init commit

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

@@ -0,0 +1,46 @@
+using Org.BouncyCastle.Security;
+
+namespace Org.BouncyCastle.Crypto.Prng;
+
+public class BasicEntropySourceProvider : IEntropySourceProvider
+{
+	private class BasicEntropySource : IEntropySource
+	{
+		private readonly SecureRandom mSecureRandom;
+
+		private readonly bool mPredictionResistant;
+
+		private readonly int mEntropySize;
+
+		bool IEntropySource.IsPredictionResistant => mPredictionResistant;
+
+		int IEntropySource.EntropySize => mEntropySize;
+
+		internal BasicEntropySource(SecureRandom secureRandom, bool predictionResistant, int entropySize)
+		{
+			mSecureRandom = secureRandom;
+			mPredictionResistant = predictionResistant;
+			mEntropySize = entropySize;
+		}
+
+		byte[] IEntropySource.GetEntropy()
+		{
+			return SecureRandom.GetNextBytes(mSecureRandom, (mEntropySize + 7) / 8);
+		}
+	}
+
+	private readonly SecureRandom mSecureRandom;
+
+	private readonly bool mPredictionResistant;
+
+	public BasicEntropySourceProvider(SecureRandom secureRandom, bool isPredictionResistant)
+	{
+		mSecureRandom = secureRandom;
+		mPredictionResistant = isPredictionResistant;
+	}
+
+	public IEntropySource Get(int bitsRequired)
+	{
+		return new BasicEntropySource(mSecureRandom, mPredictionResistant, bitsRequired);
+	}
+}