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glib/gio/gtlsconnection.c
Michael Catanzaro 5e6c2e1e2c gtlsconnection: use a vfunc to implement get_negotiated_protocol() 
The current code is unsafe to use from multiple threads at once.
GIOStream functions like this are supposed to be semi-threadsafe. It's
allowed for them to be called on both a reader thread and a writer
thread at the same time. Of course, it's still tricky and dangerous,
because it's only *really* threadsafe if the handshake has finished,
and API users have no plausible way to know that because the API
does not require performing an explicit handshake operation. But that's
a glib-networking problem. We can at least avoid the most obvious
threadsafety issue here in the API layer.

Note that we'll need to implement the new vfunc in glib-networking for
this to actually work.

Fixes #2393
2021-06-21 09:28:23 -05:00

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/* GIO - GLib Input, Output and Streaming Library
*
* Copyright © 2010 Red Hat, Inc
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General
* Public License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include "glib.h"
#include "gtlsconnection.h"
#include "gcancellable.h"
#include "gioenumtypes.h"
#include "gsocket.h"
#include "gtlsbackend.h"
#include "gtlscertificate.h"
#include "gtlsclientconnection.h"
#include "gtlsdatabase.h"
#include "gtlsinteraction.h"
#include "glibintl.h"
#include "gmarshal-internal.h"
/**
* SECTION:gtlsconnection
* @short_description: TLS connection type
* @include: gio/gio.h
*
* #GTlsConnection is the base TLS connection class type, which wraps
* a #GIOStream and provides TLS encryption on top of it. Its
* subclasses, #GTlsClientConnection and #GTlsServerConnection,
* implement client-side and server-side TLS, respectively.
*
* For DTLS (Datagram TLS) support, see #GDtlsConnection.
*
* Since: 2.28
*/
/**
* GTlsConnection:
*
* Abstract base class for the backend-specific #GTlsClientConnection
* and #GTlsServerConnection types.
*
* Since: 2.28
*/
G_DEFINE_ABSTRACT_TYPE (GTlsConnection, g_tls_connection, G_TYPE_IO_STREAM)
static void g_tls_connection_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec);
static void g_tls_connection_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec);
enum {
ACCEPT_CERTIFICATE,
LAST_SIGNAL
};
static guint signals[LAST_SIGNAL] = { 0 };
enum {
PROP_0,
PROP_BASE_IO_STREAM,
PROP_REQUIRE_CLOSE_NOTIFY,
PROP_REHANDSHAKE_MODE,
PROP_USE_SYSTEM_CERTDB,
PROP_DATABASE,
PROP_INTERACTION,
PROP_CERTIFICATE,
PROP_PEER_CERTIFICATE,
PROP_PEER_CERTIFICATE_ERRORS,
PROP_ADVERTISED_PROTOCOLS,
PROP_NEGOTIATED_PROTOCOL,
PROP_PROTOCOL_VERSION,
PROP_CIPHERSUITE_NAME,
};
static void
g_tls_connection_class_init (GTlsConnectionClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
gobject_class->get_property = g_tls_connection_get_property;
gobject_class->set_property = g_tls_connection_set_property;
/**
* GTlsConnection:base-io-stream:
*
* The #GIOStream that the connection wraps. The connection holds a reference
* to this stream, and may run operations on the stream from other threads
* throughout its lifetime. Consequently, after the #GIOStream has been
* constructed, application code may only run its own operations on this
* stream when no #GIOStream operations are running.
*
* Since: 2.28
*/
g_object_class_install_property (gobject_class, PROP_BASE_IO_STREAM,
g_param_spec_object ("base-io-stream",
P_("Base IOStream"),
P_("The GIOStream that the connection wraps"),
G_TYPE_IO_STREAM,
G_PARAM_READWRITE |
G_PARAM_CONSTRUCT_ONLY |
G_PARAM_STATIC_STRINGS));
/**
* GTlsConnection:use-system-certdb:
*
* Whether or not the system certificate database will be used to
* verify peer certificates. See
* g_tls_connection_set_use_system_certdb().
*
* Deprecated: 2.30: Use GTlsConnection:database instead
*/
g_object_class_install_property (gobject_class, PROP_USE_SYSTEM_CERTDB,
g_param_spec_boolean ("use-system-certdb",
P_("Use system certificate database"),
P_("Whether to verify peer certificates against the system certificate database"),
TRUE,
G_PARAM_READWRITE |
G_PARAM_CONSTRUCT |
G_PARAM_STATIC_STRINGS |
G_PARAM_DEPRECATED));
/**
* GTlsConnection:database: (nullable)
*
* The certificate database to use when verifying this TLS connection.
* If no certificate database is set, then the default database will be
* used. See g_tls_backend_get_default_database().
*
* Since: 2.30
*/
g_object_class_install_property (gobject_class, PROP_DATABASE,
g_param_spec_object ("database",
P_("Database"),
P_("Certificate database to use for looking up or verifying certificates"),
G_TYPE_TLS_DATABASE,
G_PARAM_READWRITE |
G_PARAM_STATIC_STRINGS));
/**
* GTlsConnection:interaction: (nullable)
*
* A #GTlsInteraction object to be used when the connection or certificate
* database need to interact with the user. This will be used to prompt the
* user for passwords where necessary.
*
* Since: 2.30
*/
g_object_class_install_property (gobject_class, PROP_INTERACTION,
g_param_spec_object ("interaction",
P_("Interaction"),
P_("Optional object for user interaction"),
G_TYPE_TLS_INTERACTION,
G_PARAM_READWRITE |
G_PARAM_STATIC_STRINGS));
/**
* GTlsConnection:require-close-notify:
*
* Whether or not proper TLS close notification is required.
* See g_tls_connection_set_require_close_notify().
*
* Since: 2.28
*/
g_object_class_install_property (gobject_class, PROP_REQUIRE_CLOSE_NOTIFY,
g_param_spec_boolean ("require-close-notify",
P_("Require close notify"),
P_("Whether to require proper TLS close notification"),
TRUE,
G_PARAM_READWRITE |
G_PARAM_CONSTRUCT |
G_PARAM_STATIC_STRINGS));
/**
* GTlsConnection:rehandshake-mode:
*
* The rehandshaking mode. See
* g_tls_connection_set_rehandshake_mode().
*
* Since: 2.28
*
* Deprecated: 2.60: The rehandshake mode is ignored.
*/
g_object_class_install_property (gobject_class, PROP_REHANDSHAKE_MODE,
g_param_spec_enum ("rehandshake-mode",
P_("Rehandshake mode"),
P_("When to allow rehandshaking"),
G_TYPE_TLS_REHANDSHAKE_MODE,
G_TLS_REHANDSHAKE_SAFELY,
G_PARAM_READWRITE |
G_PARAM_CONSTRUCT |
G_PARAM_STATIC_STRINGS |
G_PARAM_DEPRECATED));
/**
* GTlsConnection:certificate:
*
* The connection's certificate; see
* g_tls_connection_set_certificate().
*
* Since: 2.28
*/
g_object_class_install_property (gobject_class, PROP_CERTIFICATE,
g_param_spec_object ("certificate",
P_("Certificate"),
P_("The connection’s certificate"),
G_TYPE_TLS_CERTIFICATE,
G_PARAM_READWRITE |
G_PARAM_STATIC_STRINGS));
/**
* GTlsConnection:peer-certificate: (nullable)
*
* The connection's peer's certificate, after the TLS handshake has
* completed or failed. Note in particular that this is not yet set
* during the emission of #GTlsConnection::accept-certificate.
*
* (You can watch for a #GObject::notify signal on this property to
* detect when a handshake has occurred.)
*
* Since: 2.28
*/
g_object_class_install_property (gobject_class, PROP_PEER_CERTIFICATE,
g_param_spec_object ("peer-certificate",
P_("Peer Certificate"),
P_("The connection’s peer’s certificate"),
G_TYPE_TLS_CERTIFICATE,
G_PARAM_READABLE |
G_PARAM_STATIC_STRINGS));
/**
* GTlsConnection:peer-certificate-errors:
*
* The errors noticed while verifying
* #GTlsConnection:peer-certificate. Normally this should be 0, but
* it may not be if #GTlsClientConnection:validation-flags is not
* %G_TLS_CERTIFICATE_VALIDATE_ALL, or if
* #GTlsConnection::accept-certificate overrode the default
* behavior.
*
* Since: 2.28
*/
g_object_class_install_property (gobject_class, PROP_PEER_CERTIFICATE_ERRORS,
g_param_spec_flags ("peer-certificate-errors",
P_("Peer Certificate Errors"),
P_("Errors found with the peer’s certificate"),
G_TYPE_TLS_CERTIFICATE_FLAGS,
0,
G_PARAM_READABLE |
G_PARAM_STATIC_STRINGS));
/**
* GTlsConnection:advertised-protocols: (nullable)
*
* The list of application-layer protocols that the connection
* advertises that it is willing to speak. See
* g_tls_connection_set_advertised_protocols().
*
* Since: 2.60
*/
g_object_class_install_property (gobject_class, PROP_ADVERTISED_PROTOCOLS,
g_param_spec_boxed ("advertised-protocols",
P_("Advertised Protocols"),
P_("Application-layer protocols available on this connection"),
G_TYPE_STRV,
G_PARAM_READWRITE |
G_PARAM_STATIC_STRINGS));
/**
* GTlsConnection:negotiated-protocol:
*
* The application-layer protocol negotiated during the TLS
* handshake. See g_tls_connection_get_negotiated_protocol().
*
* Since: 2.60
*/
g_object_class_install_property (gobject_class, PROP_NEGOTIATED_PROTOCOL,
g_param_spec_string ("negotiated-protocol",
P_("Negotiated Protocol"),
P_("Application-layer protocol negotiated for this connection"),
NULL,
G_PARAM_READABLE |
G_PARAM_STATIC_STRINGS));
/**
* GTlsConnection:protocol-version:
*
* The TLS protocol version in use. See g_tls_connection_get_protocol_version().
*
* Since: 2.70
*/
g_object_class_install_property (gobject_class, PROP_PROTOCOL_VERSION,
g_param_spec_enum ("protocol-version",
P_("Protocol Version"),
P_("TLS protocol version negotiated for this connection"),
G_TYPE_TLS_PROTOCOL_VERSION,
G_TLS_PROTOCOL_VERSION_UNKNOWN,
G_PARAM_READABLE |
G_PARAM_STATIC_STRINGS));
/**
* GTlsConnection:ciphersuite-name: (nullable)
*
* The name of the TLS ciphersuite in use. See g_tls_connection_get_ciphersuite_name().
*
* Since: 2.70
*/
g_object_class_install_property (gobject_class, PROP_CIPHERSUITE_NAME,
g_param_spec_string ("ciphersuite-name",
P_("Ciphersuite Name"),
P_("Name of ciphersuite negotiated for this connection"),
NULL,
G_PARAM_READABLE |
G_PARAM_STATIC_STRINGS));
/**
* GTlsConnection::accept-certificate:
* @conn: a #GTlsConnection
* @peer_cert: the peer's #GTlsCertificate
* @errors: the problems with @peer_cert.
*
* Emitted during the TLS handshake after the peer certificate has
* been received. You can examine @peer_cert's certification path by
* calling g_tls_certificate_get_issuer() on it.
*
* For a client-side connection, @peer_cert is the server's
* certificate, and the signal will only be emitted if the
* certificate was not acceptable according to @conn's
* #GTlsClientConnection:validation_flags. If you would like the
* certificate to be accepted despite @errors, return %TRUE from the
* signal handler. Otherwise, if no handler accepts the certificate,
* the handshake will fail with %G_TLS_ERROR_BAD_CERTIFICATE.
*
* For a server-side connection, @peer_cert is the certificate
* presented by the client, if this was requested via the server's
* #GTlsServerConnection:authentication_mode. On the server side,
* the signal is always emitted when the client presents a
* certificate, and the certificate will only be accepted if a
* handler returns %TRUE.
*
* Note that if this signal is emitted as part of asynchronous I/O
* in the main thread, then you should not attempt to interact with
* the user before returning from the signal handler. If you want to
* let the user decide whether or not to accept the certificate, you
* would have to return %FALSE from the signal handler on the first
* attempt, and then after the connection attempt returns a
* %G_TLS_ERROR_BAD_CERTIFICATE, you can interact with the user, and
* if the user decides to accept the certificate, remember that fact,
* create a new connection, and return %TRUE from the signal handler
* the next time.
*
* If you are doing I/O in another thread, you do not
* need to worry about this, and can simply block in the signal
* handler until the UI thread returns an answer.
*
* Returns: %TRUE to accept @peer_cert (which will also
* immediately end the signal emission). %FALSE to allow the signal
* emission to continue, which will cause the handshake to fail if
* no one else overrides it.
*
* Since: 2.28
*/
signals[ACCEPT_CERTIFICATE] =
g_signal_new (I_("accept-certificate"),
G_TYPE_TLS_CONNECTION,
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GTlsConnectionClass, accept_certificate),
g_signal_accumulator_true_handled, NULL,
_g_cclosure_marshal_BOOLEAN__OBJECT_FLAGS,
G_TYPE_BOOLEAN, 2,
G_TYPE_TLS_CERTIFICATE,
G_TYPE_TLS_CERTIFICATE_FLAGS);
g_signal_set_va_marshaller (signals[ACCEPT_CERTIFICATE],
G_TYPE_FROM_CLASS (klass),
_g_cclosure_marshal_BOOLEAN__OBJECT_FLAGSv);
}
static void
g_tls_connection_init (GTlsConnection *conn)
{
}
static void
g_tls_connection_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
}
static void
g_tls_connection_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
}
/**
* g_tls_connection_set_use_system_certdb:
* @conn: a #GTlsConnection
* @use_system_certdb: whether to use the system certificate database
*
* Sets whether @conn uses the system certificate database to verify
* peer certificates. This is %TRUE by default. If set to %FALSE, then
* peer certificate validation will always set the
* %G_TLS_CERTIFICATE_UNKNOWN_CA error (meaning
* #GTlsConnection::accept-certificate will always be emitted on
* client-side connections, unless that bit is not set in
* #GTlsClientConnection:validation-flags).
*
* Deprecated: 2.30: Use g_tls_connection_set_database() instead
*/
void
g_tls_connection_set_use_system_certdb (GTlsConnection *conn,
gboolean use_system_certdb)
{
g_return_if_fail (G_IS_TLS_CONNECTION (conn));
g_object_set (G_OBJECT (conn),
"use-system-certdb", use_system_certdb,
NULL);
}
/**
* g_tls_connection_get_use_system_certdb:
* @conn: a #GTlsConnection
*
* Gets whether @conn uses the system certificate database to verify
* peer certificates. See g_tls_connection_set_use_system_certdb().
*
* Returns: whether @conn uses the system certificate database
*
* Deprecated: 2.30: Use g_tls_connection_get_database() instead
*/
gboolean
g_tls_connection_get_use_system_certdb (GTlsConnection *conn)
{
gboolean use_system_certdb;
g_return_val_if_fail (G_IS_TLS_CONNECTION (conn), TRUE);
g_object_get (G_OBJECT (conn),
"use-system-certdb", &use_system_certdb,
NULL);
return use_system_certdb;
}
/**
* g_tls_connection_set_database:
* @conn: a #GTlsConnection
* @database: (nullable): a #GTlsDatabase
*
* Sets the certificate database that is used to verify peer certificates.
* This is set to the default database by default. See
* g_tls_backend_get_default_database(). If set to %NULL, then
* peer certificate validation will always set the
* %G_TLS_CERTIFICATE_UNKNOWN_CA error (meaning
* #GTlsConnection::accept-certificate will always be emitted on
* client-side connections, unless that bit is not set in
* #GTlsClientConnection:validation-flags).
*
* Since: 2.30
*/
void
g_tls_connection_set_database (GTlsConnection *conn,
GTlsDatabase *database)
{
g_return_if_fail (G_IS_TLS_CONNECTION (conn));
g_return_if_fail (database == NULL || G_IS_TLS_DATABASE (database));
g_object_set (G_OBJECT (conn),
"database", database,
NULL);
}
/**
* g_tls_connection_get_database:
* @conn: a #GTlsConnection
*
* Gets the certificate database that @conn uses to verify
* peer certificates. See g_tls_connection_set_database().
*
* Returns: (transfer none) (nullable): the certificate database that @conn uses or %NULL
*
* Since: 2.30
*/
GTlsDatabase*
g_tls_connection_get_database (GTlsConnection *conn)
{
GTlsDatabase *database = NULL;
g_return_val_if_fail (G_IS_TLS_CONNECTION (conn), NULL);
g_object_get (G_OBJECT (conn),
"database", &database,
NULL);
if (database)
g_object_unref (database);
return database;
}
/**
* g_tls_connection_set_certificate:
* @conn: a #GTlsConnection
* @certificate: the certificate to use for @conn
*
* This sets the certificate that @conn will present to its peer
* during the TLS handshake. For a #GTlsServerConnection, it is
* mandatory to set this, and that will normally be done at construct
* time.
*
* For a #GTlsClientConnection, this is optional. If a handshake fails
* with %G_TLS_ERROR_CERTIFICATE_REQUIRED, that means that the server
* requires a certificate, and if you try connecting again, you should
* call this method first. You can call
* g_tls_client_connection_get_accepted_cas() on the failed connection
* to get a list of Certificate Authorities that the server will
* accept certificates from.
*
* (It is also possible that a server will allow the connection with
* or without a certificate; in that case, if you don't provide a
* certificate, you can tell that the server requested one by the fact
* that g_tls_client_connection_get_accepted_cas() will return
* non-%NULL.)
*
* Since: 2.28
*/
void
g_tls_connection_set_certificate (GTlsConnection *conn,
GTlsCertificate *certificate)
{
g_return_if_fail (G_IS_TLS_CONNECTION (conn));
g_return_if_fail (G_IS_TLS_CERTIFICATE (certificate));
g_object_set (G_OBJECT (conn), "certificate", certificate, NULL);
}
/**
* g_tls_connection_get_certificate:
* @conn: a #GTlsConnection
*
* Gets @conn's certificate, as set by
* g_tls_connection_set_certificate().
*
* Returns: (transfer none) (nullable): @conn's certificate, or %NULL
*
* Since: 2.28
*/
GTlsCertificate *
g_tls_connection_get_certificate (GTlsConnection *conn)
{
GTlsCertificate *certificate;
g_return_val_if_fail (G_IS_TLS_CONNECTION (conn), NULL);
g_object_get (G_OBJECT (conn), "certificate", &certificate, NULL);
if (certificate)
g_object_unref (certificate);
return certificate;
}
/**
* g_tls_connection_set_interaction:
* @conn: a connection
* @interaction: (nullable): an interaction object, or %NULL
*
* Set the object that will be used to interact with the user. It will be used
* for things like prompting the user for passwords.
*
* The @interaction argument will normally be a derived subclass of
* #GTlsInteraction. %NULL can also be provided if no user interaction
* should occur for this connection.
*
* Since: 2.30
*/
void
g_tls_connection_set_interaction (GTlsConnection *conn,
GTlsInteraction *interaction)
{
g_return_if_fail (G_IS_TLS_CONNECTION (conn));
g_return_if_fail (interaction == NULL || G_IS_TLS_INTERACTION (interaction));
g_object_set (G_OBJECT (conn), "interaction", interaction, NULL);
}
/**
* g_tls_connection_get_interaction:
* @conn: a connection
*
* Get the object that will be used to interact with the user. It will be used
* for things like prompting the user for passwords. If %NULL is returned, then
* no user interaction will occur for this connection.
*
* Returns: (transfer none) (nullable): The interaction object.
*
* Since: 2.30
*/
GTlsInteraction *
g_tls_connection_get_interaction (GTlsConnection *conn)
{
GTlsInteraction *interaction = NULL;
g_return_val_if_fail (G_IS_TLS_CONNECTION (conn), NULL);
g_object_get (G_OBJECT (conn), "interaction", &interaction, NULL);
if (interaction)
g_object_unref (interaction);
return interaction;
}
/**
* g_tls_connection_get_peer_certificate:
* @conn: a #GTlsConnection
*
* Gets @conn's peer's certificate after the handshake has completed
* or failed. (It is not set during the emission of
* #GTlsConnection::accept-certificate.)
*
* Returns: (transfer none) (nullable): @conn's peer's certificate, or %NULL
*
* Since: 2.28
*/
GTlsCertificate *
g_tls_connection_get_peer_certificate (GTlsConnection *conn)
{
GTlsCertificate *peer_certificate;
g_return_val_if_fail (G_IS_TLS_CONNECTION (conn), NULL);
g_object_get (G_OBJECT (conn), "peer-certificate", &peer_certificate, NULL);
if (peer_certificate)
g_object_unref (peer_certificate);
return peer_certificate;
}
/**
* g_tls_connection_get_peer_certificate_errors:
* @conn: a #GTlsConnection
*
* Gets the errors associated with validating @conn's peer's
* certificate, after the handshake has completed or failed. (It is
* not set during the emission of #GTlsConnection::accept-certificate.)
*
* Returns: @conn's peer's certificate errors
*
* Since: 2.28
*/
GTlsCertificateFlags
g_tls_connection_get_peer_certificate_errors (GTlsConnection *conn)
{
GTlsCertificateFlags errors;
g_return_val_if_fail (G_IS_TLS_CONNECTION (conn), 0);
g_object_get (G_OBJECT (conn), "peer-certificate-errors", &errors, NULL);
return errors;
}
/**
* g_tls_connection_set_require_close_notify:
* @conn: a #GTlsConnection
* @require_close_notify: whether or not to require close notification
*
* Sets whether or not @conn expects a proper TLS close notification
* before the connection is closed. If this is %TRUE (the default),
* then @conn will expect to receive a TLS close notification from its
* peer before the connection is closed, and will return a
* %G_TLS_ERROR_EOF error if the connection is closed without proper
* notification (since this may indicate a network error, or
* man-in-the-middle attack).
*
* In some protocols, the application will know whether or not the
* connection was closed cleanly based on application-level data
* (because the application-level data includes a length field, or is
* somehow self-delimiting); in this case, the close notify is
* redundant and sometimes omitted. (TLS 1.1 explicitly allows this;
* in TLS 1.0 it is technically an error, but often done anyway.) You
* can use g_tls_connection_set_require_close_notify() to tell @conn
* to allow an "unannounced" connection close, in which case the close
* will show up as a 0-length read, as in a non-TLS
* #GSocketConnection, and it is up to the application to check that
* the data has been fully received.
*
* Note that this only affects the behavior when the peer closes the
* connection; when the application calls g_io_stream_close() itself
* on @conn, this will send a close notification regardless of the
* setting of this property. If you explicitly want to do an unclean
* close, you can close @conn's #GTlsConnection:base-io-stream rather
* than closing @conn itself, but note that this may only be done when no other
* operations are pending on @conn or the base I/O stream.
*
* Since: 2.28
*/
void
g_tls_connection_set_require_close_notify (GTlsConnection *conn,
gboolean require_close_notify)
{
g_return_if_fail (G_IS_TLS_CONNECTION (conn));
g_object_set (G_OBJECT (conn),
"require-close-notify", require_close_notify,
NULL);
}
/**
* g_tls_connection_get_require_close_notify:
* @conn: a #GTlsConnection
*
* Tests whether or not @conn expects a proper TLS close notification
* when the connection is closed. See
* g_tls_connection_set_require_close_notify() for details.
*
* Returns: %TRUE if @conn requires a proper TLS close
* notification.
*
* Since: 2.28
*/
gboolean
g_tls_connection_get_require_close_notify (GTlsConnection *conn)
{
gboolean require_close_notify;
g_return_val_if_fail (G_IS_TLS_CONNECTION (conn), TRUE);
g_object_get (G_OBJECT (conn),
"require-close-notify", &require_close_notify,
NULL);
return require_close_notify;
}
/**
* g_tls_connection_set_rehandshake_mode:
* @conn: a #GTlsConnection
* @mode: the rehandshaking mode
*
* Since GLib 2.64, changing the rehandshake mode is no longer supported
* and will have no effect. With TLS 1.3, rehandshaking has been removed from
* the TLS protocol, replaced by separate post-handshake authentication and
* rekey operations.
*
* Since: 2.28
*
* Deprecated: 2.60. Changing the rehandshake mode is no longer
* required for compatibility. Also, rehandshaking has been removed
* from the TLS protocol in TLS 1.3.
*/
G_GNUC_BEGIN_IGNORE_DEPRECATIONS
void
g_tls_connection_set_rehandshake_mode (GTlsConnection *conn,
GTlsRehandshakeMode mode)
{
g_return_if_fail (G_IS_TLS_CONNECTION (conn));
g_object_set (G_OBJECT (conn),
"rehandshake-mode", G_TLS_REHANDSHAKE_SAFELY,
NULL);
}
G_GNUC_END_IGNORE_DEPRECATIONS
/**
* g_tls_connection_get_rehandshake_mode:
* @conn: a #GTlsConnection
*
* Gets @conn rehandshaking mode. See
* g_tls_connection_set_rehandshake_mode() for details.
*
* Returns: %G_TLS_REHANDSHAKE_SAFELY
*
* Since: 2.28
*
* Deprecated: 2.60. Changing the rehandshake mode is no longer
* required for compatibility. Also, rehandshaking has been removed
* from the TLS protocol in TLS 1.3.
*/
G_GNUC_BEGIN_IGNORE_DEPRECATIONS
GTlsRehandshakeMode
g_tls_connection_get_rehandshake_mode (GTlsConnection *conn)
{
GTlsRehandshakeMode mode;
g_return_val_if_fail (G_IS_TLS_CONNECTION (conn), G_TLS_REHANDSHAKE_SAFELY);
/* Continue to call g_object_get(), even though the return value is
* ignored, so that behavior doesn’t change for derived classes.
*/
g_object_get (G_OBJECT (conn),
"rehandshake-mode", &mode,
NULL);
return G_TLS_REHANDSHAKE_SAFELY;
}
G_GNUC_END_IGNORE_DEPRECATIONS
/**
* g_tls_connection_set_advertised_protocols:
* @conn: a #GTlsConnection
* @protocols: (array zero-terminated=1) (nullable): a %NULL-terminated
* array of ALPN protocol names (eg, "http/1.1", "h2"), or %NULL
*
* Sets the list of application-layer protocols to advertise that the
* caller is willing to speak on this connection. The
* Application-Layer Protocol Negotiation (ALPN) extension will be
* used to negotiate a compatible protocol with the peer; use
* g_tls_connection_get_negotiated_protocol() to find the negotiated
* protocol after the handshake. Specifying %NULL for the the value
* of @protocols will disable ALPN negotiation.
*
* See [IANA TLS ALPN Protocol IDs](https://www.iana.org/assignments/tls-extensiontype-values/tls-extensiontype-values.xhtml#alpn-protocol-ids)
* for a list of registered protocol IDs.
*
* Since: 2.60
*/
void
g_tls_connection_set_advertised_protocols (GTlsConnection *conn,
const gchar * const *protocols)
{
g_return_if_fail (G_IS_TLS_CONNECTION (conn));
g_object_set (G_OBJECT (conn),
"advertised-protocols", protocols,
NULL);
}
/**
* g_tls_connection_get_negotiated_protocol:
* @conn: a #GTlsConnection
*
* Gets the name of the application-layer protocol negotiated during
* the handshake.
*
* If the peer did not use the ALPN extension, or did not advertise a
* protocol that matched one of @conn's protocols, or the TLS backend
* does not support ALPN, then this will be %NULL. See
* g_tls_connection_set_advertised_protocols().
*
* Returns: (nullable): the negotiated protocol, or %NULL
*
* Since: 2.60
*/
const gchar *
g_tls_connection_get_negotiated_protocol (GTlsConnection *conn)
{
GTlsConnectionClass *class;
g_return_val_if_fail (G_IS_TLS_CONNECTION (conn), NULL);
class = G_TLS_CONNECTION_GET_CLASS (conn);
if (class->get_negotiated_protocol == NULL)
return NULL;
return class->get_negotiated_protocol (conn);
}
/**
* g_tls_channel_binding_error_quark:
*
* Gets the TLS channel binding error quark.
*
* Returns: a #GQuark.
*
* Since: 2.66
*/
G_DEFINE_QUARK (g-tls-channel-binding-error-quark, g_tls_channel_binding_error)
/**
* g_tls_connection_get_channel_binding_data:
* @conn: a #GTlsConnection
* @type: #GTlsChannelBindingType type of data to fetch
* @data: (out callee-allocates)(optional)(transfer none): #GByteArray is
* filled with the binding data, or %NULL
* @error: a #GError pointer, or %NULL
*
* Query the TLS backend for TLS channel binding data of @type for @conn.
*
* This call retrieves TLS channel binding data as specified in RFC
* [5056](https://tools.ietf.org/html/rfc5056), RFC
* [5929](https://tools.ietf.org/html/rfc5929), and related RFCs. The
* binding data is returned in @data. The @data is resized by the callee
* using #GByteArray buffer management and will be freed when the @data
* is destroyed by g_byte_array_unref(). If @data is %NULL, it will only
* check whether TLS backend is able to fetch the data (e.g. whether @type
* is supported by the TLS backend). It does not guarantee that the data
* will be available though. That could happen if TLS connection does not
* support @type or the binding data is not available yet due to additional
* negotiation or input required.
*
* Returns: %TRUE on success, %FALSE otherwise
*
* Since: 2.66
*/
gboolean
g_tls_connection_get_channel_binding_data (GTlsConnection *conn,
GTlsChannelBindingType type,
GByteArray *data,
GError **error)
{
GTlsConnectionClass *class;
g_return_val_if_fail (G_IS_TLS_CONNECTION (conn), FALSE);
g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
class = G_TLS_CONNECTION_GET_CLASS (conn);
if (class->get_binding_data == NULL)
{
g_set_error_literal (error, G_TLS_CHANNEL_BINDING_ERROR,
G_TLS_CHANNEL_BINDING_ERROR_NOT_IMPLEMENTED,
_("TLS backend does not implement TLS binding retrieval"));
return FALSE;
}
return class->get_binding_data (conn, type, data, error);
}
/**
* g_tls_connection_handshake:
* @conn: a #GTlsConnection
* @cancellable: (nullable): a #GCancellable, or %NULL
* @error: a #GError, or %NULL
*
* Attempts a TLS handshake on @conn.
*
* On the client side, it is never necessary to call this method;
* although the connection needs to perform a handshake after
* connecting (or after sending a "STARTTLS"-type command),
* #GTlsConnection will handle this for you automatically when you try
* to send or receive data on the connection. You can call
* g_tls_connection_handshake() manually if you want to know whether
* the initial handshake succeeded or failed (as opposed to just
* immediately trying to use @conn to read or write, in which case,
* if it fails, it may not be possible to tell if it failed before or
* after completing the handshake), but beware that servers may reject
* client authentication after the handshake has completed, so a
* successful handshake does not indicate the connection will be usable.
*
* Likewise, on the server side, although a handshake is necessary at
* the beginning of the communication, you do not need to call this
* function explicitly unless you want clearer error reporting.
*
* Previously, calling g_tls_connection_handshake() after the initial
* handshake would trigger a rehandshake; however, this usage was
* deprecated in GLib 2.60 because rehandshaking was removed from the
* TLS protocol in TLS 1.3. Since GLib 2.64, calling this function after
* the initial handshake will no longer do anything.
*
* When using a #GTlsConnection created by #GSocketClient, the
* #GSocketClient performs the initial handshake, so calling this
* function manually is not recommended.
*
* #GTlsConnection::accept_certificate may be emitted during the
* handshake.
*
* Returns: success or failure
*
* Since: 2.28
*/
gboolean
g_tls_connection_handshake (GTlsConnection *conn,
GCancellable *cancellable,
GError **error)
{
g_return_val_if_fail (G_IS_TLS_CONNECTION (conn), FALSE);
return G_TLS_CONNECTION_GET_CLASS (conn)->handshake (conn, cancellable, error);
}
/**
* g_tls_connection_handshake_async:
* @conn: a #GTlsConnection
* @io_priority: the [I/O priority][io-priority] of the request
* @cancellable: (nullable): a #GCancellable, or %NULL
* @callback: callback to call when the handshake is complete
* @user_data: the data to pass to the callback function
*
* Asynchronously performs a TLS handshake on @conn. See
* g_tls_connection_handshake() for more information.
*
* Since: 2.28
*/
void
g_tls_connection_handshake_async (GTlsConnection *conn,
int io_priority,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
g_return_if_fail (G_IS_TLS_CONNECTION (conn));
G_TLS_CONNECTION_GET_CLASS (conn)->handshake_async (conn, io_priority,
cancellable,
callback, user_data);
}
/**
* g_tls_connection_handshake_finish:
* @conn: a #GTlsConnection
* @result: a #GAsyncResult.
* @error: a #GError pointer, or %NULL
*
* Finish an asynchronous TLS handshake operation. See
* g_tls_connection_handshake() for more information.
*
* Returns: %TRUE on success, %FALSE on failure, in which
* case @error will be set.
*
* Since: 2.28
*/
gboolean
g_tls_connection_handshake_finish (GTlsConnection *conn,
GAsyncResult *result,
GError **error)
{
g_return_val_if_fail (G_IS_TLS_CONNECTION (conn), FALSE);
return G_TLS_CONNECTION_GET_CLASS (conn)->handshake_finish (conn, result, error);
}
/**
* g_tls_connection_get_protocol_version:
* @conn: a #GTlsConnection
*
* Returns the current TLS protocol version, which may be
* %G_TLS_PROTOCOL_VERSION_UNKNOWN if the connection has not handshaked, or
* has been closed, or if the TLS backend has implemented a protocol version
* that is not a recognized #GTlsProtocolVersion.
*
* Returns: The current TLS protocol version
*
* Since: 2.70
*/
GTlsProtocolVersion
g_tls_connection_get_protocol_version (GTlsConnection *conn)
{
GTlsProtocolVersion protocol_version;
GEnumClass *enum_class;
GEnumValue *enum_value;
g_return_val_if_fail (G_IS_TLS_CONNECTION (conn), G_TLS_PROTOCOL_VERSION_UNKNOWN);
g_object_get (G_OBJECT (conn),
"protocol-version", &protocol_version,
NULL);
/* Convert unknown values to G_TLS_PROTOCOL_VERSION_UNKNOWN. */
enum_class = g_type_class_peek_static (G_TYPE_TLS_PROTOCOL_VERSION);
enum_value = g_enum_get_value (enum_class, protocol_version);
return enum_value ? protocol_version : G_TLS_PROTOCOL_VERSION_UNKNOWN;
}
/**
* g_tls_connection_get_ciphersuite_name:
* @conn: a #GTlsConnection
*
* Returns the name of the current TLS ciphersuite, or %NULL if the
* connection has not handshaked or has been closed. Beware that the TLS
* backend may use any of multiple different naming conventions, because
* OpenSSL and GnuTLS have their own ciphersuite naming conventions that
* are different from each other and different from the standard, IANA-
* registered ciphersuite names. The ciphersuite name is intended to be
* displayed to the user for informative purposes only, and parsing it
* is not recommended.
*
* Returns: (nullable): The name of the current TLS ciphersuite, or %NULL
*
* Since: 2.70
*/
gchar *
g_tls_connection_get_ciphersuite_name (GTlsConnection *conn)
{
gchar *ciphersuite_name;
g_return_val_if_fail (G_IS_TLS_CONNECTION (conn), NULL);
g_object_get (G_OBJECT (conn),
"ciphersuite-name", &ciphersuite_name,
NULL);
return g_steal_pointer (&ciphersuite_name);
}
/**
* g_tls_error_quark:
*
* Gets the TLS error quark.
*
* Returns: a #GQuark.
*
* Since: 2.28
*/
G_DEFINE_QUARK (g-tls-error-quark, g_tls_error)
/**
* g_tls_connection_emit_accept_certificate:
* @conn: a #GTlsConnection
* @peer_cert: the peer's #GTlsCertificate
* @errors: the problems with @peer_cert
*
* Used by #GTlsConnection implementations to emit the
* #GTlsConnection::accept-certificate signal.
*
* Returns: %TRUE if one of the signal handlers has returned
* %TRUE to accept @peer_cert
*
* Since: 2.28
*/
gboolean
g_tls_connection_emit_accept_certificate (GTlsConnection *conn,
GTlsCertificate *peer_cert,
GTlsCertificateFlags errors)
{
gboolean accept = FALSE;
g_signal_emit (conn, signals[ACCEPT_CERTIFICATE], 0,
peer_cert, errors, &accept);
return accept;
}
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