(Java) Extract PKCS7 from MIME and Decrypt

Extracts the base64-encoded PKCS7 body of a MIME message to a file, and then decrypts using Chilkat Crypt2.

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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[])
  {
    // This example assumes the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    CkMime mime = new CkMime();

    boolean success = mime.LoadMimeFile("c:/aaworkarea/EmailInBytes.txt");
    if (success != true) {
        System.out.println(mime.lastErrorText());
        return;
        }

    success = mime.SaveBody("c:/aaworkarea/smime.p7m");
    if (success != true) {
        System.out.println(mime.lastErrorText());
        return;
        }

    CkCrypt2 crypt = new CkCrypt2();

    success = crypt.AddPfxSourceFile("c:/aaworkarea/my.pfx","pfxPassword");
    if (success == false) {
        System.out.println(crypt.lastErrorText());
        return;
        }

    // Indicate the public-key (PKCS7) encryption/decryption should be used:
    crypt.put_CryptAlgorithm("pki");

    String inPath = "c:/aaworkarea/smime.p7m";
    String outPath = "c:/aaworkarea/decrypted.dat";

    success = crypt.CkDecryptFile(inPath,outPath);
    if (success == false) {
        System.out.println(crypt.lastErrorText());
        return;
        }

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