static CryptoKeySecurity GetCspPrivateKeySecurity(SafeCertContextHandle certificate)
{
using (var cspHandle = CertificatePal.GetCspPrivateKey(certificate))
{
var security = new CryptoKeySecurity();
security.SetSecurityDescriptorBinaryForm(CertificatePal.GetCspPrivateKeySecurity(cspHandle), AccessControlSections.Access);
return(security);
}
}
internal static void SetAccessRuleOnKSPKey(CngKey key, string accountName, CryptoKeyRights keyAccessMask)
{
const string NCRYPT_SECURITY_DESCR_PROPERTY = "Security Descr";
const CngPropertyOptions DACL_SECURITY_INFORMATION = (CngPropertyOptions)4;
// retrieve existing permissions
var existingACL = key.GetProperty(NCRYPT_SECURITY_DESCR_PROPERTY, DACL_SECURITY_INFORMATION);
// add new rule
CryptoKeySecurity keySec = new CryptoKeySecurity();
keySec.SetSecurityDescriptorBinaryForm(existingACL.GetValue());
keySec.AddAccessRule(new CryptoKeyAccessRule(accountName, keyAccessMask, AccessControlType.Allow));
// put back
CngProperty updatedACL = new CngProperty(existingACL.Name, keySec.GetSecurityDescriptorBinaryForm(), CngPropertyOptions.Persist | DACL_SECURITY_INFORMATION);
key.SetProperty(updatedACL);
}
