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The Bouncy Castle Crypto package is a Java implementation of cryptographic algorithms. This jar contains JCE provider and lightweight API for the Bouncy Castle Cryptography APIs for JDK 1.5 to JDK 1.8 with debug enabled.
package org.bouncycastle.jcajce.provider.asymmetric.ec;
import java.security.AlgorithmParameters;
import java.security.InvalidAlgorithmParameterException;
import java.security.InvalidKeyException;
import java.security.PrivateKey;
import java.security.PublicKey;
import java.security.SignatureException;
import java.security.spec.AlgorithmParameterSpec;
import org.bouncycastle.crypto.CipherParameters;
import org.bouncycastle.crypto.CryptoException;
import org.bouncycastle.crypto.params.ParametersWithID;
import org.bouncycastle.crypto.params.ParametersWithRandom;
import org.bouncycastle.crypto.signers.SM2Signer;
import org.bouncycastle.jcajce.provider.asymmetric.util.ECUtil;
import org.bouncycastle.jcajce.spec.SM2ParameterSpec;
import org.bouncycastle.jcajce.util.BCJcaJceHelper;
import org.bouncycastle.jcajce.util.JcaJceHelper;
public class GMSignatureSpi
extends java.security.SignatureSpi
{
private final JcaJceHelper helper = new BCJcaJceHelper();
private AlgorithmParameters engineParams;
private SM2ParameterSpec paramSpec;
private final SM2Signer signer;
GMSignatureSpi(SM2Signer signer)
{
this.signer = signer;
}
protected void engineInitVerify(PublicKey publicKey)
throws InvalidKeyException
{
CipherParameters param = ECUtils.generatePublicKeyParameter(publicKey);
if (paramSpec != null)
{
param = new ParametersWithID(param, paramSpec.getID());
}
signer.init(false, param);
}
protected void engineInitSign(
PrivateKey privateKey)
throws InvalidKeyException
{
CipherParameters param = ECUtil.generatePrivateKeyParameter(privateKey);
if (appRandom != null)
{
param = new ParametersWithRandom(param, appRandom);
}
if (paramSpec != null)
{
signer.init(true, new ParametersWithID(param, paramSpec.getID()));
}
else
{
signer.init(true, param);
}
}
protected void engineUpdate(byte b)
throws SignatureException
{
signer.update(b);
}
protected void engineUpdate(byte[] bytes, int off, int length)
throws SignatureException
{
signer.update(bytes, off, length);
}
protected byte[] engineSign()
throws SignatureException
{
try
{
return signer.generateSignature();
}
catch (CryptoException e)
{
throw new SignatureException("unable to create signature: " + e.getMessage());
}
}
protected boolean engineVerify(byte[] bytes)
throws SignatureException
{
return signer.verifySignature(bytes);
}
protected void engineSetParameter(
AlgorithmParameterSpec params)
throws InvalidAlgorithmParameterException
{
if (params instanceof SM2ParameterSpec)
{
paramSpec = (SM2ParameterSpec)params;
}
else
{
throw new InvalidAlgorithmParameterException("only SM2ParameterSpec supported");
}
}
protected AlgorithmParameters engineGetParameters()
{
if (engineParams == null)
{
if (paramSpec != null)
{
try
{
engineParams = helper.createAlgorithmParameters("PSS");
engineParams.init(paramSpec);
}
catch (Exception e)
{
throw new RuntimeException(e.toString());
}
}
}
return engineParams;
}
protected void engineSetParameter(
String param,
Object value)
{
throw new UnsupportedOperationException("engineSetParameter unsupported");
}
protected Object engineGetParameter(
String param)
{
throw new UnsupportedOperationException("engineGetParameter unsupported");
}
static public class sm3WithSM2
extends GMSignatureSpi
{
public sm3WithSM2()
{
super(new SM2Signer());
}
}
}
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