#ifndef HEADER_CURL_VTLS_H #define HEADER_CURL_VTLS_H /*************************************************************************** * _ _ ____ _ * Project ___| | | | _ \| | * / __| | | | |_) | | * | (__| |_| | _ <| |___ * \___|\___/|_| \_\_____| * * Copyright (C) 1998 - 2022, Daniel Stenberg, , et al. * * This software is licensed as described in the file COPYING, which * you should have received as part of this distribution. The terms * are also available at https://curl.se/docs/copyright.html. * * You may opt to use, copy, modify, merge, publish, distribute and/or sell * copies of the Software, and permit persons to whom the Software is * furnished to do so, under the terms of the COPYING file. * * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY * KIND, either express or implied. * * SPDX-License-Identifier: curl * ***************************************************************************/ #include "curl_setup.h" struct connectdata; struct ssl_connect_data; #define SSLSUPP_CA_PATH (1<<0) /* supports CAPATH */ #define SSLSUPP_CERTINFO (1<<1) /* supports CURLOPT_CERTINFO */ #define SSLSUPP_PINNEDPUBKEY (1<<2) /* supports CURLOPT_PINNEDPUBLICKEY */ #define SSLSUPP_SSL_CTX (1<<3) /* supports CURLOPT_SSL_CTX */ #define SSLSUPP_HTTPS_PROXY (1<<4) /* supports access via HTTPS proxies */ #define SSLSUPP_TLS13_CIPHERSUITES (1<<5) /* supports TLS 1.3 ciphersuites */ #define SSLSUPP_CAINFO_BLOB (1<<6) #define ALPN_ACCEPTED "ALPN: server accepted " #define VTLS_INFOF_NO_ALPN \ "ALPN: server did not agree on a protocol. Uses default." #define VTLS_INFOF_ALPN_OFFER_1STR \ "ALPN: offers %s" #define VTLS_INFOF_ALPN_ACCEPTED_1STR \ ALPN_ACCEPTED "%s" #define VTLS_INFOF_ALPN_ACCEPTED_LEN_1STR \ ALPN_ACCEPTED "%.*s" struct Curl_ssl { /* * This *must* be the first entry to allow returning the list of available * backends in curl_global_sslset(). */ curl_ssl_backend info; unsigned int supports; /* bitfield, see above */ size_t sizeof_ssl_backend_data; int (*init)(void); void (*cleanup)(void); size_t (*version)(char *buffer, size_t size); int (*check_cxn)(struct connectdata *cxn); int (*shut_down)(struct Curl_easy *data, struct connectdata *conn, int sockindex); bool (*data_pending)(const struct connectdata *conn, int connindex); /* return 0 if a find random is filled in */ CURLcode (*random)(struct Curl_easy *data, unsigned char *entropy, size_t length); bool (*cert_status_request)(void); CURLcode (*connect_blocking)(struct Curl_easy *data, struct connectdata *conn, int sockindex); CURLcode (*connect_nonblocking)(struct Curl_easy *data, struct connectdata *conn, int sockindex, bool *done); /* If the SSL backend wants to read or write on this connection during a handshake, set socks[0] to the connection's FIRSTSOCKET, and return a bitmap indicating read or write with GETSOCK_WRITESOCK(0) or GETSOCK_READSOCK(0). Otherwise return GETSOCK_BLANK. Mandatory. */ int (*getsock)(struct connectdata *conn, curl_socket_t *socks); void *(*get_internals)(struct ssl_connect_data *connssl, CURLINFO info); void (*close_one)(struct Curl_easy *data, struct connectdata *conn, int sockindex); void (*close_all)(struct Curl_easy *data); void (*session_free)(void *ptr); CURLcode (*set_engine)(struct Curl_easy *data, const char *engine); CURLcode (*set_engine_default)(struct Curl_easy *data); struct curl_slist *(*engines_list)(struct Curl_easy *data); bool (*false_start)(void); CURLcode (*sha256sum)(const unsigned char *input, size_t inputlen, unsigned char *sha256sum, size_t sha256sumlen); bool (*associate_connection)(struct Curl_easy *data, struct connectdata *conn, int sockindex); void (*disassociate_connection)(struct Curl_easy *data, int sockindex); }; #ifdef USE_SSL extern const struct Curl_ssl *Curl_ssl; #endif int Curl_none_init(void); void Curl_none_cleanup(void); int Curl_none_shutdown(struct Curl_easy *data, struct connectdata *conn, int sockindex); int Curl_none_check_cxn(struct connectdata *conn); CURLcode Curl_none_random(struct Curl_easy *data, unsigned char *entropy, size_t length); void Curl_none_close_all(struct Curl_easy *data); void Curl_none_session_free(void *ptr); bool Curl_none_data_pending(const struct connectdata *conn, int connindex); bool Curl_none_cert_status_request(void); CURLcode Curl_none_set_engine(struct Curl_easy *data, const char *engine); CURLcode Curl_none_set_engine_default(struct Curl_easy *data); struct curl_slist *Curl_none_engines_list(struct Curl_easy *data); bool Curl_none_false_start(void); bool Curl_ssl_tls13_ciphersuites(void); CURLsslset Curl_init_sslset_nolock(curl_sslbackend id, const char *name, const curl_ssl_backend ***avail); #include "openssl.h" /* OpenSSL versions */ #include "gtls.h" /* GnuTLS versions */ #include "nssg.h" /* NSS versions */ #include "gskit.h" /* Global Secure ToolKit versions */ #include "wolfssl.h" /* wolfSSL versions */ #include "schannel.h" /* Schannel SSPI version */ #include "sectransp.h" /* SecureTransport (Darwin) version */ #include "mbedtls.h" /* mbedTLS versions */ #include "bearssl.h" /* BearSSL versions */ #include "rustls.h" /* rustls versions */ #ifndef MAX_PINNED_PUBKEY_SIZE #define MAX_PINNED_PUBKEY_SIZE 1048576 /* 1MB */ #endif #ifndef CURL_SHA256_DIGEST_LENGTH #define CURL_SHA256_DIGEST_LENGTH 32 /* fixed size */ #endif /* see https://www.iana.org/assignments/tls-extensiontype-values/ */ #define ALPN_HTTP_1_1_LENGTH 8 #define ALPN_HTTP_1_1 "http/1.1" #define ALPN_H2_LENGTH 2 #define ALPN_H2 "h2" /* set of helper macros for the backends to access the correct fields. For the proxy or for the remote host - to properly support HTTPS proxy */ #ifndef CURL_DISABLE_PROXY #define SSL_IS_PROXY() \ (CURLPROXY_HTTPS == conn->http_proxy.proxytype && \ ssl_connection_complete != \ conn->proxy_ssl[conn->sock[SECONDARYSOCKET] == \ CURL_SOCKET_BAD ? FIRSTSOCKET : SECONDARYSOCKET].state) #define SSL_SET_OPTION(var) \ (SSL_IS_PROXY() ? data->set.proxy_ssl.var : data->set.ssl.var) #define SSL_SET_OPTION_LVALUE(var) \ (*(SSL_IS_PROXY() ? &data->set.proxy_ssl.var : &data->set.ssl.var)) #define SSL_CONN_CONFIG(var) \ (SSL_IS_PROXY() ? conn->proxy_ssl_config.var : conn->ssl_config.var) #define SSL_HOST_NAME() \ (SSL_IS_PROXY() ? conn->http_proxy.host.name : conn->host.name) #define SSL_HOST_DISPNAME() \ (SSL_IS_PROXY() ? conn->http_proxy.host.dispname : conn->host.dispname) #define SSL_HOST_PORT() \ (SSL_IS_PROXY() ? conn->port : conn->remote_port) #define SSL_PINNED_PUB_KEY() (SSL_IS_PROXY() \ ? data->set.str[STRING_SSL_PINNEDPUBLICKEY_PROXY] \ : data->set.str[STRING_SSL_PINNEDPUBLICKEY]) #else #define SSL_IS_PROXY() FALSE #define SSL_SET_OPTION(var) data->set.ssl.var #define SSL_SET_OPTION_LVALUE(var) data->set.ssl.var #define SSL_CONN_CONFIG(var) conn->ssl_config.var #define SSL_HOST_NAME() conn->host.name #define SSL_HOST_DISPNAME() conn->host.dispname #define SSL_HOST_PORT() conn->remote_port #define SSL_PINNED_PUB_KEY() \ data->set.str[STRING_SSL_PINNEDPUBLICKEY] #endif char *Curl_ssl_snihost(struct Curl_easy *data, const char *host, size_t *olen); bool Curl_ssl_config_matches(struct ssl_primary_config *data, struct ssl_primary_config *needle); bool Curl_clone_primary_ssl_config(struct ssl_primary_config *source, struct ssl_primary_config *dest); void Curl_free_primary_ssl_config(struct ssl_primary_config *sslc); /* An implementation of the getsock field of Curl_ssl that relies on the ssl_connect_state enum. Asks for read or write depending on whether conn->state is ssl_connect_2_reading or ssl_connect_2_writing. */ int Curl_ssl_getsock(struct connectdata *conn, curl_socket_t *socks); curl_sslbackend Curl_ssl_backend(void); #ifdef USE_SSL int Curl_ssl_init(void); void Curl_ssl_cleanup(void); CURLcode Curl_ssl_connect(struct Curl_easy *data, struct connectdata *conn, int sockindex); CURLcode Curl_ssl_connect_nonblocking(struct Curl_easy *data, struct connectdata *conn, bool isproxy, int sockindex, bool *done); /* tell the SSL stuff to close down all open information regarding connections (and thus session ID caching etc) */ void Curl_ssl_close_all(struct Curl_easy *data); void Curl_ssl_close(struct Curl_easy *data, struct connectdata *conn, int sockindex); CURLcode Curl_ssl_shutdown(struct Curl_easy *data, struct connectdata *conn, int sockindex); CURLcode Curl_ssl_set_engine(struct Curl_easy *data, const char *engine); /* Sets engine as default for all SSL operations */ CURLcode Curl_ssl_set_engine_default(struct Curl_easy *data); struct curl_slist *Curl_ssl_engines_list(struct Curl_easy *data); /* init the SSL session ID cache */ CURLcode Curl_ssl_initsessions(struct Curl_easy *, size_t); void Curl_ssl_version(char *buffer, size_t size); bool Curl_ssl_data_pending(const struct connectdata *conn, int connindex); int Curl_ssl_check_cxn(struct connectdata *conn); /* Certificate information list handling. */ void Curl_ssl_free_certinfo(struct Curl_easy *data); CURLcode Curl_ssl_init_certinfo(struct Curl_easy *data, int num); CURLcode Curl_ssl_push_certinfo_len(struct Curl_easy *data, int certnum, const char *label, const char *value, size_t valuelen); CURLcode Curl_ssl_push_certinfo(struct Curl_easy *data, int certnum, const char *label, const char *value); /* Functions to be used by SSL library adaptation functions */ /* Lock session cache mutex. * Call this before calling other Curl_ssl_*session* functions * Caller should unlock this mutex as soon as possible, as it may block * other SSL connection from making progress. * The purpose of explicitly locking SSL session cache data is to allow * individual SSL engines to manage session lifetime in their specific way. */ void Curl_ssl_sessionid_lock(struct Curl_easy *data); /* Unlock session cache mutex */ void Curl_ssl_sessionid_unlock(struct Curl_easy *data); /* extract a session ID * Sessionid mutex must be locked (see Curl_ssl_sessionid_lock). * Caller must make sure that the ownership of returned sessionid object * is properly taken (e.g. its refcount is incremented * under sessionid mutex). */ bool Curl_ssl_getsessionid(struct Curl_easy *data, struct connectdata *conn, const bool isProxy, void **ssl_sessionid, size_t *idsize, /* set 0 if unknown */ int sockindex); /* add a new session ID * Sessionid mutex must be locked (see Curl_ssl_sessionid_lock). * Caller must ensure that it has properly shared ownership of this sessionid * object with cache (e.g. incrementing refcount on success) */ CURLcode Curl_ssl_addsessionid(struct Curl_easy *data, struct connectdata *conn, const bool isProxy, void *ssl_sessionid, size_t idsize, int sockindex, bool *added); /* Kill a single session ID entry in the cache * Sessionid mutex must be locked (see Curl_ssl_sessionid_lock). * This will call engine-specific curlssl_session_free function, which must * take sessionid object ownership from sessionid cache * (e.g. decrement refcount). */ void Curl_ssl_kill_session(struct Curl_ssl_session *session); /* delete a session from the cache * Sessionid mutex must be locked (see Curl_ssl_sessionid_lock). * This will call engine-specific curlssl_session_free function, which must * take sessionid object ownership from sessionid cache * (e.g. decrement refcount). */ void Curl_ssl_delsessionid(struct Curl_easy *data, void *ssl_sessionid); /* get N random bytes into the buffer */ CURLcode Curl_ssl_random(struct Curl_easy *data, unsigned char *buffer, size_t length); /* Check pinned public key. */ CURLcode Curl_pin_peer_pubkey(struct Curl_easy *data, const char *pinnedpubkey, const unsigned char *pubkey, size_t pubkeylen); bool Curl_ssl_cert_status_request(void); bool Curl_ssl_false_start(void); void Curl_ssl_associate_conn(struct Curl_easy *data, struct connectdata *conn); void Curl_ssl_detach_conn(struct Curl_easy *data, struct connectdata *conn); #define SSL_SHUTDOWN_TIMEOUT 10000 /* ms */ #else /* if not USE_SSL */ /* When SSL support is not present, just define away these function calls */ #define Curl_ssl_init() 1 #define Curl_ssl_cleanup() Curl_nop_stmt #define Curl_ssl_connect(x,y,z) CURLE_NOT_BUILT_IN #define Curl_ssl_close_all(x) Curl_nop_stmt #define Curl_ssl_close(x,y,z) Curl_nop_stmt #define Curl_ssl_shutdown(x,y,z) CURLE_NOT_BUILT_IN #define Curl_ssl_set_engine(x,y) CURLE_NOT_BUILT_IN #define Curl_ssl_set_engine_default(x) CURLE_NOT_BUILT_IN #define Curl_ssl_engines_list(x) NULL #define Curl_ssl_send(a,b,c,d,e) -1 #define Curl_ssl_recv(a,b,c,d,e) -1 #define Curl_ssl_initsessions(x,y) CURLE_OK #define Curl_ssl_data_pending(x,y) 0 #define Curl_ssl_check_cxn(x) 0 #define Curl_ssl_free_certinfo(x) Curl_nop_stmt #define Curl_ssl_connect_nonblocking(x,y,z,w,a) CURLE_NOT_BUILT_IN #define Curl_ssl_kill_session(x) Curl_nop_stmt #define Curl_ssl_random(x,y,z) ((void)x, CURLE_NOT_BUILT_IN) #define Curl_ssl_cert_status_request() FALSE #define Curl_ssl_false_start() FALSE #define Curl_ssl_tls13_ciphersuites() FALSE #define Curl_ssl_associate_conn(a,b) Curl_nop_stmt #define Curl_ssl_detach_conn(a,b) Curl_nop_stmt #endif #endif /* HEADER_CURL_VTLS_H */