(Java) 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 Java Downloads Java Libs for Windows, MacOS, Linux, Alpine Linux, Solaris Java Libs for Android

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[])
  {
    // 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) {
        System.out.println(cert.lastErrorText());
        return;
        }

    // Provide the signing cert (with associated private key).
    success = crypt.SetSigningCert(cert);
    if (success != true) {
        System.out.println(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) {
        System.out.println(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) {
        System.out.println(encryptCert.lastErrorText());
        return;
        }

    crypt.put_CryptAlgorithm("pki");

    success = crypt.SetEncryptCert(encryptCert);
    if (success != true) {
        System.out.println(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) {
        System.out.println(crypt.lastErrorText());
        return;
        }

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