Java Requires Chilkat v11.0.0+

Duplicate OpensSSL to Sign File and Output Binary DER

See more OpenSSL Examples

This example duplicates the following:

openssl smime -sign -in INPUT.xml -signer SIGN.PEM -passin pass:MYPASS -outform der -binary -nodetach -out SIGNED.P7M

Note: Although "smime" is the OpenSSL command, it's not actually producing S/MIME. The arguments "-outform der -binary" indicates that the output is binary DER (i.e. the PKCS7 binary signature). The input can be any type of file: XML, PDF, JPG, ... *anything*...

Chilkat2 Java

import com.chilkatsoft.chilkat2.Cert;
import com.chilkatsoft.chilkat2.ChilkatException;
import com.chilkatsoft.chilkat2.Crypt2;
import com.chilkatsoft.chilkat2.Pem;
import com.chilkatsoft.chilkat2.PrivateKey;

public class ChilkatExample {

    public static void main(String[] args) {
        // This example requires the Chilkat API to have been previously unlocked.
        // See Global Unlock Sample for sample code.

        Crypt2 crypt = new Crypt2();

        // Load the PEM containing cert + private key.
        Pem pem = new Pem();
        try {
            pem.loadPemFile("qa_data/pem/myPem.pem", "password");
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        PrivateKey privkey = new PrivateKey();
        try {
            pem.privateKeyAt(0, privkey);
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        Cert cert = new Cert();
        try {
            pem.certAt(0, cert);

            crypt.setSigningCert2(cert, privkey);
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        // Alternatively, we could use a .pfx/.p12 file.
        // (Chilkat also supports other formats/sources for cert/private keys...)
        Cert certFromP12 = new Cert();
        try {
            certFromP12.loadPfxFile("qa_data/p12/myP12.p12", "password");

            // The certificate, when loaded from a .pfx/.p12, will automatically
            // include the associated private key, assuming it's present in the .p12.
            // We don't have to explicitly provide the private key as in the
            // lines of code above that use the PEM file.
            crypt.setSigningCert(certFromP12);

            // Create the opaque signature (PKCS7 binary DER that contains both the signature and original file data).
            crypt.createP7M("qa_data/infile.anything", "qa_output/outfile.p7m");
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        System.out.println("Success.");
    }
}