A classe Spoofchecker

(PHP 5 >= 5.4.0, PHP 7, PHP 8, PECL intl >= 2.0.0)

Introdução

Esta classe é fornecida porque o Unicode contém um grande número de caractares e incorpora sistemas variados de escrita de todo o mundo e seu uso incorreto pode expor programas ou sistemas a possíveis ataques à segurança usando similaridade de caracteres.

Os métodos fornecidos permitem verificar se uma string individual pode ser uma tentativa de confundir o leitor (spoof detection), como em "pаypаl" escrito com caracteres cirílicos 'а'.

Resumo da classe

class Spoofchecker {

/* Constantes */

public const int SINGLE_SCRIPT_CONFUSABLE;

public const int MIXED_SCRIPT_CONFUSABLE;

public const int WHOLE_SCRIPT_CONFUSABLE;

public const int ANY_CASE;

public const int SINGLE_SCRIPT;

public const int INVISIBLE;

public const int CHAR_LIMIT;

public const int ASCII;

public const int HIGHLY_RESTRICTIVE;

public const int MODERATELY_RESTRICTIVE;

public const int MINIMALLY_RESTRICTIVE;

public const int UNRESTRICTIVE;

public const int SINGLE_SCRIPT_RESTRICTIVE;

public const int MIXED_NUMBERS;

public const int HIDDEN_OVERLAY;

/* Métodos */

public __construct()

public areConfusable(string $string1, string $string2, int &$errorCode = null): bool

public isSuspicious(string $string, int &$errorCode = null): bool

public setAllowedLocales(string $locales): void

public setChecks(int $checks): void

public setRestrictionLevel(int $level): void

}

Constantes predefinidas

Spoofchecker::SINGLE_SCRIPT_CONFUSABLE int
Spoofchecker::MIXED_SCRIPT_CONFUSABLE int
Spoofchecker::WHOLE_SCRIPT_CONFUSABLE int
Spoofchecker::ANY_CASE int
Spoofchecker::SINGLE_SCRIPT int
Spoofchecker::INVISIBLE int
Spoofchecker::CHAR_LIMIT int
Spoofchecker::ASCII int
Spoofchecker::HIGHLY_RESTRICTIVE int
Spoofchecker::MODERATELY_RESTRICTIVE int
Spoofchecker::MINIMALLY_RESTRICTIVE int
Spoofchecker::UNRESTRICTIVE int
Spoofchecker::SINGLE_SCRIPT_RESTRICTIVE int
Spoofchecker::MIXED_NUMBERS int
Spoofchecker::HIDDEN_OVERLAY int

Registro de Alterações

Versão	Descrição
8.4.0	As constantes de classe agora são tipadas.
7.3.0	Constantes de classe usadas por Spoofchecker::setRestrictionLevel() como `Spoofchecker::ASCII`, `Spoofchecker::HIGHLY_RESTRICTIVE`, `Spoofchecker::MODERATELY_RESTRICTIVE`, `Spoofchecker::MINIMALLY_RESTRICTIVE`, `Spoofchecker::UNRESTRICTIVE`, `Spoofchecker::SINGLE_SCRIPT_RESTRICTIVE` foram adicionadas.

Índice

Spoofchecker::areConfusable — Verifica se as strings fornecidas podem ser confundidas
Spoofchecker::__construct — Construtor
Spoofchecker::isSuspicious — Verifica se um texto fornecido contém algum caractere suspeito
Spoofchecker::setAllowedLocales — Localidades a usar nas verificações executadas
Spoofchecker::setChecks — Define as verificações que serão executadas
Spoofchecker::setRestrictionLevel — Define o nível de restrição

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Notas Enviadas por Usuários (em inglês) 2 notes

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Anonymous ¶

7 years ago

From http://icu-project.org/apiref/icu4j/com/ibm/icu/text/SpoofChecker.html :
SINGLE_SCRIPT_CONFUSABLE: indicates that the two strings are visually confusable and that they are from the same script
MIXED_SCRIPT_CONFUSABLE: indicates that the two strings are visually confusable and that they are NOT from the same script
WHOLE_SCRIPT_CONFUSABLE: indicates that the two strings are visually confusable and that they are NOT from the same script BUT both of them are single-script strings
ANY_CASE: Deprecated.
SINGLE_SCRIPT: Deprecated.
INVISIBLE: Check an identifier for the presence of invisible characters, such as zero-width spaces, or character sequences that are likely not to display, such as multiple occurrences of the same non-spacing mark.
CHAR_LIMIT: Check that an identifier contains only characters from a specified set of acceptable characters.

Explanation of whole script, mixed script and single script confusables in UTS 39 section 4 : http://unicode.org/reports/tr39/#Confusable_Detection

Details from Java SpoofChecker class at http://icu-project.org/apiref/icu4j/com/ibm/icu/text/SpoofChecker.html

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-1

Anonymous ¶

6 years ago

Spoofchecker yields false positives by defaut when Whole-Script Confusables (WSC) and Mixed-Script Confusables (MSC) checks are used.
They have been deprecated since ICU 58:
http://bugs.icu-project.org/trac/ticket/12549#comment:10

Workarounds: upgrade ICU to 58+, or avoid the MSC and WSC checks with Spoofcheckers' setChecks() function.

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