Word document with document protection - Restricted access

[Rajeshrv]

Dear Team,
Am using Aspose.word 22.12 currently, when am trying to access word document which as sensitivity label as internal - am getting an error message as “Unknown file format”

Please use the attached file and try

Aspose.Words.Document anDoc = new Aspose.Words.Document(<filepath>);

Please let me know, how to proceed showing some specific error message instead of showing generic message.
Note: Upon stack trace " at Aspose.Words.DigitalSignatures.DigitalSignatureUtil.a(GK a, String b)" am seeing this message.
Protectedtest.docx (89 KB)

Thank you

[alexey.noskov]

@Rajeshrv Unfortunately, Aspose.Words does not support direct loading of documents protected with sensitivity labels. To load such documents, you should first decrypt it and then feed to Aspose.Words.

[Rajeshrv]

Thank you for quick reply.
Currently I do not have options which could tell me that a particular document is to be decrypted or not. Is there a way in Aspose which could help me to check it at least based on some error messages.

[alexey.noskov]

@Rajeshrv You can use FileFormatUtil to detect encrypted documents. For example:

FileFormatInfo info = FileFormatUtil.DetectFileFormat(@"C:\Temp\in.docx");
Console.WriteLine(info.LoadFormat);
Console.WriteLine(info.IsEncrypted);

[Rajeshrv]

Thank you was able to proceed with the FileFormatInfo check.