Example usage for org.bouncycastle.cms SignerInfoGenerator getCalculatedDigest

Introduction

In this page you can find the example usage for org.bouncycastle.cms SignerInfoGenerator getCalculatedDigest.

Prototype

public byte[] getCalculatedDigest() 

Source Link

Usage

From source file:net.jsign.asn1.authenticode.AuthenticodeSignedDataGenerator.java

License:Apache License

public CMSSignedData generate(ASN1ObjectIdentifier contentTypeOID, ASN1Encodable content)
        throws CMSException, IOException {
    digests.clear();/* w  w w . j  a va  2s . c o m*/

    SignerInfo signerInfo;

    if (!_signers.isEmpty()) {
        signerInfo = ((SignerInformation) _signers.get(0)).toASN1Structure();
    } else {
        SignerInfoGenerator signerInfoGenerator = (SignerInfoGenerator) signerGens.get(0);

        byte[] signedContent = content.toASN1Primitive().getEncoded("DER");

        OutputStream out = signerInfoGenerator.getCalculatingOutputStream();
        out.write(signedContent, 2, signedContent.length - 2); // skip the first 2 bytes as specified
        out.flush();
        out.close();

        signerInfo = signerInfoGenerator.generate(contentTypeOID);

        byte[] calculatedDigest = signerInfoGenerator.getCalculatedDigest();
        digests.put(signerInfoGenerator.getDigestAlgorithm().getAlgorithm().getId(), calculatedDigest);
    }

    ContentInfo encInfo = new ContentInfo(contentTypeOID, content);
    ASN1Set certificates = new DERSet((ASN1Encodable[]) certs.toArray(new ASN1Encodable[0]));

    ASN1Encodable signedData = new AuthenticodeSignedData(signerInfo.getDigestAlgorithm(), encInfo,
            certificates, signerInfo);

    ContentInfo contentInfo = new ContentInfo(CMSObjectIdentifiers.signedData, signedData);

    return new CMSSignedData(
            new CMSProcessableByteArray(contentTypeOID, content.toASN1Primitive().getEncoded("DER")),
            contentInfo);
}

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