77 lines
3.1 KiB
Python
77 lines
3.1 KiB
Python
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import secrets
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import hashlib
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from base64 import b64encode
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from Crypto.Cipher import AES
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from Crypto.Util.Padding import pad
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g = 3
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p = 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class Server():
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def __init__(self, port=3331):
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self.port = port
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self.fKE = FasterKeyExchange(g, p)
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self.y_server = self.fKE.calculate_y()
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self.y_client = 0
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self.IV = "d724c349c2b28831"
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self.key = "313371337"
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def print_banner(self):
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print(" ---_ ......._-_--.")
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print(" (|\ / / /| \ \\")
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print(" / / .' -=-' `.")
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print(" / / .' )")
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print(" _/ / .' _.) /")
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print(" / o o _.-' / .'")
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print(" \ _.-' / .'*|")
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print(" \______.-'// .'.' \*|")
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print(" \| \ | // .'.' _ |*|")
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print(" ` \|// .'.'_ _ _|*|")
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print(" . .// .'.' | _ _ \*|")
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print(" \`-|\_/ / \ _ _ \*\\")
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print(" `/'\__/ \ _ _ \*\\")
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print(" /^| \ _ _ \*")
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print(" ' ` \ _ _ \\")
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print(" \_")
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print("Challenge by pyth0n33. Have fun!")
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def run(self):
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self.print_banner()
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input("Enter to start")
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print("\x1b[2J\x1b[H")
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print("Here's my y={0}\n\n".format(self.y_server))
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self.y_client = int(input("Now give me your y please: "))
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self.key = str(self.fKE.calculate_key(self.y_client))
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self.iv = self.key[0:16]
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self.encrypt()
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def encrypt(self):
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key = bytes(hashlib.md5(bytes(self.key, "utf-8")).hexdigest(), "utf-8")
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cipher = AES.new(key, AES.MODE_CBC, iv=bytes(self.iv, "utf-8"))
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cipher_text_bytes = cipher.encrypt(pad(b"The Advanced Encryption Standard (AES), also known by its original name Rijndael, is a specification for the encryption of electronic data established by the U.S. National Institute of Standards and Technology (NIST) in 2001.", AES.block_size))
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print(b64encode(cipher_text_bytes))
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class FasterKeyExchange():
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def __init__(self, g, p):
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self.g = g
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self.p = p
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self.x = self.get_random_x()
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def get_random_x(self):
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return secrets.SystemRandom().randint(g, p-2)
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def calculate_y(self):
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return (self.g * self.x) % self.p
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def calculate_key(self, y):
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return (y * self.x) % self.p
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if __name__ == "__main__":
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server = Server()
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server.run()
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