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package cz.crcs.ectester.standalone.libs.jni;
import cz.crcs.ectester.common.util.ECUtil;
import java.io.ByteArrayOutputStream;
import java.security.*;
import java.security.interfaces.ECPrivateKey;
import java.security.interfaces.ECPublicKey;
import java.security.spec.ECParameterSpec;
/**
* @author Jan Jancar johny@neuromancer.sk
*/
public abstract class NativeSignatureSpi extends SignatureSpi {
private ECPublicKey verifyKey;
private ECPrivateKey signKey;
private ECParameterSpec params;
private ByteArrayOutputStream buffer = new ByteArrayOutputStream();
@Override
protected void engineInitVerify(PublicKey publicKey) throws InvalidKeyException {
if (!(publicKey instanceof ECPublicKey)) {
throw new InvalidKeyException
("Key must be an instance of ECPublicKey");
}
verifyKey = (ECPublicKey) publicKey;
params = verifyKey.getParams();
buffer.reset();
}
@Override
protected void engineInitSign(PrivateKey privateKey) throws InvalidKeyException {
if (!(privateKey instanceof ECPrivateKey)) {
throw new InvalidKeyException
("Key must be an instance of ECPrivateKey");
}
signKey = (ECPrivateKey) privateKey;
params = signKey.getParams();
buffer.reset();
}
@Override
protected void engineUpdate(byte b) throws SignatureException {
buffer.write(b);
}
@Override
protected void engineUpdate(byte[] b, int off, int len) throws SignatureException {
buffer.write(b, off, len);
}
@Override
protected byte[] engineSign() throws SignatureException {
return sign(buffer.toByteArray(), ECUtil.toByteArray(signKey.getS(), params.getCurve().getField().getFieldSize()), params);
}
@Override
protected boolean engineVerify(byte[] sigBytes) throws SignatureException {
return verify(sigBytes, buffer.toByteArray(), ECUtil.toX962Uncompressed(verifyKey.getW(), params), params);
}
@Override
@Deprecated
protected void engineSetParameter(String param, Object value) throws InvalidParameterException {
throw new UnsupportedOperationException("setParameter() not supported");
}
@Override
@Deprecated
protected Object engineGetParameter(String param) throws InvalidParameterException {
throw new UnsupportedOperationException("getParameter() not supported");
}
abstract byte[] sign(byte[] data, byte[] privkey, ECParameterSpec params);
abstract boolean verify(byte[] signature, byte[] data, byte[] pubkey, ECParameterSpec params);
public static class TomCryptRaw extends NativeSignatureSpi {
@Override
native byte[] sign(byte[] data, byte[] privkey, ECParameterSpec params);
@Override
native boolean verify(byte[] signature, byte[] data, byte[] pubkey, ECParameterSpec params);
}
public static class Botan extends NativeSignatureSpi {
@Override
native byte[] sign(byte[] data, byte[] privkey, ECParameterSpec params);
@Override
native boolean verify(byte[] signature, byte[] data, byte[] pubkey, ECParameterSpec params);
}
}
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