
599 #define SSL3_ST_CW_FLUSH (0x100|SSL_ST_CONNECT)
600 #ifndef OPENSSL_NO_SCTP
601 #define DTLS1_SCTP_ST_CW_WRITE_SOCK (0x310|SSL_ST_CONNECT)
602 #define DTLS1_SCTP_ST_CR_READ_SOCK (0x320|SSL_ST_CONNECT)
604 /* write to server */
605 #define SSL3_ST_CW_CLNT_HELLO_A (0x110|SSL_ST_CONNECT)
606 #define SSL3_ST_CW_CLNT_HELLO_B (0x111|SSL_ST_CONNECT)
607 /* read from server */
608 #define SSL3_ST_CR_SRVR_HELLO_A (0x120|SSL_ST_CONNECT)
609 #define SSL3_ST_CR_SRVR_HELLO_B (0x121|SSL_ST_CONNECT)
610 #define DTLS1_ST_CR_HELLO_VERIFY_REQUEST_A (0x126|SSL_ST_CONNECT)
611 #define DTLS1_ST_CR_HELLO_VERIFY_REQUEST_B (0x127|SSL_ST_CONNECT)
612 #define SSL3_ST_CR_CERT_A (0x130|SSL_ST_CONNECT)
613 #define SSL3_ST_CR_CERT_B (0x131|SSL_ST_CONNECT)
614 #define SSL3_ST_CR_KEY_EXCH_A (0x140|SSL_ST_CONNECT)
615 #define SSL3_ST_CR_KEY_EXCH_B (0x141|SSL_ST_CONNECT)
616 #define SSL3_ST_CR_CERT_REQ_A (0x150|SSL_ST_CONNECT)
617 #define SSL3_ST_CR_CERT_REQ_B (0x151|SSL_ST_CONNECT)
618 #define SSL3_ST_CR_SRVR_DONE_A (0x160|SSL_ST_CONNECT)
619 #define SSL3_ST_CR_SRVR_DONE_B (0x161|SSL_ST_CONNECT)
620 #define SSL3_ST_CR_SUPPLEMENTAL_DATA_A (0x210|SSL_ST_CONNECT)
621 #define SSL3_ST_CR_SUPPLEMENTAL_DATA_B (0x211|SSL_ST_CONNECT)
622 /* write to server */
623 #define SSL3_ST_CW_CERT_A (0x170|SSL_ST_CONNECT)
624 #define SSL3_ST_CW_CERT_B (0x171|SSL_ST_CONNECT)
625 #define SSL3_ST_CW_CERT_C (0x172|SSL_ST_CONNECT)
626 #define SSL3_ST_CW_CERT_D (0x173|SSL_ST_CONNECT)
627 #define SSL3_ST_CW_KEY_EXCH_A (0x180|SSL_ST_CONNECT)
628 #define SSL3_ST_CW_KEY_EXCH_B (0x181|SSL_ST_CONNECT)
629 #define SSL3_ST_CW_CERT_VRFY_A (0x190|SSL_ST_CONNECT)
630 #define SSL3_ST_CW_CERT_VRFY_B (0x191|SSL_ST_CONNECT)
631 #define SSL3_ST_CW_CHANGE_A (0x1A0|SSL_ST_CONNECT)
632 #define SSL3_ST_CW_CHANGE_B (0x1A1|SSL_ST_CONNECT)
633 #ifndef OPENSSL_NO_NEXTPROTONEG
634 #define SSL3_ST_CW_NEXT_PROTO_A (0x200|SSL_ST_CONNECT)
635 #define SSL3_ST_CW_NEXT_PROTO_B (0x201|SSL_ST_CONNECT)
637 #define SSL3_ST_CW_FINISHED_A (0x1B0|SSL_ST_CONNECT)
638 #define SSL3_ST_CW_FINISHED_B (0x1B1|SSL_ST_CONNECT)
639 /* read from server */
640 #define SSL3_ST_CR_CHANGE_A (0x1C0|SSL_ST_CONNECT)
641 #define SSL3_ST_CR_CHANGE_B (0x1C1|SSL_ST_CONNECT)
642 #define SSL3_ST_CR_FINISHED_A (0x1D0|SSL_ST_CONNECT)
643 #define SSL3_ST_CR_FINISHED_B (0x1D1|SSL_ST_CONNECT)
644 #define SSL3_ST_CR_SESSION_TICKET_A (0x1E0|SSL_ST_CONNECT)
645 #define SSL3_ST_CR_SESSION_TICKET_B (0x1E1|SSL_ST_CONNECT)
646 #define SSL3_ST_CR_CERT_STATUS_A (0x1F0|SSL_ST_CONNECT)
647 #define SSL3_ST_CR_CERT_STATUS_B (0x1F1|SSL_ST_CONNECT)
651 #define SSL3_ST_SW_FLUSH (0x100|SSL_ST_ACCEPT)
652 #ifndef OPENSSL_NO_SCTP
653 #define DTLS1_SCTP_ST_SW_WRITE_SOCK (0x310|SSL_ST_ACCEPT)
654 #define DTLS1_SCTP_ST_SR_READ_SOCK (0x320|SSL_ST_ACCEPT)
656 /* read from client */
657 /* Do not change the number values, they do matter */
658 #define SSL3_ST_SR_CLNT_HELLO_A (0x110|SSL_ST_ACCEPT)
659 #define SSL3_ST_SR_CLNT_HELLO_B (0x111|SSL_ST_ACCEPT)
660 #define SSL3_ST_SR_CLNT_HELLO_C (0x112|SSL_ST_ACCEPT)
661 /* write to client */
662 #define DTLS1_ST_SW_HELLO_VERIFY_REQUEST_A (0x113|SSL_ST_ACCEPT)
663 #define DTLS1_ST_SW_HELLO_VERIFY_REQUEST_B (0x114|SSL_ST_ACCEPT)
664 #define SSL3_ST_SW_HELLO_REQ_A (0x120|SSL_ST_ACCEPT)
665 #define SSL3_ST_SW_HELLO_REQ_B (0x121|SSL_ST_ACCEPT)
666 #define SSL3_ST_SW_HELLO_REQ_C (0x122|SSL_ST_ACCEPT)
667 #define SSL3_ST_SW_SRVR_HELLO_A (0x130|SSL_ST_ACCEPT)
668 #define SSL3_ST_SW_SRVR_HELLO_B (0x131|SSL_ST_ACCEPT)
669 #define SSL3_ST_SW_CERT_A (0x140|SSL_ST_ACCEPT)
670 #define SSL3_ST_SW_CERT_B (0x141|SSL_ST_ACCEPT)
671 #define SSL3_ST_SW_KEY_EXCH_A (0x150|SSL_ST_ACCEPT)
672 #define SSL3_ST_SW_KEY_EXCH_B (0x151|SSL_ST_ACCEPT)
673 #define SSL3_ST_SW_CERT_REQ_A (0x160|SSL_ST_ACCEPT)
674 #define SSL3_ST_SW_CERT_REQ_B (0x161|SSL_ST_ACCEPT)
675 #define SSL3_ST_SW_SRVR_DONE_A (0x170|SSL_ST_ACCEPT)
676 #define SSL3_ST_SW_SRVR_DONE_B (0x171|SSL_ST_ACCEPT)
677 /* read from client */
678 #define SSL3_ST_SR_CERT_A (0x180|SSL_ST_ACCEPT)
679 #define SSL3_ST_SR_CERT_B (0x181|SSL_ST_ACCEPT)
680 #define SSL3_ST_SR_KEY_EXCH_A (0x190|SSL_ST_ACCEPT)
681 #define SSL3_ST_SR_KEY_EXCH_B (0x191|SSL_ST_ACCEPT)
682 #define SSL3_ST_SR_CERT_VRFY_A (0x1A0|SSL_ST_ACCEPT)
683 #define SSL3_ST_SR_CERT_VRFY_B (0x1A1|SSL_ST_ACCEPT)
684 #define SSL3_ST_SR_CHANGE_A (0x1B0|SSL_ST_ACCEPT)
685 #define SSL3_ST_SR_CHANGE_B (0x1B1|SSL_ST_ACCEPT)
686 #ifndef OPENSSL_NO_NEXTPROTONEG
687 #define SSL3_ST_SR_NEXT_PROTO_A (0x210|SSL_ST_ACCEPT)
688 #define SSL3_ST_SR_NEXT_PROTO_B (0x211|SSL_ST_ACCEPT)
690 #define SSL3_ST_SR_FINISHED_A (0x1C0|SSL_ST_ACCEPT)
691 #define SSL3_ST_SR_FINISHED_B (0x1C1|SSL_ST_ACCEPT)
692 /* write to client */
693 #define SSL3_ST_SW_CHANGE_A (0x1D0|SSL_ST_ACCEPT)
694 #define SSL3_ST_SW_CHANGE_B (0x1D1|SSL_ST_ACCEPT)
695 #define SSL3_ST_SW_FINISHED_A (0x1E0|SSL_ST_ACCEPT)
696 #define SSL3_ST_SW_FINISHED_B (0x1E1|SSL_ST_ACCEPT)
697 #define SSL3_ST_SW_SESSION_TICKET_A (0x1F0|SSL_ST_ACCEPT)
698 #define SSL3_ST_SW_SESSION_TICKET_B (0x1F1|SSL_ST_ACCEPT)
699 #define SSL3_ST_SW_CERT_STATUS_A (0x200|SSL_ST_ACCEPT)
700 #define SSL3_ST_SW_CERT_STATUS_B (0x201|SSL_ST_ACCEPT)
701 #define SSL3_ST_SW_SUPPLEMENTAL_DATA_A (0x220|SSL_ST_ACCEPT)
702 #define SSL3_ST_SW_SUPPLEMENTAL_DATA_B (0x221|SSL_ST_ACCEPT)
704 #define SSL3_MT_HELLO_REQUEST 0
705 #define SSL3_MT_CLIENT_HELLO 1
706 #define SSL3_MT_SERVER_HELLO 2
707 #define SSL3_MT_NEWSESSION_TICKET 4
708 #define SSL3_MT_CERTIFICATE 11
709 #define SSL3_MT_SERVER_KEY_EXCHANGE 12
710 #define SSL3_MT_CERTIFICATE_REQUEST 13
711 #define SSL3_MT_SERVER_DONE 14
712 #define SSL3_MT_CERTIFICATE_VERIFY 15
713 #define SSL3_MT_CLIENT_KEY_EXCHANGE 16
714 #define SSL3_MT_FINISHED 20
715 #define SSL3_MT_CERTIFICATE_STATUS 22
716 #define SSL3_MT_SUPPLEMENTAL_DATA 23
717 #ifndef OPENSSL_NO_NEXTPROTONEG
718 #define SSL3_MT_NEXT_PROTO 67
720 #define DTLS1_MT_HELLO_VERIFY_REQUEST 3
723 #define SSL3_MT_CCS 1
725 /* These are used when changing over to a new cipher */
726 #define SSL3_CC_READ 0x01
727 #define SSL3_CC_WRITE 0x02
728 #define SSL3_CC_CLIENT 0x10
729 #define SSL3_CC_SERVER 0x20
730 #define SSL3_CHANGE_CIPHER_CLIENT_WRITE (SSL3_CC_CLIENT|SSL3_CC_WRITE)
731 #define SSL3_CHANGE_CIPHER_SERVER_READ (SSL3_CC_SERVER|SSL3_CC_READ)
732 #define SSL3_CHANGE_CIPHER_CLIENT_READ (SSL3_CC_CLIENT|SSL3_CC_READ)
733 #define SSL3_CHANGE_CIPHER_SERVER_WRITE (SSL3_CC_SERVER|SSL3_CC_WRITE)
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