init commit

output/Libraries/BouncyCastle.Crypto/Org/BouncyCastle/Crypto/Engines/RsaEngine.cs

@@ -0,0 +1,42 @@
+using Org.BouncyCastle.Math;
+
+namespace Org.BouncyCastle.Crypto.Engines;
+
+public class RsaEngine : IAsymmetricBlockCipher
+{
+	private readonly IRsa core;
+
+	public virtual string AlgorithmName => "RSA";
+
+	public RsaEngine()
+		: this(new RsaCoreEngine())
+	{
+	}
+
+	public RsaEngine(IRsa rsa)
+	{
+		core = rsa;
+	}
+
+	public virtual void Init(bool forEncryption, ICipherParameters parameters)
+	{
+		core.Init(forEncryption, parameters);
+	}
+
+	public virtual int GetInputBlockSize()
+	{
+		return core.GetInputBlockSize();
+	}
+
+	public virtual int GetOutputBlockSize()
+	{
+		return core.GetOutputBlockSize();
+	}
+
+	public virtual byte[] ProcessBlock(byte[] inBuf, int inOff, int inLen)
+	{
+		BigInteger input = core.ConvertInput(inBuf, inOff, inLen);
+		BigInteger result = core.ProcessBlock(input);
+		return core.ConvertOutput(result);
+	}
+}