Java

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. Java

import com.chilkatsoft.*;

public class ChilkatExample {

  static {
    try {
        System.loadLibrary("chilkat");
    } catch (UnsatisfiedLinkError e) {
      System.err.println("Native code library failed to load.\n" + e);
      System.exit(1);
    }
  }

  public static void main(String argv[])
  {
    boolean success = false;

    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    CkCrypt2 crypt = new CkCrypt2();

    CkCertStore certStore = new CkCertStore();

    // Load a PFX file into a certificate store object.
    success = certStore.LoadPfxFile("myPfx.pfx","pfxPassword");
    if (success != true) {
        System.out.println(certStore.lastErrorText());
        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).
    CkJsonObject jsonCN = new CkJsonObject();
    jsonCN.UpdateString("CN","myCert");
    CkCert cert = new CkCert();
    success = certStore.FindCert(jsonCN,cert);
    if (success == false) {
        System.out.println(certStore.lastErrorText());
        return;
        }

    // Tell the crypt object to use the certificate for signing:
    success = 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";
    success = crypt.CreateP7M(inFile,outFile);
    if (success != true) {
        System.out.println(crypt.lastErrorText());
        return;
        }

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