def mixcolumn(datalist):
# according to the block length we do 2, 4 or 8 times the mix
datalistmix = []
for i in range(0, len(datalist) - 1, 2):
m11 = Arithmod.add_64bits(Conversions.int2bin_str(datalist[i]), Conversions.int2bin_str(datalist[i + 1]))
m11 = Conversions.bin_str2int(m11)
rotation = Util.rotate_right(Conversions.int2bin_str(datalist[(i + 1)]), R)
m22 = Arithmod.xor_bin_str(Conversions.int2bin_str(m11), Conversions.int2bin_str(rotation))
m22 = Conversions.bin_str2int(m22)
datalistmix.append(m11)
datalistmix.append(m22)
return datalistmix
def inv_mixcolumn(datalist):
# according to the block length we do 2, 4 or 8 times the mix
datalist_unmix = []
for i in range(0, len(datalist) - 1, 2):
xor = Arithmod.xor_bin_str(Conversions.int2bin_str(datalist[i]), Conversions.int2bin_str(datalist[(i + 1)]))
m2 = Util.rotate_left(xor, R)
m1 = Arithmod.subtract_64bits(Conversions.int2bin_str(datalist[i]), Conversions.int2bin_str(m2))
m1 = Conversions.bin_str2int(m1)
datalist_unmix.append(m1)
datalist_unmix.append(m2)
return datalist_unmix
