PKCS7 Decrypt MIME

Loads a PKCS7 encrypted MIME file and decrypts.

 Chilkat Java Library Downloads for Windows, Linux, and MAC OS X

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[])
  {
    CkMime mime = new CkMime();

    boolean success;
    success = mime.UnlockComponent("Anything for 30-day trial.");
    if (success == false) {
        System.out.println(mime.lastErrorText());
        return;
    }

    //  Load the MIME
    success = mime.LoadMimeFile("encrypted.mim");
    if (success == false) {
        System.out.println(mime.lastErrorText());
        return;
    }

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

    //  Display the decrypted MIME:
    System.out.println(mime.getMime());

    //  How is it possible to magically decrypt with no information?
    //  Answer: It is possible to decrypt if the certificate with private key
    //  needed for decryption was previously installed onto the
    //  Windows computer.  PKCS7 encrypted (enveloped) data always
    //  includes information about the certificate required for
    //  decryption.  Chilkat uses it to automatically search the
    //  Windows registry-based certificate stores to find the
    //  certificate.

    //  If the certificate required for decryption was not installed, but
    //  you have a PFX file containing the cert + private key,
    //  then it may be used like this:

    //  The AddPfxSourceFile and/or AddPfxSourceData
    //  methods may be called one or more times (one per PFX)
    //  to add sources from which the MIME component will
    // search for certificates and private keys when decrypting.
    String pfxPassword;
    pfxPassword = "myPassword";
    success = mime.AddPfxSourceFile("myCertAndPrivateKey.pfx",pfxPassword);
    if (success == false) {
        System.out.println(mime.lastErrorText());
        return;
    }

    //  Now call Decrypt, and it will search the PFX sources
    //  previously added...

  }
}