Line data Source code
1 : // © 2016 and later: Unicode, Inc. and others.
2 : // License & terms of use: http://www.unicode.org/copyright.html
3 : /*
4 : ***************************************************************************
5 : * Copyright (C) 2008-2015, International Business Machines Corporation
6 : * and others. All Rights Reserved.
7 : ***************************************************************************
8 : * file name: uspoof.cpp
9 : * encoding: UTF-8
10 : * tab size: 8 (not used)
11 : * indentation:4
12 : *
13 : * created on: 2008Feb13
14 : * created by: Andy Heninger
15 : *
16 : * Unicode Spoof Detection
17 : */
18 : #include "unicode/utypes.h"
19 : #include "unicode/normalizer2.h"
20 : #include "unicode/uspoof.h"
21 : #include "unicode/ustring.h"
22 : #include "unicode/utf16.h"
23 : #include "cmemory.h"
24 : #include "cstring.h"
25 : #include "mutex.h"
26 : #include "scriptset.h"
27 : #include "uassert.h"
28 : #include "ucln_in.h"
29 : #include "uspoof_impl.h"
30 : #include "umutex.h"
31 :
32 :
33 : #if !UCONFIG_NO_NORMALIZATION
34 :
35 : U_NAMESPACE_USE
36 :
37 :
38 : //
39 : // Static Objects used by the spoof impl, their thread safe initialization and their cleanup.
40 : //
41 : static UnicodeSet *gInclusionSet = NULL;
42 : static UnicodeSet *gRecommendedSet = NULL;
43 : static const Normalizer2 *gNfdNormalizer = NULL;
44 : static UInitOnce gSpoofInitStaticsOnce = U_INITONCE_INITIALIZER;
45 :
46 : static UBool U_CALLCONV
47 0 : uspoof_cleanup(void) {
48 0 : delete gInclusionSet;
49 0 : gInclusionSet = NULL;
50 0 : delete gRecommendedSet;
51 0 : gRecommendedSet = NULL;
52 0 : gNfdNormalizer = NULL;
53 0 : gSpoofInitStaticsOnce.reset();
54 0 : return TRUE;
55 : }
56 :
57 0 : static void U_CALLCONV initializeStatics(UErrorCode &status) {
58 : static const char *inclusionPat =
59 : "['\\-.\\:\\u00B7\\u0375\\u058A\\u05F3\\u05F4\\u06FD\\u06FE\\u0F0B\\u200C\\u200D\\u2010\\u"
60 : "2019\\u2027\\u30A0\\u30FB]";
61 0 : gInclusionSet = new UnicodeSet(UnicodeString(inclusionPat, -1, US_INV), status);
62 0 : gInclusionSet->freeze();
63 :
64 : // Note: data from http://unicode.org/Public/security/9.0.0/IdentifierStatus.txt
65 : // There is tooling to generate this constant in the unicodetools project:
66 : // org.unicode.text.tools.RecommendedSetGenerator
67 : // It will print the Java and C++ code to the console for easy copy-paste into this file.
68 : // Note: concatenated string constants do not work with UNICODE_STRING_SIMPLE on all platforms.
69 : static const char *recommendedPat =
70 : "[0-9A-Z_a-z\\u00C0-\\u00D6\\u00D8-\\u00F6\\u00F8-\\u0131\\u0134-\\u013E\\u0141-\\u014"
71 : "8\\u014A-\\u017E\\u018F\\u01A0\\u01A1\\u01AF\\u01B0\\u01CD-\\u01DC\\u01DE-\\u01E3\\u01E"
72 : "6-\\u01F0\\u01F4\\u01F5\\u01F8-\\u021B\\u021E\\u021F\\u0226-\\u0233\\u0259\\u02BB\\u02B"
73 : "C\\u02EC\\u0300-\\u0304\\u0306-\\u030C\\u030F-\\u0311\\u0313\\u0314\\u031B\\u0323-\\u03"
74 : "28\\u032D\\u032E\\u0330\\u0331\\u0335\\u0338\\u0339\\u0342\\u0345\\u037B-\\u037D\\u0386"
75 : "\\u0388-\\u038A\\u038C\\u038E-\\u03A1\\u03A3-\\u03CE\\u03FC-\\u045F\\u048A-\\u0529\\u05"
76 : "2E\\u052F\\u0531-\\u0556\\u0559\\u0561-\\u0586\\u05B4\\u05D0-\\u05EA\\u05F0-\\u05F2\\u0"
77 : "620-\\u063F\\u0641-\\u0655\\u0660-\\u0669\\u0670-\\u0672\\u0674\\u0679-\\u068D\\u068F-"
78 : "\\u06D3\\u06D5\\u06E5\\u06E6\\u06EE-\\u06FC\\u06FF\\u0750-\\u07B1\\u08A0-\\u08AC\\u08B2"
79 : "\\u08B6-\\u08BD\\u0901-\\u094D\\u094F\\u0950\\u0956\\u0957\\u0960-\\u0963\\u0966-\\u096"
80 : "F\\u0971-\\u0977\\u0979-\\u097F\\u0981-\\u0983\\u0985-\\u098C\\u098F\\u0990\\u0993-\\u0"
81 : "9A8\\u09AA-\\u09B0\\u09B2\\u09B6-\\u09B9\\u09BC-\\u09C4\\u09C7\\u09C8\\u09CB-\\u09CE\\u"
82 : "09D7\\u09E0-\\u09E3\\u09E6-\\u09F1\\u0A01-\\u0A03\\u0A05-\\u0A0A\\u0A0F\\u0A10\\u0A13-"
83 : "\\u0A28\\u0A2A-\\u0A30\\u0A32\\u0A35\\u0A38\\u0A39\\u0A3C\\u0A3E-\\u0A42\\u0A47\\u0A48\\"
84 : "u0A4B-\\u0A4D\\u0A5C\\u0A66-\\u0A74\\u0A81-\\u0A83\\u0A85-\\u0A8D\\u0A8F-\\u0A91\\u0A9"
85 : "3-\\u0AA8\\u0AAA-\\u0AB0\\u0AB2\\u0AB3\\u0AB5-\\u0AB9\\u0ABC-\\u0AC5\\u0AC7-\\u0AC9\\u0"
86 : "ACB-\\u0ACD\\u0AD0\\u0AE0-\\u0AE3\\u0AE6-\\u0AEF\\u0B01-\\u0B03\\u0B05-\\u0B0C\\u0B0F\\"
87 : "u0B10\\u0B13-\\u0B28\\u0B2A-\\u0B30\\u0B32\\u0B33\\u0B35-\\u0B39\\u0B3C-\\u0B43\\u0B47"
88 : "\\u0B48\\u0B4B-\\u0B4D\\u0B56\\u0B57\\u0B5F-\\u0B61\\u0B66-\\u0B6F\\u0B71\\u0B82\\u0B83"
89 : "\\u0B85-\\u0B8A\\u0B8E-\\u0B90\\u0B92-\\u0B95\\u0B99\\u0B9A\\u0B9C\\u0B9E\\u0B9F\\u0BA3"
90 : "\\u0BA4\\u0BA8-\\u0BAA\\u0BAE-\\u0BB9\\u0BBE-\\u0BC2\\u0BC6-\\u0BC8\\u0BCA-\\u0BCD\\u0B"
91 : "D0\\u0BD7\\u0BE6-\\u0BEF\\u0C01-\\u0C03\\u0C05-\\u0C0C\\u0C0E-\\u0C10\\u0C12-\\u0C28\\u"
92 : "0C2A-\\u0C33\\u0C35-\\u0C39\\u0C3D-\\u0C44\\u0C46-\\u0C48\\u0C4A-\\u0C4D\\u0C55\\u0C56"
93 : "\\u0C60\\u0C61\\u0C66-\\u0C6F\\u0C80\\u0C82\\u0C83\\u0C85-\\u0C8C\\u0C8E-\\u0C90\\u0C92"
94 : "-\\u0CA8\\u0CAA-\\u0CB3\\u0CB5-\\u0CB9\\u0CBC-\\u0CC4\\u0CC6-\\u0CC8\\u0CCA-\\u0CCD\\u0"
95 : "CD5\\u0CD6\\u0CE0-\\u0CE3\\u0CE6-\\u0CEF\\u0CF1\\u0CF2\\u0D02\\u0D03\\u0D05-\\u0D0C\\u0"
96 : "D0E-\\u0D10\\u0D12-\\u0D3A\\u0D3D-\\u0D43\\u0D46-\\u0D48\\u0D4A-\\u0D4E\\u0D54-\\u0D57"
97 : "\\u0D60\\u0D61\\u0D66-\\u0D6F\\u0D7A-\\u0D7F\\u0D82\\u0D83\\u0D85-\\u0D8E\\u0D91-\\u0D9"
98 : "6\\u0D9A-\\u0DA5\\u0DA7-\\u0DB1\\u0DB3-\\u0DBB\\u0DBD\\u0DC0-\\u0DC6\\u0DCA\\u0DCF-\\u0"
99 : "DD4\\u0DD6\\u0DD8-\\u0DDE\\u0DF2\\u0E01-\\u0E32\\u0E34-\\u0E3A\\u0E40-\\u0E4E\\u0E50-\\"
100 : "u0E59\\u0E81\\u0E82\\u0E84\\u0E87\\u0E88\\u0E8A\\u0E8D\\u0E94-\\u0E97\\u0E99-\\u0E9F\\u"
101 : "0EA1-\\u0EA3\\u0EA5\\u0EA7\\u0EAA\\u0EAB\\u0EAD-\\u0EB2\\u0EB4-\\u0EB9\\u0EBB-\\u0EBD\\"
102 : "u0EC0-\\u0EC4\\u0EC6\\u0EC8-\\u0ECD\\u0ED0-\\u0ED9\\u0EDE\\u0EDF\\u0F00\\u0F20-\\u0F29"
103 : "\\u0F35\\u0F37\\u0F3E-\\u0F42\\u0F44-\\u0F47\\u0F49-\\u0F4C\\u0F4E-\\u0F51\\u0F53-\\u0F"
104 : "56\\u0F58-\\u0F5B\\u0F5D-\\u0F68\\u0F6A-\\u0F6C\\u0F71\\u0F72\\u0F74\\u0F7A-\\u0F80\\u0"
105 : "F82-\\u0F84\\u0F86-\\u0F92\\u0F94-\\u0F97\\u0F99-\\u0F9C\\u0F9E-\\u0FA1\\u0FA3-\\u0FA6"
106 : "\\u0FA8-\\u0FAB\\u0FAD-\\u0FB8\\u0FBA-\\u0FBC\\u0FC6\\u1000-\\u1049\\u1050-\\u109D\\u10"
107 : "C7\\u10CD\\u10D0-\\u10F0\\u10F7-\\u10FA\\u10FD-\\u10FF\\u1200-\\u1248\\u124A-\\u124D\\u"
108 : "1250-\\u1256\\u1258\\u125A-\\u125D\\u1260-\\u1288\\u128A-\\u128D\\u1290-\\u12B0\\u12B2"
109 : "-\\u12B5\\u12B8-\\u12BE\\u12C0\\u12C2-\\u12C5\\u12C8-\\u12D6\\u12D8-\\u1310\\u1312-\\u1"
110 : "315\\u1318-\\u135A\\u135D-\\u135F\\u1380-\\u138F\\u1780-\\u17A2\\u17A5-\\u17A7\\u17A9-"
111 : "\\u17B3\\u17B6-\\u17CA\\u17D2\\u17D7\\u17DC\\u17E0-\\u17E9\\u1C80-\\u1C88\\u1E00-\\u1E9"
112 : "9\\u1E9E\\u1EA0-\\u1EF9\\u1F00-\\u1F15\\u1F18-\\u1F1D\\u1F20-\\u1F45\\u1F48-\\u1F4D\\u1"
113 : "F50-\\u1F57\\u1F59\\u1F5B\\u1F5D\\u1F5F-\\u1F70\\u1F72\\u1F74\\u1F76\\u1F78\\u1F7A\\u1F"
114 : "7C\\u1F80-\\u1FB4\\u1FB6-\\u1FBA\\u1FBC\\u1FC2-\\u1FC4\\u1FC6-\\u1FC8\\u1FCA\\u1FCC\\u1"
115 : "FD0-\\u1FD2\\u1FD6-\\u1FDA\\u1FE0-\\u1FE2\\u1FE4-\\u1FEA\\u1FEC\\u1FF2-\\u1FF4\\u1FF6-"
116 : "\\u1FF8\\u1FFA\\u1FFC\\u2D27\\u2D2D\\u2D80-\\u2D96\\u2DA0-\\u2DA6\\u2DA8-\\u2DAE\\u2DB0"
117 : "-\\u2DB6\\u2DB8-\\u2DBE\\u2DC0-\\u2DC6\\u2DC8-\\u2DCE\\u2DD0-\\u2DD6\\u2DD8-\\u2DDE\\u3"
118 : "005-\\u3007\\u3041-\\u3096\\u3099\\u309A\\u309D\\u309E\\u30A1-\\u30FA\\u30FC-\\u30FE\\u"
119 : "3105-\\u312D\\u31A0-\\u31BA\\u3400-\\u4DB5\\u4E00-\\u9FD5\\uA660\\uA661\\uA674-\\uA67B"
120 : "\\uA67F\\uA69F\\uA717-\\uA71F\\uA788\\uA78D\\uA78E\\uA790-\\uA793\\uA7A0-\\uA7AA\\uA7AE"
121 : "\\uA7FA\\uA9E7-\\uA9FE\\uAA60-\\uAA76\\uAA7A-\\uAA7F\\uAB01-\\uAB06\\uAB09-\\uAB0E\\uAB"
122 : "11-\\uAB16\\uAB20-\\uAB26\\uAB28-\\uAB2E\\uAC00-\\uD7A3\\uFA0E\\uFA0F\\uFA11\\uFA13\\uF"
123 : "A14\\uFA1F\\uFA21\\uFA23\\uFA24\\uFA27-\\uFA29\\U00020000-\\U0002A6D6\\U0002A700-\\U0"
124 : "002B734\\U0002B740-\\U0002B81D\\U0002B820-\\U0002CEA1]";
125 :
126 0 : gRecommendedSet = new UnicodeSet(UnicodeString(recommendedPat, -1, US_INV), status);
127 0 : gRecommendedSet->freeze();
128 0 : gNfdNormalizer = Normalizer2::getNFDInstance(status);
129 0 : ucln_i18n_registerCleanup(UCLN_I18N_SPOOF, uspoof_cleanup);
130 0 : }
131 :
132 0 : U_CFUNC void uspoof_internalInitStatics(UErrorCode *status) {
133 0 : umtx_initOnce(gSpoofInitStaticsOnce, &initializeStatics, *status);
134 0 : }
135 :
136 : U_CAPI USpoofChecker * U_EXPORT2
137 0 : uspoof_open(UErrorCode *status) {
138 0 : umtx_initOnce(gSpoofInitStaticsOnce, &initializeStatics, *status);
139 0 : if (U_FAILURE(*status)) {
140 0 : return NULL;
141 : }
142 0 : SpoofImpl *si = new SpoofImpl(*status);
143 0 : if (U_SUCCESS(*status) && si == NULL) {
144 0 : *status = U_MEMORY_ALLOCATION_ERROR;
145 : }
146 0 : if (U_FAILURE(*status)) {
147 0 : delete si;
148 0 : si = NULL;
149 : }
150 0 : return si->asUSpoofChecker();
151 : }
152 :
153 :
154 : U_CAPI USpoofChecker * U_EXPORT2
155 0 : uspoof_openFromSerialized(const void *data, int32_t length, int32_t *pActualLength,
156 : UErrorCode *status) {
157 0 : if (U_FAILURE(*status)) {
158 0 : return NULL;
159 : }
160 0 : umtx_initOnce(gSpoofInitStaticsOnce, &initializeStatics, *status);
161 0 : SpoofData *sd = new SpoofData(data, length, *status);
162 0 : SpoofImpl *si = new SpoofImpl(sd, *status);
163 0 : if (U_FAILURE(*status)) {
164 0 : delete sd;
165 0 : delete si;
166 0 : return NULL;
167 : }
168 0 : if (sd == NULL || si == NULL) {
169 0 : *status = U_MEMORY_ALLOCATION_ERROR;
170 0 : delete sd;
171 0 : delete si;
172 0 : return NULL;
173 : }
174 :
175 0 : if (pActualLength != NULL) {
176 0 : *pActualLength = sd->size();
177 : }
178 0 : return si->asUSpoofChecker();
179 : }
180 :
181 :
182 : U_CAPI USpoofChecker * U_EXPORT2
183 0 : uspoof_clone(const USpoofChecker *sc, UErrorCode *status) {
184 0 : const SpoofImpl *src = SpoofImpl::validateThis(sc, *status);
185 0 : if (src == NULL) {
186 0 : return NULL;
187 : }
188 0 : SpoofImpl *result = new SpoofImpl(*src, *status); // copy constructor
189 0 : if (U_FAILURE(*status)) {
190 0 : delete result;
191 0 : result = NULL;
192 : }
193 0 : return result->asUSpoofChecker();
194 : }
195 :
196 :
197 : U_CAPI void U_EXPORT2
198 0 : uspoof_close(USpoofChecker *sc) {
199 0 : UErrorCode status = U_ZERO_ERROR;
200 0 : SpoofImpl *This = SpoofImpl::validateThis(sc, status);
201 0 : delete This;
202 0 : }
203 :
204 :
205 : U_CAPI void U_EXPORT2
206 0 : uspoof_setChecks(USpoofChecker *sc, int32_t checks, UErrorCode *status) {
207 0 : SpoofImpl *This = SpoofImpl::validateThis(sc, *status);
208 0 : if (This == NULL) {
209 0 : return;
210 : }
211 :
212 : // Verify that the requested checks are all ones (bits) that
213 : // are acceptable, known values.
214 0 : if (checks & ~(USPOOF_ALL_CHECKS | USPOOF_AUX_INFO)) {
215 0 : *status = U_ILLEGAL_ARGUMENT_ERROR;
216 0 : return;
217 : }
218 :
219 0 : This->fChecks = checks;
220 : }
221 :
222 :
223 : U_CAPI int32_t U_EXPORT2
224 0 : uspoof_getChecks(const USpoofChecker *sc, UErrorCode *status) {
225 0 : const SpoofImpl *This = SpoofImpl::validateThis(sc, *status);
226 0 : if (This == NULL) {
227 0 : return 0;
228 : }
229 0 : return This->fChecks;
230 : }
231 :
232 : U_CAPI void U_EXPORT2
233 0 : uspoof_setRestrictionLevel(USpoofChecker *sc, URestrictionLevel restrictionLevel) {
234 0 : UErrorCode status = U_ZERO_ERROR;
235 0 : SpoofImpl *This = SpoofImpl::validateThis(sc, status);
236 0 : if (This != NULL) {
237 0 : This->fRestrictionLevel = restrictionLevel;
238 0 : This->fChecks |= USPOOF_RESTRICTION_LEVEL;
239 : }
240 0 : }
241 :
242 : U_CAPI URestrictionLevel U_EXPORT2
243 0 : uspoof_getRestrictionLevel(const USpoofChecker *sc) {
244 0 : UErrorCode status = U_ZERO_ERROR;
245 0 : const SpoofImpl *This = SpoofImpl::validateThis(sc, status);
246 0 : if (This == NULL) {
247 0 : return USPOOF_UNRESTRICTIVE;
248 : }
249 0 : return This->fRestrictionLevel;
250 : }
251 :
252 : U_CAPI void U_EXPORT2
253 0 : uspoof_setAllowedLocales(USpoofChecker *sc, const char *localesList, UErrorCode *status) {
254 0 : SpoofImpl *This = SpoofImpl::validateThis(sc, *status);
255 0 : if (This == NULL) {
256 0 : return;
257 : }
258 0 : This->setAllowedLocales(localesList, *status);
259 : }
260 :
261 : U_CAPI const char * U_EXPORT2
262 0 : uspoof_getAllowedLocales(USpoofChecker *sc, UErrorCode *status) {
263 0 : SpoofImpl *This = SpoofImpl::validateThis(sc, *status);
264 0 : if (This == NULL) {
265 0 : return NULL;
266 : }
267 0 : return This->getAllowedLocales(*status);
268 : }
269 :
270 :
271 : U_CAPI const USet * U_EXPORT2
272 0 : uspoof_getAllowedChars(const USpoofChecker *sc, UErrorCode *status) {
273 0 : const UnicodeSet *result = uspoof_getAllowedUnicodeSet(sc, status);
274 0 : return result->toUSet();
275 : }
276 :
277 : U_CAPI const UnicodeSet * U_EXPORT2
278 0 : uspoof_getAllowedUnicodeSet(const USpoofChecker *sc, UErrorCode *status) {
279 0 : const SpoofImpl *This = SpoofImpl::validateThis(sc, *status);
280 0 : if (This == NULL) {
281 0 : return NULL;
282 : }
283 0 : return This->fAllowedCharsSet;
284 : }
285 :
286 :
287 : U_CAPI void U_EXPORT2
288 0 : uspoof_setAllowedChars(USpoofChecker *sc, const USet *chars, UErrorCode *status) {
289 0 : const UnicodeSet *set = UnicodeSet::fromUSet(chars);
290 0 : uspoof_setAllowedUnicodeSet(sc, set, status);
291 0 : }
292 :
293 :
294 : U_CAPI void U_EXPORT2
295 0 : uspoof_setAllowedUnicodeSet(USpoofChecker *sc, const UnicodeSet *chars, UErrorCode *status) {
296 0 : SpoofImpl *This = SpoofImpl::validateThis(sc, *status);
297 0 : if (This == NULL) {
298 0 : return;
299 : }
300 0 : if (chars->isBogus()) {
301 0 : *status = U_ILLEGAL_ARGUMENT_ERROR;
302 0 : return;
303 : }
304 0 : UnicodeSet *clonedSet = static_cast<UnicodeSet *>(chars->clone());
305 0 : if (clonedSet == NULL || clonedSet->isBogus()) {
306 0 : *status = U_MEMORY_ALLOCATION_ERROR;
307 0 : return;
308 : }
309 0 : clonedSet->freeze();
310 0 : delete This->fAllowedCharsSet;
311 0 : This->fAllowedCharsSet = clonedSet;
312 0 : This->fChecks |= USPOOF_CHAR_LIMIT;
313 : }
314 :
315 :
316 : U_CAPI int32_t U_EXPORT2
317 0 : uspoof_check(const USpoofChecker *sc,
318 : const UChar *id, int32_t length,
319 : int32_t *position,
320 : UErrorCode *status) {
321 :
322 : // Backwards compatibility:
323 0 : if (position != NULL) {
324 0 : *position = 0;
325 : }
326 :
327 : // Delegate to uspoof_check2
328 0 : return uspoof_check2(sc, id, length, NULL, status);
329 : }
330 :
331 :
332 : U_CAPI int32_t U_EXPORT2
333 0 : uspoof_check2(const USpoofChecker *sc,
334 : const UChar* id, int32_t length,
335 : USpoofCheckResult* checkResult,
336 : UErrorCode *status) {
337 :
338 0 : const SpoofImpl *This = SpoofImpl::validateThis(sc, *status);
339 0 : if (This == NULL) {
340 0 : return 0;
341 : }
342 0 : if (length < -1) {
343 0 : *status = U_ILLEGAL_ARGUMENT_ERROR;
344 0 : return 0;
345 : }
346 0 : UnicodeString idStr((length == -1), id, length); // Aliasing constructor.
347 0 : int32_t result = uspoof_check2UnicodeString(sc, idStr, checkResult, status);
348 0 : return result;
349 : }
350 :
351 :
352 : U_CAPI int32_t U_EXPORT2
353 0 : uspoof_checkUTF8(const USpoofChecker *sc,
354 : const char *id, int32_t length,
355 : int32_t *position,
356 : UErrorCode *status) {
357 :
358 : // Backwards compatibility:
359 0 : if (position != NULL) {
360 0 : *position = 0;
361 : }
362 :
363 : // Delegate to uspoof_check2
364 0 : return uspoof_check2UTF8(sc, id, length, NULL, status);
365 : }
366 :
367 :
368 : U_CAPI int32_t U_EXPORT2
369 0 : uspoof_check2UTF8(const USpoofChecker *sc,
370 : const char *id, int32_t length,
371 : USpoofCheckResult* checkResult,
372 : UErrorCode *status) {
373 :
374 0 : if (U_FAILURE(*status)) {
375 0 : return 0;
376 : }
377 0 : UnicodeString idStr = UnicodeString::fromUTF8(StringPiece(id, length>=0 ? length : uprv_strlen(id)));
378 0 : int32_t result = uspoof_check2UnicodeString(sc, idStr, checkResult, status);
379 0 : return result;
380 : }
381 :
382 :
383 : U_CAPI int32_t U_EXPORT2
384 0 : uspoof_areConfusable(const USpoofChecker *sc,
385 : const UChar *id1, int32_t length1,
386 : const UChar *id2, int32_t length2,
387 : UErrorCode *status) {
388 0 : SpoofImpl::validateThis(sc, *status);
389 0 : if (U_FAILURE(*status)) {
390 0 : return 0;
391 : }
392 0 : if (length1 < -1 || length2 < -1) {
393 0 : *status = U_ILLEGAL_ARGUMENT_ERROR;
394 0 : return 0;
395 : }
396 :
397 0 : UnicodeString id1Str((length1==-1), id1, length1); // Aliasing constructor
398 0 : UnicodeString id2Str((length2==-1), id2, length2); // Aliasing constructor
399 0 : return uspoof_areConfusableUnicodeString(sc, id1Str, id2Str, status);
400 : }
401 :
402 :
403 : U_CAPI int32_t U_EXPORT2
404 0 : uspoof_areConfusableUTF8(const USpoofChecker *sc,
405 : const char *id1, int32_t length1,
406 : const char *id2, int32_t length2,
407 : UErrorCode *status) {
408 0 : SpoofImpl::validateThis(sc, *status);
409 0 : if (U_FAILURE(*status)) {
410 0 : return 0;
411 : }
412 0 : if (length1 < -1 || length2 < -1) {
413 0 : *status = U_ILLEGAL_ARGUMENT_ERROR;
414 0 : return 0;
415 : }
416 0 : UnicodeString id1Str = UnicodeString::fromUTF8(StringPiece(id1, length1>=0? length1 : uprv_strlen(id1)));
417 0 : UnicodeString id2Str = UnicodeString::fromUTF8(StringPiece(id2, length2>=0? length2 : uprv_strlen(id2)));
418 0 : int32_t results = uspoof_areConfusableUnicodeString(sc, id1Str, id2Str, status);
419 0 : return results;
420 : }
421 :
422 :
423 : U_CAPI int32_t U_EXPORT2
424 0 : uspoof_areConfusableUnicodeString(const USpoofChecker *sc,
425 : const icu::UnicodeString &id1,
426 : const icu::UnicodeString &id2,
427 : UErrorCode *status) {
428 0 : const SpoofImpl *This = SpoofImpl::validateThis(sc, *status);
429 0 : if (U_FAILURE(*status)) {
430 0 : return 0;
431 : }
432 : //
433 : // See section 4 of UAX 39 for the algorithm for checking whether two strings are confusable,
434 : // and for definitions of the types (single, whole, mixed-script) of confusables.
435 :
436 : // We only care about a few of the check flags. Ignore the others.
437 : // If no tests relavant to this function have been specified, return an error.
438 : // TODO: is this really the right thing to do? It's probably an error on the caller's part,
439 : // but logically we would just return 0 (no error).
440 0 : if ((This->fChecks & USPOOF_CONFUSABLE) == 0) {
441 0 : *status = U_INVALID_STATE_ERROR;
442 0 : return 0;
443 : }
444 :
445 : // Compute the skeletons and check for confusability.
446 0 : UnicodeString id1Skeleton;
447 0 : uspoof_getSkeletonUnicodeString(sc, 0 /* deprecated */, id1, id1Skeleton, status);
448 0 : UnicodeString id2Skeleton;
449 0 : uspoof_getSkeletonUnicodeString(sc, 0 /* deprecated */, id2, id2Skeleton, status);
450 0 : if (U_FAILURE(*status)) { return 0; }
451 0 : if (id1Skeleton != id2Skeleton) {
452 0 : return 0;
453 : }
454 :
455 : // If we get here, the strings are confusable. Now we just need to set the flags for the appropriate classes
456 : // of confusables according to UTS 39 section 4.
457 : // Start by computing the resolved script sets of id1 and id2.
458 0 : ScriptSet id1RSS;
459 0 : This->getResolvedScriptSet(id1, id1RSS, *status);
460 0 : ScriptSet id2RSS;
461 0 : This->getResolvedScriptSet(id2, id2RSS, *status);
462 :
463 : // Turn on all applicable flags
464 0 : int32_t result = 0;
465 0 : if (id1RSS.intersects(id2RSS)) {
466 0 : result |= USPOOF_SINGLE_SCRIPT_CONFUSABLE;
467 : } else {
468 0 : result |= USPOOF_MIXED_SCRIPT_CONFUSABLE;
469 0 : if (!id1RSS.isEmpty() && !id2RSS.isEmpty()) {
470 0 : result |= USPOOF_WHOLE_SCRIPT_CONFUSABLE;
471 : }
472 : }
473 :
474 : // Turn off flags that the user doesn't want
475 0 : if ((This->fChecks & USPOOF_SINGLE_SCRIPT_CONFUSABLE) == 0) {
476 0 : result &= ~USPOOF_SINGLE_SCRIPT_CONFUSABLE;
477 : }
478 0 : if ((This->fChecks & USPOOF_MIXED_SCRIPT_CONFUSABLE) == 0) {
479 0 : result &= ~USPOOF_MIXED_SCRIPT_CONFUSABLE;
480 : }
481 0 : if ((This->fChecks & USPOOF_WHOLE_SCRIPT_CONFUSABLE) == 0) {
482 0 : result &= ~USPOOF_WHOLE_SCRIPT_CONFUSABLE;
483 : }
484 :
485 0 : return result;
486 : }
487 :
488 :
489 : U_CAPI int32_t U_EXPORT2
490 0 : uspoof_checkUnicodeString(const USpoofChecker *sc,
491 : const icu::UnicodeString &id,
492 : int32_t *position,
493 : UErrorCode *status) {
494 :
495 : // Backwards compatibility:
496 0 : if (position != NULL) {
497 0 : *position = 0;
498 : }
499 :
500 : // Delegate to uspoof_check2
501 0 : return uspoof_check2UnicodeString(sc, id, NULL, status);
502 : }
503 :
504 0 : int32_t checkImpl(const SpoofImpl* This, const UnicodeString& id, CheckResult* checkResult, UErrorCode* status) {
505 0 : U_ASSERT(This != NULL);
506 0 : U_ASSERT(checkResult != NULL);
507 0 : checkResult->clear();
508 0 : int32_t result = 0;
509 :
510 0 : if (0 != (This->fChecks & USPOOF_RESTRICTION_LEVEL)) {
511 0 : URestrictionLevel idRestrictionLevel = This->getRestrictionLevel(id, *status);
512 0 : if (idRestrictionLevel > This->fRestrictionLevel) {
513 0 : result |= USPOOF_RESTRICTION_LEVEL;
514 : }
515 0 : checkResult->fRestrictionLevel = idRestrictionLevel;
516 : }
517 :
518 0 : if (0 != (This->fChecks & USPOOF_MIXED_NUMBERS)) {
519 0 : UnicodeSet numerics;
520 0 : This->getNumerics(id, numerics, *status);
521 0 : if (numerics.size() > 1) {
522 0 : result |= USPOOF_MIXED_NUMBERS;
523 : }
524 0 : checkResult->fNumerics = numerics; // UnicodeSet::operator=
525 : }
526 :
527 :
528 0 : if (0 != (This->fChecks & USPOOF_CHAR_LIMIT)) {
529 : int32_t i;
530 : UChar32 c;
531 0 : int32_t length = id.length();
532 0 : for (i=0; i<length ;) {
533 0 : c = id.char32At(i);
534 0 : i += U16_LENGTH(c);
535 0 : if (!This->fAllowedCharsSet->contains(c)) {
536 0 : result |= USPOOF_CHAR_LIMIT;
537 0 : break;
538 : }
539 : }
540 : }
541 :
542 0 : if (0 != (This->fChecks & USPOOF_INVISIBLE)) {
543 : // This check needs to be done on NFD input
544 0 : UnicodeString nfdText;
545 0 : gNfdNormalizer->normalize(id, nfdText, *status);
546 0 : int32_t nfdLength = nfdText.length();
547 :
548 : // scan for more than one occurence of the same non-spacing mark
549 : // in a sequence of non-spacing marks.
550 : int32_t i;
551 : UChar32 c;
552 0 : UChar32 firstNonspacingMark = 0;
553 0 : UBool haveMultipleMarks = FALSE;
554 0 : UnicodeSet marksSeenSoFar; // Set of combining marks in a single combining sequence.
555 :
556 0 : for (i=0; i<nfdLength ;) {
557 0 : c = nfdText.char32At(i);
558 0 : i += U16_LENGTH(c);
559 0 : if (u_charType(c) != U_NON_SPACING_MARK) {
560 0 : firstNonspacingMark = 0;
561 0 : if (haveMultipleMarks) {
562 0 : marksSeenSoFar.clear();
563 0 : haveMultipleMarks = FALSE;
564 : }
565 0 : continue;
566 : }
567 0 : if (firstNonspacingMark == 0) {
568 0 : firstNonspacingMark = c;
569 0 : continue;
570 : }
571 0 : if (!haveMultipleMarks) {
572 0 : marksSeenSoFar.add(firstNonspacingMark);
573 0 : haveMultipleMarks = TRUE;
574 : }
575 0 : if (marksSeenSoFar.contains(c)) {
576 : // report the error, and stop scanning.
577 : // No need to find more than the first failure.
578 0 : result |= USPOOF_INVISIBLE;
579 0 : break;
580 : }
581 0 : marksSeenSoFar.add(c);
582 : }
583 : }
584 :
585 0 : checkResult->fChecks = result;
586 0 : return checkResult->toCombinedBitmask(This->fChecks);
587 : }
588 :
589 : U_CAPI int32_t U_EXPORT2
590 0 : uspoof_check2UnicodeString(const USpoofChecker *sc,
591 : const icu::UnicodeString &id,
592 : USpoofCheckResult* checkResult,
593 : UErrorCode *status) {
594 0 : const SpoofImpl *This = SpoofImpl::validateThis(sc, *status);
595 0 : if (This == NULL) {
596 0 : return FALSE;
597 : }
598 :
599 0 : if (checkResult != NULL) {
600 0 : CheckResult* ThisCheckResult = CheckResult::validateThis(checkResult, *status);
601 0 : if (ThisCheckResult == NULL) {
602 0 : return FALSE;
603 : }
604 0 : return checkImpl(This, id, ThisCheckResult, status);
605 : } else {
606 : // Stack-allocate the checkResult since this method doesn't return it
607 0 : CheckResult stackCheckResult;
608 0 : return checkImpl(This, id, &stackCheckResult, status);
609 : }
610 : }
611 :
612 :
613 : U_CAPI int32_t U_EXPORT2
614 0 : uspoof_getSkeleton(const USpoofChecker *sc,
615 : uint32_t type,
616 : const UChar *id, int32_t length,
617 : UChar *dest, int32_t destCapacity,
618 : UErrorCode *status) {
619 :
620 0 : SpoofImpl::validateThis(sc, *status);
621 0 : if (U_FAILURE(*status)) {
622 0 : return 0;
623 : }
624 0 : if (length<-1 || destCapacity<0 || (destCapacity==0 && dest!=NULL)) {
625 0 : *status = U_ILLEGAL_ARGUMENT_ERROR;
626 0 : return 0;
627 : }
628 :
629 0 : UnicodeString idStr((length==-1), id, length); // Aliasing constructor
630 0 : UnicodeString destStr;
631 0 : uspoof_getSkeletonUnicodeString(sc, type, idStr, destStr, status);
632 0 : destStr.extract(dest, destCapacity, *status);
633 0 : return destStr.length();
634 : }
635 :
636 :
637 :
638 : U_I18N_API UnicodeString & U_EXPORT2
639 0 : uspoof_getSkeletonUnicodeString(const USpoofChecker *sc,
640 : uint32_t /*type*/,
641 : const UnicodeString &id,
642 : UnicodeString &dest,
643 : UErrorCode *status) {
644 0 : const SpoofImpl *This = SpoofImpl::validateThis(sc, *status);
645 0 : if (U_FAILURE(*status)) {
646 0 : return dest;
647 : }
648 :
649 0 : UnicodeString nfdId;
650 0 : gNfdNormalizer->normalize(id, nfdId, *status);
651 :
652 : // Apply the skeleton mapping to the NFD normalized input string
653 : // Accumulate the skeleton, possibly unnormalized, in a UnicodeString.
654 0 : int32_t inputIndex = 0;
655 0 : UnicodeString skelStr;
656 0 : int32_t normalizedLen = nfdId.length();
657 0 : for (inputIndex=0; inputIndex < normalizedLen; ) {
658 0 : UChar32 c = nfdId.char32At(inputIndex);
659 0 : inputIndex += U16_LENGTH(c);
660 0 : This->fSpoofData->confusableLookup(c, skelStr);
661 : }
662 :
663 0 : gNfdNormalizer->normalize(skelStr, dest, *status);
664 0 : return dest;
665 : }
666 :
667 :
668 : U_CAPI int32_t U_EXPORT2
669 0 : uspoof_getSkeletonUTF8(const USpoofChecker *sc,
670 : uint32_t type,
671 : const char *id, int32_t length,
672 : char *dest, int32_t destCapacity,
673 : UErrorCode *status) {
674 0 : SpoofImpl::validateThis(sc, *status);
675 0 : if (U_FAILURE(*status)) {
676 0 : return 0;
677 : }
678 0 : if (length<-1 || destCapacity<0 || (destCapacity==0 && dest!=NULL)) {
679 0 : *status = U_ILLEGAL_ARGUMENT_ERROR;
680 0 : return 0;
681 : }
682 :
683 0 : UnicodeString srcStr = UnicodeString::fromUTF8(StringPiece(id, length>=0 ? length : uprv_strlen(id)));
684 0 : UnicodeString destStr;
685 0 : uspoof_getSkeletonUnicodeString(sc, type, srcStr, destStr, status);
686 0 : if (U_FAILURE(*status)) {
687 0 : return 0;
688 : }
689 :
690 0 : int32_t lengthInUTF8 = 0;
691 0 : u_strToUTF8(dest, destCapacity, &lengthInUTF8,
692 0 : destStr.getBuffer(), destStr.length(), status);
693 0 : return lengthInUTF8;
694 : }
695 :
696 :
697 : U_CAPI int32_t U_EXPORT2
698 0 : uspoof_serialize(USpoofChecker *sc,void *buf, int32_t capacity, UErrorCode *status) {
699 0 : SpoofImpl *This = SpoofImpl::validateThis(sc, *status);
700 0 : if (This == NULL) {
701 0 : U_ASSERT(U_FAILURE(*status));
702 0 : return 0;
703 : }
704 :
705 0 : return This->fSpoofData->serialize(buf, capacity, *status);
706 : }
707 :
708 : U_CAPI const USet * U_EXPORT2
709 0 : uspoof_getInclusionSet(UErrorCode *status) {
710 0 : umtx_initOnce(gSpoofInitStaticsOnce, &initializeStatics, *status);
711 0 : return gInclusionSet->toUSet();
712 : }
713 :
714 : U_CAPI const USet * U_EXPORT2
715 0 : uspoof_getRecommendedSet(UErrorCode *status) {
716 0 : umtx_initOnce(gSpoofInitStaticsOnce, &initializeStatics, *status);
717 0 : return gRecommendedSet->toUSet();
718 : }
719 :
720 : U_I18N_API const UnicodeSet * U_EXPORT2
721 0 : uspoof_getInclusionUnicodeSet(UErrorCode *status) {
722 0 : umtx_initOnce(gSpoofInitStaticsOnce, &initializeStatics, *status);
723 0 : return gInclusionSet;
724 : }
725 :
726 : U_I18N_API const UnicodeSet * U_EXPORT2
727 0 : uspoof_getRecommendedUnicodeSet(UErrorCode *status) {
728 0 : umtx_initOnce(gSpoofInitStaticsOnce, &initializeStatics, *status);
729 0 : return gRecommendedSet;
730 : }
731 :
732 : //------------------
733 : // CheckResult APIs
734 : //------------------
735 :
736 : U_CAPI USpoofCheckResult* U_EXPORT2
737 0 : uspoof_openCheckResult(UErrorCode *status) {
738 0 : CheckResult* checkResult = new CheckResult();
739 0 : if (checkResult == NULL) {
740 0 : *status = U_MEMORY_ALLOCATION_ERROR;
741 0 : return NULL;
742 : }
743 0 : return checkResult->asUSpoofCheckResult();
744 : }
745 :
746 : U_CAPI void U_EXPORT2
747 0 : uspoof_closeCheckResult(USpoofCheckResult* checkResult) {
748 0 : UErrorCode status = U_ZERO_ERROR;
749 0 : CheckResult* This = CheckResult::validateThis(checkResult, status);
750 0 : delete This;
751 0 : }
752 :
753 : U_CAPI int32_t U_EXPORT2
754 0 : uspoof_getCheckResultChecks(const USpoofCheckResult *checkResult, UErrorCode *status) {
755 0 : const CheckResult* This = CheckResult::validateThis(checkResult, *status);
756 0 : if (U_FAILURE(*status)) { return 0; }
757 0 : return This->fChecks;
758 : }
759 :
760 : U_CAPI URestrictionLevel U_EXPORT2
761 0 : uspoof_getCheckResultRestrictionLevel(const USpoofCheckResult *checkResult, UErrorCode *status) {
762 0 : const CheckResult* This = CheckResult::validateThis(checkResult, *status);
763 0 : if (U_FAILURE(*status)) { return USPOOF_UNRESTRICTIVE; }
764 0 : return This->fRestrictionLevel;
765 : }
766 :
767 : U_CAPI const USet* U_EXPORT2
768 0 : uspoof_getCheckResultNumerics(const USpoofCheckResult *checkResult, UErrorCode *status) {
769 0 : const CheckResult* This = CheckResult::validateThis(checkResult, *status);
770 0 : if (U_FAILURE(*status)) { return NULL; }
771 0 : return This->fNumerics.toUSet();
772 : }
773 :
774 :
775 :
776 : #endif // !UCONFIG_NO_NORMALIZATION
|
