/* 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 . */ #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 */ struct _GTlsConnectionPrivate { gchar *negotiated_protocol; }; G_DEFINE_ABSTRACT_TYPE_WITH_PRIVATE (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); static void g_tls_connection_finalize (GObject *object); 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, }; 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; gobject_class->finalize = g_tls_connection_finalize; /** * 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: * * 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: * * 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: * * The connection's peer's certificate, after the TLS handshake has * completed and the certificate has been accepted. 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-and-ignored 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: * * 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::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); } static void g_tls_connection_finalize (GObject *object) { GTlsConnection *conn = G_TLS_CONNECTION(object); GTlsConnectionPrivate *priv = g_tls_connection_get_instance_private (conn); g_clear_pointer (&priv->negotiated_protocol, g_free); G_OBJECT_CLASS (g_tls_connection_parent_class)->finalize (object); } /** * 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: 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): 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): @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): 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. * (It is not set during the emission of * #GTlsConnection::accept-certificate.) * * Returns: (transfer none): @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. (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 1.2, the connection will allow a rehandshake only if the * other end of the connection supports the TLS `renegotiation_info` * extension. This means that rehandshaking will not work against older * implementations that do not support that extension. * * 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); 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) { GTlsConnectionPrivate *priv; gchar *protocol; g_return_val_if_fail (G_IS_TLS_CONNECTION (conn), NULL); g_object_get (G_OBJECT (conn), "negotiated-protocol", &protocol, NULL); /* * Cache the property internally so we can return a `const` pointer * to the caller. */ priv = g_tls_connection_get_instance_private (conn); if (g_strcmp0 (priv->negotiated_protocol, protocol) != 0) { g_free (priv->negotiated_protocol); priv->negotiated_protocol = protocol; } else { g_free (protocol); } return priv->negotiated_protocol; } /** * 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. * * If TLS 1.2 or older is in use, you may call * g_tls_connection_handshake() after the initial handshake to * rehandshake; however, this usage is deprecated because rehandshaking * is no longer part of the TLS protocol in TLS 1.3. Accordingly, the * behavior of calling this function after the initial handshake is now * undefined, except it is guaranteed to be reasonable and * nondestructive so as to preserve compatibility with code written for * older versions of GLib. * * 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_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; }