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package sun.security.ec;
import java.io.*;
import java.security.interfaces.XECPrivateKey;
import java.util.Optional;
import java.security.*;
import java.security.spec.*;
import sun.security.pkcs.PKCS8Key;
import sun.security.x509.AlgorithmId;
import sun.security.util.*;
public final class XDHPrivateKeyImpl extends PKCS8Key implements XECPrivateKey {
private static final long serialVersionUID = 1L;
private final AlgorithmParameterSpec paramSpec;
private byte[] k;
XDHPrivateKeyImpl(XECParameters params, byte[] k)
throws InvalidKeyException {
this.paramSpec = new NamedParameterSpec(params.getName());
this.k = k.clone();
this.algid = new AlgorithmId(params.getOid());
encodeKey();
checkLength(params);
}
XDHPrivateKeyImpl(byte[] encoded) throws InvalidKeyException {
decode(encoded);
XECParameters params = XECParameters.get(
InvalidKeyException::new, algid);
paramSpec = new NamedParameterSpec(params.getName());
decodeKey();
checkLength(params);
}
private void decodeKey() throws InvalidKeyException {
try {
DerInputStream derStream = new DerInputStream(key);
k = derStream.getOctetString();
} catch (IOException ex) {
throw new InvalidKeyException(ex);
}
}
private void encodeKey() {
DerOutputStream derKey = new DerOutputStream();
try {
derKey.putOctetString(k);
this.key = derKey.toByteArray();
} catch (IOException ex) {
throw new ProviderException(ex);
}
}
void checkLength(XECParameters params) throws InvalidKeyException {
if (params.getBytes() != this.k.length) {
throw new InvalidKeyException(
"key length must be " + params.getBytes());
}
}
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