需要使用 TCPDF 在 PHP 中进行数字签名方面的帮助

Question

我目前正在致力于使用 TCPDF 在 PHP 中实现数字签名，以签署和导出 PDF 格式的文档。但是，当我尝试在 Adobe 等平台上验证签名的 PDF 时，遇到错误，指出数字签名无效。

我正在尝试使用此代码，但生成的 pdf 未经过验证。

<?php

require_once "vendor/autoload.php";

use setasign\Fpdi\Tcpdf\Fpdi;

// HTML content to be signed
$htmlContent =
    "<h1>Hello World!</h1><p>This is a digitally signed document.</p>";

//  private key and certificate
$privateKey =
    "/home/newkabir/public_html/docuSign/certificates/ankitpanwar.pkey";
$certificate =
    "/home/newkabir/public_html/docuSign/certificates/ankitpanwar.cer";

// Create a signature
$signature = null;

openssl_pkcs7_sign(
    null,
    null,
    $htmlContent,
    [$certificate, $privateKey],
    $signature,
    PKCS7_BINARY | PKCS7_DETACHED
);

echo "signature is :- " . $signature . "</br>";
// Sign and export HTML content to PDF
signAndExportToPDF($htmlContent . $signature, $privateKey, $certificate);

// Function to sign and export the HTML content to a PDF
function signAndExportToPDF($htmlContent, $privateKey, $certificate)
{
    $pdf = new Fpdi();
    $pdf->AddPage();

    // Add HTML content
    $pdf->writeHTML($htmlContent);

    // Add a digital signature field
    $pdf->setSignature($privateKey, $certificate, "", "", 2, [
        "Name" => "ankit panwar",
        "Location" => "ajmer",
        "Reason" => "for demo purpose",
    ]);

    // Output the signed PDF
    $pdf->Output(
        "/home/newkabir/public_html/docuSign/signed_documentnewrsldkj.pdf",
        "F"
    );

    echo "PDF signed and exported successfully.";
}

Answer 1

为我工作：

$privateKeyPassword = env('DEVELOPMENT_PRIVATE_KEY_PASSWORD');
$certificatePath = 'file://' . realpath(Storage::path('certs/certificate.crt'));
$privateKeyPath = 'file://' . realpath(Storage::path('certs/private.key'));

       
$pdf->setSignature($certificatePath, $privateKeyPath, $privateKeyPassword, '', 2, $info);

Laravel 版本：11.22.0

setasign/fpdi 版本：2.6

PHP版本：8.2