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package org.spongycastle.pkcs.jcajce;
import java.io.OutputStream;
import java.security.Provider;
import javax.crypto.Mac;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.PBEKeySpec;
import javax.crypto.spec.PBEParameterSpec;
import org.spongycastle.asn1.ASN1ObjectIdentifier;
import org.spongycastle.asn1.DERNull;
import org.spongycastle.asn1.pkcs.PKCS12PBEParams;
import org.spongycastle.asn1.x509.AlgorithmIdentifier;
import org.spongycastle.crypto.generators.PKCS12ParametersGenerator;
import org.spongycastle.jcajce.DefaultJcaJceHelper;
import org.spongycastle.jcajce.JcaJceHelper;
import org.spongycastle.jcajce.NamedJcaJceHelper;
import org.spongycastle.jcajce.ProviderJcaJceHelper;
import org.spongycastle.jcajce.io.MacOutputStream;
import org.spongycastle.operator.GenericKey;
import org.spongycastle.operator.MacCalculator;
import org.spongycastle.operator.OperatorCreationException;
import org.spongycastle.pkcs.PKCS12MacCalculatorBuilder;
import org.spongycastle.pkcs.PKCS12MacCalculatorBuilderProvider;
public class JcePKCS12MacCalculatorBuilderProvider
implements PKCS12MacCalculatorBuilderProvider
{
private JcaJceHelper helper = new DefaultJcaJceHelper();
public JcePKCS12MacCalculatorBuilderProvider()
{
}
public JcePKCS12MacCalculatorBuilderProvider setProvider(Provider provider)
{
this.helper = new ProviderJcaJceHelper(provider);
return this;
}
public JcePKCS12MacCalculatorBuilderProvider setProvider(String providerName)
{
this.helper = new NamedJcaJceHelper(providerName);
return this;
}
public PKCS12MacCalculatorBuilder get(final AlgorithmIdentifier algorithmIdentifier)
{
return new PKCS12MacCalculatorBuilder()
{
public MacCalculator build(final char[] password)
throws OperatorCreationException
{
final PKCS12PBEParams pbeParams = PKCS12PBEParams.getInstance(algorithmIdentifier.getParameters());
try
{
final ASN1ObjectIdentifier algorithm = algorithmIdentifier.getAlgorithm();
final Mac mac = helper.createMac(algorithm.getId());
SecretKeyFactory keyFact = helper.createSecretKeyFactory(algorithm.getId());
PBEParameterSpec defParams = new PBEParameterSpec(pbeParams.getIV(), pbeParams.getIterations().intValue());
PBEKeySpec pbeSpec = new PBEKeySpec(password);
SecretKey key = keyFact.generateSecret(pbeSpec);
mac.init(key, defParams);
return new MacCalculator()
{
public AlgorithmIdentifier getAlgorithmIdentifier()
{
return new AlgorithmIdentifier(algorithm, pbeParams);
}
public OutputStream getOutputStream()
{
return new MacOutputStream(mac);
}
public byte[] getMac()
{
return mac.doFinal();
}
public GenericKey getKey()
{
return new GenericKey(getAlgorithmIdentifier(), PKCS12ParametersGenerator.PKCS12PasswordToBytes(password));
}
};
}
catch (Exception e)
{
throw new OperatorCreationException("unable to create MAC calculator: " + e.getMessage(), e);
}
}
public AlgorithmIdentifier getDigestAlgorithmIdentifier()
{
return new AlgorithmIdentifier(algorithmIdentifier.getAlgorithm(), DERNull.INSTANCE);
}
};
}
}
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