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/*
* Copyright 2015-2018 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the OpenSSL license (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
/*****************************************************************************
* *
* The following definitions are PRIVATE to the state machine. They should *
* NOT be used outside of the state machine. *
* *
*****************************************************************************/
/* Max message length definitions */
/* The spec allows for a longer length than this, but we limit it */
#define HELLO_VERIFY_REQUEST_MAX_LENGTH 258
#define END_OF_EARLY_DATA_MAX_LENGTH 0
#define SERVER_HELLO_MAX_LENGTH 20000
#define HELLO_RETRY_REQUEST_MAX_LENGTH 20000
#define ENCRYPTED_EXTENSIONS_MAX_LENGTH 20000
#define SERVER_KEY_EXCH_MAX_LENGTH 102400
#define SERVER_HELLO_DONE_MAX_LENGTH 0
#define KEY_UPDATE_MAX_LENGTH 1
#define CCS_MAX_LENGTH 1
/* Max should actually be 36 but we are generous */
#define FINISHED_MAX_LENGTH 64
/* The maximum number of incoming KeyUpdate messages we will accept */
#define MAX_KEY_UPDATE_MESSAGES 32
/* Dummy message type */
#define SSL3_MT_DUMMY -1
extern const unsigned char hrrrandom[];
/* Message processing return codes */
typedef enum {
/* Something bad happened */
MSG_PROCESS_ERROR,
/* We've finished reading - swap to writing */
MSG_PROCESS_FINISHED_READING,
/*
* We've completed the main processing of this message but there is some
* post processing to be done.
*/
MSG_PROCESS_CONTINUE_PROCESSING,
/* We've finished this message - read the next message */
MSG_PROCESS_CONTINUE_READING
} MSG_PROCESS_RETURN;
typedef int (*confunc_f) (SSL *s, WPACKET *pkt);
int ssl3_take_mac(SSL *s);
int check_in_list(SSL *s, uint16_t group_id, const uint16_t *groups,
size_t num_groups, int checkallow);
int create_synthetic_message_hash(SSL *s, const unsigned char *hashval,
size_t hashlen, const unsigned char *hrr,
size_t hrrlen);
int parse_ca_names(SSL *s, PACKET *pkt);
const STACK_OF(X509_NAME) *get_ca_names(SSL *s);
int construct_ca_names(SSL *s, const STACK_OF(X509_NAME) *ca_sk, WPACKET *pkt);
size_t construct_key_exchange_tbs(SSL *s, unsigned char **ptbs,
const void *param, size_t paramlen);
/*
* TLS/DTLS client state machine functions
*/
int ossl_statem_client_read_transition(SSL *s, int mt);
WRITE_TRAN ossl_statem_client_write_transition(SSL *s);
WORK_STATE ossl_statem_client_pre_work(SSL *s, WORK_STATE wst);
WORK_STATE ossl_statem_client_post_work(SSL *s, WORK_STATE wst);
int ossl_statem_client_construct_message(SSL *s, WPACKET *pkt,
confunc_f *confunc, int *mt);
size_t ossl_statem_client_max_message_size(SSL *s);
MSG_PROCESS_RETURN ossl_statem_client_process_message(SSL *s, PACKET *pkt);
WORK_STATE ossl_statem_client_post_process_message(SSL *s, WORK_STATE wst);
/*
* TLS/DTLS server state machine functions
*/
int ossl_statem_server_read_transition(SSL *s, int mt);
WRITE_TRAN ossl_statem_server_write_transition(SSL *s);
WORK_STATE ossl_statem_server_pre_work(SSL *s, WORK_STATE wst);
WORK_STATE ossl_statem_server_post_work(SSL *s, WORK_STATE wst);
int ossl_statem_server_construct_message(SSL *s, WPACKET *pkt,
confunc_f *confunc,int *mt);
size_t ossl_statem_server_max_message_size(SSL *s);
MSG_PROCESS_RETURN ossl_statem_server_process_message(SSL *s, PACKET *pkt);
WORK_STATE ossl_statem_server_post_process_message(SSL *s, WORK_STATE wst);
/* Functions for getting new message data */
__owur int tls_get_message_header(SSL *s, int *mt);
__owur int tls_get_message_body(SSL *s, size_t *len);
__owur int dtls_get_message(SSL *s, int *mt, size_t *len);
/* Message construction and processing functions */
__owur int tls_process_initial_server_flight(SSL *s);
__owur MSG_PROCESS_RETURN tls_process_change_cipher_spec(SSL *s, PACKET *pkt);
__owur MSG_PROCESS_RETURN tls_process_finished(SSL *s, PACKET *pkt);
__owur int tls_construct_change_cipher_spec(SSL *s, WPACKET *pkt);
__owur int dtls_construct_change_cipher_spec(SSL *s, WPACKET *pkt);
__owur int tls_construct_finished(SSL *s, WPACKET *pkt);
__owur int tls_construct_key_update(SSL *s, WPACKET *pkt);
__owur MSG_PROCESS_RETURN tls_process_key_update(SSL *s, PACKET *pkt);
__owur WORK_STATE tls_finish_handshake(SSL *s, WORK_STATE wst, int clearbufs,
int stop);
__owur WORK_STATE dtls_wait_for_dry(SSL *s);
/* some client-only functions */
__owur int tls_construct_client_hello(SSL *s, WPACKET *pkt);
__owur MSG_PROCESS_RETURN tls_process_server_hello(SSL *s, PACKET *pkt);
__owur MSG_PROCESS_RETURN tls_process_certificate_request(SSL *s, PACKET *pkt);
__owur MSG_PROCESS_RETURN tls_process_new_session_ticket(SSL *s, PACKET *pkt);
__owur int tls_process_cert_status_body(SSL *s, PACKET *pkt);
__owur MSG_PROCESS_RETURN tls_process_cert_status(SSL *s, PACKET *pkt);
__owur MSG_PROCESS_RETURN tls_process_server_done(SSL *s, PACKET *pkt);
__owur int tls_construct_cert_verify(SSL *s, WPACKET *pkt);
__owur WORK_STATE tls_prepare_client_certificate(SSL *s, WORK_STATE wst);
__owur int tls_construct_client_certificate(SSL *s, WPACKET *pkt);
__owur int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey);
__owur int tls_construct_client_key_exchange(SSL *s, WPACKET *pkt);
__owur int tls_client_key_exchange_post_work(SSL *s);
__owur int tls_construct_cert_status_body(SSL *s, WPACKET *pkt);
__owur int tls_construct_cert_status(SSL *s, WPACKET *pkt);
__owur MSG_PROCESS_RETURN tls_process_key_exchange(SSL *s, PACKET *pkt);
__owur MSG_PROCESS_RETURN tls_process_server_certificate(SSL *s, PACKET *pkt);
__owur int ssl3_check_cert_and_algorithm(SSL *s);
#ifndef OPENSSL_NO_NEXTPROTONEG
__owur int tls_construct_next_proto(SSL *s, WPACKET *pkt);
#endif
__owur MSG_PROCESS_RETURN tls_process_hello_req(SSL *s, PACKET *pkt);
__owur MSG_PROCESS_RETURN dtls_process_hello_verify(SSL *s, PACKET *pkt);
__owur int tls_construct_end_of_early_data(SSL *s, WPACKET *pkt);
/* some server-only functions */
__owur MSG_PROCESS_RETURN tls_process_client_hello(SSL *s, PACKET *pkt);
__owur WORK_STATE tls_post_process_client_hello(SSL *s, WORK_STATE wst);
__owur int tls_construct_server_hello(SSL *s, WPACKET *pkt);
__owur int dtls_construct_hello_verify_request(SSL *s, WPACKET *pkt);
__owur int tls_construct_server_certificate(SSL *s, WPACKET *pkt);
__owur int tls_construct_server_key_exchange(SSL *s, WPACKET *pkt);
__owur int tls_construct_certificate_request(SSL *s, WPACKET *pkt);
__owur int tls_construct_server_done(SSL *s, WPACKET *pkt);
__owur MSG_PROCESS_RETURN tls_process_client_certificate(SSL *s, PACKET *pkt);
__owur MSG_PROCESS_RETURN tls_process_client_key_exchange(SSL *s, PACKET *pkt);
__owur WORK_STATE tls_post_process_client_key_exchange(SSL *s, WORK_STATE wst);
__owur MSG_PROCESS_RETURN tls_process_cert_verify(SSL *s, PACKET *pkt);
#ifndef OPENSSL_NO_NEXTPROTONEG
__owur MSG_PROCESS_RETURN tls_process_next_proto(SSL *s, PACKET *pkt);
#endif
__owur int tls_construct_new_session_ticket(SSL *s, WPACKET *pkt);
MSG_PROCESS_RETURN tls_process_end_of_early_data(SSL *s, PACKET *pkt);
/* Extension processing */
typedef enum ext_return_en {
EXT_RETURN_FAIL,
EXT_RETURN_SENT,
EXT_RETURN_NOT_SENT
} EXT_RETURN;
__owur int tls_validate_all_contexts(SSL *s, unsigned int thisctx,
RAW_EXTENSION *exts);
__owur int extension_is_relevant(SSL *s, unsigned int extctx,
unsigned int thisctx);
__owur int tls_collect_extensions(SSL *s, PACKET *packet, unsigned int context,
RAW_EXTENSION **res, size_t *len, int init);
__owur int tls_parse_extension(SSL *s, TLSEXT_INDEX idx, int context,
RAW_EXTENSION *exts, X509 *x, size_t chainidx);
__owur int tls_parse_all_extensions(SSL *s, int context, RAW_EXTENSION *exts,
X509 *x, size_t chainidx, int fin);
__owur int should_add_extension(SSL *s, unsigned int extctx,
unsigned int thisctx, int max_version);
__owur int tls_construct_extensions(SSL *s, WPACKET *pkt, unsigned int context,
X509 *x, size_t chainidx);
__owur int tls_psk_do_binder(SSL *s, const EVP_MD *md,
const unsigned char *msgstart,
size_t binderoffset, const unsigned char *binderin,
unsigned char *binderout,
SSL_SESSION *sess, int sign, int external);
/* Server Extension processing */
int tls_parse_ctos_renegotiate(SSL *s, PACKET *pkt, unsigned int context,
X509 *x, size_t chainidx);
int tls_parse_ctos_server_name(SSL *s, PACKET *pkt, unsigned int context,
X509 *x, size_t chainidx);
int tls_parse_ctos_maxfragmentlen(SSL *s, PACKET *pkt, unsigned int context,
X509 *x, size_t chainidx);
#ifndef OPENSSL_NO_SRP
int tls_parse_ctos_srp(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
size_t chainidx);
#endif
int tls_parse_ctos_early_data(SSL *s, PACKET *pkt, unsigned int context,
X509 *x, size_t chainidx);
#ifndef OPENSSL_NO_EC
int tls_parse_ctos_ec_pt_formats(SSL *s, PACKET *pkt, unsigned int context,
X509 *x, size_t chainidx);
int tls_parse_ctos_supported_groups(SSL *s, PACKET *pkt, unsigned int context,
X509 *x, size_t chainidxl);
#endif
int tls_parse_ctos_session_ticket(SSL *s, PACKET *pkt, unsigned int context,
X509 *x, size_t chainidx);
int tls_parse_ctos_sig_algs_cert(SSL *s, PACKET *pkt, unsigned int context,
X509 *x, size_t chainidx);
int tls_parse_ctos_sig_algs(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
size_t chainidx);
#ifndef OPENSSL_NO_OCSP
int tls_parse_ctos_status_request(SSL *s, PACKET *pkt, unsigned int context,
X509 *x, size_t chainidx);
#endif
#ifndef OPENSSL_NO_NEXTPROTONEG
int tls_parse_ctos_npn(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
size_t chainidx);
#endif
int tls_parse_ctos_alpn(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
size_t chainidx);
#ifndef OPENSSL_NO_SRTP
int tls_parse_ctos_use_srtp(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
size_t chainidx);
#endif
int tls_parse_ctos_etm(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
size_t chainidx);
int tls_parse_ctos_key_share(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
size_t chainidx);
int tls_parse_ctos_cookie(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
size_t chainidx);
int tls_parse_ctos_ems(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
size_t chainidx);
int tls_parse_ctos_psk_kex_modes(SSL *s, PACKET *pkt, unsigned int context,
X509 *x, size_t chainidx);
int tls_parse_ctos_psk(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
size_t chainidx);
int tls_parse_ctos_post_handshake_auth(SSL *, PACKET *pkt, unsigned int context,
X509 *x, size_t chainidx);
EXT_RETURN tls_construct_stoc_renegotiate(SSL *s, WPACKET *pkt,
unsigned int context, X509 *x,
size_t chainidx);
EXT_RETURN tls_construct_stoc_server_name(SSL *s, WPACKET *pkt,
unsigned int context, X509 *x,
size_t chainidx);
EXT_RETURN tls_construct_stoc_early_data(SSL *s, WPACKET *pkt,
unsigned int context, X509 *x,
size_t chainidx);
EXT_RETURN tls_construct_stoc_maxfragmentlen(SSL *s, WPACKET *pkt,
unsigned int context, X509 *x,
size_t chainidx);
#ifndef OPENSSL_NO_EC
EXT_RETURN tls_construct_stoc_ec_pt_formats(SSL *s, WPACKET *pkt,
unsigned int context, X509 *x,
size_t chainidx);
#endif
EXT_RETURN tls_construct_stoc_supported_groups(SSL *s, WPACKET *pkt,
unsigned int context, X509 *x,
size_t chainidx);
EXT_RETURN tls_construct_stoc_session_ticket(SSL *s, WPACKET *pkt,
unsigned int context, X509 *x,
size_t chainidx);
#ifndef OPENSSL_NO_OCSP
EXT_RETURN tls_construct_stoc_status_request(SSL *s, WPACKET *pkt,
unsigned int context, X509 *x,
size_t chainidx);
#endif
#ifndef OPENSSL_NO_NEXTPROTONEG
EXT_RETURN tls_construct_stoc_next_proto_neg(SSL *s, WPACKET *pkt,
unsigned int context, X509 *x,
size_t chainidx);
#endif
EXT_RETURN tls_construct_stoc_alpn(SSL *s, WPACKET *pkt, unsigned int context,
X509 *x, size_t chainidx);
#ifndef OPENSSL_NO_SRTP
EXT_RETURN tls_construct_stoc_use_srtp(SSL *s, WPACKET *pkt, unsigned int context,
X509 *x, size_t chainidx);
#endif
EXT_RETURN tls_construct_stoc_etm(SSL *s, WPACKET *pkt, unsigned int context,
X509 *x, size_t chainidx);
EXT_RETURN tls_construct_stoc_ems(SSL *s, WPACKET *pkt, unsigned int context,
X509 *x, size_t chainidx);
EXT_RETURN tls_construct_stoc_supported_versions(SSL *s, WPACKET *pkt,
unsigned int context, X509 *x,
size_t chainidx);
EXT_RETURN tls_construct_stoc_key_share(SSL *s, WPACKET *pkt,
unsigned int context, X509 *x,
size_t chainidx);
EXT_RETURN tls_construct_stoc_cookie(SSL *s, WPACKET *pkt, unsigned int context,
X509 *x, size_t chainidx);
/*
* Not in public headers as this is not an official extension. Only used when
* SSL_OP_CRYPTOPRO_TLSEXT_BUG is set.
*/
#define TLSEXT_TYPE_cryptopro_bug 0xfde8
EXT_RETURN tls_construct_stoc_cryptopro_bug(SSL *s, WPACKET *pkt,
unsigned int context, X509 *x,
size_t chainidx);
EXT_RETURN tls_construct_stoc_psk(SSL *s, WPACKET *pkt, unsigned int context,
X509 *x, size_t chainidx);
/* Client Extension processing */
EXT_RETURN tls_construct_ctos_renegotiate(SSL *s, WPACKET *pkt, unsigned int context,
X509 *x, size_t chainidx);
EXT_RETURN tls_construct_ctos_server_name(SSL *s, WPACKET *pkt, unsigned int context,
X509 *x, size_t chainidx);
EXT_RETURN tls_construct_ctos_maxfragmentlen(SSL *s, WPACKET *pkt, unsigned int context,
X509 *x, size_t chainidx);
#ifndef OPENSSL_NO_SRP
EXT_RETURN tls_construct_ctos_srp(SSL *s, WPACKET *pkt, unsigned int context, X509 *x,
size_t chainidx);
#endif
#ifndef OPENSSL_NO_EC
EXT_RETURN tls_construct_ctos_ec_pt_formats(SSL *s, WPACKET *pkt,
unsigned int context, X509 *x,
size_t chainidx);
EXT_RETURN tls_construct_ctos_supported_groups(SSL *s, WPACKET *pkt,
unsigned int context, X509 *x,
size_t chainidx);
#endif
EXT_RETURN tls_construct_ctos_early_data(SSL *s, WPACKET *pkt,
unsigned int context, X509 *x,
size_t chainidx);
EXT_RETURN tls_construct_ctos_session_ticket(SSL *s, WPACKET *pkt,
unsigned int context, X509 *x,
size_t chainidx);
EXT_RETURN tls_construct_ctos_sig_algs(SSL *s, WPACKET *pkt,
unsigned int context, X509 *x,
size_t chainidx);
#ifndef OPENSSL_NO_OCSP
EXT_RETURN tls_construct_ctos_status_request(SSL *s, WPACKET *pkt,
unsigned int context, X509 *x,
size_t chainidx);
#endif
#ifndef OPENSSL_NO_NEXTPROTONEG
EXT_RETURN tls_construct_ctos_npn(SSL *s, WPACKET *pkt, unsigned int context,
X509 *x, size_t chainidx);
#endif
EXT_RETURN tls_construct_ctos_alpn(SSL *s, WPACKET *pkt, unsigned int context,
X509 *x, size_t chainidx);
#ifndef OPENSSL_NO_SRTP
EXT_RETURN tls_construct_ctos_use_srtp(SSL *s, WPACKET *pkt, unsigned int context,
X509 *x, size_t chainidx);
#endif
EXT_RETURN tls_construct_ctos_etm(SSL *s, WPACKET *pkt, unsigned int context,
X509 *x, size_t chainidx);
#ifndef OPENSSL_NO_CT
EXT_RETURN tls_construct_ctos_sct(SSL *s, WPACKET *pkt, unsigned int context,
X509 *x, size_t chainidx);
#endif
EXT_RETURN tls_construct_ctos_ems(SSL *s, WPACKET *pkt, unsigned int context,
X509 *x, size_t chainidx);
EXT_RETURN tls_construct_ctos_supported_versions(SSL *s, WPACKET *pkt,
unsigned int context, X509 *x,
size_t chainidx);
EXT_RETURN tls_construct_ctos_key_share(SSL *s, WPACKET *pkt,
unsigned int context, X509 *x,
size_t chainidx);
EXT_RETURN tls_construct_ctos_psk_kex_modes(SSL *s, WPACKET *pkt,
unsigned int context, X509 *x,
size_t chainidx);
EXT_RETURN tls_construct_ctos_cookie(SSL *s, WPACKET *pkt, unsigned int context,
X509 *x, size_t chainidx);
EXT_RETURN tls_construct_ctos_padding(SSL *s, WPACKET *pkt,
unsigned int context, X509 *x,
size_t chainidx);
EXT_RETURN tls_construct_ctos_psk(SSL *s, WPACKET *pkt, unsigned int context,
X509 *x, size_t chainidx);
EXT_RETURN tls_construct_ctos_post_handshake_auth(SSL *s, WPACKET *pkt, unsigned int context,
X509 *x, size_t chainidx);
int tls_parse_stoc_renegotiate(SSL *s, PACKET *pkt, unsigned int context,
X509 *x, size_t chainidx);
int tls_parse_stoc_server_name(SSL *s, PACKET *pkt, unsigned int context,
X509 *x, size_t chainidx);
int tls_parse_stoc_early_data(SSL *s, PACKET *pkt, unsigned int context,
X509 *x, size_t chainidx);
int tls_parse_stoc_maxfragmentlen(SSL *s, PACKET *pkt, unsigned int context,
X509 *x, size_t chainidx);
#ifndef OPENSSL_NO_EC
int tls_parse_stoc_ec_pt_formats(SSL *s, PACKET *pkt, unsigned int context,
X509 *x, size_t chainidx);
#endif
int tls_parse_stoc_session_ticket(SSL *s, PACKET *pkt, unsigned int context,
X509 *x, size_t chainidx);
#ifndef OPENSSL_NO_OCSP
int tls_parse_stoc_status_request(SSL *s, PACKET *pkt, unsigned int context,
X509 *x, size_t chainidx);
#endif
#ifndef OPENSSL_NO_CT
int tls_parse_stoc_sct(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
size_t chainidx);
#endif
#ifndef OPENSSL_NO_NEXTPROTONEG
int tls_parse_stoc_npn(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
size_t chainidx);
#endif
int tls_parse_stoc_alpn(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
size_t chainidx);
#ifndef OPENSSL_NO_SRTP
int tls_parse_stoc_use_srtp(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
size_t chainidx);
#endif
int tls_parse_stoc_etm(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
size_t chainidx);
int tls_parse_stoc_ems(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
size_t chainidx);
int tls_parse_stoc_supported_versions(SSL *s, PACKET *pkt, unsigned int context,
X509 *x, size_t chainidx);
int tls_parse_stoc_key_share(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
size_t chainidx);
int tls_parse_stoc_cookie(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
size_t chainidx);
int tls_parse_stoc_psk(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
size_t chainidx);
int tls_handle_alpn(SSL *s);
int tls13_save_handshake_digest_for_pha(SSL *s);
int tls13_restore_handshake_digest_for_pha(SSL *s);
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