public static CngKey Create(CngAlgorithm algorithm, string keyName, CngKeyCreationParameters creationParameters)
{
Contract.Ensures(Contract.Result <CngKey>() != null);
if (algorithm == null)
{
throw new ArgumentNullException("algorithm");
}
if (creationParameters == null)
{
creationParameters = new CngKeyCreationParameters();
}
// Make sure that NCrypt is supported on this platform
if (!NCryptNative.NCryptSupported)
{
throw new PlatformNotSupportedException(SR.GetString(SR.Cryptography_PlatformNotSupported));
}
// If we're not creating an ephemeral key, then we need to ensure the user has access to the key name
if (keyName != null)
{
KeyContainerPermissionAccessEntry access = new KeyContainerPermissionAccessEntry(keyName, KeyContainerPermissionFlags.Create);
access.ProviderName = creationParameters.Provider.Provider;
KeyContainerPermission permission = new KeyContainerPermission(KeyContainerPermissionFlags.NoFlags);
permission.AccessEntries.Add(access);
permission.Demand();
}
//
// Create the native handles representing the new key, setup the creation parameters on it, and
// finalize it for use.
//
SafeNCryptProviderHandle kspHandle = NCryptNative.OpenStorageProvider(creationParameters.Provider.Provider);
SafeNCryptKeyHandle keyHandle = NCryptNative.CreatePersistedKey(kspHandle,
algorithm.Algorithm,
keyName,
creationParameters.KeyCreationOptions);
SetKeyProperties(keyHandle, creationParameters);
NCryptNative.FinalizeKey(keyHandle);
CngKey key = new CngKey(kspHandle, keyHandle);
// No name translates to an ephemeral key
if (keyName == null)
{
key.IsEphemeral = true;
}
return(key);
}
public static CngKey Create(CngAlgorithm algorithm, string keyName, CngKeyCreationParameters creationParameters)
{
if (algorithm == null)
{
throw new ArgumentNullException("algorithm");
}
if (creationParameters == null)
{
creationParameters = new CngKeyCreationParameters();
}
if (!NCryptNative.NCryptSupported)
{
throw new PlatformNotSupportedException(System.SR.GetString("Cryptography_PlatformNotSupported"));
}
if (keyName != null)
{
KeyContainerPermissionAccessEntry accessEntry = new KeyContainerPermissionAccessEntry(keyName, KeyContainerPermissionFlags.Create)
{
ProviderName = creationParameters.Provider.Provider
};
KeyContainerPermission permission = new KeyContainerPermission(KeyContainerPermissionFlags.NoFlags);
permission.AccessEntries.Add(accessEntry);
permission.Demand();
}
SafeNCryptProviderHandle provider = NCryptNative.OpenStorageProvider(creationParameters.Provider.Provider);
SafeNCryptKeyHandle keyHandle = NCryptNative.CreatePersistedKey(provider, algorithm.Algorithm, keyName, creationParameters.KeyCreationOptions);
SetKeyProperties(keyHandle, creationParameters);
NCryptNative.FinalizeKey(keyHandle);
CngKey key = new CngKey(provider, keyHandle);
if (keyName == null)
{
key.IsEphemeral = true;
}
return(key);
}