It is fork of https://github.com/greenter/xmldsig, with minor changes to sign requests to UPC.

XmlDSig - Greenter

This library is used to sign requests according to UPC rules.

The certificate in .PEM is required, you can use the following example to convert the .PFX certificate to the required format.

Install

Install using Composer from packagist.

composer require paycore/xmldsig

Example

use Greenter\XMLSecLibs\Sunat\SignedXml;

require 'vendor/autoload.php';

$xmlData = file_get_contents('path-dir/20600995805-01-F001-1.xml');
$certPath = 'path-dir/SFSCert.pem'; // Convertir pfx to pem 

$signer = new SignedXml();
$signer->setCertificateFromFile($certPath); // You can also use $signer->setCertificate ($certData);

$xmlSigned = $signer->signXml($xmlData);

header('Content-Type: text/xml');
echo $xmlSigned;

Resultado:

Before:

<ext:UBLExtensions>
    <ext:UBLExtension>
        <ext:ExtensionContent></ext:ExtensionContent>
    </ext:UBLExtension>
</ext:UBLExtensions>

After:

<ext:UBLExtensions>
    <ext:UBLExtension>
        <ext:ExtensionContent>
            <ds:Signature Id="SignIMM">
                <ds:SignedInfo>
                    <ds:CanonicalizationMethod Algorithm="http://www.w3.org/TR/2001/REC-xml-c14n-20010315"/>
                    <ds:SignatureMethod Algorithm="http://www.w3.org/2000/09/xmldsig#rsa-sha1"/>
                    <ds:Reference URI="">
                    <ds:Transforms>
                        <ds:Transform Algorithm="http://www.w3.org/2000/09/xmldsig#enveloped-signature"/>
                    </ds:Transforms>
                    <ds:DigestMethod Algorithm="http://www.w3.org/2000/09/xmldsig#sha1"/>
                    <ds:DigestValue>IwJuNQGQaHmmm3iv2jj8JDv70Ow=</ds:DigestValue>
                    </ds:Reference>
                </ds:SignedInfo>
                <ds:SignatureValue>
                nLaghokzMNrmrfPnbIg9b........wzZ2CgLTVjWQUAQ4wDAYDVQQIEwVNYWluZTE1UiLFwZXXXPUlf2o=
                </ds:SignatureValue>
                <ds:KeyInfo>
                    <ds:X509Data>
                        <ds:X509Certificate>
                        MIIFhzCCA3OgAwI......MIIEVDCCAzygAwIBAgIJAPTrkMJbCOr1MA0GCSqGSIb3DQEBBQUAMHkxCzAJBgNVBAYTAlVTVQQIEwVNYWluZTEgMOiRJ00nE=
                        </ds:X509Certificate>
                    </ds:X509Data>
                </ds:KeyInfo>
            </ds:Signature>
        </ext:ExtensionContent>
    </ext:UBLExtension>
</ext:UBLExtensions>