| /* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */ |
| /* dbus-syntax.c - utility functions for strings with special syntax |
| * |
| * Author: Simon McVittie <simon.mcvittie@collabora.co.uk> |
| * Copyright © 2011 Nokia Corporation |
| * |
| * Licensed under the Academic Free License version 2.1 |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program 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 General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| * |
| */ |
| |
| #include <config.h> |
| #include "dbus-syntax.h" |
| |
| #include "dbus-internals.h" |
| #include "dbus-marshal-validate.h" |
| #include "dbus-shared.h" |
| |
| /** |
| * @defgroup DBusSyntax Utility functions for strings with special syntax |
| * @ingroup DBus |
| * @brief Parsing D-Bus type signatures |
| * @{ |
| */ |
| |
| /** |
| * Check an object path for validity. Remember that #NULL can always |
| * be passed instead of a DBusError *, if you don't care about having |
| * an error name and message. |
| * |
| * This function is suitable for validating C strings, but is not suitable |
| * for validating untrusted data from a network unless the string's length |
| * is also checked, since it assumes that the string ends at the first zero |
| * byte according to normal C conventions. |
| * |
| * @param path a potentially invalid object path, which must not be #NULL |
| * @param error error return |
| * @returns #TRUE if path is valid |
| */ |
| dbus_bool_t |
| dbus_validate_path (const char *path, |
| DBusError *error) |
| { |
| DBusString str; |
| int len; |
| |
| _dbus_return_val_if_fail (path != NULL, FALSE); |
| |
| _dbus_string_init_const (&str, path); |
| len = _dbus_string_get_length (&str); |
| |
| /* In general, it ought to be valid... */ |
| if (_DBUS_LIKELY (_dbus_validate_path (&str, 0, len))) |
| return TRUE; |
| |
| /* slow path: string is invalid, find out why */ |
| |
| if (!_dbus_string_validate_utf8 (&str, 0, len)) |
| { |
| /* don't quote the actual string here, since a DBusError also needs to |
| * be valid UTF-8 */ |
| dbus_set_error (error, DBUS_ERROR_INVALID_ARGS, |
| "Object path was not valid UTF-8"); |
| return FALSE; |
| } |
| |
| /* FIXME: later, diagnose exactly how it was invalid */ |
| dbus_set_error (error, DBUS_ERROR_INVALID_ARGS, |
| "Object path was not valid: '%s'", path); |
| return FALSE; |
| } |
| |
| /** |
| * Check an interface name for validity. Remember that #NULL can always |
| * be passed instead of a DBusError *, if you don't care about having |
| * an error name and message. |
| * |
| * This function is suitable for validating C strings, but is not suitable |
| * for validating untrusted data from a network unless the string's length |
| * is also checked, since it assumes that the string ends at the first zero |
| * byte according to normal C conventions. |
| * |
| * @param path a potentially invalid interface name, which must not be #NULL |
| * @param error error return |
| * @returns #TRUE if name is valid |
| */ |
| dbus_bool_t |
| dbus_validate_interface (const char *name, |
| DBusError *error) |
| { |
| DBusString str; |
| int len; |
| |
| _dbus_return_val_if_fail (name != NULL, FALSE); |
| |
| _dbus_string_init_const (&str, name); |
| len = _dbus_string_get_length (&str); |
| |
| /* In general, it ought to be valid... */ |
| if (_DBUS_LIKELY (_dbus_validate_interface (&str, 0, len))) |
| return TRUE; |
| |
| /* slow path: string is invalid, find out why */ |
| |
| if (!_dbus_string_validate_utf8 (&str, 0, len)) |
| { |
| /* don't quote the actual string here, since a DBusError also needs to |
| * be valid UTF-8 */ |
| dbus_set_error (error, DBUS_ERROR_INVALID_ARGS, |
| "Interface name was not valid UTF-8"); |
| return FALSE; |
| } |
| |
| /* FIXME: later, diagnose exactly how it was invalid */ |
| dbus_set_error (error, DBUS_ERROR_INVALID_ARGS, |
| "Interface name was not valid: '%s'", name); |
| return FALSE; |
| } |
| |
| /** |
| * Check a member (method/signal) name for validity. Remember that #NULL |
| * can always be passed instead of a DBusError *, if you don't care about |
| * having an error name and message. |
| * |
| * This function is suitable for validating C strings, but is not suitable |
| * for validating untrusted data from a network unless the string's length |
| * is also checked, since it assumes that the string ends at the first zero |
| * byte according to normal C conventions. |
| * |
| * @param path a potentially invalid member name, which must not be #NULL |
| * @param error error return |
| * @returns #TRUE if name is valid |
| */ |
| dbus_bool_t |
| dbus_validate_member (const char *name, |
| DBusError *error) |
| { |
| DBusString str; |
| int len; |
| |
| _dbus_return_val_if_fail (name != NULL, FALSE); |
| |
| _dbus_string_init_const (&str, name); |
| len = _dbus_string_get_length (&str); |
| |
| /* In general, it ought to be valid... */ |
| if (_DBUS_LIKELY (_dbus_validate_member (&str, 0, len))) |
| return TRUE; |
| |
| /* slow path: string is invalid, find out why */ |
| |
| if (!_dbus_string_validate_utf8 (&str, 0, len)) |
| { |
| /* don't quote the actual string here, since a DBusError also needs to |
| * be valid UTF-8 */ |
| dbus_set_error (error, DBUS_ERROR_INVALID_ARGS, |
| "Member name was not valid UTF-8"); |
| return FALSE; |
| } |
| |
| /* FIXME: later, diagnose exactly how it was invalid */ |
| dbus_set_error (error, DBUS_ERROR_INVALID_ARGS, |
| "Member name was not valid: '%s'", name); |
| return FALSE; |
| } |
| |
| /** |
| * Check an error name for validity. Remember that #NULL |
| * can always be passed instead of a DBusError *, if you don't care about |
| * having an error name and message. |
| * |
| * This function is suitable for validating C strings, but is not suitable |
| * for validating untrusted data from a network unless the string's length |
| * is also checked, since it assumes that the string ends at the first zero |
| * byte according to normal C conventions. |
| * |
| * @param path a potentially invalid error name, which must not be #NULL |
| * @param error error return |
| * @returns #TRUE if name is valid |
| */ |
| dbus_bool_t |
| dbus_validate_error_name (const char *name, |
| DBusError *error) |
| { |
| DBusString str; |
| int len; |
| |
| _dbus_return_val_if_fail (name != NULL, FALSE); |
| |
| _dbus_string_init_const (&str, name); |
| len = _dbus_string_get_length (&str); |
| |
| /* In general, it ought to be valid... */ |
| if (_DBUS_LIKELY (_dbus_validate_error_name (&str, 0, len))) |
| return TRUE; |
| |
| /* slow path: string is invalid, find out why */ |
| |
| if (!_dbus_string_validate_utf8 (&str, 0, len)) |
| { |
| /* don't quote the actual string here, since a DBusError also needs to |
| * be valid UTF-8 */ |
| dbus_set_error (error, DBUS_ERROR_INVALID_ARGS, |
| "Error name was not valid UTF-8"); |
| return FALSE; |
| } |
| |
| /* FIXME: later, diagnose exactly how it was invalid */ |
| dbus_set_error (error, DBUS_ERROR_INVALID_ARGS, |
| "Error name was not valid: '%s'", name); |
| return FALSE; |
| } |
| |
| /** |
| * Check a bus name for validity. Remember that #NULL |
| * can always be passed instead of a DBusError *, if you don't care about |
| * having an error name and message. |
| * |
| * This function is suitable for validating C strings, but is not suitable |
| * for validating untrusted data from a network unless the string's length |
| * is also checked, since it assumes that the string ends at the first zero |
| * byte according to normal C conventions. |
| * |
| * @param path a potentially invalid bus name, which must not be #NULL |
| * @param error error return |
| * @returns #TRUE if name is valid |
| */ |
| dbus_bool_t |
| dbus_validate_bus_name (const char *name, |
| DBusError *error) |
| { |
| DBusString str; |
| int len; |
| |
| _dbus_return_val_if_fail (name != NULL, FALSE); |
| |
| _dbus_string_init_const (&str, name); |
| len = _dbus_string_get_length (&str); |
| |
| /* In general, it ought to be valid... */ |
| if (_DBUS_LIKELY (_dbus_validate_bus_name (&str, 0, len))) |
| return TRUE; |
| |
| /* slow path: string is invalid, find out why */ |
| |
| if (!_dbus_string_validate_utf8 (&str, 0, len)) |
| { |
| /* don't quote the actual string here, since a DBusError also needs to |
| * be valid UTF-8 */ |
| dbus_set_error (error, DBUS_ERROR_INVALID_ARGS, |
| "Bus name was not valid UTF-8"); |
| return FALSE; |
| } |
| |
| /* FIXME: later, diagnose exactly how it was invalid */ |
| dbus_set_error (error, DBUS_ERROR_INVALID_ARGS, |
| "Bus name was not valid: '%s'", name); |
| return FALSE; |
| } |
| |
| /** |
| * Check a string for validity. Strings on D-Bus must be valid UTF-8. |
| * Remember that #NULL can always be passed instead of a DBusError *, |
| * if you don't care about having an error name and message. |
| * |
| * This function is suitable for validating C strings, but is not suitable |
| * for validating untrusted data from a network unless the string's length |
| * is also checked, since it assumes that the string ends at the first zero |
| * byte according to normal C conventions. |
| * |
| * @param alleged_utf8 a string to be checked, which must not be #NULL |
| * @param error error return |
| * @returns #TRUE if alleged_utf8 is valid UTF-8 |
| */ |
| dbus_bool_t |
| dbus_validate_utf8 (const char *alleged_utf8, |
| DBusError *error) |
| { |
| DBusString str; |
| |
| _dbus_return_val_if_fail (alleged_utf8 != NULL, FALSE); |
| |
| _dbus_string_init_const (&str, alleged_utf8); |
| |
| if (_DBUS_LIKELY (_dbus_string_validate_utf8 (&str, 0, |
| _dbus_string_get_length (&str)))) |
| return TRUE; |
| |
| /* don't quote the actual string here, since a DBusError also needs to |
| * be valid UTF-8 */ |
| dbus_set_error (error, DBUS_ERROR_INVALID_ARGS, |
| "String was not valid UTF-8"); |
| return FALSE; |
| } |
| |
| /** @} */ /* end of group */ |