/*
 * The Apache Software License, Version 1.1
 *
 *
 * Copyright (c) 1999 The Apache Software Foundation.  All rights 
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
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 *        Apache Software Foundation (http://www.apache.org/)."
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 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation and was
 * originally based on software copyright (c) 2001, Institute for
 * Data Communications Systems, <http://www.nue.et-inf.uni-siegen.de/>.
 * The development of this software was partly funded by the European 
 * Commission in the <WebSig> project in the ISIS Programme. 
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 */

/*
 * XSEC
 *
 * XSECCryptoX509:= A base class for handling X509 (V3) certificates
 *
 * Author(s): Berin Lautenbach
 *
 * $Id: XSECCryptoX509.hpp,v 1.4 2003/03/02 08:21:01 blautenb Exp $
 *
 */

#ifndef XSECCRYPTOX509_INCLUDE
#define XSECCRYPTOX509_INCLUDE

#include <xsec/framework/XSECDefs.hpp>
#include <xsec/enc/XSECCryptoKey.hpp>
#include <xsec/utils/XSECSafeBuffer.hpp>

/**
 * \brief Interface class for X509 certificates.
 * @ingroup crypto
 *
 * The library uses classes derived from this to process X509 Certificates.
 *
 * Strictly speaking, this class is not required.  However it is used by
 * XSECKeyInfoResolverDefault to extract a key from a certificate in cases
 * where the caller is not worried about the trust level of the certificate.
 *
 */


class DSIG_EXPORT XSECCryptoX509 {

public :

	/** @name Constructors and Destructors */
	//@{

	XSECCryptoX509() {};
	virtual ~XSECCryptoX509() {};

	//@}
	/** @name Key Interface methods */
	//@{

	/**
	 * \brief Return the type of the key stored in the certificate.
	 *
	 * The implementation is expected to extract the key from the 
	 * certificate and determine the type.
	 *
	 */

	virtual XSECCryptoKey::KeyType getPublicKeyType() = 0;

	/**
	 * \brief Get a copy of the public key.
	 *
	 * The implementation should extract the key from the certificate,
	 * create an instance of the appropriate key type, and return it.
	 *
	 */

	virtual XSECCryptoKey * clonePublicKey() = 0;

	//@}

	/** @name Load and Get the certificate */
	//@{

	/**
	 * \brief Load a certificate into the object.
	 *
	 * Take a base64 DER encoded certificate and load.
	 *
	 * @param buf A buffer containing the Base64 encoded certificate
	 * @param len The number of bytes of data in the certificate.
	 */

	virtual void loadX509Base64Bin(const char * buf, unsigned int len) = 0;

	/**
	 * \brief Get a Base64 DER encoded copy of the certificate
	 *
	 * @returns A safeBuffer containing the DER encoded certificate
	 */

	virtual safeBuffer &getDEREncodingSB(void) = 0;		// Get the DER string

	//@}

};


#endif /* XSECCRYPTOX509_INCLUDE */