(PHP ActiveX) 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.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows Note: The php_com_dotnet.dll may need to be enabled inside of php.ini.

<?php

$success = 0;

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

$crypt = new COM("Chilkat.Crypt2");

// Use a digital certificate and private key from a PFX file (.pfx or .p12).
$pfxPath = 'qa_data/pfx/cert_test123.pfx';
$pfxPassword = 'test123';

$cert = new COM("Chilkat.Cert");
$success = $cert->LoadPfxFile($pfxPath,$pfxPassword);
if ($success == 0) {
    print $cert->LastErrorText . "\n";
    exit;
}

// Provide the signing cert (with associated private key).
$success = $crypt->SetSigningCert($cert);
if ($success == 0) {
    print $crypt->LastErrorText . "\n";
    exit;
}

// Indicate that SHA-256 should be used.
$crypt->HashAlgorithm = 'sha256';

// Specify the signed attributes to be included.
// (This is what makes it CAdES-BES compliant.)
$jsonSignedAttrs = new COM("Chilkat.JsonObject");
$jsonSignedAttrs->UpdateInt('contentType',1);
$jsonSignedAttrs->UpdateInt('signingTime',1);
$jsonSignedAttrs->UpdateInt('messageDigest',1);
$jsonSignedAttrs->UpdateInt('signingCertificateV2',1);
$crypt->SigningAttributes = $jsonSignedAttrs->emit();

$inFile = 'qa_data/xml/IT01234567890_11002.xml';
$sigFile = 'qa_data/fatturapa/signed.p7m';

// Create the CAdES-BES signature, which contains the original data.
$success = $crypt->CreateP7M($inFile,$sigFile);
if ($success == 0) {
    print $crypt->LastErrorText . "\n";
    exit;
}

// Now we'll encrypt what was signed using FatturaPA's certificate (from a PEM file)
$encryptCert = new COM("Chilkat.Cert");
$success = $encryptCert->LoadFromFile('qa_data/certs/fatturapa_cert.pem');
if ($success == 0) {
    print $encryptCert->LastErrorText . "\n";
    exit;
}

$crypt->CryptAlgorithm = 'pki';

$success = $crypt->SetEncryptCert($encryptCert);
if ($success == 0) {
    print $crypt->LastErrorText . "\n";
    exit;
}

// Indicate the underlying bulk encryption algorithm to be used:
$crypt->Pkcs7CryptAlg = 'aes';
$crypt->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 1 to
// use RSAES_OAEP.  (We'll leave it set at the default value of 0)
$crypt->OaepPadding = 0;

// 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 == 0) {
    print $crypt->LastErrorText . "\n";
    exit;
}

print 'Success.' . "\n";

?>