Created
October 21, 2016 09:57
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paper.python.216d5b6e2e17f913cd9d692ad17a7f4a
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| def nymaim_config_crypt(self, mem, ndx): | |
| """decrypt final config (read keys and length and decrypt raw data)""" | |
| key0 = mem.dword(ndx) | |
| key1 = mem.dword(ndx+4) | |
| len = mem.dword(ndx+8) | |
| raw = mem.read(ndx + 12, len) | |
| prev_chr = 0 | |
| result = '' | |
| for i, c in enumerate(raw): | |
| bl = ((key0 & 0x000000FF) + prev_chr) & 0xFF | |
| key0 = (key0 & 0xFFFFFF00) + bl | |
| prev_chr = ord(c) ^ bl | |
| result += chr(prev_chr) | |
| key0 = (key0 + key1) & 0xFFFFFFFF | |
| key0 = ((key0 & 0x00FFFFFF) << 8) + ((key0 & 0xFF000000) >> 24) | |
| return result |
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