curl/lib/vtls/vtls.h
Stefan Eissing af22c2a546
vtls: localization of state data in filters
- almost all backend calls pass the Curl_cfilter intance instead of
   connectdata+sockindex
 - ssl_connect_data is remove from struct connectdata and made internal
   to vtls
 - ssl_connect_data is allocated in the added filter, kept at cf->ctx

 - added function to let a ssl filter access its ssl_primary_config and
   ssl_config_data this selects the propert subfields in conn and data,
   for filters added as plain or proxy
 - adjusted all backends to use the changed api
 - adjusted all backends to access config data via the exposed
   functions, no longer using conn or data directly

cfilter renames for clear purpose:

 - methods `Curl_conn_*(data, conn, sockindex)` work on the complete
   filter chain at `sockindex` and connection `conn`.
 - methods `Curl_cf_*(cf, ...)` work on a specific Curl_cfilter
   instance.
 - methods `Curl_conn_cf()` work on/with filter instances at a
   connection.
 - rebased and resolved some naming conflicts
 - hostname validation (und session lookup) on SECONDARY use the same
   name as on FIRST (again).

new debug macros and removing connectdata from function signatures where not
needed.

adapting schannel for new Curl_read_plain paramter.

Closes #9919
2022-11-22 14:25:50 +01:00

249 lines
9.8 KiB
C

#ifndef HEADER_CURL_VTLS_H
#define HEADER_CURL_VTLS_H
/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 1998 - 2022, Daniel Stenberg, <daniel@haxx.se>, 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_connect_data;
struct ssl_primary_config;
struct Curl_ssl_session;
#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"
/* Curl_multi SSL backend-specific data; declared differently by each SSL
backend */
struct multi_ssl_backend_data;
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
/* 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"
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);
curl_sslbackend Curl_ssl_backend(void);
#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);
/* init the SSL session ID cache */
CURLcode Curl_ssl_initsessions(struct Curl_easy *, size_t);
void Curl_ssl_version(char *buffer, size_t size);
int Curl_ssl_check_cxn(struct Curl_easy *data, 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);
/* 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(struct Curl_easy *data);
void Curl_free_multi_ssl_backend_data(struct multi_ssl_backend_data *mbackend);
#define SSL_SHUTDOWN_TIMEOUT 10000 /* ms */
CURLcode Curl_ssl_cfilter_add(struct Curl_easy *data,
int sockindex);
CURLcode Curl_ssl_cfilter_remove(struct Curl_easy *data,
int sockindex);
#ifndef CURL_DISABLE_PROXY
CURLcode Curl_ssl_cfilter_proxy_add(struct Curl_easy *data,
int sockindex);
#endif /* !CURL_DISABLE_PROXY */
/**
* Return TRUE iff the filter chain `sockindex` at connection `conn`
* is using/prepared for SSL encryption. This tests the presence of the
* necessary filters and not their connectedness.
*/
bool Curl_ssl_conn_is_ssl(struct Curl_easy *data,
int sockindex);
/**
* Get the SSL configuration that is used on the connection.
* This returns NULL if no SSL is configured.
* Otherwise it returns the config of the first (highest) one that is
* either connected, in handshake or about to start
* (e.g. all filters below it are connected). If SSL filters are present,
* but neither can start operating, return the config of the lowest one
* that will first come into effect when connecting.
*/
struct ssl_config_data *Curl_ssl_get_config(struct Curl_easy *data,
int sockindex);
/**
* Get the primary SSL configuration from the connection.
* This returns NULL if no SSL is configured.
* Otherwise it returns the config of the first (highest) one that is
* either connected, in handshake or about to start
* (e.g. all filters below it are connected). If SSL filters are present,
* but neither can start operating, return the config of the lowest one
* that will first come into effect when connecting.
*/
struct ssl_primary_config *
Curl_ssl_get_primary_config(struct Curl_easy *data,
struct connectdata *conn,
int sockindex);
/**
* 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, 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);
size_t Curl_ssl_get_backend_data_size(struct Curl_easy *data);
bool Curl_ssl_use(struct connectdata *conn, int sockindex);
#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_initsessions(x,y) CURLE_OK
#define Curl_ssl_check_cxn(d,x) 0
#define Curl_ssl_free_certinfo(x) Curl_nop_stmt
#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(a) FALSE
#define Curl_ssl_get_internals(a,b,c,d) NULL
#define Curl_ssl_supports(a,b) FALSE
#define Curl_ssl_get_backend_data_size(a) 0
#define Curl_ssl_use(a,b) FALSE
#define Curl_ssl_conn_is_ssl(a,b) FALSE
#define Curl_ssl_cfilter_add(a,b) CURLE_NOT_BUILT_IN
#define Curl_ssl_cfilter_proxy_add(a,b) CURLE_NOT_BUILT_IN
#define Curl_ssl_get_config(a,b) NULL
#define Curl_ssl_cfilter_remove(a,b) CURLE_OK
#endif
#endif /* HEADER_CURL_VTLS_H */