Package org.bouncycastle.math.ec
Class WNafL2RMultiplier
- java.lang.Object
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- org.bouncycastle.math.ec.AbstractECMultiplier
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- org.bouncycastle.math.ec.WNafL2RMultiplier
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- All Implemented Interfaces:
ECMultiplier
public class WNafL2RMultiplier extends AbstractECMultiplier
Class implementing the WNAF (Window Non-Adjacent Form) multiplication algorithm.
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Constructor Summary
Constructors Constructor Description WNafL2RMultiplier()
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description protected int
getWindowSize(int bits)
Determine window width to use for a scalar multiplication of the given size.protected ECPoint
multiplyPositive(ECPoint p, java.math.BigInteger k)
Multipliesthis
by an integerk
using the Window NAF method.-
Methods inherited from class org.bouncycastle.math.ec.AbstractECMultiplier
checkResult, multiply
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Method Detail
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multiplyPositive
protected ECPoint multiplyPositive(ECPoint p, java.math.BigInteger k)
Multipliesthis
by an integerk
using the Window NAF method.- Specified by:
multiplyPositive
in classAbstractECMultiplier
- Parameters:
k
- The integer by whichthis
is multiplied.- Returns:
- A new
ECPoint
which equalsthis
multiplied byk
.
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getWindowSize
protected int getWindowSize(int bits)
Determine window width to use for a scalar multiplication of the given size.- Parameters:
bits
- the bit-length of the scalar to multiply by- Returns:
- the window size to use
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