public SourceAndMetadata(IEntropySource source, string uniqueName)
{
Source = source ?? throw new ArgumentNullException(nameof(source));
UniqueName = uniqueName ?? throw new ArgumentNullException(nameof(uniqueName));
#if NETSTANDARD1_3
AsyncHint = IsAsync.Unknown;
#else
var maybeHintAttribute = source.GetType().GetCustomAttributesData().FirstOrDefault(x => x.AttributeType == typeof(AsyncHintAttribute));
if (maybeHintAttribute != null)
{
AsyncHint = (IsAsync)maybeHintAttribute.ConstructorArguments.First(x => x.ArgumentType == typeof(IsAsync)).Value;
}
#endif
if (AsyncHint == IsAsync.AfterInit)
{
AsyncScore = -8;
}
else if (AsyncHint == IsAsync.Never)
{
AsyncScore = -10;
}
else if (AsyncHint == IsAsync.Rarely)
{
AsyncScore = 5;
}
else
{
AsyncScore = 10;
}
}
private async Task FuzzEntropySource(int iterations, IEntropySource source, string filename, Action extra)
{
using (var sw = new StreamWriter(filename + ".txt", false, Encoding.UTF8))
{
await sw.WriteLineAsync($"{source.GetType().FullName} - {iterations:N0} iterations");
for (int i = 0; i < iterations; i++)
{
var bytes = await source.GetEntropyAsync(EntropyPriority.High);
if (bytes == null)
{
await sw.WriteLineAsync("<null>");
}
else
{
await sw.WriteLineAsync(bytes.ToHexString());
}
extra();
}
}
}