40 lines
1.2 KiB
Python
40 lines
1.2 KiB
Python
# synacor.py - An implementation of the Synacor Challenge
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# Copyright © 2017 RunasSudo
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Affero General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Affero General Public License for more details.
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#
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# You should have received a copy of the GNU Affero General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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import pickle
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# Read code into memory
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SYN_MEM = [0] * 32768
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with open('challenge.bin', 'rb') as data:
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i = 0
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while True:
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byteData = data.read(2)
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if len(byteData) < 2:
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break
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SYN_MEM[i] = struct.unpack('<H', byteData)[0]
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i += 1
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# Emulate 06bb
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for R1 in range(0x17b4, 0x7562):
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R0 = SYN_MEM[R1]
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R0 ^= pow(R1, 2, 32768)
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R0 ^= 0x4154
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SYN_MEM[R1] = R0
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# Jump past self-test
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SYN_PTR = 0x0377
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