1 files changed, 24 insertions, 0 deletions
diff --git a/Crypto/src/crypto/IBasicAgreement.cs b/Crypto/src/crypto/IBasicAgreement.cs
new file mode 100644
index 000000000..8bd363d4e
--- /dev/null
+++ b/Crypto/src/crypto/IBasicAgreement.cs
@@ -0,0 +1,24 @@
+using System;
+using Org.BouncyCastle.Math;
+
+namespace Org.BouncyCastle.Crypto
+{
+    /**
+     * The basic interface that basic Diffie-Hellman implementations
+     * conforms to.
+     */
+    public interface IBasicAgreement
+    {
+        /**
+         * initialise the agreement engine.
+         */
+        void Init(ICipherParameters parameters);
+
+        /**
+         * given a public key from a given party calculate the next
+         * message in the agreement sequence.
+         */
+        BigInteger CalculateAgreement(ICipherParameters pubKey);
+    }
+
+}