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/*
* Base class for message authentiction codes
* (C) 1999-2007 Jack Lloyd
*
* Botan is released under the Simplified BSD License (see license.txt)
*/
#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 <botan/scan_name.h>
#include <string>
namespace Botan {
/**
* This class represents Message Authentication Code (MAC) objects.
*/
class BOTAN_DLL MessageAuthenticationCode : public Buffered_Computation,
public SymmetricAlgorithm
{
public:
typedef SCAN_Name Spec;
/**
* Create an instance based on a name
* Will return a null pointer if the algo/provider combination cannot
* be found. If provider is empty then best available is chosen.
*/
static std::unique_ptr<MessageAuthenticationCode> create(const std::string& algo_spec,
const std::string& provider = "");
/**
* Returns the list of available providers for this algorithm, empty if not available
*/
static std::vector<std::string> providers(const std::string& algo_spec);
virtual ~MessageAuthenticationCode();
/**
* Verify a MAC.
* @param in the MAC to verify as a byte array
* @param length the length of param in
* @return true if the MAC is valid, false otherwise
*/
virtual bool verify_mac(const byte in[], size_t length);
/**
* Get a new object representing the same algorithm as *this
*/
virtual MessageAuthenticationCode* clone() const = 0;
};
typedef MessageAuthenticationCode MAC;
}
#endif
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