com.bouncycastle.asn1.x9.X9ECPoint Maven / Gradle / Ivy

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针对sm2和sm4两种加密算法的java实现

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package com.bouncycastle.asn1.x9;

import com.bouncycastle.asn1.ASN1Encodable;
import com.bouncycastle.asn1.ASN1OctetString;
import com.bouncycastle.asn1.DERObject;
import com.bouncycastle.asn1.DEROctetString;
import com.bouncycastle.math.ec.ECCurve;
import com.bouncycastle.math.ec.ECPoint;

/**
 * class for describing an ECPoint as a DER object.
 */
public class X9ECPoint
    extends ASN1Encodable
{
    ECPoint p;

    public X9ECPoint(
        ECPoint p)
    {
        this.p = p;
    }

    public X9ECPoint(
        ECCurve c,
        ASN1OctetString s)
    {
        this.p = c.decodePoint(s.getOctets());
    }

    public ECPoint getPoint()
    {
        return p;
    }

    /**
     * Produce an object suitable for an ASN1OutputStream.
     *      *  ECPoint ::= OCTET STRING
     * 
     * 
     * Octet string produced using ECPoint.getEncoded().
     */
    public DERObject toASN1Object()
    {
        return new DEROctetString(p.getEncoded());
    }
}