(Java) Extract XML File from a .p7m (e.g. FATTURA ELETTRONICA, ITALY)

Java example to extract the original file from a .p7m (Signed-Data PKCS7 Format) The .p7m contains the signed contents of the original file.

One use for this example is to extract the XML file from a Fattura Elettronica .p7m signature.

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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();

    String outputFile = "testData/xml/original.xml";
    String inFile = "testData/p7m/fattura_signature.p7m";

    // Verify the signature and extract the XML file.
    boolean success = crypt.VerifyP7M(inFile,outputFile);
    if (success == false) {
        System.out.println(crypt.lastErrorText());
        return;
        }

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