using System; namespace Org.BouncyCastle.Math.EC { public abstract class ECPointBase : ECPoint { protected internal ECPointBase(ECCurve curve, ECFieldElement x, ECFieldElement y) : base(curve, x, y) { } protected internal ECPointBase(ECCurve curve, ECFieldElement x, ECFieldElement y, ECFieldElement[] zs) : base(curve, x, y, zs) { } public override byte[] GetEncoded(bool compressed) { if (base.IsInfinity) return new byte[1]; ECPoint eCPoint = Normalize(); byte[] encoded = eCPoint.XCoord.GetEncoded(); if (compressed) { byte[] array = new byte[encoded.Length + 1]; array[0] = (byte)(eCPoint.CompressionYTilde ? 3 : 2); Array.Copy(encoded, 0, array, 1, encoded.Length); return array; } byte[] encoded2 = eCPoint.YCoord.GetEncoded(); byte[] array2 = new byte[encoded.Length + encoded2.Length + 1]; array2[0] = 4; Array.Copy(encoded, 0, array2, 1, encoded.Length); Array.Copy(encoded2, 0, array2, encoded.Length + 1, encoded2.Length); return array2; } public override int GetEncodedLength(bool compressed) { if (base.IsInfinity) return 1; if (compressed) return 1 + XCoord.GetEncodedLength(); return 1 + XCoord.GetEncodedLength() + YCoord.GetEncodedLength(); } public override void EncodeTo(bool compressed, byte[] buf, int off) { if (base.IsInfinity) buf[off] = 0; else { ECPoint eCPoint = Normalize(); ECFieldElement xCoord = eCPoint.XCoord; ECFieldElement yCoord = eCPoint.YCoord; if (compressed) { buf[off] = (byte)(eCPoint.CompressionYTilde ? 3 : 2); xCoord.EncodeTo(buf, off + 1); } else { buf[off] = 4; xCoord.EncodeTo(buf, off + 1); yCoord.EncodeTo(buf, off + 1 + xCoord.GetEncodedLength()); } } } public override ECPoint Multiply(BigInteger k) { return Curve.GetMultiplier().Multiply(this, k); } } }