init commit

output/Libraries/BouncyCastle.Crypto/Org/BouncyCastle/Crypto/Prng/SP800SecureRandom.cs

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+using System;
+using Org.BouncyCastle.Crypto.Prng.Drbg;
+using Org.BouncyCastle.Security;
+
+namespace Org.BouncyCastle.Crypto.Prng;
+
+public class SP800SecureRandom : SecureRandom
+{
+	private readonly IDrbgProvider mDrbgProvider;
+
+	private readonly bool mPredictionResistant;
+
+	private readonly SecureRandom mRandomSource;
+
+	private readonly IEntropySource mEntropySource;
+
+	private ISP80090Drbg mDrbg;
+
+	internal SP800SecureRandom(SecureRandom randomSource, IEntropySource entropySource, IDrbgProvider drbgProvider, bool predictionResistant)
+		: base((IRandomGenerator)null)
+	{
+		mRandomSource = randomSource;
+		mEntropySource = entropySource;
+		mDrbgProvider = drbgProvider;
+		mPredictionResistant = predictionResistant;
+	}
+
+	public override void SetSeed(byte[] seed)
+	{
+		lock (this)
+		{
+			if (mRandomSource != null)
+			{
+				mRandomSource.SetSeed(seed);
+			}
+		}
+	}
+
+	public override void SetSeed(long seed)
+	{
+		lock (this)
+		{
+			if (mRandomSource != null)
+			{
+				mRandomSource.SetSeed(seed);
+			}
+		}
+	}
+
+	public override void NextBytes(byte[] bytes)
+	{
+		lock (this)
+		{
+			if (mDrbg == null)
+			{
+				mDrbg = mDrbgProvider.Get(mEntropySource);
+			}
+			if (mDrbg.Generate(bytes, null, mPredictionResistant) < 0)
+			{
+				mDrbg.Reseed(null);
+				mDrbg.Generate(bytes, null, mPredictionResistant);
+			}
+		}
+	}
+
+	public override void NextBytes(byte[] buf, int off, int len)
+	{
+		byte[] array = new byte[len];
+		NextBytes(array);
+		Array.Copy(array, 0, buf, off, len);
+	}
+
+	public override byte[] GenerateSeed(int numBytes)
+	{
+		return EntropyUtilities.GenerateSeed(mEntropySource, numBytes);
+	}
+
+	public virtual void Reseed(byte[] additionalInput)
+	{
+		lock (this)
+		{
+			if (mDrbg == null)
+			{
+				mDrbg = mDrbgProvider.Get(mEntropySource);
+			}
+			mDrbg.Reseed(additionalInput);
+		}
+	}
+}