Example usage for org.bouncycastle.cms SignerInfoGeneratorBuilder SignerInfoGeneratorBuilder

Introduction

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

Prototype

public SignerInfoGeneratorBuilder(DigestCalculatorProvider digestProvider,
        CMSSignatureEncryptionAlgorithmFinder sigEncAlgFinder) 

Source Link

Document

Base constructor with a particular finder for signature algorithms.

Usage

From source file:com.android.apksigner.core.internal.apk.v1.V1SchemeSigner.java

License:Apache License

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 {/*from  w  w w  .  j av a  2 s  .  c  o  m*/
        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);
    }
}

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