Handling incorrect document password exception

Signature class supports handling incorrect password passed to open protected documents over class IncorrectPasswordException.

Here are the steps to handle incorrect password exception when working with protected documents with GroupDocs.Signature:

Create new instance of Signature class and pass source document path or stream as a constructor parameter.
Cover the code that works with Signature object methods (sign, verify, search, update, delete) with try - catch block including catching IncorrectPasswordException exception.

Handling incorrect password exception

Following example demonstrates how to handle incorrect password exception.

// initialize LoadOptions with incorrect Password
LoadOptions loadOptions = new LoadOptions();
loadOptions.setPassword("1");
Signature signature = new Signature("ProtectedPwd.pdf", loadOptions);
 
try
{
    QrCodeSignOptions options = new QrCodeSignOptions("JohnSmith");
    options.setEncodeType(QrCodeTypes.QR);
    options.setLeft(100);
    options.setTop(100);
    // try to sign document to file, we expect for PasswordRequiredException
    signature.sign(outputFilePath, options);
    System.out.print("\nSource document signed successfully.\nFile saved at " + outputFilePath);
}
catch (IncorrectPasswordException ex)
{
    System.out.print("HandlingIncorrectPasswordException: " + ex.getMessage());
}
catch (GroupDocsSignatureException ex)
{
    System.out.print("Common GroupDocsSignatureException: " + ex.getMessage());
}
catch (java.lang.RuntimeException ex)
{
    System.out.print("Common Exception happens only at user code level: " + ex.getMessage());
}

More resources

GitHub Examples

You may easily run the code above and see the feature in action in our GitHub examples:

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Handling exceptions Handling password required exception