/*
 *  CERT_LicenseVerifier.h
 *
 *  Created by Andrew Salamon on 9/15/08.
 *  Copyright 2008 Machine Perception Laboratory, University of California San Diego. All rights reserved.
 *
 */

#ifndef __CERT_LICENSEVERIFIER_H__
#define __CERT_LICENSEVERIFIER_H__

#include <string>
#include <exception>
#include <stdexcept>

#include <openssl/rsa.h>

namespace CERT
{
	namespace Licensing
	{
		class keyException : public std::runtime_error
		{
		public:
			keyException( const std::string &msg ) : std::runtime_error(msg) { }
		};
		
		class encryptionException : public std::runtime_error
		{
		public:
			encryptionException( const std::string &msg ) : std::runtime_error(msg) { }
		};
		class decryptionException : public encryptionException
		{
		public:
			decryptionException( const std::string &msg ) : encryptionException(msg) { }
		};
	}
	
class LicenseVerifier
{
public:
    static std::string encodeBase64( const std::string &str );
    static std::string decodeBase64( const std::string &str );

public:
	LicenseVerifier();
	LicenseVerifier( const std::string &privateKeyPath );

	std::string encrypt( const std::string &plaintext ); ///< Will throw an exception if a private key hasn't been loaded.
	std::string decrypt( const std::string &cyphertext );

	bool loadPrivateKey( const std::string &privateKeyPath );
	
private:
	RSA *privateKey;
	RSA *publicKey;

	void setPrivateKey( RSA *key );
	void setPublicKey( RSA *key );

	bool loadPublicKey( const std::string &keyString );
};

} // end namespace CERT

#endif