Class: YoutubeAudio::Decipher

Inherits:
Object
  • Object
show all
Defined in:
lib/youtube_audio/decipher.rb

Instance Method Summary collapse

Instance Method Details

#decipher(cipher) ⇒ Object

Parameters:

  • cipher (string) —

    youtube signature



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# File 'lib/youtube_audio/decipher.rb', line 6

def decipher(cipher)
  decipher = cipher.split('')
  pb(decipher, 35)
  pb(decipher, 30)
  wh(decipher)
  pb(decipher, 2)
  decipher = p7(decipher, 3)
  wh(decipher)
  pb(decipher, 8)
  decipher = p7(decipher, 2)
  decipher.join('')
end

#p7(a, b) ⇒ Object 



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# File 'lib/youtube_audio/decipher.rb', line 30

def p7(a, b)
  result = a.slice(b, a.length)
  result
end

#pb(a, b) ⇒ Object 



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# File 'lib/youtube_audio/decipher.rb', line 19

def pb(a, b)
  c = a[0]
  a[0] = a[b % a.length]
  a[b % a.length] = c
end

#wh(a) ⇒ Object 



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# File 'lib/youtube_audio/decipher.rb', line 25

def wh(a)
  result = a.reverse!
  result
end