(Java) Decrypt a .p7m File (using a PFX)

Java sample code showing how to decrypt a .p7m using a .p12 / .pfx certificate w/ private key.

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

    CkCrypt2 crypt = new CkCrypt2();

    // Use a digital certificate and private key from a PFX file (.pfx or .p12).
    String pfxPath = "myCertAndKey.pfx";
    String pfxPassword = "test123";

    boolean success = crypt.AddPfxSourceFile(pfxPath,pfxPassword);
    if (success != true) {
        System.out.println(crypt.lastErrorText());
        return;
        }

    // Set the  outPath to whatever is appropriate.
    // If you are decrypting a PDF, your output might be "out.pdf"...
    String inPath = "smime.p7m";
    String outPath = "original.txt";

    // Indicate that we're doing public key decryption (i.e. PKCS7)
    crypt.put_CryptAlgorithm("pki");

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

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