class ActiveSupport::MessageEncryptor

def _decrypt(encrypted_message, purpose)

Experimental RBS support (using type sampling data from the type_fusion project). 

def _decrypt: (String encrypted_message, String purpose) -> String

This signature was generated using 1 sample from 1 application. 

def _decrypt(encrypted_message, purpose)
  cipher = new_cipher
  encrypted_data, iv, auth_tag = encrypted_message.split("--").map { |v| ::Base64.strict_decode64(v) }
  # Currently the OpenSSL bindings do not raise an error if auth_tag is
  # truncated, which would allow an attacker to easily forge it. See
  # https://github.com/ruby/openssl/issues/63
  raise InvalidMessage if aead_mode? && (auth_tag.nil? || auth_tag.bytes.length != 16)
  cipher.decrypt
  cipher.key = @secret
  cipher.iv  = iv
  if aead_mode?
    cipher.auth_tag = auth_tag
    cipher.auth_data = ""
  end
  decrypted_data = cipher.update(encrypted_data)
  decrypted_data << cipher.final
  message = Messages::Metadata.verify(decrypted_data, purpose)
  @serializer.load(message) if message
rescue OpenSSLCipherError, TypeError, ArgumentError
  raise InvalidMessage
end