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diff --git a/botan/src/mac/mac.h b/botan/src/mac/mac.h
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+/**
+* Base class for message authentiction codes
+* (C) 1999-2007 Jack Lloyd
+*
+* Distributed under the terms of the Botan license
+*/
+
+#ifndef BOTAN_MESSAGE_AUTH_CODE_BASE_H__
+#define BOTAN_MESSAGE_AUTH_CODE_BASE_H__
+
+#include <botan/buf_comp.h>
+#include <botan/sym_algo.h>
+#include <string>
+
+namespace Botan {
+
+/**
+* This class represents Message Authentication Code (MAC) objects.
+*/
+class BOTAN_DLL MessageAuthenticationCode : public BufferedComputation,
+ public SymmetricAlgorithm
+ {
+ public:
+ /**
+ * Verify a MAC.
+ * @param in the MAC to verify as a byte array
+ * @param length the length of the byte array
+ * @return true if the MAC is valid, false otherwise
+ */
+ virtual bool verify_mac(const byte[], u32bit);
+
+ /**
+ * Get a new object representing the same algorithm as *this
+ */
+ virtual MessageAuthenticationCode* 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;
+
+ MessageAuthenticationCode(u32bit mac_len,
+ u32bit key_min,
+ u32bit key_max = 0,
+ u32bit key_mod = 1) :
+ BufferedComputation(mac_len),
+ SymmetricAlgorithm(key_min, key_max, key_mod) {}
+
+ virtual ~MessageAuthenticationCode() {}
+ };
+
+}
+
+#endif