How to Digitally sign XML Document in c#

Asked Dec 14 '18 at 19:53

Active Dec 19 '18 at 09:04

Viewed 458 times

I have a requirement to Sign an XML document, and am not sure where to start.

In a nutshell, we ( a utility company in Italy) must submit an xml doc (invoice copies) and the it must be signed with one of the following two signature formats:

CAdES-BES (CMS Advanced Electronic Signatures) with a structure compliant with the public specifications ETSI TS 101 733 V1.7.4, as provided for in the appropriate legislation starting from 1 September 2010,

XAdES-BES (XML Advanced Electronic Signatures), with a structure compliant with the public specifications ETSI TS 101 903 version 1.4.1, as provided for in the appropriate legislation starting from 1 September 2010. The only method accepted for this type of signature is the “enveloped” method. In addition the XAdES signature must have the Reference element with URI=“” or with URI=“#iddoc” where iddoc is the identity code of the document to be signed: the URI attribute cannot be omitted from the Reference elements.

This is the full spec

Is there a c# library or tool to help get this done?

edited Dec 19 '18 at 09:04

asked Dec 14 '18 at 19:53

Greg Gum

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https://stackoverflow.com/questions/17706020 – Robert Harvey Dec 14 '18 at 19:56
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https://stackoverflow.com/q/2859179 – Robert Harvey Dec 14 '18 at 19:57
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https://www.example-code.com/csharp/cades_bes.asp – Robert Harvey Dec 14 '18 at 19:57
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https://github.com/ctt-gob-es/FirmaXadesNet – Robert Harvey Dec 14 '18 at 20:00
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Seems there's plenty of prior art. I just googled "CAdES-BES c#" and "XAdES-BES". – Robert Harvey Dec 14 '18 at 20:01
@RobertHarvey, thank you so much for helping me get going with this. – Greg Gum Dec 15 '18 at 13:03

How to Digitally sign XML Document in c#

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