1 files changed, 61 insertions, 0 deletions
diff --git a/Crypto/src/crypto/IDigest.cs b/Crypto/src/crypto/IDigest.cs
new file mode 100644
index 000000000..6769dcc42
--- /dev/null
+++ b/Crypto/src/crypto/IDigest.cs
@@ -0,0 +1,61 @@
+using System;
+
+namespace Org.BouncyCastle.Crypto
+{
+    /**
+     * interface that a message digest conforms to.
+     */
+    public interface IDigest
+    {
+        /**
+         * return the algorithm name
+         *
+         * @return the algorithm name
+         */
+        string AlgorithmName { get; }
+
+		/**
+         * return the size, in bytes, of the digest produced by this message digest.
+         *
+         * @return the size, in bytes, of the digest produced by this message digest.
+         */
+		int GetDigestSize();
+
+		/**
+         * return the size, in bytes, of the internal buffer used by this digest.
+         *
+         * @return the size, in bytes, of the internal buffer used by this digest.
+         */
+		int GetByteLength();
+
+		/**
+         * update the message digest with a single byte.
+         *
+         * @param inByte the input byte to be entered.
+         */
+        void Update(byte input);
+
+        /**
+         * update the message digest with a block of bytes.
+         *
+         * @param input the byte array containing the data.
+         * @param inOff the offset into the byte array where the data starts.
+         * @param len the length of the data.
+         */
+        void BlockUpdate(byte[] input, int inOff, int length);
+
+        /**
+         * Close the digest, producing the final digest value. The doFinal
+         * call leaves the digest reset.
+         *
+         * @param output the array the digest is to be copied into.
+         * @param outOff the offset into the out array the digest is to start at.
+         */
+        int DoFinal(byte[] output, int outOff);
+
+        /**
+         * reset the digest back to it's initial state.
+         */
+        void Reset();
+    }
+}