Example usage for org.bouncycastle.cms.jcajce JcaSimpleSignerInfoGeneratorBuilder setUnsignedAttributeGenerator

Introduction

In this page you can find the example usage for org.bouncycastle.cms.jcajce JcaSimpleSignerInfoGeneratorBuilder setUnsignedAttributeGenerator.

Prototype

public JcaSimpleSignerInfoGeneratorBuilder setUnsignedAttributeGenerator(
            CMSAttributeTableGenerator unsignedGen) 

Source Link

Usage

From source file:org.votingsystem.signature.util.PDFContentSigner.java

License:Open Source License

public CMSSignedData genSignedData(byte[] signatureHash, CMSAttributeTableGenerator unsAttr) throws Exception {
    CMSProcessable content = new CMSProcessableByteArray(signatureHash);
    ByteArrayOutputStream out = null;
    if (content != null) {
        out = new ByteArrayOutputStream();
        content.write(out);//from w  w w.jav a 2s.  co m
        out.close();
    }
    ByteArrayInputStream bais = new ByteArrayInputStream(out.toByteArray());
    MessageDigest softwareDigestEngine = MessageDigest.getInstance(signatureDigestAlg);
    int bytesRead;
    byte[] dataBuffer = new byte[4096];
    while ((bytesRead = bais.read(dataBuffer)) >= 0) {
        softwareDigestEngine.update(dataBuffer, 0, bytesRead);
    }
    byte[] hash = softwareDigestEngine.digest();
    CertStore certsAndCRLs = CertStore.getInstance(CERT_STORE_TYPE,
            new CollectionCertStoreParameters(Arrays.asList(signerCertChain)), ContextVS.PROVIDER);
    addCertificatesAndCRLs(certsAndCRLs);
    CMSAttributeTableGenerator sAttr = new DefaultSignedAttributeTableGenerator();
    ASN1ObjectIdentifier contentTypeOID = new ASN1ObjectIdentifier(CMSSignedGenerator.DATA);
    Map parameters = getBaseParameters(contentTypeOID,
            new AlgorithmIdentifier(new DERObjectIdentifier(pdfDigestObjectIdentifier), new DERNull()), hash);
    AttributeTable attributeTable = sAttr.getAttributes(Collections.unmodifiableMap(parameters));
    //String signatureHashStr = new String(Base64.encode(signatureHash));
    JcaSimpleSignerInfoGeneratorBuilder jcaSignerInfoGeneratorBuilder = new JcaSimpleSignerInfoGeneratorBuilder();
    jcaSignerInfoGeneratorBuilder = jcaSignerInfoGeneratorBuilder.setProvider(ContextVS.PROVIDER);
    jcaSignerInfoGeneratorBuilder.setSignedAttributeGenerator(attributeTable);
    jcaSignerInfoGeneratorBuilder.setUnsignedAttributeGenerator(unsAttr);
    SignerInfoGenerator signerInfoGenerator = jcaSignerInfoGeneratorBuilder.build(signatureMechanism,
            privateKey, userCert);
    SignerInfo signerInfo = signerInfoGenerator.generate(contentTypeOID);
    List<SignerInfo> signerInfoList = new ArrayList<SignerInfo>();
    signerInfoList.add(signerInfo);
    log.info(" -- userCert: " + userCert.getSubjectDN().getName());
    CMSSignedData signedData = getCMSSignedData(CMSSignedGenerator.DATA, content, true,
            CMSUtils.getProvider("BC"), true, signerInfoList);
    return signedData;
}

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