Added a script that searched for the mode of unencryption that could unencrypt the answer
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Sammy Pfeiffer
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d4e229b084
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677ed2f425
54
research_decrypt_mode.py
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54
research_decrypt_mode.py
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# -*- coding: utf-8 -*-
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# Got from testing.py
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encrypted_answer = 'L\xd7\xddI\x0b\xc3\xeay\xf1\x07]\x93\x7fY\x0cmVAX\x03\xeb\n}\x99\xd6\x99\xaa\xba\x05\x9d\xaaB\xe2\x97\xb3\xf2\xf8\xd8\x9f\xa6\x13\x177a\xb45A\x0f}\xb3\x99\xa3D?L\x94\xa3\xbcG\xe8\xf2\x14 \xb9.\x8b\xa0\xf1\xa5\xf1\x18\x9aZ2\x8f\xae\x05\xd9\x84H\xa3&\xad\x84\x82w\x9e\xe8\xba\x8a\x87QT\xdd\x12\x8c\x86\xde\xd8\x7fLM\xb9\x81H;JX\x85\x14\x1af!\xb20\xea)\xa8>(\xa9\xce5,\x96\x14\xd7P\x0c\xb3\x02\x9a\x16\xfc\x94\xacT\xa0\xd4\x82\xe5S1\xf4\xe1\x8cB\xad\x89\xc3C\xa6\rt)\xfa\x0b\xfe3\t\xdd\x02\xbe\xecP\xd6\xd7p\xf6\xf3\xb5\xdf6\xfc\x90l\xaa\x06\x8a\xc0XO\x96>\x85\x18\xebN\x08\x13x\xc0\x1ah\xbd\xedO\x99T\xfd\xed\x87C}\x89!\x99Oz\xfe\x927z~ &"\x0e/\x01N\x13\xfa\xd1\x96\x87\x0f\x83\x98d\x12X\xa7\x8c\xa8\x1c/\xbc\xab\xb2:\x07\xa6\x14\xfa\xe3\xd2\x8cG\xd6\x84\xe4[\x8f\x9e\x8f\xbb\x9c\x8a\x80\xbd\xcf\xaf!\xf7E\x1b\x1f\x91\x18\xc2\x8eBE\xfb\x84\xb6\xc5e5Q\xfd\xb8\xcb\xbc\xb4\x9f\xb7\x92\xfe\xae\xda,\xfaA\x94\x7fq\x1e\xd1\x05\xe8=\x9d#,\xe6\xb7y1\xe6\xc7!\xa0\x0bx\xd1\xb3\xad9\xc4\xdd\x99Y\xca\r\x07+\x903\x1e?\x1d_\x8b\xb0M\xff\x14\xc3:\x95\xa8\xee\xc1\xb5\xff\xfb1\x95\xe1\xcaT\xe4D\xcf\xd2%\x11\xeb@`Att\xbe\x11\xfc/\x05\x9a\xd2\x15\r\xb6\x9d\x88\xae\xa8\xd1q\xe5\x9b\x05A\x8d[\xbf\xaaN\x1b\xee\xbf#4\x1c\xd5\xa4\x1f\x0fo\xaf\xd0\x00g\xc1\x9a\x82\x00\x8c_\xd4\xac!{K\xca\x89x\xde\xf9\x8d\x19\xec\x12\x8epY\xdb\x9f\x98\xe6\x88\xe7\xc1\x92\x90\x17\x80\x03Ry\xf1n\x97e\xe2\x8c\xe9\x8c\xd6<\xba2:\x9f\x06g\x05\xaa#\xf4\xca1\x16o\xb5\x8b\xcd\xfe\x814h\xac\xcd\x0e\xd0\x1c\x0c\xc71\x11\xbe\xa5\xb3#\xcfh\x07)\x91\xc7\xc8iy!\x03\xc8\xf0\xb2\x02\xf3\xc7\xdf\xafXm\xf5\xaf\xdd\xc8\xeb\xb3n7\xe34\xa7R\x8c\xaf\xa3\xb7y\xe7\x12\x0f\x0c\xc2\xa8v\x12E\xc3u\xc8Y\x1fh.\xcf\x01\xae\x8c\x00"v\x99V\xad>\xaf\x08)\x83V*\x9b\xad\xc0\x9c\x94\xa5D[\x08s\x88\xd1\xcb\xf6\xf8j\xa1c\xc1yb\xda\x12\xa1~\xf6\xd1"\x14\x11a\x02\xc1\xd3\xf5'
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tmp_aes_key = b'\x82\xeb\x12\x0e\xbeT\x80>!\xaa\x01\xac\xc8\xe1u#d\x1b\x08\xf5G\xc7\xe5g\xa9\xc3\x1d*BC;6'
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tmp_aes_iv = b'r\xbb/\xe8\x0bb,T\x19\x17\xf20WsTf\x1d_C\x83|2h\xd3s\x82\xaeVW\x10v\xff'
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from Crypto.Cipher import AES
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# try all modes
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aes_modes = [AES.MODE_CBC, AES.MODE_CFB, AES.MODE_CTR, AES.MODE_ECB, AES.MODE_OFB, AES.MODE_OPENPGP, AES.MODE_PGP]
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aes_modes_names = ["AES.MODE_CBC", "AES.MODE_CFB", "AES.MODE_CTR", "AES.MODE_ECB", "AES.MODE_OFB", "AES.MODE_OPENPGP", "AES.MODE_PGP"]
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working_modes = []
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working_modenames = []
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for mode, modename in zip(aes_modes, aes_modes_names):
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print("\n\nTrying mode: " + modename + "(" + str(mode) + ")")
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try:
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crypting_object = AES.new(tmp_aes_key, mode, tmp_aes_iv) # encrypter thing
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decrypted_answer = crypting_object.decrypt(encrypted_answer)
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print("decrypted_answer: ")
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print(decrypted_answer.__repr__())
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working_modes.append(mode)
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working_modenames.append(modename)
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except Exception as e:
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print("Exception: " + str(e))
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print("\n\nModes " + str(working_modenames) + " (" + str(working_modes) + ") succesfully unencrypted the answer!")
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# Output was:
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# Trying mode: AES.MODE_CBC(2)
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# Exception: IV must be 16 bytes long
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#
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#
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# Trying mode: AES.MODE_CFB(3)
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# Exception: IV must be 16 bytes long
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#
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#
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# Trying mode: AES.MODE_CTR(6)
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# Exception: 'counter' keyword parameter is required with CTR mode
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#
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#
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# Trying mode: AES.MODE_ECB(1)
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# decrypted_answer:
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# '\xb4\x87<\xc5&\xe2J\x0e\x96\x1a\x08\xeaSR\xc4!.\x17\x0b]ZI\xd6\xdc\xbd5\x87i\x11\x1b\x9d\x04\x93;\xc5\xd7C\xe1[\xb9\xaa\x95a)\x14\xfd\x8f\xe8\xf8\xc7\xb1~\xdf\xd3\xf7\xf8\xdc\xc4v\xae \xd7\xff\x91\x0c}:\xf45T~\xad\x00w\xde\x98\xe7\xd5b\x7f\xafZg\xd0\x01\x1e\xcaF\xc7\xe4,@kS\xc8|\xe4\xedv\xa3g\x121.\x00\x10X$\x00\xd0\xea\x12\xe0\xc0n\xdd\x9c&\xb3\xd9\x15\x97\xc67\xaeH\xef\xfb\xd9\x8eC\x8b\x99\xb6P\x9f&\x9d\x95a\x00\xc3\xac\xd7@\x95\\\x127\x97\xca:\x9b\xfbA\xad\xc5K \xc7\xe1erK\x16\xd3m\xd4\x1b\xd3\xbf\x9e\xc2\x15\xd8\xd6^\xa7r9\xffC\xb0(\xb5W\xa0\n=\x8a\x0b"\x18&\x95l\xc4oF\xd9\xff\x98\xb5\xaf\xbd\xb89\x80p\xffC\xa3\xcb\xff\x8a1p\xd0t0\x13\x89\x1dG\x1e+l\xab\xd9AN$L\xd8~\xedE\xf7\x8c\x93\x0c\xc1\xfd\xdb\xc9\x9d\xe9\x0c\x1d\xbb}8\xf6j\x95>\xae\xee-\x9e?k\xaf\xaer\xe4`\xf9\t\x11\xb4\xd8\x03q*\x83\x13\x02\x0e\xe8\x9d?\xef\x0f\xd3^\xd82o4U\xc4l\xde\x17iJ\xfe\xd4\x8c`\xc6{H\x97\x16\xb7g\xb9\xddeUc\xd4\xc8\xa782IeK\x81\xc3r=!\x92\x97\x0f\x92\xd4\xf6\x01\x93\xa5\xbacL\x8b\x1a\xd5\x1d4\x9a2\x87m6\xc9\xf1\xb0&K\xdfo\xee\xeaQ\xf9\xc3\xa6\xfd?\n\xad\xfc\x9e\xaf\x8c\xfdJd\x84\xa5\x8bBl\xb1\xa0g\x8c\xb47\xf4\xc0`\x88\xe8\x88\n\x85\x81r\xf4J\xe3}\x89]\x8b\xfb|\x10\x05-)\xe2\xba\x96BT:\x16F\xaf\xd8\xa9\xcfew>\xc4QE\x91M\xffc\x07d\x1c\xf2\xb0G\xe5\x04\x03\x9bZ\xa0w\xa4\xd42\x0ex\xc3@\xdd\x9c\x15X\x0ey\x0e+\x12\x13ro\xda\xc2a\xfbH\xd0\x7f\x96\xad\xa7b&\xe7\xca+h\x1b\x13!\xf2\xf0cUw\xd7\x0f\xcd\x10>\x91\xcb\x0e\xba\xc1\xdec\xe6\x11\xdb\xba=y\x97\xe9\xc5\xfcW\x9b\x91)\xf1\x19\x12\xc4L\x83\xee"\xc2S\x9at\xd4\x01({\x01\xdc2e\xe7K\x10C\xa8J\xa3a\x1c=#\x03\x9b\xb2\x8e\xe0\x95\x9a\xf4R\x8d\xcf\xef\x88\xef\xce|\xe7\x9a5\xfe>\x13\x9d\x13\xe9 \xfc[\x02\xe2QP\xd4\x93\xe3\x15uJ3\xe6\xe1B\x12\xbdy\x81G\x9a*\x93K'
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#
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#
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# Trying mode: AES.MODE_OFB(5)
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# Exception: IV must be 16 bytes long
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#
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#
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# Trying mode: AES.MODE_OPENPGP(7)
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# Exception: Length of IV must be 16 or 18 bytes for MODE_OPENPGP
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#
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#
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# Trying mode: AES.MODE_PGP(4)
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# Exception: MODE_PGP is not supported anymore
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