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00024 #include "dbus-internals.h"
00025 #include "dbus-marshal-validate.h"
00026 #include "dbus-marshal-recursive.h"
00027 #include "dbus-marshal-basic.h"
00028 #include "dbus-signature.h"
00029 #include "dbus-string.h"
00030
00049 DBusValidity
00050 _dbus_validate_signature_with_reason (const DBusString *type_str,
00051 int type_pos,
00052 int len)
00053 {
00054 const unsigned char *p;
00055 const unsigned char *end;
00056 int last;
00057 int struct_depth;
00058 int array_depth;
00059 int dict_entry_depth;
00060 DBusValidity result;
00061
00062 int element_count;
00063 DBusList *element_count_stack;
00064
00065 result = DBUS_VALID;
00066 element_count_stack = NULL;
00067
00068 if (!_dbus_list_append (&element_count_stack, _DBUS_INT_TO_POINTER (0)))
00069 {
00070 result = DBUS_VALIDITY_UNKNOWN_OOM_ERROR;
00071 goto out;
00072 }
00073
00074 _dbus_assert (type_str != NULL);
00075 _dbus_assert (type_pos < _DBUS_INT32_MAX - len);
00076 _dbus_assert (len >= 0);
00077 _dbus_assert (type_pos >= 0);
00078
00079 if (len > DBUS_MAXIMUM_SIGNATURE_LENGTH)
00080 {
00081 result = DBUS_INVALID_SIGNATURE_TOO_LONG;
00082 goto out;
00083 }
00084
00085 p = _dbus_string_get_const_data_len (type_str, type_pos, 0);
00086
00087 end = _dbus_string_get_const_data_len (type_str, type_pos + len, 0);
00088 struct_depth = 0;
00089 array_depth = 0;
00090 dict_entry_depth = 0;
00091 last = DBUS_TYPE_INVALID;
00092
00093 while (p != end)
00094 {
00095 switch (*p)
00096 {
00097 case DBUS_TYPE_BYTE:
00098 case DBUS_TYPE_BOOLEAN:
00099 case DBUS_TYPE_INT16:
00100 case DBUS_TYPE_UINT16:
00101 case DBUS_TYPE_INT32:
00102 case DBUS_TYPE_UINT32:
00103 case DBUS_TYPE_INT64:
00104 case DBUS_TYPE_UINT64:
00105 case DBUS_TYPE_DOUBLE:
00106 case DBUS_TYPE_STRING:
00107 case DBUS_TYPE_OBJECT_PATH:
00108 case DBUS_TYPE_SIGNATURE:
00109 case DBUS_TYPE_VARIANT:
00110 break;
00111
00112 case DBUS_TYPE_ARRAY:
00113 array_depth += 1;
00114 if (array_depth > DBUS_MAXIMUM_TYPE_RECURSION_DEPTH)
00115 {
00116 result = DBUS_INVALID_EXCEEDED_MAXIMUM_ARRAY_RECURSION;
00117 goto out;
00118 }
00119 break;
00120
00121 case DBUS_STRUCT_BEGIN_CHAR:
00122 struct_depth += 1;
00123
00124 if (struct_depth > DBUS_MAXIMUM_TYPE_RECURSION_DEPTH)
00125 {
00126 result = DBUS_INVALID_EXCEEDED_MAXIMUM_STRUCT_RECURSION;
00127 goto out;
00128 }
00129
00130 if (!_dbus_list_append (&element_count_stack,
00131 _DBUS_INT_TO_POINTER (0)))
00132 {
00133 result = DBUS_VALIDITY_UNKNOWN_OOM_ERROR;
00134 goto out;
00135 }
00136
00137 break;
00138
00139 case DBUS_STRUCT_END_CHAR:
00140 if (struct_depth == 0)
00141 {
00142 result = DBUS_INVALID_STRUCT_ENDED_BUT_NOT_STARTED;
00143 goto out;
00144 }
00145
00146 if (last == DBUS_STRUCT_BEGIN_CHAR)
00147 {
00148 result = DBUS_INVALID_STRUCT_HAS_NO_FIELDS;
00149 goto out;
00150 }
00151
00152 _dbus_list_pop_last (&element_count_stack);
00153
00154 struct_depth -= 1;
00155 break;
00156
00157 case DBUS_DICT_ENTRY_BEGIN_CHAR:
00158 if (last != DBUS_TYPE_ARRAY)
00159 {
00160 result = DBUS_INVALID_DICT_ENTRY_NOT_INSIDE_ARRAY;
00161 goto out;
00162 }
00163
00164 dict_entry_depth += 1;
00165
00166 if (dict_entry_depth > DBUS_MAXIMUM_TYPE_RECURSION_DEPTH)
00167 {
00168 result = DBUS_INVALID_EXCEEDED_MAXIMUM_DICT_ENTRY_RECURSION;
00169 goto out;
00170 }
00171
00172 if (!_dbus_list_append (&element_count_stack,
00173 _DBUS_INT_TO_POINTER (0)))
00174 {
00175 result = DBUS_VALIDITY_UNKNOWN_OOM_ERROR;
00176 goto out;
00177 }
00178
00179 break;
00180
00181 case DBUS_DICT_ENTRY_END_CHAR:
00182 if (dict_entry_depth == 0)
00183 {
00184 result = DBUS_INVALID_DICT_ENTRY_ENDED_BUT_NOT_STARTED;
00185 goto out;
00186 }
00187
00188 dict_entry_depth -= 1;
00189
00190 element_count =
00191 _DBUS_POINTER_TO_INT (_dbus_list_pop_last (&element_count_stack));
00192
00193 if (element_count != 2)
00194 {
00195 if (element_count == 0)
00196 result = DBUS_INVALID_DICT_ENTRY_HAS_NO_FIELDS;
00197 else if (element_count == 1)
00198 result = DBUS_INVALID_DICT_ENTRY_HAS_ONLY_ONE_FIELD;
00199 else
00200 result = DBUS_INVALID_DICT_ENTRY_HAS_TOO_MANY_FIELDS;
00201
00202 goto out;
00203 }
00204 break;
00205
00206 case DBUS_TYPE_STRUCT:
00207 case DBUS_TYPE_DICT_ENTRY:
00208 default:
00209 result = DBUS_INVALID_UNKNOWN_TYPECODE;
00210 goto out;
00211 }
00212
00213 if (*p != DBUS_TYPE_ARRAY &&
00214 *p != DBUS_DICT_ENTRY_BEGIN_CHAR &&
00215 *p != DBUS_STRUCT_BEGIN_CHAR)
00216 {
00217 element_count =
00218 _DBUS_POINTER_TO_INT (_dbus_list_pop_last (&element_count_stack));
00219
00220 ++element_count;
00221
00222 if (!_dbus_list_append (&element_count_stack,
00223 _DBUS_INT_TO_POINTER (element_count)))
00224 {
00225 result = DBUS_VALIDITY_UNKNOWN_OOM_ERROR;
00226 goto out;
00227 }
00228 }
00229
00230 if (array_depth > 0)
00231 {
00232 if (*p == DBUS_TYPE_ARRAY && p != end)
00233 {
00234 const char *p1;
00235 p1 = p + 1;
00236 if (*p1 == DBUS_STRUCT_END_CHAR ||
00237 *p1 == DBUS_DICT_ENTRY_END_CHAR)
00238 {
00239 result = DBUS_INVALID_MISSING_ARRAY_ELEMENT_TYPE;
00240 goto out;
00241 }
00242 }
00243 else
00244 {
00245 array_depth = 0;
00246 }
00247 }
00248
00249 if (last == DBUS_DICT_ENTRY_BEGIN_CHAR)
00250 {
00251 if (!(_dbus_type_is_valid (*p) && dbus_type_is_basic (*p)))
00252 {
00253 result = DBUS_INVALID_DICT_KEY_MUST_BE_BASIC_TYPE;
00254 goto out;
00255 }
00256 }
00257
00258 last = *p;
00259 ++p;
00260 }
00261
00262
00263 if (array_depth > 0)
00264 {
00265 result = DBUS_INVALID_MISSING_ARRAY_ELEMENT_TYPE;
00266 goto out;
00267 }
00268
00269 if (struct_depth > 0)
00270 {
00271 result = DBUS_INVALID_STRUCT_STARTED_BUT_NOT_ENDED;
00272 goto out;
00273 }
00274
00275 if (dict_entry_depth > 0)
00276 {
00277 result = DBUS_INVALID_DICT_ENTRY_STARTED_BUT_NOT_ENDED;
00278 goto out;
00279 }
00280
00281 _dbus_assert (last != DBUS_TYPE_ARRAY);
00282 _dbus_assert (last != DBUS_STRUCT_BEGIN_CHAR);
00283 _dbus_assert (last != DBUS_DICT_ENTRY_BEGIN_CHAR);
00284
00285 result = DBUS_VALID;
00286
00287 out:
00288 _dbus_list_clear (&element_count_stack);
00289 return result;
00290 }
00291
00292
00293
00294
00295 static DBusValidity
00296 validate_body_helper (DBusTypeReader *reader,
00297 int byte_order,
00298 dbus_bool_t walk_reader_to_end,
00299 int total_depth,
00300 const unsigned char *p,
00301 const unsigned char *end,
00302 const unsigned char **new_p)
00303 {
00304 int current_type;
00305
00306
00307
00308
00309
00310
00311 if (total_depth > (DBUS_MAXIMUM_TYPE_RECURSION_DEPTH * 2))
00312 {
00313 return DBUS_INVALID_NESTED_TOO_DEEPLY;
00314 }
00315
00316 while ((current_type = _dbus_type_reader_get_current_type (reader)) != DBUS_TYPE_INVALID)
00317 {
00318 const unsigned char *a;
00319 int alignment;
00320
00321 #if 0
00322 _dbus_verbose (" validating value of type %s type reader %p type_pos %d p %p end %p %d remain\n",
00323 _dbus_type_to_string (current_type), reader, reader->type_pos, p, end,
00324 (int) (end - p));
00325 #endif
00326
00327
00328 if (p == end)
00329 return DBUS_INVALID_NOT_ENOUGH_DATA;
00330
00331 switch (current_type)
00332 {
00333 case DBUS_TYPE_BYTE:
00334 ++p;
00335 break;
00336
00337 case DBUS_TYPE_BOOLEAN:
00338 case DBUS_TYPE_INT16:
00339 case DBUS_TYPE_UINT16:
00340 case DBUS_TYPE_INT32:
00341 case DBUS_TYPE_UINT32:
00342 case DBUS_TYPE_INT64:
00343 case DBUS_TYPE_UINT64:
00344 case DBUS_TYPE_DOUBLE:
00345 alignment = _dbus_type_get_alignment (current_type);
00346 a = _DBUS_ALIGN_ADDRESS (p, alignment);
00347 if (a >= end)
00348 return DBUS_INVALID_NOT_ENOUGH_DATA;
00349 while (p != a)
00350 {
00351 if (*p != '\0')
00352 return DBUS_INVALID_ALIGNMENT_PADDING_NOT_NUL;
00353 ++p;
00354 }
00355
00356 if (current_type == DBUS_TYPE_BOOLEAN)
00357 {
00358 dbus_uint32_t v = _dbus_unpack_uint32 (byte_order,
00359 p);
00360 if (!(v == 0 || v == 1))
00361 return DBUS_INVALID_BOOLEAN_NOT_ZERO_OR_ONE;
00362 }
00363
00364 p += alignment;
00365 break;
00366
00367 case DBUS_TYPE_ARRAY:
00368 case DBUS_TYPE_STRING:
00369 case DBUS_TYPE_OBJECT_PATH:
00370 {
00371 dbus_uint32_t claimed_len;
00372
00373 a = _DBUS_ALIGN_ADDRESS (p, 4);
00374 if (a + 4 > end)
00375 return DBUS_INVALID_NOT_ENOUGH_DATA;
00376 while (p != a)
00377 {
00378 if (*p != '\0')
00379 return DBUS_INVALID_ALIGNMENT_PADDING_NOT_NUL;
00380 ++p;
00381 }
00382
00383 claimed_len = _dbus_unpack_uint32 (byte_order, p);
00384 p += 4;
00385
00386
00387 _dbus_assert (p <= end);
00388
00389 if (current_type == DBUS_TYPE_ARRAY)
00390 {
00391 int array_elem_type = _dbus_type_reader_get_element_type (reader);
00392 alignment = _dbus_type_get_alignment (array_elem_type);
00393 p = _DBUS_ALIGN_ADDRESS (p, alignment);
00394 }
00395
00396 if (claimed_len > (unsigned long) (end - p))
00397 return DBUS_INVALID_LENGTH_OUT_OF_BOUNDS;
00398
00399 if (current_type == DBUS_TYPE_OBJECT_PATH)
00400 {
00401 DBusString str;
00402 _dbus_string_init_const_len (&str, p, claimed_len);
00403 if (!_dbus_validate_path (&str, 0,
00404 _dbus_string_get_length (&str)))
00405 return DBUS_INVALID_BAD_PATH;
00406
00407 p += claimed_len;
00408 }
00409 else if (current_type == DBUS_TYPE_STRING)
00410 {
00411 DBusString str;
00412 _dbus_string_init_const_len (&str, p, claimed_len);
00413 if (!_dbus_string_validate_utf8 (&str, 0,
00414 _dbus_string_get_length (&str)))
00415 return DBUS_INVALID_BAD_UTF8_IN_STRING;
00416
00417 p += claimed_len;
00418 }
00419 else if (current_type == DBUS_TYPE_ARRAY && claimed_len > 0)
00420 {
00421 DBusTypeReader sub;
00422 DBusValidity validity;
00423 const unsigned char *array_end;
00424
00425 if (claimed_len > DBUS_MAXIMUM_ARRAY_LENGTH)
00426 return DBUS_INVALID_ARRAY_LENGTH_EXCEEDS_MAXIMUM;
00427
00428
00429
00430
00431
00432 _dbus_type_reader_recurse (reader, &sub);
00433
00434 array_end = p + claimed_len;
00435
00436 while (p < array_end)
00437 {
00438
00439
00440
00441
00442 validity = validate_body_helper (&sub, byte_order, FALSE,
00443 total_depth + 1,
00444 p, end, &p);
00445 if (validity != DBUS_VALID)
00446 return validity;
00447 }
00448
00449 if (p != array_end)
00450 return DBUS_INVALID_ARRAY_LENGTH_INCORRECT;
00451 }
00452
00453
00454 if (current_type != DBUS_TYPE_ARRAY)
00455 {
00456 if (p == end)
00457 return DBUS_INVALID_NOT_ENOUGH_DATA;
00458
00459 if (*p != '\0')
00460 return DBUS_INVALID_STRING_MISSING_NUL;
00461 ++p;
00462 }
00463 }
00464 break;
00465
00466 case DBUS_TYPE_SIGNATURE:
00467 {
00468 dbus_uint32_t claimed_len;
00469 DBusString str;
00470 DBusValidity validity;
00471
00472 claimed_len = *p;
00473 ++p;
00474
00475
00476 if (claimed_len + 1 > (unsigned long) (end - p))
00477 return DBUS_INVALID_SIGNATURE_LENGTH_OUT_OF_BOUNDS;
00478
00479 _dbus_string_init_const_len (&str, p, claimed_len);
00480 validity =
00481 _dbus_validate_signature_with_reason (&str, 0,
00482 _dbus_string_get_length (&str));
00483
00484 if (validity != DBUS_VALID)
00485 return validity;
00486
00487 p += claimed_len;
00488
00489 _dbus_assert (p < end);
00490 if (*p != DBUS_TYPE_INVALID)
00491 return DBUS_INVALID_SIGNATURE_MISSING_NUL;
00492
00493 ++p;
00494
00495 _dbus_verbose ("p = %p end = %p claimed_len %u\n", p, end, claimed_len);
00496 }
00497 break;
00498
00499 case DBUS_TYPE_VARIANT:
00500 {
00501
00502
00503
00504
00505
00506
00507
00508 dbus_uint32_t claimed_len;
00509 DBusString sig;
00510 DBusTypeReader sub;
00511 DBusValidity validity;
00512 int contained_alignment;
00513 int contained_type;
00514 DBusValidity reason;
00515
00516 claimed_len = *p;
00517 ++p;
00518
00519
00520 if (claimed_len + 1 > (unsigned long) (end - p))
00521 return DBUS_INVALID_VARIANT_SIGNATURE_LENGTH_OUT_OF_BOUNDS;
00522
00523 _dbus_string_init_const_len (&sig, p, claimed_len);
00524 reason = _dbus_validate_signature_with_reason (&sig, 0,
00525 _dbus_string_get_length (&sig));
00526 if (!(reason == DBUS_VALID))
00527 {
00528 if (reason == DBUS_VALIDITY_UNKNOWN_OOM_ERROR)
00529 return reason;
00530 else
00531 return DBUS_INVALID_VARIANT_SIGNATURE_BAD;
00532 }
00533
00534 p += claimed_len;
00535
00536 if (*p != DBUS_TYPE_INVALID)
00537 return DBUS_INVALID_VARIANT_SIGNATURE_MISSING_NUL;
00538 ++p;
00539
00540 contained_type = _dbus_first_type_in_signature (&sig, 0);
00541 if (contained_type == DBUS_TYPE_INVALID)
00542 return DBUS_INVALID_VARIANT_SIGNATURE_EMPTY;
00543
00544 contained_alignment = _dbus_type_get_alignment (contained_type);
00545
00546 a = _DBUS_ALIGN_ADDRESS (p, contained_alignment);
00547 if (a > end)
00548 return DBUS_INVALID_NOT_ENOUGH_DATA;
00549 while (p != a)
00550 {
00551 if (*p != '\0')
00552 return DBUS_INVALID_ALIGNMENT_PADDING_NOT_NUL;
00553 ++p;
00554 }
00555
00556 _dbus_type_reader_init_types_only (&sub, &sig, 0);
00557
00558 _dbus_assert (_dbus_type_reader_get_current_type (&sub) != DBUS_TYPE_INVALID);
00559
00560 validity = validate_body_helper (&sub, byte_order, FALSE,
00561 total_depth + 1,
00562 p, end, &p);
00563 if (validity != DBUS_VALID)
00564 return validity;
00565
00566 if (_dbus_type_reader_next (&sub))
00567 return DBUS_INVALID_VARIANT_SIGNATURE_SPECIFIES_MULTIPLE_VALUES;
00568
00569 _dbus_assert (_dbus_type_reader_get_current_type (&sub) == DBUS_TYPE_INVALID);
00570 }
00571 break;
00572
00573 case DBUS_TYPE_DICT_ENTRY:
00574 case DBUS_TYPE_STRUCT:
00575 {
00576 DBusTypeReader sub;
00577 DBusValidity validity;
00578
00579 a = _DBUS_ALIGN_ADDRESS (p, 8);
00580 if (a > end)
00581 return DBUS_INVALID_NOT_ENOUGH_DATA;
00582 while (p != a)
00583 {
00584 if (*p != '\0')
00585 return DBUS_INVALID_ALIGNMENT_PADDING_NOT_NUL;
00586 ++p;
00587 }
00588
00589 _dbus_type_reader_recurse (reader, &sub);
00590
00591 validity = validate_body_helper (&sub, byte_order, TRUE,
00592 total_depth + 1,
00593 p, end, &p);
00594 if (validity != DBUS_VALID)
00595 return validity;
00596 }
00597 break;
00598
00599 default:
00600 _dbus_assert_not_reached ("invalid typecode in supposedly-validated signature");
00601 break;
00602 }
00603
00604 #if 0
00605 _dbus_verbose (" validated value of type %s type reader %p type_pos %d p %p end %p %d remain\n",
00606 _dbus_type_to_string (current_type), reader, reader->type_pos, p, end,
00607 (int) (end - p));
00608 #endif
00609
00610 if (p > end)
00611 {
00612 _dbus_verbose ("not enough data!!! p = %p end = %p end-p = %d\n",
00613 p, end, (int) (end - p));
00614 return DBUS_INVALID_NOT_ENOUGH_DATA;
00615 }
00616
00617 if (walk_reader_to_end)
00618 _dbus_type_reader_next (reader);
00619 else
00620 break;
00621 }
00622
00623 if (new_p)
00624 *new_p = p;
00625
00626 return DBUS_VALID;
00627 }
00628
00649 DBusValidity
00650 _dbus_validate_body_with_reason (const DBusString *expected_signature,
00651 int expected_signature_start,
00652 int byte_order,
00653 int *bytes_remaining,
00654 const DBusString *value_str,
00655 int value_pos,
00656 int len)
00657 {
00658 DBusTypeReader reader;
00659 const unsigned char *p;
00660 const unsigned char *end;
00661 DBusValidity validity;
00662
00663 _dbus_assert (len >= 0);
00664 _dbus_assert (value_pos >= 0);
00665 _dbus_assert (value_pos <= _dbus_string_get_length (value_str) - len);
00666
00667 _dbus_verbose ("validating body from pos %d len %d sig '%s'\n",
00668 value_pos, len, _dbus_string_get_const_data_len (expected_signature,
00669 expected_signature_start,
00670 0));
00671
00672 _dbus_type_reader_init_types_only (&reader,
00673 expected_signature, expected_signature_start);
00674
00675 p = _dbus_string_get_const_data_len (value_str, value_pos, len);
00676 end = p + len;
00677
00678 validity = validate_body_helper (&reader, byte_order, TRUE, 0, p, end, &p);
00679 if (validity != DBUS_VALID)
00680 return validity;
00681
00682 if (bytes_remaining)
00683 {
00684 *bytes_remaining = end - p;
00685 return DBUS_VALID;
00686 }
00687 else if (p < end)
00688 return DBUS_INVALID_TOO_MUCH_DATA;
00689 else
00690 {
00691 _dbus_assert (p == end);
00692 return DBUS_VALID;
00693 }
00694 }
00695
00700 #define VALID_INITIAL_NAME_CHARACTER(c) \
00701 ( ((c) >= 'A' && (c) <= 'Z') || \
00702 ((c) >= 'a' && (c) <= 'z') || \
00703 ((c) == '_') )
00704
00709 #define VALID_NAME_CHARACTER(c) \
00710 ( ((c) >= '0' && (c) <= '9') || \
00711 ((c) >= 'A' && (c) <= 'Z') || \
00712 ((c) >= 'a' && (c) <= 'z') || \
00713 ((c) == '_') )
00714
00731 dbus_bool_t
00732 _dbus_validate_path (const DBusString *str,
00733 int start,
00734 int len)
00735 {
00736 const unsigned char *s;
00737 const unsigned char *end;
00738 const unsigned char *last_slash;
00739
00740 _dbus_assert (start >= 0);
00741 _dbus_assert (len >= 0);
00742 _dbus_assert (start <= _dbus_string_get_length (str));
00743
00744 if (len > _dbus_string_get_length (str) - start)
00745 return FALSE;
00746
00747 if (len == 0)
00748 return FALSE;
00749
00750 s = _dbus_string_get_const_data (str) + start;
00751 end = s + len;
00752
00753 if (*s != '/')
00754 return FALSE;
00755 last_slash = s;
00756 ++s;
00757
00758 while (s != end)
00759 {
00760 if (*s == '/')
00761 {
00762 if ((s - last_slash) < 2)
00763 return FALSE;
00764
00765 last_slash = s;
00766 }
00767 else
00768 {
00769 if (_DBUS_UNLIKELY (!VALID_NAME_CHARACTER (*s)))
00770 return FALSE;
00771 }
00772
00773 ++s;
00774 }
00775
00776 if ((end - last_slash) < 2 &&
00777 len > 1)
00778 return FALSE;
00779
00780 return TRUE;
00781 }
00782
00796 dbus_bool_t
00797 _dbus_validate_interface (const DBusString *str,
00798 int start,
00799 int len)
00800 {
00801 const unsigned char *s;
00802 const unsigned char *end;
00803 const unsigned char *iface;
00804 const unsigned char *last_dot;
00805
00806 _dbus_assert (start >= 0);
00807 _dbus_assert (len >= 0);
00808 _dbus_assert (start <= _dbus_string_get_length (str));
00809
00810 if (len > _dbus_string_get_length (str) - start)
00811 return FALSE;
00812
00813 if (len > DBUS_MAXIMUM_NAME_LENGTH)
00814 return FALSE;
00815
00816 if (len == 0)
00817 return FALSE;
00818
00819 last_dot = NULL;
00820 iface = _dbus_string_get_const_data (str) + start;
00821 end = iface + len;
00822 s = iface;
00823
00824
00825
00826
00827 if (_DBUS_UNLIKELY (*s == '.'))
00828 return FALSE;
00829 else if (_DBUS_UNLIKELY (!VALID_INITIAL_NAME_CHARACTER (*s)))
00830 return FALSE;
00831 else
00832 ++s;
00833
00834 while (s != end)
00835 {
00836 if (*s == '.')
00837 {
00838 if (_DBUS_UNLIKELY ((s + 1) == end))
00839 return FALSE;
00840 else if (_DBUS_UNLIKELY (!VALID_INITIAL_NAME_CHARACTER (*(s + 1))))
00841 return FALSE;
00842 last_dot = s;
00843 ++s;
00844 }
00845 else if (_DBUS_UNLIKELY (!VALID_NAME_CHARACTER (*s)))
00846 {
00847 return FALSE;
00848 }
00849
00850 ++s;
00851 }
00852
00853 if (_DBUS_UNLIKELY (last_dot == NULL))
00854 return FALSE;
00855
00856 return TRUE;
00857 }
00858
00872 dbus_bool_t
00873 _dbus_validate_member (const DBusString *str,
00874 int start,
00875 int len)
00876 {
00877 const unsigned char *s;
00878 const unsigned char *end;
00879 const unsigned char *member;
00880
00881 _dbus_assert (start >= 0);
00882 _dbus_assert (len >= 0);
00883 _dbus_assert (start <= _dbus_string_get_length (str));
00884
00885 if (len > _dbus_string_get_length (str) - start)
00886 return FALSE;
00887
00888 if (len > DBUS_MAXIMUM_NAME_LENGTH)
00889 return FALSE;
00890
00891 if (len == 0)
00892 return FALSE;
00893
00894 member = _dbus_string_get_const_data (str) + start;
00895 end = member + len;
00896 s = member;
00897
00898
00899
00900
00901
00902 if (_DBUS_UNLIKELY (!VALID_INITIAL_NAME_CHARACTER (*s)))
00903 return FALSE;
00904 else
00905 ++s;
00906
00907 while (s != end)
00908 {
00909 if (_DBUS_UNLIKELY (!VALID_NAME_CHARACTER (*s)))
00910 {
00911 return FALSE;
00912 }
00913
00914 ++s;
00915 }
00916
00917 return TRUE;
00918 }
00919
00933 dbus_bool_t
00934 _dbus_validate_error_name (const DBusString *str,
00935 int start,
00936 int len)
00937 {
00938
00939 return _dbus_validate_interface (str, start, len);
00940 }
00941
00946 #define VALID_INITIAL_BUS_NAME_CHARACTER(c) \
00947 ( ((c) >= 'A' && (c) <= 'Z') || \
00948 ((c) >= 'a' && (c) <= 'z') || \
00949 ((c) == '_') || ((c) == '-'))
00950
00955 #define VALID_BUS_NAME_CHARACTER(c) \
00956 ( ((c) >= '0' && (c) <= '9') || \
00957 ((c) >= 'A' && (c) <= 'Z') || \
00958 ((c) >= 'a' && (c) <= 'z') || \
00959 ((c) == '_') || ((c) == '-'))
00960
00974 dbus_bool_t
00975 _dbus_validate_bus_name (const DBusString *str,
00976 int start,
00977 int len)
00978 {
00979 const unsigned char *s;
00980 const unsigned char *end;
00981 const unsigned char *iface;
00982 const unsigned char *last_dot;
00983
00984 _dbus_assert (start >= 0);
00985 _dbus_assert (len >= 0);
00986 _dbus_assert (start <= _dbus_string_get_length (str));
00987
00988 if (len > _dbus_string_get_length (str) - start)
00989 return FALSE;
00990
00991 if (len > DBUS_MAXIMUM_NAME_LENGTH)
00992 return FALSE;
00993
00994 if (len == 0)
00995 return FALSE;
00996
00997 last_dot = NULL;
00998 iface = _dbus_string_get_const_data (str) + start;
00999 end = iface + len;
01000 s = iface;
01001
01002
01003
01004
01005 if (*s == ':')
01006 {
01007
01008 ++s;
01009 while (s != end)
01010 {
01011 if (*s == '.')
01012 {
01013 if (_DBUS_UNLIKELY ((s + 1) == end))
01014 return FALSE;
01015 if (_DBUS_UNLIKELY (!VALID_BUS_NAME_CHARACTER (*(s + 1))))
01016 return FALSE;
01017 ++s;
01018 }
01019 else if (_DBUS_UNLIKELY (!VALID_BUS_NAME_CHARACTER (*s)))
01020 {
01021 return FALSE;
01022 }
01023
01024 ++s;
01025 }
01026
01027 return TRUE;
01028 }
01029 else if (_DBUS_UNLIKELY (*s == '.'))
01030 return FALSE;
01031 else if (_DBUS_UNLIKELY (!VALID_INITIAL_BUS_NAME_CHARACTER (*s)))
01032 return FALSE;
01033 else
01034 ++s;
01035
01036 while (s != end)
01037 {
01038 if (*s == '.')
01039 {
01040 if (_DBUS_UNLIKELY ((s + 1) == end))
01041 return FALSE;
01042 else if (_DBUS_UNLIKELY (!VALID_INITIAL_BUS_NAME_CHARACTER (*(s + 1))))
01043 return FALSE;
01044 last_dot = s;
01045 ++s;
01046 }
01047 else if (_DBUS_UNLIKELY (!VALID_BUS_NAME_CHARACTER (*s)))
01048 {
01049 return FALSE;
01050 }
01051
01052 ++s;
01053 }
01054
01055 if (_DBUS_UNLIKELY (last_dot == NULL))
01056 return FALSE;
01057
01058 return TRUE;
01059 }
01060
01073 dbus_bool_t
01074 _dbus_validate_signature (const DBusString *str,
01075 int start,
01076 int len)
01077 {
01078 _dbus_assert (start >= 0);
01079 _dbus_assert (start <= _dbus_string_get_length (str));
01080 _dbus_assert (len >= 0);
01081
01082 if (len > _dbus_string_get_length (str) - start)
01083 return FALSE;
01084
01085 return _dbus_validate_signature_with_reason (str, start, len) == DBUS_VALID;
01086 }
01087
01089 DEFINE_DBUS_NAME_CHECK(path);
01091 DEFINE_DBUS_NAME_CHECK(interface);
01093 DEFINE_DBUS_NAME_CHECK(member);
01095 DEFINE_DBUS_NAME_CHECK(error_name);
01097 DEFINE_DBUS_NAME_CHECK(bus_name);
01099 DEFINE_DBUS_NAME_CHECK(signature);
01100
01103