1 files changed, 51 insertions, 0 deletions
diff --git a/src/hash/hash.h b/src/hash/hash.h
new file mode 100644
index 000000000..d42ee0d82
--- /dev/null
+++ b/src/hash/hash.h
@@ -0,0 +1,51 @@
+/**
+* Hash Function Base Class
+* (C) 1999-2008 Jack Lloyd
+*/
+
+#ifndef BOTAN_HASH_FUNCTION_BASE_CLASS_H__
+#define BOTAN_HASH_FUNCTION_BASE_CLASS_H__
+
+#include <botan/types.h>
+#include <botan/buf_comp.h>
+#include <string>
+
+namespace Botan {
+
+/**
+* This class represents hash function (message digest) objects.
+*/
+class BOTAN_DLL HashFunction : public BufferedComputation
+   {
+   public:
+      /**
+      * The hash block size as defined for this algorithm.
+      */
+      const u32bit HASH_BLOCK_SIZE;
+
+      /**
+      * Get a new object representing the same algorithm as *this
+      */
+      virtual HashFunction* clone() const = 0;
+
+      /**
+      * Get the name of this algorithm.
+      * @return the name of this algorithm
+      */
+      virtual std::string name() const = 0;
+
+      /**
+      * Reset the internal state of this object.
+      */
+      virtual void clear() throw() = 0;
+
+      HashFunction(u32bit hash_len, u32bit block_len = 0) :
+         BufferedComputation(hash_len), HASH_BLOCK_SIZE(block_len) {}
+      virtual ~HashFunction() {}
+   private:
+      HashFunction& operator=(const HashFunction&);
+   };
+
+}
+
+#endif