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February 15, 2021 19:05
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Save RDxR10/a62185f119ca1857901f37d47105fdee to your computer and use it in GitHub Desktop.
Desc : Do equations embarrass you? Well, nothing can stop you if you've got the z3al! File : https://shorturl.at/lCOU9
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from z3 import * | |
st = [BitVec(f'{i}', 8) for i in range(0x27)] | |
s = Solver() | |
s.add(st[0x00]^st[0x02]^st[0x04]==0x60) | |
s.add(st[0x04]^st[0x06]^st[0x08]==0x36) | |
s.add(st[0x08]^st[0x0a]^st[0x0c]==0x71) | |
s.add(st[0x0c]^st[0x0e]^st[0x10]==0x32) | |
s.add(st[0x10]^st[0x12]^st[0x14]==0x3f) | |
s.add(st[0x14]^st[0x16]^st[0x18]==0x01) | |
s.add(st[0x18]^st[0x1a]^st[0x1c]==0x2a) | |
s.add(st[0x1c]^st[0x1e]^st[0x20]==0x3f) | |
s.add(st[0x20]^st[0x22]^st[0x24]==0x7a) | |
s.add(st[0x01]^st[0x03]^st[0x05]==0x64) | |
s.add(st[0x05]^st[0x07]^st[0x09]==0x7e) | |
s.add(st[0x09]^st[0x0b]^st[0x0d]==0x74) | |
s.add(st[0x0d]^st[0x0f]^st[0x11]==0x00) | |
s.add(st[0x11]^st[0x13]^st[0x15]==0x58) | |
s.add(st[0x15]^st[0x17]^st[0x19]==0x62) | |
s.add(st[0x19]^st[0x1b]^st[0x1d]==0x5b) | |
s.add(st[0x1d]^st[0x1f]^st[0x21]==0x5c) | |
s.add(st[0x21]^st[0x23]^st[0x25]==0x62) | |
s.add(st[0x00]^st[0x01]^st[0x03]==0x60) | |
s.add(st[0x03]^st[0x04]^st[0x06]==0x70) | |
s.add(st[0x06]^st[0x07]^st[0x09]==0x6c) | |
s.add(st[0x09]^st[0x0a]^st[0x0c]==0x33) | |
s.add(st[0x0c]^st[0x0d]^st[0x0f]==0x68) | |
s.add(st[0x0f]^st[0x10]^st[0x12]==0x3f) | |
s.add(st[0x12]^st[0x13]^st[0x15]==0x63) | |
s.add(st[0x15]^st[0x16]^st[0x18]==0x58) | |
s.add(st[0x18]^st[0x19]^st[0x1b]==0x34) | |
s.add(st[0x1b]^st[0x1c]^st[0x1e]==0x75) | |
s.add(st[0x1e]^st[0x1f]^st[0x21]==0x37) | |
s.add(st[0x21]^st[0x22]^st[0x24]==0x6e) | |
s.add(st[0x01]^st[0x02]^st[0x04]==0x75) | |
s.add(st[0x04]^st[0x05]^st[0x07]==0x6c) | |
s.add(st[0x07]^st[0x08]^st[0x0a]==0x3d) | |
s.add(st[0x0a]^st[0x0b]^st[0x0d]==0x70) | |
s.add(st[0x0d]^st[0x0e]^st[0x10]==0x34) | |
s.add(st[0x10]^st[0x11]^st[0x13]==0x5a) | |
s.add(st[0x13]^st[0x14]^st[0x16]==0x01) | |
s.add(st[0x16]^st[0x17]^st[0x19]==0x0a) | |
s.add(st[0x19]^st[0x1a]^st[0x1c]==0x2d) | |
s.add(st[0x1c]^st[0x1d]^st[0x1f]==0x43) | |
s.add(st[0x1f]^st[0x20]^st[0x22]==0x27) | |
s.add(st[0x22]^st[0x23]^st[0x25]==0x3f) | |
s.add(st[0x00]^st[0x04]^st[0x06]==0x75) | |
s.add(st[0x04]^st[0x08]^st[0x0a]==0x25) | |
s.add(st[0x08]^st[0x0c]^st[0x0e]==0x34) | |
s.add(st[0x0c]^st[0x10]^st[0x12]==0x66) | |
s.add(st[0x10]^st[0x14]^st[0x16]==0x04) | |
s.add(st[0x14]^st[0x18]^st[0x1a]==0x36) | |
s.add(st[0x18]^st[0x1c]^st[0x1e]==0x76) | |
s.add(st[0x1c]^st[0x20]^st[0x22]==0x3b) | |
s.add(st[0x01]^st[0x05]^st[0x07]==0x6a) | |
s.add(st[0x05]^st[0x09]^st[0x0b]==0x31) | |
s.add(st[0x09]^st[0x0d]^st[0x0f]==0x2e) | |
s.add(st[0x0d]^st[0x11]^st[0x13]==0x5e) | |
s.add(st[0x11]^st[0x15]^st[0x17]==0x0a) | |
s.add(st[0x15]^st[0x19]^st[0x1b]==0x33) | |
s.add(st[0x19]^st[0x1d]^st[0x1f]==0x06) | |
s.add(st[0x1d]^st[0x21]^st[0x23]==0x40) | |
print(s.check()) | |
model = s.model() | |
flag = ''.join([chr(int(str(model[st[i]]))) for i in range(len(model))]) | |
print(flag) |
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