class RbNaCl::Boxes::Curve25519XSalsa20Poly1305

def open(nonce, ciphertext)

Returns:
  • (String) - The decrypted message (BINARY encoded)

Raises:
  • (RbNaCl::CryptoError) - If the ciphertext cannot be authenticated.
  • (RbNaCl::LengthError) - If the nonce is not valid

Parameters:
  • ciphertext (String) -- The message to be decrypted.
  • nonce (String) -- A 24-byte string containing the nonce. 
def open(nonce, ciphertext)
  Util.check_length(nonce, nonce_bytes, "Nonce")
  ct = Util.prepend_zeros(BOXZEROBYTES, ciphertext)
  message = Util.zeros(ct.bytesize)
  success = self.class.box_curve25519xsalsa20poly1305_open_afternm(message, ct, ct.bytesize, nonce, beforenm)
  raise CryptoError, "Decryption failed. Ciphertext failed verification." unless success
  Util.remove_zeros(ZEROBYTES, message)
end