32 lines
843 B
Python
32 lines
843 B
Python
from .crypt import ea_symmetric_crypt
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from .lz77 import lz77_compress, lz77_decompress
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def wrap(packet, info=None, compressed=True):
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if compressed:
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packet = lz77_compress(packet)
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if info is None:
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return packet
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return ea_symmetric_crypt(packet, info)
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def unwrap(packet, info=None, compressed=True):
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if info is None:
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decrypted = packet
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else:
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decrypted = ea_symmetric_crypt(packet, info)
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if compressed is None:
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try:
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decompressed = lz77_decompress(decrypted)
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except IndexError:
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return decrypted
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if decompressed == b"\0\0\0\0\0\0":
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# Decompression almost certainly failed
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return decrypted
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return decompressed
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return lz77_decompress(decrypted) if compressed else decrypted
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__all__ = ("wrap", "unwrap")
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