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846e33c7 RS |
1 | /* |
2 | * Copyright 2015-2016 The OpenSSL Project Authors. All Rights Reserved. | |
61ae935a | 3 | * |
846e33c7 RS |
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 | |
61ae935a MC |
8 | */ |
9 | ||
10 | /***************************************************************************** | |
11 | * * | |
12 | * The following definitions are PRIVATE to the state machine. They should * | |
13 | * NOT be used outside of the state machine. * | |
14 | * * | |
15 | *****************************************************************************/ | |
16 | ||
17 | /* Max message length definitions */ | |
18 | ||
19 | /* The spec allows for a longer length than this, but we limit it */ | |
20 | #define HELLO_VERIFY_REQUEST_MAX_LENGTH 258 | |
21 | #define SERVER_HELLO_MAX_LENGTH 20000 | |
e46f2334 | 22 | #define ENCRYPTED_EXTENSIONS_MAX_LENGTH 20000 |
61ae935a MC |
23 | #define SERVER_KEY_EXCH_MAX_LENGTH 102400 |
24 | #define SERVER_HELLO_DONE_MAX_LENGTH 0 | |
25 | #define CCS_MAX_LENGTH 1 | |
26 | /* Max should actually be 36 but we are generous */ | |
27 | #define FINISHED_MAX_LENGTH 64 | |
28 | ||
29 | /* Message processing return codes */ | |
be3583fa | 30 | typedef enum { |
61ae935a MC |
31 | /* Something bad happened */ |
32 | MSG_PROCESS_ERROR, | |
33 | /* We've finished reading - swap to writing */ | |
34 | MSG_PROCESS_FINISHED_READING, | |
35 | /* | |
36 | * We've completed the main processing of this message but there is some | |
37 | * post processing to be done. | |
38 | */ | |
39 | MSG_PROCESS_CONTINUE_PROCESSING, | |
40 | /* We've finished this message - read the next message */ | |
41 | MSG_PROCESS_CONTINUE_READING | |
be3583fa | 42 | } MSG_PROCESS_RETURN; |
61ae935a MC |
43 | |
44 | /* Flush the write BIO */ | |
45 | int statem_flush(SSL *s); | |
46 | ||
a15c953f MC |
47 | typedef int (*confunc_f) (SSL *s, WPACKET *pkt); |
48 | ||
61ae935a MC |
49 | /* |
50 | * TLS/DTLS client state machine functions | |
51 | */ | |
8481f583 MC |
52 | int ossl_statem_client_read_transition(SSL *s, int mt); |
53 | WRITE_TRAN ossl_statem_client_write_transition(SSL *s); | |
54 | WORK_STATE ossl_statem_client_pre_work(SSL *s, WORK_STATE wst); | |
55 | WORK_STATE ossl_statem_client_post_work(SSL *s, WORK_STATE wst); | |
6392fb8e | 56 | int ossl_statem_client_construct_message(SSL *s, WPACKET *pkt, |
a15c953f | 57 | confunc_f *confunc, int *mt); |
eda75751 | 58 | size_t ossl_statem_client_max_message_size(SSL *s); |
8481f583 MC |
59 | MSG_PROCESS_RETURN ossl_statem_client_process_message(SSL *s, PACKET *pkt); |
60 | WORK_STATE ossl_statem_client_post_process_message(SSL *s, WORK_STATE wst); | |
61ae935a MC |
61 | |
62 | /* | |
63 | * TLS/DTLS server state machine functions | |
64 | */ | |
8481f583 MC |
65 | int ossl_statem_server_read_transition(SSL *s, int mt); |
66 | WRITE_TRAN ossl_statem_server_write_transition(SSL *s); | |
67 | WORK_STATE ossl_statem_server_pre_work(SSL *s, WORK_STATE wst); | |
68 | WORK_STATE ossl_statem_server_post_work(SSL *s, WORK_STATE wst); | |
6392fb8e | 69 | int ossl_statem_server_construct_message(SSL *s, WPACKET *pkt, |
a15c953f | 70 | confunc_f *confunc,int *mt); |
eda75751 | 71 | size_t ossl_statem_server_max_message_size(SSL *s); |
8481f583 MC |
72 | MSG_PROCESS_RETURN ossl_statem_server_process_message(SSL *s, PACKET *pkt); |
73 | WORK_STATE ossl_statem_server_post_process_message(SSL *s, WORK_STATE wst); | |
61ae935a MC |
74 | |
75 | /* Functions for getting new message data */ | |
76 | __owur int tls_get_message_header(SSL *s, int *mt); | |
eda75751 MC |
77 | __owur int tls_get_message_body(SSL *s, size_t *len); |
78 | __owur int dtls_get_message(SSL *s, int *mt, size_t *len); | |
61ae935a MC |
79 | |
80 | /* Message construction and processing functions */ | |
7776a36c | 81 | __owur int tls_process_initial_server_flight(SSL *s, int *al); |
be3583fa MC |
82 | __owur MSG_PROCESS_RETURN tls_process_change_cipher_spec(SSL *s, PACKET *pkt); |
83 | __owur MSG_PROCESS_RETURN tls_process_finished(SSL *s, PACKET *pkt); | |
7cea05dc MC |
84 | __owur int tls_construct_change_cipher_spec(SSL *s, WPACKET *pkt); |
85 | __owur int dtls_construct_change_cipher_spec(SSL *s, WPACKET *pkt); | |
61ae935a | 86 | |
229185e6 | 87 | __owur int tls_construct_finished(SSL *s, WPACKET *pkt); |
be3583fa MC |
88 | __owur WORK_STATE tls_finish_handshake(SSL *s, WORK_STATE wst); |
89 | __owur WORK_STATE dtls_wait_for_dry(SSL *s); | |
61ae935a | 90 | |
b1b4b543 | 91 | int tls_collect_extensions(PACKET *packet, RAW_EXTENSION **res, |
1ab3836b MC |
92 | size_t *numfound, int *ad); |
93 | ||
61ae935a | 94 | /* some client-only functions */ |
7cea05dc | 95 | __owur int tls_construct_client_hello(SSL *s, WPACKET *pkt); |
be3583fa MC |
96 | __owur MSG_PROCESS_RETURN tls_process_server_hello(SSL *s, PACKET *pkt); |
97 | __owur MSG_PROCESS_RETURN tls_process_certificate_request(SSL *s, PACKET *pkt); | |
98 | __owur MSG_PROCESS_RETURN tls_process_new_session_ticket(SSL *s, PACKET *pkt); | |
99 | __owur MSG_PROCESS_RETURN tls_process_cert_status(SSL *s, PACKET *pkt); | |
100 | __owur MSG_PROCESS_RETURN tls_process_server_done(SSL *s, PACKET *pkt); | |
7cea05dc | 101 | __owur int tls_construct_client_verify(SSL *s, WPACKET *pkt); |
be3583fa | 102 | __owur WORK_STATE tls_prepare_client_certificate(SSL *s, WORK_STATE wst); |
7cea05dc | 103 | __owur int tls_construct_client_certificate(SSL *s, WPACKET *pkt); |
61ae935a | 104 | __owur int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey); |
7cea05dc | 105 | __owur int tls_construct_client_key_exchange(SSL *s, WPACKET *pkt); |
61ae935a | 106 | __owur int tls_client_key_exchange_post_work(SSL *s); |
7cea05dc | 107 | __owur int tls_construct_cert_status(SSL *s, WPACKET *pkt); |
a230b26e | 108 | __owur MSG_PROCESS_RETURN tls_process_key_exchange(SSL *s, PACKET *pkt); |
be3583fa | 109 | __owur MSG_PROCESS_RETURN tls_process_server_certificate(SSL *s, PACKET *pkt); |
61ae935a | 110 | __owur int ssl3_check_cert_and_algorithm(SSL *s); |
a230b26e | 111 | #ifndef OPENSSL_NO_NEXTPROTONEG |
7cea05dc | 112 | __owur int tls_construct_next_proto(SSL *s, WPACKET *pkt); |
a230b26e | 113 | #endif |
be3583fa | 114 | __owur MSG_PROCESS_RETURN dtls_process_hello_verify(SSL *s, PACKET *pkt); |
61ae935a MC |
115 | |
116 | /* some server-only functions */ | |
be3583fa MC |
117 | __owur MSG_PROCESS_RETURN tls_process_client_hello(SSL *s, PACKET *pkt); |
118 | __owur WORK_STATE tls_post_process_client_hello(SSL *s, WORK_STATE wst); | |
7cea05dc | 119 | __owur int tls_construct_server_hello(SSL *s, WPACKET *pkt); |
7cea05dc MC |
120 | __owur int dtls_construct_hello_verify_request(SSL *s, WPACKET *pkt); |
121 | __owur int tls_construct_server_certificate(SSL *s, WPACKET *pkt); | |
122 | __owur int tls_construct_server_key_exchange(SSL *s, WPACKET *pkt); | |
123 | __owur int tls_construct_certificate_request(SSL *s, WPACKET *pkt); | |
124 | __owur int tls_construct_server_done(SSL *s, WPACKET *pkt); | |
be3583fa MC |
125 | __owur MSG_PROCESS_RETURN tls_process_client_certificate(SSL *s, PACKET *pkt); |
126 | __owur MSG_PROCESS_RETURN tls_process_client_key_exchange(SSL *s, PACKET *pkt); | |
127 | __owur WORK_STATE tls_post_process_client_key_exchange(SSL *s, WORK_STATE wst); | |
128 | __owur MSG_PROCESS_RETURN tls_process_cert_verify(SSL *s, PACKET *pkt); | |
a230b26e | 129 | #ifndef OPENSSL_NO_NEXTPROTONEG |
be3583fa | 130 | __owur MSG_PROCESS_RETURN tls_process_next_proto(SSL *s, PACKET *pkt); |
a230b26e | 131 | #endif |
7cea05dc | 132 | __owur int tls_construct_new_session_ticket(SSL *s, WPACKET *pkt); |