SignPKCS7.java

Example of PKCS#7 signature.

See Note on examples.

package doxy.examples;
 
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
 
import com.dinamonetworks.Dinamo;
 
import br.com.trueaccess.TacException;
import br.com.trueaccess.TacNDJavaLib;
 
public class SignPKCS7 {
 
    public static void main(String[] args) throws TacException {
 
        Dinamo api = new Dinamo();
        api.openSession("127.0.0.1", "master", "12345678", false);
 
        String keyId = "lab";
        String certId = "lab_cert";
 
        /*
         * Data to be signed.
         * */
        String content = "PKCS#7 signature test";
 
        /*
         * Generates a separate signature for the file.
         */
        byte[] signature = api.signPKCS7(keyId, certId, null, 0, content.getBytes());
 
        Path sigFile = Paths.get("c:\\tmp\\signature.p7s");
        try {
            Files.write(sigFile, signature);
        } catch (IOException e) {
            e.printStackTrace();
            System.exit(1);
        }
 
        System.out.println("PKCS#7 signature generated successfully.");
 
        /*
         * Generates a co-signature.
         * */
        byte[] cosignSignature = api.signPKCS7(keyId,
                                               certId,
                                               null,
                                               TacNDJavaLib.TAC_MOD_CORE_P7_COSIGN |
                                               TacNDJavaLib.TAC_MOD_CORE_P7_DETACHED,
                                               signature);
 
        Path cosignFile = Paths.get("c:\\tmp\\co_signature.p7s");
        try {
            Files.write(cosignFile, cosignSignature);
        } catch (IOException e) {
            e.printStackTrace();
            System.exit(1);
        }
 
        System.out.println("PKCS#7 co-signature generated successfully.");
 
        api.closeSession();
    }
 
}