public static CngKey Open(string keyName, CngProvider provider, CngKeyOpenOptions openOptions)
{
if (keyName == null)
{
throw new ArgumentNullException("keyName");
}
if (provider == null)
{
throw new ArgumentNullException("provider");
}
if (!NCryptNative.NCryptSupported)
{
throw new PlatformNotSupportedException(System.SR.GetString("Cryptography_PlatformNotSupported"));
}
KeyContainerPermissionAccessEntry accessEntry = new KeyContainerPermissionAccessEntry(keyName, KeyContainerPermissionFlags.Open)
{
ProviderName = provider.Provider
};
KeyContainerPermission permission = new KeyContainerPermission(KeyContainerPermissionFlags.NoFlags);
permission.AccessEntries.Add(accessEntry);
permission.Demand();
SafeNCryptProviderHandle kspHandle = NCryptNative.OpenStorageProvider(provider.Provider);
return(new CngKey(kspHandle, NCryptNative.OpenKey(kspHandle, keyName, openOptions)));
}
public static CngKey Open(string keyName, CngProvider provider, CngKeyOpenOptions openOptions)
{
Contract.Ensures(Contract.Result <CngKey>() != null);
if (keyName == null)
{
throw new ArgumentNullException("keyName");
}
if (provider == null)
{
throw new ArgumentNullException("provider");
}
// Make sure that NCrypt is supported on this platform
if (!NCryptNative.NCryptSupported)
{
throw new PlatformNotSupportedException(SR.GetString(SR.Cryptography_PlatformNotSupported));
}
// Ensure the user has access to the key name
KeyContainerPermissionAccessEntry access = new KeyContainerPermissionAccessEntry(keyName, KeyContainerPermissionFlags.Open);
access.ProviderName = provider.Provider;
KeyContainerPermission permission = new KeyContainerPermission(KeyContainerPermissionFlags.NoFlags);
permission.AccessEntries.Add(access);
permission.Demand();
// Open the key
SafeNCryptProviderHandle kspHandle = NCryptNative.OpenStorageProvider(provider.Provider);
SafeNCryptKeyHandle keyHandle = NCryptNative.OpenKey(kspHandle, keyName, openOptions);
return(new CngKey(kspHandle, keyHandle));
}