Class: Unisec::Confusables

Inherits:
Object
  • Object
show all
Defined in:
lib/unisec/confusables.rb

Overview

Operations about Unicode confusable characters (homoglyphs).

Class Method Summary collapse

Class Method Details

.list(chr, map: true) ⇒ Array<String>

List confusables characters for a given character

Examples:

Unisec::Confusables.list('!') # => ["！", "ǃ", "ⵑ", "‼", "⁉", "⁈"]
Unisec::Confusables.list('!', map: false) # => ["！", "ǃ", "ⵑ"]

Parameters:

  • chr (String) —

    the character to search confusables for

  • map (Boolean) (defaults to: true) —

    allows partial mapping, includes confusable where the given chart is a part of

Returns:

  • (Array<String>) —

    list of confusables



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# File 'lib/unisec/confusables.rb', line 18

def self.list(chr, map: true)
  Unicode::Confusable.list(chr, map)
end

.list_display(chr, map: true) ⇒ Object

Display a CLI-friendly output listing all confusables corresponding to a character (code point)

Parameters:

  • chr (String) —

    the character to search confusables for

  • map (Boolean) (defaults to: true) —

    allows partial mapping, includes confusable where the given chart is a part of



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# File 'lib/unisec/confusables.rb', line 25

def self.list_display(chr, map: true)
  Confusables.list(chr, map: map).each do |confu|
    puts "#{Utils::String.char2codepoint(confu).ljust(9)} #{confu.ljust(4)} " \
         "#{TwitterCldr::Shared::CodePoint.get(confu.codepoints.first).name}"
  end
  nil
end

.randomize(str) ⇒ String

Replace all characters with random confusables when possible.

Examples:

Unisec::Confusables.randomize('noraj') # => "𝓃ⲟ𝓇𝒶ｊ"
Unisec::Confusables.randomize('noraj') # => "𝗻૦𝚛⍺𝐣"
Unisec::Confusables.randomize('noraj') # => "𝔫𞺄𝕣⍺ｊ"

Parameters:

  • str (String) —

    Unicode string

Returns:

  • (String) —

    input randomized with confusables



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# File 'lib/unisec/confusables.rb', line 40

def self.randomize(str)
  out = ''
  str.each_char do |chr|
    confu = Confusables.list(chr, map: false).sample
    out += confu.nil? ? chr : confu
  end
  out
end

.randomize_display(str) ⇒ Object

Display a CLI-friendly output of a string where characters are replaces with random confusables

Parameters:

  • str (String) —

    Unicode string



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# File 'lib/unisec/confusables.rb', line 51

def self.randomize_display(str)
  display = ->(key, value) { puts Paint[key, :red, :bold].ljust(23) + " #{value}" }
  display.call('Original:', str)
  display.call('Transformed:', Unisec::Confusables.randomize(str))
end