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GroupDocs.Signature supports verification of documents for different signature types. This approach requires adding all required verification options to a list.
Here are the steps to verify a document for multiple signatures with GroupDocs.Signature:
- Create a new instance of the Signature class and pass the source document path or stream as a constructor parameter.
- Instantiate the required several VerifyOptions objects (BarcodeVerifyOptions, QrCodeVerifyOptions, DigitalVerifyOptions, TextVerifyOptions) and add instances to a list of
List<VerifyOptions>. - Call the Verify method of the Signature class instance and pass the filled list of
List<VerifyOptions>to it.
This example shows how to search for different signature types in the document.
// The path to the documents directory.
const filePath = Constants.SAMPLE_SIGNED_MULTI; // Assuming Constants.SAMPLE_SIGNED_MULTI is defined elsewhere
// Initialize Signature instance
const signature = new signatureLib.Signature(filePath);
// Initialize TextVerifyOptions
const textVerifyOptions = new signatureLib.TextVerifyOptions();
textVerifyOptions.setAllPages(true); // this value is set by default
textVerifyOptions.setText('Text signature');
textVerifyOptions.setSignatureImplementation(signatureLib.TextSignatureImplementation.Native);
textVerifyOptions.setMatchType(signatureLib.TextMatchType.Contains);
// Initialize BarcodeVerifyOptions
const barcVerifyOptions = new signatureLib.BarcodeVerifyOptions();
barcVerifyOptions.setAllPages(true); // this value is set by default
barcVerifyOptions.setText('12345');
barcVerifyOptions.setMatchType(signatureLib.TextMatchType.Contains);
// Initialize QrCodeVerifyOptions
const qrcdVerifyOptions = new signatureLib.QrCodeVerifyOptions();
qrcdVerifyOptions.setAllPages(true); // this value is set by default
qrcdVerifyOptions.setText('John');
qrcdVerifyOptions.setMatchType(signatureLib.TextMatchType.Contains);
// Initialize DigitalVerifyOptions
const digtVerifyOptions = new signatureLib.DigitalVerifyOptions();
digtVerifyOptions.setPassword('1234567890');
// Verify document signatures
const javaArray = java.newInstanceSync("java.util.ArrayList")
javaArray.add(textVerifyOptions);
javaArray.add(barcVerifyOptions);
javaArray.add(qrcdVerifyOptions);
javaArray.add(digtVerifyOptions);
const result = signature.verify(javaArray);
if (result.isValid()) {
console.log('\nDocument was verified successfully!');
} else {
console.log('\nDocument failed the verification process.');
}
You may easily run the code above and see the feature in action in our GitHub examples:
- GroupDocs.Signature for .NET examples, plugins, and showcase
- GroupDocs.Signature for Java examples, plugins, and showcase
- Document Signature for .NET MVC UI Example
- Document Signature for .NET App WebForms UI Example
- Document Signature for Java App Dropwizard UI Example
- Document Signature for Java Spring UI Example
Along with the full-featured .NET library, we provide simple but powerful free online apps.
To sign PDF, Word, Excel, PowerPoint, and other documents you can use the online apps from the GroupDocs.Signature App Product Family.
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