#ifndef HEADER_CURL_VTLS_H #define HEADER_CURL_VTLS_H /*************************************************************************** * _ _ ____ _ * Project ___| | | | _ \| | * / __| | | | |_) | | * | (__| |_| | _ <| |___ * \___|\___/|_| \_\_____| * * Copyright (C) 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_config_data; struct ssl_primary_config; struct Curl_cfilter; struct Curl_easy; struct dynbuf; #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 SSLSUPP_ECH (1<<7) #define SSLSUPP_CA_CACHE (1<<8) #define SSLSUPP_CIPHER_LIST (1<<9) /* supports TLS 1.0-1.2 ciphersuites */ #ifdef USE_ECH # include "curl_base64.h" # define ECH_ENABLED(__data__) \ (__data__->set.tls_ech && \ !(__data__->set.tls_ech & CURLECH_DISABLE)\ ) #endif /* USE_ECH */ #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: curl offers %s" #define VTLS_INFOF_ALPN_ACCEPTED \ ALPN_ACCEPTED "%.*s" #define VTLS_INFOF_NO_ALPN_DEFERRED \ "ALPN: deferred handshake for early data without specific protocol." #define VTLS_INFOF_ALPN_DEFERRED \ "ALPN: deferred handshake for early data using '%.*s'." /* IETF defined version numbers used in TLS protocol negotiation */ #define CURL_IETF_PROTO_UNKNOWN 0x0 #define CURL_IETF_PROTO_SSL3 0x0300 #define CURL_IETF_PROTO_TLS1 0x0301 #define CURL_IETF_PROTO_TLS1_1 0x0302 #define CURL_IETF_PROTO_TLS1_2 0x0303 #define CURL_IETF_PROTO_TLS1_3 0x0304 #define CURL_IETF_PROTO_DTLS1 0xFEFF #define CURL_IETF_PROTO_DTLS1_2 0xFEFD typedef enum { CURL_SSL_PEER_DNS, CURL_SSL_PEER_IPV4, CURL_SSL_PEER_IPV6 } ssl_peer_type; struct ssl_peer { char *hostname; /* hostname for verification */ char *dispname; /* display version of hostname */ char *sni; /* SNI version of hostname or NULL if not usable */ char *scache_key; /* for lookups in session cache */ ssl_peer_type type; /* type of the peer information */ int port; /* port we are talking to */ int transport; /* one of TRNSPRT_* defines */ }; CURLsslset Curl_init_sslset_nolock(curl_sslbackend id, const char *name, const curl_ssl_backend ***avail); #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 curl_sslbackend Curl_ssl_backend(void); /** * Init ssl config for a new easy handle. */ void Curl_ssl_easy_config_init(struct Curl_easy *data); /** * Init the `data->set.ssl` and `data->set.proxy_ssl` for * connection matching use. */ CURLcode Curl_ssl_easy_config_complete(struct Curl_easy *data); /** * Init SSL configs (main + proxy) for a new connection from the easy handle. */ CURLcode Curl_ssl_conn_config_init(struct Curl_easy *data, struct connectdata *conn); /** * Free allocated resources in SSL configs (main + proxy) for * the given connection. */ void Curl_ssl_conn_config_cleanup(struct connectdata *conn); /** * Return TRUE iff SSL configuration from `data` is functionally the * same as the one on `candidate`. * @param proxy match the proxy SSL config or the main one */ bool Curl_ssl_conn_config_match(struct Curl_easy *data, struct connectdata *candidate, bool proxy); /* Update certain connection SSL config flags after they have * been changed on the easy handle. Will work for `verifypeer`, * `verifyhost` and `verifystatus`. */ void Curl_ssl_conn_config_update(struct Curl_easy *data, bool for_proxy); /** * Init SSL peer information for filter. Can be called repeatedly. */ CURLcode Curl_ssl_peer_init(struct ssl_peer *peer, struct Curl_cfilter *cf, const char *tls_id, int transport); /** * Free all allocated data and reset peer information. */ void Curl_ssl_peer_cleanup(struct ssl_peer *peer); #ifdef USE_SSL int Curl_ssl_init(void); void Curl_ssl_cleanup(void); /* 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); 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); void Curl_ssl_version(char *buffer, size_t size); /* Certificate information list handling. */ #define CURL_X509_STR_MAX 100000 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 */ /* 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); /* The maximum size of the SSL channel binding is 85 bytes, as defined in * RFC 5929, Section 4.1. The 'tls-server-end-point:' prefix is 21 bytes long, * and SHA-512 is the longest supported hash algorithm, with a digest length of * 64 bytes. * The maximum size of the channel binding is therefore 21 + 64 = 85 bytes. */ #define SSL_CB_MAX_SIZE 85 /* Return the tls-server-end-point channel binding, including the * 'tls-server-end-point:' prefix. * If successful, the data is written to the dynbuf, and CURLE_OK is returned. * The dynbuf MUST HAVE a minimum toobig size of SSL_CB_MAX_SIZE. * If the dynbuf is too small, CURLE_OUT_OF_MEMORY is returned. * If channel binding is not supported, binding stays empty and CURLE_OK is * returned. */ CURLcode Curl_ssl_get_channel_binding(struct Curl_easy *data, int sockindex, struct dynbuf *binding); #define SSL_SHUTDOWN_TIMEOUT 10000 /* ms */ CURLcode Curl_ssl_cfilter_add(struct Curl_easy *data, struct connectdata *conn, int sockindex); CURLcode Curl_cf_ssl_insert_after(struct Curl_cfilter *cf_at, struct Curl_easy *data); CURLcode Curl_ssl_cfilter_remove(struct Curl_easy *data, int sockindex, bool send_shutdown); #ifndef CURL_DISABLE_PROXY CURLcode Curl_cf_ssl_proxy_insert_after(struct Curl_cfilter *cf_at, struct Curl_easy *data); #endif /* !CURL_DISABLE_PROXY */ /** * True iff the underlying SSL implementation supports the option. * Option is one of the defined SSLSUPP_* values. * `data` maybe NULL for the features of the default implementation. */ bool Curl_ssl_supports(struct Curl_easy *data, unsigned int ssl_option); /** * Get the internal ssl instance (like OpenSSL's SSL*) from the filter * chain at `sockindex` of type specified by `info`. * For `n` == 0, the first active (top down) instance is returned. * 1 gives the second active, etc. * NULL is returned when no active SSL filter is present. */ void *Curl_ssl_get_internals(struct Curl_easy *data, int sockindex, CURLINFO info, int n); /** * Get the ssl_config_data in `data` that is relevant for cfilter `cf`. */ struct ssl_config_data *Curl_ssl_cf_get_config(struct Curl_cfilter *cf, struct Curl_easy *data); /** * Get the primary config relevant for the filter from its connection. */ struct ssl_primary_config * Curl_ssl_cf_get_primary_config(struct Curl_cfilter *cf); extern struct Curl_cftype Curl_cft_ssl; #ifndef CURL_DISABLE_PROXY extern struct Curl_cftype Curl_cft_ssl_proxy; #endif #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_close_all(x) Curl_nop_stmt #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_free_certinfo(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_get_internals(a,b,c,d) NULL #define Curl_ssl_supports(a,b) FALSE #define Curl_ssl_cfilter_add(a,b,c) CURLE_NOT_BUILT_IN #define Curl_ssl_cfilter_remove(a,b,c) CURLE_OK #define Curl_ssl_cf_get_config(a,b) NULL #define Curl_ssl_cf_get_primary_config(a) NULL #endif #endif /* HEADER_CURL_VTLS_H */