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DavidBuchanan314/mtk_geniezone_decrypt.py

Created July 7, 2024 18:01
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mtk_geniezone_decrypt.py
from cryptography.hazmat.primitives.ciphers import Cipher, algorithms, modes
KEY = bytes.fromhex("5c0e349a27dc46034c7b6744a378bd17")
IV = bytes.fromhex("a0b0924686447109f2d51dcddc93458a")
img = open("gz_a.bin", "rb")
img.seek(4)
length = int.from_bytes(img.read(4), "little")
img.seek(0x34)
offset = int.from_bytes(img.read(4), "little")
img.seek(offset)
ciphertext = img.read(length)
cipher = Cipher(algorithms.AES(KEY), modes.CTR(IV))
decryptor = cipher.decryptor()
plaintext = decryptor.update(ciphertext) + decryptor.finalize()
with open("gz_decrypted.bin", "wb") as outfile:
outfile.write(plaintext)
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