/// <summary>
/// Creates a light weight PRNG from a Pooled Generator.
/// This will wait until the Pooled Generator has created its first seed.
/// </summary>
public static Task <IRandomNumberGenerator> CreateCypherBasedGeneratorAsync(this PooledEntropyCprngGenerator pooledRng)
{
if (pooledRng == null)
{
throw new ArgumentNullException(nameof(pooledRng));
}
if (pooledRng.ReseedCount > 0)
{
return(Task.FromResult(pooledRng.CreateCypherBasedGenerator()));
}
return(WaitAndGet(pooledRng));
}
/// <summary>
/// Creates a light weight PRNG from a Pooled Generator.
/// If the Pooled Generator has not created its first seed, this will use the system crypto random to derive a seed.
/// </summary>
public static IRandomNumberGenerator CreateCypherBasedGeneratorOrUninitialised(this PooledEntropyCprngGenerator pooledRng)
{
if (pooledRng == null)
{
throw new ArgumentNullException(nameof(pooledRng));
}
if (pooledRng.ReseedCount > 0)
{
return(pooledRng.CreateCypherBasedGenerator());
}
else
{
return(CypherBasedPrngGenerator.CreateWithSystemCrngKey());
}
}
private static async Task <IRandomNumberGenerator> WaitAndGet(PooledEntropyCprngGenerator pooledRng)
{
await pooledRng.StartAndWaitForFirstSeed();
return(pooledRng.CreateCypherBasedGenerator());
}