1 files changed, 30 insertions, 0 deletions
diff --git a/crypto/src/crypto/IAsymmetricBlockCipher.cs b/crypto/src/crypto/IAsymmetricBlockCipher.cs
new file mode 100644
index 000000000..455cfaa69
--- /dev/null
+++ b/crypto/src/crypto/IAsymmetricBlockCipher.cs
@@ -0,0 +1,30 @@
+using System;
+
+namespace Org.BouncyCastle.Crypto
+{
+	/// <remarks>Base interface for a public/private key block cipher.</remarks>
+	public interface IAsymmetricBlockCipher
+    {
+		/// <summary>The name of the algorithm this cipher implements.</summary>
+        string AlgorithmName { get; }
+
+		/// <summary>Initialise the cipher.</summary>
+		/// <param name="forEncryption">Initialise for encryption if true, for decryption if false.</param>
+		/// <param name="parameters">The key or other data required by the cipher.</param>
+        void Init(bool forEncryption, ICipherParameters parameters);
+
+		/// <returns>The maximum size, in bytes, an input block may be.</returns>
+        int GetInputBlockSize();
+
+		/// <returns>The maximum size, in bytes, an output block will be.</returns>
+		int GetOutputBlockSize();
+
+		/// <summary>Process a block.</summary>
+		/// <param name="inBuf">The input buffer.</param>
+		/// <param name="inOff">The offset into <paramref>inBuf</paramref> that the input block begins.</param>
+		/// <param name="inLen">The length of the input block.</param>
+		/// <exception cref="InvalidCipherTextException">Input decrypts improperly.</exception>
+		/// <exception cref="DataLengthException">Input is too large for the cipher.</exception>
+        byte[] ProcessBlock(byte[] inBuf, int inOff, int inLen);
+    }
+}