Method decrypt_file

XORcipher/XOR_cipher.py:155–177

input: filename (str) and a key (int) output: returns true if decrypt process was successful otherwise false if key not passed the method uses the key by the constructor. otherwise key = 1

(self, file, key)

        return True

    def decrypt_file(self, file, key):
        """
        input: filename (str) and a key (int)
        output: returns true if decrypt process was
        successful otherwise false
        if key not passed the method uses the key by the constructor.
        otherwise key = 1
        """

        # precondition
        assert isinstance(file, str) and isinstance(key, int)

        try:
            with open(file, "r") as fin:
                with open("decrypt.out", "w+") as fout:
                    # actual encrypt-process
                    for line in fin:
                        fout.write(self.decrypt_string(line, key))

        except:
            return False

        return True


# Tests