Different Encoders Provided Different Encoded Values

Question

Pardon me! I am weak in java.

I am referring the stackoverflow post: Digital Signature Creation and Verification. I added the Base64 Encoders of Bouncy Castle and Apache. They return the some differemt strings like ([B@a470b8,[B@1e4457d,[B@10b4b2f, [B@750159..). "sun.misc.BASE64Encoder" returns properly encoded. But, it is restricted. Please advise how to use Bouncy Castle Base64 or Apache Bas64 classes. Thanks in Advance!

My Code and Results as follows:

package abc;

import java.io.FileInputStream;<br>
import java.security.Key;<br>
import java.security.KeyStore;<br>
import java.security.PrivateKey;<br>
import java.security.Security;<br>
import java.security.Signature;<br>
import java.security.cert.X509Certificate;<br>
import java.util.ArrayList;<br>
import java.util.List;<br>
import org.apache.pdfbox.pdfwriter.COSWriter;<br>
import org.bouncycastle.cert.jcajce.JcaCertStore;<br>
import org.bouncycastle.cms.CMSProcessableByteArray;<br>
import org.bouncycastle.cms.CMSSignedData;<br>
import org.bouncycastle.cms.CMSSignedDataGenerator;<br>
import org.bouncycastle.cms.CMSTypedData;<br>
import org.bouncycastle.cms.jcajce.JcaSignerInfoGeneratorBuilder;<br>
import org.bouncycastle.jce.provider.BouncyCastleProvider;<br>
import org.bouncycastle.operator.ContentSigner;<br>
import org.bouncycastle.operator.jcajce.JcaContentSignerBuilder;<br>
import org.bouncycastle.operator.jcajce.JcaDigestCalculatorProviderBuilder;<br>
import org.bouncycastle.util.Store;<br>
import sun.misc.BASE64Encoder;<br>

public class GenerateSignature {
public static void main(String[] args) throws Exception {
    String KEYSTORE_FILE = "resources/my.p12";
    String KEYSTORE_INSTANCE = "PKCS12";
    String KEYSTORE_PWD = "password";
    String KEYSTORE_ALIAS = "signCert";
    String text = "This is a message";

    Security.addProvider(new BouncyCastleProvider());
    KeyStore ks = KeyStore.getInstance(KEYSTORE_INSTANCE);
    ks.load(new FileInputStream(KEYSTORE_FILE), KEYSTORE_PWD.toCharArray());
    Key key = ks.getKey(KEYSTORE_ALIAS, KEYSTORE_PWD.toCharArray());
    //Sign
    PrivateKey privKey = (PrivateKey) key;
    Signature signature = Signature.getInstance("SHA1WithRSA", "BC");
    signature.initSign(privKey);
    signature.update(text.getBytes());

    //Build CMS
    X509Certificate cert = (X509Certificate) ks.getCertificate(KEYSTORE_ALIAS);
    List certList = new ArrayList();
    CMSTypedData msg = new CMSProcessableByteArray(signature.sign());
    certList.add(cert);
    Store certs = new JcaCertStore(certList);
    CMSSignedDataGenerator gen = new CMSSignedDataGenerator();
    ContentSigner sha1Signer = new JcaContentSignerBuilder("SHA1withRSA").setProvider("BC").build(privKey);
    gen.addSignerInfoGenerator(new JcaSignerInfoGeneratorBuilder(new JcaDigestCalculatorProviderBuilder().setProvider("BC").build()).build(sha1Signer, cert));
    gen.addCertificates(certs);
    CMSSignedData sigData = gen.generate(msg, false);

    BASE64Encoder encoder = new BASE64Encoder();

    System.out.println("================Start : Signed Content Using Sun BASE64Encoder=================================================================================");
    String signedContent = encoder.encode((byte[]) sigData.getSignedContent().getContent());
    System.out.println("Signed content: " + signedContent.toString());
    System.out.println("================End : Signed Content Using Sun BASE64Encoder=================================================================================");
    System.out.println("");
    System.out.println("================Start : Signed Encoded Content Using Sun BASE64Encoder=================================================================================");
    String envelopedData = encoder.encode(sigData.getEncoded());
    System.out.println("Enveloped data: " + envelopedData.toString());
    System.out.println("================End : Signed Encoded Content Using Sun BASE64Encoder=================================================================================");
    System.out.println("");
    System.out.println("");

    //Base64 bcEncoderDecoder = new Base64();
    System.out.println("================Start : Signed Content Using Bouncy Castle BASE64=================================================================================");
    byte[] bcSignedContent = org.bouncycastle.util.encoders.Base64.encode((byte[]) sigData.getSignedContent().getContent());
    System.out.println("Signed content: " + bcSignedContent.toString());
    System.out.println("================End : Signed Content Using Bouncy Castle BASE64=================================================================================");
    System.out.println("");
    System.out.println("================Start : Signed Encoded Content Using Bouncy Castle BASE64=================================================================================");
    byte[] bcEnvelopedData = org.bouncycastle.util.encoders.Base64.encode(sigData.getEncoded());
    System.out.println("Enveloped data: " + bcEnvelopedData.toString());
    System.out.println("================End : Signed Encoded Content Using Bouncy Castle BASE64=================================================================================");
    System.out.println("");
    System.out.println("");

    //Base64 apEncoderDecoder = new Base64();
    System.out.println("================Start : Signed Content Using Apache BASE64=================================================================================");
    byte[] apSignedContent = org.apache.commons.codec.binary.Base64.encodeBase64((byte[]) sigData.getSignedContent().getContent());
    System.out.println("Signed content: " + apSignedContent.toString());
    System.out.println("================End : Signed Content Using Apache BASE64=================================================================================");
    System.out.println("");
    System.out.println("================Start : Signed Encoded Content Using Apache BASE64=================================================================================");
    byte[] apEnvelopedData = org.apache.commons.codec.binary.Base64.encodeBase64(sigData.getEncoded());
    System.out.println("Enveloped data: " + apEnvelopedData.toString());
    System.out.println("================End : Signed Encoded Content Using Apache BASE64=================================================================================");
    System.out.println("");
    System.out.println("");

}

}

Output
================Sun BASE64Encoder=========================================================
Signed content:     Se4JKZuREHmSfxMu3ffB7+bke17g15CKB9IOoNYJ7EFphuvoibD8j/WSydVBDtX0PLWjSsNHLFE6
BZCmhZVeBGju8l7rnkBH9ceBT3x6lQpFvVup16topNNGidfFA4gE97JA2+dco5VtIz15ltV6nit8
ktGFjgscyGlKBxgoWok=

Enveloped data: MIAGCSqGSIb3DQEHAqCAMIACAQExCzAJBgUrDgMCGgUAMIAGCSqGSIb3DQEHAQAAoIAwggGUMIH+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================End :Sun BASE64Encoder Results ==========================================

================Start : Bouncy Castle BASE64 Encoding =====================================
Signed content: [B@a470b8<br>
Enveloped data: [B@1e4457d<br>
================End : Bouncy Castle BASE64 Encoding =====================================

================Start : Apache BASE64 Encoding =====================================
Signed content: [B@10b4b2f
Enveloped data: [B@750159
================End : Apache BASE64 Encoding =====================================

Answer 1

The Base64 Encoders of Bouncy Castle and Apache return the encoded data (even though they consist only of ASCII characters) as byte arrays (which you know, after all you have used byte[] as type for these information).

If you want to output the contents in readable form, you should not do XXX.toString() (because this only result in [B@a470b8,[B@1e4457d,[B@10b4b2f, [B@750159, i.e. the type identifier [B and a memory address) but instead new String(XXX), e.g. instead of

System.out.println("Signed content: " + bcSignedContent.toString());

use

System.out.println("Signed content: " + new String(bcSignedContent));