1 files changed, 36 insertions, 0 deletions
diff --git a/Crypto/src/crypto/IBlockCipher.cs b/Crypto/src/crypto/IBlockCipher.cs
new file mode 100644
index 000000000..a3ad6d6e5
--- /dev/null
+++ b/Crypto/src/crypto/IBlockCipher.cs
@@ -0,0 +1,36 @@
+using System;
+
+namespace Org.BouncyCastle.Crypto
+{
+	/// <remarks>Base interface for a symmetric key block cipher.</remarks>
+    public interface IBlockCipher
+    {
+		/// <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 block size for this cipher, in bytes.</returns>
+		int GetBlockSize();
+
+		/// <summary>Indicates whether this cipher can handle partial blocks.</summary>
+		bool IsPartialBlockOkay { get; }
+
+		/// <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="outBuf">The output buffer.</param>
+		/// <param name="outOff">The offset into <paramref>outBuf</paramref> to write the output block.</param>
+		/// <exception cref="DataLengthException">If input block is wrong size, or outBuf too small.</exception>
+		/// <returns>The number of bytes processed and produced.</returns>
+		int ProcessBlock(byte[] inBuf, int inOff, byte[] outBuf, int outOff);
+
+		/// <summary>
+		/// Reset the cipher to the same state as it was after the last init (if there was one).
+		/// </summary>
+        void Reset();
+    }
+}