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| Simon_96_64, ECB, key="SECCON{xxxx}", plain=0x6d564d37426e6e71, cipher=0xbb5d12ba422834b5
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I found Simon algorithm at : https://github.com/inmcm/Simon_Speck_Ciphers/blob/master/Python/simon.py
Brute Force :
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| from simon import SimonCipher
from libnum import *
plaintxt = 0x6d564d37426e6e71
ciphertxt = 0xbb5d12ba422834b5
block_size = 64
key_size = 96
S = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefgihjklmnopqrstuvwxyz0123456789_'
for a in S[-5:] :
for b in S :
print(a+b+"..")
for c in S :
for d in S :
key = s2n('SECCON{%s}' % str(a+b+c+d))
if a+b+c+d == 'FLAG' :
print(key)
cryp = SimonCipher(key, key_size, block_size, 'ECB')
if plaintxt == cryp.decrypt(ciphertxt) :
print("?????")
print(a+b+c+d)
exit(1)
key == "SECCON{6Pz0}"
|
SECCON{6Pz0}
