(Java) Extract a File from a .p7m (PKCS7 Signed-Data)

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Java example to extract the original file from a .p7m (Signed-Data PKCS7 Format) The .p7m contains the signed contents of the original file. It can be verified and restored by calling VerifyP7M.

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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();

    // What is a .p7m file?

    String outputFile = "/Users/chilkat/testData/pdf/sample.pdf";
    String inFile = "/Users/chilkat/testData/p7m/sample.pdf.p7m";

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

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