55 lines
1.9 KiB
Python
55 lines
1.9 KiB
Python
from Crypto.PublicKey import RSA
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from Crypto.Cipher import AES, PKCS1_v1_5
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from Crypto.Signature import PKCS1_v1_5 as PKCS1_v1_5s
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from Crypto.Util.Padding import unpad
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from Crypto.Hash import SHA1, HMAC
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from sys import argv
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SPP_PROD_KEY = """-----BEGIN RSA PRIVATE KEY-----
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MIICXQIBAAKBgQDXsWBAi5fZLtghWfw8h436oA2jj9NRtXwIflPNtfCZajhZUjie
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lWojg02FFWw/QgKAymqXWOACbvl1kME9PNFMKP42LQNci+TpaGWj8KUr9+llQ7c5
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FD1WYETdxd5BAB6GBWVRQjM6YbgR4/WL3U8IZ/k7sjhrJhLYV5BSP7qHKQIDAQAB
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AoGBAL84RIHUf9GOYxPmR+WNs4RuosjPuGOnBogtHrSvyNbpwX0GlKWbBxbm0DHd
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FTNbnQZ67Vax9x6RLd1ZcMeOhGljjawdN1J69svKdGEfLgk6ZjwY/IK1R+lhcNm6
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6wq7lGZubHks+v4bfoIgNU6PSyrVguMUKyCIZI9UmNLXISbVAkEA2BvXsM7ByJx1
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3UgjmQIIoYJLihaJxxR7VIXZG7k4Q5IE89tSUxNqgPr/KF5MlOBc4U1a3LfkV7E8
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zFC1YG4KKwJBAP+B4YPO+6233rd/Ua73QyXVAAp1rY/ZD/LYnfV/x5tew6HutDIK
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DeDwQ+FAnpbOH6e6MzBEaSn2SxinRy6nLfsCQAK15rCrBzcy7y+FVhz3L5CHB9eF
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jNjYYuueeiik3BXM4Q8F8zRji/RuMYEaHa/IWKHizH70N4L6EB8n6/53ot0CQFhQ
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EB564Eq/Dt/lxdnv5OmioYz7962MnRKXBKHiNJ/jNUM3OllBWGKzKQMmTqpZPF/A
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4AiC3MaANpyi1NuvNRkCQQCr+LBFMuA05e901DwL24dMQsHsd3IDaXaf+ZBImg+M
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60aHSrllG6RLV/Sk5lgKWCUvrIJ97Yza156wV/7U4VFj
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-----END RSA PRIVATE KEY-----"""
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ciph = PKCS1_v1_5.new(RSA.import_key(SPP_PROD_KEY))
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sig = PKCS1_v1_5s.new(RSA.import_key(SPP_PROD_KEY))
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f = open(argv[1], "rb")
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f.seek(0x10)
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aesk_sig = f.read(0x80)
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f.seek(0x90)
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aes_data = f.read(0x80)
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if sig.verify(SHA1.new(aes_data), aesk_sig):
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aeskey = ciph.decrypt(aes_data, 0)
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aes = AES.new(aeskey, AES.MODE_CBC, b"\x00" * 16)
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f.seek(0x110)
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decr_data = unpad(aes.decrypt(f.read()), AES.block_size)
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hmac_key = decr_data[:0x10]
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hmac_sig = decr_data[0x10:0x24]
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ts_data = decr_data[0x28:]
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try:
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hmac = HMAC.new(hmac_key, ts_data, SHA1)
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#hmac.verify(hmac_sig)
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with open(argv[2], "wb") as fw:
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fw.write(ts_data)
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except ValueError:
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print("!!! BAD HMAC !!!")
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else:
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print("!!! BAD SIGNATURE !!!") |