def computeInverseLinearStepList():
"""
Compute the list of all possible values for
(x 0 0 0 0 0 0 0) * Linverse = (y0 y1 y2 y3 y4 y5 y6 y7)
"""
global InverseLinearStepList
gost = GOST()
for value in range(1, 256):
gost.setValue(0, 0, value)
InverseLinearStepList.append(gost.Linverse().getRow(0))
def propagateDifferencesThroughSin(state):
"""
Returns a state containing a possible input difference after applying
the inverse S-Box for the given output difference.
"""
result = GOST()
for x in range(8):
for y in range(8):
result.setValue(x, y, sample(getValidDiffsForInputDiff(state.getValue(x, y)), 1)[0])
return result