// generateAffineMasks creates the random external masks for the construction.
func generateAffineMasks(rs *random.Source) (inputMask, outputMask encoding.BlockAffine) {
var inputLinear, outputLinear matrix.Matrix
common.GenerateMasks(rs, common.IndependentMasks{common.RandomMask, common.RandomMask}, &inputLinear, &outputLinear)
reader := rs.Stream(make([]byte, 16))
var inputConstant, outputConstant [16]byte
reader.Read(inputConstant[:])
reader.Read(outputConstant[:])
inputMask = encoding.NewBlockAffine(inputLinear, inputConstant)
outputMask = encoding.NewBlockAffine(outputLinear, outputConstant)
return
}
// generateAffineMasks creates the random external masks for the construction.
func generateAffineMasks(rs *random.Source) (inputMask, outputMask *blockAffine) {
var inputLinear, outputLinear matrix.Matrix
common.GenerateMasks(rs, common.IndependentMasks{common.RandomMask, common.RandomMask}, &inputLinear, &outputLinear)
reader := rs.Stream(make([]byte, 16))
inputConstant, outputConstant := matrix.NewRow(128), matrix.NewRow(128)
reader.Read(inputConstant[:])
reader.Read(outputConstant[:])
inputMask = &blockAffine{linear: inputLinear, constant: inputConstant}
outputMask = &blockAffine{linear: outputLinear, constant: outputConstant}
return
}