atr.c

开发源代码的CPU卡的COS源程序。

/* ============================================================================
	Project Name : jayaCard
	Module Name  : proto/bios/init/atr.c
	Version : $Id: atr.c,v 1.14 2004/01/11 09:56:31 dgil Exp $

	Description: ATR (except for the first byte 0x3B)

    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
   012603 dgil	wrote it from scratch - today we have an entry point !
   031503 dgil	use BIOS_SEND() to output the ATR because this function can be
				called from the T=CL layer (see ATR_GET command).
   ============================================================================
*/

#include "precomp.h"

/* ============================================================================
	__bios_atr()

	algo:
		if opcode ATR
 			execute it
		else
			if ATR in EEPROM
				send it
			else
				build the default one calling cos_historical_bytes()
			endif
		endif
   ========================================================================= */

void __bios_atr(void)
{
	LOCAL(jbyte,i);

	/* opcode for ATR ? */
	if (BIOS_CALL_OPCODE(OPCODE_ATR)==JSEC_OK) return;

	/* valid ATR in EEPROM ? */
	HAL_EEPROM_READ(&u.bBlock[JAYA_BCRYPTO_INPUT0+0],ADDR_EEPROM_ATR,EEPROM_SIZEOF_ATR);
	if ((u.bBlock[JAYA_BCRYPTO_INPUT0+0]!=0) && (u.bBlock[JAYA_BCRYPTO_INPUT0+0]<=(EEPROM_SIZEOF_ATR-3))) {
		HAL_CRC_INIT();
		for (i=1;i<=u.bBlock[JAYA_BCRYPTO_INPUT0+0];i++) { HAL_CRC_COMPUTE(u.bBlock[JAYA_BCRYPTO_INPUT0+i]); }
		if ( (HAL_CRC_LO()==u.bBlock[JAYA_BCRYPTO_INPUT0+EEPROM_SIZEOF_ATR-2]) && (HAL_CRC_HI()==u.bBlock[JAYA_BCRYPTO_INPUT0+EEPROM_SIZEOF_ATR-1]) ) {
			goto send_hist;
		}
	}

	/* send our ATR with the user historical bytes */
	u.bBlock[JAYA_BCRYPTO_INPUT0+0] = (cos_historical_bytes(&u.bBlock[JAYA_BCRYPTO_INPUT0+1])&0x0F);
	BIOS_SEND(u.bBlock[JAYA_BCRYPTO_INPUT0+0] | 0x60); /* b8=!TD b7=TC b6=TB b5=!TA present */

	/* send other mandatory part */
	/* BIOS_SEND();	TA absent */
	BIOS_SEND(0x00);	/* TB = 00 VPP not required */
	BIOS_SEND(0x00);	/* TC = 00 no extra guard time */
	/* BIOS_SEND();	TD = absent */

	/* then send historical bytes with the check */
send_hist:
	for (i=1;i<=u.bBlock[JAYA_BCRYPTO_INPUT0+0];i++) { BIOS_SEND(u.bBlock[JAYA_BCRYPTO_INPUT0+i]); }
}

/* =========================================================================
	That's all folks !
   ========================================================================= */