Decrypt S/MIME using a Certificate with Private Key Access

See more MIME Examples

Loads a CMS/PKCS #7 encrypted S/MIME message and decrypts it back to the original MIME content.

DecryptUsingCert takes a single certificate that already has access to its associated private key, for example a certificate loaded from a PFX.

The file paths are relative to the application's current working directory. Absolute paths may also be used. Supply the paths appropriate to your own environment.

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;

    CkMime mime = new CkMime();
    success = mime.LoadMimeFile("qa_data/encrypted.eml");
    if (success == false) {
        System.out.println(mime.lastErrorText());
        return;
        }

    //  Decrypt using a certificate that already provides access to its private key (for example loaded
    //  from a PFX).  The only argument is the certificate.
    String pfxPassword = "myPfxPassword";
    CkCert cert = new CkCert();
    success = cert.LoadPfxFile("qa_data/recipient.pfx",pfxPassword);
    if (success == false) {
        System.out.println(cert.lastErrorText());
        return;
        }

    success = mime.DecryptUsingCert(cert);
    if (success == false) {
        System.out.println(mime.lastErrorText());
        return;
        }

    String body = mime.getBodyDecoded();
    if (mime.get_LastMethodSuccess() == false) {
        System.out.println(mime.lastErrorText());
        return;
        }

    System.out.println(body);
  }
}