2 * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the OpenSSL license (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
10 /* ====================================================================
11 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
12 * ECC cipher suite support in OpenSSL originally developed by
13 * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
15 /* ====================================================================
16 * Copyright 2005 Nokia. All rights reserved.
18 * The portions of the attached software ("Contribution") is developed by
19 * Nokia Corporation and is licensed pursuant to the OpenSSL open source
22 * The Contribution, originally written by Mika Kousa and Pasi Eronen of
23 * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
24 * support (see RFC 4279) to OpenSSL.
26 * No patent licenses or other rights except those expressly stated in
27 * the OpenSSL open source license shall be deemed granted or received
28 * expressly, by implication, estoppel, or otherwise.
30 * No assurances are provided by Nokia that the Contribution does not
31 * infringe the patent or other intellectual property rights of any third
32 * party or that the license provides you with all the necessary rights
33 * to make use of the Contribution.
35 * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
36 * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
37 * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
38 * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
42 #ifndef HEADER_SSL_LOCL_H
43 # define HEADER_SSL_LOCL_H
50 # if defined(__unix) || defined(__unix__)
51 # include <sys/time.h> /* struct timeval for DTLS */
54 # include <openssl/buffer.h>
55 # include <openssl/comp.h>
56 # include <openssl/bio.h>
57 # include <openssl/stack.h>
58 # include <openssl/rsa.h>
59 # include <openssl/dsa.h>
60 # include <openssl/err.h>
61 # include <openssl/ssl.h>
62 # include <openssl/async.h>
63 # include <openssl/symhacks.h>
64 # include <openssl/ct.h>
65 # include "record/record.h"
66 # include "statem/statem.h"
67 # include "packet_locl.h"
68 # include "internal/dane.h"
69 # include "internal/refcount.h"
71 # ifdef OPENSSL_BUILD_SHLIBSSL
72 # undef OPENSSL_EXTERN
73 # define OPENSSL_EXTERN OPENSSL_EXPORT
76 # define c2l(c,l) (l = ((unsigned long)(*((c)++))) , \
77 l|=(((unsigned long)(*((c)++)))<< 8), \
78 l|=(((unsigned long)(*((c)++)))<<16), \
79 l|=(((unsigned long)(*((c)++)))<<24))
81 /* NOTE - c is not incremented as per c2l */
82 # define c2ln(c,l1,l2,n) { \
86 case 8: l2 =((unsigned long)(*(--(c))))<<24; \
87 case 7: l2|=((unsigned long)(*(--(c))))<<16; \
88 case 6: l2|=((unsigned long)(*(--(c))))<< 8; \
89 case 5: l2|=((unsigned long)(*(--(c)))); \
90 case 4: l1 =((unsigned long)(*(--(c))))<<24; \
91 case 3: l1|=((unsigned long)(*(--(c))))<<16; \
92 case 2: l1|=((unsigned long)(*(--(c))))<< 8; \
93 case 1: l1|=((unsigned long)(*(--(c)))); \
97 # define l2c(l,c) (*((c)++)=(unsigned char)(((l) )&0xff), \
98 *((c)++)=(unsigned char)(((l)>> 8)&0xff), \
99 *((c)++)=(unsigned char)(((l)>>16)&0xff), \
100 *((c)++)=(unsigned char)(((l)>>24)&0xff))
102 # define n2l(c,l) (l =((unsigned long)(*((c)++)))<<24, \
103 l|=((unsigned long)(*((c)++)))<<16, \
104 l|=((unsigned long)(*((c)++)))<< 8, \
105 l|=((unsigned long)(*((c)++))))
107 # define n2l8(c,l) (l =((uint64_t)(*((c)++)))<<56, \
108 l|=((uint64_t)(*((c)++)))<<48, \
109 l|=((uint64_t)(*((c)++)))<<40, \
110 l|=((uint64_t)(*((c)++)))<<32, \
111 l|=((uint64_t)(*((c)++)))<<24, \
112 l|=((uint64_t)(*((c)++)))<<16, \
113 l|=((uint64_t)(*((c)++)))<< 8, \
114 l|=((uint64_t)(*((c)++))))
117 # define l2n(l,c) (*((c)++)=(unsigned char)(((l)>>24)&0xff), \
118 *((c)++)=(unsigned char)(((l)>>16)&0xff), \
119 *((c)++)=(unsigned char)(((l)>> 8)&0xff), \
120 *((c)++)=(unsigned char)(((l) )&0xff))
122 # define l2n6(l,c) (*((c)++)=(unsigned char)(((l)>>40)&0xff), \
123 *((c)++)=(unsigned char)(((l)>>32)&0xff), \
124 *((c)++)=(unsigned char)(((l)>>24)&0xff), \
125 *((c)++)=(unsigned char)(((l)>>16)&0xff), \
126 *((c)++)=(unsigned char)(((l)>> 8)&0xff), \
127 *((c)++)=(unsigned char)(((l) )&0xff))
129 # define l2n8(l,c) (*((c)++)=(unsigned char)(((l)>>56)&0xff), \
130 *((c)++)=(unsigned char)(((l)>>48)&0xff), \
131 *((c)++)=(unsigned char)(((l)>>40)&0xff), \
132 *((c)++)=(unsigned char)(((l)>>32)&0xff), \
133 *((c)++)=(unsigned char)(((l)>>24)&0xff), \
134 *((c)++)=(unsigned char)(((l)>>16)&0xff), \
135 *((c)++)=(unsigned char)(((l)>> 8)&0xff), \
136 *((c)++)=(unsigned char)(((l) )&0xff))
138 /* NOTE - c is not incremented as per l2c */
139 # define l2cn(l1,l2,c,n) { \
142 case 8: *(--(c))=(unsigned char)(((l2)>>24)&0xff); \
143 case 7: *(--(c))=(unsigned char)(((l2)>>16)&0xff); \
144 case 6: *(--(c))=(unsigned char)(((l2)>> 8)&0xff); \
145 case 5: *(--(c))=(unsigned char)(((l2) )&0xff); \
146 case 4: *(--(c))=(unsigned char)(((l1)>>24)&0xff); \
147 case 3: *(--(c))=(unsigned char)(((l1)>>16)&0xff); \
148 case 2: *(--(c))=(unsigned char)(((l1)>> 8)&0xff); \
149 case 1: *(--(c))=(unsigned char)(((l1) )&0xff); \
153 # define n2s(c,s) ((s=(((unsigned int)((c)[0]))<< 8)| \
154 (((unsigned int)((c)[1])) )),(c)+=2)
155 # define s2n(s,c) (((c)[0]=(unsigned char)(((s)>> 8)&0xff), \
156 (c)[1]=(unsigned char)(((s) )&0xff)),(c)+=2)
158 # define n2l3(c,l) ((l =(((unsigned long)((c)[0]))<<16)| \
159 (((unsigned long)((c)[1]))<< 8)| \
160 (((unsigned long)((c)[2])) )),(c)+=3)
162 # define l2n3(l,c) (((c)[0]=(unsigned char)(((l)>>16)&0xff), \
163 (c)[1]=(unsigned char)(((l)>> 8)&0xff), \
164 (c)[2]=(unsigned char)(((l) )&0xff)),(c)+=3)
167 * DTLS version numbers are strange because they're inverted. Except for
168 * DTLS1_BAD_VER, which should be considered "lower" than the rest.
170 # define dtls_ver_ordinal(v1) (((v1) == DTLS1_BAD_VER) ? 0xff00 : (v1))
171 # define DTLS_VERSION_GT(v1, v2) (dtls_ver_ordinal(v1) < dtls_ver_ordinal(v2))
172 # define DTLS_VERSION_GE(v1, v2) (dtls_ver_ordinal(v1) <= dtls_ver_ordinal(v2))
173 # define DTLS_VERSION_LT(v1, v2) (dtls_ver_ordinal(v1) > dtls_ver_ordinal(v2))
174 # define DTLS_VERSION_LE(v1, v2) (dtls_ver_ordinal(v1) >= dtls_ver_ordinal(v2))
178 * Define the Bitmasks for SSL_CIPHER.algorithms.
179 * This bits are used packed as dense as possible. If new methods/ciphers
180 * etc will be added, the bits a likely to change, so this information
181 * is for internal library use only, even though SSL_CIPHER.algorithms
182 * can be publicly accessed.
183 * Use the according functions for cipher management instead.
185 * The bit mask handling in the selection and sorting scheme in
186 * ssl_create_cipher_list() has only limited capabilities, reflecting
187 * that the different entities within are mutually exclusive:
188 * ONLY ONE BIT PER MASK CAN BE SET AT A TIME.
191 /* Bits for algorithm_mkey (key exchange algorithm) */
192 /* RSA key exchange */
193 # define SSL_kRSA 0x00000001U
194 /* tmp DH key no DH cert */
195 # define SSL_kDHE 0x00000002U
197 # define SSL_kEDH SSL_kDHE
199 # define SSL_kECDHE 0x00000004U
201 # define SSL_kEECDH SSL_kECDHE
203 # define SSL_kPSK 0x00000008U
204 /* GOST key exchange */
205 # define SSL_kGOST 0x00000010U
207 # define SSL_kSRP 0x00000020U
209 # define SSL_kRSAPSK 0x00000040U
210 # define SSL_kECDHEPSK 0x00000080U
211 # define SSL_kDHEPSK 0x00000100U
215 # define SSL_PSK (SSL_kPSK | SSL_kRSAPSK | SSL_kECDHEPSK | SSL_kDHEPSK)
217 /* Any appropriate key exchange algorithm (for TLS 1.3 ciphersuites) */
218 # define SSL_kANY 0x00000000U
220 /* Bits for algorithm_auth (server authentication) */
222 # define SSL_aRSA 0x00000001U
224 # define SSL_aDSS 0x00000002U
225 /* no auth (i.e. use ADH or AECDH) */
226 # define SSL_aNULL 0x00000004U
228 # define SSL_aECDSA 0x00000008U
230 # define SSL_aPSK 0x00000010U
231 /* GOST R 34.10-2001 signature auth */
232 # define SSL_aGOST01 0x00000020U
234 # define SSL_aSRP 0x00000040U
235 /* GOST R 34.10-2012 signature auth */
236 # define SSL_aGOST12 0x00000080U
237 /* Any appropriate signature auth (for TLS 1.3 ciphersuites) */
238 # define SSL_aANY 0x00000000U
240 /* Bits for algorithm_enc (symmetric encryption) */
241 # define SSL_DES 0x00000001U
242 # define SSL_3DES 0x00000002U
243 # define SSL_RC4 0x00000004U
244 # define SSL_RC2 0x00000008U
245 # define SSL_IDEA 0x00000010U
246 # define SSL_eNULL 0x00000020U
247 # define SSL_AES128 0x00000040U
248 # define SSL_AES256 0x00000080U
249 # define SSL_CAMELLIA128 0x00000100U
250 # define SSL_CAMELLIA256 0x00000200U
251 # define SSL_eGOST2814789CNT 0x00000400U
252 # define SSL_SEED 0x00000800U
253 # define SSL_AES128GCM 0x00001000U
254 # define SSL_AES256GCM 0x00002000U
255 # define SSL_AES128CCM 0x00004000U
256 # define SSL_AES256CCM 0x00008000U
257 # define SSL_AES128CCM8 0x00010000U
258 # define SSL_AES256CCM8 0x00020000U
259 # define SSL_eGOST2814789CNT12 0x00040000U
260 # define SSL_CHACHA20POLY1305 0x00080000U
262 # define SSL_AESGCM (SSL_AES128GCM | SSL_AES256GCM)
263 # define SSL_AESCCM (SSL_AES128CCM | SSL_AES256CCM | SSL_AES128CCM8 | SSL_AES256CCM8)
264 # define SSL_AES (SSL_AES128|SSL_AES256|SSL_AESGCM|SSL_AESCCM)
265 # define SSL_CAMELLIA (SSL_CAMELLIA128|SSL_CAMELLIA256)
266 # define SSL_CHACHA20 (SSL_CHACHA20POLY1305)
268 /* Bits for algorithm_mac (symmetric authentication) */
270 # define SSL_MD5 0x00000001U
271 # define SSL_SHA1 0x00000002U
272 # define SSL_GOST94 0x00000004U
273 # define SSL_GOST89MAC 0x00000008U
274 # define SSL_SHA256 0x00000010U
275 # define SSL_SHA384 0x00000020U
276 /* Not a real MAC, just an indication it is part of cipher */
277 # define SSL_AEAD 0x00000040U
278 # define SSL_GOST12_256 0x00000080U
279 # define SSL_GOST89MAC12 0x00000100U
280 # define SSL_GOST12_512 0x00000200U
283 * When adding new digest in the ssl_ciph.c and increment SSL_MD_NUM_IDX make
284 * sure to update this constant too
287 # define SSL_MD_MD5_IDX 0
288 # define SSL_MD_SHA1_IDX 1
289 # define SSL_MD_GOST94_IDX 2
290 # define SSL_MD_GOST89MAC_IDX 3
291 # define SSL_MD_SHA256_IDX 4
292 # define SSL_MD_SHA384_IDX 5
293 # define SSL_MD_GOST12_256_IDX 6
294 # define SSL_MD_GOST89MAC12_IDX 7
295 # define SSL_MD_GOST12_512_IDX 8
296 # define SSL_MD_MD5_SHA1_IDX 9
297 # define SSL_MD_SHA224_IDX 10
298 # define SSL_MD_SHA512_IDX 11
299 # define SSL_MAX_DIGEST 12
301 /* Bits for algorithm2 (handshake digests and other extra flags) */
303 /* Bits 0-7 are handshake MAC */
304 # define SSL_HANDSHAKE_MAC_MASK 0xFF
305 # define SSL_HANDSHAKE_MAC_MD5_SHA1 SSL_MD_MD5_SHA1_IDX
306 # define SSL_HANDSHAKE_MAC_SHA256 SSL_MD_SHA256_IDX
307 # define SSL_HANDSHAKE_MAC_SHA384 SSL_MD_SHA384_IDX
308 # define SSL_HANDSHAKE_MAC_GOST94 SSL_MD_GOST94_IDX
309 # define SSL_HANDSHAKE_MAC_GOST12_256 SSL_MD_GOST12_256_IDX
310 # define SSL_HANDSHAKE_MAC_GOST12_512 SSL_MD_GOST12_512_IDX
311 # define SSL_HANDSHAKE_MAC_DEFAULT SSL_HANDSHAKE_MAC_MD5_SHA1
313 /* Bits 8-15 bits are PRF */
314 # define TLS1_PRF_DGST_SHIFT 8
315 # define TLS1_PRF_SHA1_MD5 (SSL_MD_MD5_SHA1_IDX << TLS1_PRF_DGST_SHIFT)
316 # define TLS1_PRF_SHA256 (SSL_MD_SHA256_IDX << TLS1_PRF_DGST_SHIFT)
317 # define TLS1_PRF_SHA384 (SSL_MD_SHA384_IDX << TLS1_PRF_DGST_SHIFT)
318 # define TLS1_PRF_GOST94 (SSL_MD_GOST94_IDX << TLS1_PRF_DGST_SHIFT)
319 # define TLS1_PRF_GOST12_256 (SSL_MD_GOST12_256_IDX << TLS1_PRF_DGST_SHIFT)
320 # define TLS1_PRF_GOST12_512 (SSL_MD_GOST12_512_IDX << TLS1_PRF_DGST_SHIFT)
321 # define TLS1_PRF (SSL_MD_MD5_SHA1_IDX << TLS1_PRF_DGST_SHIFT)
324 * Stream MAC for GOST ciphersuites from cryptopro draft (currently this also
325 * goes into algorithm2)
327 # define TLS1_STREAM_MAC 0x10000
329 # define SSL_STRONG_MASK 0x0000001FU
330 # define SSL_DEFAULT_MASK 0X00000020U
332 # define SSL_STRONG_NONE 0x00000001U
333 # define SSL_LOW 0x00000002U
334 # define SSL_MEDIUM 0x00000004U
335 # define SSL_HIGH 0x00000008U
336 # define SSL_FIPS 0x00000010U
337 # define SSL_NOT_DEFAULT 0x00000020U
339 /* we have used 0000003f - 26 bits left to go */
341 /* Flag used on OpenSSL ciphersuite ids to indicate they are for SSLv3+ */
342 # define SSL3_CK_CIPHERSUITE_FLAG 0x03000000
344 /* Check if an SSL structure is using DTLS */
345 # define SSL_IS_DTLS(s) (s->method->ssl3_enc->enc_flags & SSL_ENC_FLAG_DTLS)
347 /* Check if we are using TLSv1.3 */
348 # define SSL_IS_TLS13(s) (!SSL_IS_DTLS(s) \
349 && (s)->method->version >= TLS1_3_VERSION \
350 && (s)->method->version != TLS_ANY_VERSION)
352 # define SSL_IS_FIRST_HANDSHAKE(S) ((s)->s3->tmp.finish_md_len == 0)
354 /* See if we need explicit IV */
355 # define SSL_USE_EXPLICIT_IV(s) \
356 (s->method->ssl3_enc->enc_flags & SSL_ENC_FLAG_EXPLICIT_IV)
358 * See if we use signature algorithms extension and signature algorithm
361 # define SSL_USE_SIGALGS(s) \
362 (s->method->ssl3_enc->enc_flags & SSL_ENC_FLAG_SIGALGS)
364 * Allow TLS 1.2 ciphersuites: applies to DTLS 1.2 as well as TLS 1.2: may
365 * apply to others in future.
367 # define SSL_USE_TLS1_2_CIPHERS(s) \
368 (s->method->ssl3_enc->enc_flags & SSL_ENC_FLAG_TLS1_2_CIPHERS)
370 * Determine if a client can use TLS 1.2 ciphersuites: can't rely on method
371 * flags because it may not be set to correct version yet.
373 # define SSL_CLIENT_USE_TLS1_2_CIPHERS(s) \
374 ((!SSL_IS_DTLS(s) && s->client_version >= TLS1_2_VERSION) || \
375 (SSL_IS_DTLS(s) && DTLS_VERSION_GE(s->client_version, DTLS1_2_VERSION)))
377 * Determine if a client should send signature algorithms extension:
378 * as with TLS1.2 cipher we can't rely on method flags.
380 # define SSL_CLIENT_USE_SIGALGS(s) \
381 SSL_CLIENT_USE_TLS1_2_CIPHERS(s)
383 # define SSL_READ_ETM(s) (s->s3->flags & TLS1_FLAGS_ENCRYPT_THEN_MAC_READ)
384 # define SSL_WRITE_ETM(s) (s->s3->flags & TLS1_FLAGS_ENCRYPT_THEN_MAC_WRITE)
386 /* Mostly for SSLv3 */
387 # define SSL_PKEY_RSA 0
388 # define SSL_PKEY_DSA_SIGN 1
389 # define SSL_PKEY_ECC 2
390 # define SSL_PKEY_GOST01 3
391 # define SSL_PKEY_GOST12_256 4
392 # define SSL_PKEY_GOST12_512 5
393 # define SSL_PKEY_NUM 6
395 * Pseudo-constant. GOST cipher suites can use different certs for 1
396 * SSL_CIPHER. So let's see which one we have in fact.
398 # define SSL_PKEY_GOST_EC SSL_PKEY_NUM+1
401 * TODO(TLS1.3) for now use SSL_PKEY_RSA keys for PSS
404 #define SSL_PKEY_RSA_PSS_SIGN SSL_PKEY_RSA
407 * SSL_kRSA <- RSA_ENC
408 * SSL_kDH <- DH_ENC & (RSA_ENC | RSA_SIGN | DSA_SIGN)
409 * SSL_kDHE <- RSA_ENC | RSA_SIGN | DSA_SIGN
410 * SSL_aRSA <- RSA_ENC | RSA_SIGN
411 * SSL_aDSS <- DSA_SIGN
415 #define CERT_INVALID 0
416 #define CERT_PUBLIC_KEY 1
417 #define CERT_PRIVATE_KEY 2
420 /* CipherSuite length. SSLv3 and all TLS versions. */
421 # define TLS_CIPHER_LEN 2
422 /* used to hold info on the particular ciphers used */
423 struct ssl_cipher_st {
425 const char *name; /* text name */
426 uint32_t id; /* id, 4 bytes, first is version */
428 * changed in 1.0.0: these four used to be portions of a single value
431 uint32_t algorithm_mkey; /* key exchange algorithm */
432 uint32_t algorithm_auth; /* server authentication */
433 uint32_t algorithm_enc; /* symmetric encryption */
434 uint32_t algorithm_mac; /* symmetric authentication */
435 int min_tls; /* minimum SSL/TLS protocol version */
436 int max_tls; /* maximum SSL/TLS protocol version */
437 int min_dtls; /* minimum DTLS protocol version */
438 int max_dtls; /* maximum DTLS protocol version */
439 uint32_t algo_strength; /* strength and export flags */
440 uint32_t algorithm2; /* Extra flags */
441 int32_t strength_bits; /* Number of bits really used */
442 uint32_t alg_bits; /* Number of bits for algorithm */
445 /* Used to hold SSL/TLS functions */
446 struct ssl_method_st {
450 int (*ssl_new) (SSL *s);
451 void (*ssl_clear) (SSL *s);
452 void (*ssl_free) (SSL *s);
453 int (*ssl_accept) (SSL *s);
454 int (*ssl_connect) (SSL *s);
455 int (*ssl_read) (SSL *s, void *buf, size_t len, size_t *readbytes);
456 int (*ssl_peek) (SSL *s, void *buf, size_t len, size_t *readbytes);
457 int (*ssl_write) (SSL *s, const void *buf, size_t len, size_t *written);
458 int (*ssl_shutdown) (SSL *s);
459 int (*ssl_renegotiate) (SSL *s);
460 int (*ssl_renegotiate_check) (SSL *s, int);
461 int (*ssl_read_bytes) (SSL *s, int type, int *recvd_type,
462 unsigned char *buf, size_t len, int peek,
464 int (*ssl_write_bytes) (SSL *s, int type, const void *buf_, size_t len,
466 int (*ssl_dispatch_alert) (SSL *s);
467 long (*ssl_ctrl) (SSL *s, int cmd, long larg, void *parg);
468 long (*ssl_ctx_ctrl) (SSL_CTX *ctx, int cmd, long larg, void *parg);
469 const SSL_CIPHER *(*get_cipher_by_char) (const unsigned char *ptr);
470 int (*put_cipher_by_char) (const SSL_CIPHER *cipher, WPACKET *pkt,
472 size_t (*ssl_pending) (const SSL *s);
473 int (*num_ciphers) (void);
474 const SSL_CIPHER *(*get_cipher) (unsigned ncipher);
475 long (*get_timeout) (void);
476 const struct ssl3_enc_method *ssl3_enc; /* Extra SSLv3/TLS stuff */
477 int (*ssl_version) (void);
478 long (*ssl_callback_ctrl) (SSL *s, int cb_id, void (*fp) (void));
479 long (*ssl_ctx_callback_ctrl) (SSL_CTX *s, int cb_id, void (*fp) (void));
483 * Lets make this into an ASN.1 type structure as follows
484 * SSL_SESSION_ID ::= SEQUENCE {
485 * version INTEGER, -- structure version number
486 * SSLversion INTEGER, -- SSL version number
487 * Cipher OCTET STRING, -- the 3 byte cipher ID
488 * Session_ID OCTET STRING, -- the Session ID
489 * Master_key OCTET STRING, -- the master key
490 * Key_Arg [ 0 ] IMPLICIT OCTET STRING, -- the optional Key argument
491 * Time [ 1 ] EXPLICIT INTEGER, -- optional Start Time
492 * Timeout [ 2 ] EXPLICIT INTEGER, -- optional Timeout ins seconds
493 * Peer [ 3 ] EXPLICIT X509, -- optional Peer Certificate
494 * Session_ID_context [ 4 ] EXPLICIT OCTET STRING, -- the Session ID context
495 * Verify_result [ 5 ] EXPLICIT INTEGER, -- X509_V_... code for `Peer'
496 * HostName [ 6 ] EXPLICIT OCTET STRING, -- optional HostName from servername TLS extension
497 * PSK_identity_hint [ 7 ] EXPLICIT OCTET STRING, -- optional PSK identity hint
498 * PSK_identity [ 8 ] EXPLICIT OCTET STRING, -- optional PSK identity
499 * Ticket_lifetime_hint [9] EXPLICIT INTEGER, -- server's lifetime hint for session ticket
500 * Ticket [10] EXPLICIT OCTET STRING, -- session ticket (clients only)
501 * Compression_meth [11] EXPLICIT OCTET STRING, -- optional compression method
502 * SRP_username [ 12 ] EXPLICIT OCTET STRING -- optional SRP username
503 * flags [ 13 ] EXPLICIT INTEGER -- optional flags
505 * Look in ssl/ssl_asn1.c for more details
506 * I'm using EXPLICIT tags so I can read the damn things using asn1parse :-).
508 struct ssl_session_st {
509 int ssl_version; /* what ssl version session info is being kept
511 size_t master_key_length;
514 * For <=TLS1.2 this is the master_key. For TLS1.3 this is the resumption
517 unsigned char master_key[TLS13_MAX_RESUMPTION_MASTER_LENGTH];
518 /* session_id - valid? */
519 size_t session_id_length;
520 unsigned char session_id[SSL_MAX_SSL_SESSION_ID_LENGTH];
522 * this is used to determine whether the session is being reused in the
523 * appropriate context. It is up to the application to set this, via
526 size_t sid_ctx_length;
527 unsigned char sid_ctx[SSL_MAX_SID_CTX_LENGTH];
528 # ifndef OPENSSL_NO_PSK
529 char *psk_identity_hint;
533 * Used to indicate that session resumption is not allowed. Applications
534 * can also set this bit for a new session via not_resumable_session_cb
535 * to disable session caching and tickets.
538 /* This is the cert and type for the other end. */
541 /* Certificate chain peer sent */
542 STACK_OF(X509) *peer_chain;
544 * when app_verify_callback accepts a session where the peer's
545 * certificate is not ok, we must remember the error for session reuse:
547 long verify_result; /* only for servers */
548 CRYPTO_REF_COUNT references;
551 unsigned int compress_meth; /* Need to lookup the method */
552 const SSL_CIPHER *cipher;
553 unsigned long cipher_id; /* when ASN.1 loaded, this needs to be used to
554 * load the 'cipher' structure */
555 STACK_OF(SSL_CIPHER) *ciphers; /* shared ciphers? */
556 CRYPTO_EX_DATA ex_data; /* application specific data */
558 * These are used to make removal of session-ids more efficient and to
559 * implement a maximum cache size.
561 struct ssl_session_st *prev, *next;
565 # ifndef OPENSSL_NO_EC
566 size_t ecpointformats_len;
567 unsigned char *ecpointformats; /* peer's list */
568 size_t supportedgroups_len;
569 unsigned char *supportedgroups; /* peer's list */
570 # endif /* OPENSSL_NO_EC */
572 unsigned char *tick; /* Session ticket */
573 size_t ticklen; /* Session ticket length */
574 /* Session lifetime hint in seconds */
575 unsigned long tick_lifetime_hint;
576 uint32_t tick_age_add;
579 # ifndef OPENSSL_NO_SRP
586 /* Extended master secret support */
587 # define SSL_SESS_FLAG_EXTMS 0x1
589 # ifndef OPENSSL_NO_SRP
591 typedef struct srp_ctx_st {
592 /* param for all the callbacks */
594 /* set client Hello login callback */
595 int (*TLS_ext_srp_username_callback) (SSL *, int *, void *);
596 /* set SRP N/g param callback for verification */
597 int (*SRP_verify_param_callback) (SSL *, void *);
598 /* set SRP client passwd callback */
599 char *(*SRP_give_srp_client_pwd_callback) (SSL *, void *);
601 BIGNUM *N, *g, *s, *B, *A;
605 unsigned long srp_Mask;
610 #define MAX_COMPRESSIONS_SIZE 255
618 typedef struct raw_extension_st {
619 /* Raw packet data for the extension */
621 /* Set to 1 if the extension is present or 0 otherwise */
623 /* Set to 1 if we have already parsed the extension or 0 otherwise */
625 /* The type of this extension, i.e. a TLSEXT_TYPE_* value */
631 unsigned int legacy_version;
632 unsigned char random[SSL3_RANDOM_SIZE];
633 size_t session_id_len;
634 unsigned char session_id[SSL_MAX_SSL_SESSION_ID_LENGTH];
635 size_t dtls_cookie_len;
636 unsigned char dtls_cookie[DTLS1_COOKIE_LENGTH];
638 size_t compressions_len;
639 unsigned char compressions[MAX_COMPRESSIONS_SIZE];
641 size_t pre_proc_exts_len;
642 RAW_EXTENSION *pre_proc_exts;
645 DEFINE_LHASH_OF(SSL_SESSION);
646 /* Needed in ssl_cert.c */
647 DEFINE_LHASH_OF(X509_NAME);
649 # define TLSEXT_KEYNAME_LENGTH 16
652 const SSL_METHOD *method;
653 STACK_OF(SSL_CIPHER) *cipher_list;
654 /* same as above but sorted for lookup */
655 STACK_OF(SSL_CIPHER) *cipher_list_by_id;
656 struct x509_store_st /* X509_STORE */ *cert_store;
657 LHASH_OF(SSL_SESSION) *sessions;
659 * Most session-ids that will be cached, default is
660 * SSL_SESSION_CACHE_MAX_SIZE_DEFAULT. 0 is unlimited.
662 size_t session_cache_size;
663 struct ssl_session_st *session_cache_head;
664 struct ssl_session_st *session_cache_tail;
666 * This can have one of 2 values, ored together, SSL_SESS_CACHE_CLIENT,
667 * SSL_SESS_CACHE_SERVER, Default is SSL_SESSION_CACHE_SERVER, which
668 * means only SSL_accept which cache SSL_SESSIONS.
670 uint32_t session_cache_mode;
672 * If timeout is not 0, it is the default timeout value set when
673 * SSL_new() is called. This has been put in to make life easier to set
676 long session_timeout;
678 * If this callback is not null, it will be called each time a session id
679 * is added to the cache. If this function returns 1, it means that the
680 * callback will do a SSL_SESSION_free() when it has finished using it.
681 * Otherwise, on 0, it means the callback has finished with it. If
682 * remove_session_cb is not null, it will be called when a session-id is
683 * removed from the cache. After the call, OpenSSL will
684 * SSL_SESSION_free() it.
686 int (*new_session_cb) (struct ssl_st *ssl, SSL_SESSION *sess);
687 void (*remove_session_cb) (struct ssl_ctx_st *ctx, SSL_SESSION *sess);
688 SSL_SESSION *(*get_session_cb) (struct ssl_st *ssl,
689 const unsigned char *data, int len,
692 int sess_connect; /* SSL new conn - started */
693 int sess_connect_renegotiate; /* SSL reneg - requested */
694 int sess_connect_good; /* SSL new conne/reneg - finished */
695 int sess_accept; /* SSL new accept - started */
696 int sess_accept_renegotiate; /* SSL reneg - requested */
697 int sess_accept_good; /* SSL accept/reneg - finished */
698 int sess_miss; /* session lookup misses */
699 int sess_timeout; /* reuse attempt on timeouted session */
700 int sess_cache_full; /* session removed due to full cache */
701 int sess_hit; /* session reuse actually done */
702 int sess_cb_hit; /* session-id that was not in the cache was
703 * passed back via the callback. This
704 * indicates that the application is supplying
705 * session-id's from other processes - spooky
709 CRYPTO_REF_COUNT references;
711 /* if defined, these override the X509_verify_cert() calls */
712 int (*app_verify_callback) (X509_STORE_CTX *, void *);
713 void *app_verify_arg;
715 * before OpenSSL 0.9.7, 'app_verify_arg' was ignored
716 * ('app_verify_callback' was called with just one argument)
719 /* Default password callback. */
720 pem_password_cb *default_passwd_callback;
722 /* Default password callback user data. */
723 void *default_passwd_callback_userdata;
725 /* get client cert callback */
726 int (*client_cert_cb) (SSL *ssl, X509 **x509, EVP_PKEY **pkey);
728 /* cookie generate callback */
729 int (*app_gen_cookie_cb) (SSL *ssl, unsigned char *cookie,
730 unsigned int *cookie_len);
732 /* verify cookie callback */
733 int (*app_verify_cookie_cb) (SSL *ssl, const unsigned char *cookie,
734 unsigned int cookie_len);
736 CRYPTO_EX_DATA ex_data;
738 const EVP_MD *md5; /* For SSLv3/TLSv1 'ssl3-md5' */
739 const EVP_MD *sha1; /* For SSLv3/TLSv1 'ssl3->sha1' */
741 STACK_OF(X509) *extra_certs;
742 STACK_OF(SSL_COMP) *comp_methods; /* stack of SSL_COMP, SSLv3/TLSv1 */
744 /* Default values used when no per-SSL value is defined follow */
746 /* used if SSL's info_callback is NULL */
747 void (*info_callback) (const SSL *ssl, int type, int val);
749 /* what we put in client cert requests */
750 STACK_OF(X509_NAME) *client_CA;
753 * Default values to use in SSL structures follow (these are copied by
759 int min_proto_version;
760 int max_proto_version;
761 size_t max_cert_list;
763 struct cert_st /* CERT */ *cert;
766 /* callback that allows applications to peek at protocol messages */
767 void (*msg_callback) (int write_p, int version, int content_type,
768 const void *buf, size_t len, SSL *ssl, void *arg);
769 void *msg_callback_arg;
771 uint32_t verify_mode;
772 size_t sid_ctx_length;
773 unsigned char sid_ctx[SSL_MAX_SID_CTX_LENGTH];
774 /* called 'verify_callback' in the SSL */
775 int (*default_verify_callback) (int ok, X509_STORE_CTX *ctx);
777 /* Default generate session ID callback. */
778 GEN_SESSION_CB generate_session_id;
780 X509_VERIFY_PARAM *param;
784 # ifndef OPENSSL_NO_CT
785 CTLOG_STORE *ctlog_store; /* CT Log Store */
787 * Validates that the SCTs (Signed Certificate Timestamps) are sufficient.
788 * If they are not, the connection should be aborted.
790 ssl_ct_validation_cb ct_validation_callback;
791 void *ct_validation_callback_arg;
795 * If we're using more than one pipeline how should we divide the data
796 * up between the pipes?
798 size_t split_send_fragment;
800 * Maximum amount of data to send in one fragment. actual record size can
801 * be more than this due to padding and MAC overheads.
803 size_t max_send_fragment;
805 /* Up to how many pipelines should we use? If 0 then 1 is assumed */
806 size_t max_pipelines;
808 /* The default read buffer length to use (0 means not set) */
809 size_t default_read_buf_len;
811 # ifndef OPENSSL_NO_ENGINE
813 * Engine to pass requests for client certs to
815 ENGINE *client_cert_engine;
818 /* Early callback. Mostly for extensions, but not entirely. */
819 SSL_early_cb_fn early_cb;
822 /* TLS extensions. */
824 /* TLS extensions servername callback */
825 int (*servername_cb) (SSL *, int *, void *);
826 void *servername_arg;
827 /* RFC 4507 session ticket keys */
828 unsigned char tick_key_name[TLSEXT_KEYNAME_LENGTH];
829 unsigned char tick_hmac_key[32];
830 unsigned char tick_aes_key[32];
831 /* Callback to support customisation of ticket key setting */
832 int (*ticket_key_cb) (SSL *ssl,
833 unsigned char *name, unsigned char *iv,
834 EVP_CIPHER_CTX *ectx, HMAC_CTX *hctx, int enc);
836 /* certificate status request info */
837 /* Callback for status request */
838 int (*status_cb) (SSL *ssl, void *arg);
840 /* ext status type used for CSR extension (OCSP Stapling) */
843 # ifndef OPENSSL_NO_EC
844 /* EC extension values inherited by SSL structure */
845 size_t ecpointformats_len;
846 unsigned char *ecpointformats;
847 size_t supportedgroups_len;
848 unsigned char *supportedgroups;
849 # endif /* OPENSSL_NO_EC */
852 * ALPN information (we are in the process of transitioning from NPN to
857 * For a server, this contains a callback function that allows the
858 * server to select the protocol for the connection.
859 * out: on successful return, this must point to the raw protocol
860 * name (without the length prefix).
861 * outlen: on successful return, this contains the length of |*out|.
862 * in: points to the client's list of supported protocols in
864 * inlen: the length of |in|.
866 int (*alpn_select_cb) (SSL *s,
867 const unsigned char **out,
868 unsigned char *outlen,
869 const unsigned char *in,
870 unsigned int inlen, void *arg);
871 void *alpn_select_cb_arg;
874 * For a client, this contains the list of supported protocols in wire
880 # ifndef OPENSSL_NO_NEXTPROTONEG
881 /* Next protocol negotiation information */
884 * For a server, this contains a callback function by which the set of
885 * advertised protocols can be provided.
887 SSL_CTX_npn_advertised_cb_func npn_advertised_cb;
888 void *npn_advertised_cb_arg;
890 * For a client, this contains a callback function that selects the next
891 * protocol from the list provided by the server.
893 SSL_CTX_npn_select_cb_func npn_select_cb;
894 void *npn_select_cb_arg;
898 # ifndef OPENSSL_NO_PSK
899 SSL_psk_client_cb_func psk_client_callback;
900 SSL_psk_server_cb_func psk_server_callback;
903 # ifndef OPENSSL_NO_SRP
904 SRP_CTX srp_ctx; /* ctx for SRP authentication */
907 /* Shared DANE context */
908 struct dane_ctx_st dane;
910 /* SRTP profiles we are willing to do from RFC 5764 */
911 STACK_OF(SRTP_PROTECTION_PROFILE) *srtp_profiles;
913 * Callback for disabling session caching and ticket support on a session
914 * basis, depending on the chosen cipher.
916 int (*not_resumable_session_cb) (SSL *ssl, int is_forward_secure);
921 * Callback for logging key material for use with debugging tools like
922 * Wireshark. The callback should log `line` followed by a newline.
924 SSL_CTX_keylog_cb_func keylog_callback;
929 * protocol version (one of SSL2_VERSION, SSL3_VERSION, TLS1_VERSION,
934 const SSL_METHOD *method;
936 * There are 2 BIO's even though they are normally both the same. This
937 * is so data can be read and written to different handlers
939 /* used by SSL_read */
941 /* used by SSL_write */
943 /* used during session-id reuse to concatenate messages */
946 * This holds a variable that indicates what we were doing when a 0 or -1
947 * is returned. This is needed for non-blocking IO so we know what
948 * request needs re-doing when in SSL_accept or SSL_connect
951 int (*handshake_func) (SSL *);
953 * Imagine that here's a boolean member "init" that is switched as soon
954 * as SSL_set_{accept/connect}_state is called for the first time, so
955 * that "state" and "handshake_func" are properly initialized. But as
956 * handshake_func is == 0 until then, we use this test instead of an
959 /* are we the server side? */
962 * Generate a new session or reuse an old one.
963 * NB: For servers, the 'new' session may actually be a previously
964 * cached session or even the previous session unless
965 * SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION is set
968 /* don't send shutdown packets */
970 /* we have shut things down, 0x01 sent, 0x02 for received */
974 BUF_MEM *init_buf; /* buffer used during init */
975 void *init_msg; /* pointer to handshake message body, set by
976 * ssl3_get_message() */
977 size_t init_num; /* amount read/written */
978 size_t init_off; /* amount read/written */
979 struct ssl3_state_st *s3; /* SSLv3 variables */
980 struct dtls1_state_st *d1; /* DTLSv1 variables */
981 /* callback that allows applications to peek at protocol messages */
982 void (*msg_callback) (int write_p, int version, int content_type,
983 const void *buf, size_t len, SSL *ssl, void *arg);
984 void *msg_callback_arg;
985 int hit; /* reusing a previous session */
986 X509_VERIFY_PARAM *param;
987 /* Per connection DANE state */
990 STACK_OF(SSL_CIPHER) *cipher_list;
991 STACK_OF(SSL_CIPHER) *cipher_list_by_id;
993 * These are the ones being used, the ones in SSL_SESSION are the ones to
994 * be 'copied' into these ones
998 * The TLS1.3 secrets. The resumption master secret is stored in the
1001 unsigned char early_secret[EVP_MAX_MD_SIZE];
1002 unsigned char handshake_secret[EVP_MAX_MD_SIZE];
1003 unsigned char master_secret[EVP_MAX_MD_SIZE];
1004 unsigned char client_finished_secret[EVP_MAX_MD_SIZE];
1005 unsigned char server_finished_secret[EVP_MAX_MD_SIZE];
1006 unsigned char server_finished_hash[EVP_MAX_MD_SIZE];
1007 unsigned char client_app_traffic_secret[EVP_MAX_MD_SIZE];
1008 unsigned char server_app_traffic_secret[EVP_MAX_MD_SIZE];
1009 EVP_CIPHER_CTX *enc_read_ctx; /* cryptographic state */
1010 unsigned char read_iv[EVP_MAX_IV_LENGTH]; /* TLSv1.3 static read IV */
1011 EVP_MD_CTX *read_hash; /* used for mac generation */
1012 COMP_CTX *compress; /* compression */
1013 COMP_CTX *expand; /* uncompress */
1014 EVP_CIPHER_CTX *enc_write_ctx; /* cryptographic state */
1015 unsigned char write_iv[EVP_MAX_IV_LENGTH]; /* TLSv1.3 static write IV */
1016 EVP_MD_CTX *write_hash; /* used for mac generation */
1017 /* Count of how many KeyUpdate messages we have received */
1018 unsigned int key_update_count;
1021 /* This is used to hold the server certificate used */
1022 struct cert_st /* CERT */ *cert;
1025 * The hash of all messages prior to the CertificateVerify, and the length
1028 unsigned char cert_verify_hash[EVP_MAX_MD_SIZE];
1029 size_t cert_verify_hash_len;
1031 /* Flag to indicate whether we should send a HelloRetryRequest or not */
1032 int hello_retry_request;
1035 * the session_id_context is used to ensure sessions are only reused in
1036 * the appropriate context
1038 size_t sid_ctx_length;
1039 unsigned char sid_ctx[SSL_MAX_SID_CTX_LENGTH];
1040 /* This can also be in the session once a session is established */
1041 SSL_SESSION *session;
1042 /* Default generate session ID callback. */
1043 GEN_SESSION_CB generate_session_id;
1046 * 0 don't care about verify failure.
1047 * 1 fail if verify fails
1049 uint32_t verify_mode;
1050 /* fail if callback returns 0 */
1051 int (*verify_callback) (int ok, X509_STORE_CTX *ctx);
1052 /* optional informational callback */
1053 void (*info_callback) (const SSL *ssl, int type, int val);
1054 /* error bytes to be written */
1058 # ifndef OPENSSL_NO_PSK
1059 SSL_psk_client_cb_func psk_client_callback;
1060 SSL_psk_server_cb_func psk_server_callback;
1063 /* Verified chain of peer */
1064 STACK_OF(X509) *verified_chain;
1066 /* extra application data */
1067 CRYPTO_EX_DATA ex_data;
1068 /* for server side, keep the list of CA_dn we can use */
1069 STACK_OF(X509_NAME) *client_CA;
1070 CRYPTO_REF_COUNT references;
1071 /* protocol behaviour */
1075 int min_proto_version;
1076 int max_proto_version;
1077 size_t max_cert_list;
1080 * What was passed in ClientHello.legacy_version. Used for RSA pre-master
1081 * secret and SSLv3/TLS (<=1.2) rollback check
1085 * If we're using more than one pipeline how should we divide the data
1086 * up between the pipes?
1088 size_t split_send_fragment;
1090 * Maximum amount of data to send in one fragment. actual record size can
1091 * be more than this due to padding and MAC overheads.
1093 size_t max_send_fragment;
1094 /* Up to how many pipelines should we use? If 0 then 1 is assumed */
1095 size_t max_pipelines;
1098 /* TLS extension debug callback */
1099 void (*debug_cb)(SSL *s, int client_server, int type,
1100 const unsigned char *data, int len, void *arg);
1103 /* certificate status request info */
1104 /* Status type or -1 if no status type */
1106 /* Raw extension data, if seen */
1107 unsigned char *scts;
1108 /* Length of raw extension data, if seen */
1110 /* Expect OCSP CertificateStatus message */
1111 int status_expected;
1114 /* OCSP status request only */
1115 STACK_OF(OCSP_RESPID) *ids;
1116 X509_EXTENSIONS *exts;
1117 /* OCSP response received or to be sent */
1118 unsigned char *resp;
1122 /* RFC4507 session ticket expected to be received or sent */
1123 int ticket_expected;
1124 # ifndef OPENSSL_NO_EC
1125 size_t ecpointformats_len;
1127 unsigned char *ecpointformats;
1128 size_t supportedgroups_len;
1130 unsigned char *supportedgroups;
1131 # endif /* OPENSSL_NO_EC */
1132 /* TLS Session Ticket extension override */
1133 TLS_SESSION_TICKET_EXT *session_ticket;
1134 /* TLS Session Ticket extension callback */
1135 tls_session_ticket_ext_cb_fn session_ticket_cb;
1136 void *session_ticket_cb_arg;
1137 /* TLS pre-shared secret session resumption */
1138 tls_session_secret_cb_fn session_secret_cb;
1139 void *session_secret_cb_arg;
1141 * For a client, this contains the list of supported protocols in wire
1144 unsigned char *alpn;
1147 * Next protocol negotiation. For the client, this is the protocol that
1148 * we sent in NextProtocol and is set when handling ServerHello
1149 * extensions. For a server, this is the client's selected_protocol from
1150 * NextProtocol and is set when handling the NextProtocol message, before
1151 * the Finished message.
1156 /* The available PSK key exchange modes */
1159 /* Set to one if we have negotiated ETM */
1163 /* Parsed form of the ClientHello, kept around across early_cb calls. */
1164 CLIENTHELLO_MSG *clienthello;
1167 * no further mod of servername
1168 * 0 : call the servername extension callback.
1169 * 1 : prepare 2, allow last ack just after in server callback.
1170 * 2 : don't call servername callback, no ack in server hello
1172 int servername_done;
1173 # ifndef OPENSSL_NO_CT
1175 * Validates that the SCTs (Signed Certificate Timestamps) are sufficient.
1176 * If they are not, the connection should be aborted.
1178 ssl_ct_validation_cb ct_validation_callback;
1179 /* User-supplied argument that is passed to the ct_validation_callback */
1180 void *ct_validation_callback_arg;
1182 * Consolidated stack of SCTs from all sources.
1183 * Lazily populated by CT_get_peer_scts(SSL*)
1185 STACK_OF(SCT) *scts;
1186 /* Have we attempted to find/parse SCTs yet? */
1189 SSL_CTX *session_ctx; /* initial ctx, used to store sessions */
1191 STACK_OF(SRTP_PROTECTION_PROFILE) *srtp_profiles;
1192 /* What's been chosen */
1193 SRTP_PROTECTION_PROFILE *srtp_profile;
1195 * 1 if we are renegotiating.
1196 * 2 if we are a server and are inside a handshake
1197 * (i.e. not just sending a HelloRequest)
1200 /* If sending a KeyUpdate is pending */
1202 # ifndef OPENSSL_NO_SRP
1203 /* ctx for SRP authentication */
1207 * Callback for disabling session caching and ticket support on a session
1208 * basis, depending on the chosen cipher.
1210 int (*not_resumable_session_cb) (SSL *ssl, int is_forward_secure);
1211 RECORD_LAYER rlayer;
1212 /* Default password callback. */
1213 pem_password_cb *default_passwd_callback;
1214 /* Default password callback user data. */
1215 void *default_passwd_callback_userdata;
1216 /* Async Job info */
1218 ASYNC_WAIT_CTX *waitctx;
1221 CRYPTO_RWLOCK *lock;
1225 * Structure containing table entry of values associated with the signature
1226 * algorithms (signature scheme) extension
1228 typedef struct sigalg_lookup_st {
1229 /* TLS 1.3 signature scheme name */
1231 /* Raw value used in extension */
1233 /* NID of hash algorithm */
1235 /* Index of hash algorithm */
1237 /* NID of signature algorithm */
1239 /* Index of signature algorithm */
1241 /* Combined hash and signature NID, if any */
1243 /* Required public key curve (ECDSA only) */
1247 typedef struct cert_pkey_st CERT_PKEY;
1249 typedef struct ssl3_state_st {
1251 size_t read_mac_secret_size;
1252 unsigned char read_mac_secret[EVP_MAX_MD_SIZE];
1253 size_t write_mac_secret_size;
1254 unsigned char write_mac_secret[EVP_MAX_MD_SIZE];
1255 unsigned char server_random[SSL3_RANDOM_SIZE];
1256 unsigned char client_random[SSL3_RANDOM_SIZE];
1257 /* flags for countermeasure against known-IV weakness */
1258 int need_empty_fragments;
1259 int empty_fragment_done;
1260 /* used during startup, digest all incoming/outgoing packets */
1261 BIO *handshake_buffer;
1263 * When handshake digest is determined, buffer is hashed and
1264 * freed and MD_CTX for the required digest is stored here.
1266 EVP_MD_CTX *handshake_dgst;
1268 * Set whenever an expected ChangeCipherSpec message is processed.
1269 * Unset when the peer's Finished message is received.
1270 * Unexpected ChangeCipherSpec messages trigger a fatal alert.
1272 int change_cipher_spec;
1276 * we allow one fatal and one warning alert to be outstanding, send close
1277 * alert via the warning alert
1280 unsigned char send_alert[2];
1282 * This flag is set when we should renegotiate ASAP, basically when there
1283 * is no more data in the read or write buffers
1286 int total_renegotiations;
1287 int num_renegotiations;
1288 int in_read_app_data;
1290 /* actually only need to be 16+20 for SSLv3 and 12 for TLS */
1291 unsigned char finish_md[EVP_MAX_MD_SIZE * 2];
1292 size_t finish_md_len;
1293 unsigned char peer_finish_md[EVP_MAX_MD_SIZE * 2];
1294 size_t peer_finish_md_len;
1295 size_t message_size;
1297 /* used to hold the new cipher we are going to use */
1298 const SSL_CIPHER *new_cipher;
1299 # if !defined(OPENSSL_NO_EC) || !defined(OPENSSL_NO_DH)
1300 EVP_PKEY *pkey; /* holds short lived DH/ECDH key */
1302 /* used for certificate requests */
1304 /* Certificate types in certificate request message. */
1307 STACK_OF(X509_NAME) *ca_names;
1308 size_t key_block_length;
1309 unsigned char *key_block;
1310 const EVP_CIPHER *new_sym_enc;
1311 const EVP_MD *new_hash;
1312 int new_mac_pkey_type;
1313 size_t new_mac_secret_size;
1314 # ifndef OPENSSL_NO_COMP
1315 const SSL_COMP *new_compression;
1317 char *new_compression;
1320 /* Raw values of the cipher list from a client */
1321 unsigned char *ciphers_raw;
1322 size_t ciphers_rawlen;
1323 /* Temporary storage for premaster secret */
1326 # ifndef OPENSSL_NO_PSK
1327 /* Temporary storage for PSK key */
1331 /* Signature algorithm we actually use */
1332 const SIGALG_LOOKUP *sigalg;
1333 /* Pointer to certificate we use */
1336 * signature algorithms peer reports: e.g. supported signature
1337 * algorithms extension for server or as part of a certificate
1338 * request for client.
1340 uint16_t *peer_sigalgs;
1341 /* Size of above array */
1342 size_t peer_sigalgslen;
1343 /* Sigalg peer actualy uses */
1344 const SIGALG_LOOKUP *peer_sigalg;
1346 * Set if corresponding CERT_PKEY can be used with current
1347 * SSL session: e.g. appropriate curve, signature algorithms etc.
1348 * If zero it can't be used at all.
1350 uint32_t valid_flags[SSL_PKEY_NUM];
1352 * For servers the following masks are for the key and auth algorithms
1353 * that are supported by the certs below. For clients they are masks of
1354 * *disabled* algorithms based on the current session.
1359 * The following are used by the client to see if a cipher is allowed or
1360 * not. It contains the minimum and maximum version the client's using
1361 * based on what it knows so far.
1367 /* Connection binding to prevent renegotiation attacks */
1368 unsigned char previous_client_finished[EVP_MAX_MD_SIZE];
1369 size_t previous_client_finished_len;
1370 unsigned char previous_server_finished[EVP_MAX_MD_SIZE];
1371 size_t previous_server_finished_len;
1372 int send_connection_binding; /* TODOEKR */
1374 # ifndef OPENSSL_NO_NEXTPROTONEG
1376 * Set if we saw the Next Protocol Negotiation extension from our peer.
1382 * ALPN information (we are in the process of transitioning from NPN to
1387 * In a server these point to the selected ALPN protocol after the
1388 * ClientHello has been processed. In a client these contain the protocol
1389 * that the server selected once the ServerHello has been processed.
1391 unsigned char *alpn_selected;
1392 size_t alpn_selected_len;
1393 /* used by the server to know what options were proposed */
1394 unsigned char *alpn_proposed;
1395 size_t alpn_proposed_len;
1396 /* used by the client to know if it actually sent alpn */
1399 # ifndef OPENSSL_NO_EC
1401 * This is set to true if we believe that this is a version of Safari
1402 * running on OS X 10.6 or newer. We wish to know this because Safari on
1403 * 10.8 .. 10.8.3 has broken ECDHE-ECDSA support.
1405 char is_probably_safari;
1406 # endif /* !OPENSSL_NO_EC */
1408 /* For clients: peer temporary key */
1409 # if !defined(OPENSSL_NO_EC) || !defined(OPENSSL_NO_DH)
1410 /* The group_id for the DH/ECDH key */
1411 unsigned int group_id;
1417 /* DTLS structures */
1419 # ifndef OPENSSL_NO_SCTP
1420 # define DTLS1_SCTP_AUTH_LABEL "EXPORTER_DTLS_OVER_SCTP"
1423 /* Max MTU overhead we know about so far is 40 for IPv6 + 8 for UDP */
1424 # define DTLS1_MAX_MTU_OVERHEAD 48
1427 * Flag used in message reuse to indicate the buffer contains the record
1428 * header as well as the the handshake message header.
1430 # define DTLS1_SKIP_RECORD_HEADER 2
1432 struct dtls1_retransmit_state {
1433 EVP_CIPHER_CTX *enc_write_ctx; /* cryptographic state */
1434 EVP_MD_CTX *write_hash; /* used for mac generation */
1435 COMP_CTX *compress; /* compression */
1436 SSL_SESSION *session;
1437 unsigned short epoch;
1440 struct hm_header_st {
1446 unsigned int is_ccs;
1447 struct dtls1_retransmit_state saved_retransmit_state;
1450 struct dtls1_timeout_st {
1451 /* Number of read timeouts so far */
1452 unsigned int read_timeouts;
1453 /* Number of write timeouts so far */
1454 unsigned int write_timeouts;
1455 /* Number of alerts received so far */
1456 unsigned int num_alerts;
1459 typedef struct hm_fragment_st {
1460 struct hm_header_st msg_header;
1461 unsigned char *fragment;
1462 unsigned char *reassembly;
1465 typedef struct pqueue_st pqueue;
1466 typedef struct pitem_st pitem;
1469 unsigned char priority[8]; /* 64-bit value in big-endian encoding */
1474 typedef struct pitem_st *piterator;
1476 pitem *pitem_new(unsigned char *prio64be, void *data);
1477 void pitem_free(pitem *item);
1478 pqueue *pqueue_new(void);
1479 void pqueue_free(pqueue *pq);
1480 pitem *pqueue_insert(pqueue *pq, pitem *item);
1481 pitem *pqueue_peek(pqueue *pq);
1482 pitem *pqueue_pop(pqueue *pq);
1483 pitem *pqueue_find(pqueue *pq, unsigned char *prio64be);
1484 pitem *pqueue_iterator(pqueue *pq);
1485 pitem *pqueue_next(piterator *iter);
1486 size_t pqueue_size(pqueue *pq);
1488 typedef struct dtls1_state_st {
1489 unsigned char cookie[DTLS1_COOKIE_LENGTH];
1491 unsigned int cookie_verified;
1492 /* handshake message numbers */
1493 unsigned short handshake_write_seq;
1494 unsigned short next_handshake_write_seq;
1495 unsigned short handshake_read_seq;
1496 /* Buffered handshake messages */
1497 pqueue *buffered_messages;
1498 /* Buffered (sent) handshake records */
1499 pqueue *sent_messages;
1500 size_t link_mtu; /* max on-the-wire DTLS packet size */
1501 size_t mtu; /* max DTLS packet size */
1502 struct hm_header_st w_msg_hdr;
1503 struct hm_header_st r_msg_hdr;
1504 struct dtls1_timeout_st timeout;
1506 * Indicates when the last handshake msg sent will timeout
1508 struct timeval next_timeout;
1509 /* Timeout duration */
1510 unsigned short timeout_duration;
1511 unsigned int retransmitting;
1512 # ifndef OPENSSL_NO_SCTP
1513 int shutdown_received;
1517 # ifndef OPENSSL_NO_EC
1519 * From ECC-TLS draft, used in encoding the curve type in ECParameters
1521 # define EXPLICIT_PRIME_CURVE_TYPE 1
1522 # define EXPLICIT_CHAR2_CURVE_TYPE 2
1523 # define NAMED_CURVE_TYPE 3
1524 # endif /* OPENSSL_NO_EC */
1526 struct cert_pkey_st {
1528 EVP_PKEY *privatekey;
1529 /* Chain for this certificate */
1530 STACK_OF(X509) *chain;
1532 * serverinfo data for this certificate. The data is in TLS Extension
1533 * wire format, specifically it's a series of records like:
1534 * uint16_t extension_type; // (RFC 5246, 7.4.1.4, Extension)
1536 * uint8_t data[length];
1538 unsigned char *serverinfo;
1539 size_t serverinfo_length;
1541 /* Retrieve Suite B flags */
1542 # define tls1_suiteb(s) (s->cert->cert_flags & SSL_CERT_FLAG_SUITEB_128_LOS)
1543 /* Uses to check strict mode: suite B modes are always strict */
1544 # define SSL_CERT_FLAGS_CHECK_TLS_STRICT \
1545 (SSL_CERT_FLAG_SUITEB_128_LOS|SSL_CERT_FLAG_TLS_STRICT)
1548 unsigned short ext_type;
1550 * Per-connection flags relating to this extension type: not used if
1551 * part of an SSL_CTX structure.
1554 custom_ext_add_cb add_cb;
1555 custom_ext_free_cb free_cb;
1557 custom_ext_parse_cb parse_cb;
1559 } custom_ext_method;
1561 /* ext_flags values */
1564 * Indicates an extension has been received. Used to check for unsolicited or
1565 * duplicate extensions.
1567 # define SSL_EXT_FLAG_RECEIVED 0x1
1569 * Indicates an extension has been sent: used to enable sending of
1570 * corresponding ServerHello extension.
1572 # define SSL_EXT_FLAG_SENT 0x2
1575 custom_ext_method *meths;
1577 } custom_ext_methods;
1579 typedef struct cert_st {
1580 /* Current active set */
1582 * ALWAYS points to an element of the pkeys array
1583 * Probably it would make more sense to store
1584 * an index, not a pointer.
1587 # ifndef OPENSSL_NO_DH
1589 DH *(*dh_tmp_cb) (SSL *ssl, int is_export, int keysize);
1592 /* Flags related to certificates */
1593 uint32_t cert_flags;
1594 CERT_PKEY pkeys[SSL_PKEY_NUM];
1595 /* Custom certificate types sent in certificate request message. */
1599 * supported signature algorithms. When set on a client this is sent in
1600 * the client hello as the supported signature algorithms extension. For
1601 * servers it represents the signature algorithms we are willing to use.
1603 uint16_t *conf_sigalgs;
1604 /* Size of above array */
1605 size_t conf_sigalgslen;
1607 * Client authentication signature algorithms, if not set then uses
1608 * conf_sigalgs. On servers these will be the signature algorithms sent
1609 * to the client in a certificate request for TLS 1.2. On a client this
1610 * represents the signature algorithms we are willing to use for client
1613 uint16_t *client_sigalgs;
1614 /* Size of above array */
1615 size_t client_sigalgslen;
1617 * Signature algorithms shared by client and server: cached because these
1618 * are used most often.
1620 const SIGALG_LOOKUP **shared_sigalgs;
1621 size_t shared_sigalgslen;
1623 * Certificate setup callback: if set is called whenever a certificate
1624 * may be required (client or server). the callback can then examine any
1625 * appropriate parameters and setup any certificates required. This
1626 * allows advanced applications to select certificates on the fly: for
1627 * example based on supported signature algorithms or curves.
1629 int (*cert_cb) (SSL *ssl, void *arg);
1632 * Optional X509_STORE for chain building or certificate validation If
1633 * NULL the parent SSL_CTX store is used instead.
1635 X509_STORE *chain_store;
1636 X509_STORE *verify_store;
1637 /* Custom extension methods for server and client */
1638 custom_ext_methods cli_ext;
1639 custom_ext_methods srv_ext;
1640 /* Security callback */
1641 int (*sec_cb) (const SSL *s, const SSL_CTX *ctx, int op, int bits, int nid,
1642 void *other, void *ex);
1643 /* Security level */
1646 # ifndef OPENSSL_NO_PSK
1647 /* If not NULL psk identity hint to use for servers */
1648 char *psk_identity_hint;
1650 CRYPTO_REF_COUNT references; /* >1 only if SSL_copy_session_id is used */
1651 CRYPTO_RWLOCK *lock;
1654 # define FP_ICC (int (*)(const void *,const void *))
1657 * This is for the SSLv3/TLSv1.0 differences in crypto/hash stuff It is a bit
1658 * of a mess of functions, but hell, think of it as an opaque structure :-)
1660 typedef struct ssl3_enc_method {
1661 int (*enc) (SSL *, SSL3_RECORD *, size_t, int);
1662 int (*mac) (SSL *, SSL3_RECORD *, unsigned char *, int);
1663 int (*setup_key_block) (SSL *);
1664 int (*generate_master_secret) (SSL *, unsigned char *, unsigned char *,
1666 int (*change_cipher_state) (SSL *, int);
1667 size_t (*final_finish_mac) (SSL *, const char *, size_t, unsigned char *);
1668 const char *client_finished_label;
1669 size_t client_finished_label_len;
1670 const char *server_finished_label;
1671 size_t server_finished_label_len;
1672 int (*alert_value) (int);
1673 int (*export_keying_material) (SSL *, unsigned char *, size_t,
1674 const char *, size_t,
1675 const unsigned char *, size_t,
1677 /* Various flags indicating protocol version requirements */
1679 /* Set the handshake header */
1680 int (*set_handshake_header) (SSL *s, WPACKET *pkt, int type);
1681 /* Close construction of the handshake message */
1682 int (*close_construct_packet) (SSL *s, WPACKET *pkt, int htype);
1683 /* Write out handshake message */
1684 int (*do_write) (SSL *s);
1687 # define ssl_set_handshake_header(s, pkt, htype) \
1688 s->method->ssl3_enc->set_handshake_header((s), (pkt), (htype))
1689 # define ssl_close_construct_packet(s, pkt, htype) \
1690 s->method->ssl3_enc->close_construct_packet((s), (pkt), (htype))
1691 # define ssl_do_write(s) s->method->ssl3_enc->do_write(s)
1693 /* Values for enc_flags */
1695 /* Uses explicit IV for CBC mode */
1696 # define SSL_ENC_FLAG_EXPLICIT_IV 0x1
1697 /* Uses signature algorithms extension */
1698 # define SSL_ENC_FLAG_SIGALGS 0x2
1699 /* Uses SHA256 default PRF */
1700 # define SSL_ENC_FLAG_SHA256_PRF 0x4
1702 # define SSL_ENC_FLAG_DTLS 0x8
1704 * Allow TLS 1.2 ciphersuites: applies to DTLS 1.2 as well as TLS 1.2: may
1705 * apply to others in future.
1707 # define SSL_ENC_FLAG_TLS1_2_CIPHERS 0x10
1709 # ifndef OPENSSL_NO_COMP
1710 /* Used for holding the relevant compression methods loaded into SSL_CTX */
1711 typedef struct ssl3_comp_st {
1712 int comp_id; /* The identifier byte for this compression
1714 char *name; /* Text name used for the compression type */
1715 COMP_METHOD *method; /* The method :-) */
1720 * Extension index values NOTE: Any updates to these defines should be mirrored
1721 * with equivalent updates to ext_defs in extensions.c
1723 typedef enum tlsext_index_en {
1724 TLSEXT_IDX_renegotiate,
1725 TLSEXT_IDX_server_name,
1727 TLSEXT_IDX_ec_point_formats,
1728 TLSEXT_IDX_supported_groups,
1729 TLSEXT_IDX_session_ticket,
1730 TLSEXT_IDX_signature_algorithms,
1731 TLSEXT_IDX_status_request,
1732 TLSEXT_IDX_next_proto_neg,
1733 TLSEXT_IDX_application_layer_protocol_negotiation,
1734 TLSEXT_IDX_use_srtp,
1735 TLSEXT_IDX_encrypt_then_mac,
1736 TLSEXT_IDX_signed_certificate_timestamp,
1737 TLSEXT_IDX_extended_master_secret,
1738 TLSEXT_IDX_supported_versions,
1739 TLSEXT_IDX_psk_kex_modes,
1740 TLSEXT_IDX_key_share,
1741 TLSEXT_IDX_cryptopro_bug,
1747 * Dummy status type for the status_type extension. Indicates no status type
1750 #define TLSEXT_STATUSTYPE_nothing -1
1752 /* Sigalgs values */
1753 #define TLSEXT_SIGALG_ecdsa_secp256r1_sha256 0x0403
1754 #define TLSEXT_SIGALG_ecdsa_secp384r1_sha384 0x0503
1755 #define TLSEXT_SIGALG_ecdsa_secp521r1_sha512 0x0603
1756 #define TLSEXT_SIGALG_ecdsa_sha1 0x0203
1757 #define TLSEXT_SIGALG_rsa_pss_sha256 0x0804
1758 #define TLSEXT_SIGALG_rsa_pss_sha384 0x0805
1759 #define TLSEXT_SIGALG_rsa_pss_sha512 0x0806
1760 #define TLSEXT_SIGALG_rsa_pkcs1_sha256 0x0401
1761 #define TLSEXT_SIGALG_rsa_pkcs1_sha384 0x0501
1762 #define TLSEXT_SIGALG_rsa_pkcs1_sha512 0x0601
1763 #define TLSEXT_SIGALG_rsa_pkcs1_sha1 0x0201
1764 #define TLSEXT_SIGALG_dsa_sha256 0x0402
1765 #define TLSEXT_SIGALG_dsa_sha384 0x0502
1766 #define TLSEXT_SIGALG_dsa_sha512 0x0602
1767 #define TLSEXT_SIGALG_dsa_sha1 0x0202
1768 #define TLSEXT_SIGALG_gostr34102012_256_gostr34112012_256 0xeeee
1769 #define TLSEXT_SIGALG_gostr34102012_512_gostr34112012_512 0xefef
1770 #define TLSEXT_SIGALG_gostr34102001_gostr3411 0xeded
1772 /* Known PSK key exchange modes */
1773 #define TLSEXT_KEX_MODE_KE 0x00
1774 #define TLSEXT_KEX_MODE_KE_DHE 0x01
1777 * Internal representations of key exchange modes
1779 #define TLSEXT_KEX_MODE_FLAG_NONE 0
1780 #define TLSEXT_KEX_MODE_FLAG_KE 1
1781 #define TLSEXT_KEX_MODE_FLAG_KE_DHE 2
1783 /* An invalid index into the TLSv1.3 PSK identities */
1784 #define TLSEXT_PSK_BAD_IDENTITY -1
1786 #define SSL_USE_PSS(s) (s->s3->tmp.peer_sigalg != NULL && \
1787 s->s3->tmp.peer_sigalg->sig == EVP_PKEY_RSA_PSS)
1789 /* A dummy signature value not valid for TLSv1.2 signature algs */
1790 #define TLSEXT_signature_rsa_pss 0x0101
1793 extern SSL3_ENC_METHOD ssl3_undef_enc_method;
1795 __owur const SSL_METHOD *ssl_bad_method(int ver);
1796 __owur const SSL_METHOD *sslv3_method(void);
1797 __owur const SSL_METHOD *sslv3_server_method(void);
1798 __owur const SSL_METHOD *sslv3_client_method(void);
1799 __owur const SSL_METHOD *tlsv1_method(void);
1800 __owur const SSL_METHOD *tlsv1_server_method(void);
1801 __owur const SSL_METHOD *tlsv1_client_method(void);
1802 __owur const SSL_METHOD *tlsv1_1_method(void);
1803 __owur const SSL_METHOD *tlsv1_1_server_method(void);
1804 __owur const SSL_METHOD *tlsv1_1_client_method(void);
1805 __owur const SSL_METHOD *tlsv1_2_method(void);
1806 __owur const SSL_METHOD *tlsv1_2_server_method(void);
1807 __owur const SSL_METHOD *tlsv1_2_client_method(void);
1808 __owur const SSL_METHOD *tlsv1_3_method(void);
1809 __owur const SSL_METHOD *tlsv1_3_server_method(void);
1810 __owur const SSL_METHOD *tlsv1_3_client_method(void);
1811 __owur const SSL_METHOD *dtlsv1_method(void);
1812 __owur const SSL_METHOD *dtlsv1_server_method(void);
1813 __owur const SSL_METHOD *dtlsv1_client_method(void);
1814 __owur const SSL_METHOD *dtls_bad_ver_client_method(void);
1815 __owur const SSL_METHOD *dtlsv1_2_method(void);
1816 __owur const SSL_METHOD *dtlsv1_2_server_method(void);
1817 __owur const SSL_METHOD *dtlsv1_2_client_method(void);
1819 extern const SSL3_ENC_METHOD TLSv1_enc_data;
1820 extern const SSL3_ENC_METHOD TLSv1_1_enc_data;
1821 extern const SSL3_ENC_METHOD TLSv1_2_enc_data;
1822 extern const SSL3_ENC_METHOD TLSv1_3_enc_data;
1823 extern const SSL3_ENC_METHOD SSLv3_enc_data;
1824 extern const SSL3_ENC_METHOD DTLSv1_enc_data;
1825 extern const SSL3_ENC_METHOD DTLSv1_2_enc_data;
1828 * Flags for SSL methods
1830 # define SSL_METHOD_NO_FIPS (1U<<0)
1831 # define SSL_METHOD_NO_SUITEB (1U<<1)
1833 # define IMPLEMENT_tls_meth_func(version, flags, mask, func_name, s_accept, \
1834 s_connect, enc_data) \
1835 const SSL_METHOD *func_name(void) \
1837 static const SSL_METHOD func_name##_data= { \
1851 ssl3_renegotiate_check, \
1854 ssl3_dispatch_alert, \
1857 ssl3_get_cipher_by_char, \
1858 ssl3_put_cipher_by_char, \
1862 tls1_default_timeout, \
1864 ssl_undefined_void_function, \
1865 ssl3_callback_ctrl, \
1866 ssl3_ctx_callback_ctrl, \
1868 return &func_name##_data; \
1871 # define IMPLEMENT_ssl3_meth_func(func_name, s_accept, s_connect) \
1872 const SSL_METHOD *func_name(void) \
1874 static const SSL_METHOD func_name##_data= { \
1876 SSL_METHOD_NO_FIPS | SSL_METHOD_NO_SUITEB, \
1888 ssl3_renegotiate_check, \
1891 ssl3_dispatch_alert, \
1894 ssl3_get_cipher_by_char, \
1895 ssl3_put_cipher_by_char, \
1899 ssl3_default_timeout, \
1901 ssl_undefined_void_function, \
1902 ssl3_callback_ctrl, \
1903 ssl3_ctx_callback_ctrl, \
1905 return &func_name##_data; \
1908 # define IMPLEMENT_dtls1_meth_func(version, flags, mask, func_name, s_accept, \
1909 s_connect, enc_data) \
1910 const SSL_METHOD *func_name(void) \
1912 static const SSL_METHOD func_name##_data= { \
1926 ssl3_renegotiate_check, \
1928 dtls1_write_app_data_bytes, \
1929 dtls1_dispatch_alert, \
1932 ssl3_get_cipher_by_char, \
1933 ssl3_put_cipher_by_char, \
1937 dtls1_default_timeout, \
1939 ssl_undefined_void_function, \
1940 ssl3_callback_ctrl, \
1941 ssl3_ctx_callback_ctrl, \
1943 return &func_name##_data; \
1946 struct openssl_ssl_test_functions {
1947 int (*p_ssl_init_wbio_buffer) (SSL *s);
1948 int (*p_ssl3_setup_buffers) (SSL *s);
1951 const char *ssl_protocol_to_string(int version);
1953 /* Returns true if certificate and private key for 'idx' are present */
1954 static ossl_inline int ssl_has_cert(const SSL *s, int idx)
1956 if (idx < 0 || idx >= SSL_PKEY_NUM)
1958 return s->cert->pkeys[idx].x509 != NULL
1959 && s->cert->pkeys[idx].privatekey != NULL;
1962 # ifndef OPENSSL_UNIT_TEST
1964 __owur int ssl_read_internal(SSL *s, void *buf, size_t num, size_t *readbytes);
1965 __owur int ssl_write_internal(SSL *s, const void *buf, size_t num, size_t *written);
1966 void ssl_clear_cipher_ctx(SSL *s);
1967 int ssl_clear_bad_session(SSL *s);
1968 __owur CERT *ssl_cert_new(void);
1969 __owur CERT *ssl_cert_dup(CERT *cert);
1970 void ssl_cert_clear_certs(CERT *c);
1971 void ssl_cert_free(CERT *c);
1972 __owur int ssl_get_new_session(SSL *s, int session);
1973 __owur int ssl_get_prev_session(SSL *s, CLIENTHELLO_MSG *hello, int *al);
1974 __owur SSL_SESSION *ssl_session_dup(SSL_SESSION *src, int ticket);
1975 __owur int ssl_cipher_id_cmp(const SSL_CIPHER *a, const SSL_CIPHER *b);
1976 DECLARE_OBJ_BSEARCH_GLOBAL_CMP_FN(SSL_CIPHER, SSL_CIPHER, ssl_cipher_id);
1977 __owur int ssl_cipher_ptr_id_cmp(const SSL_CIPHER *const *ap,
1978 const SSL_CIPHER *const *bp);
1979 __owur STACK_OF(SSL_CIPHER) *ssl_create_cipher_list(const SSL_METHOD *meth,
1980 STACK_OF(SSL_CIPHER) **pref,
1981 STACK_OF(SSL_CIPHER)
1983 const char *rule_str,
1985 __owur int ssl_cache_cipherlist(SSL *s, PACKET *cipher_suites,
1986 int sslv2format, int *al);
1987 __owur int bytes_to_cipher_list(SSL *s, PACKET *cipher_suites,
1988 STACK_OF(SSL_CIPHER) **skp,
1989 STACK_OF(SSL_CIPHER) **scsvs, int sslv2format,
1991 void ssl_update_cache(SSL *s, int mode);
1992 __owur int ssl_cipher_get_evp(const SSL_SESSION *s, const EVP_CIPHER **enc,
1993 const EVP_MD **md, int *mac_pkey_type,
1994 size_t *mac_secret_size, SSL_COMP **comp,
1996 __owur int ssl_cipher_get_overhead(const SSL_CIPHER *c, size_t *mac_overhead,
1997 size_t *int_overhead, size_t *blocksize,
1998 size_t *ext_overhead);
1999 __owur int ssl_cipher_get_cert_index(const SSL_CIPHER *c);
2000 __owur const SSL_CIPHER *ssl_get_cipher_by_char(SSL *ssl,
2001 const unsigned char *ptr,
2003 __owur int ssl_cert_set0_chain(SSL *s, SSL_CTX *ctx, STACK_OF(X509) *chain);
2004 __owur int ssl_cert_set1_chain(SSL *s, SSL_CTX *ctx, STACK_OF(X509) *chain);
2005 __owur int ssl_cert_add0_chain_cert(SSL *s, SSL_CTX *ctx, X509 *x);
2006 __owur int ssl_cert_add1_chain_cert(SSL *s, SSL_CTX *ctx, X509 *x);
2007 __owur int ssl_cert_select_current(CERT *c, X509 *x);
2008 __owur int ssl_cert_set_current(CERT *c, long arg);
2009 __owur X509 *ssl_cert_get0_next_certificate(CERT *c, int first);
2010 void ssl_cert_set_cert_cb(CERT *c, int (*cb) (SSL *ssl, void *arg), void *arg);
2012 __owur int ssl_verify_cert_chain(SSL *s, STACK_OF(X509) *sk);
2013 __owur int ssl_build_cert_chain(SSL *s, SSL_CTX *ctx, int flags);
2014 __owur int ssl_cert_set_cert_store(CERT *c, X509_STORE *store, int chain,
2017 __owur int ssl_security(const SSL *s, int op, int bits, int nid, void *other);
2018 __owur int ssl_ctx_security(const SSL_CTX *ctx, int op, int bits, int nid,
2021 int ssl_undefined_function(SSL *s);
2022 __owur int ssl_undefined_void_function(void);
2023 __owur int ssl_undefined_const_function(const SSL *s);
2024 __owur int ssl_get_server_cert_serverinfo(SSL *s,
2025 const unsigned char **serverinfo,
2026 size_t *serverinfo_length);
2027 __owur int ssl_cert_type(const X509 *x, const EVP_PKEY *pkey);
2028 void ssl_set_masks(SSL *s);
2029 __owur STACK_OF(SSL_CIPHER) *ssl_get_ciphers_by_id(SSL *s);
2030 __owur int ssl_verify_alarm_type(long type);
2031 void ssl_sort_cipher_list(void);
2032 void ssl_load_ciphers(void);
2033 __owur int ssl_fill_hello_random(SSL *s, int server, unsigned char *field,
2035 __owur int ssl_generate_master_secret(SSL *s, unsigned char *pms, size_t pmslen,
2037 __owur EVP_PKEY *ssl_generate_pkey(EVP_PKEY *pm);
2038 __owur int ssl_derive(SSL *s, EVP_PKEY *privkey, EVP_PKEY *pubkey,
2040 __owur EVP_PKEY *ssl_dh_to_pkey(DH *dh);
2042 __owur const SSL_CIPHER *ssl3_get_cipher_by_id(uint32_t id);
2043 __owur const SSL_CIPHER *ssl3_get_cipher_by_char(const unsigned char *p);
2044 __owur int ssl3_put_cipher_by_char(const SSL_CIPHER *c, WPACKET *pkt,
2046 int ssl3_init_finished_mac(SSL *s);
2047 __owur int ssl3_setup_key_block(SSL *s);
2048 __owur int ssl3_change_cipher_state(SSL *s, int which);
2049 void ssl3_cleanup_key_block(SSL *s);
2050 __owur int ssl3_do_write(SSL *s, int type);
2051 int ssl3_send_alert(SSL *s, int level, int desc);
2052 __owur int ssl3_generate_master_secret(SSL *s, unsigned char *out,
2053 unsigned char *p, size_t len,
2054 size_t *secret_size);
2055 __owur int ssl3_get_req_cert_type(SSL *s, WPACKET *pkt);
2056 __owur int ssl3_num_ciphers(void);
2057 __owur const SSL_CIPHER *ssl3_get_cipher(unsigned int u);
2058 int ssl3_renegotiate(SSL *ssl);
2059 int ssl3_renegotiate_check(SSL *ssl, int initok);
2060 __owur int ssl3_dispatch_alert(SSL *s);
2061 __owur size_t ssl3_final_finish_mac(SSL *s, const char *sender, size_t slen,
2063 __owur int ssl3_finish_mac(SSL *s, const unsigned char *buf, size_t len);
2064 void ssl3_free_digest_list(SSL *s);
2065 __owur unsigned long ssl3_output_cert_chain(SSL *s, WPACKET *pkt,
2066 CERT_PKEY *cpk, int *al);
2067 __owur const SSL_CIPHER *ssl3_choose_cipher(SSL *ssl,
2068 STACK_OF(SSL_CIPHER) *clnt,
2069 STACK_OF(SSL_CIPHER) *srvr);
2070 __owur int ssl3_digest_cached_records(SSL *s, int keep);
2071 __owur int ssl3_new(SSL *s);
2072 void ssl3_free(SSL *s);
2073 __owur int ssl3_read(SSL *s, void *buf, size_t len, size_t *readbytes);
2074 __owur int ssl3_peek(SSL *s, void *buf, size_t len, size_t *readbytes);
2075 __owur int ssl3_write(SSL *s, const void *buf, size_t len, size_t *written);
2076 __owur int ssl3_shutdown(SSL *s);
2077 void ssl3_clear(SSL *s);
2078 __owur long ssl3_ctrl(SSL *s, int cmd, long larg, void *parg);
2079 __owur long ssl3_ctx_ctrl(SSL_CTX *s, int cmd, long larg, void *parg);
2080 __owur long ssl3_callback_ctrl(SSL *s, int cmd, void (*fp) (void));
2081 __owur long ssl3_ctx_callback_ctrl(SSL_CTX *s, int cmd, void (*fp) (void));
2083 __owur int ssl3_do_change_cipher_spec(SSL *ssl);
2084 __owur long ssl3_default_timeout(void);
2086 __owur int ssl3_set_handshake_header(SSL *s, WPACKET *pkt, int htype);
2087 __owur int tls_close_construct_packet(SSL *s, WPACKET *pkt, int htype);
2088 __owur int tls_setup_handshake(SSL *s);
2089 __owur int dtls1_set_handshake_header(SSL *s, WPACKET *pkt, int htype);
2090 __owur int dtls1_close_construct_packet(SSL *s, WPACKET *pkt, int htype);
2091 __owur int ssl3_handshake_write(SSL *s);
2093 __owur int ssl_allow_compression(SSL *s);
2095 __owur int ssl_version_supported(const SSL *s, int version);
2097 __owur int ssl_set_client_hello_version(SSL *s);
2098 __owur int ssl_check_version_downgrade(SSL *s);
2099 __owur int ssl_set_version_bound(int method_version, int version, int *bound);
2100 __owur int ssl_choose_server_version(SSL *s, CLIENTHELLO_MSG *hello);
2101 __owur int ssl_choose_client_version(SSL *s, int version);
2102 int ssl_get_client_min_max_version(const SSL *s, int *min_version,
2105 __owur long tls1_default_timeout(void);
2106 __owur int dtls1_do_write(SSL *s, int type);
2107 void dtls1_set_message_header(SSL *s,
2110 size_t frag_off, size_t frag_len);
2112 int dtls1_write_app_data_bytes(SSL *s, int type, const void *buf_, size_t len,
2115 __owur int dtls1_read_failed(SSL *s, int code);
2116 __owur int dtls1_buffer_message(SSL *s, int ccs);
2117 __owur int dtls1_retransmit_message(SSL *s, unsigned short seq, int *found);
2118 __owur int dtls1_get_queue_priority(unsigned short seq, int is_ccs);
2119 int dtls1_retransmit_buffered_messages(SSL *s);
2120 void dtls1_clear_received_buffer(SSL *s);
2121 void dtls1_clear_sent_buffer(SSL *s);
2122 void dtls1_get_message_header(unsigned char *data,
2123 struct hm_header_st *msg_hdr);
2124 __owur long dtls1_default_timeout(void);
2125 __owur struct timeval *dtls1_get_timeout(SSL *s, struct timeval *timeleft);
2126 __owur int dtls1_check_timeout_num(SSL *s);
2127 __owur int dtls1_handle_timeout(SSL *s);
2128 void dtls1_start_timer(SSL *s);
2129 void dtls1_stop_timer(SSL *s);
2130 __owur int dtls1_is_timer_expired(SSL *s);
2131 void dtls1_double_timeout(SSL *s);
2132 __owur int dtls_raw_hello_verify_request(WPACKET *pkt, unsigned char *cookie,
2134 __owur int dtls1_send_newsession_ticket(SSL *s);
2135 __owur size_t dtls1_min_mtu(SSL *s);
2136 void dtls1_hm_fragment_free(hm_fragment *frag);
2137 __owur int dtls1_query_mtu(SSL *s);
2139 __owur int tls1_new(SSL *s);
2140 void tls1_free(SSL *s);
2141 void tls1_clear(SSL *s);
2142 long tls1_ctrl(SSL *s, int cmd, long larg, void *parg);
2143 long tls1_callback_ctrl(SSL *s, int cmd, void (*fp) (void));
2145 __owur int dtls1_new(SSL *s);
2146 void dtls1_free(SSL *s);
2147 void dtls1_clear(SSL *s);
2148 long dtls1_ctrl(SSL *s, int cmd, long larg, void *parg);
2149 __owur int dtls1_shutdown(SSL *s);
2151 __owur int dtls1_dispatch_alert(SSL *s);
2153 __owur int ssl_init_wbio_buffer(SSL *s);
2154 void ssl_free_wbio_buffer(SSL *s);
2156 __owur int tls1_change_cipher_state(SSL *s, int which);
2157 __owur int tls1_setup_key_block(SSL *s);
2158 __owur size_t tls1_final_finish_mac(SSL *s, const char *str, size_t slen,
2160 __owur int tls1_generate_master_secret(SSL *s, unsigned char *out,
2161 unsigned char *p, size_t len,
2162 size_t *secret_size);
2163 __owur int tls13_setup_key_block(SSL *s);
2164 __owur size_t tls13_final_finish_mac(SSL *s, const char *str, size_t slen,
2166 __owur int tls13_change_cipher_state(SSL *s, int which);
2167 __owur int tls13_update_key(SSL *s, int send);
2168 __owur int tls13_hkdf_expand(SSL *s, const EVP_MD *md,
2169 const unsigned char *secret,
2170 const unsigned char *label, size_t labellen,
2171 const unsigned char *hash,
2172 unsigned char *out, size_t outlen);
2173 __owur int tls13_derive_key(SSL *s, const unsigned char *secret,
2174 unsigned char *key, size_t keylen);
2175 __owur int tls13_derive_iv(SSL *s, const unsigned char *secret,
2176 unsigned char *iv, size_t ivlen);
2177 __owur int tls13_derive_finishedkey(SSL *s, const EVP_MD *md,
2178 const unsigned char *secret,
2179 unsigned char *fin, size_t finlen);
2180 int tls13_generate_secret(SSL *s, const EVP_MD *md,
2181 const unsigned char *prevsecret,
2182 const unsigned char *insecret,
2184 unsigned char *outsecret);
2185 __owur int tls13_generate_handshake_secret(SSL *s,
2186 const unsigned char *insecret,
2187 size_t insecretlen);
2188 __owur int tls13_generate_master_secret(SSL *s, unsigned char *out,
2189 unsigned char *prev, size_t prevlen,
2190 size_t *secret_size);
2191 __owur int tls1_export_keying_material(SSL *s, unsigned char *out, size_t olen,
2192 const char *label, size_t llen,
2193 const unsigned char *p, size_t plen,
2195 __owur int tls1_alert_code(int code);
2196 __owur int tls13_alert_code(int code);
2197 __owur int ssl3_alert_code(int code);
2199 # ifndef OPENSSL_NO_EC
2200 __owur int ssl_check_srvr_ecc_cert_and_alg(X509 *x, SSL *s);
2203 SSL_COMP *ssl3_comp_find(STACK_OF(SSL_COMP) *sk, int n);
2205 # ifndef OPENSSL_NO_EC
2206 /* Flags values from tls1_ec_curve_id2nid() */
2207 /* Mask for curve type */
2208 # define TLS_CURVE_TYPE 0x3
2209 # define TLS_CURVE_PRIME 0x0
2210 # define TLS_CURVE_CHAR2 0x1
2211 # define TLS_CURVE_CUSTOM 0x2
2213 #define bytestogroup(bytes) ((unsigned int)(bytes[0] << 8 | bytes[1]))
2215 __owur int tls1_ec_curve_id2nid(int curve_id, unsigned int *pflags);
2216 __owur int tls1_ec_nid2curve_id(int nid);
2217 __owur int tls1_check_curve(SSL *s, const unsigned char *p, size_t len);
2218 __owur int tls1_shared_group(SSL *s, int nmatch);
2219 __owur int tls1_set_groups(unsigned char **pext, size_t *pextlen,
2220 int *curves, size_t ncurves);
2221 __owur int tls1_set_groups_list(unsigned char **pext, size_t *pextlen,
2223 void tls1_get_formatlist(SSL *s, const unsigned char **pformats,
2224 size_t *num_formats);
2225 __owur int tls1_check_ec_tmp_key(SSL *s, unsigned long id);
2226 __owur EVP_PKEY *ssl_generate_pkey_curve(int id);
2227 # endif /* OPENSSL_NO_EC */
2229 __owur int tls1_shared_list(SSL *s,
2230 const unsigned char *l1, size_t l1len,
2231 const unsigned char *l2, size_t l2len, int nmatch);
2232 __owur int tls_curve_allowed(SSL *s, const unsigned char *curve, int op);
2233 __owur int tls1_get_curvelist(SSL *s, int sess, const unsigned char **pcurves,
2234 size_t *num_curves);
2236 void ssl_set_default_md(SSL *s);
2237 __owur int tls1_set_server_sigalgs(SSL *s);
2239 /* Return codes for tls_get_ticket_from_client() and tls_decrypt_ticket() */
2240 typedef enum ticket_en {
2241 /* fatal error, malloc failure */
2242 TICKET_FATAL_ERR_MALLOC,
2243 /* fatal error, either from parsing or decrypting the ticket */
2244 TICKET_FATAL_ERR_OTHER,
2245 /* No ticket present */
2247 /* Empty ticket present */
2249 /* the ticket couldn't be decrypted */
2251 /* a ticket was successfully decrypted */
2253 /* same as above but the ticket needs to be reneewed */
2254 TICKET_SUCCESS_RENEW
2257 __owur TICKET_RETURN tls_get_ticket_from_client(SSL *s, CLIENTHELLO_MSG *hello,
2259 __owur TICKET_RETURN tls_decrypt_ticket(SSL *s, const unsigned char *etick,
2261 const unsigned char *sess_id,
2262 size_t sesslen, SSL_SESSION **psess);
2264 __owur int tls_use_ticket(SSL *s);
2266 void ssl_set_sig_mask(uint32_t *pmask_a, SSL *s, int op);
2268 __owur int tls1_set_sigalgs_list(CERT *c, const char *str, int client);
2269 __owur int tls1_set_sigalgs(CERT *c, const int *salg, size_t salglen,
2271 int tls1_check_chain(SSL *s, X509 *x, EVP_PKEY *pk, STACK_OF(X509) *chain,
2273 void tls1_set_cert_validity(SSL *s);
2275 # ifndef OPENSSL_NO_CT
2276 __owur int ssl_validate_ct(SSL *s);
2279 # ifndef OPENSSL_NO_DH
2280 __owur DH *ssl_get_auto_dh(SSL *s);
2283 __owur int ssl_security_cert(SSL *s, SSL_CTX *ctx, X509 *x, int vfy, int is_ee);
2284 __owur int ssl_security_cert_chain(SSL *s, STACK_OF(X509) *sk, X509 *ex,
2287 int tls_choose_sigalg(SSL *s, int *al);
2289 __owur EVP_MD_CTX *ssl_replace_hash(EVP_MD_CTX **hash, const EVP_MD *md);
2290 void ssl_clear_hash_ctx(EVP_MD_CTX **hash);
2291 __owur long ssl_get_algorithm2(SSL *s);
2292 __owur int tls12_copy_sigalgs(SSL *s, WPACKET *pkt,
2293 const uint16_t *psig, size_t psiglen);
2294 __owur int tls1_save_sigalgs(SSL *s, PACKET *pkt);
2295 __owur int tls1_process_sigalgs(SSL *s);
2296 __owur int tls1_set_peer_legacy_sigalg(SSL *s, const EVP_PKEY *pkey);
2297 __owur size_t tls12_get_psigalgs(SSL *s, int sent, const uint16_t **psigs);
2298 __owur int tls12_check_peer_sigalg(SSL *s, uint16_t, EVP_PKEY *pkey);
2299 void ssl_set_client_disabled(SSL *s);
2300 __owur int ssl_cipher_disabled(SSL *s, const SSL_CIPHER *c, int op);
2302 __owur int ssl_handshake_hash(SSL *s, unsigned char *out, size_t outlen,
2304 __owur const EVP_MD *ssl_md(int idx);
2305 __owur const EVP_MD *ssl_handshake_md(SSL *s);
2306 __owur const EVP_MD *ssl_prf_md(SSL *s);
2309 * ssl_log_rsa_client_key_exchange logs |premaster| to the SSL_CTX associated
2310 * with |ssl|, if logging is enabled. It returns one on success and zero on
2311 * failure. The entry is identified by the first 8 bytes of
2312 * |encrypted_premaster|.
2314 __owur int ssl_log_rsa_client_key_exchange(SSL *ssl,
2315 const uint8_t *encrypted_premaster,
2316 size_t encrypted_premaster_len,
2317 const uint8_t *premaster,
2318 size_t premaster_len);
2321 * ssl_log_secret logs |secret| to the SSL_CTX associated with |ssl|, if
2322 * logging is available. It returns one on success and zero on failure. It tags
2323 * the entry with |label|.
2325 __owur int ssl_log_secret(SSL *ssl, const char *label,
2326 const uint8_t *secret, size_t secret_len);
2328 #define MASTER_SECRET_LABEL "CLIENT_RANDOM"
2329 #define CLIENT_HANDSHAKE_LABEL "CLIENT_HANDSHAKE_TRAFFIC_SECRET"
2330 #define SERVER_HANDSHAKE_LABEL "SERVER_HANDSHAKE_TRAFFIC_SECRET"
2331 #define CLIENT_APPLICATION_LABEL "CLIENT_TRAFFIC_SECRET_0"
2332 #define SERVER_APPLICATION_LABEL "SERVER_TRAFFIC_SECRET_0"
2335 __owur char ssl3_cbc_record_digest_supported(const EVP_MD_CTX *ctx);
2336 __owur int ssl3_cbc_digest_record(const EVP_MD_CTX *ctx,
2337 unsigned char *md_out,
2338 size_t *md_out_size,
2339 const unsigned char header[13],
2340 const unsigned char *data,
2341 size_t data_plus_mac_size,
2342 size_t data_plus_mac_plus_padding_size,
2343 const unsigned char *mac_secret,
2344 size_t mac_secret_length, char is_sslv3);
2346 __owur int srp_generate_server_master_secret(SSL *s);
2347 __owur int srp_generate_client_master_secret(SSL *s);
2348 __owur int srp_verify_server_param(SSL *s, int *al);
2352 void custom_ext_init(custom_ext_methods *meths);
2354 __owur int custom_ext_parse(SSL *s, int server,
2355 unsigned int ext_type,
2356 const unsigned char *ext_data, size_t ext_size,
2358 __owur int custom_ext_add(SSL *s, int server, WPACKET *pkt, int *al);
2360 __owur int custom_exts_copy(custom_ext_methods *dst,
2361 const custom_ext_methods *src);
2362 void custom_exts_free(custom_ext_methods *exts);
2364 void ssl_comp_free_compression_methods_int(void);
2366 # else /* OPENSSL_UNIT_TEST */
2368 # define ssl_init_wbio_buffer SSL_test_functions()->p_ssl_init_wbio_buffer
2369 # define ssl3_setup_buffers SSL_test_functions()->p_ssl3_setup_buffers