| // Copyright 2013 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "lib/url/url_canon_internal.h" |
| |
| #include <errno.h> |
| #include <stdlib.h> |
| |
| #include <cstdio> |
| #include <string> |
| |
| #include "lib/fxl/strings/utf_codecs.h" |
| #include "lib/fxl/third_party/icu/icu_utf.h" |
| |
| namespace url { |
| |
| namespace { |
| |
| // This function assumes the input values are all contained in 8-bit, |
| // although it allows any type. Returns true if input is valid, false if not. |
| template <typename CHAR, typename UCHAR> |
| void DoAppendInvalidNarrowString(const CHAR* spec, size_t begin, size_t end, |
| CanonOutput* output) { |
| for (size_t i = begin; i < end; i++) { |
| UCHAR uch = static_cast<UCHAR>(spec[i]); |
| if (uch >= 0x80) { |
| // Handle UTF-8/16 encodings. This call will correctly handle the error |
| // case by appending the invalid character. |
| AppendUTF8EscapedChar(spec, &i, end, output); |
| } else if (uch <= ' ' || uch == 0x7f) { |
| // This function is for error handling, so we escape all control |
| // characters and spaces, but not anything else since we lack |
| // context to do something more specific. |
| AppendEscapedChar(static_cast<unsigned char>(uch), output); |
| } else { |
| output->push_back(static_cast<char>(uch)); |
| } |
| } |
| } |
| |
| static inline bool ReadUnicodeCharacter(const uint16_t* src, size_t src_len, |
| size_t* char_index, |
| uint32_t* code_point) { |
| if (FXL_U16_IS_SURROGATE(src[*char_index])) { |
| if (!FXL_U16_IS_SURROGATE_LEAD(src[*char_index]) || |
| *char_index + 1 >= src_len || !FXL_U16_IS_TRAIL(src[*char_index + 1])) { |
| // Invalid surrogate pair. |
| return false; |
| } |
| |
| // Valid surrogate pair. |
| *code_point = |
| FXL_U16_GET_SUPPLEMENTARY(src[*char_index], src[*char_index + 1]); |
| (*char_index)++; |
| } else { |
| // Not a surrogate, just one 16-bit word. |
| *code_point = src[*char_index]; |
| } |
| |
| return fxl::IsValidCodepoint(*code_point); |
| } |
| |
| } // namespace |
| |
| // See the header file for this array's declaration. |
| // clang-format off |
| const unsigned char kSharedCharTypeTable[0x100] = { |
| 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 0x00 - 0x0f |
| 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 0x10 - 0x1f |
| 0, // 0x20 ' ' (escape spaces in queries) |
| CHAR_QUERY | CHAR_USERINFO | CHAR_COMPONENT, // 0x21 ! |
| 0, // 0x22 " |
| 0, // 0x23 # (invalid in query since it marks the ref) |
| CHAR_QUERY | CHAR_USERINFO, // 0x24 $ |
| CHAR_QUERY | CHAR_USERINFO, // 0x25 % |
| CHAR_QUERY | CHAR_USERINFO, // 0x26 & |
| 0, // 0x27 ' (Try to prevent XSS.) |
| CHAR_QUERY | CHAR_USERINFO | CHAR_COMPONENT, // 0x28 ( |
| CHAR_QUERY | CHAR_USERINFO | CHAR_COMPONENT, // 0x29 ) |
| CHAR_QUERY | CHAR_USERINFO | CHAR_COMPONENT, // 0x2a * |
| CHAR_QUERY | CHAR_USERINFO, // 0x2b + |
| CHAR_QUERY | CHAR_USERINFO, // 0x2c , |
| CHAR_QUERY | CHAR_USERINFO | CHAR_COMPONENT, // 0x2d - |
| CHAR_QUERY | CHAR_USERINFO | CHAR_IPV4 | CHAR_COMPONENT, // 0x2e . |
| CHAR_QUERY, // 0x2f / |
| CHAR_QUERY | CHAR_USERINFO | CHAR_IPV4 | CHAR_HEX | CHAR_DEC | CHAR_OCT | CHAR_COMPONENT, // 0x30 0 |
| CHAR_QUERY | CHAR_USERINFO | CHAR_IPV4 | CHAR_HEX | CHAR_DEC | CHAR_OCT | CHAR_COMPONENT, // 0x31 1 |
| CHAR_QUERY | CHAR_USERINFO | CHAR_IPV4 | CHAR_HEX | CHAR_DEC | CHAR_OCT | CHAR_COMPONENT, // 0x32 2 |
| CHAR_QUERY | CHAR_USERINFO | CHAR_IPV4 | CHAR_HEX | CHAR_DEC | CHAR_OCT | CHAR_COMPONENT, // 0x33 3 |
| CHAR_QUERY | CHAR_USERINFO | CHAR_IPV4 | CHAR_HEX | CHAR_DEC | CHAR_OCT | CHAR_COMPONENT, // 0x34 4 |
| CHAR_QUERY | CHAR_USERINFO | CHAR_IPV4 | CHAR_HEX | CHAR_DEC | CHAR_OCT | CHAR_COMPONENT, // 0x35 5 |
| CHAR_QUERY | CHAR_USERINFO | CHAR_IPV4 | CHAR_HEX | CHAR_DEC | CHAR_OCT | CHAR_COMPONENT, // 0x36 6 |
| CHAR_QUERY | CHAR_USERINFO | CHAR_IPV4 | CHAR_HEX | CHAR_DEC | CHAR_OCT | CHAR_COMPONENT, // 0x37 7 |
| CHAR_QUERY | CHAR_USERINFO | CHAR_IPV4 | CHAR_HEX | CHAR_DEC | CHAR_COMPONENT, // 0x38 8 |
| CHAR_QUERY | CHAR_USERINFO | CHAR_IPV4 | CHAR_HEX | CHAR_DEC | CHAR_COMPONENT, // 0x39 9 |
| CHAR_QUERY, // 0x3a : |
| CHAR_QUERY, // 0x3b ; |
| 0, // 0x3c < (Try to prevent certain types of XSS.) |
| CHAR_QUERY, // 0x3d = |
| 0, // 0x3e > (Try to prevent certain types of XSS.) |
| CHAR_QUERY, // 0x3f ? |
| CHAR_QUERY, // 0x40 @ |
| CHAR_QUERY | CHAR_USERINFO | CHAR_IPV4 | CHAR_HEX | CHAR_COMPONENT, // 0x41 A |
| CHAR_QUERY | CHAR_USERINFO | CHAR_IPV4 | CHAR_HEX | CHAR_COMPONENT, // 0x42 B |
| CHAR_QUERY | CHAR_USERINFO | CHAR_IPV4 | CHAR_HEX | CHAR_COMPONENT, // 0x43 C |
| CHAR_QUERY | CHAR_USERINFO | CHAR_IPV4 | CHAR_HEX | CHAR_COMPONENT, // 0x44 D |
| CHAR_QUERY | CHAR_USERINFO | CHAR_IPV4 | CHAR_HEX | CHAR_COMPONENT, // 0x45 E |
| CHAR_QUERY | CHAR_USERINFO | CHAR_IPV4 | CHAR_HEX | CHAR_COMPONENT, // 0x46 F |
| CHAR_QUERY | CHAR_USERINFO | CHAR_COMPONENT, // 0x47 G |
| CHAR_QUERY | CHAR_USERINFO | CHAR_COMPONENT, // 0x48 H |
| CHAR_QUERY | CHAR_USERINFO | CHAR_COMPONENT, // 0x49 I |
| CHAR_QUERY | CHAR_USERINFO | CHAR_COMPONENT, // 0x4a J |
| CHAR_QUERY | CHAR_USERINFO | CHAR_COMPONENT, // 0x4b K |
| CHAR_QUERY | CHAR_USERINFO | CHAR_COMPONENT, // 0x4c L |
| CHAR_QUERY | CHAR_USERINFO | CHAR_COMPONENT, // 0x4d M |
| CHAR_QUERY | CHAR_USERINFO | CHAR_COMPONENT, // 0x4e N |
| CHAR_QUERY | CHAR_USERINFO | CHAR_COMPONENT, // 0x4f O |
| CHAR_QUERY | CHAR_USERINFO | CHAR_COMPONENT, // 0x50 P |
| CHAR_QUERY | CHAR_USERINFO | CHAR_COMPONENT, // 0x51 Q |
| CHAR_QUERY | CHAR_USERINFO | CHAR_COMPONENT, // 0x52 R |
| CHAR_QUERY | CHAR_USERINFO | CHAR_COMPONENT, // 0x53 S |
| CHAR_QUERY | CHAR_USERINFO | CHAR_COMPONENT, // 0x54 T |
| CHAR_QUERY | CHAR_USERINFO | CHAR_COMPONENT, // 0x55 U |
| CHAR_QUERY | CHAR_USERINFO | CHAR_COMPONENT, // 0x56 V |
| CHAR_QUERY | CHAR_USERINFO | CHAR_COMPONENT, // 0x57 W |
| CHAR_QUERY | CHAR_USERINFO | CHAR_IPV4 | CHAR_COMPONENT, // 0x58 X |
| CHAR_QUERY | CHAR_USERINFO | CHAR_COMPONENT, // 0x59 Y |
| CHAR_QUERY | CHAR_USERINFO | CHAR_COMPONENT, // 0x5a Z |
| CHAR_QUERY, // 0x5b [ |
| CHAR_QUERY, // 0x5c '\' |
| CHAR_QUERY, // 0x5d ] |
| CHAR_QUERY, // 0x5e ^ |
| CHAR_QUERY | CHAR_USERINFO | CHAR_COMPONENT, // 0x5f _ |
| CHAR_QUERY, // 0x60 ` |
| CHAR_QUERY | CHAR_USERINFO | CHAR_IPV4 | CHAR_HEX | CHAR_COMPONENT, // 0x61 a |
| CHAR_QUERY | CHAR_USERINFO | CHAR_IPV4 | CHAR_HEX | CHAR_COMPONENT, // 0x62 b |
| CHAR_QUERY | CHAR_USERINFO | CHAR_IPV4 | CHAR_HEX | CHAR_COMPONENT, // 0x63 c |
| CHAR_QUERY | CHAR_USERINFO | CHAR_IPV4 | CHAR_HEX | CHAR_COMPONENT, // 0x64 d |
| CHAR_QUERY | CHAR_USERINFO | CHAR_IPV4 | CHAR_HEX | CHAR_COMPONENT, // 0x65 e |
| CHAR_QUERY | CHAR_USERINFO | CHAR_IPV4 | CHAR_HEX | CHAR_COMPONENT, // 0x66 f |
| CHAR_QUERY | CHAR_USERINFO | CHAR_COMPONENT, // 0x67 g |
| CHAR_QUERY | CHAR_USERINFO | CHAR_COMPONENT, // 0x68 h |
| CHAR_QUERY | CHAR_USERINFO | CHAR_COMPONENT, // 0x69 i |
| CHAR_QUERY | CHAR_USERINFO | CHAR_COMPONENT, // 0x6a j |
| CHAR_QUERY | CHAR_USERINFO | CHAR_COMPONENT, // 0x6b k |
| CHAR_QUERY | CHAR_USERINFO | CHAR_COMPONENT, // 0x6c l |
| CHAR_QUERY | CHAR_USERINFO | CHAR_COMPONENT, // 0x6d m |
| CHAR_QUERY | CHAR_USERINFO | CHAR_COMPONENT, // 0x6e n |
| CHAR_QUERY | CHAR_USERINFO | CHAR_COMPONENT, // 0x6f o |
| CHAR_QUERY | CHAR_USERINFO | CHAR_COMPONENT, // 0x70 p |
| CHAR_QUERY | CHAR_USERINFO | CHAR_COMPONENT, // 0x71 q |
| CHAR_QUERY | CHAR_USERINFO | CHAR_COMPONENT, // 0x72 r |
| CHAR_QUERY | CHAR_USERINFO | CHAR_COMPONENT, // 0x73 s |
| CHAR_QUERY | CHAR_USERINFO | CHAR_COMPONENT, // 0x74 t |
| CHAR_QUERY | CHAR_USERINFO | CHAR_COMPONENT, // 0x75 u |
| CHAR_QUERY | CHAR_USERINFO | CHAR_COMPONENT, // 0x76 v |
| CHAR_QUERY | CHAR_USERINFO | CHAR_COMPONENT, // 0x77 w |
| CHAR_QUERY | CHAR_USERINFO | CHAR_IPV4 | CHAR_COMPONENT, // 0x78 x |
| CHAR_QUERY | CHAR_USERINFO | CHAR_COMPONENT, // 0x79 y |
| CHAR_QUERY | CHAR_USERINFO | CHAR_COMPONENT, // 0x7a z |
| CHAR_QUERY, // 0x7b { |
| CHAR_QUERY, // 0x7c | |
| CHAR_QUERY, // 0x7d } |
| CHAR_QUERY | CHAR_USERINFO | CHAR_COMPONENT, // 0x7e ~ |
| 0, // 0x7f |
| 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 0x80 - 0x8f |
| 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 0x90 - 0x9f |
| 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 0xa0 - 0xaf |
| 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 0xb0 - 0xbf |
| 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 0xc0 - 0xcf |
| 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 0xd0 - 0xdf |
| 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 0xe0 - 0xef |
| 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 0xf0 - 0xff |
| }; |
| // clang-format on |
| |
| const char kHexCharLookup[0x10] = { |
| '0', '1', '2', '3', '4', '5', '6', '7', |
| '8', '9', 'A', 'B', 'C', 'D', 'E', 'F', |
| }; |
| |
| const char kCharToHexLookup[8] = { |
| 0, // 0x00 - 0x1f |
| '0', // 0x20 - 0x3f: digits 0 - 9 are 0x30 - 0x39 |
| 'A' - 10, // 0x40 - 0x5f: letters A - F are 0x41 - 0x46 |
| 'a' - 10, // 0x60 - 0x7f: letters a - f are 0x61 - 0x66 |
| 0, // 0x80 - 0x9F |
| 0, // 0xA0 - 0xBF |
| 0, // 0xC0 - 0xDF |
| 0, // 0xE0 - 0xFF |
| }; |
| |
| const uint32_t kUnicodeReplacementCharacter = 0xfffd; |
| |
| void AppendStringOfType(const char* source, size_t length, SharedCharTypes type, |
| CanonOutput* output) { |
| for (size_t i = 0; i < length; i++) { |
| if (static_cast<unsigned char>(source[i]) >= 0x80) { |
| // ReadChar will fill the code point with kUnicodeReplacementCharacter |
| // when the input is invalid, which is what we want. |
| unsigned code_point; |
| ReadUTFChar(source, &i, length, &code_point); |
| AppendUTF8EscapedValue(code_point, output); |
| } else { |
| // Just append the 7-bit character, possibly escaping it. |
| unsigned char uch = static_cast<unsigned char>(source[i]); |
| if (!IsCharOfType(uch, type)) |
| AppendEscapedChar(uch, output); |
| else |
| output->push_back(uch); |
| } |
| } |
| } |
| |
| bool ReadUTFChar(const char* str, size_t* begin, size_t length, |
| uint32_t* code_point_out) { |
| // This depends on ints and int32s being the same thing. If they're not, it |
| // will fail to compile. |
| // TODO(mmenke): This should probably be fixed. |
| if (!fxl::ReadUnicodeCharacter(str, length, begin, code_point_out) || |
| !fxl::IsValidCharacter(*code_point_out)) { |
| *code_point_out = kUnicodeReplacementCharacter; |
| return false; |
| } |
| return true; |
| } |
| |
| bool ReadUTFChar(const uint16_t* str, size_t* begin, size_t length, |
| unsigned* code_point_out) { |
| // This depends on ints and int32s being the same thing. If they're not, it |
| // will fail to compile. |
| // TODO(mmenke): This should probably be fixed. |
| if (!ReadUnicodeCharacter(str, length, begin, code_point_out) || |
| !fxl::IsValidCharacter(*code_point_out)) { |
| *code_point_out = kUnicodeReplacementCharacter; |
| return false; |
| } |
| return true; |
| } |
| |
| void AppendInvalidNarrowString(const char* spec, size_t begin, size_t end, |
| CanonOutput* output) { |
| DoAppendInvalidNarrowString<char, unsigned char>(spec, begin, end, output); |
| } |
| |
| void AppendInvalidNarrowString(const uint16_t* spec, size_t begin, size_t end, |
| CanonOutput* output) { |
| DoAppendInvalidNarrowString<uint16_t, uint16_t>(spec, begin, end, output); |
| } |
| |
| bool ConvertUTF16ToUTF8(const uint16_t* input, size_t input_len, |
| CanonOutput* output) { |
| bool success = true; |
| for (size_t i = 0; i < input_len; i++) { |
| unsigned code_point; |
| success &= ReadUTFChar(input, &i, input_len, &code_point); |
| AppendUTF8Value(code_point, output); |
| } |
| return success; |
| } |
| |
| bool ConvertUTF8ToUTF16(const char* input, size_t input_len, |
| CanonOutputT<uint16_t>* output) { |
| bool success = true; |
| for (size_t i = 0; i < input_len; i++) { |
| unsigned code_point; |
| success &= ReadUTFChar(input, &i, input_len, &code_point); |
| AppendUTF16Value(code_point, output); |
| } |
| return success; |
| } |
| |
| int IntToString(int value, char* buffer, size_t size_in_chars, int radix) { |
| const char* format_str; |
| if (radix == 10) |
| format_str = "%d"; |
| else if (radix == 16) |
| format_str = "%x"; |
| else |
| return EINVAL; |
| |
| size_t written = snprintf(buffer, size_in_chars, format_str, value); |
| if (written >= size_in_chars) { |
| // Output was truncated, or written was negative. |
| return EINVAL; |
| } |
| return 0; |
| } |
| |
| } // namespace url |
