from secret import FLAG
from hashlib import sha256


class hash():

    def __init__(self, message):
        self.message = message

    def rotate(self, message):
        return [((b >> 4) | (b << 3)) & 0xff for b in message]

    def hexdigest(self):
        rotated = self.rotate(self.message)
        return sha256(bytes(rotated)).hexdigest()


def main():
    original_message = b"ready_play_one!"
    original_digest = hash(original_message).hexdigest()
    print(
        f"Find a message that generate the same hash as this one: {original_digest}"
    )

    while True:
        try:
            message = input("Enter your message: ")
            message = bytes.fromhex(message)

            digest = hash(message).hexdigest()

            if ((original_digest == digest) and (message != original_message)):
                print(f"{FLAG}")
            else:
                print("Conditions not satisfied!")

        except Exception as e:
            print(f"An error occurred while processing data: {e}")


if __name__ == '__main__':
    main()