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//
// VMime library (http://www.vmime.org)
// Copyright (C) 2002 Vincent Richard <vincent@vmime.org>
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU 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
// General Public License for more details.
//
// You should have received a copy of the GNU General Public License along
// with this program; if not, write to the Free Software Foundation, Inc.,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
//
// Linking this library statically or dynamically with other modules is making
// a combined work based on this library.  Thus, the terms and conditions of
// the GNU General Public License cover the whole combination.
//

#ifndef VMIME_SECURITY_SASL_XOAUTH2SASLMECHANISM_HPP_INCLUDED
#define VMIME_SECURITY_SASL_XOAUTH2SASLMECHANISM_HPP_INCLUDED


#include "vmime/config.hpp"


#if VMIME_HAVE_MESSAGING_FEATURES && VMIME_HAVE_SASL_SUPPORT


#include "vmime/security/sasl/SASLMechanism.hpp"


namespace vmime {
namespace security {
namespace sasl {


class SASLContext;


/** SASL XOAUTH2 mechanism, used by GMail.
  */
class VMIME_EXPORT XOAuth2SASLMechanism : public SASLMechanism {

public:

	XOAuth2SASLMechanism(const shared_ptr <SASLContext>& ctx, const string& name);
	~XOAuth2SASLMechanism();


	const string getName() const;

	bool step(
		const shared_ptr <SASLSession>& sess,
		const byte_t* challenge,
		const size_t challengeLen,
		byte_t** response,
		size_t* responseLen
	);

	bool isComplete() const;

	bool hasInitialResponse() const;

	void encode(
		const shared_ptr <SASLSession>& sess,
		const byte_t* input,
		const size_t inputLen,
		byte_t** output,
		size_t* outputLen
	);

	void decode(
		const shared_ptr <SASLSession>& sess,
		const byte_t* input,
		const size_t inputLen,
		byte_t** output,
		size_t* outputLen
	);

private:

	/** SASL context */
	shared_ptr <SASLContext> m_context;

	/** Authentication process status. */
	bool m_complete;
};


} // sasl
} // security
} // vmime


#endif // VMIME_HAVE_MESSAGING_FEATURES && VMIME_HAVE_SASL_SUPPORT

#endif // VMIME_SECURITY_SASL_XOAUTH2SASLMECHANISM_HPP_INCLUDED