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The Bouncy Castle Java APIs for CMS, PKCS, EAC, TSP, CMP, CRMF, OCSP, and certificate generation. This jar contains APIs for JDK 1.5 and up. The APIs can be used in conjunction with a JCE/JCA provider such as the one provided with the Bouncy Castle Cryptography APIs.

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package org.bouncycastle.cert.test;

import java.io.IOException;
import java.security.Security;

import org.bouncycastle.cert.X509CertificateHolder;
import org.bouncycastle.cert.dane.DANEEntry;
import org.bouncycastle.cert.dane.DANEEntryFactory;
import org.bouncycastle.cert.dane.DANEException;
import org.bouncycastle.cert.dane.TruncatingDigestCalculator;
import org.bouncycastle.jce.provider.BouncyCastleProvider;
import org.bouncycastle.util.Arrays;
import org.bouncycastle.util.encoders.Base64;
import org.bouncycastle.util.test.SimpleTest;

public class DANETest
    extends SimpleTest
{
    byte[]  randomCert = Base64.decode(
            "MIIDbDCCAtWgAwIBAgIBADANBgkqhkiG9w0BAQQFADCBtzELMAkGA1UEBhMCQVUx"
                + "ETAPBgNVBAgTCFZpY3RvcmlhMRgwFgYDVQQHEw9Tb3V0aCBNZWxib3VybmUxGjAY"
                + "BgNVBAoTEUNvbm5lY3QgNCBQdHkgTHRkMR4wHAYDVQQLExVDZXJ0aWZpY2F0ZSBB"
                + "dXRob3JpdHkxFTATBgNVBAMTDENvbm5lY3QgNCBDQTEoMCYGCSqGSIb3DQEJARYZ"
                + "d2VibWFzdGVyQGNvbm5lY3Q0LmNvbS5hdTAeFw0wMDA2MDIwNzU1MzNaFw0wMTA2"
                + "MDIwNzU1MzNaMIG3MQswCQYDVQQGEwJBVTERMA8GA1UECBMIVmljdG9yaWExGDAW"
                + "BgNVBAcTD1NvdXRoIE1lbGJvdXJuZTEaMBgGA1UEChMRQ29ubmVjdCA0IFB0eSBM"
                + "dGQxHjAcBgNVBAsTFUNlcnRpZmljYXRlIEF1dGhvcml0eTEVMBMGA1UEAxMMQ29u"
                + "bmVjdCA0IENBMSgwJgYJKoZIhvcNAQkBFhl3ZWJtYXN0ZXJAY29ubmVjdDQuY29t"
                + "LmF1MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDgs5ptNG6Qv1ZpCDuUNGmv"
                + "rhjqMDPd3ri8JzZNRiiFlBA4e6/ReaO1U8ASewDeQMH6i9R6degFdQRLngbuJP0s"
                + "xcEE+SksEWNvygfzLwV9J/q+TQDyJYK52utb++lS0b48A1KPLwEsyL6kOAgelbur"
                + "ukwxowprKUIV7Knf1ajetQIDAQABo4GFMIGCMCQGA1UdEQQdMBuBGXdlYm1hc3Rl"
                + "ckBjb25uZWN0NC5jb20uYXUwDwYDVR0TBAgwBgEB/wIBADA2BglghkgBhvhCAQ0E"
                + "KRYnbW9kX3NzbCBnZW5lcmF0ZWQgY3VzdG9tIENBIGNlcnRpZmljYXRlMBEGCWCG"
                + "SAGG+EIBAQQEAwICBDANBgkqhkiG9w0BAQQFAAOBgQCsGvfdghH8pPhlwm1r3pQk"
                + "msnLAVIBb01EhbXm2861iXZfWqGQjrGAaA0ZpXNk9oo110yxoqEoSJSzniZa7Xtz"
                + "soTwNUpE0SLHvWf/SlKdFWlzXA+vOZbzEv4UmjeelekTm7lc01EEa5QRVzOxHFtQ"
                + "DhkaJ8VqOMajkQFma2r9iA==");

    public String getName()
    {
        return "DANETest";
    }

    private void shouldCreateDANEEntry()
        throws IOException, DANEException
    {
        DANEEntryFactory daneEntryFactory = new DANEEntryFactory(new TruncatingDigestCalculator(new SHA256DigestCalculator()));

        DANEEntry entry = daneEntryFactory.createEntry("[email protected]", new X509CertificateHolder(randomCert));

        if (!DANEEntry.isValidCertificate(entry.getRDATA()))
        {
            fail("encoding error in RDATA");
        }

        if (!"9f86d081884c7d659a2feaa0c55ad015a3bf4f1b2b0b822cd15d6c15._smimecert.test.com".equals(entry.getDomainName()))
        {
            fail("domain name associated with entry wrong");
        }

        byte[] rdata = entry.getRDATA();
        byte[] certData = new byte[rdata.length - 3];

        System.arraycopy(rdata, 3, certData, 0, certData.length);

        if (!Arrays.areEqual(certData, randomCert))
        {
            fail("certificate encoding does not match");
        }
    }

    public void performTest()
        throws Exception
    {
         shouldCreateDANEEntry();
    }

    public static void main(
        String[]    args)
    {
        Security.addProvider(new BouncyCastleProvider());

        runTest(new DANETest());
    }
}