public static IEnumerable <CngAlgorithm> GetSupportedAlgorithms(this CngProvider provider,
NCryptAlgorithmOperations operations)
{
using (SafeNCryptProviderHandle providerHandle = provider.OpenProvider())
{
foreach (NCryptNative.NCryptAlgorithmName algorithm in NCryptNative.EnumerateAlgorithms(providerHandle, operations))
{
yield return(new CngAlgorithm(algorithm.pszName));
}
}
}
public static IEnumerable <CngAlgorithm> GetSupportedAlgorithms(this CngProvider provider,
NCryptAlgorithmOperations operations)
{
using (SafeNCryptProviderHandle providerHandle = provider.OpenProvider())
{
NCryptNative.NCryptAlgorithmName[] algorithmNames = NCryptNative.EnumerateAlgorithms(providerHandle, operations);
CngAlgorithm[] algorithms = new CngAlgorithm[algorithmNames.Length];
for (int i = 0; i < algorithmNames.Length; ++i)
{
algorithms[i] = new CngAlgorithm(algorithmNames[i].pszName);
}
return(algorithms);
}
}
internal static NCryptAlgorithmName[] EnumerateAlgorithms(SafeNCryptProviderHandle provider,
NCryptAlgorithmOperations operations)
{
Debug.Assert(provider != null && !provider.IsClosed && !provider.IsInvalid, "Invalid provider");
uint algorithmCount = 0;
SafeNCryptBuffer algorithmBuffer = null;
try
{
// Ask CNG for the list of algorithms
ErrorCode enumStatus = UnsafeNativeMethods.NCryptEnumAlgorithms(provider,
operations,
out algorithmCount,
out algorithmBuffer,
0);
if (enumStatus != ErrorCode.Success)
{
throw new CryptographicException((int)enumStatus);
}
// Copy the algorithm names into a managed array
NCryptAlgorithmName[] algorithms = new NCryptAlgorithmName[algorithmCount];
for (uint i = 0; i < algorithms.Length; ++i)
{
algorithms[i] = algorithmBuffer.ReadArray <NCryptAlgorithmName>(i);
}
return(algorithms);
}
finally
{
if (algorithmBuffer != null)
{
algorithmBuffer.Dispose();
}
}
}
internal static extern ErrorCode NCryptEnumAlgorithms(SafeNCryptProviderHandle hProvider,
NCryptAlgorithmOperations dwAlgOperations,
[Out] out uint pdwAlgCount,
[Out] out SafeNCryptBuffer ppAlgList,
int dwFlags);
public static IEnumerable<CngAlgorithm> GetSupportedAlgorithms(this CngProvider provider,
NCryptAlgorithmOperations operations)
{
using (SafeNCryptProviderHandle providerHandle = provider.OpenProvider())
{
foreach (NCryptNative.NCryptAlgorithmName algorithm in NCryptNative.EnumerateAlgorithms(providerHandle, operations))
{
yield return new CngAlgorithm(algorithm.pszName);
}
}
}
