dbus/dbus-marshal-validate.h

   1 /* -*- mode: C; c-file-style: "gnu" -*- */
   2 /* dbus-marshal-validate.h  Validation routines for marshaled data
   3  *
   4  * Copyright (C) 2005  Red Hat, Inc.
   5  *
   6  * Licensed under the Academic Free License version 2.1
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  21  *
  22  */
  23
  24 #ifndef DBUS_MARSHAL_VALIDATE_H
  25 #define DBUS_MARSHAL_VALIDATE_H
  26
  27 #include <config.h>
  28
  29 #ifndef PACKAGE
  30 #error "config.h not included here"
  31 #endif
  32
  33 /**
  34  * This is used rather than a bool for high visibility
  35  */
  36 typedef enum
  37 {
  38   DBUS_VALIDATION_MODE_WE_TRUST_THIS_DATA_ABSOLUTELY,
  39   DBUS_VALIDATION_MODE_DATA_IS_UNTRUSTED
  40 } DBusValidationMode;
  41
  42 /**
  43  * This is primarily used in unit testing, so we can verify that each
  44  * invalid message is invalid for the expected reasons. Thus we really
  45  * want a distinct enum value for every codepath leaving the validator
  46  * functions. Enum values are specified manually for ease of debugging
  47  * (so you can see the enum value given a printf)
  48  */
  49 typedef enum
  50 {
  51   DBUS_INVALID_FOR_UNKNOWN_REASON = -3,
  52   DBUS_VALID_BUT_INCOMPLETE = -2,
  53   DBUS_VALIDITY_UNKNOWN = -1,
  54   DBUS_VALID = 0,
  55   DBUS_INVALID_UNKNOWN_TYPECODE = 1,
  56   DBUS_INVALID_MISSING_ARRAY_ELEMENT_TYPE = 2,
  57   DBUS_INVALID_SIGNATURE_TOO_LONG = 3,
  58   DBUS_INVALID_EXCEEDED_MAXIMUM_ARRAY_RECURSION = 4,
  59   DBUS_INVALID_EXCEEDED_MAXIMUM_STRUCT_RECURSION = 5,
  60   DBUS_INVALID_STRUCT_ENDED_BUT_NOT_STARTED = 6,
  61   DBUS_INVALID_STRUCT_STARTED_BUT_NOT_ENDED = 7,
  62   DBUS_INVALID_STRUCT_HAS_NO_FIELDS = 8,
  63   DBUS_INVALID_ALIGNMENT_PADDING_NOT_NUL = 9,
  64   DBUS_INVALID_BOOLEAN_NOT_ZERO_OR_ONE = 10,
  65   DBUS_INVALID_NOT_ENOUGH_DATA = 11,
  66   DBUS_INVALID_TOO_MUCH_DATA = 12,
  67   DBUS_INVALID_BAD_BYTE_ORDER = 13,
  68   DBUS_INVALID_BAD_PROTOCOL_VERSION = 14,
  69   DBUS_INVALID_BAD_MESSAGE_TYPE = 15,
  70   DBUS_INVALID_BAD_SERIAL = 16,
  71   DBUS_INVALID_INSANE_FIELDS_ARRAY_LENGTH = 17,
  72   DBUS_INVALID_INSANE_BODY_LENGTH = 18,
  73   DBUS_INVALID_MESSAGE_TOO_LONG = 19,
  74   DBUS_INVALID_HEADER_FIELD_CODE = 20,
  75   DBUS_INVALID_HEADER_FIELD_HAS_WRONG_TYPE = 21,
  76   DBUS_INVALID_USES_LOCAL_INTERFACE = 22,
  77   DBUS_INVALID_USES_LOCAL_PATH = 23,
  78   DBUS_INVALID_HEADER_FIELD_APPEARS_TWICE = 24,
  79   DBUS_INVALID_BAD_DESTINATION = 25,
  80   DBUS_INVALID_BAD_INTERFACE = 26,
  81   DBUS_INVALID_BAD_MEMBER = 27,
  82   DBUS_INVALID_BAD_ERROR_NAME = 28,
  83   DBUS_INVALID_BAD_SENDER = 29,
  84   DBUS_INVALID_MISSING_PATH = 30,
  85   DBUS_INVALID_MISSING_INTERFACE = 31,
  86   DBUS_INVALID_MISSING_MEMBER = 32,
  87   DBUS_INVALID_MISSING_ERROR_NAME = 33,
  88   DBUS_INVALID_MISSING_REPLY_SERIAL = 34,
  89   DBUS_INVALID_STRING_LENGTH_OUT_OF_BOUNDS = 35,
  90   DBUS_INVALID_ARRAY_LENGTH_OUT_OF_BOUNDS = 36,
  91   DBUS_INVALID_ARRAY_LENGTH_EXCEEDS_MAXIMUM = 37,
  92   DBUS_INVALID_BAD_PATH = 38,
  93   DBUS_INVALID_SIGNATURE_LENGTH_OUT_OF_BOUNDS = 39,
  94   DBUS_INVALID_BAD_SIGNATURE = 40,
  95   DBUS_INVALID_BAD_UTF8_IN_STRING = 41,
  96   DBUS_INVALID_ARRAY_LENGTH_INCORRECT = 42,
  97   DBUS_INVALID_VARIANT_SIGNATURE_LENGTH_OUT_OF_BOUNDS = 43,
  98   DBUS_INVALID_VARIANT_SIGNATURE_BAD = 44,
  99   DBUS_INVALID_VARIANT_SIGNATURE_EMPTY = 45,
 100   DBUS_INVALID_VARIANT_SIGNATURE_SPECIFIES_MULTIPLE_VALUES = 46,
 101   DBUS_INVALID_VARIANT_SIGNATURE_MISSING_NUL = 47,
 102   DBUS_INVALID_STRING_MISSING_NUL = 48,
 103   DBUS_INVALID_SIGNATURE_MISSING_NUL = 49,
 104   DBUS_INVALID_EXCEEDED_MAXIMUM_DICT_ENTRY_RECURSION = 50,
 105   DBUS_INVALID_DICT_ENTRY_ENDED_BUT_NOT_STARTED = 51,
 106   DBUS_INVALID_DICT_ENTRY_STARTED_BUT_NOT_ENDED = 52,
 107   DBUS_INVALID_DICT_ENTRY_HAS_NO_FIELDS = 53,
 108   DBUS_INVALID_DICT_ENTRY_HAS_ONLY_ONE_FIELD = 54,
 109   DBUS_INVALID_DICT_ENTRY_HAS_TOO_MANY_FIELDS = 55,
 110   DBUS_INVALID_DICT_ENTRY_NOT_INSIDE_ARRAY = 56
 111 } DBusValidity;
 112
 113 DBusValidity _dbus_validate_signature_with_reason (const DBusString *type_str,
 114                                                    int               type_pos,
 115                                                    int               len);
 116 DBusValidity _dbus_validate_body_with_reason      (const DBusString *expected_signature,
 117                                                    int               expected_signature_start,
 118                                                    int               byte_order,
 119                                                    int              *bytes_remaining,
 120                                                    const DBusString *value_str,
 121                                                    int               value_pos,
 122                                                    int               len);
 123
 124 dbus_bool_t _dbus_validate_path       (const DBusString *str,
 125                                        int               start,
 126                                        int               len);
 127 dbus_bool_t _dbus_validate_interface  (const DBusString *str,
 128                                        int               start,
 129                                        int               len);
 130 dbus_bool_t _dbus_validate_member     (const DBusString *str,
 131                                        int               start,
 132                                        int               len);
 133 dbus_bool_t _dbus_validate_error_name (const DBusString *str,
 134                                        int               start,
 135                                        int               len);
 136 dbus_bool_t _dbus_validate_bus_name   (const DBusString *str,
 137                                        int               start,
 138                                        int               len);
 139 dbus_bool_t _dbus_validate_signature  (const DBusString *str,
 140                                        int               start,
 141                                        int               len);
 142
 143 #ifdef DBUS_DISABLE_CHECKS
 144
 145 /* Be sure they don't exist, since we don't want to use them outside of checks
 146  * and so we want the compile failure.
 147  */
 148 #define DECLARE_DBUS_NAME_CHECK(what)
 149 #define DEFINE_DBUS_NAME_CHECK(what)
 150
 151 #else /* !DBUS_DISABLE_CHECKS */
 152
 153 /** A name check is used in _dbus_return_if_fail(), it's not suitable
 154  * for validating untrusted data. use _dbus_validate_##what for that.
 155  */
 156 #define DECLARE_DBUS_NAME_CHECK(what) \
 157 dbus_bool_t _dbus_check_is_valid_##what (const char *name)
 158
 159 /** Define a name check to be used in _dbus_return_if_fail() statements.
 160  */
 161 #define DEFINE_DBUS_NAME_CHECK(what)                                    \
 162 dbus_bool_t                                                             \
 163 _dbus_check_is_valid_##what (const char *name)                          \
 164 {                                                                       \
 165   DBusString str;                                                       \
 166                                                                         \
 167   if (name == NULL)                                                     \
 168     return FALSE;                                                       \
 169                                                                         \
 170   _dbus_string_init_const (&str, name);                                 \
 171   return _dbus_validate_##what (&str, 0,                                \
 172                                 _dbus_string_get_length (&str));        \
 173 }
 174 #endif /* !DBUS_DISABLE_CHECKS */
 175
 176 DECLARE_DBUS_NAME_CHECK(path);
 177 DECLARE_DBUS_NAME_CHECK(interface);
 178 DECLARE_DBUS_NAME_CHECK(member);
 179 DECLARE_DBUS_NAME_CHECK(error_name);
 180 DECLARE_DBUS_NAME_CHECK(bus_name);
 181 DECLARE_DBUS_NAME_CHECK(signature);
 182
 183 #endif /* DBUS_MARSHAL_VALIDATE_H */