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import re
import time
Sbox = [
[0xd6, 0x90, 0xe9, 0xfe, 0xcc, 0xe1, 0x3d, 0xb7, 0x16, 0xb6, 0x14, 0xc2, 0x28, 0xfb, 0x2c, 0x05],
[0x2b, 0x67, 0x9a, 0x76, 0x2a, 0xbe, 0x04, 0xc3, 0xaa, 0x44, 0x13, 0x26, 0x49, 0x86, 0x06, 0x99],
[0x9c, 0x42, 0x50, 0xf4, 0x91, 0xef, 0x98, 0x7a, 0x33, 0x54, 0x0b, 0x43, 0xed, 0xcf, 0xac, 0x62],
[0xe4, 0xb3, 0x1c, 0xa9, 0xc9, 0x08, 0xe8, 0x95, 0x80, 0xdf, 0x94, 0xfa, 0x75, 0x8f, 0x3f, 0xa6],
[0x47, 0x07, 0xa7, 0xfc, 0xf3, 0x73, 0x17, 0xba, 0x83, 0x59, 0x3c, 0x19, 0xe6, 0x85, 0x4f, 0xa8],
[0x68, 0x6b, 0x81, 0xb2, 0x71, 0x64, 0xda, 0x8b, 0xf8, 0xeb, 0x0f, 0x4b, 0x70, 0x56, 0x9d, 0x35],
[0x1e, 0x24, 0x0e, 0x5e, 0x63, 0x58, 0xd1, 0xa2, 0x25, 0x22, 0x7c, 0x3b, 0x01, 0x21, 0x78, 0x87],
[0xd4, 0x00, 0x46, 0x57, 0x9f, 0xd3, 0x27, 0x52, 0x4c, 0x36, 0x02, 0xe7, 0xa0, 0xc4, 0xc8, 0x9e],
[0xea, 0xbf, 0x8a, 0xd2, 0x40, 0xc7, 0x38, 0xb5, 0xa3, 0xf7, 0xf2, 0xce, 0xf9, 0x61, 0x15, 0xa1],
[0xe0, 0xae, 0x5d, 0xa4, 0x9b, 0x34, 0x1a, 0x55, 0xad, 0x93, 0x32, 0x30, 0xf5, 0x8c, 0xb1, 0xe3],
[0x1d, 0xf6, 0xe2, 0x2e, 0x82, 0x66, 0xca, 0x60, 0xc0, 0x29, 0x23, 0xab, 0x0d, 0x53, 0x4e, 0x6f],
[0xd5, 0xdb, 0x37, 0x45, 0xde, 0xfd, 0x8e, 0x2f, 0x03, 0xff, 0x6a, 0x72, 0x6d, 0x6c, 0x5b, 0x51],
[0x8d, 0x1b, 0xaf, 0x92, 0xbb, 0xdd, 0xbc, 0x7f, 0x11, 0xd9, 0x5c, 0x41, 0x1f, 0x10, 0x5a, 0xd8],
[0x0a, 0xc1, 0x31, 0x88, 0xa5, 0xcd, 0x7b, 0xbd, 0x2d, 0x74, 0xd0, 0x12, 0xb8, 0xe5, 0xb4, 0xb0],
[0x89, 0x69, 0x97, 0x4a, 0x0c, 0x96, 0x77, 0x7e, 0x65, 0xb9, 0xf1, 0x09, 0xc5, 0x6e, 0xc6, 0x84],
[0x18, 0xf0, 0x7d, 0xec, 0x3a, 0xdc, 0x4d, 0x20, 0x79, 0xee, 0x5f, 0x3e, 0xd7, 0xcb, 0x39, 0x48]
]
CK = [
0x00070e15L, 0x1c232a31L, 0x383f464dL, 0x545b6269L,
0x70777e85L, 0x8c939aa1L, 0xa8afb6bdL, 0xc4cbd2d9L,
0xe0e7eef5L, 0xfc030a11L, 0x181f262dL, 0x343b4249L,
0x50575e65L, 0x6c737a81L, 0x888f969dL, 0xa4abb2b9L,
0xc0c7ced5L, 0xdce3eaf1L, 0xf8ff060dL, 0x141b2229L,
0x30373e45L, 0x4c535a61L, 0x686f767dL, 0x848b9299L,
0xa0a7aeb5L, 0xbcc3cad1L, 0xd8dfe6edL, 0xf4fb0209L,
0x10171e25L, 0x2c333a41L, 0x484f565dL, 0x646b7279L
]
FK = [0xA3B1BAC6L, 0x56AA3350L, 0x677D9197L, 0xB27022DCL]
def LeftRot(n, b): return ((n << b) | ((n & 0xffffffff) >> (32 - b))) & 0xffffffff
def t(A):
b = ''.join(['%02x' %(int(Sbox[int(i[0],16)][int(i[1],16)]))
for i in re.findall(r'.{2}', '%08x' %A)])
return b
def T(A):
B=int(t(A),16)
return B^LeftRot(B,2)^LeftRot(B,10)^LeftRot(B,18)^LeftRot(B,24)
def F(Xi, rki):
xi=[int(i,16) for i in Xi]
return '%08x' %(xi[0] ^ T(xi[1]^xi[2]^xi[3]^rki))
def T_(A):
B=int(t(A),16)
return B^LeftRot(B,13)^LeftRot(B,23)
def encrypto(X,MK):
K=[int(MK[i],16)^FK[i] for i in xrange(4)]
rk=[]
for i in xrange(32):
K += [K[i]^T_(K[i+1]^K[i+2]^K[i+3]^CK[i])]
rk += [K[-1]]
X += [F(m[i:i + 4], rk[i])]
print 'rk['+str(i)+']='+str(K[-1])+', X['+str(i)+']='+X[-1]
return X[-4:][::-1]
time.clock()
m = re.findall(r'.{8}', '0123456789abcdeffedcba9876543210')
key = re.findall(r'.{8}', '0123456789abcdeffedcba9876543210')
print ''.join(encrypto(m,key))
print time.clock(),'s'
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