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diff --git a/src/modules/AuthBackendChallengeResponse/AuthBackendChallengeResponse.h b/src/modules/AuthBackendChallengeResponse/AuthBackendChallengeResponse.h
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+/*
+ * AuthBackendChallengeResponse.h
+ *
+ * Copyright (C) 2008 Matthias Schiffer <matthias@gamezock.de>
+ *
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by the
+ * Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ * See the GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License along
+ * with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef MAD_MODULES_AUTHBACKENDCHALLENGERESPONSE_AUTHBACKENDCHALLENGERESPONSE_H_
+#define MAD_MODULES_AUTHBACKENDCHALLENGERESPONSE_AUTHBACKENDCHALLENGERESPONSE_H_
+
+#include "../export.h"
+
+#include <Common/AuthBackend.h>
+#include <Common/AuthContext.h>
+#include <Common/AuthProvider.h>
+#include <Common/Application.h>
+
+#include <boost/random/mersenne_twister.hpp>
+#include <boost/random/uniform_int.hpp>
+#include <boost/random/variate_generator.hpp>
+
+
+namespace Mad {
+namespace Modules {
+namespace AuthBackendChallengeResponse {
+
+class MAD_MODULE_EXPORT AuthBackendChallengeResponse : public Common::AuthBackend, private boost::noncopyable {
+  private:
+    class AuthContextChallengeResponse : public Common::AuthContext {
+      private:
+        friend class AuthBackendChallengeResponse;
+
+        bool authenticated;
+        std::vector<boost::uint8_t> challenge;
+
+        AuthContextChallengeResponse(AuthBackendChallengeResponse *backend);
+
+      protected:
+        virtual bool isAuthenticated() const {
+          return authenticated;
+        }
+    };
+
+    static const std::string methodName;
+
+    Common::Application *application;
+
+    boost::mt19937 rng;
+    boost::uniform_int<boost::uint8_t> byteDistribution;
+    boost::variate_generator<boost::mt19937&, boost::uniform_int<boost::uint8_t> > randomGenerator;
+
+
+  protected:
+    virtual const std::string& getMethodName() const {
+      return methodName;
+    }
+
+    virtual std::vector<std::string> getSubMethods(boost::shared_ptr<Common::AuthProvider> provider) const {
+      std::vector<std::string> ret;
+      ret.push_back(provider->getHashes().front());
+
+      return ret;
+    }
+
+    virtual boost::shared_ptr<Common::AuthContext> authenticate(boost::shared_ptr<Common::AuthProvider> provider, const std::string &subMethod,
+        const std::string &user, const std::vector<boost::uint8_t> &data, std::vector<boost::uint8_t> &response,
+        boost::shared_ptr<Common::AuthContext> context) throw(Core::Exception);
+
+  public:
+    AuthBackendChallengeResponse(Common::Application *application0)
+    : application(application0), byteDistribution(0, 255), randomGenerator(rng, byteDistribution) {}
+};
+
+}
+}
+}
+
+#endif /* MAD_MODULES_AUTHBACKENDCHALLENGERESPONSE_AUTHBACKENDCHALLENGERESPONSE_H_ */