1 files changed, 45 insertions, 0 deletions
diff --git a/Crypto/src/crypto/IStreamCipher.cs b/Crypto/src/crypto/IStreamCipher.cs
new file mode 100644
index 000000000..8e575a7e5
--- /dev/null
+++ b/Crypto/src/crypto/IStreamCipher.cs
@@ -0,0 +1,45 @@
+using System;
+
+namespace Org.BouncyCastle.Crypto
+{
+ /// <summary>The interface stream ciphers conform to.</summary>
+ public interface IStreamCipher
+ {
+ /// <summary>The name of the algorithm this cipher implements.</summary>
+ string AlgorithmName { get; }
+
+ /// <summary>Initialise the cipher.</summary>
+ /// <param name="forEncryption">If true the cipher is initialised for encryption,
+ /// if false for decryption.</param>
+ /// <param name="parameters">The key and other data required by the cipher.</param>
+ /// <exception cref="ArgumentException">
+ /// If the parameters argument is inappropriate.
+ /// </exception>
+ void Init(bool forEncryption, ICipherParameters parameters);
+
+ /// <summary>encrypt/decrypt a single byte returning the result.</summary>
+ /// <param name="input">the byte to be processed.</param>
+ /// <returns>the result of processing the input byte.</returns>
+ byte ReturnByte(byte input);
+
+ /// <summary>
+ /// Process a block of bytes from <c>input</c> putting the result into <c>output</c>.
+ /// </summary>
+ /// <param name="input">The input byte array.</param>
+ /// <param name="inOff">
+ /// The offset into <c>input</c> where the data to be processed starts.
+ /// </param>
+ /// <param name="length">The number of bytes to be processed.</param>
+ /// <param name="output">The output buffer the processed bytes go into.</param>
+ /// <param name="outOff">
+ /// The offset into <c>output</c> the processed data starts at.
+ /// </param>
+ /// <exception cref="DataLengthException">If the output buffer is too small.</exception>
+ void ProcessBytes(byte[] input, int inOff, int length, byte[] output, int outOff);
+
+ /// <summary>
+ /// Reset the cipher to the same state as it was after the last init (if there was one).
+ /// </summary>
+ void Reset();
+ }
+}
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