HASH PDF using another algorithm

[DavidBS]

Hi!

Is it possible to adopt another algorithm to HASH a signed document, as demonstrated in https://www.syncfusion.com/forums/152189/how-to-concatenate-the-signed-hash-to-the-original-pdf ?

I mean, SHA512 is too slow!

Would it also be legal to adopt another algorithm, or, for PDF 1/A-3B (and other long-term patterns), should the SHA512 be required?

Thanks a lot for any tip.

[Gowthamraj Kumar]

Hi DavidBS,

We can now set the different message digest algorithm to sign PDF document using the DigestAlgorithm enum available in the class PdfSignatureSettings. Please refer the below documentation link,

UG: https://help.syncfusion.com/file-formats/pdf/working-with-digitalsignature#customize-digestion-algorithm

Blogs: https://www.syncfusion.com/blogs/post/create-validate-pdf-digital-signatures-csharp.aspx#digitally-sign-a-PDF-document-with-an-external-signature

KB (Net core): https://www.syncfusion.com/kb/12957/how-to-externally-sign-a-pdf-document-using-asp-net-core

Please let us know if you need any further assistance in this.

Regards,

Gowthamraj K

[DavidBS]

Thank you very much Gowthamraj, I'll see right now!

Kind regards,

David