Examples with DEROutputStream org.bouncycastle.asn1.DEROutputStream used on opensource projects

Example 21 with DEROutputStream

use of org.bouncycastle.asn1.DEROutputStream in project walle by Meituan-Dianping.

the class V1SchemeSigner method generateSignatureBlock.

private static byte[] generateSignatureBlock(SignerConfig signerConfig, byte[] signatureFileBytes) throws InvalidKeyException, CertificateEncodingException, SignatureException {
    JcaCertStore certs = new JcaCertStore(signerConfig.certificates);
    X509Certificate signerCert = signerConfig.certificates.get(0);
    String jcaSignatureAlgorithm = getJcaSignatureAlgorithm(signerCert.getPublicKey(), signerConfig.signatureDigestAlgorithm);
    try {
        ContentSigner signer = new JcaContentSignerBuilder(jcaSignatureAlgorithm).build(signerConfig.privateKey);
        CMSSignedDataGenerator gen = new CMSSignedDataGenerator();
        gen.addSignerInfoGenerator(new SignerInfoGeneratorBuilder(new JcaDigestCalculatorProviderBuilder().build(), SignerInfoSignatureAlgorithmFinder.INSTANCE).setDirectSignature(true).build(signer, new JcaX509CertificateHolder(signerCert)));
        gen.addCertificates(certs);
        CMSSignedData sigData = gen.generate(new CMSProcessableByteArray(signatureFileBytes), false);
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        try (ASN1InputStream asn1 = new ASN1InputStream(sigData.getEncoded())) {
            DEROutputStream dos = new DEROutputStream(out);
            dos.writeObject(asn1.readObject());
        }
        return out.toByteArray();
    } catch (OperatorCreationException | CMSException | IOException e) {
        throw new SignatureException("Failed to generate signature", e);
    }
}