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 #include <openssl/buf.h>
121 #include <openssl/evp.h>
122 #include <openssl/ssl.h>
128 /* Signalling cipher suite value: from draft-ietf-tls-renegotiation-03.txt */
129 #define SSL3_CK_SCSV 0x030000FF
130 /* Fallback signalling cipher suite value: not IANA assigned.
131 * See https://tools.ietf.org/html/draft-bmoeller-tls-downgrade-scsv-01 */
132 #define SSL3_CK_FALLBACK_SCSV 0x03005600
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
165 #define SSL3_TXT_RSA_NULL_MD5 "NULL-MD5"
166 #define SSL3_TXT_RSA_NULL_SHA "NULL-SHA"
167 #define SSL3_TXT_RSA_RC4_40_MD5 "EXP-RC4-MD5"
168 #define SSL3_TXT_RSA_RC4_128_MD5 "RC4-MD5"
169 #define SSL3_TXT_RSA_RC4_128_SHA "RC4-SHA"
170 #define SSL3_TXT_RSA_RC2_40_MD5 "EXP-RC2-CBC-MD5"
171 #define SSL3_TXT_RSA_IDEA_128_SHA "IDEA-CBC-SHA"
172 #define SSL3_TXT_RSA_DES_40_CBC_SHA "EXP-DES-CBC-SHA"
173 #define SSL3_TXT_RSA_DES_64_CBC_SHA "DES-CBC-SHA"
174 #define SSL3_TXT_RSA_DES_192_CBC3_SHA "DES-CBC3-SHA"
176 #define SSL3_TXT_DH_DSS_DES_40_CBC_SHA "EXP-DH-DSS-DES-CBC-SHA"
177 #define SSL3_TXT_DH_DSS_DES_64_CBC_SHA "DH-DSS-DES-CBC-SHA"
178 #define SSL3_TXT_DH_DSS_DES_192_CBC3_SHA "DH-DSS-DES-CBC3-SHA"
179 #define SSL3_TXT_DH_RSA_DES_40_CBC_SHA "EXP-DH-RSA-DES-CBC-SHA"
180 #define SSL3_TXT_DH_RSA_DES_64_CBC_SHA "DH-RSA-DES-CBC-SHA"
181 #define SSL3_TXT_DH_RSA_DES_192_CBC3_SHA "DH-RSA-DES-CBC3-SHA"
183 #define SSL3_TXT_EDH_DSS_DES_40_CBC_SHA "EXP-EDH-DSS-DES-CBC-SHA"
184 #define SSL3_TXT_EDH_DSS_DES_64_CBC_SHA "EDH-DSS-DES-CBC-SHA"
185 #define SSL3_TXT_EDH_DSS_DES_192_CBC3_SHA "EDH-DSS-DES-CBC3-SHA"
186 #define SSL3_TXT_EDH_RSA_DES_40_CBC_SHA "EXP-EDH-RSA-DES-CBC-SHA"
187 #define SSL3_TXT_EDH_RSA_DES_64_CBC_SHA "EDH-RSA-DES-CBC-SHA"
188 #define SSL3_TXT_EDH_RSA_DES_192_CBC3_SHA "EDH-RSA-DES-CBC3-SHA"
190 #define SSL3_TXT_ADH_RC4_40_MD5 "EXP-ADH-RC4-MD5"
191 #define SSL3_TXT_ADH_RC4_128_MD5 "ADH-RC4-MD5"
192 #define SSL3_TXT_ADH_DES_40_CBC_SHA "EXP-ADH-DES-CBC-SHA"
193 #define SSL3_TXT_ADH_DES_64_CBC_SHA "ADH-DES-CBC-SHA"
194 #define SSL3_TXT_ADH_DES_192_CBC_SHA "ADH-DES-CBC3-SHA"
196 #define SSL3_SSL_SESSION_ID_LENGTH 32
197 #define SSL3_MAX_SSL_SESSION_ID_LENGTH 32
199 #define SSL3_MASTER_SECRET_SIZE 48
200 #define SSL3_RANDOM_SIZE 32
201 #define SSL3_SESSION_ID_SIZE 32
202 #define SSL3_RT_HEADER_LENGTH 5
204 #define SSL3_HM_HEADER_LENGTH 4
206 #ifndef SSL3_ALIGN_PAYLOAD
207 /* Some will argue that this increases memory footprint, but it's
208 * not actually true. Point is that malloc has to return at least
209 * 64-bit aligned pointers, meaning that allocating 5 bytes wastes
210 * 3 bytes in either case. Suggested pre-gaping simply moves these
211 * wasted bytes from the end of allocated region to its front,
212 * but makes data payload aligned, which improves performance:-) */
213 # define SSL3_ALIGN_PAYLOAD 8
215 # if (SSL3_ALIGN_PAYLOAD&(SSL3_ALIGN_PAYLOAD-1))!=0
216 # error "insane SSL3_ALIGN_PAYLOAD"
217 # undef SSL3_ALIGN_PAYLOAD
221 /* This is the maximum MAC (digest) size used by the SSL library.
222 * Currently maximum of 20 is used by SHA1, but we reserve for
223 * future extension for 512-bit hashes.
226 #define SSL3_RT_MAX_MD_SIZE 64
228 /* Maximum block size used in all ciphersuites. Currently 16 for AES.
231 #define SSL_RT_MAX_CIPHER_BLOCK_SIZE 16
233 #define SSL3_RT_MAX_EXTRA (16384)
235 /* Maximum plaintext length: defined by SSL/TLS standards */
236 #define SSL3_RT_MAX_PLAIN_LENGTH 16384
237 /* Maximum compression overhead: defined by SSL/TLS standards */
238 #define SSL3_RT_MAX_COMPRESSED_OVERHEAD 1024
240 /* The standards give a maximum encryption overhead of 1024 bytes.
241 * In practice the value is lower than this. The overhead is the maximum
242 * number of padding bytes (256) plus the mac size.
244 #define SSL3_RT_MAX_ENCRYPTED_OVERHEAD (256 + SSL3_RT_MAX_MD_SIZE)
246 /* OpenSSL currently only uses a padding length of at most one block so
247 * the send overhead is smaller.
250 #define SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD \
251 (SSL_RT_MAX_CIPHER_BLOCK_SIZE + SSL3_RT_MAX_MD_SIZE)
253 /* If compression isn't used don't include the compression overhead */
255 #define SSL3_RT_MAX_COMPRESSED_LENGTH \
256 (SSL3_RT_MAX_PLAIN_LENGTH+SSL3_RT_MAX_COMPRESSED_OVERHEAD)
257 #define SSL3_RT_MAX_ENCRYPTED_LENGTH \
258 (SSL3_RT_MAX_ENCRYPTED_OVERHEAD+SSL3_RT_MAX_COMPRESSED_LENGTH)
259 #define SSL3_RT_MAX_PACKET_SIZE \
260 (SSL3_RT_MAX_ENCRYPTED_LENGTH+SSL3_RT_HEADER_LENGTH)
262 #define SSL3_MD_CLIENT_FINISHED_CONST "\x43\x4C\x4E\x54"
263 #define SSL3_MD_SERVER_FINISHED_CONST "\x53\x52\x56\x52"
265 #define SSL3_VERSION 0x0300
266 #define SSL3_VERSION_MAJOR 0x03
267 #define SSL3_VERSION_MINOR 0x00
269 #define SSL3_RT_CHANGE_CIPHER_SPEC 20
270 #define SSL3_RT_ALERT 21
271 #define SSL3_RT_HANDSHAKE 22
272 #define SSL3_RT_APPLICATION_DATA 23
274 /* Pseudo content types to indicate additional parameters */
275 #define TLS1_RT_CRYPTO 0x1000
276 #define TLS1_RT_CRYPTO_PREMASTER (TLS1_RT_CRYPTO | 0x1)
277 #define TLS1_RT_CRYPTO_CLIENT_RANDOM (TLS1_RT_CRYPTO | 0x2)
278 #define TLS1_RT_CRYPTO_SERVER_RANDOM (TLS1_RT_CRYPTO | 0x3)
279 #define TLS1_RT_CRYPTO_MASTER (TLS1_RT_CRYPTO | 0x4)
281 #define TLS1_RT_CRYPTO_READ 0x0000
282 #define TLS1_RT_CRYPTO_WRITE 0x0100
283 #define TLS1_RT_CRYPTO_MAC (TLS1_RT_CRYPTO | 0x5)
284 #define TLS1_RT_CRYPTO_KEY (TLS1_RT_CRYPTO | 0x6)
285 #define TLS1_RT_CRYPTO_IV (TLS1_RT_CRYPTO | 0x7)
286 #define TLS1_RT_CRYPTO_FIXED_IV (TLS1_RT_CRYPTO | 0x8)
288 /* Pseudo content type for SSL/TLS header info */
289 #define SSL3_RT_HEADER 0x100
291 #define SSL3_AL_WARNING 1
292 #define SSL3_AL_FATAL 2
294 #define SSL3_AD_CLOSE_NOTIFY 0
295 #define SSL3_AD_UNEXPECTED_MESSAGE 10 /* fatal */
296 #define SSL3_AD_BAD_RECORD_MAC 20 /* fatal */
297 #define SSL3_AD_DECOMPRESSION_FAILURE 30 /* fatal */
298 #define SSL3_AD_HANDSHAKE_FAILURE 40 /* fatal */
299 #define SSL3_AD_NO_CERTIFICATE 41
300 #define SSL3_AD_BAD_CERTIFICATE 42
301 #define SSL3_AD_UNSUPPORTED_CERTIFICATE 43
302 #define SSL3_AD_CERTIFICATE_REVOKED 44
303 #define SSL3_AD_CERTIFICATE_EXPIRED 45
304 #define SSL3_AD_CERTIFICATE_UNKNOWN 46
305 #define SSL3_AD_ILLEGAL_PARAMETER 47 /* fatal */
306 #define SSL3_AD_INAPPROPRIATE_FALLBACK 86 /* fatal */
308 #ifndef OPENSSL_NO_SSL_INTERN
310 typedef struct ssl3_record_st
312 /*r */ int type; /* type of record */
313 /*rw*/ unsigned int length; /* How many bytes available */
314 /*r */ unsigned int off; /* read/write offset into 'buf' */
315 /*rw*/ unsigned char *data; /* pointer to the record data */
316 /*rw*/ unsigned char *input; /* where the decode bytes are */
317 /*r */ unsigned long epoch; /* epoch number, needed by DTLS1 */
318 /*r */ unsigned char seq_num[8]; /* sequence number, needed by DTLS1 */
321 typedef struct ssl3_buffer_st
323 unsigned char *buf; /* at least SSL3_RT_MAX_PACKET_SIZE bytes,
324 * see ssl3_setup_buffers() */
325 size_t len; /* buffer size */
326 int offset; /* where to 'copy from' */
327 int left; /* how many bytes left */
332 #define SSL3_CT_RSA_SIGN 1
333 #define SSL3_CT_DSS_SIGN 2
334 #define SSL3_CT_RSA_FIXED_DH 3
335 #define SSL3_CT_DSS_FIXED_DH 4
336 #define SSL3_CT_RSA_EPHEMERAL_DH 5
337 #define SSL3_CT_DSS_EPHEMERAL_DH 6
338 #define SSL3_CT_FORTEZZA_DMS 20
341 #define SSL3_FLAGS_NO_RENEGOTIATE_CIPHERS 0x0001
342 #define SSL3_FLAGS_POP_BUFFER 0x0004
343 /* TODO(davidben): This flag can probably be merged into s3->change_cipher_spec
344 * to something tri-state. (Normal / Expect CCS / Between CCS and Finished). */
345 #define SSL3_FLAGS_EXPECT_CCS 0x0080
347 #ifndef OPENSSL_NO_SSL_INTERN
349 typedef struct ssl3_state_st
352 int delay_buf_pop_ret;
354 unsigned char read_sequence[8];
355 int read_mac_secret_size;
356 unsigned char read_mac_secret[EVP_MAX_MD_SIZE];
357 unsigned char write_sequence[8];
358 int write_mac_secret_size;
359 unsigned char write_mac_secret[EVP_MAX_MD_SIZE];
361 unsigned char server_random[SSL3_RANDOM_SIZE];
362 unsigned char client_random[SSL3_RANDOM_SIZE];
364 /* flags for countermeasure against known-IV weakness */
365 int need_record_splitting;
366 int record_split_done;
368 /* The value of 'extra' when the buffers were initialized */
371 SSL3_BUFFER rbuf; /* read IO goes into here */
372 SSL3_BUFFER wbuf; /* write IO goes into here */
374 SSL3_RECORD rrec; /* each decoded record goes in here */
375 SSL3_RECORD wrec; /* goes out from here */
377 /* storage for Alert/Handshake protocol data received but not
378 * yet processed by ssl3_read_bytes: */
379 unsigned char alert_fragment[2];
380 unsigned int alert_fragment_len;
381 unsigned char handshake_fragment[4];
382 unsigned int handshake_fragment_len;
384 /* partial write - check the numbers match */
385 unsigned int wnum; /* number of bytes sent so far */
386 int wpend_tot; /* number bytes written */
388 int wpend_ret; /* number of bytes submitted */
389 const unsigned char *wpend_buf;
391 /* used during startup, digest all incoming/outgoing packets */
392 BIO *handshake_buffer;
393 /* When set of handshake digests is determined, buffer is hashed
394 * and freed and MD_CTX-es for all required digests are stored in
396 EVP_MD_CTX **handshake_dgst;
397 /* this is set whenerver we see a change_cipher_spec message
398 * come in when we are not looking for one */
399 int change_cipher_spec;
403 /* we allow one fatal and one warning alert to be outstanding,
404 * send close alert via the warning alert */
406 unsigned char send_alert[2];
408 /* This flag is set when we should renegotiate ASAP, basically when
409 * there is no more data in the read or write buffers */
411 int total_renegotiations;
412 int num_renegotiations;
414 int in_read_app_data;
416 /* State pertaining to the pending handshake.
418 * TODO(davidben): State is current spread all over the place. Move
419 * pending handshake state here so it can be managed separately from
420 * established connection state in case of renegotiations.
423 /* actually only need to be 16+20 for SSLv3 and 12 for TLS */
424 unsigned char finish_md[EVP_MAX_MD_SIZE*2];
426 unsigned char peer_finish_md[EVP_MAX_MD_SIZE*2];
427 int peer_finish_md_len;
429 unsigned long message_size;
432 /* used to hold the new cipher we are going to use */
433 const SSL_CIPHER *new_cipher;
436 EC_KEY *ecdh; /* holds short lived ECDH key */
438 /* used when SSL_ST_FLUSH_DATA is entered */
443 /* Client-only: cert_req determines if a client certificate is
444 * to be sent. This is 0 if no client Certificate message is to
445 * be sent, 1 if there is a client certificate, and 2 to send an
446 * empty client Certificate message. */
449 /* Client-only: ca_names contains the list of CAs received in a
450 * CertificateRequest message. */
451 STACK_OF(X509_NAME) *ca_names;
453 /* Client-only: certificate_types contains the set of
454 * certificate types received in a CertificateRequest
456 unsigned char *certificate_types;
457 size_t num_certificate_types;
459 int key_block_length;
460 unsigned char *key_block;
462 const EVP_CIPHER *new_sym_enc;
463 const EVP_AEAD *new_aead;
464 const EVP_MD *new_hash;
465 int new_mac_pkey_type;
466 int new_mac_secret_size;
468 /* Server-only: cert_request is true if a client certificate was
472 /* certificate_status_expected is true if OCSP stapling was
473 * negotiated and the server is expected to send a
474 * CertificateStatus message. */
475 char certificate_status_expected;
477 /* peer_ecpointformatlist contains the EC point
478 * formats advertised by the peer. */
479 uint8_t *peer_ecpointformatlist;
480 size_t peer_ecpointformatlist_length;
482 /* Server-only: peer_ellipticcurvelist contains the EC
483 * curve IDs advertised by the peer. This is only set
484 * on the server's end. The server does not advertise
485 * this extension to the client. */
486 uint16_t *peer_ellipticcurvelist;
487 size_t peer_ellipticcurvelist_length;
489 /* extended_master_secret indicates whether the extended master
490 * secret computation is used in this handshake. Note that this
491 * is different from whether it was used for the current
492 * session. If this is a resumption handshake then EMS might be
493 * negotiated in the client and server hello messages, but it
494 * doesn't matter if the session that's being resumed didn't
495 * use it to create the master secret initially. */
496 char extended_master_secret;
499 /* Connection binding to prevent renegotiation attacks */
500 unsigned char previous_client_finished[EVP_MAX_MD_SIZE];
501 unsigned char previous_client_finished_len;
502 unsigned char previous_server_finished[EVP_MAX_MD_SIZE];
503 unsigned char previous_server_finished_len;
504 int send_connection_binding; /* TODOEKR */
506 /* Set if we saw the Next Protocol Negotiation extension from our peer. */
507 int next_proto_neg_seen;
510 * (we are in the process of transitioning from NPN to ALPN.) */
512 /* In a server these point to the selected ALPN protocol after the
513 * ClientHello has been processed. In a client these contain the
514 * protocol that the server selected once the ServerHello has been
516 uint8_t *alpn_selected;
517 size_t alpn_selected_len;
519 /* In a client, this means that the server supported Channel ID and that
520 * a Channel ID was sent. In a server it means that we echoed support
521 * for Channel IDs and that tlsext_channel_id will be valid after the
523 char tlsext_channel_id_valid;
524 /* tlsext_channel_id_new means that the updated Channel ID extension
525 * was negotiated. This is a temporary hack in the code to support both
526 * forms of Channel ID extension while we transition to the new format,
527 * which fixed a security issue. */
528 char tlsext_channel_id_new;
530 * If |tlsext_channel_id_valid| is true, then this contains the
531 * verified Channel ID from the client: a P256 point, (x,y), where
532 * each are big-endian values. */
533 unsigned char tlsext_channel_id[64];
541 #define SSL3_ST_CW_FLUSH (0x100|SSL_ST_CONNECT)
542 #define SSL3_ST_CUTTHROUGH_COMPLETE (0x101|SSL_ST_CONNECT)
543 /* write to server */
544 #define SSL3_ST_CW_CLNT_HELLO_A (0x110|SSL_ST_CONNECT)
545 #define SSL3_ST_CW_CLNT_HELLO_B (0x111|SSL_ST_CONNECT)
546 /* read from server */
547 #define SSL3_ST_CR_SRVR_HELLO_A (0x120|SSL_ST_CONNECT)
548 #define SSL3_ST_CR_SRVR_HELLO_B (0x121|SSL_ST_CONNECT)
549 #define DTLS1_ST_CR_HELLO_VERIFY_REQUEST_A (0x126|SSL_ST_CONNECT)
550 #define DTLS1_ST_CR_HELLO_VERIFY_REQUEST_B (0x127|SSL_ST_CONNECT)
551 #define SSL3_ST_CR_CERT_A (0x130|SSL_ST_CONNECT)
552 #define SSL3_ST_CR_CERT_B (0x131|SSL_ST_CONNECT)
553 #define SSL3_ST_CR_KEY_EXCH_A (0x140|SSL_ST_CONNECT)
554 #define SSL3_ST_CR_KEY_EXCH_B (0x141|SSL_ST_CONNECT)
555 #define SSL3_ST_CR_CERT_REQ_A (0x150|SSL_ST_CONNECT)
556 #define SSL3_ST_CR_CERT_REQ_B (0x151|SSL_ST_CONNECT)
557 #define SSL3_ST_CR_SRVR_DONE_A (0x160|SSL_ST_CONNECT)
558 #define SSL3_ST_CR_SRVR_DONE_B (0x161|SSL_ST_CONNECT)
559 /* write to server */
560 #define SSL3_ST_CW_CERT_A (0x170|SSL_ST_CONNECT)
561 #define SSL3_ST_CW_CERT_B (0x171|SSL_ST_CONNECT)
562 #define SSL3_ST_CW_CERT_C (0x172|SSL_ST_CONNECT)
563 #define SSL3_ST_CW_CERT_D (0x173|SSL_ST_CONNECT)
564 #define SSL3_ST_CW_KEY_EXCH_A (0x180|SSL_ST_CONNECT)
565 #define SSL3_ST_CW_KEY_EXCH_B (0x181|SSL_ST_CONNECT)
566 #define SSL3_ST_CW_CERT_VRFY_A (0x190|SSL_ST_CONNECT)
567 #define SSL3_ST_CW_CERT_VRFY_B (0x191|SSL_ST_CONNECT)
568 #define SSL3_ST_CW_CHANGE_A (0x1A0|SSL_ST_CONNECT)
569 #define SSL3_ST_CW_CHANGE_B (0x1A1|SSL_ST_CONNECT)
570 #define SSL3_ST_CW_NEXT_PROTO_A (0x200|SSL_ST_CONNECT)
571 #define SSL3_ST_CW_NEXT_PROTO_B (0x201|SSL_ST_CONNECT)
572 #define SSL3_ST_CW_CHANNEL_ID_A (0x220|SSL_ST_CONNECT)
573 #define SSL3_ST_CW_CHANNEL_ID_B (0x221|SSL_ST_CONNECT)
574 #define SSL3_ST_CW_FINISHED_A (0x1B0|SSL_ST_CONNECT)
575 #define SSL3_ST_CW_FINISHED_B (0x1B1|SSL_ST_CONNECT)
576 /* read from server */
577 #define SSL3_ST_CR_CHANGE (0x1C0|SSL_ST_CONNECT)
578 #define SSL3_ST_CR_FINISHED_A (0x1D0|SSL_ST_CONNECT)
579 #define SSL3_ST_CR_FINISHED_B (0x1D1|SSL_ST_CONNECT)
580 #define SSL3_ST_CR_SESSION_TICKET_A (0x1E0|SSL_ST_CONNECT)
581 #define SSL3_ST_CR_SESSION_TICKET_B (0x1E1|SSL_ST_CONNECT)
582 #define SSL3_ST_CR_CERT_STATUS_A (0x1F0|SSL_ST_CONNECT)
583 #define SSL3_ST_CR_CERT_STATUS_B (0x1F1|SSL_ST_CONNECT)
587 #define SSL3_ST_SW_FLUSH (0x100|SSL_ST_ACCEPT)
588 /* read from client */
589 /* Do not change the number values, they do matter */
590 #define SSL3_ST_SR_CLNT_HELLO_A (0x110|SSL_ST_ACCEPT)
591 #define SSL3_ST_SR_CLNT_HELLO_B (0x111|SSL_ST_ACCEPT)
592 #define SSL3_ST_SR_CLNT_HELLO_C (0x112|SSL_ST_ACCEPT)
593 #define SSL3_ST_SR_CLNT_HELLO_D (0x115|SSL_ST_ACCEPT)
594 /* write to client */
595 #define DTLS1_ST_SW_HELLO_VERIFY_REQUEST_A (0x113|SSL_ST_ACCEPT)
596 #define DTLS1_ST_SW_HELLO_VERIFY_REQUEST_B (0x114|SSL_ST_ACCEPT)
597 #define SSL3_ST_SW_HELLO_REQ_A (0x120|SSL_ST_ACCEPT)
598 #define SSL3_ST_SW_HELLO_REQ_B (0x121|SSL_ST_ACCEPT)
599 #define SSL3_ST_SW_HELLO_REQ_C (0x122|SSL_ST_ACCEPT)
600 #define SSL3_ST_SW_SRVR_HELLO_A (0x130|SSL_ST_ACCEPT)
601 #define SSL3_ST_SW_SRVR_HELLO_B (0x131|SSL_ST_ACCEPT)
602 #define SSL3_ST_SW_CERT_A (0x140|SSL_ST_ACCEPT)
603 #define SSL3_ST_SW_CERT_B (0x141|SSL_ST_ACCEPT)
604 #define SSL3_ST_SW_KEY_EXCH_A (0x150|SSL_ST_ACCEPT)
605 #define SSL3_ST_SW_KEY_EXCH_B (0x151|SSL_ST_ACCEPT)
606 #define SSL3_ST_SW_CERT_REQ_A (0x160|SSL_ST_ACCEPT)
607 #define SSL3_ST_SW_CERT_REQ_B (0x161|SSL_ST_ACCEPT)
608 #define SSL3_ST_SW_SRVR_DONE_A (0x170|SSL_ST_ACCEPT)
609 #define SSL3_ST_SW_SRVR_DONE_B (0x171|SSL_ST_ACCEPT)
610 /* read from client */
611 #define SSL3_ST_SR_CERT_A (0x180|SSL_ST_ACCEPT)
612 #define SSL3_ST_SR_CERT_B (0x181|SSL_ST_ACCEPT)
613 #define SSL3_ST_SR_KEY_EXCH_A (0x190|SSL_ST_ACCEPT)
614 #define SSL3_ST_SR_KEY_EXCH_B (0x191|SSL_ST_ACCEPT)
615 #define SSL3_ST_SR_CERT_VRFY_A (0x1A0|SSL_ST_ACCEPT)
616 #define SSL3_ST_SR_CERT_VRFY_B (0x1A1|SSL_ST_ACCEPT)
617 #define SSL3_ST_SR_CHANGE (0x1B0|SSL_ST_ACCEPT)
618 #define SSL3_ST_SR_NEXT_PROTO_A (0x210|SSL_ST_ACCEPT)
619 #define SSL3_ST_SR_NEXT_PROTO_B (0x211|SSL_ST_ACCEPT)
620 #define SSL3_ST_SR_CHANNEL_ID_A (0x230|SSL_ST_ACCEPT)
621 #define SSL3_ST_SR_CHANNEL_ID_B (0x231|SSL_ST_ACCEPT)
622 #define SSL3_ST_SR_FINISHED_A (0x1C0|SSL_ST_ACCEPT)
623 #define SSL3_ST_SR_FINISHED_B (0x1C1|SSL_ST_ACCEPT)
624 /* write to client */
625 #define SSL3_ST_SW_CHANGE_A (0x1D0|SSL_ST_ACCEPT)
626 #define SSL3_ST_SW_CHANGE_B (0x1D1|SSL_ST_ACCEPT)
627 #define SSL3_ST_SW_FINISHED_A (0x1E0|SSL_ST_ACCEPT)
628 #define SSL3_ST_SW_FINISHED_B (0x1E1|SSL_ST_ACCEPT)
629 #define SSL3_ST_SW_SESSION_TICKET_A (0x1F0|SSL_ST_ACCEPT)
630 #define SSL3_ST_SW_SESSION_TICKET_B (0x1F1|SSL_ST_ACCEPT)
631 #define SSL3_ST_SW_CERT_STATUS_A (0x200|SSL_ST_ACCEPT)
632 #define SSL3_ST_SW_CERT_STATUS_B (0x201|SSL_ST_ACCEPT)
633 #define SSL3_ST_SW_SUPPLEMENTAL_DATA_A (0x220|SSL_ST_ACCEPT)
634 #define SSL3_ST_SW_SUPPLEMENTAL_DATA_B (0x221|SSL_ST_ACCEPT)
636 #define SSL3_MT_HELLO_REQUEST 0
637 #define SSL3_MT_CLIENT_HELLO 1
638 #define SSL3_MT_SERVER_HELLO 2
639 #define SSL3_MT_NEWSESSION_TICKET 4
640 #define SSL3_MT_CERTIFICATE 11
641 #define SSL3_MT_SERVER_KEY_EXCHANGE 12
642 #define SSL3_MT_CERTIFICATE_REQUEST 13
643 #define SSL3_MT_SERVER_DONE 14
644 #define SSL3_MT_CERTIFICATE_VERIFY 15
645 #define SSL3_MT_CLIENT_KEY_EXCHANGE 16
646 #define SSL3_MT_FINISHED 20
647 #define SSL3_MT_CERTIFICATE_STATUS 22
648 #define SSL3_MT_SUPPLEMENTAL_DATA 23
649 #define SSL3_MT_NEXT_PROTO 67
650 #define SSL3_MT_ENCRYPTED_EXTENSIONS 203
651 #define DTLS1_MT_HELLO_VERIFY_REQUEST 3
654 #define SSL3_MT_CCS 1
656 /* These are used when changing over to a new cipher */
657 #define SSL3_CC_READ 0x01
658 #define SSL3_CC_WRITE 0x02
659 #define SSL3_CC_CLIENT 0x10
660 #define SSL3_CC_SERVER 0x20
661 #define SSL3_CHANGE_CIPHER_CLIENT_WRITE (SSL3_CC_CLIENT|SSL3_CC_WRITE)
662 #define SSL3_CHANGE_CIPHER_SERVER_READ (SSL3_CC_SERVER|SSL3_CC_READ)
663 #define SSL3_CHANGE_CIPHER_CLIENT_READ (SSL3_CC_CLIENT|SSL3_CC_READ)
664 #define SSL3_CHANGE_CIPHER_SERVER_WRITE (SSL3_CC_SERVER|SSL3_CC_WRITE)