(Android™) FatturaPA XML Invoice Sign+Encrypt to P7M

Demonstrates how to create a CAdES BES signed + encrypted invoice.xml.p7m for the Italian FatturaPA exchange system.

Note: This example requires Chilkat v9.5.0.75 or greater.

Chilkat Android™ Downloads Android™ Java Libraries Android C/C++ Libraries

// Important: Don't forget to include the call to System.loadLibrary
// as shown at the bottom of this code sample.
package com.test;

import android.app.Activity;
import com.chilkatsoft.*;

import android.widget.TextView;
import android.os.Bundle;

public class SimpleActivity extends Activity {

  private static final String TAG = "Chilkat";

  // Called when the activity is first created.
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    // Note: Requires Chilkat v9.5.0.75 or greater.

    // This 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 = "qa_data/pfx/cert_test123.pfx";
    String pfxPassword = "test123";

    CkCert cert = new CkCert();
    boolean success = cert.LoadPfxFile(pfxPath,pfxPassword);
    if (success != true) {
        Log.i(TAG, cert.lastErrorText());
        return;
        }

    // Provide the signing cert (with associated private key).
    success = crypt.SetSigningCert(cert);
    if (success != true) {
        Log.i(TAG, crypt.lastErrorText());
        return;
        }

    // Indicate that SHA-256 should be used.
    crypt.put_HashAlgorithm("sha256");

    // Specify the signed attributes to be included.
    // (This is what makes it CAdES-BES compliant.)
    CkJsonObject jsonSignedAttrs = new CkJsonObject();
    jsonSignedAttrs.UpdateInt("contentType",1);
    jsonSignedAttrs.UpdateInt("signingTime",1);
    jsonSignedAttrs.UpdateInt("messageDigest",1);
    jsonSignedAttrs.UpdateInt("signingCertificateV2",1);
    crypt.put_SigningAttributes(jsonSignedAttrs.emit());

    String inFile = "qa_data/xml/IT01234567890_11002.xml";
    String sigFile = "qa_data/fatturapa/signed.p7m";

    // Create the CAdES-BES signature, which contains the original data.
    success = crypt.CreateP7M(inFile,sigFile);
    if (success == false) {
        Log.i(TAG, crypt.lastErrorText());
        return;
        }

    // Now we'll encrypt what was signed using FatturaPA's certificate (from a PEM file)
    CkCert encryptCert = new CkCert();
    success = encryptCert.LoadFromFile("qa_data/certs/fatturapa_cert.pem");
    if (success != true) {
        Log.i(TAG, encryptCert.lastErrorText());
        return;
        }

    crypt.put_CryptAlgorithm("pki");

    success = crypt.SetEncryptCert(encryptCert);
    if (success != true) {
        Log.i(TAG, crypt.lastErrorText());
        return;
        }

    // Indicate the underlying bulk encryption algorithm to be used:
    crypt.put_Pkcs7CryptAlg("aes");
    crypt.put_KeyLength(128);

    // There's one last option that could be set.  If is the RSA encryption encryption/padding scheme. 
    // By default, RSAES_PKCS1-V1_5 is used.  If desired, the OaepPadding property could be set to true to
    // use RSAES_OAEP.  (We'll leave it set at the default value of false)
    crypt.put_OaepPadding(false);

    // Everything is specified.  Encrypt the .p7m to create a new .p7m (which adds a layer of encryption around the opaque signature).
    // The output is PKCS7 in binary DER format.
    success = crypt.CkEncryptFile(sigFile,"qa_output/signed_and_encrypted.p7m");
    if (success != true) {
        Log.i(TAG, crypt.lastErrorText());
        return;
        }

    Log.i(TAG, "Success.");

  }

  static {
      System.loadLibrary("chilkat");

      // Note: If the incorrect library name is passed to System.loadLibrary,
      // then you will see the following error message at application startup:
      //"The application <your-application-name> has stopped unexpectedly. Please try again."
  }
}