c# - How to edit permissions on CryptoKeySecurity? -

i have posted no luck since have more information thought try again hope can help. reading xml file , verifying fact has been signed. code works when run adminitrator not network service, final line resolves 'true' when not run admin doesnt.

note: not problem reading xml file opens fine. problem 1 of objects in memory. 'think' problem access control lists on cryptokeyrights object.

i have used following (in below code) try , grant access cspparams object:

cryptokeyrights rightsforall = cryptokeyrights.fullcontrol;  cryptokeyaccessrule = new cryptokeyaccessrule(@"everyone", cryptokeyrights.fullcontrol, accesscontroltype.allow);  cspparams.cryptokeysecurity = new cryptokeysecurity();  cspparams.cryptokeysecurity.addaccessrule(everyone); 

the above code

the code is:

// verify signature of xml file against asymmetric  // algorithm , return result.xmldocument doc, rsa key public static boolean verifylicencefile(string xmllicfilepatharg) {     bool isverified = false;      try     {          cspparameters cspparams = new cspparameters();          cspparams.keycontainername = containername;          rsacryptoserviceprovider rsakey = new rsacryptoserviceprovider(cspparams);          // create new xml document.         xmldocument xmldoc = new xmldocument();          // load xml file xmldocument object.         xmldoc.preservewhitespace = true;         xmldoc.load(xmllicfilepatharg);           // check arguments.         if (xmldoc == null)             throw new argumentexception("doc");         if (rsakey == null)             throw new argumentexception("key");          // create new signedxml object , pass         // xml document class.         signedxml signedxml = new signedxml(xmldoc);          // find "signature" node , create new         // xmlnodelist object.         xmlnodelist nodelist = xmldoc.getelementsbytagname("signature");          // throw exception if no signature found.         if (nodelist.count <= 0)         {             throw new cryptographicexception("verification failed: no signature found in document.");         }          // example supports 1 signature         // entire xml document.  throw exception          // if more 1 signature found.         if (nodelist.count >= 2)         {             throw new cryptographicexception("verification failed: more 1 signature found document.");         }          // load first <signature> node.           signedxml.loadxml((xmlelement)nodelist[0]);          // check signature , return result.         isverified = signedxml.checksignature(rsakey);     }     catch (exception ex)     {      }      return isverified;  } 

this sounds more permissions on root ca, or signing cert. i'd check certificates in chain in certificate store - if they're in user store (which explain working under administrator) or machine store (where should work everyone)