fsmf.c

一个免费的SMART CARD OS系统。

/* ============================================================================
   Project Name : jayaCard
   Module Name  : proto/bios/fs/fsmf.c
   Version : $Id: fsmf.c,v 1.25 2004/04/23 20:29:15 dgil Exp $

	Description: Manage the MF

    The Original Code is jayaCard code.

    The Initial Developer of the Original Code is Gilles Dumortier.

	Portions created by the Initial Developer are Copyright (C) 2002-2004 the
    Initial Developer. All Rights Reserved.

    Contributor(s):

    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 2 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; see http://www.gnu.org/licenses/gpl.html

   History Rev	Description
   040403 dgil	wrote it from scratch
   ============================================================================
*/

#include "precomp.h"

#ifdef JAYA_FILESYSTEM

/* ============================================================================
	import from fstools.c
   ========================================================================= */

void __fs_load_DF_header(jword link);

/* ============================================================================
	__fs_new_session()

	eventually close the current session and go back to the MF

	note: eventually update lasterr if any problem to load MF header
   ========================================================================= */

void __fs_new_session(jbool bResetAlsoDF,jbool bSelMF)
{
	LOG2("FS","FS_NEW_SESSION - reset also DF = %d, select the MF = %d ",bResetAlsoDF,bSelMF);

	gGlobalSem--;

    if (bResetAlsoDF) {
		HAL_ERASE_XRAM((jbyte xdata*)&current_DF,sizeof(current_DF));
		current_DF_addr = NO_CURRENT_FILE;

		/* be sure to reset the authentication in APPLI mode */
		if (tag_life == LIFE_APPLI) {
            LOG("FS","__fs_new_session() reset authentification process !");
            BIOS_SET_SEQVAL(SEQVAL_NOPROCESS);
		}
	}

	HAL_ERASE_XRAM((jbyte xdata*)&current_EF,sizeof(current_EF));
	current_EF_addr = NO_CURRENT_FILE;
	current_recnum = NO_CURRENT_RECORD;

    if (bSelMF) {
		__fs_load_DF_header(ADDR_HEADER_MF);
	}

    gGlobalSem--;

}

/* ============================================================================
	__fs_mount_MF()

	Fill current_DF with the MasterFile (MF) header
	Eventually Select the default DF

	Some error code in lasterr if any problem.

	Note/Security : even in case of critical failures, __fs_mount_MF() on a
	card with or without filesystem shall not HALT the tag because we must
 	proceed until the ATR.
   ========================================================================= */

void __fs_mount_MF()
{
	LOG("FS","__fs_mount_MF()");

	/* bootstrap the file system ? */
	gGlobalSem = JSEC_OK;
	gBiosSem = FS_ISBOOTSTRAPED();
	gGlobalSem--;
	if (gBiosSem!=0xFF) {
		/* reset the session without selecting the MF */
		FS_NEW_SESSION(jtrue,jfalse);
		if ((gBiosSem!=LOCK_UNSET) || (gGlobalSem!=JSEC_SEM)) {
			LOG2("ATTACK","__fs_mount_MF() gBiosSem(55)=%.2X gGlobalSem(58)=%.2X",gBiosSem,gGlobalSem);
			BIOS_SETERR(ERR_FAULT);
		}

		/* nothing to mount - wait for an explicit command */
		LOG("FS","__fs_mount_MF() - nothing to mount / bootstrap not done");
		return;
	}

	/*  start a new session resetting everything (current_EF, current_DF, current_fileheader)
	    then loading MF to the current_DF using the stream API and checking the final CRC
		secure: will reset also the gGlobalSem.
	*/
	FS_NEW_SESSION(jtrue,jtrue);
	gGlobalSem++;
	if (lasterr!=NOERR) {
		LOG1("FS","__fs_mount_MF() - MF not mounted 1 error code = %d",lasterr);
		return;
	}

	if ((gGlobalSem!=JSEC_OK) || (gBiosSem!=0xFF)) {
		LOG2("ATTACK","__fs_mount_MF() gBiosSem(FF)=%.2X gGlobalSem(55)=%.2X",gBiosSem,gGlobalSem);
		FS_NEW_SESSION(jtrue,jfalse);
		BIOS_SETERR(ERR_FAULT);
		return;
	}

	LOG("FS","__fs_mount_MF() - MF mounted");

	/* select the default DF */
	if (tag_life == LIFE_APPLI) {
		/* __x temp */
		BIOS_APPLICATION_DESELECT();

		/* IMPLEMENTME __x */
		LOG("FS","__fs_mount_MF() - DefaultDF mounted __x XXX");
	}
}

/* =========================================================================
	That's all folks !
   ========================================================================= */
#endif
/* JAYA_FILESYSTEM */