dll for digital signing

Need dll for digital sign [login to view URL] dll must put <ds:Signature> tag in [login to view URL] signing algorithm can be RSA or DSA and ds prefix is mandatory. Here are example <ds:Signature xmlns:ds="[login to view URL]"> <ds:SignedInfo> <ds:CanonicalizationMethod Algorithm="[login to view URL]" /> <ds:SignatureMethod Algorithm="[login to view URL]" /> <ds:Reference URI=""> <ds:Transforms> <ds:Transform Algorithm="[login to view URL]" /> <ds:Transform Algorithm="[login to view URL]" /> </ds:Transforms> <ds:DigestMethod Algorithm="[login to view URL]" /> <ds:DigestValue>khBYs..=</ds:DigestValue> </ds:Reference> </ds:SignedInfo> <ds:SignatureValue>XBv9..==</ds:SignatureValue> <ds:KeyInfo> <ds:X509Data> <ds:X509Certificate>c8K9s..=</ds:X509Certificate> </ds:X509Data> <ds:KeyValue> <ds:DSAKeyValue> <ds:P>/X9Tg.. =</ds:P> <ds:Q>l2BQ..=</ds:Q> <ds:G>9+Gg..=</ds:G> <ds:Y>urTf..=</ds:Y> </ds:DSAKeyValue> </ds:KeyValue> </ds:KeyInfo> </ds:Signature> If you can't do this please don't [login to view URL] take project and say that everything is ready and after that aborted project and i can't give them bad [login to view URL] return my 30 usd that take for project.