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afe9d5350e
scuffed-code/icu4c/source/i18n/uspoof.cpp
Andy Heninger afe9d5350e ICU-11262 Spoof check data refresh. 
X-SVN-Rev: 36553
2014-09-17 23:27:40 +00:00

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/*
***************************************************************************
* Copyright (C) 2008-2014, International Business Machines Corporation
* and others. All Rights Reserved.
***************************************************************************
* file name: uspoof.cpp
* encoding: US-ASCII
* tab size: 8 (not used)
* indentation:4
*
* created on: 2008Feb13
* created by: Andy Heninger
*
* Unicode Spoof Detection
*/
#include "unicode/utypes.h"
#include "unicode/normalizer2.h"
#include "unicode/uspoof.h"
#include "unicode/ustring.h"
#include "unicode/utf16.h"
#include "cmemory.h"
#include "cstring.h"
#include "identifier_info.h"
#include "mutex.h"
#include "scriptset.h"
#include "uassert.h"
#include "ucln_in.h"
#include "uspoof_impl.h"
#include "umutex.h"
#if !UCONFIG_NO_NORMALIZATION
U_NAMESPACE_USE
//
// Static Objects used by the spoof impl, their thread safe initialization and their cleanup.
//
static UnicodeSet *gInclusionSet = NULL;
static UnicodeSet *gRecommendedSet = NULL;
static const Normalizer2 *gNfdNormalizer = NULL;
static UInitOnce gSpoofInitOnce = U_INITONCE_INITIALIZER;
static UBool U_CALLCONV
uspoof_cleanup(void) {
delete gInclusionSet;
gInclusionSet = NULL;
delete gRecommendedSet;
gRecommendedSet = NULL;
gNfdNormalizer = NULL;
gSpoofInitOnce.reset();
return TRUE;
}
static void U_CALLCONV initializeStatics(UErrorCode &status) {
static const char *inclusionPat =
"[\\u0027\\u002D-\\u002E\\u003A\\u00B7\\u0375\\u058A\\u05F3-\\u05F4"
"\\u06FD-\\u06FE\\u0F0B\\u200C-\\u200D\\u2010\\u2019\\u2027\\u30A0\\u30FB]";
gInclusionSet = new UnicodeSet(UnicodeString(inclusionPat, -1, US_INV), status);
// Note: data from http://unicode.org/Public/security/latest/xidmodifications.txt version 7.0.0
// No tooling to generate this from the .txt file, hand extracted with editor macros.
// Ultimately, data will be available as character properties, eliminating this.
// Note: concatenated string constants do not work with UNICODE_STRING_SIMPLE on all platforms.
static const char *recommendedPat =
"[\\u0030-\\u0039\\u0041-\\u005A\\u005F\\u0061-\\u007A\\u00C0-\\u00D6\\u00D8-\\u00F6"
"\\u00F8-\\u0131\\u0134-\\u013E\\u0141-\\u0148\\u014A-\\u017E\\u01A0-\\u01A1"
"\\u01AF-\\u01B0\\u01CD-\\u01DC\\u01DE-\\u01E3\\u01E6-\\u01F0\\u01F4-\\u01F5"
"\\u01F8-\\u021B\\u021E-\\u021F\\u0226-\\u0233\\u0259\\u02BB-\\u02BC\\u02EC"
"\\u0300-\\u0304\\u0306-\\u030C\\u030F-\\u0311\\u0313-\\u0314\\u031B\\u0323-\\u0328"
"\\u032D-\\u032E\\u0330-\\u0331\\u0335\\u0338-\\u0339\\u0342\\u0345\\u037B-\\u037D"
"\\u0386\\u0388-\\u038A\\u038C\\u038E-\\u03A1\\u03A3-\\u03CE\\u03FC-\\u045F"
"\\u048A-\\u0529\\u052E-\\u052F\\u0531-\\u0556\\u0559\\u0561-\\u0586\\u05B4"
"\\u05D0-\\u05EA\\u05F0-\\u05F2\\u0620-\\u063F\\u0641-\\u0655\\u0660-\\u0669"
"\\u0670-\\u0672\\u0674\\u0679-\\u068D\\u068F-\\u06D3\\u06D5\\u06E5-\\u06E6"
"\\u06EE-\\u06FC\\u06FF\\u0750-\\u07B1\\u08A0-\\u08AC\\u08B2\\u0901-\\u094D"
"\\u094F-\\u0950\\u0956-\\u0957\\u0960-\\u0963\\u0966-\\u096F\\u0971-\\u0977"
"\\u0979-\\u097F\\u0981-\\u0983\\u0985-\\u098C\\u098F-\\u0990\\u0993-\\u09A8"
"\\u09AA-\\u09B0\\u09B2\\u09B6-\\u09B9\\u09BC-\\u09C4\\u09C7-\\u09C8\\u09CB-\\u09CE"
"\\u09D7\\u09E0-\\u09E3\\u09E6-\\u09F1\\u0A01-\\u0A03\\u0A05-\\u0A0A\\u0A0F-\\u0A10"
"\\u0A13-\\u0A28\\u0A2A-\\u0A30\\u0A32\\u0A35\\u0A38-\\u0A39\\u0A3C\\u0A3E-\\u0A42"
"\\u0A47-\\u0A48\\u0A4B-\\u0A4D\\u0A5C\\u0A66-\\u0A74\\u0A81-\\u0A83\\u0A85-\\u0A8D"
"\\u0A8F-\\u0A91\\u0A93-\\u0AA8\\u0AAA-\\u0AB0\\u0AB2-\\u0AB3\\u0AB5-\\u0AB9"
"\\u0ABC-\\u0AC5\\u0AC7-\\u0AC9\\u0ACB-\\u0ACD\\u0AD0\\u0AE0-\\u0AE3\\u0AE6-\\u0AEF"
"\\u0B01-\\u0B03\\u0B05-\\u0B0C\\u0B0F-\\u0B10\\u0B13-\\u0B28\\u0B2A-\\u0B30"
"\\u0B32-\\u0B33\\u0B35-\\u0B39\\u0B3C-\\u0B43\\u0B47-\\u0B48\\u0B4B-\\u0B4D"
"\\u0B56-\\u0B57\\u0B5F-\\u0B61\\u0B66-\\u0B6F\\u0B71\\u0B82-\\u0B83\\u0B85-\\u0B8A"
"\\u0B8E-\\u0B90\\u0B92-\\u0B95\\u0B99-\\u0B9A\\u0B9C\\u0B9E-\\u0B9F\\u0BA3-\\u0BA4"
"\\u0BA8-\\u0BAA\\u0BAE-\\u0BB9\\u0BBE-\\u0BC2\\u0BC6-\\u0BC8\\u0BCA-\\u0BCD"
"\\u0BD0\\u0BD7\\u0BE6-\\u0BEF\\u0C01-\\u0C03\\u0C05-\\u0C0C\\u0C0E-\\u0C10"
"\\u0C12-\\u0C28\\u0C2A-\\u0C33\\u0C35-\\u0C39\\u0C3D-\\u0C44\\u0C46-\\u0C48"
"\\u0C4A-\\u0C4D\\u0C55-\\u0C56\\u0C60-\\u0C61\\u0C66-\\u0C6F\\u0C82-\\u0C83"
"\\u0C85-\\u0C8C\\u0C8E-\\u0C90\\u0C92-\\u0CA8\\u0CAA-\\u0CB3\\u0CB5-\\u0CB9"
"\\u0CBC-\\u0CC4\\u0CC6-\\u0CC8\\u0CCA-\\u0CCD\\u0CD5-\\u0CD6\\u0CE0-\\u0CE3"
"\\u0CE6-\\u0CEF\\u0CF1-\\u0CF2\\u0D02-\\u0D03\\u0D05-\\u0D0C\\u0D0E-\\u0D10"
"\\u0D12-\\u0D3A\\u0D3D-\\u0D43\\u0D46-\\u0D48\\u0D4A-\\u0D4E\\u0D57\\u0D60-\\u0D61"
"\\u0D66-\\u0D6F\\u0D7A-\\u0D7F\\u0D82-\\u0D83\\u0D85-\\u0D8E\\u0D91-\\u0D96"
"\\u0D9A-\\u0DA5\\u0DA7-\\u0DB1\\u0DB3-\\u0DBB\\u0DBD\\u0DC0-\\u0DC6\\u0DCA"
"\\u0DCF-\\u0DD4\\u0DD6\\u0DD8-\\u0DDE\\u0DF2\\u0E01-\\u0E32\\u0E34-\\u0E3A"
"\\u0E40-\\u0E4E\\u0E50-\\u0E59\\u0E81-\\u0E82\\u0E84\\u0E87-\\u0E88\\u0E8A"
"\\u0E8D\\u0E94-\\u0E97\\u0E99-\\u0E9F\\u0EA1-\\u0EA3\\u0EA5\\u0EA7\\u0EAA-\\u0EAB"
"\\u0EAD-\\u0EB2\\u0EB4-\\u0EB9\\u0EBB-\\u0EBD\\u0EC0-\\u0EC4\\u0EC6\\u0EC8-\\u0ECD"
"\\u0ED0-\\u0ED9\\u0EDE-\\u0EDF\\u0F00\\u0F20-\\u0F29\\u0F35\\u0F37\\u0F3E-\\u0F42"
"\\u0F44-\\u0F47\\u0F49-\\u0F4C\\u0F4E-\\u0F51\\u0F53-\\u0F56\\u0F58-\\u0F5B"
"\\u0F5D-\\u0F68\\u0F6A-\\u0F6C\\u0F71-\\u0F72\\u0F74\\u0F7A-\\u0F80\\u0F82-\\u0F84"
"\\u0F86-\\u0F92\\u0F94-\\u0F97\\u0F99-\\u0F9C\\u0F9E-\\u0FA1\\u0FA3-\\u0FA6"
"\\u0FA8-\\u0FAB\\u0FAD-\\u0FB8\\u0FBA-\\u0FBC\\u0FC6\\u1000-\\u1049\\u1050-\\u109D"
"\\u10C7\\u10CD\\u10D0-\\u10F0\\u10F7-\\u10FA\\u10FD-\\u10FF\\u1200-\\u1248"
"\\u124A-\\u124D\\u1250-\\u1256\\u1258\\u125A-\\u125D\\u1260-\\u1288\\u128A-\\u128D"
"\\u1290-\\u12B0\\u12B2-\\u12B5\\u12B8-\\u12BE\\u12C0\\u12C2-\\u12C5\\u12C8-\\u12D6"
"\\u12D8-\\u1310\\u1312-\\u1315\\u1318-\\u135A\\u135D-\\u135F\\u1380-\\u138F"
"\\u1780-\\u17A2\\u17A5-\\u17A7\\u17A9-\\u17B3\\u17B6-\\u17CA\\u17D2\\u17D7"
"\\u17DC\\u17E0-\\u17E9\\u1E00-\\u1E99\\u1EBF\\u1F00-\\u1F15\\u1F18-\\u1F1D"
"\\u1F20-\\u1F45\\u1F48-\\u1F4D\\u1F50-\\u1F57\\u1F59\\u1F5B\\u1F5D\\u1F5F-\\u1F70"
"\\u1F72\\u1F74\\u1F76\\u1F78\\u1F7A\\u1F7C\\u1F80-\\u1FB4\\u1FB6-\\u1FBA"
"\\u1FBC\\u1FC2-\\u1FC4\\u1FC6-\\u1FC8\\u1FCA\\u1FCC\\u1FD0-\\u1FD2\\u1FD6-\\u1FDA"
"\\u1FE0-\\u1FE2\\u1FE4-\\u1FEA\\u1FEC\\u1FF2-\\u1FF4\\u1FF6-\\u1FF8\\u1FFA"
"\\u1FFC\\u2D27\\u2D2D\\u2D80-\\u2D96\\u2DA0-\\u2DA6\\u2DA8-\\u2DAE\\u2DB0-\\u2DB6"
"\\u2DB8-\\u2DBE\\u2DC0-\\u2DC6\\u2DC8-\\u2DCE\\u2DD0-\\u2DD6\\u2DD8-\\u2DDE"
"\\u3005-\\u3007\\u3041-\\u3096\\u3099-\\u309A\\u309D-\\u309E\\u30A1-\\u30FA"
"\\u30FC-\\u30FE\\u3105-\\u312D\\u31A0-\\u31BA\\u3400-\\u4DB5\\u4E00-\\u9FCC"
"\\uA660-\\uA661\\uA674-\\uA67B\\uA67F\\uA69F\\uA717-\\uA71F\\uA788\\uA78D-\\uA78E"
"\\uA790-\\uA793\\uA7A0-\\uA7AA\\uA7FA\\uA9E7-\\uA9FE\\uAA60-\\uAA76\\uAA7A-\\uAA7F"
"\\uAB01-\\uAB06\\uAB09-\\uAB0E\\uAB11-\\uAB16\\uAB20-\\uAB26\\uAB28-\\uAB2E"
"\\uAC00-\\uD7A3\\uFA0E-\\uFA0F\\uFA11\\uFA13-\\uFA14\\uFA1F\\uFA21\\uFA23-\\uFA24"
"\\uFA27-\\uFA29\\U0001B000-\\U0001B001\\U00020000-\\U0002A6D6\\U0002A700-\\U0002B734"
"\\U0002B740-\\U0002B81D]";
gRecommendedSet = new UnicodeSet(UnicodeString(recommendedPat, -1, US_INV), status);
gNfdNormalizer = Normalizer2::getNFDInstance(status);
ucln_i18n_registerCleanup(UCLN_I18N_SPOOF, uspoof_cleanup);
}
U_CAPI USpoofChecker * U_EXPORT2
uspoof_open(UErrorCode *status) {
if (U_FAILURE(*status)) {
return NULL;
}
umtx_initOnce(gSpoofInitOnce, &initializeStatics, *status);
SpoofImpl *si = new SpoofImpl(SpoofData::getDefault(*status), *status);
if (U_FAILURE(*status)) {
delete si;
si = NULL;
}
return reinterpret_cast<USpoofChecker *>(si);
}
U_CAPI USpoofChecker * U_EXPORT2
uspoof_openFromSerialized(const void *data, int32_t length, int32_t *pActualLength,
UErrorCode *status) {
if (U_FAILURE(*status)) {
return NULL;
}
umtx_initOnce(gSpoofInitOnce, &initializeStatics, *status);
SpoofData *sd = new SpoofData(data, length, *status);
SpoofImpl *si = new SpoofImpl(sd, *status);
if (U_FAILURE(*status)) {
delete sd;
delete si;
return NULL;
}
if (sd == NULL || si == NULL) {
*status = U_MEMORY_ALLOCATION_ERROR;
delete sd;
delete si;
return NULL;
}
if (pActualLength != NULL) {
*pActualLength = sd->fRawData->fLength;
}
return reinterpret_cast<USpoofChecker *>(si);
}
U_CAPI USpoofChecker * U_EXPORT2
uspoof_clone(const USpoofChecker *sc, UErrorCode *status) {
const SpoofImpl *src = SpoofImpl::validateThis(sc, *status);
if (src == NULL) {
return NULL;
}
SpoofImpl *result = new SpoofImpl(*src, *status); // copy constructor
if (U_FAILURE(*status)) {
delete result;
result = NULL;
}
return reinterpret_cast<USpoofChecker *>(result);
}
U_CAPI void U_EXPORT2
uspoof_close(USpoofChecker *sc) {
UErrorCode status = U_ZERO_ERROR;
SpoofImpl *This = SpoofImpl::validateThis(sc, status);
delete This;
}
U_CAPI void U_EXPORT2
uspoof_setChecks(USpoofChecker *sc, int32_t checks, UErrorCode *status) {
SpoofImpl *This = SpoofImpl::validateThis(sc, *status);
if (This == NULL) {
return;
}
// Verify that the requested checks are all ones (bits) that
// are acceptable, known values.
if (checks & ~(USPOOF_ALL_CHECKS | USPOOF_AUX_INFO)) {
*status = U_ILLEGAL_ARGUMENT_ERROR;
return;
}
This->fChecks = checks;
}
U_CAPI int32_t U_EXPORT2
uspoof_getChecks(const USpoofChecker *sc, UErrorCode *status) {
const SpoofImpl *This = SpoofImpl::validateThis(sc, *status);
if (This == NULL) {
return 0;
}
return This->fChecks;
}
U_CAPI void U_EXPORT2
uspoof_setRestrictionLevel(USpoofChecker *sc, URestrictionLevel restrictionLevel) {
UErrorCode status = U_ZERO_ERROR;
SpoofImpl *This = SpoofImpl::validateThis(sc, status);
if (This != NULL) {
This->fRestrictionLevel = restrictionLevel;
}
}
U_CAPI URestrictionLevel U_EXPORT2
uspoof_getRestrictionLevel(const USpoofChecker *sc) {
UErrorCode status = U_ZERO_ERROR;
const SpoofImpl *This = SpoofImpl::validateThis(sc, status);
if (This == NULL) {
return USPOOF_UNRESTRICTIVE;
}
return This->fRestrictionLevel;
}
U_CAPI void U_EXPORT2
uspoof_setAllowedLocales(USpoofChecker *sc, const char *localesList, UErrorCode *status) {
SpoofImpl *This = SpoofImpl::validateThis(sc, *status);
if (This == NULL) {
return;
}
This->setAllowedLocales(localesList, *status);
}
U_CAPI const char * U_EXPORT2
uspoof_getAllowedLocales(USpoofChecker *sc, UErrorCode *status) {
SpoofImpl *This = SpoofImpl::validateThis(sc, *status);
if (This == NULL) {
return NULL;
}
return This->getAllowedLocales(*status);
}
U_CAPI const USet * U_EXPORT2
uspoof_getAllowedChars(const USpoofChecker *sc, UErrorCode *status) {
const UnicodeSet *result = uspoof_getAllowedUnicodeSet(sc, status);
return result->toUSet();
}
U_CAPI const UnicodeSet * U_EXPORT2
uspoof_getAllowedUnicodeSet(const USpoofChecker *sc, UErrorCode *status) {
const SpoofImpl *This = SpoofImpl::validateThis(sc, *status);
if (This == NULL) {
return NULL;
}
return This->fAllowedCharsSet;
}
U_CAPI void U_EXPORT2
uspoof_setAllowedChars(USpoofChecker *sc, const USet *chars, UErrorCode *status) {
const UnicodeSet *set = UnicodeSet::fromUSet(chars);
uspoof_setAllowedUnicodeSet(sc, set, status);
}
U_CAPI void U_EXPORT2
uspoof_setAllowedUnicodeSet(USpoofChecker *sc, const UnicodeSet *chars, UErrorCode *status) {
SpoofImpl *This = SpoofImpl::validateThis(sc, *status);
if (This == NULL) {
return;
}
if (chars->isBogus()) {
*status = U_ILLEGAL_ARGUMENT_ERROR;
return;
}
UnicodeSet *clonedSet = static_cast<UnicodeSet *>(chars->clone());
if (clonedSet == NULL || clonedSet->isBogus()) {
*status = U_MEMORY_ALLOCATION_ERROR;
return;
}
clonedSet->freeze();
delete This->fAllowedCharsSet;
This->fAllowedCharsSet = clonedSet;
This->fChecks |= USPOOF_CHAR_LIMIT;
}
U_CAPI int32_t U_EXPORT2
uspoof_check(const USpoofChecker *sc,
const UChar *id, int32_t length,
int32_t *position,
UErrorCode *status) {
const SpoofImpl *This = SpoofImpl::validateThis(sc, *status);
if (This == NULL) {
return 0;
}
if (length < -1) {
*status = U_ILLEGAL_ARGUMENT_ERROR;
return 0;
}
UnicodeString idStr((length == -1), id, length); // Aliasing constructor.
int32_t result = uspoof_checkUnicodeString(sc, idStr, position, status);
return result;
}
U_CAPI int32_t U_EXPORT2
uspoof_checkUTF8(const USpoofChecker *sc,
const char *id, int32_t length,
int32_t *position,
UErrorCode *status) {
if (U_FAILURE(*status)) {
return 0;
}
UnicodeString idStr = UnicodeString::fromUTF8(StringPiece(id, length>=0 ? length : uprv_strlen(id)));
int32_t result = uspoof_checkUnicodeString(sc, idStr, position, status);
return result;
}
U_CAPI int32_t U_EXPORT2
uspoof_areConfusable(const USpoofChecker *sc,
const UChar *id1, int32_t length1,
const UChar *id2, int32_t length2,
UErrorCode *status) {
SpoofImpl::validateThis(sc, *status);
if (U_FAILURE(*status)) {
return 0;
}
if (length1 < -1 || length2 < -1) {
*status = U_ILLEGAL_ARGUMENT_ERROR;
return 0;
}
UnicodeString id1Str((length1==-1), id1, length1); // Aliasing constructor
UnicodeString id2Str((length2==-1), id2, length2); // Aliasing constructor
return uspoof_areConfusableUnicodeString(sc, id1Str, id2Str, status);
}
U_CAPI int32_t U_EXPORT2
uspoof_areConfusableUTF8(const USpoofChecker *sc,
const char *id1, int32_t length1,
const char *id2, int32_t length2,
UErrorCode *status) {
SpoofImpl::validateThis(sc, *status);
if (U_FAILURE(*status)) {
return 0;
}
if (length1 < -1 || length2 < -1) {
*status = U_ILLEGAL_ARGUMENT_ERROR;
return 0;
}
UnicodeString id1Str = UnicodeString::fromUTF8(StringPiece(id1, length1>=0? length1 : uprv_strlen(id1)));
UnicodeString id2Str = UnicodeString::fromUTF8(StringPiece(id2, length2>=0? length2 : uprv_strlen(id2)));
int32_t results = uspoof_areConfusableUnicodeString(sc, id1Str, id2Str, status);
return results;
}
U_CAPI int32_t U_EXPORT2
uspoof_areConfusableUnicodeString(const USpoofChecker *sc,
const icu::UnicodeString &id1,
const icu::UnicodeString &id2,
UErrorCode *status) {
const SpoofImpl *This = SpoofImpl::validateThis(sc, *status);
if (U_FAILURE(*status)) {
return 0;
}
//
// See section 4 of UAX 39 for the algorithm for checking whether two strings are confusable,
// and for definitions of the types (single, whole, mixed-script) of confusables.
// We only care about a few of the check flags. Ignore the others.
// If no tests relavant to this function have been specified, return an error.
// TODO: is this really the right thing to do? It's probably an error on the caller's part,
// but logically we would just return 0 (no error).
if ((This->fChecks & (USPOOF_SINGLE_SCRIPT_CONFUSABLE | USPOOF_MIXED_SCRIPT_CONFUSABLE |
USPOOF_WHOLE_SCRIPT_CONFUSABLE)) == 0) {
*status = U_INVALID_STATE_ERROR;
return 0;
}
int32_t flagsForSkeleton = This->fChecks & USPOOF_ANY_CASE;
int32_t result = 0;
IdentifierInfo *identifierInfo = This->getIdentifierInfo(*status);
if (U_FAILURE(*status)) {
return 0;
}
identifierInfo->setIdentifier(id1, *status);
int32_t id1ScriptCount = identifierInfo->getScriptCount();
int32_t id1FirstScript = identifierInfo->getScripts()->nextSetBit(0);
identifierInfo->setIdentifier(id2, *status);
int32_t id2ScriptCount = identifierInfo->getScriptCount();
int32_t id2FirstScript = identifierInfo->getScripts()->nextSetBit(0);
This->releaseIdentifierInfo(identifierInfo);
identifierInfo = NULL;
if (This->fChecks & USPOOF_SINGLE_SCRIPT_CONFUSABLE) {
UnicodeString id1Skeleton;
UnicodeString id2Skeleton;
if (id1ScriptCount <= 1 && id2ScriptCount <= 1 && id1FirstScript == id2FirstScript) {
flagsForSkeleton |= USPOOF_SINGLE_SCRIPT_CONFUSABLE;
uspoof_getSkeletonUnicodeString(sc, flagsForSkeleton, id1, id1Skeleton, status);
uspoof_getSkeletonUnicodeString(sc, flagsForSkeleton, id2, id2Skeleton, status);
if (id1Skeleton == id2Skeleton) {
result |= USPOOF_SINGLE_SCRIPT_CONFUSABLE;
}
}
}
if (result & USPOOF_SINGLE_SCRIPT_CONFUSABLE) {
// If the two inputs are single script confusable they cannot also be
// mixed or whole script confusable, according to the UAX39 definitions.
// So we can skip those tests.
return result;
}
// Two identifiers are whole script confusable if each is of a single script
// and they are mixed script confusable.
UBool possiblyWholeScriptConfusables =
id1ScriptCount <= 1 && id2ScriptCount <= 1 && (This->fChecks & USPOOF_WHOLE_SCRIPT_CONFUSABLE);
//
// Mixed Script Check
//
if ((This->fChecks & USPOOF_MIXED_SCRIPT_CONFUSABLE) || possiblyWholeScriptConfusables ) {
// For getSkeleton(), resetting the USPOOF_SINGLE_SCRIPT_CONFUSABLE flag will get us
// the mixed script table skeleton, which is what we want.
// The Any Case / Lower Case bit in the skelton flags was set at the top of the function.
UnicodeString id1Skeleton;
UnicodeString id2Skeleton;
flagsForSkeleton &= ~USPOOF_SINGLE_SCRIPT_CONFUSABLE;
uspoof_getSkeletonUnicodeString(sc, flagsForSkeleton, id1, id1Skeleton, status);
uspoof_getSkeletonUnicodeString(sc, flagsForSkeleton, id2, id2Skeleton, status);
if (id1Skeleton == id2Skeleton) {
result |= USPOOF_MIXED_SCRIPT_CONFUSABLE;
if (possiblyWholeScriptConfusables) {
result |= USPOOF_WHOLE_SCRIPT_CONFUSABLE;
}
}
}
return result;
}
U_CAPI int32_t U_EXPORT2
uspoof_checkUnicodeString(const USpoofChecker *sc,
const icu::UnicodeString &id,
int32_t *position,
UErrorCode *status) {
const SpoofImpl *This = SpoofImpl::validateThis(sc, *status);
if (This == NULL) {
return 0;
}
int32_t result = 0;
IdentifierInfo *identifierInfo = NULL;
if ((This->fChecks) & (USPOOF_RESTRICTION_LEVEL | USPOOF_MIXED_NUMBERS)) {
identifierInfo = This->getIdentifierInfo(*status);
if (U_FAILURE(*status)) {
goto cleanupAndReturn;
}
identifierInfo->setIdentifier(id, *status);
identifierInfo->setIdentifierProfile(*This->fAllowedCharsSet);
}
if ((This->fChecks) & USPOOF_RESTRICTION_LEVEL) {
URestrictionLevel idRestrictionLevel = identifierInfo->getRestrictionLevel(*status);
if (idRestrictionLevel > This->fRestrictionLevel) {
result |= USPOOF_RESTRICTION_LEVEL;
}
if (This->fChecks & USPOOF_AUX_INFO) {
result |= idRestrictionLevel;
}
}
if ((This->fChecks) & USPOOF_MIXED_NUMBERS) {
const UnicodeSet *numerics = identifierInfo->getNumerics();
if (numerics->size() > 1) {
result |= USPOOF_MIXED_NUMBERS;
}
// TODO: ICU4J returns the UnicodeSet of the numerics found in the identifier.
// We have no easy way to do the same in C.
// if (checkResult != null) {
// checkResult.numerics = numerics;
// }
}
if (This->fChecks & (USPOOF_CHAR_LIMIT)) {
int32_t i;
UChar32 c;
int32_t length = id.length();
for (i=0; i<length ;) {
c = id.char32At(i);
i += U16_LENGTH(c);
if (!This->fAllowedCharsSet->contains(c)) {
result |= USPOOF_CHAR_LIMIT;
break;
}
}
}
if (This->fChecks &
(USPOOF_WHOLE_SCRIPT_CONFUSABLE | USPOOF_MIXED_SCRIPT_CONFUSABLE | USPOOF_INVISIBLE)) {
// These are the checks that need to be done on NFD input
UnicodeString nfdText;
gNfdNormalizer->normalize(id, nfdText, *status);
int32_t nfdLength = nfdText.length();
if (This->fChecks & USPOOF_INVISIBLE) {
// scan for more than one occurence of the same non-spacing mark
// in a sequence of non-spacing marks.
int32_t i;
UChar32 c;
UChar32 firstNonspacingMark = 0;
UBool haveMultipleMarks = FALSE;
UnicodeSet marksSeenSoFar; // Set of combining marks in a single combining sequence.
for (i=0; i<nfdLength ;) {
c = nfdText.char32At(i);
i += U16_LENGTH(c);
if (u_charType(c) != U_NON_SPACING_MARK) {
firstNonspacingMark = 0;
if (haveMultipleMarks) {
marksSeenSoFar.clear();
haveMultipleMarks = FALSE;
}
continue;
}
if (firstNonspacingMark == 0) {
firstNonspacingMark = c;
continue;
}
if (!haveMultipleMarks) {
marksSeenSoFar.add(firstNonspacingMark);
haveMultipleMarks = TRUE;
}
if (marksSeenSoFar.contains(c)) {
// report the error, and stop scanning.
// No need to find more than the first failure.
result |= USPOOF_INVISIBLE;
break;
}
marksSeenSoFar.add(c);
}
}
if (This->fChecks & (USPOOF_WHOLE_SCRIPT_CONFUSABLE | USPOOF_MIXED_SCRIPT_CONFUSABLE)) {
// The basic test is the same for both whole and mixed script confusables.
// Compute the set of scripts that every input character has a confusable in.
// For this computation an input character is always considered to be
// confusable with itself in its own script.
//
// If the number of such scripts is two or more, and the input consisted of
// characters all from a single script, we have a whole script confusable.
// (The two scripts will be the original script and the one that is confusable)
//
// If the number of such scripts >= one, and the original input contained characters from
// more than one script, we have a mixed script confusable. (We can transform
// some of the characters, and end up with a visually similar string all in
// one script.)
if (identifierInfo == NULL) {
identifierInfo = This->getIdentifierInfo(*status);
if (U_FAILURE(*status)) {
goto cleanupAndReturn;
}
identifierInfo->setIdentifier(id, *status);
}
int32_t scriptCount = identifierInfo->getScriptCount();
ScriptSet scripts;
This->wholeScriptCheck(nfdText, &scripts, *status);
int32_t confusableScriptCount = scripts.countMembers();
//printf("confusableScriptCount = %d\n", confusableScriptCount);
if ((This->fChecks & USPOOF_WHOLE_SCRIPT_CONFUSABLE) &&
confusableScriptCount >= 2 &&
scriptCount == 1) {
result |= USPOOF_WHOLE_SCRIPT_CONFUSABLE;
}
if ((This->fChecks & USPOOF_MIXED_SCRIPT_CONFUSABLE) &&
confusableScriptCount >= 1 &&
scriptCount > 1) {
result |= USPOOF_MIXED_SCRIPT_CONFUSABLE;
}
}
}
cleanupAndReturn:
This->releaseIdentifierInfo(identifierInfo);
if (position != NULL) {
*position = 0;
}
return result;
}
U_CAPI int32_t U_EXPORT2
uspoof_getSkeleton(const USpoofChecker *sc,
uint32_t type,
const UChar *id, int32_t length,
UChar *dest, int32_t destCapacity,
UErrorCode *status) {
SpoofImpl::validateThis(sc, *status);
if (U_FAILURE(*status)) {
return 0;
}
if (length<-1 || destCapacity<0 || (destCapacity==0 && dest!=NULL)) {
*status = U_ILLEGAL_ARGUMENT_ERROR;
return 0;
}
UnicodeString idStr((length==-1), id, length); // Aliasing constructor
UnicodeString destStr;
uspoof_getSkeletonUnicodeString(sc, type, idStr, destStr, status);
destStr.extract(dest, destCapacity, *status);
return destStr.length();
}
U_I18N_API UnicodeString & U_EXPORT2
uspoof_getSkeletonUnicodeString(const USpoofChecker *sc,
uint32_t type,
const UnicodeString &id,
UnicodeString &dest,
UErrorCode *status) {
const SpoofImpl *This = SpoofImpl::validateThis(sc, *status);
if (U_FAILURE(*status)) {
return dest;
}
int32_t tableMask = 0;
switch (type) {
case 0:
tableMask = USPOOF_ML_TABLE_FLAG;
break;
case USPOOF_SINGLE_SCRIPT_CONFUSABLE:
tableMask = USPOOF_SL_TABLE_FLAG;
break;
case USPOOF_ANY_CASE:
tableMask = USPOOF_MA_TABLE_FLAG;
break;
case USPOOF_SINGLE_SCRIPT_CONFUSABLE | USPOOF_ANY_CASE:
tableMask = USPOOF_SA_TABLE_FLAG;
break;
default:
*status = U_ILLEGAL_ARGUMENT_ERROR;
return dest;
}
UnicodeString nfdId;
gNfdNormalizer->normalize(id, nfdId, *status);
// Apply the skeleton mapping to the NFD normalized input string
// Accumulate the skeleton, possibly unnormalized, in a UnicodeString.
int32_t inputIndex = 0;
UnicodeString skelStr;
int32_t normalizedLen = nfdId.length();
for (inputIndex=0; inputIndex < normalizedLen; ) {
UChar32 c = nfdId.char32At(inputIndex);
inputIndex += U16_LENGTH(c);
This->confusableLookup(c, tableMask, skelStr);
}
gNfdNormalizer->normalize(skelStr, dest, *status);
return dest;
}
U_CAPI int32_t U_EXPORT2
uspoof_getSkeletonUTF8(const USpoofChecker *sc,
uint32_t type,
const char *id, int32_t length,
char *dest, int32_t destCapacity,
UErrorCode *status) {
SpoofImpl::validateThis(sc, *status);
if (U_FAILURE(*status)) {
return 0;
}
if (length<-1 || destCapacity<0 || (destCapacity==0 && dest!=NULL)) {
*status = U_ILLEGAL_ARGUMENT_ERROR;
return 0;
}
UnicodeString srcStr = UnicodeString::fromUTF8(StringPiece(id, length>=0 ? length : uprv_strlen(id)));
UnicodeString destStr;
uspoof_getSkeletonUnicodeString(sc, type, srcStr, destStr, status);
if (U_FAILURE(*status)) {
return 0;
}
int32_t lengthInUTF8 = 0;
u_strToUTF8(dest, destCapacity, &lengthInUTF8,
destStr.getBuffer(), destStr.length(), status);
return lengthInUTF8;
}
U_CAPI int32_t U_EXPORT2
uspoof_serialize(USpoofChecker *sc,void *buf, int32_t capacity, UErrorCode *status) {
SpoofImpl *This = SpoofImpl::validateThis(sc, *status);
if (This == NULL) {
U_ASSERT(U_FAILURE(*status));
return 0;
}
int32_t dataSize = This->fSpoofData->fRawData->fLength;
if (capacity < dataSize) {
*status = U_BUFFER_OVERFLOW_ERROR;
return dataSize;
}
uprv_memcpy(buf, This->fSpoofData->fRawData, dataSize);
return dataSize;
}
U_CAPI const USet * U_EXPORT2
uspoof_getInclusionSet(UErrorCode *status) {
umtx_initOnce(gSpoofInitOnce, &initializeStatics, *status);
return gInclusionSet->toUSet();
}
U_CAPI const USet * U_EXPORT2
uspoof_getRecommendedSet(UErrorCode *status) {
umtx_initOnce(gSpoofInitOnce, &initializeStatics, *status);
return gRecommendedSet->toUSet();
}
U_I18N_API const UnicodeSet * U_EXPORT2
uspoof_getInclusionUnicodeSet(UErrorCode *status) {
umtx_initOnce(gSpoofInitOnce, &initializeStatics, *status);
return gInclusionSet;
}
U_I18N_API const UnicodeSet * U_EXPORT2
uspoof_getRecommendedUnicodeSet(UErrorCode *status) {
umtx_initOnce(gSpoofInitOnce, &initializeStatics, *status);
return gRecommendedSet;
}
#endif // !UCONFIG_NO_NORMALIZATION
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