io.aos.crypto.spl09.EncapsulatedSignedDataExample.java Source code

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package io.aos.crypto.spl09;

import java.security.KeyStore;
import java.security.PrivateKey;
import java.security.cert.CertStore;
import java.security.cert.Certificate;
import java.security.cert.CollectionCertStoreParameters;
import java.security.cert.X509Certificate;
import java.util.Arrays;

import org.bouncycastle.cms.CMSProcessable;
import org.bouncycastle.cms.CMSProcessableByteArray;
import org.bouncycastle.cms.CMSSignedData;
import org.bouncycastle.cms.CMSSignedDataGenerator;

public class EncapsulatedSignedDataExample extends SignedDataExample {
    public static void main(String... args) throws Exception {
        KeyStore credentials = Utils.createCredentials();
        PrivateKey key = (PrivateKey) credentials.getKey(Utils.END_ENTITY_ALIAS, Utils.KEY_PASSWD);
        Certificate[] chain = credentials.getCertificateChain(Utils.END_ENTITY_ALIAS);
        CertStore certsAndCRLs = CertStore.getInstance("Collection",
                new CollectionCertStoreParameters(Arrays.asList(chain)), "BC");

        CMSSignedDataGenerator gen = new CMSSignedDataGenerator();

        gen.addSigner(key, (X509Certificate) chain[0], CMSSignedDataGenerator.DIGEST_SHA224);

        gen.addCertificatesAndCRLs(certsAndCRLs);

        // create the signed-data object
        CMSProcessable data = new CMSProcessableByteArray("Hello World!".getBytes());

        CMSSignedData signed = gen.generate(data, true, "BC");

        // recreate
        signed = new CMSSignedData(signed.getEncoded());

        // verification step
        X509Certificate rootCert = (X509Certificate) credentials.getCertificate(Utils.ROOT_ALIAS);

        if (isValid(signed, rootCert)) {
            System.out.println("signed-data verification succeeded");
        } else {
            System.out.println("signed-data verification failed");
        }
    }
}