1 files changed, 37 insertions, 0 deletions
diff --git a/src/lib/hash/hash.h b/src/lib/hash/hash.h
new file mode 100644
index 000000000..1e4b045e2
--- /dev/null
+++ b/src/lib/hash/hash.h
@@ -0,0 +1,37 @@
+/*
+* Hash Function Base Class
+* (C) 1999-2008 Jack Lloyd
+*
+* Distributed under the terms of the Botan license
+*/
+
+#ifndef BOTAN_HASH_FUNCTION_BASE_CLASS_H__
+#define BOTAN_HASH_FUNCTION_BASE_CLASS_H__
+
+#include <botan/buf_comp.h>
+#include <botan/algo_base.h>
+#include <string>
+
+namespace Botan {
+
+/**
+* This class represents hash function (message digest) objects
+*/
+class BOTAN_DLL HashFunction : public Buffered_Computation,
+                               public Algorithm
+   {
+   public:
+      /**
+      * @return new object representing the same algorithm as *this
+      */
+      virtual HashFunction* clone() const = 0;
+
+      /**
+      * @return hash block size as defined for this algorithm
+      */
+      virtual size_t hash_block_size() const { return 0; }
+   };
+
+}
+
+#endif