mirror of
https://github.com/LadybirdBrowser/ladybird.git
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LibUnicode: Replace IDNA ASCII conversion with ICU
This commit is contained in:
Timothy Flynn
Andreas Kling
parent
83475c5380
commit
8d7216f4e0
Notes:
sideshowbarker
2024-07-17 05:00:08 +09:00
Author: https://github.com/trflynn89 Commit: https://github.com/LadybirdBrowser/ladybird/commit/8d7216f4e0 Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/201
@ -3,7 +3,6 @@ include(${CMAKE_CURRENT_LIST_DIR}/utils.cmake)
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set(UCD_VERSION "15.1.0")
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set(UCD_SHA256 "cb1c663d053926500cd501229736045752713a066bd75802098598b7a7056177")
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set(EMOJI_SHA256 "d876ee249aa28eaa76cfa6dfaa702847a8d13b062aa488d465d0395ee8137ed9")
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set(IDNA_SHA256 "402cbd285f1f952fcd0834b63541d54f69d3d8f1b8f8599bf71a1a14935f82c4")
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set(UCD_PATH "${SERENITY_CACHE_DIR}/UCD" CACHE PATH "Download location for UCD files")
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set(UCD_VERSION_FILE "${UCD_PATH}/version.txt")
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@ -67,9 +66,6 @@ set(EMOJI_SERENITY_PATH "${SerenityOS_SOURCE_DIR}/Base/home/anon/Documents/emoji
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set(EMOJI_FILE_LIST_PATH "${SerenityOS_SOURCE_DIR}/Meta/emoji-file-list.txt")
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set(EMOJI_INSTALL_PATH "${CMAKE_BINARY_DIR}/Root/home/anon/Documents/emoji.txt")
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set(IDNA_MAPPING_TABLE_URL "https://www.unicode.org/Public/idna/${UCD_VERSION}/IdnaMappingTable.txt")
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set(IDNA_MAPPING_TABLE_PATH "${UCD_PATH}/IdnaMappingTable.txt")
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if (ENABLE_UNICODE_DATABASE_DOWNLOAD)
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remove_path_if_version_changed("${UCD_VERSION}" "${UCD_VERSION_FILE}" "${UCD_PATH}")
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@ -93,12 +89,9 @@ if (ENABLE_UNICODE_DATABASE_DOWNLOAD)
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extract_path("${UCD_PATH}" "${UCD_ZIP_PATH}" "${SENTENCE_BREAK_PROP_SOURCE}" "${SENTENCE_BREAK_PROP_PATH}")
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download_file("${EMOJI_TEST_URL}" "${EMOJI_TEST_PATH}" SHA256 "${EMOJI_SHA256}")
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download_file("${IDNA_MAPPING_TABLE_URL}" "${IDNA_MAPPING_TABLE_PATH}" SHA256 "${IDNA_SHA256}")
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else()
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message(STATUS "Skipping download of ${UCD_ZIP_URL}, expecting the archive to have been extracted to ${UCD_ZIP_PATH}")
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message(STATUS "Skipping download of ${EMOJI_TEST_URL}, expecting the file to be at ${EMOJI_TEST_PATH}")
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message(STATUS "Skipping download of ${IDNA_MAPPING_TABLE_URL}, expecting the file to be at ${IDNA_MAPPING_TABLE_PATH}")
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endif()
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@ -108,9 +101,6 @@ if (ENABLE_UNICODE_DATABASE_DOWNLOAD)
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set(EMOJI_DATA_HEADER EmojiData.h)
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set(EMOJI_DATA_IMPLEMENTATION EmojiData.cpp)
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set(IDNA_DATA_HEADER IDNAData.h)
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set(IDNA_DATA_IMPLEMENTATION IDNAData.cpp)
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if (SERENITYOS)
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set(EMOJI_INSTALL_ARG -i "${EMOJI_INSTALL_PATH}")
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endif()
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@ -137,21 +127,11 @@ if (ENABLE_UNICODE_DATABASE_DOWNLOAD)
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# the generated emoji.txt file.
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dependencies "${EMOJI_RES_PATH}" "${EMOJI_SERENITY_PATH}" "${EMOJI_FILE_LIST_PATH}"
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)
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invoke_generator(
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"IDNAData"
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Lagom::GenerateIDNAData
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"${UCD_VERSION_FILE}"
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"${IDNA_DATA_HEADER}"
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"${IDNA_DATA_IMPLEMENTATION}"
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arguments -m "${IDNA_MAPPING_TABLE_PATH}"
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)
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set(UNICODE_DATA_SOURCES
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${UNICODE_DATA_HEADER}
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${UNICODE_DATA_IMPLEMENTATION}
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${EMOJI_DATA_HEADER}
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${EMOJI_DATA_IMPLEMENTATION}
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${IDNA_DATA_HEADER}
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${IDNA_DATA_IMPLEMENTATION}
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)
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endif()
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@ -1,3 +1,2 @@
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lagom_tool(GenerateUnicodeData SOURCES GenerateUnicodeData.cpp LIBS LibMain)
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lagom_tool(GenerateEmojiData SOURCES GenerateEmojiData.cpp LIBS LibMain)
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lagom_tool(GenerateIDNAData SOURCES GenerateIDNAData.cpp LIBS LibMain)
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@ -1,235 +0,0 @@
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/*
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* Copyright (c) 2023, Simon Wanner <simon@skyrising.xyz>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include "GeneratorUtil.h"
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#include <AK/Error.h>
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#include <AK/SourceGenerator.h>
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#include <AK/Types.h>
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#include <LibCore/ArgsParser.h>
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enum class MappingStatus : u8 {
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Valid,
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Ignored,
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Mapped,
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Deviation,
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Disallowed,
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DisallowedStd3Valid,
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DisallowedStd3Mapped,
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};
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static constexpr Array<StringView, 7> mapping_status_names { "Valid"sv, "Ignored"sv, "Mapped"sv, "Deviation"sv, "Disallowed"sv, "DisallowedStd3Valid"sv, "DisallowedStd3Mapped"sv };
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enum class IDNA2008Status : u8 {
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NV8,
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XV8,
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};
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static constexpr Array<StringView, 2> idna_2008_status_names { "NV8"sv, "XV8"sv };
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struct IDNAMapping {
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Unicode::CodePointRange code_points;
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MappingStatus status;
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IDNA2008Status idna_2008_status;
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Vector<u32> mapped_to {};
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};
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struct IDNAData {
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Vector<IDNAMapping> mapping_table;
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};
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static MappingStatus parse_mapping_status(StringView status)
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{
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if (status == "valid"sv)
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return MappingStatus::Valid;
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if (status == "ignored"sv)
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return MappingStatus::Ignored;
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if (status == "mapped"sv)
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return MappingStatus::Mapped;
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if (status == "deviation"sv)
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return MappingStatus::Deviation;
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if (status == "disallowed"sv)
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return MappingStatus::Disallowed;
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if (status == "disallowed_STD3_valid"sv)
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return MappingStatus::DisallowedStd3Valid;
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if (status == "disallowed_STD3_mapped"sv)
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return MappingStatus::DisallowedStd3Mapped;
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VERIFY_NOT_REACHED();
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}
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static ErrorOr<void> parse_idna_mapping_table(Core::InputBufferedFile& file, Vector<IDNAMapping>& mapping_table)
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{
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Array<u8, 1024> buffer;
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while (TRY(file.can_read_line())) {
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auto line = TRY(file.read_line(buffer));
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if (line.is_empty() || line.starts_with('#'))
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continue;
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if (auto index = line.find('#'); index.has_value())
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line = line.substring_view(0, *index);
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auto segments = line.split_view(';', SplitBehavior::KeepEmpty);
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VERIFY(segments.size() >= 2);
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IDNAMapping idna_mapping {};
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idna_mapping.code_points = parse_code_point_range(segments[0].trim_whitespace());
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idna_mapping.status = parse_mapping_status(segments[1].trim_whitespace());
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if (segments.size() >= 3)
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idna_mapping.mapped_to = parse_code_point_list(segments[2].trim_whitespace());
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if (segments.size() >= 4) {
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auto trimmed = segments[3].trim_whitespace();
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if (trimmed == "NV8"sv) {
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idna_mapping.idna_2008_status = IDNA2008Status::NV8;
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} else {
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VERIFY(trimmed == "XV8"sv);
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idna_mapping.idna_2008_status = IDNA2008Status::XV8;
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}
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}
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TRY(mapping_table.try_append(move(idna_mapping)));
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}
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return {};
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}
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static ErrorOr<void> generate_idna_data_header(Core::InputBufferedFile& file, IDNAData&)
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{
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StringBuilder builder;
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SourceGenerator generator { builder };
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generator.append(R"~~~(
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#pragma once
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namespace Unicode::IDNA {
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}
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)~~~");
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TRY(file.write_until_depleted(generator.as_string_view().bytes()));
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return {};
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}
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static ErrorOr<void> generate_idna_data_implementation(Core::InputBufferedFile& file, IDNAData& idna_data)
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{
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StringBuilder builder;
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SourceGenerator generator { builder };
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generator.set("idna_table_size", TRY(String::number(idna_data.mapping_table.size())));
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generator.append(R"~~~(
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#include <AK/BinarySearch.h>
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#include <AK/Optional.h>
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#include <AK/Utf32View.h>
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#include <LibUnicode/CharacterTypes.h>
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#include <LibUnicode/IDNA.h>
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#include <LibUnicode/IDNAData.h>
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namespace Unicode::IDNA {
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struct MappingEntry {
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CodePointRange code_points {};
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MappingStatus status : 3 { MappingStatus::Valid };
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IDNA2008Status idna_2008_status : 1 { IDNA2008Status::NV8 };
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size_t mapping_offset : 20 { 0 };
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size_t mapping_length : 8 { 0 };
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};
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static constexpr Array<MappingEntry, @idna_table_size@> s_idna_mapping_table { {)~~~");
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{
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size_t mapping_offset = 0;
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for (auto const& mapping : idna_data.mapping_table) {
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generator.set("code_points", TRY(String::formatted("{:#x}, {:#x}", mapping.code_points.first, mapping.code_points.last)));
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generator.set("status", mapping_status_names[to_underlying(mapping.status)]);
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generator.set("idna_2008_status", idna_2008_status_names[to_underlying(mapping.idna_2008_status)]);
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if (mapping.mapped_to.is_empty()) {
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generator.set("mapping_offset", "0"sv);
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generator.set("mapping_length", "0"sv);
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} else {
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generator.set("mapping_offset", TRY(String::number(mapping_offset)));
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generator.set("mapping_length", TRY(String::number(mapping.mapped_to.size())));
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mapping_offset += mapping.mapped_to.size();
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}
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generator.append(R"~~~(
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{ { @code_points@ }, MappingStatus::@status@, IDNA2008Status::@idna_2008_status@, @mapping_offset@, @mapping_length@ },)~~~");
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}
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generator.set("mapping_length_total", TRY(String::number(mapping_offset)));
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}
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generator.append(R"~~~(
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} };
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static constexpr Array<u32, @mapping_length_total@> s_mapping_code_points { )~~~");
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{
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for (auto const& mapping : idna_data.mapping_table) {
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if (mapping.mapped_to.is_empty())
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continue;
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for (u32 code_point : mapping.mapped_to)
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generator.append(TRY(String::formatted("{:#x}, ", code_point)));
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generator.append(R"~~~(
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)~~~");
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}
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}
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generator.append(R"~~~(
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};
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Optional<Mapping> get_idna_mapping(u32 code_point)
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{
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auto* entry = binary_search(s_idna_mapping_table, code_point, nullptr, [](auto code_point, auto entry) {
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if (code_point < entry.code_points.first)
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return -1;
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if (code_point > entry.code_points.last)
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return 1;
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return 0;
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});
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if (!entry)
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return {};
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auto mapped_to = Utf32View { entry->mapping_length ? s_mapping_code_points.data() + entry->mapping_offset : nullptr, entry->mapping_length };
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return Mapping { entry->status, entry->idna_2008_status, move(mapped_to) };
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}
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}
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)~~~");
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TRY(file.write_until_depleted(generator.as_string_view().bytes()));
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return {};
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}
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ErrorOr<int> serenity_main(Main::Arguments arguments)
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{
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StringView generated_header_path;
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StringView generated_implementation_path;
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StringView idna_mapping_table_path;
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Core::ArgsParser args_parser;
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args_parser.add_option(generated_header_path, "Path to the IDNA Data header file to generate", "generated-header-path", 'h', "generated-header-path");
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args_parser.add_option(generated_implementation_path, "Path to the IDNA Data implementation file to generate", "generated-implementation-path", 'c', "generated-implementation-path");
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args_parser.add_option(idna_mapping_table_path, "Path to IdnaMappingTable.txt file", "idna-mapping-table-path", 'm', "idna-mapping-table-path");
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args_parser.parse(arguments);
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auto generated_header_file = TRY(open_file(generated_header_path, Core::File::OpenMode::Write));
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auto generated_implementation_file = TRY(open_file(generated_implementation_path, Core::File::OpenMode::Write));
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auto idna_mapping_table_file = TRY(open_file(idna_mapping_table_path, Core::File::OpenMode::Read));
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IDNAData idna_data {};
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TRY(parse_idna_mapping_table(*idna_mapping_table_file, idna_data.mapping_table));
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TRY(generate_idna_data_header(*generated_header_file, idna_data));
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TRY(generate_idna_data_implementation(*generated_implementation_file, idna_data));
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return 0;
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}
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@ -1,7 +1,6 @@
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set(TEST_SOURCES
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TestEmoji.cpp
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TestIDNA.cpp
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TestPunycode.cpp
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TestSegmentation.cpp
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TestUnicodeCharacterTypes.cpp
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TestUnicodeNormalization.cpp
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@ -9,6 +8,4 @@ set(TEST_SOURCES
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foreach(source IN LISTS TEST_SOURCES)
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serenity_test("${source}" LibUnicode LIBS LibUnicode)
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get_filename_component(target "${source}" NAME_WLE)
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endforeach()
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@ -1,57 +0,0 @@
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/*
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* Copyright (c) 2023, Simon Wanner <simon@skyrising.xyz>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <LibTest/TestCase.h>
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#include <LibUnicode/Punycode.h>
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namespace Unicode::Punycode {
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#define ENUMERATE_TEST_CASES \
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CASE(""sv, ""sv) \
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CASE("Well hello friends!"sv, "Well hello friends!-"sv) \
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CASE("Well-hello-friends"sv, "Well-hello-friends-"sv) \
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CASE("Wгellд-бhellбвo"sv, "Well-hello-friends"sv) \
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CASE("Hallöchen Freunde!"sv, "Hallchen Freunde!-2zb"sv) \
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CASE("Nåväl hej vänner"sv, "Nvl hej vnner-cfbhg"sv) \
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CASE("Ну привіт друзі"sv, " -kjc9flsd9cjetgj5xg"sv) \
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CASE("ليهمابتكلموشعربي؟"sv, "egbpdaj6bu4bxfgehfvwxn"sv) \
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CASE("他们为什么不说中文"sv, "ihqwcrb4cv8a8dqg056pqjye"sv) \
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CASE("他們爲什麽不說中文"sv, "ihqwctvzc91f659drss3x8bo0yb"sv) \
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CASE("Pročprostěnemluvíčesky"sv, "Proprostnemluvesky-uyb24dma41a"sv) \
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CASE("למההםפשוטלאמדבריםעברית"sv, "4dbcagdahymbxekheh6e0a7fei0b"sv) \
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CASE("यहलोगहिन्दीक्योंनहींबोलसकतेहैं"sv, "i1baa7eci9glrd9b2ae1bj0hfcgg6iyaf8o0a1dig0cd"sv) \
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CASE("なぜみんな日本語を話してくれないのか"sv, "n8jok5ay5dzabd5bym9f0cm5685rrjetr6pdxa"sv) \
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CASE("세계의모든사람들이한국어를이해한다면얼마나좋을까"sv, "989aomsvi5e83db1d2a355cv1e0vak1dwrv93d5xbh15a0dt30a5jpsd879ccm6fea98c"sv) \
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CASE("почемужеонинеговорятпорусски"sv, "b1abfaaepdrnnbgefbadotcwatmq2g4l"sv) \
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CASE("PorquénopuedensimplementehablarenEspañol"sv, "PorqunopuedensimplementehablarenEspaol-fmd56a"sv) \
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CASE("TạisaohọkhôngthểchỉnóitiếngViệt"sv, "TisaohkhngthchnitingVit-kjcr8268qyxafd2f1b9g"sv) \
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CASE("3年B組金八先生"sv, "3B-ww4c5e180e575a65lsy2b"sv) \
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CASE("安室奈美恵-with-SUPER-MONKEYS"sv, "-with-SUPER-MONKEYS-pc58ag80a8qai00g7n9n"sv) \
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CASE("Hello-Another-Way-それぞれの場所"sv, "Hello-Another-Way--fc4qua05auwb3674vfr0b"sv) \
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CASE("ひとつ屋根の下2"sv, "2-u9tlzr9756bt3uc0v"sv) \
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CASE("MajiでKoiする5秒前"sv, "MajiKoi5-783gue6qz075azm5e"sv) \
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CASE("パフィーdeルンバ"sv, "de-jg4avhby1noc0d"sv) \
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CASE("そのスピードで"sv, "d9juau41awczczp"sv) \
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CASE("-> $1.00 <-"sv, "-> $1.00 <--"sv)
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TEST_CASE(decode)
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{
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#define CASE(a, b) EXPECT_EQ(TRY_OR_FAIL(decode(b)), a);
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ENUMERATE_TEST_CASES
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#undef CASE
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EXPECT(decode("Well hello friends!"sv).is_error());
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EXPECT(decode("Nåväl hej vänner"sv).is_error());
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}
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TEST_CASE(encode)
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{
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#define CASE(a, b) EXPECT_EQ(TRY_OR_FAIL(encode(a)), b);
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ENUMERATE_TEST_CASES
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#undef CASE
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}
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}
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@ -6,7 +6,6 @@ set(SOURCES
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Emoji.cpp
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IDNA.cpp
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Normalize.cpp
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Punycode.cpp
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Segmentation.cpp
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String.cpp
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UnicodeUtils.cpp
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|
||||
@ -1,241 +1,62 @@
|
||||
/*
|
||||
* Copyright (c) 2023, Simon Wanner <simon@skyrising.xyz>
|
||||
* Copyright (c) 2024, Tim Flynn <trflynn89@serenityos.org>
|
||||
*
|
||||
* SPDX-License-Identifier: BSD-2-Clause
|
||||
*/
|
||||
|
||||
#include <AK/Error.h>
|
||||
#include <AK/String.h>
|
||||
#include <LibUnicode/CharacterTypes.h>
|
||||
#include <LibUnicode/IDNA.h>
|
||||
#include <LibUnicode/Normalize.h>
|
||||
#include <LibUnicode/Punycode.h>
|
||||
#define AK_DONT_REPLACE_STD
|
||||
|
||||
#if ENABLE_UNICODE_DATA
|
||||
# include <LibUnicode/IDNAData.h>
|
||||
# include <LibUnicode/UnicodeData.h>
|
||||
#endif
|
||||
#include <LibLocale/ICU.h>
|
||||
#include <LibUnicode/IDNA.h>
|
||||
|
||||
#include <unicode/idna.h>
|
||||
|
||||
namespace Unicode::IDNA {
|
||||
|
||||
Optional<Mapping> __attribute__((weak)) get_idna_mapping(u32) { return {}; }
|
||||
|
||||
struct ProcessingResult {
|
||||
Vector<String> result {};
|
||||
bool has_error { false };
|
||||
};
|
||||
|
||||
static MappingStatus translate_status(MappingStatus status, UseStd3AsciiRules use_std3_ascii_rules)
|
||||
{
|
||||
switch (status) {
|
||||
case MappingStatus::DisallowedStd3Valid:
|
||||
return use_std3_ascii_rules == UseStd3AsciiRules::Yes ? MappingStatus::Disallowed : MappingStatus::Valid;
|
||||
case MappingStatus::DisallowedStd3Mapped:
|
||||
return use_std3_ascii_rules == UseStd3AsciiRules::Yes ? MappingStatus::Disallowed : MappingStatus::Mapped;
|
||||
default:
|
||||
return status;
|
||||
}
|
||||
}
|
||||
|
||||
// https://www.unicode.org/reports/tr46/#Validity_Criteria
|
||||
static bool is_valid_label(String const& label, CheckHyphens check_hyphens, CheckBidi check_bidi, CheckJoiners check_joiners, UseStd3AsciiRules use_std3_ascii_rules, TransitionalProcessing transitional_processing)
|
||||
{
|
||||
// 1. The label must be in Unicode Normalization Form NFC.
|
||||
auto normalized = normalize(label, NormalizationForm::NFC);
|
||||
if (normalized != label)
|
||||
return false;
|
||||
|
||||
size_t position = 0;
|
||||
for (auto code_point : label.code_points()) {
|
||||
// 2. If CheckHyphens, the label must not contain a U+002D HYPHEN-MINUS character in both the third and fourth positions.
|
||||
if (check_hyphens == CheckHyphens::Yes && code_point == '-' && (position == 2 || position == 3))
|
||||
return false;
|
||||
|
||||
// 4. The label must not contain a U+002E ( . ) FULL STOP.
|
||||
if (code_point == '.')
|
||||
return false;
|
||||
|
||||
// 5. The label must not begin with a combining mark, that is: General_Category=Mark.
|
||||
static auto general_category_mark = general_category_from_string("Mark"sv);
|
||||
if (position == 0 && general_category_mark.has_value() && code_point_has_general_category(code_point, general_category_mark.value()))
|
||||
return false;
|
||||
|
||||
// 6. Each code point in the label must only have certain status values according to Section 5, IDNA Mapping Table:
|
||||
Optional<Mapping> mapping = get_idna_mapping(code_point);
|
||||
if (!mapping.has_value())
|
||||
return false;
|
||||
|
||||
auto status = translate_status(mapping->status, use_std3_ascii_rules);
|
||||
if (transitional_processing == TransitionalProcessing::Yes) {
|
||||
// 1. For Transitional Processing, each value must be valid.
|
||||
if (status != MappingStatus::Valid)
|
||||
return false;
|
||||
} else {
|
||||
// 2. For Nontransitional Processing, each value must be either valid or deviation.
|
||||
if (status != MappingStatus::Valid && status != MappingStatus::Deviation)
|
||||
return false;
|
||||
}
|
||||
position++;
|
||||
}
|
||||
|
||||
// 3. If CheckHyphens, the label must neither begin nor end with a U+002D HYPHEN-MINUS character.
|
||||
if (check_hyphens == CheckHyphens::Yes && (label.starts_with('-') || label.ends_with('-')))
|
||||
return false;
|
||||
|
||||
// FIXME: 7. If CheckJoiners, the label must satisify the ContextJ rules from Appendix A, in The Unicode Code Points and Internationalized Domain Names for Applications (IDNA) [IDNA2008].
|
||||
(void)check_joiners;
|
||||
|
||||
// FIXME: 8. If CheckBidi, and if the domain name is a Bidi domain name, then the label must satisfy all six of the numbered conditions in [IDNA2008] RFC 5893, Section 2.
|
||||
(void)check_bidi;
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
// https://www.unicode.org/reports/tr46/#Processing
|
||||
static ErrorOr<ProcessingResult> apply_main_processing_steps(Utf8View domain_name, ToAsciiOptions const& options)
|
||||
{
|
||||
bool has_error = false;
|
||||
StringBuilder mapped;
|
||||
// 1. Map. For each code point in the domain_name string, look up the status value in Section 5, IDNA Mapping Table, and take the following actions:
|
||||
for (u32 code_point : domain_name) {
|
||||
Optional<Mapping> mapping = get_idna_mapping(code_point);
|
||||
if (!mapping.has_value()) {
|
||||
has_error = true;
|
||||
continue;
|
||||
}
|
||||
switch (translate_status(mapping->status, options.use_std3_ascii_rules)) {
|
||||
// disallowed: Leave the code point unchanged in the string, and record that there was an error.
|
||||
case MappingStatus::Disallowed:
|
||||
TRY(mapped.try_append_code_point(code_point));
|
||||
has_error = true;
|
||||
break;
|
||||
// ignored: Remove the code point from the string. This is equivalent to mapping the code point to an empty string.
|
||||
case MappingStatus::Ignored:
|
||||
break;
|
||||
// mapped: Replace the code point in the string by the value for the mapping in Section 5, IDNA Mapping Table.
|
||||
case MappingStatus::Mapped:
|
||||
TRY(mapped.try_append(mapping->mapped_to));
|
||||
break;
|
||||
// deviation:
|
||||
case MappingStatus::Deviation:
|
||||
if (options.transitional_processing == TransitionalProcessing::Yes) {
|
||||
// If Transitional_Processing, replace the code point in the string by the value for the mapping in Section 5, IDNA Mapping Table .
|
||||
TRY(mapped.try_append(mapping->mapped_to));
|
||||
} else {
|
||||
TRY(mapped.try_append_code_point(code_point));
|
||||
}
|
||||
break;
|
||||
// valid: Leave the code point unchanged in the string.
|
||||
case MappingStatus::Valid:
|
||||
TRY(mapped.try_append_code_point(code_point));
|
||||
break;
|
||||
|
||||
default:
|
||||
VERIFY_NOT_REACHED();
|
||||
}
|
||||
}
|
||||
|
||||
// 2. Normalize. Normalize the domain_name string to Unicode Normalization Form C.
|
||||
auto normalized = normalize(mapped.string_view(), NormalizationForm::NFC);
|
||||
|
||||
// 3. Break. Break the string into labels at U+002E ( . ) FULL STOP.
|
||||
auto labels = TRY(normalized.split('.', SplitBehavior::KeepEmpty));
|
||||
|
||||
// 4. Convert/Validate. For each label in the domain_name string:
|
||||
for (auto& label : labels) {
|
||||
// If the label starts with “xn--”:
|
||||
if (label.starts_with_bytes("xn--"sv)) {
|
||||
// 1. Attempt to convert the rest of the label to Unicode according to Punycode [RFC3492]. If that conversion fails, record that there was an error, and continue with the next label.
|
||||
// Otherwise replace the original label in the string by the results of the conversion.
|
||||
auto punycode = Punycode::decode(label.bytes_as_string_view().substring_view(4));
|
||||
if (punycode.is_error()) {
|
||||
has_error = true;
|
||||
continue;
|
||||
}
|
||||
|
||||
label = punycode.release_value();
|
||||
|
||||
// 2. Verify that the label meets the validity criteria in Section 4.1, Validity Criteria for Nontransitional Processing.
|
||||
// If any of the validity criteria are not satisfied, record that there was an error.
|
||||
if (!is_valid_label(label, options.check_hyphens, options.check_bidi, options.check_joiners, options.use_std3_ascii_rules, TransitionalProcessing::No))
|
||||
has_error = true;
|
||||
}
|
||||
// If the label does not start with “xn--”:
|
||||
else {
|
||||
// Verify that the label meets the validity criteria in Section 4.1, Validity Criteria for the input Processing choice (Transitional or Nontransitional).
|
||||
// If any of the validity criteria are not satisfied, record that there was an error.
|
||||
if (!is_valid_label(label, options.check_hyphens, options.check_bidi, options.check_joiners, options.use_std3_ascii_rules, options.transitional_processing))
|
||||
has_error = true;
|
||||
}
|
||||
}
|
||||
|
||||
return ProcessingResult {
|
||||
.result = move(labels),
|
||||
.has_error = has_error,
|
||||
};
|
||||
}
|
||||
|
||||
// https://www.unicode.org/reports/tr46/#ToASCII
|
||||
ErrorOr<String> to_ascii(Utf8View domain_name, ToAsciiOptions const& options)
|
||||
{
|
||||
// 1. To the input domain_name, apply the Processing Steps in Section 4, Processing, using the input boolean flags Transitional_Processing, CheckHyphens, CheckBidi, CheckJoiners, and UseSTD3ASCIIRules. This may record an error.
|
||||
auto processed = TRY(apply_main_processing_steps(domain_name, options));
|
||||
bool has_error = processed.has_error;
|
||||
u32 icu_options = UIDNA_DEFAULT;
|
||||
|
||||
// 2. Break the result into labels at U+002E FULL STOP.
|
||||
auto labels = move(processed.result);
|
||||
if (options.check_bidi == CheckBidi::Yes)
|
||||
icu_options |= UIDNA_CHECK_BIDI;
|
||||
if (options.check_joiners == CheckJoiners::Yes)
|
||||
icu_options |= UIDNA_CHECK_CONTEXTJ;
|
||||
if (options.use_std3_ascii_rules == UseStd3AsciiRules::Yes)
|
||||
icu_options |= UIDNA_USE_STD3_RULES;
|
||||
if (options.transitional_processing == TransitionalProcessing::No)
|
||||
icu_options |= UIDNA_NONTRANSITIONAL_TO_ASCII | UIDNA_NONTRANSITIONAL_TO_UNICODE;
|
||||
|
||||
// 3. Convert each label with non-ASCII characters into Punycode [RFC3492], and prefix by “xn--”. This may record an error.
|
||||
for (auto& label : labels) {
|
||||
auto all_ascii = true;
|
||||
for (auto code_point : label.code_points()) {
|
||||
if (!is_ascii(code_point)) {
|
||||
all_ascii = false;
|
||||
break;
|
||||
}
|
||||
}
|
||||
UErrorCode status = U_ZERO_ERROR;
|
||||
|
||||
if (!all_ascii) {
|
||||
auto punycode = Punycode::encode(label);
|
||||
if (punycode.is_error()) {
|
||||
has_error = true;
|
||||
continue;
|
||||
}
|
||||
auto punycode_result = punycode.release_value();
|
||||
auto idna = adopt_own_if_nonnull(icu::IDNA::createUTS46Instance(icu_options, status));
|
||||
if (Locale::icu_failure(status))
|
||||
return Error::from_string_literal("Unable to create an IDNA instance");
|
||||
|
||||
StringBuilder builder;
|
||||
TRY(builder.try_append("xn--"sv));
|
||||
TRY(builder.try_append(punycode_result));
|
||||
label = TRY(builder.to_string());
|
||||
}
|
||||
StringBuilder builder { domain_name.as_string().length() };
|
||||
icu::StringByteSink sink { &builder };
|
||||
|
||||
icu::IDNAInfo info;
|
||||
idna->nameToASCII_UTF8(Locale::icu_string_piece(domain_name.as_string()), sink, info, status);
|
||||
|
||||
auto errors = info.getErrors();
|
||||
|
||||
if (options.check_hyphens == CheckHyphens::No) {
|
||||
errors &= ~UIDNA_ERROR_HYPHEN_3_4;
|
||||
errors &= ~UIDNA_ERROR_LEADING_HYPHEN;
|
||||
errors &= ~UIDNA_ERROR_TRAILING_HYPHEN;
|
||||
}
|
||||
if (options.verify_dns_length == VerifyDnsLength::No) {
|
||||
errors &= ~UIDNA_ERROR_EMPTY_LABEL;
|
||||
errors &= ~UIDNA_ERROR_LABEL_TOO_LONG;
|
||||
errors &= ~UIDNA_ERROR_DOMAIN_NAME_TOO_LONG;
|
||||
}
|
||||
|
||||
// 4. If the VerifyDnsLength flag is true, then verify DNS length restrictions. This may record an error. For more information, see [STD13] and [STD3].
|
||||
if (options.verify_dns_length == VerifyDnsLength::Yes) {
|
||||
// 1. The length of the domain name, excluding the root label and its dot, is from 1 to 253.
|
||||
size_t total_length = 0;
|
||||
auto* root_label = !labels.is_empty() && labels.last().is_empty() ? &labels.last() : nullptr;
|
||||
for (auto& label : labels) {
|
||||
// 2. The length of each label is from 1 to 63.
|
||||
auto length = label.bytes().size();
|
||||
if (label.is_empty() && &label != root_label)
|
||||
return Error::from_string_literal("Invalid empty label");
|
||||
if (length > 63)
|
||||
return Error::from_string_literal("Label too long");
|
||||
total_length += length;
|
||||
}
|
||||
if (Locale::icu_failure(status) || errors != 0)
|
||||
return Error::from_string_literal("Unable to convert domain to ASCII");
|
||||
|
||||
total_length += labels.size() - (root_label ? 2 : 1);
|
||||
if (total_length == 0 || total_length > 253)
|
||||
return Error::from_string_literal("Domain too long");
|
||||
}
|
||||
|
||||
// 5. If an error was recorded in steps 1-4, then the operation has failed and a failure value is returned. No DNS lookup should be done.
|
||||
if (has_error)
|
||||
return Error::from_string_literal("Invalid domain name");
|
||||
|
||||
// 6. Otherwise join the labels using U+002E FULL STOP as a separator, and return the result.
|
||||
return String::join('.', labels);
|
||||
return builder.to_string();
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
@ -1,38 +1,17 @@
|
||||
/*
|
||||
* Copyright (c) 2023, Simon Wanner <simon@skyrising.xyz>
|
||||
* Copyright (c) 2024, Tim Flynn <trflynn89@serenityos.org>
|
||||
*
|
||||
* SPDX-License-Identifier: BSD-2-Clause
|
||||
*/
|
||||
|
||||
#pragma once
|
||||
|
||||
#include <AK/Error.h>
|
||||
#include <AK/String.h>
|
||||
#include <AK/Utf32View.h>
|
||||
#include <AK/Utf8View.h>
|
||||
|
||||
namespace Unicode::IDNA {
|
||||
|
||||
enum class MappingStatus : u8 {
|
||||
Valid,
|
||||
Ignored,
|
||||
Mapped,
|
||||
Deviation,
|
||||
Disallowed,
|
||||
DisallowedStd3Valid,
|
||||
DisallowedStd3Mapped,
|
||||
};
|
||||
|
||||
enum class IDNA2008Status : u8 {
|
||||
NV8,
|
||||
XV8,
|
||||
};
|
||||
|
||||
struct Mapping {
|
||||
MappingStatus status;
|
||||
IDNA2008Status idna_2008_status;
|
||||
Utf32View mapped_to;
|
||||
};
|
||||
|
||||
enum class CheckHyphens {
|
||||
No,
|
||||
Yes,
|
||||
@ -73,6 +52,5 @@ struct ToAsciiOptions {
|
||||
};
|
||||
|
||||
ErrorOr<String> to_ascii(Utf8View domain_name, ToAsciiOptions const& = {});
|
||||
Optional<Mapping> get_idna_mapping(u32 code_point);
|
||||
|
||||
}
|
||||
|
||||
@ -1,286 +0,0 @@
|
||||
/*
|
||||
* Copyright (c) 2023, Simon Wanner <simon@skyrising.xyz>
|
||||
*
|
||||
* SPDX-License-Identifier: BSD-2-Clause
|
||||
*/
|
||||
|
||||
#include <AK/Utf32View.h>
|
||||
#include <AK/Utf8View.h>
|
||||
#include <LibUnicode/Punycode.h>
|
||||
|
||||
namespace Unicode::Punycode {
|
||||
|
||||
// https://www.rfc-editor.org/rfc/rfc3492.html#section-5
|
||||
static constexpr u32 BASE = 36;
|
||||
static constexpr u32 TMIN = 1;
|
||||
static constexpr u32 TMAX = 26;
|
||||
static constexpr u32 SKEW = 38;
|
||||
static constexpr u32 DAMP = 700;
|
||||
static constexpr u32 INITIAL_BIAS = 72;
|
||||
static constexpr u32 INITIAL_N = 0x80;
|
||||
static constexpr u32 DELIMITER = '-';
|
||||
|
||||
static Optional<u32> digit_value_of_code_point(u32 code_point)
|
||||
{
|
||||
if (code_point >= 'A' && code_point <= 'Z')
|
||||
return code_point - 'A';
|
||||
if (code_point >= 'a' && code_point <= 'z')
|
||||
return code_point - 'a';
|
||||
if (code_point >= '0' && code_point <= '9')
|
||||
return code_point - '0' + 26;
|
||||
return {};
|
||||
}
|
||||
|
||||
static u32 code_point_value_of_digit(u32 digit)
|
||||
{
|
||||
VERIFY(digit < 36);
|
||||
if (digit <= 25)
|
||||
return 'a' + digit;
|
||||
return '0' + digit - 26;
|
||||
}
|
||||
|
||||
// https://www.rfc-editor.org/rfc/rfc3492.html#section-6.1
|
||||
static u32 adapt(u32 delta, u32 num_points, bool first_time)
|
||||
{
|
||||
// if firsttime then let delta = delta div damp
|
||||
if (first_time)
|
||||
delta = delta / DAMP;
|
||||
// else let delta = delta div 2
|
||||
else
|
||||
delta = delta / 2;
|
||||
|
||||
// let delta = delta + (delta div numpoints)
|
||||
delta = delta + (delta / num_points);
|
||||
|
||||
// let k = 0
|
||||
u32 k = 0;
|
||||
|
||||
// while delta > ((base - tmin) * tmax) div 2 do begin
|
||||
while (delta > ((BASE - TMIN) * TMAX) / 2) {
|
||||
// let delta = delta div (base - tmin)
|
||||
delta = delta / (BASE - TMIN);
|
||||
|
||||
// let k = k + base
|
||||
k = k + BASE;
|
||||
}
|
||||
|
||||
// return k + (((base - tmin + 1) * delta) div (delta + skew))
|
||||
return k + (((BASE - TMIN + 1) * delta) / (delta + SKEW));
|
||||
}
|
||||
|
||||
// https://www.rfc-editor.org/rfc/rfc3492.html#section-6.2
|
||||
ErrorOr<String> decode(StringView input)
|
||||
{
|
||||
size_t consumed = 0;
|
||||
|
||||
// let n = initial_n
|
||||
Checked<size_t> n = INITIAL_N;
|
||||
|
||||
// let i = 0
|
||||
Checked<u32> i = 0;
|
||||
|
||||
// let bias = initial_bias
|
||||
u32 bias = INITIAL_BIAS;
|
||||
|
||||
// let output = an empty string indexed from 0
|
||||
Vector<u32> output;
|
||||
|
||||
// consume all code points before the last delimiter (if there is one)
|
||||
// and copy them to output, fail on any non-basic code point
|
||||
Optional<size_t> last_delimiter_index = input.find_last(DELIMITER);
|
||||
if (last_delimiter_index.has_value()) {
|
||||
for (; consumed < last_delimiter_index.value(); consumed++) {
|
||||
if (!is_ascii(input[consumed]))
|
||||
return Error::from_string_literal("Unexpected non-basic code point");
|
||||
TRY(output.try_append(input[consumed]));
|
||||
}
|
||||
|
||||
// if more than zero code points were consumed then consume one more
|
||||
// (which will be the last delimiter)
|
||||
if (last_delimiter_index.value() > 0) {
|
||||
auto next = input[consumed++];
|
||||
VERIFY(next == DELIMITER);
|
||||
}
|
||||
}
|
||||
|
||||
// while the input is not exhausted do begin
|
||||
while (consumed < input.length()) {
|
||||
// let oldi = i
|
||||
Checked<u32> old_i = i;
|
||||
|
||||
// let w = 1
|
||||
Checked<u32> w = 1;
|
||||
|
||||
// for k = base to infinity in steps of base do begin
|
||||
for (size_t k = BASE;; k += BASE) {
|
||||
// consume a code point, or fail if there was none to consume
|
||||
if (consumed >= input.length())
|
||||
return Error::from_string_literal("No more code points to consume");
|
||||
auto code_point = input[consumed++];
|
||||
|
||||
// let digit = the code point's digit-value, fail if it has none
|
||||
auto digit = digit_value_of_code_point(code_point);
|
||||
if (!digit.has_value())
|
||||
return Error::from_string_literal("Invalid base-36 digit");
|
||||
|
||||
// let i = i + digit * w, fail on overflow
|
||||
i = i + Checked(digit.value()) * w;
|
||||
if (i.has_overflow())
|
||||
return Error::from_string_literal("Numeric overflow");
|
||||
|
||||
// let t = tmin if k <= bias {+ tmin}, or
|
||||
// tmax if k >= bias + tmax, or k - bias otherwise
|
||||
u32 t = k <= bias ? TMIN : (k >= bias + TMAX ? TMAX : k - bias);
|
||||
|
||||
// if digit < t then break
|
||||
if (digit.value() < t)
|
||||
break;
|
||||
|
||||
// let w = w * (base - t), fail on overflow
|
||||
w = w * Checked(BASE - t);
|
||||
if (w.has_overflow())
|
||||
return Error::from_string_literal("Numeric overflow");
|
||||
}
|
||||
// let bias = adapt(i - oldi, length(output) + 1, test oldi is 0?)
|
||||
bias = adapt((i - old_i).value(), output.size() + 1, !old_i);
|
||||
|
||||
// let n = n + i div (length(output) + 1), fail on overflow
|
||||
n = n + Checked(static_cast<size_t>(i.value() / static_cast<u32>(output.size() + 1)));
|
||||
if (n.has_overflow())
|
||||
return Error::from_string_literal("Numeric overflow");
|
||||
|
||||
// let i = i mod (length(output) + 1)
|
||||
i = i % Checked(static_cast<u32>(output.size() + 1));
|
||||
|
||||
// {if n is a basic code point then fail}
|
||||
// NOTE: The full statement enclosed in braces (checking whether n is a basic code point) can be omitted if initial_n exceeds all basic code points
|
||||
// (which is true for Punycode), because n is never less than initial_n.
|
||||
VERIFY(!is_ascii(n.value()));
|
||||
|
||||
// insert n into output at position i
|
||||
TRY(output.try_insert(i.value(), n.value()));
|
||||
|
||||
// increment i
|
||||
i++;
|
||||
}
|
||||
|
||||
StringBuilder builder;
|
||||
TRY(builder.try_append(Utf32View(output.data(), output.size())));
|
||||
return builder.to_string();
|
||||
}
|
||||
|
||||
static Optional<u32> find_smallest_code_point_greater_than_or_equal(Utf32View code_points, u32 threshold)
|
||||
{
|
||||
Optional<u32> result;
|
||||
for (auto code_point : code_points) {
|
||||
if (code_point >= threshold && (!result.has_value() || code_point < result.value()))
|
||||
result = code_point;
|
||||
}
|
||||
return result;
|
||||
}
|
||||
|
||||
ErrorOr<String> encode(StringView input)
|
||||
{
|
||||
Vector<u32> code_points;
|
||||
for (auto code_point : Utf8View(input))
|
||||
TRY(code_points.try_append(code_point));
|
||||
return encode(Utf32View(code_points.data(), code_points.size()));
|
||||
}
|
||||
|
||||
// https://www.rfc-editor.org/rfc/rfc3492.html#section-6.3
|
||||
ErrorOr<String> encode(Utf32View input)
|
||||
{
|
||||
Vector<u32> output;
|
||||
|
||||
// let n = initial_n
|
||||
Checked<size_t> n = INITIAL_N;
|
||||
|
||||
// let delta = 0
|
||||
Checked<size_t> delta = 0;
|
||||
|
||||
// let bias = initial_bias
|
||||
u32 bias = INITIAL_BIAS;
|
||||
|
||||
// let h = b = the number of basic code points in the input
|
||||
// copy them to the output in order, followed by a delimiter if b > 0
|
||||
size_t b = 0;
|
||||
for (auto code_point : input) {
|
||||
if (is_ascii(code_point)) {
|
||||
TRY(output.try_append(code_point));
|
||||
b++;
|
||||
}
|
||||
}
|
||||
auto h = b;
|
||||
if (b > 0)
|
||||
TRY(output.try_append(DELIMITER));
|
||||
|
||||
// while h < length(input) do begin
|
||||
while (h < input.length()) {
|
||||
// let m = the minimum {non-basic} code point >= n in the input
|
||||
auto m = find_smallest_code_point_greater_than_or_equal(input, n.value());
|
||||
VERIFY(m.has_value());
|
||||
|
||||
// let delta = delta + (m - n) * (h + 1), fail on overflow
|
||||
delta = delta + (Checked(static_cast<size_t>(m.value())) - n) * Checked(h + 1);
|
||||
if (delta.has_overflow())
|
||||
return Error::from_string_literal("Numeric overflow");
|
||||
|
||||
// let n = m
|
||||
n = m.value();
|
||||
|
||||
// for each code point c in the input (in order) do begin
|
||||
for (auto c : input) {
|
||||
// if c < n {or c is basic} then increment delta, fail on overflow
|
||||
if (c < n.value()) {
|
||||
delta++;
|
||||
if (delta.has_overflow())
|
||||
return Error::from_string_literal("Numeric overflow");
|
||||
}
|
||||
|
||||
// if c == n then begin
|
||||
if (c == n.value()) {
|
||||
// let q = delta
|
||||
auto q = delta.value();
|
||||
|
||||
// for k = base to infinity in steps of base do begin
|
||||
for (size_t k = BASE;; k += BASE) {
|
||||
// let t = tmin if k <= bias {+ tmin}, or
|
||||
// tmax if k >= bias + tmax, or k - bias otherwise
|
||||
u32 t = k <= bias ? TMIN : (k >= bias + TMAX ? TMAX : k - bias);
|
||||
|
||||
// if q < t then break
|
||||
if (q < t)
|
||||
break;
|
||||
|
||||
// output the code point for digit t + ((q - t) mod (base - t))
|
||||
auto digit = t + ((q - t) % (BASE - t));
|
||||
TRY(output.try_append(code_point_value_of_digit(digit)));
|
||||
|
||||
// let q = (q - t) div (base - t)
|
||||
q = (q - t) / (BASE - t);
|
||||
}
|
||||
// output the code point for digit q
|
||||
TRY(output.try_append(code_point_value_of_digit(q)));
|
||||
|
||||
// let bias = adapt(delta, h + 1, test h equals b?)
|
||||
bias = adapt(delta.value(), h + 1, h == b);
|
||||
|
||||
// let delta = 0
|
||||
delta = 0;
|
||||
|
||||
// increment h
|
||||
h++;
|
||||
}
|
||||
}
|
||||
|
||||
// increment delta and n
|
||||
delta++;
|
||||
n++;
|
||||
}
|
||||
|
||||
StringBuilder builder;
|
||||
TRY(builder.try_append(Utf32View(output.data(), output.size())));
|
||||
return builder.to_string();
|
||||
}
|
||||
|
||||
}
|
||||
@ -1,17 +0,0 @@
|
||||
/*
|
||||
* Copyright (c) 2023, Simon Wanner <simon@skyrising.xyz>
|
||||
*
|
||||
* SPDX-License-Identifier: BSD-2-Clause
|
||||
*/
|
||||
|
||||
#pragma once
|
||||
|
||||
#include <AK/String.h>
|
||||
|
||||
namespace Unicode::Punycode {
|
||||
|
||||
ErrorOr<String> decode(StringView);
|
||||
ErrorOr<String> encode(StringView);
|
||||
ErrorOr<String> encode(Utf32View);
|
||||
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user