Soporte para firma XAdES con JavaScript mediante C++
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Introducción
Aspose.Cells ofrece soporte para firmar libros de trabajo con firma XAdES. Para esto, la API proporciona la clase DigitalSignature y la enumeración XAdESType.
Cómo agregar firma XAdES a Excel
El siguiente fragmento de código demuestra el uso de la clase DigitalSignature para firmar el libro de trabajo origen.
<!DOCTYPE html>
<html>
<head>
<title>Aspose.Cells XAdES Signature Example</title>
</head>
<body>
<h1>XAdES Digital Signature Example</h1>
<p>
Select an Excel file and a PFX certificate file (.pfx). Then click "Run Example" to sign the workbook.
</p>
<input type="file" id="fileInput" accept=".xls,.xlsx,.csv" />
<input type="file" id="pfxInput" accept=".pfx" />
<button id="runExample">Run Example</button>
<a id="downloadLink" style="display: none;">Download Result</a>
<div id="result"></div>
</body>
<script src="aspose.cells.js.min.js"></script>
<script type="text/javascript">
const { Workbook, SaveFormat, DigitalSignature, DigitalSignatureCollection, XAdESType, Utils } = AsposeCells;
AsposeCells.onReady({
license: "/lic/aspose.cells.enc",
fontPath: "/fonts/",
fontList: [
"arial.ttf",
"NotoSansSC-Regular.ttf"
]
}).then(() => {
console.log("Aspose.Cells initialized");
});
document.getElementById('runExample').addEventListener('click', async () => {
const fileInput = document.getElementById('fileInput');
const pfxInput = document.getElementById('pfxInput');
const resultDiv = document.getElementById('result');
if (!fileInput.files.length) {
resultDiv.innerHTML = '<p style="color: red;">Please select an Excel file.</p>';
return;
}
if (!pfxInput.files.length) {
resultDiv.innerHTML = '<p style="color: red;">Please select a PFX certificate file.</p>';
return;
}
const file = fileInput.files[0];
const pfxFile = pfxInput.files[0];
// Read Excel file
const arrayBuffer = await file.arrayBuffer();
const workbook = new Workbook(new Uint8Array(arrayBuffer));
// Read PFX file
const pfxArrayBuffer = await pfxFile.arrayBuffer();
const pfxBytes = new Uint8Array(pfxArrayBuffer);
// Create DigitalSignature using PFX bytes, password, signature name and signing time
const signature = new DigitalSignature(pfxBytes, "aspose", "testXAdES", new Date());
// Set XAdES type property (converted from setXAdESType)
signature.xAdESType = AsposeCells.XAdESType.XAdES;
const dsCollection = new DigitalSignatureCollection();
dsCollection.add(signature);
// Assign digital signature collection to workbook (converted from setDigitalSignature)
workbook.digitalSignature = dsCollection;
// Save workbook and provide download link
const outputData = workbook.save(SaveFormat.Xlsx);
const blob = new Blob([outputData]);
const downloadLink = document.getElementById('downloadLink');
downloadLink.href = URL.createObjectURL(blob);
downloadLink.download = 'XAdESSignatureSupport_out.xlsx';
downloadLink.style.display = 'block';
downloadLink.textContent = 'Download Signed Excel File';
resultDiv.innerHTML = '<p style="color: green;">Workbook signed successfully! Click the download link to get the signed file.</p>';
});
</script>
</html>