31 lines
726 B
C#
31 lines
726 B
C#
namespace Org.BouncyCastle.Math.EC.Multiplier
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{
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internal class ReferenceMultiplier
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: ECMultiplier
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{
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/**
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* Simple shift-and-add multiplication. Serves as reference implementation
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* to verify (possibly faster) implementations in
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* {@link org.bouncycastle.math.ec.ECPoint ECPoint}.
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*
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* @param p The point to multiply.
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* @param k The factor by which to multiply.
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* @return The result of the point multiplication <code>k * p</code>.
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*/
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public ECPoint Multiply(ECPoint p, BigInteger k, PreCompInfo preCompInfo)
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{
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ECPoint q = p.Curve.Infinity;
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int t = k.BitLength;
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for (int i = 0; i < t; i++)
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{
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if (k.TestBit(i))
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{
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q = q.Add(p);
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}
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p = p.Twice();
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}
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return q;
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}
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}
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}
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