1 /* 2 *************************************************************************** 3 * Copyright (C) 2008-2014, International Business Machines Corporation 4 * and others. All Rights Reserved. 5 *************************************************************************** 6 * file name: uspoof.cpp 7 * encoding: US-ASCII 8 * tab size: 8 (not used) 9 * indentation:4 10 * 11 * created on: 2008Feb13 12 * created by: Andy Heninger 13 * 14 * Unicode Spoof Detection 15 */ 16 #include "unicode/utypes.h" 17 #include "unicode/normalizer2.h" 18 #include "unicode/uspoof.h" 19 #include "unicode/ustring.h" 20 #include "unicode/utf16.h" 21 #include "cmemory.h" 22 #include "cstring.h" 23 #include "identifier_info.h" 24 #include "mutex.h" 25 #include "scriptset.h" 26 #include "uassert.h" 27 #include "ucln_in.h" 28 #include "uspoof_impl.h" 29 #include "umutex.h" 30 31 32 #if !UCONFIG_NO_NORMALIZATION 33 34 U_NAMESPACE_USE 35 36 37 // 38 // Static Objects used by the spoof impl, their thread safe initialization and their cleanup. 39 // 40 static UnicodeSet *gInclusionSet = NULL; 41 static UnicodeSet *gRecommendedSet = NULL; 42 static const Normalizer2 *gNfdNormalizer = NULL; 43 static UInitOnce gSpoofInitOnce = U_INITONCE_INITIALIZER; 44 45 static UBool U_CALLCONV 46 uspoof_cleanup(void) { 47 delete gInclusionSet; 48 gInclusionSet = NULL; 49 delete gRecommendedSet; 50 gRecommendedSet = NULL; 51 gNfdNormalizer = NULL; 52 gSpoofInitOnce.reset(); 53 return TRUE; 54 } 55 56 static void U_CALLCONV initializeStatics(UErrorCode &status) { 57 static const char *inclusionPat = 58 "[\\u0027\\u002d-\\u002e\\u003A\\u00B7\\u0375\\u058A\\u05F3-\\u05F4" 59 "\\u06FD-\\u06FE\\u0F0B\\u200C-\\u200D\\u2010\\u2019\\u2027\\u30A0\\u30FB]"; 60 gInclusionSet = new UnicodeSet(UnicodeString(inclusionPat, -1, US_INV), status); 61 62 // Note: data from http://unicode.org/Public/security/latest/xidmodifications.txt version 6.3.0 63 // Note: concatenated string constants do not work with UNICODE_STRING_SIMPLE on all platforms. 64 static const char *recommendedPat = 65 "[\\u0030-\\u0039\\u0041-\\u005A\\u005F\\u0061-\\u007A\\u00C0-\\u00D6\\u00D8-\\u00F6" 66 "\\u00F8-\\u0131\\u0134-\\u013E\\u0141-\\u0148\\u014A-\\u017E\\u01A0-\\u01A1\\u01AF-\\u01B0" 67 "\\u01CD-\\u01DC\\u01DE-\\u01E3\\u01E6-\\u01F0\\u01F4-\\u01F5\\u01F8-\\u021B\\u021E-\\u021F" 68 "\\u0226-\\u0233\\u0259\\u02BB-\\u02BC\\u02EC\\u0300-\\u0304\\u0306-\\u030C\\u030F-\\u0311" 69 "\\u0313-\\u0314\\u031B\\u0323-\\u0328\\u032D-\\u032E\\u0330-\\u0331\\u0335\\u0338-\\u0339" 70 "\\u0342\\u0345\\u037B-\\u037D\\u0386\\u0388-\\u038A\\u038C\\u038E-\\u03A1\\u03A3-\\u03CE" 71 "\\u03FC-\\u045F\\u048A-\\u0527\\u0531-\\u0556\\u0559\\u0561-\\u0586\\u05B4\\u05D0-\\u05EA" 72 "\\u05F0-\\u05F2\\u0620-\\u063F\\u0641-\\u0655\\u0660-\\u0669\\u0670-\\u0672\\u0674" 73 "\\u0679-\\u068D\\u068F-\\u06D3\\u06D5\\u06E5-\\u06E6\\u06EE-\\u06FC\\u06FF\\u0750-\\u07B1" 74 "\\u08A0\\u08A2-\\u08AC\\u0901-\\u094D\\u094F-\\u0950\\u0956-\\u0957\\u0960-\\u0963" 75 "\\u0966-\\u096F\\u0971-\\u0977\\u0979-\\u097F\\u0981-\\u0983\\u0985-\\u098C\\u098F-\\u0990" 76 "\\u0993-\\u09A8\\u09AA-\\u09B0\\u09B2\\u09B6-\\u09B9\\u09BC-\\u09C4\\u09C7-\\u09C8" 77 "\\u09CB-\\u09CE\\u09D7\\u09E0-\\u09E3\\u09E6-\\u09F1\\u0A01-\\u0A03\\u0A05-\\u0A0A" 78 "\\u0A0F-\\u0A10\\u0A13-\\u0A28\\u0A2A-\\u0A30\\u0A32\\u0A35\\u0A38-\\u0A39\\u0A3C" 79 "\\u0A3E-\\u0A42\\u0A47-\\u0A48\\u0A4B-\\u0A4D\\u0A5C\\u0A66-\\u0A74\\u0A81-\\u0A83" 80 "\\u0A85-\\u0A8D\\u0A8F-\\u0A91\\u0A93-\\u0AA8\\u0AAA-\\u0AB0\\u0AB2-\\u0AB3\\u0AB5-\\u0AB9" 81 "\\u0ABC-\\u0AC5\\u0AC7-\\u0AC9\\u0ACB-\\u0ACD\\u0AD0\\u0AE0-\\u0AE3\\u0AE6-\\u0AEF" 82 "\\u0B01-\\u0B03\\u0B05-\\u0B0C\\u0B0F-\\u0B10\\u0B13-\\u0B28\\u0B2A-\\u0B30\\u0B32-\\u0B33" 83 "\\u0B35-\\u0B39\\u0B3C-\\u0B43\\u0B47-\\u0B48\\u0B4B-\\u0B4D\\u0B56-\\u0B57\\u0B5F-\\u0B61" 84 "\\u0B66-\\u0B6F\\u0B71\\u0B82-\\u0B83\\u0B85-\\u0B8A\\u0B8E-\\u0B90\\u0B92-\\u0B95" 85 "\\u0B99-\\u0B9A\\u0B9C\\u0B9E-\\u0B9F\\u0BA3-\\u0BA4\\u0BA8-\\u0BAA\\u0BAE-\\u0BB9" 86 "\\u0BBE-\\u0BC2\\u0BC6-\\u0BC8\\u0BCA-\\u0BCD\\u0BD0\\u0BD7\\u0BE6-\\u0BEF\\u0C01-\\u0C03" 87 "\\u0C05-\\u0C0C\\u0C0E-\\u0C10\\u0C12-\\u0C28\\u0C2A-\\u0C33\\u0C35-\\u0C39\\u0C3D-\\u0C44" 88 "\\u0C46-\\u0C48\\u0C4A-\\u0C4D\\u0C55-\\u0C56\\u0C60-\\u0C61\\u0C66-\\u0C6F\\u0C82-\\u0C83" 89 "\\u0C85-\\u0C8C\\u0C8E-\\u0C90\\u0C92-\\u0CA8\\u0CAA-\\u0CB3\\u0CB5-\\u0CB9\\u0CBC-\\u0CC4" 90 "\\u0CC6-\\u0CC8\\u0CCA-\\u0CCD\\u0CD5-\\u0CD6\\u0CE0-\\u0CE3\\u0CE6-\\u0CEF\\u0CF1-\\u0CF2" 91 "\\u0D02-\\u0D03\\u0D05-\\u0D0C\\u0D0E-\\u0D10\\u0D12-\\u0D3A\\u0D3D-\\u0D43\\u0D46-\\u0D48" 92 "\\u0D4A-\\u0D4E\\u0D57\\u0D60-\\u0D61\\u0D66-\\u0D6F\\u0D7A-\\u0D7F\\u0D82-\\u0D83" 93 "\\u0D85-\\u0D8E\\u0D91-\\u0D96\\u0D9A-\\u0DA5\\u0DA7-\\u0DB1\\u0DB3-\\u0DBB\\u0DBD" 94 "\\u0DC0-\\u0DC6\\u0DCA\\u0DCF-\\u0DD4\\u0DD6\\u0DD8-\\u0DDE\\u0DF2\\u0E01-\\u0E32" 95 "\\u0E34-\\u0E3A\\u0E40-\\u0E4E\\u0E50-\\u0E59\\u0E81-\\u0E82\\u0E84\\u0E87-\\u0E88" 96 "\\u0E8A\\u0E8D\\u0E94-\\u0E97\\u0E99-\\u0E9F\\u0EA1-\\u0EA3\\u0EA5\\u0EA7\\u0EAA-\\u0EAB" 97 "\\u0EAD-\\u0EB2\\u0EB4-\\u0EB9\\u0EBB-\\u0EBD\\u0EC0-\\u0EC4\\u0EC6\\u0EC8-\\u0ECD" 98 "\\u0ED0-\\u0ED9\\u0EDE-\\u0EDF\\u0F00\\u0F20-\\u0F29\\u0F35\\u0F37\\u0F3E-\\u0F42" 99 "\\u0F44-\\u0F47\\u0F49-\\u0F4C\\u0F4E-\\u0F51\\u0F53-\\u0F56\\u0F58-\\u0F5B\\u0F5D-\\u0F68" 100 "\\u0F6A-\\u0F6C\\u0F71-\\u0F72\\u0F74\\u0F7A-\\u0F80\\u0F82-\\u0F84\\u0F86-\\u0F92" 101 "\\u0F94-\\u0F97\\u0F99-\\u0F9C\\u0F9E-\\u0FA1\\u0FA3-\\u0FA6\\u0FA8-\\u0FAB\\u0FAD-\\u0FB8" 102 "\\u0FBA-\\u0FBC\\u0FC6\\u1000-\\u1049\\u1050-\\u109D\\u10C7\\u10CD\\u10D0-\\u10F0" 103 "\\u10F7-\\u10FA\\u10FD-\\u10FF\\u1200-\\u1248\\u124A-\\u124D\\u1250-\\u1256\\u1258" 104 "\\u125A-\\u125D\\u1260-\\u1288\\u128A-\\u128D\\u1290-\\u12B0\\u12B2-\\u12B5\\u12B8-\\u12BE" 105 "\\u12C0\\u12C2-\\u12C5\\u12C8-\\u12D6\\u12D8-\\u1310\\u1312-\\u1315\\u1318-\\u135A" 106 "\\u135D-\\u135F\\u1380-\\u138F\\u1780-\\u17A2\\u17A5-\\u17A7\\u17A9-\\u17B3\\u17B6-\\u17CA" 107 "\\u17D2\\u17D7\\u17DC\\u17E0-\\u17E9\\u1E00-\\u1E99\\u1EBF\\u1F00-\\u1F15\\u1F18-\\u1F1D" 108 "\\u1F20-\\u1F45\\u1F48-\\u1F4D\\u1F50-\\u1F57\\u1F59\\u1F5B\\u1F5D\\u1F5F-\\u1F70" 109 "\\u1F72\\u1F74\\u1F76\\u1F78\\u1F7A\\u1F7C\\u1F80-\\u1FB4\\u1FB6-\\u1FBA\\u1FBC\\u1FC2-\\u1FC4" 110 "\\u1FC6-\\u1FC8\\u1FCA\\u1FCC\\u1FD0-\\u1FD2\\u1FD6-\\u1FDA\\u1FE0-\\u1FE2\\u1FE4-\\u1FEA" 111 "\\u1FEC\\u1FF2-\\u1FF4\\u1FF6-\\u1FF8\\u1FFA\\u1FFC\\u2D27\\u2D2D\\u2D80-\\u2D96\\u2DA0-\\u2DA6" 112 "\\u2DA8-\\u2DAE\\u2DB0-\\u2DB6\\u2DB8-\\u2DBE\\u2DC0-\\u2DC6\\u2DC8-\\u2DCE\\u2DD0-\\u2DD6" 113 "\\u2DD8-\\u2DDE\\u3005-\\u3007\\u3041-\\u3096\\u3099-\\u309A\\u309D-\\u309E\\u30A1-\\u30FA" 114 "\\u30FC-\\u30FE\\u3105-\\u312D\\u31A0-\\u31BA\\u3400-\\u4DB5\\u4E00-\\u9FCC\\uA660-\\uA661" 115 "\\uA674-\\uA67B\\uA67F\\uA69F\\uA717-\\uA71F\\uA788\\uA78D-\\uA78E\\uA790-\\uA793" 116 "\\uA7A0-\\uA7AA\\uA7FA\\uA9CF\\uAA60-\\uAA76\\uAA7A-\\uAA7B\\uAB01-\\uAB06\\uAB09-\\uAB0E" 117 "\\uAB11-\\uAB16\\uAB20-\\uAB26\\uAB28-\\uAB2E\\uAC00-\\uD7A3\\uFA0E-\\uFA0F\\uFA11" 118 "\\uFA13-\\uFA14\\uFA1F\\uFA21\\uFA23-\\uFA24\\uFA27-\\uFA29\\U0001B000-\\U0001B001\\U00020000-\\U0002A6D6" 119 "\\U0002A700-\\U0002B734\\U0002B740-\\U0002B81D]"; 120 gRecommendedSet = new UnicodeSet(UnicodeString(recommendedPat, -1, US_INV), status); 121 gNfdNormalizer = Normalizer2::getNFDInstance(status); 122 ucln_i18n_registerCleanup(UCLN_I18N_SPOOF, uspoof_cleanup); 123 } 124 125 126 U_CAPI USpoofChecker * U_EXPORT2 127 uspoof_open(UErrorCode *status) { 128 if (U_FAILURE(*status)) { 129 return NULL; 130 } 131 umtx_initOnce(gSpoofInitOnce, &initializeStatics, *status); 132 SpoofImpl *si = new SpoofImpl(SpoofData::getDefault(*status), *status); 133 if (U_FAILURE(*status)) { 134 delete si; 135 si = NULL; 136 } 137 return reinterpret_cast<USpoofChecker *>(si); 138 } 139 140 141 U_CAPI USpoofChecker * U_EXPORT2 142 uspoof_openFromSerialized(const void *data, int32_t length, int32_t *pActualLength, 143 UErrorCode *status) { 144 if (U_FAILURE(*status)) { 145 return NULL; 146 } 147 umtx_initOnce(gSpoofInitOnce, &initializeStatics, *status); 148 SpoofData *sd = new SpoofData(data, length, *status); 149 SpoofImpl *si = new SpoofImpl(sd, *status); 150 if (U_FAILURE(*status)) { 151 delete sd; 152 delete si; 153 return NULL; 154 } 155 if (sd == NULL || si == NULL) { 156 *status = U_MEMORY_ALLOCATION_ERROR; 157 delete sd; 158 delete si; 159 return NULL; 160 } 161 162 if (pActualLength != NULL) { 163 *pActualLength = sd->fRawData->fLength; 164 } 165 return reinterpret_cast<USpoofChecker *>(si); 166 } 167 168 169 U_CAPI USpoofChecker * U_EXPORT2 170 uspoof_clone(const USpoofChecker *sc, UErrorCode *status) { 171 const SpoofImpl *src = SpoofImpl::validateThis(sc, *status); 172 if (src == NULL) { 173 return NULL; 174 } 175 SpoofImpl *result = new SpoofImpl(*src, *status); // copy constructor 176 if (U_FAILURE(*status)) { 177 delete result; 178 result = NULL; 179 } 180 return reinterpret_cast<USpoofChecker *>(result); 181 } 182 183 184 U_CAPI void U_EXPORT2 185 uspoof_close(USpoofChecker *sc) { 186 UErrorCode status = U_ZERO_ERROR; 187 SpoofImpl *This = SpoofImpl::validateThis(sc, status); 188 delete This; 189 } 190 191 192 U_CAPI void U_EXPORT2 193 uspoof_setChecks(USpoofChecker *sc, int32_t checks, UErrorCode *status) { 194 SpoofImpl *This = SpoofImpl::validateThis(sc, *status); 195 if (This == NULL) { 196 return; 197 } 198 199 // Verify that the requested checks are all ones (bits) that 200 // are acceptable, known values. 201 if (checks & ~(USPOOF_ALL_CHECKS | USPOOF_AUX_INFO)) { 202 *status = U_ILLEGAL_ARGUMENT_ERROR; 203 return; 204 } 205 206 This->fChecks = checks; 207 } 208 209 210 U_CAPI int32_t U_EXPORT2 211 uspoof_getChecks(const USpoofChecker *sc, UErrorCode *status) { 212 const SpoofImpl *This = SpoofImpl::validateThis(sc, *status); 213 if (This == NULL) { 214 return 0; 215 } 216 return This->fChecks; 217 } 218 219 U_CAPI void U_EXPORT2 220 uspoof_setRestrictionLevel(USpoofChecker *sc, URestrictionLevel restrictionLevel) { 221 UErrorCode status = U_ZERO_ERROR; 222 SpoofImpl *This = SpoofImpl::validateThis(sc, status); 223 if (This != NULL) { 224 This->fRestrictionLevel = restrictionLevel; 225 } 226 } 227 228 U_CAPI URestrictionLevel U_EXPORT2 229 uspoof_getRestrictionLevel(const USpoofChecker *sc) { 230 UErrorCode status = U_ZERO_ERROR; 231 const SpoofImpl *This = SpoofImpl::validateThis(sc, status); 232 if (This == NULL) { 233 return USPOOF_UNRESTRICTIVE; 234 } 235 return This->fRestrictionLevel; 236 } 237 238 U_CAPI void U_EXPORT2 239 uspoof_setAllowedLocales(USpoofChecker *sc, const char *localesList, UErrorCode *status) { 240 SpoofImpl *This = SpoofImpl::validateThis(sc, *status); 241 if (This == NULL) { 242 return; 243 } 244 This->setAllowedLocales(localesList, *status); 245 } 246 247 U_CAPI const char * U_EXPORT2 248 uspoof_getAllowedLocales(USpoofChecker *sc, UErrorCode *status) { 249 SpoofImpl *This = SpoofImpl::validateThis(sc, *status); 250 if (This == NULL) { 251 return NULL; 252 } 253 return This->getAllowedLocales(*status); 254 } 255 256 257 U_CAPI const USet * U_EXPORT2 258 uspoof_getAllowedChars(const USpoofChecker *sc, UErrorCode *status) { 259 const UnicodeSet *result = uspoof_getAllowedUnicodeSet(sc, status); 260 return result->toUSet(); 261 } 262 263 U_CAPI const UnicodeSet * U_EXPORT2 264 uspoof_getAllowedUnicodeSet(const USpoofChecker *sc, UErrorCode *status) { 265 const SpoofImpl *This = SpoofImpl::validateThis(sc, *status); 266 if (This == NULL) { 267 return NULL; 268 } 269 return This->fAllowedCharsSet; 270 } 271 272 273 U_CAPI void U_EXPORT2 274 uspoof_setAllowedChars(USpoofChecker *sc, const USet *chars, UErrorCode *status) { 275 const UnicodeSet *set = UnicodeSet::fromUSet(chars); 276 uspoof_setAllowedUnicodeSet(sc, set, status); 277 } 278 279 280 U_CAPI void U_EXPORT2 281 uspoof_setAllowedUnicodeSet(USpoofChecker *sc, const UnicodeSet *chars, UErrorCode *status) { 282 SpoofImpl *This = SpoofImpl::validateThis(sc, *status); 283 if (This == NULL) { 284 return; 285 } 286 if (chars->isBogus()) { 287 *status = U_ILLEGAL_ARGUMENT_ERROR; 288 return; 289 } 290 UnicodeSet *clonedSet = static_cast<UnicodeSet *>(chars->clone()); 291 if (clonedSet == NULL || clonedSet->isBogus()) { 292 *status = U_MEMORY_ALLOCATION_ERROR; 293 return; 294 } 295 clonedSet->freeze(); 296 delete This->fAllowedCharsSet; 297 This->fAllowedCharsSet = clonedSet; 298 This->fChecks |= USPOOF_CHAR_LIMIT; 299 } 300 301 302 U_CAPI int32_t U_EXPORT2 303 uspoof_check(const USpoofChecker *sc, 304 const UChar *id, int32_t length, 305 int32_t *position, 306 UErrorCode *status) { 307 308 const SpoofImpl *This = SpoofImpl::validateThis(sc, *status); 309 if (This == NULL) { 310 return 0; 311 } 312 if (length < -1) { 313 *status = U_ILLEGAL_ARGUMENT_ERROR; 314 return 0; 315 } 316 UnicodeString idStr((length == -1), id, length); // Aliasing constructor. 317 int32_t result = uspoof_checkUnicodeString(sc, idStr, position, status); 318 return result; 319 } 320 321 322 U_CAPI int32_t U_EXPORT2 323 uspoof_checkUTF8(const USpoofChecker *sc, 324 const char *id, int32_t length, 325 int32_t *position, 326 UErrorCode *status) { 327 328 if (U_FAILURE(*status)) { 329 return 0; 330 } 331 UnicodeString idStr = UnicodeString::fromUTF8(StringPiece(id, length>=0 ? length : uprv_strlen(id))); 332 int32_t result = uspoof_checkUnicodeString(sc, idStr, position, status); 333 return result; 334 } 335 336 337 U_CAPI int32_t U_EXPORT2 338 uspoof_areConfusable(const USpoofChecker *sc, 339 const UChar *id1, int32_t length1, 340 const UChar *id2, int32_t length2, 341 UErrorCode *status) { 342 SpoofImpl::validateThis(sc, *status); 343 if (U_FAILURE(*status)) { 344 return 0; 345 } 346 if (length1 < -1 || length2 < -1) { 347 *status = U_ILLEGAL_ARGUMENT_ERROR; 348 return 0; 349 } 350 351 UnicodeString id1Str((length1==-1), id1, length1); // Aliasing constructor 352 UnicodeString id2Str((length2==-1), id2, length2); // Aliasing constructor 353 return uspoof_areConfusableUnicodeString(sc, id1Str, id2Str, status); 354 } 355 356 357 U_CAPI int32_t U_EXPORT2 358 uspoof_areConfusableUTF8(const USpoofChecker *sc, 359 const char *id1, int32_t length1, 360 const char *id2, int32_t length2, 361 UErrorCode *status) { 362 SpoofImpl::validateThis(sc, *status); 363 if (U_FAILURE(*status)) { 364 return 0; 365 } 366 if (length1 < -1 || length2 < -1) { 367 *status = U_ILLEGAL_ARGUMENT_ERROR; 368 return 0; 369 } 370 UnicodeString id1Str = UnicodeString::fromUTF8(StringPiece(id1, length1>=0? length1 : uprv_strlen(id1))); 371 UnicodeString id2Str = UnicodeString::fromUTF8(StringPiece(id2, length2>=0? length2 : uprv_strlen(id2))); 372 int32_t results = uspoof_areConfusableUnicodeString(sc, id1Str, id2Str, status); 373 return results; 374 } 375 376 377 U_CAPI int32_t U_EXPORT2 378 uspoof_areConfusableUnicodeString(const USpoofChecker *sc, 379 const icu::UnicodeString &id1, 380 const icu::UnicodeString &id2, 381 UErrorCode *status) { 382 const SpoofImpl *This = SpoofImpl::validateThis(sc, *status); 383 if (U_FAILURE(*status)) { 384 return 0; 385 } 386 // 387 // See section 4 of UAX 39 for the algorithm for checking whether two strings are confusable, 388 // and for definitions of the types (single, whole, mixed-script) of confusables. 389 390 // We only care about a few of the check flags. Ignore the others. 391 // If no tests relavant to this function have been specified, return an error. 392 // TODO: is this really the right thing to do? It's probably an error on the caller's part, 393 // but logically we would just return 0 (no error). 394 if ((This->fChecks & (USPOOF_SINGLE_SCRIPT_CONFUSABLE | USPOOF_MIXED_SCRIPT_CONFUSABLE | 395 USPOOF_WHOLE_SCRIPT_CONFUSABLE)) == 0) { 396 *status = U_INVALID_STATE_ERROR; 397 return 0; 398 } 399 int32_t flagsForSkeleton = This->fChecks & USPOOF_ANY_CASE; 400 401 int32_t result = 0; 402 IdentifierInfo *identifierInfo = This->getIdentifierInfo(*status); 403 if (U_FAILURE(*status)) { 404 return 0; 405 } 406 identifierInfo->setIdentifier(id1, *status); 407 int32_t id1ScriptCount = identifierInfo->getScriptCount(); 408 identifierInfo->setIdentifier(id2, *status); 409 int32_t id2ScriptCount = identifierInfo->getScriptCount(); 410 This->releaseIdentifierInfo(identifierInfo); 411 identifierInfo = NULL; 412 413 if (This->fChecks & USPOOF_SINGLE_SCRIPT_CONFUSABLE) { 414 UnicodeString id1Skeleton; 415 UnicodeString id2Skeleton; 416 if (id1ScriptCount <= 1 && id2ScriptCount <= 1) { 417 flagsForSkeleton |= USPOOF_SINGLE_SCRIPT_CONFUSABLE; 418 uspoof_getSkeletonUnicodeString(sc, flagsForSkeleton, id1, id1Skeleton, status); 419 uspoof_getSkeletonUnicodeString(sc, flagsForSkeleton, id2, id2Skeleton, status); 420 if (id1Skeleton == id2Skeleton) { 421 result |= USPOOF_SINGLE_SCRIPT_CONFUSABLE; 422 } 423 } 424 } 425 426 if (result & USPOOF_SINGLE_SCRIPT_CONFUSABLE) { 427 // If the two inputs are single script confusable they cannot also be 428 // mixed or whole script confusable, according to the UAX39 definitions. 429 // So we can skip those tests. 430 return result; 431 } 432 433 // Two identifiers are whole script confusable if each is of a single script 434 // and they are mixed script confusable. 435 UBool possiblyWholeScriptConfusables = 436 id1ScriptCount <= 1 && id2ScriptCount <= 1 && (This->fChecks & USPOOF_WHOLE_SCRIPT_CONFUSABLE); 437 438 // 439 // Mixed Script Check 440 // 441 if ((This->fChecks & USPOOF_MIXED_SCRIPT_CONFUSABLE) || possiblyWholeScriptConfusables ) { 442 // For getSkeleton(), resetting the USPOOF_SINGLE_SCRIPT_CONFUSABLE flag will get us 443 // the mixed script table skeleton, which is what we want. 444 // The Any Case / Lower Case bit in the skelton flags was set at the top of the function. 445 UnicodeString id1Skeleton; 446 UnicodeString id2Skeleton; 447 flagsForSkeleton &= ~USPOOF_SINGLE_SCRIPT_CONFUSABLE; 448 uspoof_getSkeletonUnicodeString(sc, flagsForSkeleton, id1, id1Skeleton, status); 449 uspoof_getSkeletonUnicodeString(sc, flagsForSkeleton, id2, id2Skeleton, status); 450 if (id1Skeleton == id2Skeleton) { 451 result |= USPOOF_MIXED_SCRIPT_CONFUSABLE; 452 if (possiblyWholeScriptConfusables) { 453 result |= USPOOF_WHOLE_SCRIPT_CONFUSABLE; 454 } 455 } 456 } 457 458 return result; 459 } 460 461 462 463 464 U_CAPI int32_t U_EXPORT2 465 uspoof_checkUnicodeString(const USpoofChecker *sc, 466 const icu::UnicodeString &id, 467 int32_t *position, 468 UErrorCode *status) { 469 const SpoofImpl *This = SpoofImpl::validateThis(sc, *status); 470 if (This == NULL) { 471 return 0; 472 } 473 int32_t result = 0; 474 475 IdentifierInfo *identifierInfo = NULL; 476 if ((This->fChecks) & (USPOOF_RESTRICTION_LEVEL | USPOOF_MIXED_NUMBERS)) { 477 identifierInfo = This->getIdentifierInfo(*status); 478 if (U_FAILURE(*status)) { 479 goto cleanupAndReturn; 480 } 481 identifierInfo->setIdentifier(id, *status); 482 identifierInfo->setIdentifierProfile(*This->fAllowedCharsSet); 483 } 484 485 486 if ((This->fChecks) & USPOOF_RESTRICTION_LEVEL) { 487 URestrictionLevel idRestrictionLevel = identifierInfo->getRestrictionLevel(*status); 488 if (idRestrictionLevel > This->fRestrictionLevel) { 489 result |= USPOOF_RESTRICTION_LEVEL; 490 } 491 if (This->fChecks & USPOOF_AUX_INFO) { 492 result |= idRestrictionLevel; 493 } 494 } 495 496 if ((This->fChecks) & USPOOF_MIXED_NUMBERS) { 497 const UnicodeSet *numerics = identifierInfo->getNumerics(); 498 if (numerics->size() > 1) { 499 result |= USPOOF_MIXED_NUMBERS; 500 } 501 502 // TODO: ICU4J returns the UnicodeSet of the numerics found in the identifier. 503 // We have no easy way to do the same in C. 504 // if (checkResult != null) { 505 // checkResult.numerics = numerics; 506 // } 507 } 508 509 510 if (This->fChecks & (USPOOF_CHAR_LIMIT)) { 511 int32_t i; 512 UChar32 c; 513 int32_t length = id.length(); 514 for (i=0; i<length ;) { 515 c = id.char32At(i); 516 i += U16_LENGTH(c); 517 if (!This->fAllowedCharsSet->contains(c)) { 518 result |= USPOOF_CHAR_LIMIT; 519 break; 520 } 521 } 522 } 523 524 if (This->fChecks & 525 (USPOOF_WHOLE_SCRIPT_CONFUSABLE | USPOOF_MIXED_SCRIPT_CONFUSABLE | USPOOF_INVISIBLE)) { 526 // These are the checks that need to be done on NFD input 527 UnicodeString nfdText; 528 gNfdNormalizer->normalize(id, nfdText, *status); 529 int32_t nfdLength = nfdText.length(); 530 531 if (This->fChecks & USPOOF_INVISIBLE) { 532 533 // scan for more than one occurence of the same non-spacing mark 534 // in a sequence of non-spacing marks. 535 int32_t i; 536 UChar32 c; 537 UChar32 firstNonspacingMark = 0; 538 UBool haveMultipleMarks = FALSE; 539 UnicodeSet marksSeenSoFar; // Set of combining marks in a single combining sequence. 540 541 for (i=0; i<nfdLength ;) { 542 c = nfdText.char32At(i); 543 i += U16_LENGTH(c); 544 if (u_charType(c) != U_NON_SPACING_MARK) { 545 firstNonspacingMark = 0; 546 if (haveMultipleMarks) { 547 marksSeenSoFar.clear(); 548 haveMultipleMarks = FALSE; 549 } 550 continue; 551 } 552 if (firstNonspacingMark == 0) { 553 firstNonspacingMark = c; 554 continue; 555 } 556 if (!haveMultipleMarks) { 557 marksSeenSoFar.add(firstNonspacingMark); 558 haveMultipleMarks = TRUE; 559 } 560 if (marksSeenSoFar.contains(c)) { 561 // report the error, and stop scanning. 562 // No need to find more than the first failure. 563 result |= USPOOF_INVISIBLE; 564 break; 565 } 566 marksSeenSoFar.add(c); 567 } 568 } 569 570 571 if (This->fChecks & (USPOOF_WHOLE_SCRIPT_CONFUSABLE | USPOOF_MIXED_SCRIPT_CONFUSABLE)) { 572 // The basic test is the same for both whole and mixed script confusables. 573 // Compute the set of scripts that every input character has a confusable in. 574 // For this computation an input character is always considered to be 575 // confusable with itself in its own script. 576 // 577 // If the number of such scripts is two or more, and the input consisted of 578 // characters all from a single script, we have a whole script confusable. 579 // (The two scripts will be the original script and the one that is confusable) 580 // 581 // If the number of such scripts >= one, and the original input contained characters from 582 // more than one script, we have a mixed script confusable. (We can transform 583 // some of the characters, and end up with a visually similar string all in 584 // one script.) 585 586 if (identifierInfo == NULL) { 587 identifierInfo = This->getIdentifierInfo(*status); 588 if (U_FAILURE(*status)) { 589 goto cleanupAndReturn; 590 } 591 identifierInfo->setIdentifier(id, *status); 592 } 593 594 int32_t scriptCount = identifierInfo->getScriptCount(); 595 596 ScriptSet scripts; 597 This->wholeScriptCheck(nfdText, &scripts, *status); 598 int32_t confusableScriptCount = scripts.countMembers(); 599 //printf("confusableScriptCount = %d\n", confusableScriptCount); 600 601 if ((This->fChecks & USPOOF_WHOLE_SCRIPT_CONFUSABLE) && 602 confusableScriptCount >= 2 && 603 scriptCount == 1) { 604 result |= USPOOF_WHOLE_SCRIPT_CONFUSABLE; 605 } 606 607 if ((This->fChecks & USPOOF_MIXED_SCRIPT_CONFUSABLE) && 608 confusableScriptCount >= 1 && 609 scriptCount > 1) { 610 result |= USPOOF_MIXED_SCRIPT_CONFUSABLE; 611 } 612 } 613 } 614 615 cleanupAndReturn: 616 This->releaseIdentifierInfo(identifierInfo); 617 if (position != NULL) { 618 *position = 0; 619 } 620 return result; 621 } 622 623 624 U_CAPI int32_t U_EXPORT2 625 uspoof_getSkeleton(const USpoofChecker *sc, 626 uint32_t type, 627 const UChar *id, int32_t length, 628 UChar *dest, int32_t destCapacity, 629 UErrorCode *status) { 630 631 SpoofImpl::validateThis(sc, *status); 632 if (U_FAILURE(*status)) { 633 return 0; 634 } 635 if (length<-1 || destCapacity<0 || (destCapacity==0 && dest!=NULL)) { 636 *status = U_ILLEGAL_ARGUMENT_ERROR; 637 return 0; 638 } 639 640 UnicodeString idStr((length==-1), id, length); // Aliasing constructor 641 UnicodeString destStr; 642 uspoof_getSkeletonUnicodeString(sc, type, idStr, destStr, status); 643 destStr.extract(dest, destCapacity, *status); 644 return destStr.length(); 645 } 646 647 648 649 U_I18N_API UnicodeString & U_EXPORT2 650 uspoof_getSkeletonUnicodeString(const USpoofChecker *sc, 651 uint32_t type, 652 const UnicodeString &id, 653 UnicodeString &dest, 654 UErrorCode *status) { 655 const SpoofImpl *This = SpoofImpl::validateThis(sc, *status); 656 if (U_FAILURE(*status)) { 657 return dest; 658 } 659 660 int32_t tableMask = 0; 661 switch (type) { 662 case 0: 663 tableMask = USPOOF_ML_TABLE_FLAG; 664 break; 665 case USPOOF_SINGLE_SCRIPT_CONFUSABLE: 666 tableMask = USPOOF_SL_TABLE_FLAG; 667 break; 668 case USPOOF_ANY_CASE: 669 tableMask = USPOOF_MA_TABLE_FLAG; 670 break; 671 case USPOOF_SINGLE_SCRIPT_CONFUSABLE | USPOOF_ANY_CASE: 672 tableMask = USPOOF_SA_TABLE_FLAG; 673 break; 674 default: 675 *status = U_ILLEGAL_ARGUMENT_ERROR; 676 return dest; 677 } 678 679 UnicodeString nfdId; 680 gNfdNormalizer->normalize(id, nfdId, *status); 681 682 // Apply the skeleton mapping to the NFD normalized input string 683 // Accumulate the skeleton, possibly unnormalized, in a UnicodeString. 684 int32_t inputIndex = 0; 685 UnicodeString skelStr; 686 int32_t normalizedLen = nfdId.length(); 687 for (inputIndex=0; inputIndex < normalizedLen; ) { 688 UChar32 c = nfdId.char32At(inputIndex); 689 inputIndex += U16_LENGTH(c); 690 This->confusableLookup(c, tableMask, skelStr); 691 } 692 693 gNfdNormalizer->normalize(skelStr, dest, *status); 694 return dest; 695 } 696 697 698 U_CAPI int32_t U_EXPORT2 699 uspoof_getSkeletonUTF8(const USpoofChecker *sc, 700 uint32_t type, 701 const char *id, int32_t length, 702 char *dest, int32_t destCapacity, 703 UErrorCode *status) { 704 SpoofImpl::validateThis(sc, *status); 705 if (U_FAILURE(*status)) { 706 return 0; 707 } 708 if (length<-1 || destCapacity<0 || (destCapacity==0 && dest!=NULL)) { 709 *status = U_ILLEGAL_ARGUMENT_ERROR; 710 return 0; 711 } 712 713 UnicodeString srcStr = UnicodeString::fromUTF8(StringPiece(id, length>=0 ? length : uprv_strlen(id))); 714 UnicodeString destStr; 715 uspoof_getSkeletonUnicodeString(sc, type, srcStr, destStr, status); 716 if (U_FAILURE(*status)) { 717 return 0; 718 } 719 720 int32_t lengthInUTF8 = 0; 721 u_strToUTF8(dest, destCapacity, &lengthInUTF8, 722 destStr.getBuffer(), destStr.length(), status); 723 return lengthInUTF8; 724 } 725 726 727 U_CAPI int32_t U_EXPORT2 728 uspoof_serialize(USpoofChecker *sc,void *buf, int32_t capacity, UErrorCode *status) { 729 SpoofImpl *This = SpoofImpl::validateThis(sc, *status); 730 if (This == NULL) { 731 U_ASSERT(U_FAILURE(*status)); 732 return 0; 733 } 734 int32_t dataSize = This->fSpoofData->fRawData->fLength; 735 if (capacity < dataSize) { 736 *status = U_BUFFER_OVERFLOW_ERROR; 737 return dataSize; 738 } 739 uprv_memcpy(buf, This->fSpoofData->fRawData, dataSize); 740 return dataSize; 741 } 742 743 U_CAPI const USet * U_EXPORT2 744 uspoof_getInclusionSet(UErrorCode *status) { 745 umtx_initOnce(gSpoofInitOnce, &initializeStatics, *status); 746 return gInclusionSet->toUSet(); 747 } 748 749 U_CAPI const USet * U_EXPORT2 750 uspoof_getRecommendedSet(UErrorCode *status) { 751 umtx_initOnce(gSpoofInitOnce, &initializeStatics, *status); 752 return gRecommendedSet->toUSet(); 753 } 754 755 U_I18N_API const UnicodeSet * U_EXPORT2 756 uspoof_getInclusionUnicodeSet(UErrorCode *status) { 757 umtx_initOnce(gSpoofInitOnce, &initializeStatics, *status); 758 return gInclusionSet; 759 } 760 761 U_I18N_API const UnicodeSet * U_EXPORT2 762 uspoof_getRecommendedUnicodeSet(UErrorCode *status) { 763 umtx_initOnce(gSpoofInitOnce, &initializeStatics, *status); 764 return gRecommendedSet; 765 } 766 767 768 769 #endif // !UCONFIG_NO_NORMALIZATION 770
