Java

Add a PFX Source to MailMan for Decryption

Demonstrates the Chilkat MailMan.AddPfxSourceFile method, which adds a PFX/PKCS#12 file to the MailMan object's internal list of sources used for locating certificates and private keys — for example, to decrypt S/MIME email downloaded from the server. The second argument is the PFX password. This example configures a POP3 connection and registers a PFX source.

Background: When MailMan downloads an encrypted (S/MIME) message, it needs the recipient's private key to decrypt it. On Windows and macOS the OS certificate stores are searched automatically, but when the key lives in a standalone PFX file — common on Linux or in server deployments — AddPfxSourceFile tells MailMan where to find it. A PFX bundles the certificate and its private key in one password-protected file.

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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;

    //  Demonstrates the MailMan.AddPfxSourceFile method, which adds a PFX/PKCS#12 file to the
    //  MailMan object's internal list of sources used for locating certificates and private
    //  keys (for example, to decrypt downloaded S/MIME email).  The 2nd argument is the PFX
    //  password.

    CkMailMan mailman = new CkMailMan();

    //  Configure the POP3 server connection.
    mailman.put_MailHost("pop.example.com");
    mailman.put_MailPort(995);
    mailman.put_PopSsl(true);
    mailman.put_PopUsername("user@example.com");
    mailman.put_PopPassword("myPassword");

    //  Provide a PFX so that encrypted emails downloaded from the server can be decrypted.

    success = mailman.AddPfxSourceFile("qa_data/certs/decryption.pfx","pfx_password");
    if (success == false) {
        System.out.println(mailman.lastErrorText());
        return;
        }

    System.out.println("Added the PFX certificate/private-key source.");

    //  Note: The path "qa_data/certs/decryption.pfx" is a relative local filesystem path,
    //  relative to the current working directory of the running application.
  }
}