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package sun.security.ec;

import java.io.IOException;

import java.security.*;
import java.security.interfaces.*;
import java.security.spec.*;

import sun.security.util.*;
import sun.security.x509.*;

Key implementation for EC public keys.
Author: Andreas Sterbenz
Since: 1.6
/** * Key implementation for EC public keys. * * @since 1.6 * @author Andreas Sterbenz */
public final class ECPublicKeyImpl extends X509Key implements ECPublicKey { private static final long serialVersionUID = -2462037275160462289L; private ECPoint w; private ECParameterSpec params;
Construct a key from its components. Used by the ECKeyFactory and SunPKCS11.
/** * Construct a key from its components. Used by the * ECKeyFactory and SunPKCS11. */
public ECPublicKeyImpl(ECPoint w, ECParameterSpec params) throws InvalidKeyException { this.w = w; this.params = params; // generate the encoding algid = new AlgorithmId (AlgorithmId.EC_oid, ECParameters.getAlgorithmParameters(params)); key = ECParameters.encodePoint(w, params.getCurve()); }
Construct a key from its encoding. Used by RSAKeyFactory.
/** * Construct a key from its encoding. Used by RSAKeyFactory. */
public ECPublicKeyImpl(byte[] encoded) throws InvalidKeyException { decode(encoded); } // see JCA doc public String getAlgorithm() { return "EC"; } // see JCA doc public ECPoint getW() { return w; } // see JCA doc public ECParameterSpec getParams() { return params; } // Internal API to get the encoded point. Currently used by SunPKCS11. // This may change/go away depending on what we do with the public API. public byte[] getEncodedPublicValue() { return key.clone(); }
Parse the key. Called by X509Key.
/** * Parse the key. Called by X509Key. */
protected void parseKeyBits() throws InvalidKeyException { try { AlgorithmParameters algParams = this.algid.getParameters(); params = algParams.getParameterSpec(ECParameterSpec.class); w = ECParameters.decodePoint(key, params.getCurve()); } catch (IOException e) { throw new InvalidKeyException("Invalid EC key", e); } catch (InvalidParameterSpecException e) { throw new InvalidKeyException("Invalid EC key", e); } } // return a string representation of this key for debugging public String toString() { return "Sun EC public key, " + params.getCurve().getField().getFieldSize() + " bits\n public x coord: " + w.getAffineX() + "\n public y coord: " + w.getAffineY() + "\n parameters: " + params; } protected Object writeReplace() throws java.io.ObjectStreamException { return new KeyRep(KeyRep.Type.PUBLIC, getAlgorithm(), getFormat(), getEncoded()); } }