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package org.bouncycastle.cms.jcajce;
import java.security.PrivateKey;
import java.security.Provider;
import java.security.cert.CertificateEncodingException;
import java.security.cert.X509Certificate;
import org.bouncycastle.asn1.cms.AttributeTable;
import org.bouncycastle.cert.jcajce.JcaX509CertificateHolder;
import org.bouncycastle.cms.CMSAttributeTableGenerator;
import org.bouncycastle.cms.DefaultSignedAttributeTableGenerator;
import org.bouncycastle.cms.SignerInfoGenerator;
import org.bouncycastle.cms.SignerInfoGeneratorBuilder;
import org.bouncycastle.operator.ContentSigner;
import org.bouncycastle.operator.DigestCalculatorProvider;
import org.bouncycastle.operator.OperatorCreationException;
import org.bouncycastle.operator.jcajce.JcaContentSignerBuilder;
import org.bouncycastle.operator.jcajce.JcaDigestCalculatorProviderBuilder;
/**
* Use this class if you are using a provider that has all the facilities you
* need.
* <p>
* For example:
* <pre>
* CMSSignedDataGenerator gen = new CMSSignedDataGenerator();
* ContentSigner sha1Signer = new JcaContentSignerBuilder("SHA1withRSA").setProvider("BC").build(signKP.getPrivate());
*
* gen.addSignerInfoGenerator(
* new JcaSignerInfoGeneratorBuilder(
* new JcaDigestCalculatorProviderBuilder().setProvider("BC").build())
* .build(sha1Signer, signCert));
* </pre>
* becomes:
* <pre>
* CMSSignedDataGenerator gen = new CMSSignedDataGenerator();
*
* gen.addSignerInfoGenerator(
* new JcaSimpleSignerInfoGeneratorBuilder()
* .setProvider("BC")
* .build("SHA1withRSA", signKP.getPrivate(), signCert));
* </pre>
*/
public class JcaSimpleSignerInfoGeneratorBuilder
{
private Helper helper;
private boolean hasNoSignedAttributes;
private CMSAttributeTableGenerator signedGen;
private CMSAttributeTableGenerator unsignedGen;
public JcaSimpleSignerInfoGeneratorBuilder()
throws OperatorCreationException
{
this.helper = new Helper();
}
public JcaSimpleSignerInfoGeneratorBuilder setProvider(String providerName)
throws OperatorCreationException
{
this.helper = new NamedHelper(providerName);
return this;
}
public JcaSimpleSignerInfoGeneratorBuilder setProvider(Provider provider)
throws OperatorCreationException
{
this.helper = new ProviderHelper(provider);
return this;
}
/**
* If the passed in flag is true, the signer signature will be based on the data, not
* a collection of signed attributes, and no signed attributes will be included.
*
* @return the builder object
*/
public JcaSimpleSignerInfoGeneratorBuilder setDirectSignature(boolean hasNoSignedAttributes)
{
this.hasNoSignedAttributes = hasNoSignedAttributes;
return this;
}
public JcaSimpleSignerInfoGeneratorBuilder setSignedAttributeGenerator(CMSAttributeTableGenerator signedGen)
{
this.signedGen = signedGen;
return this;
}
/**
* set up a DefaultSignedAttributeTableGenerator primed with the passed in AttributeTable.
*
* @param attrTable table of attributes for priming generator
* @return this.
*/
public JcaSimpleSignerInfoGeneratorBuilder setSignedAttributeGenerator(AttributeTable attrTable)
{
this.signedGen = new DefaultSignedAttributeTableGenerator(attrTable);
return this;
}
public JcaSimpleSignerInfoGeneratorBuilder setUnsignedAttributeGenerator(CMSAttributeTableGenerator unsignedGen)
{
this.unsignedGen = unsignedGen;
return this;
}
public SignerInfoGenerator build(String algorithmName, PrivateKey privateKey, X509Certificate certificate)
throws OperatorCreationException, CertificateEncodingException
{
ContentSigner contentSigner = helper.createContentSigner(algorithmName, privateKey);
return configureAndBuild().build(contentSigner, new JcaX509CertificateHolder(certificate));
}
public SignerInfoGenerator build(String algorithmName, PrivateKey privateKey, byte[] keyIdentifier)
throws OperatorCreationException, CertificateEncodingException
{
ContentSigner contentSigner = helper.createContentSigner(algorithmName, privateKey);
return configureAndBuild().build(contentSigner, keyIdentifier);
}
private SignerInfoGeneratorBuilder configureAndBuild()
throws OperatorCreationException
{
SignerInfoGeneratorBuilder infoGeneratorBuilder = new SignerInfoGeneratorBuilder(helper.createDigestCalculatorProvider());
infoGeneratorBuilder.setDirectSignature(hasNoSignedAttributes);
infoGeneratorBuilder.setSignedAttributeGenerator(signedGen);
infoGeneratorBuilder.setUnsignedAttributeGenerator(unsignedGen);
return infoGeneratorBuilder;
}
private class Helper
{
ContentSigner createContentSigner(String algorithm, PrivateKey privateKey)
throws OperatorCreationException
{
return new JcaContentSignerBuilder(algorithm).build(privateKey);
}
DigestCalculatorProvider createDigestCalculatorProvider()
throws OperatorCreationException
{
return new JcaDigestCalculatorProviderBuilder().build();
}
}
private class NamedHelper
extends Helper
{
private final String providerName;
public NamedHelper(String providerName)
{
this.providerName = providerName;
}
ContentSigner createContentSigner(String algorithm, PrivateKey privateKey)
throws OperatorCreationException
{
return new JcaContentSignerBuilder(algorithm).setProvider(providerName).build(privateKey);
}
DigestCalculatorProvider createDigestCalculatorProvider()
throws OperatorCreationException
{
return new JcaDigestCalculatorProviderBuilder().setProvider(providerName).build();
}
}
private class ProviderHelper
extends Helper
{
private final Provider provider;
public ProviderHelper(Provider provider)
{
this.provider = provider;
}
ContentSigner createContentSigner(String algorithm, PrivateKey privateKey)
throws OperatorCreationException
{
return new JcaContentSignerBuilder(algorithm).setProvider(provider).build(privateKey);
}
DigestCalculatorProvider createDigestCalculatorProvider()
throws OperatorCreationException
{
return new JcaDigestCalculatorProviderBuilder().setProvider(provider).build();
}
}
}
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