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407b86afb8
Validation fails if ANY of the flags are set. Not if they're ALL set. This is obvious and no programmer would be confused, but let's fix it anyway.
396 lines
13 KiB
C
396 lines
13 KiB
C
/* GIO - GLib Input, Output and Streaming Library
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*
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* Copyright © 2010 Red Hat, Inc
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General
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* Public License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "config.h"
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#include "glib.h"
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#include "gtlsclientconnection.h"
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#include "ginitable.h"
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#include "gioenumtypes.h"
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#include "gsocket.h"
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#include "gsocketconnectable.h"
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#include "gtlsbackend.h"
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#include "gtlscertificate.h"
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#include "glibintl.h"
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/**
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* SECTION:gtlsclientconnection
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* @short_description: TLS client-side connection
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* @include: gio/gio.h
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*
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* #GTlsClientConnection is the client-side subclass of
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* #GTlsConnection, representing a client-side TLS connection.
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*/
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/**
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* GTlsClientConnection:
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*
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* Abstract base class for the backend-specific client connection
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* type.
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*
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* Since: 2.28
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*/
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G_DEFINE_INTERFACE (GTlsClientConnection, g_tls_client_connection, G_TYPE_TLS_CONNECTION)
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static void
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g_tls_client_connection_default_init (GTlsClientConnectionInterface *iface)
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{
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/**
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* GTlsClientConnection:validation-flags:
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*
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* What steps to perform when validating a certificate received from
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* a server. Server certificates that fail to validate in any of the
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* ways indicated here will be rejected unless the application
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* overrides the default via #GTlsConnection::accept-certificate.
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*
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* Since: 2.28
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*/
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g_object_interface_install_property (iface,
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g_param_spec_flags ("validation-flags",
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P_("Validation flags"),
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P_("What certificate validation to perform"),
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G_TYPE_TLS_CERTIFICATE_FLAGS,
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G_TLS_CERTIFICATE_VALIDATE_ALL,
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G_PARAM_READWRITE |
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G_PARAM_CONSTRUCT |
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G_PARAM_STATIC_STRINGS));
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/**
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* GTlsClientConnection:server-identity:
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*
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* A #GSocketConnectable describing the identity of the server that
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* is expected on the other end of the connection.
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*
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* If the %G_TLS_CERTIFICATE_BAD_IDENTITY flag is set in
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* #GTlsClientConnection:validation-flags, this object will be used
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* to determine the expected identify of the remote end of the
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* connection; if #GTlsClientConnection:server-identity is not set,
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* or does not match the identity presented by the server, then the
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* %G_TLS_CERTIFICATE_BAD_IDENTITY validation will fail.
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*
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* In addition to its use in verifying the server certificate,
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* this is also used to give a hint to the server about what
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* certificate we expect, which is useful for servers that serve
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* virtual hosts.
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*
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* Since: 2.28
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*/
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g_object_interface_install_property (iface,
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g_param_spec_object ("server-identity",
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P_("Server identity"),
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P_("GSocketConnectable identifying the server"),
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G_TYPE_SOCKET_CONNECTABLE,
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G_PARAM_READWRITE |
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G_PARAM_CONSTRUCT |
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G_PARAM_STATIC_STRINGS));
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/**
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* GTlsClientConnection:use-ssl3:
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*
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* SSL 3.0 is no longer supported. See
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* g_tls_client_connection_set_use_ssl3() for details.
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*
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* Since: 2.28
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*
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* Deprecated: 2.56: SSL 3.0 is insecure.
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*/
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g_object_interface_install_property (iface,
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g_param_spec_boolean ("use-ssl3",
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P_("Use fallback"),
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P_("Use fallback version of SSL/TLS rather than most recent version"),
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FALSE,
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G_PARAM_READWRITE |
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G_PARAM_CONSTRUCT |
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G_PARAM_STATIC_STRINGS |
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G_PARAM_DEPRECATED));
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/**
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* GTlsClientConnection:accepted-cas: (type GLib.List) (element-type GLib.ByteArray)
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*
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* A list of the distinguished names of the Certificate Authorities
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* that the server will accept client certificates signed by. If the
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* server requests a client certificate during the handshake, then
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* this property will be set after the handshake completes.
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*
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* Each item in the list is a #GByteArray which contains the complete
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* subject DN of the certificate authority.
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*
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* Since: 2.28
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*/
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g_object_interface_install_property (iface,
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g_param_spec_pointer ("accepted-cas",
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P_("Accepted CAs"),
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P_("Distinguished names of the CAs the server accepts certificates from"),
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G_PARAM_READABLE |
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G_PARAM_STATIC_STRINGS));
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}
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/**
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* g_tls_client_connection_new:
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* @base_io_stream: the #GIOStream to wrap
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* @server_identity: (nullable): the expected identity of the server
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* @error: #GError for error reporting, or %NULL to ignore.
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*
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* Creates a new #GTlsClientConnection wrapping @base_io_stream (which
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* must have pollable input and output streams) which is assumed to
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* communicate with the server identified by @server_identity.
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*
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* See the documentation for #GTlsConnection:base-io-stream for restrictions
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* on when application code can run operations on the @base_io_stream after
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* this function has returned.
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*
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* Returns: (transfer full) (type GTlsClientConnection): the new
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* #GTlsClientConnection, or %NULL on error
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*
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* Since: 2.28
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*/
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GIOStream *
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g_tls_client_connection_new (GIOStream *base_io_stream,
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GSocketConnectable *server_identity,
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GError **error)
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{
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GObject *conn;
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GTlsBackend *backend;
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backend = g_tls_backend_get_default ();
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conn = g_initable_new (g_tls_backend_get_client_connection_type (backend),
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NULL, error,
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"base-io-stream", base_io_stream,
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"server-identity", server_identity,
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NULL);
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return G_IO_STREAM (conn);
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}
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/**
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* g_tls_client_connection_get_validation_flags:
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* @conn: the #GTlsClientConnection
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*
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* Gets @conn's validation flags
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*
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* Returns: the validation flags
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*
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* Since: 2.28
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*/
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GTlsCertificateFlags
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g_tls_client_connection_get_validation_flags (GTlsClientConnection *conn)
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{
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GTlsCertificateFlags flags = 0;
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g_return_val_if_fail (G_IS_TLS_CLIENT_CONNECTION (conn), 0);
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g_object_get (G_OBJECT (conn), "validation-flags", &flags, NULL);
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return flags;
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}
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/**
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* g_tls_client_connection_set_validation_flags:
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* @conn: the #GTlsClientConnection
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* @flags: the #GTlsCertificateFlags to use
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*
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* Sets @conn's validation flags, to override the default set of
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* checks performed when validating a server certificate. By default,
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* %G_TLS_CERTIFICATE_VALIDATE_ALL is used.
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*
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* Since: 2.28
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*/
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void
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g_tls_client_connection_set_validation_flags (GTlsClientConnection *conn,
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GTlsCertificateFlags flags)
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{
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g_return_if_fail (G_IS_TLS_CLIENT_CONNECTION (conn));
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g_object_set (G_OBJECT (conn), "validation-flags", flags, NULL);
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}
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/**
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* g_tls_client_connection_get_server_identity:
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* @conn: the #GTlsClientConnection
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*
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* Gets @conn's expected server identity
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*
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* Returns: (transfer none): a #GSocketConnectable describing the
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* expected server identity, or %NULL if the expected identity is not
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* known.
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*
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* Since: 2.28
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*/
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GSocketConnectable *
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g_tls_client_connection_get_server_identity (GTlsClientConnection *conn)
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{
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GSocketConnectable *identity = NULL;
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g_return_val_if_fail (G_IS_TLS_CLIENT_CONNECTION (conn), 0);
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g_object_get (G_OBJECT (conn), "server-identity", &identity, NULL);
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if (identity)
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g_object_unref (identity);
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return identity;
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}
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/**
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* g_tls_client_connection_set_server_identity:
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* @conn: the #GTlsClientConnection
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* @identity: a #GSocketConnectable describing the expected server identity
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*
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* Sets @conn's expected server identity, which is used both to tell
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* servers on virtual hosts which certificate to present, and also
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* to let @conn know what name to look for in the certificate when
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* performing %G_TLS_CERTIFICATE_BAD_IDENTITY validation, if enabled.
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*
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* Since: 2.28
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*/
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void
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g_tls_client_connection_set_server_identity (GTlsClientConnection *conn,
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GSocketConnectable *identity)
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{
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g_return_if_fail (G_IS_TLS_CLIENT_CONNECTION (conn));
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g_object_set (G_OBJECT (conn), "server-identity", identity, NULL);
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}
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/**
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* g_tls_client_connection_get_use_ssl3:
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* @conn: the #GTlsClientConnection
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*
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* SSL 3.0 is no longer supported. See
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* g_tls_client_connection_set_use_ssl3() for details.
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*
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* Returns: %FALSE
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*
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* Since: 2.28
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*
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* Deprecated: 2.56: SSL 3.0 is insecure.
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*/
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gboolean
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g_tls_client_connection_get_use_ssl3 (GTlsClientConnection *conn)
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{
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gboolean use_ssl3 = FALSE;
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g_return_val_if_fail (G_IS_TLS_CLIENT_CONNECTION (conn), 0);
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g_object_get (G_OBJECT (conn), "use-ssl3", &use_ssl3, NULL);
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return FALSE;
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}
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/**
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* g_tls_client_connection_set_use_ssl3:
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* @conn: the #GTlsClientConnection
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* @use_ssl3: a #gboolean, ignored
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*
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* Since GLib 2.42.1, SSL 3.0 is no longer supported.
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*
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* From GLib 2.42.1 through GLib 2.62, this function could be used to
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* force use of TLS 1.0, the lowest-supported TLS protocol version at
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* the time. In the past, this was needed to connect to broken TLS
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* servers that exhibited protocol version intolerance. Such servers
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* are no longer common, and using TLS 1.0 is no longer considered
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* acceptable.
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*
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* Since GLib 2.64, this function does nothing.
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*
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* Since: 2.28
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*
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* Deprecated: 2.56: SSL 3.0 is insecure.
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*/
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void
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g_tls_client_connection_set_use_ssl3 (GTlsClientConnection *conn,
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gboolean use_ssl3)
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{
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g_return_if_fail (G_IS_TLS_CLIENT_CONNECTION (conn));
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g_object_set (G_OBJECT (conn), "use-ssl3", FALSE, NULL);
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}
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/**
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* g_tls_client_connection_get_accepted_cas:
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* @conn: the #GTlsClientConnection
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*
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* Gets the list of distinguished names of the Certificate Authorities
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* that the server will accept certificates from. This will be set
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* during the TLS handshake if the server requests a certificate.
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* Otherwise, it will be %NULL.
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*
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* Each item in the list is a #GByteArray which contains the complete
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* subject DN of the certificate authority.
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*
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* Returns: (element-type GByteArray) (transfer full): the list of
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* CA DNs. You should unref each element with g_byte_array_unref() and then
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* the free the list with g_list_free().
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*
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* Since: 2.28
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*/
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GList *
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g_tls_client_connection_get_accepted_cas (GTlsClientConnection *conn)
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{
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GList *accepted_cas = NULL;
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g_return_val_if_fail (G_IS_TLS_CLIENT_CONNECTION (conn), NULL);
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g_object_get (G_OBJECT (conn), "accepted-cas", &accepted_cas, NULL);
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return accepted_cas;
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}
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/**
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* g_tls_client_connection_copy_session_state:
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* @conn: a #GTlsClientConnection
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* @source: a #GTlsClientConnection
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*
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* Possibly copies session state from one connection to another, for use
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* in TLS session resumption. This is not normally needed, but may be
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* used when the same session needs to be used between different
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* endpoints, as is required by some protocols, such as FTP over TLS.
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* @source should have already completed a handshake and, since TLS 1.3,
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* it should have been used to read data at least once. @conn should not
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* have completed a handshake.
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*
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* It is not possible to know whether a call to this function will
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* actually do anything. Because session resumption is normally used
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* only for performance benefit, the TLS backend might not implement
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* this function. Even if implemented, it may not actually succeed in
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* allowing @conn to resume @source's TLS session, because the server
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* may not have sent a session resumption token to @source, or it may
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* refuse to accept the token from @conn. There is no way to know
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* whether a call to this function is actually successful.
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*
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* Using this function is not required to benefit from session
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* resumption. If the TLS backend supports session resumption, the
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* session will be resumed automatically if it is possible to do so
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* without weakening the privacy guarantees normally provided by TLS,
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* without need to call this function. For example, with TLS 1.3,
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* a session ticket will be automatically copied from any
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* #GTlsClientConnection that has previously received session tickets
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* from the server, provided a ticket is available that has not
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* previously been used for session resumption, since session ticket
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* reuse would be a privacy weakness. Using this function causes the
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* ticket to be copied without regard for privacy considerations.
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*
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* Since: 2.46
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*/
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void
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g_tls_client_connection_copy_session_state (GTlsClientConnection *conn,
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GTlsClientConnection *source)
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{
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g_return_if_fail (G_IS_TLS_CLIENT_CONNECTION (conn));
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g_return_if_fail (G_IS_TLS_CLIENT_CONNECTION (source));
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g_return_if_fail (G_TLS_CLIENT_CONNECTION_GET_INTERFACE (conn)->copy_session_state != NULL);
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G_TLS_CLIENT_CONNECTION_GET_INTERFACE (conn)->copy_session_state (conn,
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source);
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}
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