960 lines
31 KiB
C++
960 lines
31 KiB
C++
// © 2016 and later: Unicode, Inc. and others.
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// License & terms of use: http://www.unicode.org/copyright.html
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/*
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**********************************************************************
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* Copyright (C) 2008-2016, International Business Machines
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* Corporation and others. All Rights Reserved.
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**********************************************************************
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*/
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#include "unicode/utypes.h"
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#include "unicode/uspoof.h"
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#include "unicode/uchar.h"
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#include "unicode/uniset.h"
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#include "unicode/utf16.h"
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#include "utrie2.h"
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#include "cmemory.h"
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#include "cstring.h"
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#include "scriptset.h"
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#include "umutex.h"
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#include "udataswp.h"
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#include "uassert.h"
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#include "ucln_in.h"
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#include "uspoof_impl.h"
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#if !UCONFIG_NO_NORMALIZATION
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U_NAMESPACE_BEGIN
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UOBJECT_DEFINE_RTTI_IMPLEMENTATION(SpoofImpl)
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SpoofImpl::SpoofImpl(SpoofData *data, UErrorCode& status) {
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construct(status);
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fSpoofData = data;
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}
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SpoofImpl::SpoofImpl(UErrorCode& status) {
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construct(status);
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// TODO: Call this method where it is actually needed, instead of in the
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// constructor, to allow for lazy data loading. See #12696.
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fSpoofData = SpoofData::getDefault(status);
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}
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SpoofImpl::SpoofImpl() {
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UErrorCode status = U_ZERO_ERROR;
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construct(status);
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// TODO: Call this method where it is actually needed, instead of in the
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// constructor, to allow for lazy data loading. See #12696.
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fSpoofData = SpoofData::getDefault(status);
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}
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void SpoofImpl::construct(UErrorCode& status) {
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fChecks = USPOOF_ALL_CHECKS;
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fSpoofData = nullptr;
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fAllowedCharsSet = nullptr;
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fAllowedLocales = nullptr;
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fRestrictionLevel = USPOOF_HIGHLY_RESTRICTIVE;
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if (U_FAILURE(status)) { return; }
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UnicodeSet *allowedCharsSet = new UnicodeSet(0, 0x10ffff);
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fAllowedCharsSet = allowedCharsSet;
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fAllowedLocales = uprv_strdup("");
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if (fAllowedCharsSet == nullptr || fAllowedLocales == nullptr) {
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status = U_MEMORY_ALLOCATION_ERROR;
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return;
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}
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allowedCharsSet->freeze();
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}
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// Copy Constructor, used by the user level clone() function.
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SpoofImpl::SpoofImpl(const SpoofImpl &src, UErrorCode &status) :
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fChecks(USPOOF_ALL_CHECKS), fSpoofData(nullptr), fAllowedCharsSet(nullptr) ,
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fAllowedLocales(nullptr) {
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if (U_FAILURE(status)) {
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return;
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}
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fChecks = src.fChecks;
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if (src.fSpoofData != nullptr) {
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fSpoofData = src.fSpoofData->addReference();
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}
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fAllowedCharsSet = src.fAllowedCharsSet->clone();
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fAllowedLocales = uprv_strdup(src.fAllowedLocales);
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if (fAllowedCharsSet == nullptr || fAllowedLocales == nullptr) {
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status = U_MEMORY_ALLOCATION_ERROR;
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}
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fRestrictionLevel = src.fRestrictionLevel;
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}
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SpoofImpl::~SpoofImpl() {
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if (fSpoofData != nullptr) {
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fSpoofData->removeReference(); // Will delete if refCount goes to zero.
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}
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delete fAllowedCharsSet;
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uprv_free((void *)fAllowedLocales);
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}
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// Cast this instance as a USpoofChecker for the C API.
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USpoofChecker *SpoofImpl::asUSpoofChecker() {
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return exportForC();
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}
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//
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// Incoming parameter check on Status and the SpoofChecker object
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// received from the C API.
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//
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const SpoofImpl *SpoofImpl::validateThis(const USpoofChecker *sc, UErrorCode &status) {
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auto* This = validate(sc, status);
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if (U_FAILURE(status)) {
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return nullptr;
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}
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if (This->fSpoofData != nullptr && !This->fSpoofData->validateDataVersion(status)) {
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return nullptr;
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}
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return This;
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}
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SpoofImpl *SpoofImpl::validateThis(USpoofChecker *sc, UErrorCode &status) {
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return const_cast<SpoofImpl *>
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(SpoofImpl::validateThis(const_cast<const USpoofChecker *>(sc), status));
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}
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void SpoofImpl::setAllowedLocales(const char *localesList, UErrorCode &status) {
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UnicodeSet allowedChars;
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UnicodeSet *tmpSet = nullptr;
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const char *locStart = localesList;
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const char *locEnd = nullptr;
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const char *localesListEnd = localesList + uprv_strlen(localesList);
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int32_t localeListCount = 0; // Number of locales provided by caller.
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// Loop runs once per locale from the localesList, a comma separated list of locales.
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do {
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locEnd = uprv_strchr(locStart, ',');
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if (locEnd == nullptr) {
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locEnd = localesListEnd;
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}
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while (*locStart == ' ') {
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locStart++;
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}
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const char *trimmedEnd = locEnd-1;
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while (trimmedEnd > locStart && *trimmedEnd == ' ') {
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trimmedEnd--;
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}
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if (trimmedEnd <= locStart) {
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break;
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}
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const char *locale = uprv_strndup(locStart, (int32_t)(trimmedEnd + 1 - locStart));
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localeListCount++;
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// We have one locale from the locales list.
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// Add the script chars for this locale to the accumulating set of allowed chars.
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// If the locale is no good, we will be notified back via status.
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addScriptChars(locale, &allowedChars, status);
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uprv_free((void *)locale);
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if (U_FAILURE(status)) {
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break;
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}
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locStart = locEnd + 1;
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} while (locStart < localesListEnd);
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// If our caller provided an empty list of locales, we disable the allowed characters checking
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if (localeListCount == 0) {
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uprv_free((void *)fAllowedLocales);
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fAllowedLocales = uprv_strdup("");
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tmpSet = new UnicodeSet(0, 0x10ffff);
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if (fAllowedLocales == nullptr || tmpSet == nullptr) {
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status = U_MEMORY_ALLOCATION_ERROR;
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return;
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}
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tmpSet->freeze();
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delete fAllowedCharsSet;
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fAllowedCharsSet = tmpSet;
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fChecks &= ~USPOOF_CHAR_LIMIT;
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return;
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}
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// Add all common and inherited characters to the set of allowed chars.
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UnicodeSet tempSet;
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tempSet.applyIntPropertyValue(UCHAR_SCRIPT, USCRIPT_COMMON, status);
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allowedChars.addAll(tempSet);
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tempSet.applyIntPropertyValue(UCHAR_SCRIPT, USCRIPT_INHERITED, status);
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allowedChars.addAll(tempSet);
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// If anything went wrong, we bail out without changing
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// the state of the spoof checker.
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if (U_FAILURE(status)) {
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return;
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}
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// Store the updated spoof checker state.
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tmpSet = allowedChars.clone();
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const char *tmpLocalesList = uprv_strdup(localesList);
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if (tmpSet == nullptr || tmpLocalesList == nullptr) {
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status = U_MEMORY_ALLOCATION_ERROR;
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return;
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}
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uprv_free((void *)fAllowedLocales);
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fAllowedLocales = tmpLocalesList;
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tmpSet->freeze();
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delete fAllowedCharsSet;
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fAllowedCharsSet = tmpSet;
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fChecks |= USPOOF_CHAR_LIMIT;
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}
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const char * SpoofImpl::getAllowedLocales(UErrorCode &/*status*/) {
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return fAllowedLocales;
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}
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// Given a locale (a language), add all the characters from all of the scripts used with that language
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// to the allowedChars UnicodeSet
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void SpoofImpl::addScriptChars(const char *locale, UnicodeSet *allowedChars, UErrorCode &status) {
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UScriptCode scripts[30];
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int32_t numScripts = uscript_getCode(locale, scripts, UPRV_LENGTHOF(scripts), &status);
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if (U_FAILURE(status)) {
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return;
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}
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if (status == U_USING_DEFAULT_WARNING) {
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status = U_ILLEGAL_ARGUMENT_ERROR;
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return;
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}
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UnicodeSet tmpSet;
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int32_t i;
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for (i=0; i<numScripts; i++) {
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tmpSet.applyIntPropertyValue(UCHAR_SCRIPT, scripts[i], status);
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allowedChars->addAll(tmpSet);
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}
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}
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// Computes the augmented script set for a code point, according to UTS 39 section 5.1.
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void SpoofImpl::getAugmentedScriptSet(UChar32 codePoint, ScriptSet& result, UErrorCode& status) {
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result.resetAll();
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result.setScriptExtensions(codePoint, status);
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if (U_FAILURE(status)) { return; }
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// Section 5.1 step 1
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if (result.test(USCRIPT_HAN, status)) {
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result.set(USCRIPT_HAN_WITH_BOPOMOFO, status);
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result.set(USCRIPT_JAPANESE, status);
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result.set(USCRIPT_KOREAN, status);
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}
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if (result.test(USCRIPT_HIRAGANA, status)) {
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result.set(USCRIPT_JAPANESE, status);
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}
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if (result.test(USCRIPT_KATAKANA, status)) {
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result.set(USCRIPT_JAPANESE, status);
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}
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if (result.test(USCRIPT_HANGUL, status)) {
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result.set(USCRIPT_KOREAN, status);
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}
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if (result.test(USCRIPT_BOPOMOFO, status)) {
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result.set(USCRIPT_HAN_WITH_BOPOMOFO, status);
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}
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// Section 5.1 step 2
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if (result.test(USCRIPT_COMMON, status) || result.test(USCRIPT_INHERITED, status)) {
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result.setAll();
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}
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}
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// Computes the resolved script set for a string, according to UTS 39 section 5.1.
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void SpoofImpl::getResolvedScriptSet(const UnicodeString& input, ScriptSet& result, UErrorCode& status) const {
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getResolvedScriptSetWithout(input, USCRIPT_CODE_LIMIT, result, status);
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}
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// Computes the resolved script set for a string, omitting characters having the specified script.
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// If USCRIPT_CODE_LIMIT is passed as the second argument, all characters are included.
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void SpoofImpl::getResolvedScriptSetWithout(const UnicodeString& input, UScriptCode script, ScriptSet& result, UErrorCode& status) const {
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result.setAll();
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ScriptSet temp;
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UChar32 codePoint;
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for (int32_t i = 0; i < input.length(); i += U16_LENGTH(codePoint)) {
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codePoint = input.char32At(i);
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// Compute the augmented script set for the character
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getAugmentedScriptSet(codePoint, temp, status);
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if (U_FAILURE(status)) { return; }
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// Intersect the augmented script set with the resolved script set, but only if the character doesn't
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// have the script specified in the function call
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if (script == USCRIPT_CODE_LIMIT || !temp.test(script, status)) {
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result.intersect(temp);
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}
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}
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}
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// Computes the set of numerics for a string, according to UTS 39 section 5.3.
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void SpoofImpl::getNumerics(const UnicodeString& input, UnicodeSet& result, UErrorCode& /*status*/) const {
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result.clear();
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UChar32 codePoint;
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for (int32_t i = 0; i < input.length(); i += U16_LENGTH(codePoint)) {
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codePoint = input.char32At(i);
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// Store a representative character for each kind of decimal digit
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if (u_charType(codePoint) == U_DECIMAL_DIGIT_NUMBER) {
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// Store the zero character as a representative for comparison.
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// Unicode guarantees it is codePoint - value
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result.add(codePoint - (UChar32)u_getNumericValue(codePoint));
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}
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}
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}
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// Computes the restriction level of a string, according to UTS 39 section 5.2.
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URestrictionLevel SpoofImpl::getRestrictionLevel(const UnicodeString& input, UErrorCode& status) const {
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// Section 5.2 step 1:
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if (!fAllowedCharsSet->containsAll(input)) {
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return USPOOF_UNRESTRICTIVE;
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}
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// Section 5.2 step 2
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// Java use a static UnicodeSet for this test. In C++, avoid the static variable
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// and just do a simple for loop.
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UBool allASCII = true;
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for (int32_t i=0, length=input.length(); i<length; i++) {
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if (input.charAt(i) > 0x7f) {
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allASCII = false;
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break;
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}
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}
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if (allASCII) {
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return USPOOF_ASCII;
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}
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// Section 5.2 steps 3:
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ScriptSet resolvedScriptSet;
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getResolvedScriptSet(input, resolvedScriptSet, status);
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if (U_FAILURE(status)) { return USPOOF_UNRESTRICTIVE; }
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// Section 5.2 step 4:
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if (!resolvedScriptSet.isEmpty()) {
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return USPOOF_SINGLE_SCRIPT_RESTRICTIVE;
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}
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// Section 5.2 step 5:
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ScriptSet resolvedNoLatn;
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getResolvedScriptSetWithout(input, USCRIPT_LATIN, resolvedNoLatn, status);
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if (U_FAILURE(status)) { return USPOOF_UNRESTRICTIVE; }
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// Section 5.2 step 6:
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if (resolvedNoLatn.test(USCRIPT_HAN_WITH_BOPOMOFO, status)
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|| resolvedNoLatn.test(USCRIPT_JAPANESE, status)
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|| resolvedNoLatn.test(USCRIPT_KOREAN, status)) {
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return USPOOF_HIGHLY_RESTRICTIVE;
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}
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// Section 5.2 step 7:
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if (!resolvedNoLatn.isEmpty()
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&& !resolvedNoLatn.test(USCRIPT_CYRILLIC, status)
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&& !resolvedNoLatn.test(USCRIPT_GREEK, status)
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&& !resolvedNoLatn.test(USCRIPT_CHEROKEE, status)) {
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return USPOOF_MODERATELY_RESTRICTIVE;
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}
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// Section 5.2 step 8:
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return USPOOF_MINIMALLY_RESTRICTIVE;
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}
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int32_t SpoofImpl::findHiddenOverlay(const UnicodeString& input, UErrorCode&) const {
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bool sawLeadCharacter = false;
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for (int32_t i=0; i<input.length();) {
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UChar32 cp = input.char32At(i);
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if (sawLeadCharacter && cp == 0x0307) {
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return i;
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}
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uint8_t combiningClass = u_getCombiningClass(cp);
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// Skip over characters except for those with combining class 0 (non-combining characters) or with
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// combining class 230 (same class as U+0307)
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U_ASSERT(u_getCombiningClass(0x0307) == 230);
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if (combiningClass == 0 || combiningClass == 230) {
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sawLeadCharacter = isIllegalCombiningDotLeadCharacter(cp);
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}
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i += U16_LENGTH(cp);
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}
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return -1;
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}
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static inline bool isIllegalCombiningDotLeadCharacterNoLookup(UChar32 cp) {
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return cp == u'i' || cp == u'j' || cp == u'ı' || cp == u'ȷ' || cp == u'l' ||
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u_hasBinaryProperty(cp, UCHAR_SOFT_DOTTED);
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}
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bool SpoofImpl::isIllegalCombiningDotLeadCharacter(UChar32 cp) const {
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if (isIllegalCombiningDotLeadCharacterNoLookup(cp)) {
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return true;
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}
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UnicodeString skelStr;
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fSpoofData->confusableLookup(cp, skelStr);
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UChar32 finalCp = skelStr.char32At(skelStr.moveIndex32(skelStr.length(), -1));
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if (finalCp != cp && isIllegalCombiningDotLeadCharacterNoLookup(finalCp)) {
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return true;
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}
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return false;
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}
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// Convert a text format hex number. Utility function used by builder code. Static.
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// Input: char16_t *string text. Output: a UChar32
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// Input has been pre-checked, and will have no non-hex chars.
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// The number must fall in the code point range of 0..0x10ffff
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// Static Function.
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UChar32 SpoofImpl::ScanHex(const char16_t *s, int32_t start, int32_t limit, UErrorCode &status) {
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if (U_FAILURE(status)) {
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return 0;
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}
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U_ASSERT(limit-start > 0);
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uint32_t val = 0;
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int i;
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for (i=start; i<limit; i++) {
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int digitVal = s[i] - 0x30;
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if (digitVal>9) {
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digitVal = 0xa + (s[i] - 0x41); // Upper Case 'A'
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}
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if (digitVal>15) {
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digitVal = 0xa + (s[i] - 0x61); // Lower Case 'a'
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}
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U_ASSERT(digitVal <= 0xf);
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val <<= 4;
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val += digitVal;
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}
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if (val > 0x10ffff) {
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status = U_PARSE_ERROR;
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val = 0;
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}
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return (UChar32)val;
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}
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//-----------------------------------------
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//
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// class CheckResult Implementation
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//
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//-----------------------------------------
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CheckResult::CheckResult() {
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clear();
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}
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USpoofCheckResult* CheckResult::asUSpoofCheckResult() {
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return exportForC();
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}
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//
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// Incoming parameter check on Status and the CheckResult object
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// received from the C API.
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//
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const CheckResult* CheckResult::validateThis(const USpoofCheckResult *ptr, UErrorCode &status) {
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return validate(ptr, status);
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}
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CheckResult* CheckResult::validateThis(USpoofCheckResult *ptr, UErrorCode &status) {
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return validate(ptr, status);
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}
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void CheckResult::clear() {
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fChecks = 0;
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fNumerics.clear();
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fRestrictionLevel = USPOOF_UNDEFINED_RESTRICTIVE;
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}
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int32_t CheckResult::toCombinedBitmask(int32_t enabledChecks) {
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if ((enabledChecks & USPOOF_AUX_INFO) != 0 && fRestrictionLevel != USPOOF_UNDEFINED_RESTRICTIVE) {
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return fChecks | fRestrictionLevel;
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} else {
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return fChecks;
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}
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}
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CheckResult::~CheckResult() {
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}
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//----------------------------------------------------------------------------------------------
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//
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// class SpoofData Implementation
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//
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//----------------------------------------------------------------------------------------------
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UBool SpoofData::validateDataVersion(UErrorCode &status) const {
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if (U_FAILURE(status) ||
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fRawData == nullptr ||
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fRawData->fMagic != USPOOF_MAGIC ||
|
||
fRawData->fFormatVersion[0] != USPOOF_CONFUSABLE_DATA_FORMAT_VERSION ||
|
||
fRawData->fFormatVersion[1] != 0 ||
|
||
fRawData->fFormatVersion[2] != 0 ||
|
||
fRawData->fFormatVersion[3] != 0) {
|
||
status = U_INVALID_FORMAT_ERROR;
|
||
return false;
|
||
}
|
||
return true;
|
||
}
|
||
|
||
static UBool U_CALLCONV
|
||
spoofDataIsAcceptable(void *context,
|
||
const char * /* type */, const char * /*name*/,
|
||
const UDataInfo *pInfo) {
|
||
if(
|
||
pInfo->size >= 20 &&
|
||
pInfo->isBigEndian == U_IS_BIG_ENDIAN &&
|
||
pInfo->charsetFamily == U_CHARSET_FAMILY &&
|
||
pInfo->dataFormat[0] == 0x43 && // dataFormat="Cfu "
|
||
pInfo->dataFormat[1] == 0x66 &&
|
||
pInfo->dataFormat[2] == 0x75 &&
|
||
pInfo->dataFormat[3] == 0x20 &&
|
||
pInfo->formatVersion[0] == USPOOF_CONFUSABLE_DATA_FORMAT_VERSION
|
||
) {
|
||
UVersionInfo *version = static_cast<UVersionInfo *>(context);
|
||
if(version != nullptr) {
|
||
uprv_memcpy(version, pInfo->dataVersion, 4);
|
||
}
|
||
return true;
|
||
} else {
|
||
return false;
|
||
}
|
||
}
|
||
|
||
// Methods for the loading of the default confusables data file. The confusable
|
||
// data is loaded only when it is needed.
|
||
//
|
||
// SpoofData::getDefault() - Return the default confusables data, and call the
|
||
// initOnce() if it is not available. Adds a reference
|
||
// to the SpoofData that the caller is responsible for
|
||
// decrementing when they are done with the data.
|
||
//
|
||
// uspoof_loadDefaultData - Called once, from initOnce(). The resulting SpoofData
|
||
// is shared by all spoof checkers using the default data.
|
||
//
|
||
// uspoof_cleanupDefaultData - Called during cleanup.
|
||
//
|
||
|
||
static UInitOnce gSpoofInitDefaultOnce {};
|
||
static SpoofData* gDefaultSpoofData;
|
||
|
||
static UBool U_CALLCONV
|
||
uspoof_cleanupDefaultData() {
|
||
if (gDefaultSpoofData) {
|
||
// Will delete, assuming all user-level spoof checkers were closed.
|
||
gDefaultSpoofData->removeReference();
|
||
gDefaultSpoofData = nullptr;
|
||
gSpoofInitDefaultOnce.reset();
|
||
}
|
||
return true;
|
||
}
|
||
|
||
static void U_CALLCONV uspoof_loadDefaultData(UErrorCode& status) {
|
||
UDataMemory *udm = udata_openChoice(nullptr, "cfu", "confusables",
|
||
spoofDataIsAcceptable,
|
||
nullptr, // context, would receive dataVersion if supplied.
|
||
&status);
|
||
if (U_FAILURE(status)) { return; }
|
||
gDefaultSpoofData = new SpoofData(udm, status);
|
||
if (U_FAILURE(status)) {
|
||
delete gDefaultSpoofData;
|
||
gDefaultSpoofData = nullptr;
|
||
return;
|
||
}
|
||
if (gDefaultSpoofData == nullptr) {
|
||
status = U_MEMORY_ALLOCATION_ERROR;
|
||
return;
|
||
}
|
||
ucln_i18n_registerCleanup(UCLN_I18N_SPOOFDATA, uspoof_cleanupDefaultData);
|
||
}
|
||
|
||
SpoofData* SpoofData::getDefault(UErrorCode& status) {
|
||
umtx_initOnce(gSpoofInitDefaultOnce, &uspoof_loadDefaultData, status);
|
||
if (U_FAILURE(status)) { return nullptr; }
|
||
gDefaultSpoofData->addReference();
|
||
return gDefaultSpoofData;
|
||
}
|
||
|
||
|
||
|
||
SpoofData::SpoofData(UDataMemory *udm, UErrorCode &status)
|
||
{
|
||
reset();
|
||
if (U_FAILURE(status)) {
|
||
return;
|
||
}
|
||
fUDM = udm;
|
||
// fRawData is non-const because it may be constructed by the data builder.
|
||
fRawData = reinterpret_cast<SpoofDataHeader *>(
|
||
const_cast<void *>(udata_getMemory(udm)));
|
||
validateDataVersion(status);
|
||
initPtrs(status);
|
||
}
|
||
|
||
|
||
SpoofData::SpoofData(const void *data, int32_t length, UErrorCode &status)
|
||
{
|
||
reset();
|
||
if (U_FAILURE(status)) {
|
||
return;
|
||
}
|
||
if ((size_t)length < sizeof(SpoofDataHeader)) {
|
||
status = U_INVALID_FORMAT_ERROR;
|
||
return;
|
||
}
|
||
if (data == nullptr) {
|
||
status = U_ILLEGAL_ARGUMENT_ERROR;
|
||
return;
|
||
}
|
||
void *ncData = const_cast<void *>(data);
|
||
fRawData = static_cast<SpoofDataHeader *>(ncData);
|
||
if (length < fRawData->fLength) {
|
||
status = U_INVALID_FORMAT_ERROR;
|
||
return;
|
||
}
|
||
validateDataVersion(status);
|
||
initPtrs(status);
|
||
}
|
||
|
||
|
||
// Spoof Data constructor for use from data builder.
|
||
// Initializes a new, empty data area that will be populated later.
|
||
SpoofData::SpoofData(UErrorCode &status) {
|
||
reset();
|
||
if (U_FAILURE(status)) {
|
||
return;
|
||
}
|
||
fDataOwned = true;
|
||
|
||
// The spoof header should already be sized to be a multiple of 16 bytes.
|
||
// Just in case it's not, round it up.
|
||
uint32_t initialSize = (sizeof(SpoofDataHeader) + 15) & ~15;
|
||
U_ASSERT(initialSize == sizeof(SpoofDataHeader));
|
||
|
||
fRawData = static_cast<SpoofDataHeader *>(uprv_malloc(initialSize));
|
||
fMemLimit = initialSize;
|
||
if (fRawData == nullptr) {
|
||
status = U_MEMORY_ALLOCATION_ERROR;
|
||
return;
|
||
}
|
||
uprv_memset(fRawData, 0, initialSize);
|
||
|
||
fRawData->fMagic = USPOOF_MAGIC;
|
||
fRawData->fFormatVersion[0] = USPOOF_CONFUSABLE_DATA_FORMAT_VERSION;
|
||
fRawData->fFormatVersion[1] = 0;
|
||
fRawData->fFormatVersion[2] = 0;
|
||
fRawData->fFormatVersion[3] = 0;
|
||
initPtrs(status);
|
||
}
|
||
|
||
// reset() - initialize all fields.
|
||
// Should be updated if any new fields are added.
|
||
// Called by constructors to put things in a known initial state.
|
||
void SpoofData::reset() {
|
||
fRawData = nullptr;
|
||
fDataOwned = false;
|
||
fUDM = nullptr;
|
||
fMemLimit = 0;
|
||
fRefCount = 1;
|
||
fCFUKeys = nullptr;
|
||
fCFUValues = nullptr;
|
||
fCFUStrings = nullptr;
|
||
}
|
||
|
||
|
||
// SpoofData::initPtrs()
|
||
// Initialize the pointers to the various sections of the raw data.
|
||
//
|
||
// This function is used both during the Trie building process (multiple
|
||
// times, as the individual data sections are added), and
|
||
// during the opening of a Spoof Checker from prebuilt data.
|
||
//
|
||
// The pointers for non-existent data sections (identified by an offset of 0)
|
||
// are set to nullptr.
|
||
//
|
||
// Note: During building the data, adding each new data section
|
||
// reallocs the raw data area, which likely relocates it, which
|
||
// in turn requires reinitializing all of the pointers into it, hence
|
||
// multiple calls to this function during building.
|
||
//
|
||
void SpoofData::initPtrs(UErrorCode &status) {
|
||
fCFUKeys = nullptr;
|
||
fCFUValues = nullptr;
|
||
fCFUStrings = nullptr;
|
||
if (U_FAILURE(status)) {
|
||
return;
|
||
}
|
||
if (fRawData->fCFUKeys != 0) {
|
||
fCFUKeys = (int32_t *)((char *)fRawData + fRawData->fCFUKeys);
|
||
}
|
||
if (fRawData->fCFUStringIndex != 0) {
|
||
fCFUValues = (uint16_t *)((char *)fRawData + fRawData->fCFUStringIndex);
|
||
}
|
||
if (fRawData->fCFUStringTable != 0) {
|
||
fCFUStrings = (char16_t *)((char *)fRawData + fRawData->fCFUStringTable);
|
||
}
|
||
}
|
||
|
||
|
||
SpoofData::~SpoofData() {
|
||
if (fDataOwned) {
|
||
uprv_free(fRawData);
|
||
}
|
||
fRawData = nullptr;
|
||
if (fUDM != nullptr) {
|
||
udata_close(fUDM);
|
||
}
|
||
fUDM = nullptr;
|
||
}
|
||
|
||
|
||
void SpoofData::removeReference() {
|
||
if (umtx_atomic_dec(&fRefCount) == 0) {
|
||
delete this;
|
||
}
|
||
}
|
||
|
||
|
||
SpoofData *SpoofData::addReference() {
|
||
umtx_atomic_inc(&fRefCount);
|
||
return this;
|
||
}
|
||
|
||
|
||
void *SpoofData::reserveSpace(int32_t numBytes, UErrorCode &status) {
|
||
if (U_FAILURE(status)) {
|
||
return nullptr;
|
||
}
|
||
if (!fDataOwned) {
|
||
UPRV_UNREACHABLE_EXIT;
|
||
}
|
||
|
||
numBytes = (numBytes + 15) & ~15; // Round up to a multiple of 16
|
||
uint32_t returnOffset = fMemLimit;
|
||
fMemLimit += numBytes;
|
||
fRawData = static_cast<SpoofDataHeader *>(uprv_realloc(fRawData, fMemLimit));
|
||
fRawData->fLength = fMemLimit;
|
||
uprv_memset((char *)fRawData + returnOffset, 0, numBytes);
|
||
initPtrs(status);
|
||
return (char *)fRawData + returnOffset;
|
||
}
|
||
|
||
int32_t SpoofData::serialize(void *buf, int32_t capacity, UErrorCode &status) const {
|
||
int32_t dataSize = fRawData->fLength;
|
||
if (capacity < dataSize) {
|
||
status = U_BUFFER_OVERFLOW_ERROR;
|
||
return dataSize;
|
||
}
|
||
uprv_memcpy(buf, fRawData, dataSize);
|
||
return dataSize;
|
||
}
|
||
|
||
int32_t SpoofData::size() const {
|
||
return fRawData->fLength;
|
||
}
|
||
|
||
//-------------------------------
|
||
//
|
||
// Front-end APIs for SpoofData
|
||
//
|
||
//-------------------------------
|
||
|
||
int32_t SpoofData::confusableLookup(UChar32 inChar, UnicodeString &dest) const {
|
||
// Perform a binary search.
|
||
// [lo, hi), i.e lo is inclusive, hi is exclusive.
|
||
// The result after the loop will be in lo.
|
||
int32_t lo = 0;
|
||
int32_t hi = length();
|
||
do {
|
||
int32_t mid = (lo + hi) / 2;
|
||
if (codePointAt(mid) > inChar) {
|
||
hi = mid;
|
||
} else if (codePointAt(mid) < inChar) {
|
||
lo = mid;
|
||
} else {
|
||
// Found result. Break early.
|
||
lo = mid;
|
||
break;
|
||
}
|
||
} while (hi - lo > 1);
|
||
|
||
// Did we find an entry? If not, the char maps to itself.
|
||
if (codePointAt(lo) != inChar) {
|
||
dest.append(inChar);
|
||
return 1;
|
||
}
|
||
|
||
// Add the element to the string builder and return.
|
||
return appendValueTo(lo, dest);
|
||
}
|
||
|
||
int32_t SpoofData::length() const {
|
||
return fRawData->fCFUKeysSize;
|
||
}
|
||
|
||
UChar32 SpoofData::codePointAt(int32_t index) const {
|
||
return ConfusableDataUtils::keyToCodePoint(fCFUKeys[index]);
|
||
}
|
||
|
||
int32_t SpoofData::appendValueTo(int32_t index, UnicodeString& dest) const {
|
||
int32_t stringLength = ConfusableDataUtils::keyToLength(fCFUKeys[index]);
|
||
|
||
// Value is either a char (for strings of length 1) or
|
||
// an index into the string table (for longer strings)
|
||
uint16_t value = fCFUValues[index];
|
||
if (stringLength == 1) {
|
||
dest.append((char16_t)value);
|
||
} else {
|
||
dest.append(fCFUStrings + value, stringLength);
|
||
}
|
||
|
||
return stringLength;
|
||
}
|
||
|
||
|
||
U_NAMESPACE_END
|
||
|
||
U_NAMESPACE_USE
|
||
|
||
//-----------------------------------------------------------------------------
|
||
//
|
||
// uspoof_swap - byte swap and char encoding swap of spoof data
|
||
//
|
||
//-----------------------------------------------------------------------------
|
||
U_CAPI int32_t U_EXPORT2
|
||
uspoof_swap(const UDataSwapper *ds, const void *inData, int32_t length, void *outData,
|
||
UErrorCode *status) {
|
||
|
||
if (status == nullptr || U_FAILURE(*status)) {
|
||
return 0;
|
||
}
|
||
if(ds==nullptr || inData==nullptr || length<-1 || (length>0 && outData==nullptr)) {
|
||
*status=U_ILLEGAL_ARGUMENT_ERROR;
|
||
return 0;
|
||
}
|
||
|
||
//
|
||
// Check that the data header is for spoof data.
|
||
// (Header contents are defined in gencfu.cpp)
|
||
//
|
||
const UDataInfo *pInfo = (const UDataInfo *)((const char *)inData+4);
|
||
if(!( pInfo->dataFormat[0]==0x43 && /* dataFormat="Cfu " */
|
||
pInfo->dataFormat[1]==0x66 &&
|
||
pInfo->dataFormat[2]==0x75 &&
|
||
pInfo->dataFormat[3]==0x20 &&
|
||
pInfo->formatVersion[0]==USPOOF_CONFUSABLE_DATA_FORMAT_VERSION &&
|
||
pInfo->formatVersion[1]==0 &&
|
||
pInfo->formatVersion[2]==0 &&
|
||
pInfo->formatVersion[3]==0 )) {
|
||
udata_printError(ds, "uspoof_swap(): data format %02x.%02x.%02x.%02x "
|
||
"(format version %02x %02x %02x %02x) is not recognized\n",
|
||
pInfo->dataFormat[0], pInfo->dataFormat[1],
|
||
pInfo->dataFormat[2], pInfo->dataFormat[3],
|
||
pInfo->formatVersion[0], pInfo->formatVersion[1],
|
||
pInfo->formatVersion[2], pInfo->formatVersion[3]);
|
||
*status=U_UNSUPPORTED_ERROR;
|
||
return 0;
|
||
}
|
||
|
||
//
|
||
// Swap the data header. (This is the generic ICU Data Header, not the uspoof Specific
|
||
// header). This swap also conveniently gets us
|
||
// the size of the ICU d.h., which lets us locate the start
|
||
// of the uspoof specific data.
|
||
//
|
||
int32_t headerSize=udata_swapDataHeader(ds, inData, length, outData, status);
|
||
|
||
|
||
//
|
||
// Get the Spoof Data Header, and check that it appears to be OK.
|
||
//
|
||
//
|
||
const uint8_t *inBytes =(const uint8_t *)inData+headerSize;
|
||
SpoofDataHeader *spoofDH = (SpoofDataHeader *)inBytes;
|
||
if (ds->readUInt32(spoofDH->fMagic) != USPOOF_MAGIC ||
|
||
ds->readUInt32(spoofDH->fLength) < sizeof(SpoofDataHeader))
|
||
{
|
||
udata_printError(ds, "uspoof_swap(): Spoof Data header is invalid.\n");
|
||
*status=U_UNSUPPORTED_ERROR;
|
||
return 0;
|
||
}
|
||
|
||
//
|
||
// Prefight operation? Just return the size
|
||
//
|
||
int32_t spoofDataLength = ds->readUInt32(spoofDH->fLength);
|
||
int32_t totalSize = headerSize + spoofDataLength;
|
||
if (length < 0) {
|
||
return totalSize;
|
||
}
|
||
|
||
//
|
||
// Check that length passed in is consistent with length from Spoof data header.
|
||
//
|
||
if (length < totalSize) {
|
||
udata_printError(ds, "uspoof_swap(): too few bytes (%d after ICU Data header) for spoof data.\n",
|
||
spoofDataLength);
|
||
*status=U_INDEX_OUTOFBOUNDS_ERROR;
|
||
return 0;
|
||
}
|
||
|
||
|
||
//
|
||
// Swap the Data. Do the data itself first, then the Spoof Data Header, because
|
||
// we need to reference the header to locate the data, and an
|
||
// inplace swap of the header leaves it unusable.
|
||
//
|
||
uint8_t *outBytes = (uint8_t *)outData + headerSize;
|
||
SpoofDataHeader *outputDH = (SpoofDataHeader *)outBytes;
|
||
|
||
int32_t sectionStart;
|
||
int32_t sectionLength;
|
||
|
||
//
|
||
// If not swapping in place, zero out the output buffer before starting.
|
||
// Gaps may exist between the individual sections, and these must be zeroed in
|
||
// the output buffer. The simplest way to do that is to just zero the whole thing.
|
||
//
|
||
if (inBytes != outBytes) {
|
||
uprv_memset(outBytes, 0, spoofDataLength);
|
||
}
|
||
|
||
// Confusables Keys Section (fCFUKeys)
|
||
sectionStart = ds->readUInt32(spoofDH->fCFUKeys);
|
||
sectionLength = ds->readUInt32(spoofDH->fCFUKeysSize) * 4;
|
||
ds->swapArray32(ds, inBytes+sectionStart, sectionLength, outBytes+sectionStart, status);
|
||
|
||
// String Index Section
|
||
sectionStart = ds->readUInt32(spoofDH->fCFUStringIndex);
|
||
sectionLength = ds->readUInt32(spoofDH->fCFUStringIndexSize) * 2;
|
||
ds->swapArray16(ds, inBytes+sectionStart, sectionLength, outBytes+sectionStart, status);
|
||
|
||
// String Table Section
|
||
sectionStart = ds->readUInt32(spoofDH->fCFUStringTable);
|
||
sectionLength = ds->readUInt32(spoofDH->fCFUStringTableLen) * 2;
|
||
ds->swapArray16(ds, inBytes+sectionStart, sectionLength, outBytes+sectionStart, status);
|
||
|
||
// And, last, swap the header itself.
|
||
// int32_t fMagic // swap this
|
||
// uint8_t fFormatVersion[4] // Do not swap this, just copy
|
||
// int32_t fLength and all the rest // Swap the rest, all is 32 bit stuff.
|
||
//
|
||
uint32_t magic = ds->readUInt32(spoofDH->fMagic);
|
||
ds->writeUInt32((uint32_t *)&outputDH->fMagic, magic);
|
||
|
||
if (inBytes != outBytes) {
|
||
uprv_memcpy(outputDH->fFormatVersion, spoofDH->fFormatVersion, sizeof(spoofDH->fFormatVersion));
|
||
}
|
||
// swap starting at fLength
|
||
ds->swapArray32(ds, &spoofDH->fLength, sizeof(SpoofDataHeader)-8 /* minus magic and fFormatVersion[4] */, &outputDH->fLength, status);
|
||
|
||
return totalSize;
|
||
}
|
||
|
||
#endif
|
||
|
||
|