Module: Encryption

Included in:
ClientConnection, PasswordDialog, ServerConnection
Defined in:
lib/game_2d/encryption.rb

Instance Method Summary collapse

Instance Method Details

#decrypt(data, iv) ⇒ Object 



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# File 'lib/game_2d/encryption.rb', line 21

def decrypt(data, iv)
  decipher = make_cipher.decrypt
  decipher.key = @symmetric_key
  decipher.iv = iv
  decipher.update(data) + decipher.final
end

#encrypt(data) ⇒ Object

Returns [encrypted, iv]



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# File 'lib/game_2d/encryption.rb', line 14

def encrypt(data)
  cipher = make_cipher.encrypt
  cipher.key = @symmetric_key
  iv = cipher.random_iv
  [cipher.update(data) + cipher.final, iv]
end

#key=(key) ⇒ Object 



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# File 'lib/game_2d/encryption.rb', line 5

def key=(key)
  @symmetric_key = key
end

#make_cipher ⇒ Object 



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# File 'lib/game_2d/encryption.rb', line 9

def make_cipher
  OpenSSL::Cipher::AES.new(128, :CBC)
end

#make_password_hash(password) ⇒ Object

Same sort of thing /etc/passwd uses. Provides no security against snooping passwords off the wire, but does make it safer to handle the user password file.



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# File 'lib/game_2d/encryption.rb', line 32

def make_password_hash(password)
  password.crypt('RB')
end