signing a xml document with x509 certificate

Question

Every time I try to send a signed XML, the web service verifier rejects it.

To sign the document I just adapted this sample code provided by Microsoft:

http:

Answer 1

It's a long time since this post has been created. I got the same problem with the digital signature can not be validated.

For whom who has the same issue. In my case the difference is XmlDocument.PreserveWhitespace option.

When the PreserveWhitespace = true, the document is not valid when checking against the public key. PreserveWhitespace = false makes the signed XML valid.

I guess that when saving the signed XML to file and sending it to server. There is some space or special characters are inserted to the document and make it invalid.