Java Requires Chilkat v10.1.2+

Create PKCS7 Signed File (.p7m)

See more Encryption Examples

Demonstrates how to sign a file to create a .p7m that contains both the file contents and the signature. Chilkat2 Java

import com.chilkatsoft.chilkat2.Cert;
import com.chilkatsoft.chilkat2.CertStore;
import com.chilkatsoft.chilkat2.ChilkatException;
import com.chilkatsoft.chilkat2.Crypt2;
import com.chilkatsoft.chilkat2.JsonObject;

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();

        CertStore certStore = new CertStore();

        // Load a PFX file into a certificate store object.
        try {
            certStore.loadPfxFile("myPfx.pfx", "pfxPassword");
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        // Get the certificate by subject common name.
        // This should be the cert within the PFX that also
        // has a private key (also stored within the PFX).
        JsonObject jsonCN = new JsonObject();
        jsonCN.updateString("CN", "myCert");
        Cert cert = new Cert();
        try {
            certStore.findCert(jsonCN, cert);
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        // Tell the crypt object to use the certificate for signing:
        crypt.setSigningCert(cert);

        // Sign a file, producing a .p7m as output.
        // The input file is unchanged, the test.p7m contains the
        // contents of the input file and the signature.
        String inFile = "test.txt";
        String outFile = "testp7m";
        try {
            crypt.createP7M(inFile, outFile);
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

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