/** 

 * XML Security Library (http://www.aleksey.com/xmlsec).

 *

 * "XML Encryption" implementation

 *  http://www.w3.org/TR/xmlenc-core

 * 

 * This is free software; see Copyright file in the source

 * distribution for preciese wording.

 * 

 * Copyright (C) 2002-2003 Aleksey Sanin <aleksey@aleksey.com>

 * Portion Copyright © 2009 Nokia Corporation and/or its subsidiary(-ies). All rights reserved. 

 */

#ifndef __XMLSEC_XMLENC_H__

#define __XMLSEC_XMLENC_H__    

#include "xmlsec_config.h"

#ifndef XMLSEC_NO_XMLENC

#ifdef __cplusplus

extern "C" {

#endif /* __cplusplus */ 

#include <stdio.h>		

#include <libxml2_tree.h>

#include <libxml2_parser.h>

#include "xmlsec_xmlsec.h"

#include "xmlsec_buffer.h"

#include "xmlsec_keys.h"

#include "xmlsec_keysmngr.h"

#include "xmlsec_keyinfo.h"

#include "xmlsec_transforms.h"

/** 

 * xmlEncCtxMode: 

 * @xmlEncCtxModeEncryptedData:	the <enc:EncryptedData/> element procesing.

 * @xmlEncCtxModeEncryptedKey:	the <enc:EncryptedKey/> element processing.

 *

 * The #xmlSecEncCtx mode.

 */

typedef enum {

    xmlEncCtxModeEncryptedData = 0,

    xmlEncCtxModeEncryptedKey

} xmlEncCtxMode;

/** 

 * xmlSecEncCtx:

 * @userData:			the pointer to user data (xmlsec and xmlsec-crypto libraries

 *				never touches this).

 * @flags:			the XML Encryption processing flags.

 * @flags2:			the XML Encryption processing flags.

 * @mode:			the mode.

 * @keyInfoReadCtx:		the reading key context.

 * @keyInfoWriteCtx:		the writing key context (not used for signature verification).

 * @transformCtx:		the transforms processing context.

 * @defEncMethodId:		the default encryption method (used if

 *				<enc:EncryptionMethod/> node is not present).

 * @encKey:			the signature key; application may set #encKey

 *				before calling encryption/decryption functions.

 * @operation:			the operation: encrypt or decrypt.

 * @result:			the pointer to signature (not valid for signature verificaction).

 * @resultBase64Encoded:	the flag: if set then result in #result is base64 encoded.

 * @resultReplaced:		the flag: if set then resulted <enc:EncryptedData/>

 *				or <enc:EncryptedKey/> node is added to the document.

 * @encMethod:			the pointer to encryption transform.

 * @id:				the ID attribute of <enc:EncryptedData/>

 *				or <enc:EncryptedKey/> node.

 * @type:			the Type attribute of <enc:EncryptedData/>

 *				or <enc:EncryptedKey/> node.

 * @mimeType:			the MimeType attribute of <enc:EncryptedData/>

 *				or <enc:EncryptedKey/> node.

 * @encoding:			the Encoding attributeof <enc:EncryptedData/>

 *				or <enc:EncryptedKey/> node. 

 * @recipient:			the Recipient attribute of <enc:EncryptedKey/> node..

 * @carriedKeyName:		the CarriedKeyName attribute of <enc:EncryptedKey/> node.

 * @encDataNode:		the pointer to <enc:EncryptedData/>

 *				or <enc:EncryptedKey/> node.

 * @encMethodNode:		the pointer to <enc:EncryptionMethod/> node.

 * @keyInfoNode:		the pointer to <enc:KeyInfo/> node.

 * @cipherValueNode:		the pointer to <enc:CipherValue/> node.

 * @reserved0:			reserved for the future.

 * @reserved1:			reserved for the future.

 * 

 * XML Encrypiton context.

 */

struct _xmlSecEncCtx {

    /* these data user can set before performing the operation */

    void*			userData;

    unsigned int		flags;

    unsigned int		flags2;    

    xmlEncCtxMode		mode;

    xmlSecKeyInfoCtx		keyInfoReadCtx;

    xmlSecKeyInfoCtx		keyInfoWriteCtx;

    xmlSecTransformCtx		transformCtx;

    xmlSecTransformId		defEncMethodId;

    /* these data are returned */

    xmlSecKeyPtr		encKey;

    xmlSecTransformOperation	operation;

    xmlSecBufferPtr		result;

    int				resultBase64Encoded;

    int				resultReplaced;

    xmlSecTransformPtr		encMethod;

    /* attributes from EncryptedData or EncryptedKey */    

    xmlChar*			id;

    xmlChar*			type;

    xmlChar*			mimeType;

    xmlChar*			encoding;

    xmlChar*			recipient;

    xmlChar*			carriedKeyName;

    /* these are internal data, nobody should change that except us */

    xmlNodePtr			encDataNode;

    xmlNodePtr			encMethodNode;

    xmlNodePtr			keyInfoNode;

    xmlNodePtr			cipherValueNode;

    /* reserved for future */

    void*			reserved0;

    void*			reserved1;

};

XMLSEC_EXPORT xmlSecEncCtxPtr	xmlSecEncCtxCreate		(xmlSecKeysMngrPtr keysMngr);

XMLSEC_EXPORT void 		xmlSecEncCtxDestroy		(xmlSecEncCtxPtr encCtx);

XMLSEC_EXPORT int		xmlSecEncCtxInitialize		(xmlSecEncCtxPtr encCtx,

								 xmlSecKeysMngrPtr keysMngr);

XMLSEC_EXPORT void		xmlSecEncCtxFinalize		(xmlSecEncCtxPtr encCtx);

XMLSEC_EXPORT int		xmlSecEncCtxCopyUserPref	(xmlSecEncCtxPtr dst,

								 xmlSecEncCtxPtr src);

XMLSEC_EXPORT void		xmlSecEncCtxReset		(xmlSecEncCtxPtr encCtx);

XMLSEC_EXPORT int		xmlSecEncCtxBinaryEncrypt	(xmlSecEncCtxPtr encCtx,

								 xmlNodePtr tmpl,

								 const xmlSecByte* data,

								 xmlSecSize dataSize);

XMLSEC_EXPORT int		xmlSecEncCtxXmlEncrypt		(xmlSecEncCtxPtr encCtx,

								 xmlNodePtr tmpl,

								 xmlNodePtr node);

XMLSEC_EXPORT int		xmlSecEncCtxUriEncrypt		(xmlSecEncCtxPtr encCtx,

								 xmlNodePtr tmpl,

								 const xmlChar *uri);

XMLSEC_EXPORT int		xmlSecEncCtxDecrypt		(xmlSecEncCtxPtr encCtx,

								 xmlNodePtr node);

XMLSEC_EXPORT xmlSecBufferPtr	xmlSecEncCtxDecryptToBuffer	(xmlSecEncCtxPtr encCtx,

								 xmlNodePtr node		);

XMLSEC_EXPORT void		xmlSecEncCtxDebugDump		(xmlSecEncCtxPtr encCtx,

								 FILE* output);

XMLSEC_EXPORT void		xmlSecEncCtxDebugXmlDump	(xmlSecEncCtxPtr encCtx,

								 FILE* output);

#ifdef __cplusplus

}

#endif /* __cplusplus */

#endif /* XMLSEC_NO_XMLENC */

#endif /* __XMLSEC_XMLENC_H__ */