/*
 * Support for ePass2003 smart cards
 *
 * Copyright (C) 2008, Weitao Sun <weitao@ftsafe.com>
 * Copyright (C) 2011, Xiaoshuo Wu <xiaoshuo@ftsafe.com>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#if HAVE_CONFIG_H
#include "config.h"
#endif
#ifdef ENABLE_SM		/* empty file without SM enabled */
#ifdef ENABLE_OPENSSL		/* empty file without openssl */

#include <ctype.h>
#include <stdlib.h>
#include <string.h>

#include <openssl/evp.h>
#include <openssl/sha.h>

#include "internal.h"
#include "asn1.h"

#include <ctype.h>
#include <stdlib.h>
#include <string.h>

#include <openssl/evp.h>
#include <openssl/sha.h>

#include "internal.h"
#include "asn1.h"
#include "cardctl.h"

static const struct sc_atr_table epass2003_atrs[] = {
	/* This is a FIPS certified card using SCP01 security messaging. */
	{"3B:9F:95:81:31:FE:9F:00:66:46:53:05:10:00:11:71:df:00:00:00:6a:82:5e",
	 "FF:FF:FF:FF:FF:00:FF:FF:FF:FF:FF:FF:00:00:00:ff:00:ff:ff:00:00:00:00",
	 "FTCOS/ePass2003", SC_CARD_TYPE_ENTERSAFE_FTCOS_EPASS2003, 0, NULL },
	{NULL, NULL, NULL, 0, 0, NULL}
};

static struct sc_card_operations *iso_ops = NULL;
static struct sc_card_operations epass2003_ops;

static struct sc_card_driver epass2003_drv = {
	"epass2003",
	"epass2003",
	&epass2003_ops,
	NULL, 0, NULL
};

#define KEY_TYPE_AES	0x01	/* FIPS mode */
#define KEY_TYPE_DES	0x02	/* Non-FIPS mode */

#define KEY_LEN_AES	16
#define KEY_LEN_DES	8
#define KEY_LEN_DES3	24
#define HASH_LEN	24

static unsigned char PIN_ID[2] = { ENTERSAFE_USER_PIN_ID, ENTERSAFE_SO_PIN_ID };

/*0x00:plain; 0x01:scp01 sm*/
#define SM_PLAIN				0x00
#define SM_SCP01				0x01

static unsigned char g_init_key_enc[16] = {
	0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C,
	0x0D, 0x0E, 0x0F, 0x10
};

static unsigned char g_init_key_mac[16] = {
	0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C,
	0x0D, 0x0E, 0x0F, 0x10
};

static unsigned char g_random[8] = {
	0xBF, 0xC3, 0x29, 0x11, 0xC7, 0x18, 0xC3, 0x40
};

typedef struct epass2003_exdata_st {
	unsigned char sm;		/* SM_PLAIN or SM_SCP01 */
	unsigned char smtype;		/* KEY_TYPE_AES or KEY_TYPE_DES */
	unsigned char sk_enc[16];	/* encrypt session key */
	unsigned char sk_mac[16];	/* mac session key */
	unsigned char icv_mac[16];	/* instruction counter vector(for sm) */
	unsigned char currAlg;		/* current Alg */
	unsigned int  ecAlgFlags; 	/* Ec Alg mechanism type*/
} epass2003_exdata;

#define REVERSE_ORDER4(x)	(			  \
		((unsigned long)x & 0xFF000000)>> 24	| \
		((unsigned long)x & 0x00FF0000)>>  8 	| \
		((unsigned long)x & 0x0000FF00)<<  8	| \
		((unsigned long)x & 0x000000FF)<< 24)


static const struct sc_card_error epass2003_errors[] = {
	{ 0x6200, SC_ERROR_CARD_CMD_FAILED,	"Warning: no information given, non-volatile memory is unchanged" },
	{ 0x6281, SC_ERROR_CORRUPTED_DATA,	"Part of returned data may be corrupted" },
	{ 0x6282, SC_ERROR_FILE_END_REACHED,	"End of file/record reached before reading Le bytes" },
	{ 0x6283, SC_ERROR_CARD_CMD_FAILED,	"Selected file invalidated" },
	{ 0x6284, SC_ERROR_CARD_CMD_FAILED,	"FCI not formatted according to ISO 7816-4" },

	{ 0x6300, SC_ERROR_PIN_CODE_INCORRECT,  "Authentication failed"}, 
	{ 0x63C1, SC_ERROR_PIN_CODE_INCORRECT,  "Authentication failed. One tries left"}, 
	{ 0x63C2, SC_ERROR_PIN_CODE_INCORRECT,  "Authentication failed. Two tries left"}, 
	{ 0x63C3, SC_ERROR_PIN_CODE_INCORRECT,  "Authentication failed"}, 
	{ 0x63C4, SC_ERROR_PIN_CODE_INCORRECT,  "Authentication failed"}, 
	{ 0x63C5, SC_ERROR_PIN_CODE_INCORRECT,  "Authentication failed"}, 
	{ 0x63C6, SC_ERROR_PIN_CODE_INCORRECT,  "Authentication failed"}, 
	{ 0x63C7, SC_ERROR_PIN_CODE_INCORRECT,  "Authentication failed"}, 
	{ 0x63C8, SC_ERROR_PIN_CODE_INCORRECT,  "Authentication failed"}, 
	{ 0x63C9, SC_ERROR_PIN_CODE_INCORRECT,  "Authentication failed"}, 
	{ 0x63CA, SC_ERROR_PIN_CODE_INCORRECT,  "Authentication failed"}, 

	{ 0x6381, SC_ERROR_CARD_CMD_FAILED,	"Warning: file filled up by last write" },

	{ 0x6581, SC_ERROR_MEMORY_FAILURE,	"Memory failure" },

	{ 0x6700, SC_ERROR_WRONG_LENGTH,	"Wrong length" },

	{ 0x6800, SC_ERROR_NO_CARD_SUPPORT,	"Functions in CLA not supported" },
	{ 0x6881, SC_ERROR_NO_CARD_SUPPORT,	"Logical channel not supported" },
	{ 0x6882, SC_ERROR_NO_CARD_SUPPORT,	"Secure messaging not supported" },

	{ 0x6900, SC_ERROR_NOT_ALLOWED,		"Command not allowed" },
	{ 0x6981, SC_ERROR_CARD_CMD_FAILED,	"Command incompatible with file structure" },
	{ 0x6982, SC_ERROR_SECURITY_STATUS_NOT_SATISFIED, "Security status not satisfied" },
	{ 0x6983, SC_ERROR_AUTH_METHOD_BLOCKED,	"Authentication method blocked" },
	{ 0x6984, SC_ERROR_REF_DATA_NOT_USABLE,	"Referenced data not usable" },
	{ 0x6985, SC_ERROR_NOT_ALLOWED,		"Conditions of use not satisfied" },
	{ 0x6986, SC_ERROR_NOT_ALLOWED,		"Command not allowed (no current EF)" },
	{ 0x6987, SC_ERROR_INCORRECT_PARAMETERS,"Expected SM data objects missing" },
	{ 0x6988, SC_ERROR_INCORRECT_PARAMETERS,"SM data objects incorrect" },

	{ 0x6A00, SC_ERROR_INCORRECT_PARAMETERS,"Wrong parameter(s) P1-P2" },
	{ 0x6A80, SC_ERROR_INCORRECT_PARAMETERS,"Incorrect parameters in the data field" },
	{ 0x6A81, SC_ERROR_NO_CARD_SUPPORT,	"Function not supported" },
	{ 0x6A82, SC_ERROR_FILE_NOT_FOUND,	"File not found" },
	{ 0x6A83, SC_ERROR_RECORD_NOT_FOUND,	"Record not found" },
	{ 0x6A84, SC_ERROR_NOT_ENOUGH_MEMORY,	"Not enough memory space in the file" },
	{ 0x6A85, SC_ERROR_INCORRECT_PARAMETERS,"Lc inconsistent with TLV structure" },
	{ 0x6A86, SC_ERROR_INCORRECT_PARAMETERS,"Incorrect parameters P1-P2" },
	{ 0x6A87, SC_ERROR_INCORRECT_PARAMETERS,"Lc inconsistent with P1-P2" },
	{ 0x6A88, SC_ERROR_DATA_OBJECT_NOT_FOUND,"Referenced data not found" },
	{ 0x6A89, SC_ERROR_FILE_ALREADY_EXISTS,  "File already exists"},
	{ 0x6A8A, SC_ERROR_FILE_ALREADY_EXISTS,  "DF name already exists"},

	{ 0x6B00, SC_ERROR_INCORRECT_PARAMETERS,"Wrong parameter(s) P1-P2" },
	{ 0x6D00, SC_ERROR_INS_NOT_SUPPORTED,	"Instruction code not supported or invalid" },
	{ 0x6E00, SC_ERROR_CLASS_NOT_SUPPORTED,	"Class not supported" },
	{ 0x6F00, SC_ERROR_CARD_CMD_FAILED,	"No precise diagnosis" },

	{ 0x9000,SC_SUCCESS,                       NULL }
};

static int epass2003_transmit_apdu(struct sc_card *card, struct sc_apdu *apdu);
static int epass2003_select_file(struct sc_card *card, const sc_path_t * in_path, sc_file_t ** file_out);
int epass2003_refresh(struct sc_card *card);
static int hash_data(const unsigned char *data, size_t datalen, unsigned char *hash, unsigned int mechanismType);

static int
epass2003_check_sw(struct sc_card *card, unsigned int sw1, unsigned int sw2)
{
	const int err_count = sizeof(epass2003_errors)/sizeof(epass2003_errors[0]);
	int i;

	/* Handle special cases here */
	if (sw1 == 0x6C) {
		sc_log(card->ctx, "Wrong length; correct length is %d", sw2);
		return SC_ERROR_WRONG_LENGTH;
	}


	for (i = 0; i < err_count; i++)   {
		if (epass2003_errors[i].SWs == ((sw1 << 8) | sw2)) {
			sc_log(card->ctx, "%s", epass2003_errors[i].errorstr);
			return epass2003_errors[i].errorno;
		}
	}

	sc_log(card->ctx, "Unknown SWs; SW1=%02X, SW2=%02X", sw1, sw2);
	return SC_ERROR_CARD_CMD_FAILED;
}

static int
sc_transmit_apdu_t(sc_card_t *card, sc_apdu_t *apdu)
{
	int r = sc_transmit_apdu(card, apdu);
	if ( ((0x69 == apdu->sw1) && (0x85 == apdu->sw2)) || ((0x69 == apdu->sw1) && (0x88 == apdu->sw2)))
	{
		epass2003_refresh(card);
		r = sc_transmit_apdu(card, apdu);
	}
	return r;
}

static int
openssl_enc(const EVP_CIPHER * cipher, const unsigned char *key, const unsigned char *iv,
		const unsigned char *input, size_t length, unsigned char *output)
{
	int r = SC_ERROR_INTERNAL;
	EVP_CIPHER_CTX * ctx = NULL;
	int outl = 0;
	int outl_tmp = 0;
	unsigned char iv_tmp[EVP_MAX_IV_LENGTH] = { 0 };

	memcpy(iv_tmp, iv, EVP_MAX_IV_LENGTH);
	ctx = EVP_CIPHER_CTX_new();
	if (ctx == NULL)
		goto out;
	EVP_EncryptInit_ex(ctx, cipher, NULL, key, iv_tmp);
	EVP_CIPHER_CTX_set_padding(ctx, 0);

	if (!EVP_EncryptUpdate(ctx, output, &outl, input, length))
		goto out;

	if (!EVP_EncryptFinal_ex(ctx, output + outl, &outl_tmp))
		goto out;

	r = SC_SUCCESS;
out:
	if (ctx)
		EVP_CIPHER_CTX_free(ctx);
	return r;
}

static int
openssl_dec(const EVP_CIPHER * cipher, const unsigned char *key, const unsigned char *iv,
		const unsigned char *input, size_t length, unsigned char *output)
{
	int r = SC_ERROR_INTERNAL;
	EVP_CIPHER_CTX * ctx = NULL;
	int outl = 0;
	int outl_tmp = 0;
	unsigned char iv_tmp[EVP_MAX_IV_LENGTH] = { 0 };

	memcpy(iv_tmp, iv, EVP_MAX_IV_LENGTH);
	ctx = EVP_CIPHER_CTX_new();
	if (ctx == NULL)
		goto out;
	EVP_DecryptInit_ex(ctx, cipher, NULL, key, iv_tmp);
	EVP_CIPHER_CTX_set_padding(ctx, 0);

	if (!EVP_DecryptUpdate(ctx, output, &outl, input, length))
		goto out;

	if (!EVP_DecryptFinal_ex(ctx, output + outl, &outl_tmp))
		goto out;

	r = SC_SUCCESS;
out:
	if (ctx)
		EVP_CIPHER_CTX_free(ctx);
	return r;
}


static int
aes128_encrypt_ecb(const unsigned char *key, int keysize,
		const unsigned char *input, size_t length, unsigned char *output)
{
	unsigned char iv[EVP_MAX_IV_LENGTH] = { 0 };
	return openssl_enc(EVP_aes_128_ecb(), key, iv, input, length, output);
}


static int
aes128_encrypt_cbc(const unsigned char *key, int keysize, unsigned char iv[16],
		const unsigned char *input, size_t length, unsigned char *output)
{
	return openssl_enc(EVP_aes_128_cbc(), key, iv, input, length, output);
}


static int
aes128_decrypt_cbc(const unsigned char *key, int keysize, unsigned char iv[16],
		const unsigned char *input, size_t length, unsigned char *output)
{
	return openssl_dec(EVP_aes_128_cbc(), key, iv, input, length, output);
}


static int
des3_encrypt_ecb(const unsigned char *key, int keysize,
		const unsigned char *input, int length, unsigned char *output)
{
	unsigned char iv[EVP_MAX_IV_LENGTH] = { 0 };
	unsigned char bKey[24] = { 0 };

	if (keysize == 16) {
		memcpy(&bKey[0], key, 16);
		memcpy(&bKey[16], key, 8);
	}
	else {
		memcpy(&bKey[0], key, 24);
	}

	return openssl_enc(EVP_des_ede3(), bKey, iv, input, length, output);
}


static int
des3_encrypt_cbc(const unsigned char *key, int keysize, unsigned char iv[EVP_MAX_IV_LENGTH],
		const unsigned char *input, size_t length, unsigned char *output)
{
	unsigned char bKey[24] = { 0 };

	if (keysize == 16) {
		memcpy(&bKey[0], key, 16);
		memcpy(&bKey[16], key, 8);
	}
	else {
		memcpy(&bKey[0], key, 24);
	}

	return openssl_enc(EVP_des_ede3_cbc(), bKey, iv, input, length, output);
}


static int
des3_decrypt_cbc(const unsigned char *key, int keysize, unsigned char iv[EVP_MAX_IV_LENGTH],
		const unsigned char *input, size_t length, unsigned char *output)
{
	unsigned char bKey[24] = { 0 };
	if (keysize == 16) {
		memcpy(&bKey[0], key, 16);
		memcpy(&bKey[16], key, 8);
	}
	else {
		memcpy(&bKey[0], key, 24);
	}

	return openssl_dec(EVP_des_ede3_cbc(), bKey, iv, input, length, output);
}


static int
des_encrypt_cbc(const unsigned char *key, int keysize, unsigned char iv[EVP_MAX_IV_LENGTH],
		const unsigned char *input, size_t length, unsigned char *output)
{
	return openssl_enc(EVP_des_cbc(), key, iv, input, length, output);
}


static int
des_decrypt_cbc(const unsigned char *key, int keysize, unsigned char iv[EVP_MAX_IV_LENGTH],
		const unsigned char *input, size_t length, unsigned char *output)
{
	return openssl_dec(EVP_des_cbc(), key, iv, input, length, output);
}


static int
openssl_dig(const EVP_MD * digest, const unsigned char *input, size_t length,
		unsigned char *output)
{
	int r = 0;
	EVP_MD_CTX *ctx = NULL;
	unsigned outl = 0;

	ctx = EVP_MD_CTX_create();
	if (ctx == NULL) {
		r = SC_ERROR_OUT_OF_MEMORY;
		goto err;
	}
		
	EVP_MD_CTX_init(ctx);
	EVP_DigestInit_ex(ctx, digest, NULL);
	if (!EVP_DigestUpdate(ctx, input, length)) {
		r = SC_ERROR_INTERNAL;
		goto err;
	}

	if (!EVP_DigestFinal_ex(ctx, output, &outl)) {
		r = SC_ERROR_INTERNAL;
		goto err;
	}
	r = SC_SUCCESS;
err:
	if (ctx)
		EVP_MD_CTX_destroy(ctx);

	return r;
}


static int
sha1_digest(const unsigned char *input, size_t length, unsigned char *output)
{
	return openssl_dig(EVP_sha1(), input, length, output);
}

static int
sha256_digest(const unsigned char *input, size_t length, unsigned char *output)
{
	return openssl_dig(EVP_sha256(), input, length, output);
}


static int
gen_init_key(struct sc_card *card, unsigned char *key_enc, unsigned char *key_mac,
		unsigned char *result, unsigned char key_type)
{
	int r;
	struct sc_apdu apdu;
	unsigned char data[256] = { 0 };
	unsigned char tmp_sm;
	unsigned long blocksize = 0;
	unsigned char cryptogram[256] = { 0 };	/* host cryptogram */
	unsigned char iv[16] = { 0 };
	epass2003_exdata *exdata = NULL;
	
	if (!card->drv_data) 
		return SC_ERROR_INVALID_ARGUMENTS;
	
	exdata = (epass2003_exdata *)card->drv_data;

	LOG_FUNC_CALLED(card->ctx);

	sc_format_apdu(card, &apdu, SC_APDU_CASE_4_SHORT, 0x50, 0x00, 0x00);
	apdu.cla = 0x80;
	apdu.lc = apdu.datalen = sizeof(g_random);
	apdu.data = g_random;	/* host random */
	apdu.le = apdu.resplen = 28;
	apdu.resp = result;	/* card random is result[12~19] */

	tmp_sm = exdata->sm;
	exdata->sm = SM_PLAIN;
	r = epass2003_transmit_apdu(card, &apdu);
	exdata->sm = tmp_sm;
	LOG_TEST_RET(card->ctx, r, "APDU gen_init_key failed");

	r = sc_check_sw(card, apdu.sw1, apdu.sw2);
	LOG_TEST_RET(card->ctx, r, "gen_init_key failed");

	/* Step 1 - Generate Derivation data */
	memcpy(data, &result[16], 4);
	memcpy(&data[4], g_random, 4);
	memcpy(&data[8], &result[12], 4);
	memcpy(&data[12], &g_random[4], 4);

	/* Step 2,3 - Create S-ENC/S-MAC Session Key */
	if (KEY_TYPE_AES == key_type) {
		aes128_encrypt_ecb(key_enc, 16, data, 16, exdata->sk_enc);
		aes128_encrypt_ecb(key_mac, 16, data, 16, exdata->sk_mac);
	}
	else {
		des3_encrypt_ecb(key_enc, 16, data, 16, exdata->sk_enc);
		des3_encrypt_ecb(key_mac, 16, data, 16, exdata->sk_mac);
	}

	memcpy(data, g_random, 8);
	memcpy(&data[8], &result[12], 8);
	data[16] = 0x80;
	blocksize = (key_type == KEY_TYPE_AES ? 16 : 8);
	memset(&data[17], 0x00, blocksize - 1);

	/* calculate host cryptogram */
	if (KEY_TYPE_AES == key_type)
		aes128_encrypt_cbc(exdata->sk_enc, 16, iv, data, 16 + blocksize, cryptogram);
	else
		des3_encrypt_cbc(exdata->sk_enc, 16, iv, data, 16 + blocksize, cryptogram);

	/* verify card cryptogram */
	if (0 != memcmp(&cryptogram[16], &result[20], 8))
		LOG_FUNC_RETURN(card->ctx, SC_ERROR_CARD_CMD_FAILED);

	LOG_FUNC_RETURN(card->ctx, SC_SUCCESS);
}


static int
verify_init_key(struct sc_card *card, unsigned char *ran_key, unsigned char key_type)
{
	int r;
	struct sc_apdu apdu;
	unsigned long blocksize = (key_type == KEY_TYPE_AES ? 16 : 8);
	unsigned char data[256] = { 0 };
	unsigned char cryptogram[256] = { 0 };	/* host cryptogram */
	unsigned char iv[16] = { 0 };
	unsigned char mac[256] = { 0 };
	unsigned long i;
	unsigned char tmp_sm;
	epass2003_exdata *exdata = NULL;

	if (!card->drv_data) 
		return SC_ERROR_INVALID_ARGUMENTS;
	exdata = (epass2003_exdata *)card->drv_data;

	LOG_FUNC_CALLED(card->ctx);

	memcpy(data, ran_key, 8);
	memcpy(&data[8], g_random, 8);
	data[16] = 0x80;
	memset(&data[17], 0x00, blocksize - 1);
	memset(iv, 0, 16);

	/* calculate host cryptogram */
	if (KEY_TYPE_AES == key_type) {
		aes128_encrypt_cbc(exdata->sk_enc, 16, iv, data, 16 + blocksize,
				   cryptogram);
	} else {
		des3_encrypt_cbc(exdata->sk_enc, 16, iv, data, 16 + blocksize,
				 cryptogram);
	}

	memset(data, 0, sizeof(data));
	memcpy(data, "\x84\x82\x03\x00\x10", 5);
	memcpy(&data[5], &cryptogram[16], 8);
	memcpy(&data[13], "\x80\x00\x00", 3);

	/* calculate mac icv */
	memset(iv, 0x00, 16);
	if (KEY_TYPE_AES == key_type) {
		aes128_encrypt_cbc(exdata->sk_mac, 16, iv, data, 16, mac);
		i = 0;
	} else {
		des3_encrypt_cbc(exdata->sk_mac, 16, iv, data, 16, mac);
		i = 8;
	}
	/* save mac icv */
	memset(exdata->icv_mac, 0x00, 16);
	memcpy(exdata->icv_mac, &mac[i], 8);

	/* verify host cryptogram */
	memcpy(data, &cryptogram[16], 8);
	memcpy(&data[8], &mac[i], 8);
	sc_format_apdu(card, &apdu, SC_APDU_CASE_3_SHORT, 0x82, 0x03, 0x00);
	apdu.cla = 0x84;
	apdu.lc = apdu.datalen = 16;
	apdu.data = data;
	tmp_sm = exdata->sm;
	exdata->sm = SM_PLAIN;
	r = epass2003_transmit_apdu(card, &apdu);
	exdata->sm = tmp_sm;
	LOG_TEST_RET(card->ctx, r,
		    "APDU verify_init_key failed");
	r = sc_check_sw(card, apdu.sw1, apdu.sw2);
	LOG_TEST_RET(card->ctx, r,
		    "verify_init_key failed");
	return r;
}


static int
mutual_auth(struct sc_card *card, unsigned char *key_enc,
			unsigned char *key_mac)
{
	struct sc_context *ctx = card->ctx;
	int r;
	unsigned char result[256] = { 0 };
	unsigned char ran_key[8] = { 0 };
	epass2003_exdata *exdata = NULL;

	if (!card->drv_data) 
		return SC_ERROR_INVALID_ARGUMENTS;
	exdata = (epass2003_exdata *)card->drv_data;

	LOG_FUNC_CALLED(ctx);

	r = gen_init_key(card, key_enc, key_mac, result, exdata->smtype);
	LOG_TEST_RET(ctx, r, "gen_init_key failed");
	memcpy(ran_key, &result[12], 8);

	r = verify_init_key(card, ran_key, exdata->smtype);
	LOG_TEST_RET(ctx, r, "verify_init_key failed");

	LOG_FUNC_RETURN(ctx, r);
}


int
epass2003_refresh(struct sc_card *card)
{
	int r = SC_SUCCESS;
	epass2003_exdata *exdata = NULL;

	if (!card->drv_data) 
		return SC_ERROR_INVALID_ARGUMENTS;

	exdata = (epass2003_exdata *)card->drv_data;

	if (exdata->sm) {
		card->sm_ctx.sm_mode = 0;
		r = mutual_auth(card, g_init_key_enc, g_init_key_mac);
		card->sm_ctx.sm_mode = SM_MODE_TRANSMIT;
		LOG_TEST_RET(card->ctx, r, "mutual_auth failed");
	}

	return r;
}


/* Data(TLV)=0x87|L|0x01+Cipher */
static int
construct_data_tlv(struct sc_card *card, struct sc_apdu *apdu, unsigned char *apdu_buf,
		unsigned char *data_tlv, size_t * data_tlv_len, const unsigned char key_type)
{
	size_t block_size = (KEY_TYPE_AES == key_type ? 16 : 8);
	unsigned char pad[4096] = { 0 };
	size_t pad_len;
	size_t tlv_more;	/* increased tlv length */
	unsigned char iv[16] = { 0 };
	epass2003_exdata *exdata = NULL;

	if (!card->drv_data) 
		return SC_ERROR_INVALID_ARGUMENTS;

	exdata = (epass2003_exdata *)card->drv_data;

	/* padding */
	apdu_buf[block_size] = 0x87;
	memcpy(pad, apdu->data, apdu->lc);
	pad[apdu->lc] = 0x80;
	if ((apdu->lc + 1) % block_size)
		pad_len = ((apdu->lc + 1) / block_size + 1) * block_size;
	else
		pad_len = apdu->lc + 1;

	/* encode Lc' */
	if (pad_len > 0x7E) {
		/* Lc' > 0x7E, use extended APDU */
		apdu_buf[block_size + 1] = 0x82;
		apdu_buf[block_size + 2] = (unsigned char)((pad_len + 1) / 0x100);
		apdu_buf[block_size + 3] = (unsigned char)((pad_len + 1) % 0x100);
		apdu_buf[block_size + 4] = 0x01;
		tlv_more = 5;
	}
	else {
		apdu_buf[block_size + 1] = (unsigned char)pad_len + 1;
		apdu_buf[block_size + 2] = 0x01;
		tlv_more = 3;
	}
	memcpy(data_tlv, &apdu_buf[block_size], tlv_more);

	/* encrypt Data */
	if (KEY_TYPE_AES == key_type)
		aes128_encrypt_cbc(exdata->sk_enc, 16, iv, pad, pad_len, apdu_buf + block_size + tlv_more);
	else
		des3_encrypt_cbc(exdata->sk_enc, 16, iv, pad, pad_len, apdu_buf + block_size + tlv_more);

	memcpy(data_tlv + tlv_more, apdu_buf + block_size + tlv_more, pad_len);
	*data_tlv_len = tlv_more + pad_len;
	return 0;
}


/* Le(TLV)=0x97|L|Le */
static int
construct_le_tlv(struct sc_apdu *apdu, unsigned char *apdu_buf, size_t data_tlv_len,
		unsigned char *le_tlv, size_t * le_tlv_len, const unsigned char key_type)
{
	size_t block_size = (KEY_TYPE_AES == key_type ? 16 : 8);

	*(apdu_buf + block_size + data_tlv_len) = 0x97;
	if (apdu->le > 0x7F) {
		/* Le' > 0x7E, use extended APDU */
		*(apdu_buf + block_size + data_tlv_len + 1) = 2;
		*(apdu_buf + block_size + data_tlv_len + 2) = (unsigned char)(apdu->le / 0x100);
		*(apdu_buf + block_size + data_tlv_len + 3) = (unsigned char)(apdu->le % 0x100);
		memcpy(le_tlv, apdu_buf + block_size + data_tlv_len, 4);
		*le_tlv_len = 4;
	}
	else {
		*(apdu_buf + block_size + data_tlv_len + 1) = 1;
		*(apdu_buf + block_size + data_tlv_len + 2) = (unsigned char)apdu->le;
		memcpy(le_tlv, apdu_buf + block_size + data_tlv_len, 3);
		*le_tlv_len = 3;
	}
	return 0;
}


/* MAC(TLV)=0x8e|0x08|MAC */
static int
construct_mac_tlv(struct sc_card *card, unsigned char *apdu_buf, size_t data_tlv_len, size_t le_tlv_len,
		unsigned char *mac_tlv, size_t * mac_tlv_len, const unsigned char key_type)
{
	size_t block_size = (KEY_TYPE_AES == key_type ? 16 : 8);
	unsigned char mac[4096] = { 0 };
	size_t mac_len;
	unsigned char icv[16] = { 0 };
	int i = (KEY_TYPE_AES == key_type ? 15 : 7);
	epass2003_exdata *exdata = NULL;

	if (!card->drv_data) 
		return SC_ERROR_INVALID_ARGUMENTS;

	exdata = (epass2003_exdata *)card->drv_data;

	if (0 == data_tlv_len && 0 == le_tlv_len) {
		mac_len = block_size;
	}
	else {
		/* padding */
		*(apdu_buf + block_size + data_tlv_len + le_tlv_len) = 0x80;
		if ((data_tlv_len + le_tlv_len + 1) % block_size)
			mac_len = (((data_tlv_len + le_tlv_len + 1) / block_size) +
					1) * block_size + block_size;

		else
			mac_len = data_tlv_len + le_tlv_len + 1 + block_size;

		memset((apdu_buf + block_size + data_tlv_len + le_tlv_len + 1),
		       0, (mac_len - (data_tlv_len + le_tlv_len + 1)));
	}

	/* increase icv */
	for (; i >= 0; i--) {
		if (exdata->icv_mac[i] == 0xff) {
			exdata->icv_mac[i] = 0;
		}
		else {
			exdata->icv_mac[i]++;
			break;
		}
	}

	/* calculate MAC */
	memset(icv, 0, sizeof(icv));
	memcpy(icv, exdata->icv_mac, 16);
	if (KEY_TYPE_AES == key_type) {
		aes128_encrypt_cbc(exdata->sk_mac, 16, icv, apdu_buf, mac_len, mac);
		memcpy(mac_tlv + 2, &mac[mac_len - 16], 8);
	}
	else {
		unsigned char iv[EVP_MAX_IV_LENGTH] = { 0 };
		unsigned char tmp[8] = { 0 };
		des_encrypt_cbc(exdata->sk_mac, 8, icv, apdu_buf, mac_len, mac);
		des_decrypt_cbc(&exdata->sk_mac[8], 8, iv, &mac[mac_len - 8], 8, tmp);
		memset(iv, 0x00, sizeof iv);
		des_encrypt_cbc(exdata->sk_mac, 8, iv, tmp, 8, mac_tlv + 2);
	}

	*mac_tlv_len = 2 + 8;
	return 0;
}


/* According to GlobalPlatform Card Specification's SCP01
 * encode APDU from
 * CLA INS P1 P2 [Lc] Data [Le]
 * to
 * CLA INS P1 P2 Lc' Data' [Le]
 * where
 * Data'=Data(TLV)+Le(TLV)+MAC(TLV) */
static int
encode_apdu(struct sc_card *card, struct sc_apdu *plain, struct sc_apdu *sm,
		unsigned char *apdu_buf, size_t * apdu_buf_len)
{
	size_t block_size = 0;
	unsigned char dataTLV[4096] = { 0 };
	size_t data_tlv_len = 0;
	unsigned char le_tlv[256] = { 0 };
	size_t le_tlv_len = 0;
	size_t mac_tlv_len = 10;
	size_t tmp_lc = 0;
	size_t tmp_le = 0;
	unsigned char mac_tlv[256] = { 0 };
	epass2003_exdata *exdata = NULL;

	mac_tlv[0] = 0x8E;
	mac_tlv[1] = 8;
	/* size_t plain_le = 0; */
	if (!card->drv_data) 
		return SC_ERROR_INVALID_ARGUMENTS;
	exdata = (epass2003_exdata*)card->drv_data;
	block_size = (KEY_TYPE_DES == exdata->smtype ? 16 : 8);

	sm->cse = SC_APDU_CASE_4_SHORT;
	apdu_buf[0] = (unsigned char)plain->cla;
	apdu_buf[1] = (unsigned char)plain->ins;
	apdu_buf[2] = (unsigned char)plain->p1;
	apdu_buf[3] = (unsigned char)plain->p2;
	/* plain_le = plain->le; */
	/* padding */
	apdu_buf[4] = 0x80;
	memset(&apdu_buf[5], 0x00, block_size - 5);

	/* Data -> Data' */
	if (plain->lc != 0)
		if (0 != construct_data_tlv(card, plain, apdu_buf, dataTLV, &data_tlv_len, exdata->smtype))
			return -1;

	if (plain->le != 0 || (plain->le == 0 && plain->resplen != 0))
		if (0 != construct_le_tlv(plain, apdu_buf, data_tlv_len, le_tlv,
				     &le_tlv_len, exdata->smtype))
			return -1;

	if (0 != construct_mac_tlv(card, apdu_buf, data_tlv_len, le_tlv_len, mac_tlv, &mac_tlv_len, exdata->smtype))
		return -1;

	memset(apdu_buf + 4, 0, *apdu_buf_len - 4);
	sm->lc = sm->datalen = data_tlv_len + le_tlv_len + mac_tlv_len;
	if (sm->lc > 0xFF) {
		sm->cse = SC_APDU_CASE_4_EXT;
		apdu_buf[4] = (unsigned char)((sm->lc) / 0x10000);
		apdu_buf[5] = (unsigned char)(((sm->lc) / 0x100) % 0x100);
		apdu_buf[6] = (unsigned char)((sm->lc) % 0x100);
		tmp_lc = 3;
	}
	else {
		apdu_buf[4] = (unsigned char)sm->lc;
		tmp_lc = 1;
	}

	memcpy(apdu_buf + 4 + tmp_lc, dataTLV, data_tlv_len);
	memcpy(apdu_buf + 4 + tmp_lc + data_tlv_len, le_tlv, le_tlv_len);
	memcpy(apdu_buf + 4 + tmp_lc + data_tlv_len + le_tlv_len, mac_tlv, mac_tlv_len);
	memcpy((unsigned char *)sm->data, apdu_buf + 4 + tmp_lc, sm->datalen);
	*apdu_buf_len = 0;

	if (4 == le_tlv_len) {
		sm->cse = SC_APDU_CASE_4_EXT;
		*(apdu_buf + 4 + tmp_lc + sm->lc) = (unsigned char)(plain->le / 0x100);
		*(apdu_buf + 4 + tmp_lc + sm->lc + 1) = (unsigned char)(plain->le % 0x100);
		tmp_le = 2;
	}
	else if (3 == le_tlv_len) {
		*(apdu_buf + 4 + tmp_lc + sm->lc) = (unsigned char)plain->le;
		tmp_le = 1;
	}

	*apdu_buf_len += 4 + tmp_lc + data_tlv_len + le_tlv_len + mac_tlv_len + tmp_le;
	/* sm->le = calc_le(plain_le); */
	return 0;
}


static int
epass2003_sm_wrap_apdu(struct sc_card *card, struct sc_apdu *plain, struct sc_apdu *sm)
{
	unsigned char buf[4096] = { 0 };	/* APDU buffer */
	size_t buf_len = sizeof(buf);
	epass2003_exdata *exdata = NULL;
	
	if (!card->drv_data) 
		return SC_ERROR_INVALID_ARGUMENTS;
	
	exdata = (epass2003_exdata *)card->drv_data;

	LOG_FUNC_CALLED(card->ctx);

	if (exdata->sm)
		plain->cla |= 0x0C;

	sm->cse = plain->cse;
	sm->cla = plain->cla;
	sm->ins = plain->ins;
	sm->p1 = plain->p1;
	sm->p2 = plain->p2;
	sm->lc = plain->lc;
	sm->le = plain->le;
	sm->control = plain->control;
	sm->flags = plain->flags;

	switch (sm->cla & 0x0C) {
	case 0x00:
	case 0x04:
		sm->datalen = plain->datalen;
		memcpy((void *)sm->data, plain->data, plain->datalen);
		sm->resplen = plain->resplen;
		memcpy(sm->resp, plain->resp, plain->resplen);
		break;
	case 0x0C:
		memset(buf, 0, sizeof(buf));
		if (0 != encode_apdu(card, plain, sm, buf, &buf_len))
			return SC_ERROR_CARD_CMD_FAILED;
		break;
	default:
		return SC_ERROR_INCORRECT_PARAMETERS;
	}

	return SC_SUCCESS;
}


/* According to GlobalPlatform Card Specification's SCP01
 * decrypt APDU response from
 * ResponseData' SW1 SW2
 * to
 * ResponseData SW1 SW2
 * where
 * ResponseData'=Data(TLV)+SW12(TLV)+MAC(TLV)
 * where
 * Data(TLV)=0x87|L|Cipher
 * SW12(TLV)=0x99|0x02|SW1+SW2
 * MAC(TLV)=0x8e|0x08|MAC */
static int
decrypt_response(struct sc_card *card, unsigned char *in, size_t inlen, unsigned char *out, size_t * out_len)
{
	size_t cipher_len;
	size_t i;
	unsigned char iv[16] = { 0 };
	unsigned char plaintext[4096] = { 0 };
	epass2003_exdata *exdata = NULL;

	if (!card->drv_data) 
		return SC_ERROR_INVALID_ARGUMENTS;

	exdata = (epass2003_exdata *)card->drv_data;

	/* no cipher */
	if (in[0] == 0x99)
		return 0;

	/* parse cipher length */
	if (0x01 == in[2] && 0x82 != in[1]) {
		cipher_len = in[1];
		i = 3;
	}
	else if (0x01 == in[3] && 0x81 == in[1]) {
		cipher_len = in[2];
		i = 4;
	}
	else if (0x01 == in[4] && 0x82 == in[1]) {
		cipher_len = in[2] * 0x100;
		cipher_len += in[3];
		i = 5;
	}
	else {
		return -1;
	}

	if (cipher_len < 2 || i+cipher_len > inlen || cipher_len > sizeof plaintext)
		return -1;

	/* decrypt */
	if (KEY_TYPE_AES == exdata->smtype)
		aes128_decrypt_cbc(exdata->sk_enc, 16, iv, &in[i], cipher_len - 1, plaintext);
	else
		des3_decrypt_cbc(exdata->sk_enc, 16, iv, &in[i], cipher_len - 1, plaintext);

	/* unpadding */
	while (0x80 != plaintext[cipher_len - 2] && (cipher_len > 2))
		cipher_len--;

	if (2 == cipher_len || *out_len < cipher_len - 2)
		return -1;

	memcpy(out, plaintext, cipher_len - 2);
	*out_len = cipher_len - 2;
	return 0;
}


static int
epass2003_sm_unwrap_apdu(struct sc_card *card, struct sc_apdu *sm, struct sc_apdu *plain)
{
	int r;
	size_t len = 0;
	epass2003_exdata *exdata = NULL;

	if (!card->drv_data) 
		return SC_ERROR_INVALID_ARGUMENTS;

	exdata = (epass2003_exdata *)card->drv_data;

	LOG_FUNC_CALLED(card->ctx);

	r = sc_check_sw(card, sm->sw1, sm->sw2);
	if (r == SC_SUCCESS) {
		if (exdata->sm) {
			len = plain->resplen;
			if (0 != decrypt_response(card, sm->resp, sm->resplen, plain->resp, &len))
				return SC_ERROR_CARD_CMD_FAILED;
		}
		else {
			memcpy(plain->resp, sm->resp, sm->resplen);
			len = sm->resplen;
		}
	}

	plain->resplen = len;
	plain->sw1 = sm->sw1;
	plain->sw2 = sm->sw2;

	sc_log(card->ctx,
	       "unwrapped APDU: resplen %"SC_FORMAT_LEN_SIZE_T"u, SW %02X%02X",
	       plain->resplen, plain->sw1, plain->sw2);
	LOG_FUNC_RETURN(card->ctx, SC_SUCCESS);
}


static int
epass2003_sm_free_wrapped_apdu(struct sc_card *card,
		struct sc_apdu *plain, struct sc_apdu **sm_apdu)
{
	struct sc_context *ctx = card->ctx;
	int rv = SC_SUCCESS;

	LOG_FUNC_CALLED(ctx);
	if (!sm_apdu)
		LOG_FUNC_RETURN(ctx, SC_ERROR_INVALID_ARGUMENTS);
	if (!(*sm_apdu))
		LOG_FUNC_RETURN(ctx, SC_SUCCESS);


	if (plain)
		rv = epass2003_sm_unwrap_apdu(card, *sm_apdu, plain);

	if ((*sm_apdu)->data) {
		unsigned char * p = (unsigned char *)((*sm_apdu)->data);
		free(p);
	}
	if ((*sm_apdu)->resp) {
		free((*sm_apdu)->resp);
	}

	free(*sm_apdu);
	*sm_apdu = NULL;

	LOG_FUNC_RETURN(ctx, rv);
}


static int
epass2003_sm_get_wrapped_apdu(struct sc_card *card,
		struct sc_apdu *plain, struct sc_apdu **sm_apdu)
{
	struct sc_context *ctx = card->ctx;
	struct sc_apdu *apdu = NULL;
	int rv;

	LOG_FUNC_CALLED(ctx);
	if (!plain || !sm_apdu)
		LOG_FUNC_RETURN(ctx, SC_ERROR_INVALID_ARGUMENTS);

	*sm_apdu = NULL;
	//construct new SM apdu from original apdu
	apdu = calloc(1, sizeof(struct sc_apdu));
	if (!apdu) {
		rv = SC_ERROR_OUT_OF_MEMORY;
		goto err;
	}
	apdu->data = calloc (1, SC_MAX_EXT_APDU_BUFFER_SIZE);
	if (!apdu->data) {
		rv = SC_ERROR_OUT_OF_MEMORY;
		goto err;
	}
	apdu->resp = calloc (1, SC_MAX_EXT_APDU_BUFFER_SIZE);
	if (!apdu->resp) {
		rv = SC_ERROR_OUT_OF_MEMORY;
		goto err;
	}
	apdu->datalen = SC_MAX_EXT_APDU_BUFFER_SIZE;
	apdu->resplen = SC_MAX_EXT_APDU_BUFFER_SIZE;

	rv = epass2003_sm_wrap_apdu(card, plain, apdu);
	if (rv)   {
		rv = epass2003_sm_free_wrapped_apdu(card, NULL, &apdu);
		if (rv < 0)
			goto err;
	}

	*sm_apdu = apdu;
	apdu = NULL;
err:
	if (apdu) {
		free((unsigned char *) apdu->data);
		free(apdu->resp);
		free(apdu);
		apdu = NULL;
	}
	LOG_FUNC_RETURN(ctx, rv);
}


static int
epass2003_transmit_apdu(struct sc_card *card, struct sc_apdu *apdu)
{
	int r;

	LOG_FUNC_CALLED(card->ctx);

	r = sc_transmit_apdu_t(card, apdu);
	LOG_TEST_RET(card->ctx, r, "APDU transmit failed");

	return r;
}


static int
get_data(struct sc_card *card, unsigned char type, unsigned char *data, size_t datalen)
{
	int r;
	struct sc_apdu apdu;
	unsigned char resp[SC_MAX_APDU_BUFFER_SIZE] = { 0 };
	size_t resplen = SC_MAX_APDU_BUFFER_SIZE;
	epass2003_exdata *exdata = NULL;

	if (!card->drv_data) 
		return SC_ERROR_INVALID_ARGUMENTS;

	exdata = (epass2003_exdata *)card->drv_data;

	LOG_FUNC_CALLED(card->ctx);

	sc_format_apdu(card, &apdu, SC_APDU_CASE_2_SHORT, 0xca, 0x01, type);
	apdu.resp = resp;
	apdu.le = 0;
	apdu.resplen = resplen;
	if (0x86 == type) {
		/* No SM temporarily */
		unsigned char tmp_sm = exdata->sm;
		exdata->sm = SM_PLAIN;
		r = sc_transmit_apdu(card, &apdu);
		exdata->sm = tmp_sm;
	}
	else {
		r = sc_transmit_apdu_t(card, &apdu);
	}
	LOG_TEST_RET(card->ctx, r, "APDU get_data failed");
	r = sc_check_sw(card, apdu.sw1, apdu.sw2);
	LOG_TEST_RET(card->ctx, r, "get_data failed");

	memcpy(data, resp, datalen);
	return r;
}

/* card driver functions */

static int epass2003_match_card(struct sc_card *card)
{
	int r;

	LOG_FUNC_CALLED(card->ctx);
	r = _sc_match_atr(card, epass2003_atrs, &card->type);
	if (r < 0)
		return 0;

	return 1;
}


static int
epass2003_init(struct sc_card *card)
{
	unsigned int flags;
	unsigned int ext_flags;
	unsigned char data[SC_MAX_APDU_BUFFER_SIZE] = { 0 };
	size_t datalen = SC_MAX_APDU_BUFFER_SIZE;
	epass2003_exdata *exdata = NULL;
	void *old_drv_data = card->drv_data;

	LOG_FUNC_CALLED(card->ctx);

	card->name = "epass2003";
	card->cla = 0x00;
	exdata = (epass2003_exdata *)calloc(1, sizeof(epass2003_exdata));
	if (!exdata)
		return SC_ERROR_OUT_OF_MEMORY;

	card->drv_data = exdata;

	exdata->sm = SM_SCP01;

	/* decide FIPS/Non-FIPS mode */
	if (SC_SUCCESS != get_data(card, 0x86, data, datalen)) {
		free(exdata);
		card->drv_data = old_drv_data;
		return SC_ERROR_INVALID_CARD;
	}

	if (0x01 == data[2])
		exdata->smtype = KEY_TYPE_AES;
	else
		exdata->smtype = KEY_TYPE_DES;

	if (0x84 == data[14]) {
		if (0x00 == data[16]) { 
			exdata->sm = SM_PLAIN;
		}
	}


	/* mutual authentication */
	card->max_recv_size = 0xD8;
	card->max_send_size = 0xE8;

	card->sm_ctx.ops.open = epass2003_refresh;
	card->sm_ctx.ops.get_sm_apdu = epass2003_sm_get_wrapped_apdu;
	card->sm_ctx.ops.free_sm_apdu = epass2003_sm_free_wrapped_apdu;

	/* FIXME (VT): rather then set/unset 'g_sm', better to implement filter for APDUs to be wrapped */
	epass2003_refresh(card);

	card->sm_ctx.sm_mode = SM_MODE_TRANSMIT;

	flags = SC_ALGORITHM_ONBOARD_KEY_GEN | SC_ALGORITHM_RSA_RAW | SC_ALGORITHM_RSA_HASH_NONE;

	_sc_card_add_rsa_alg(card, 512, flags, 0);
	_sc_card_add_rsa_alg(card, 768, flags, 0);
	_sc_card_add_rsa_alg(card, 1024, flags, 0);
	_sc_card_add_rsa_alg(card, 2048, flags, 0);

	//set EC Alg Flags
	flags = SC_ALGORITHM_ONBOARD_KEY_GEN|SC_ALGORITHM_ECDSA_HASH_SHA1|SC_ALGORITHM_ECDSA_HASH_SHA256|SC_ALGORITHM_ECDSA_HASH_NONE|SC_ALGORITHM_ECDSA_RAW;
	ext_flags = 0;
	_sc_card_add_ec_alg(card, 256, flags, ext_flags, NULL);

	card->caps = SC_CARD_CAP_RNG | SC_CARD_CAP_APDU_EXT;

	LOG_FUNC_RETURN(card->ctx, SC_SUCCESS);
}

static int
epass2003_finish(sc_card_t *card)
{
	epass2003_exdata *exdata = (epass2003_exdata *)card->drv_data;

	if (exdata)
		free(exdata);
	return SC_SUCCESS;
}

/* COS implement SFI as lower 5 bits of FID, and not allow same SFI at the
 * same DF, so use hook functions to increase/decrease FID by 0x20 */
static int
epass2003_hook_path(struct sc_path *path, int inc)
{
	u8 fid_h = path->value[path->len - 2];
	u8 fid_l = path->value[path->len - 1];

	switch (fid_h) {
	case 0x29:
	case 0x30:
	case 0x31:
	case 0x32:
	case 0x33:
	case 0x34:
		if (inc)
			fid_l = fid_l * FID_STEP;
		else
			fid_l = fid_l / FID_STEP;
		path->value[path->len - 1] = fid_l;
		return 1;
	default:
		break;
	}
	return 0;
}


static void
epass2003_hook_file(struct sc_file *file, int inc)
{
	int fidl = file->id & 0xff;
	int fidh = file->id & 0xff00;
	if (epass2003_hook_path(&file->path, inc)) {
		if (inc)
			file->id = fidh + fidl * FID_STEP;
		else
			file->id = fidh + fidl / FID_STEP;
	}
}


static int
epass2003_select_fid_(struct sc_card *card, sc_path_t * in_path, sc_file_t ** file_out)
{
	struct sc_apdu apdu;
	u8 buf[SC_MAX_APDU_BUFFER_SIZE] = { 0 };
	u8 pathbuf[SC_MAX_PATH_SIZE], *path = pathbuf;
	int r, pathlen;
	sc_file_t *file = NULL;

	epass2003_hook_path(in_path, 1);
	memcpy(path, in_path->value, in_path->len);
	pathlen = in_path->len;

	sc_format_apdu(card, &apdu, SC_APDU_CASE_4_SHORT, 0xA4, 0x00, 0x00);

	switch (in_path->type) {
	case SC_PATH_TYPE_FILE_ID:
		apdu.p1 = 0;
		if (pathlen != 2)
			return SC_ERROR_INVALID_ARGUMENTS;
		break;
	default:
		LOG_FUNC_RETURN(card->ctx, SC_ERROR_INVALID_ARGUMENTS);
	}
	apdu.p2 = 0;		/* first record, return FCI */
	apdu.lc = pathlen;
	apdu.data = path;
	apdu.datalen = pathlen;

	if (file_out != NULL) {
		apdu.resp = buf;
		apdu.resplen = sizeof(buf);
		apdu.le = 0;
	}
	else   {
		apdu.cse = (apdu.lc == 0) ? SC_APDU_CASE_1 : SC_APDU_CASE_3_SHORT;
	}

	if (path[0] == 0x29) {	/* TODO:0x29 accords with FID prefix in profile  */
		/* Not allowed to select private key file, so fake fci. */
		/* 62 16 82 02 11 00 83 02 29 00 85 02 08 00 86 08 FF 90 90 90 FF FF FF FF */
		apdu.resplen = 0x18;
		memcpy(apdu.resp,
		       "\x6f\x16\x82\x02\x11\x00\x83\x02\x29\x00\x85\x02\x08\x00\x86\x08\xff\x90\x90\x90\xff\xff\xff\xff",
		       apdu.resplen);
		apdu.resp[9] = path[1];
		apdu.sw1 = 0x90;
		apdu.sw2 = 0x00;
	}
	else {
		r = sc_transmit_apdu_t(card, &apdu);
		LOG_TEST_RET(card->ctx, r, "APDU transmit failed");
	}

	if (file_out == NULL) {
		if (apdu.sw1 == 0x61)
			LOG_FUNC_RETURN(card->ctx, 0);
		LOG_FUNC_RETURN(card->ctx, sc_check_sw(card, apdu.sw1, apdu.sw2));
	}

	r = sc_check_sw(card, apdu.sw1, apdu.sw2);
	if (r)
		LOG_FUNC_RETURN(card->ctx, r);
	if (apdu.resplen < 2)
		LOG_FUNC_RETURN(card->ctx, SC_ERROR_UNKNOWN_DATA_RECEIVED);

	switch (apdu.resp[0]) {
	case 0x6F:
		file = sc_file_new();
		if (file == NULL)
			LOG_FUNC_RETURN(card->ctx, SC_ERROR_OUT_OF_MEMORY);
		file->path = *in_path;
		if (card->ops->process_fci == NULL) {
			sc_file_free(file);
			LOG_FUNC_RETURN(card->ctx, SC_ERROR_NOT_SUPPORTED);
		}

		if ((size_t) apdu.resp[1] + 2 <= apdu.resplen)
			card->ops->process_fci(card, file, apdu.resp + 2, apdu.resp[1]);
		epass2003_hook_file(file, 0);
		*file_out = file;
		break;
	case 0x00:		/* proprietary coding */
		LOG_FUNC_RETURN(card->ctx, SC_ERROR_UNKNOWN_DATA_RECEIVED);
		break;
	default:
		LOG_FUNC_RETURN(card->ctx, SC_ERROR_UNKNOWN_DATA_RECEIVED);
	}
	return 0;
}


static int
epass2003_select_fid(struct sc_card *card, unsigned int id_hi, unsigned int id_lo,
		sc_file_t ** file_out)
{
	int r;
	sc_file_t *file = NULL;
	sc_path_t path;

	memset(&path, 0, sizeof(path));
	path.type = SC_PATH_TYPE_FILE_ID;
	path.value[0] = id_hi;
	path.value[1] = id_lo;
	path.len = 2;

	r = epass2003_select_fid_(card, &path, &file);
	LOG_TEST_RET(card->ctx, r, "APDU transmit failed");

	/* update cache */
	if (file && file->type == SC_FILE_TYPE_DF) {
		card->cache.current_path.type = SC_PATH_TYPE_PATH;
		card->cache.current_path.value[0] = 0x3f;
		card->cache.current_path.value[1] = 0x00;
		if (id_hi == 0x3f && id_lo == 0x00) {
			card->cache.current_path.len = 2;
		}
		else {
			card->cache.current_path.len = 4;
			card->cache.current_path.value[2] = id_hi;
			card->cache.current_path.value[3] = id_lo;
		}
	}

	if (file_out) {
		*file_out = file;
	} else {
		sc_file_free(file);
	}

	LOG_FUNC_RETURN(card->ctx, SC_SUCCESS);
}


static int
epass2003_select_aid(struct sc_card *card, const sc_path_t * in_path, sc_file_t ** file_out)
{
	int r = 0;

	if (card->cache.valid
			&& card->cache.current_path.type == SC_PATH_TYPE_DF_NAME
			&& card->cache.current_path.len == in_path->len
			&& memcmp(card->cache.current_path.value, in_path->value, in_path->len) == 0) {
		if (file_out) {
			*file_out = sc_file_new();
			if (!file_out)
				LOG_FUNC_RETURN(card->ctx, SC_ERROR_OUT_OF_MEMORY);
		}
	}
	else {
		r = iso_ops->select_file(card, in_path, file_out);
		LOG_TEST_RET(card->ctx, r, "APDU transmit failed");

		/* update cache */
		card->cache.current_path.type = SC_PATH_TYPE_DF_NAME;
		card->cache.current_path.len = in_path->len;
		memcpy(card->cache.current_path.value, in_path->value, in_path->len);
	}

	if (file_out) {
		sc_file_t *file = *file_out;

		file->type = SC_FILE_TYPE_DF;
		file->ef_structure = SC_FILE_EF_UNKNOWN;
		file->path.len = 0;
		file->size = 0;
		/* AID */
		memcpy(file->name, in_path->value, in_path->len);
		file->namelen = in_path->len;
		file->id = 0x0000;
	}

	LOG_FUNC_RETURN(card->ctx, r);
}


static int
epass2003_select_path(struct sc_card *card, const u8 pathbuf[16], const size_t len,
		sc_file_t ** file_out)
{
	u8 n_pathbuf[SC_MAX_PATH_SIZE];
	const u8 *path = pathbuf;
	size_t pathlen = len;
	int bMatch = -1;
	unsigned int i;
	int r;

	if (pathlen % 2 != 0 || pathlen > 6 || pathlen <= 0)
		LOG_FUNC_RETURN(card->ctx, SC_ERROR_INVALID_ARGUMENTS);

	/* if pathlen == 6 then the first FID must be MF (== 3F00) */
	if (pathlen == 6 && (path[0] != 0x3f || path[1] != 0x00))
		LOG_FUNC_RETURN(card->ctx, SC_ERROR_INVALID_ARGUMENTS);

	/* unify path (the first FID should be MF) */
	if (path[0] != 0x3f || path[1] != 0x00) {
		n_pathbuf[0] = 0x3f;
		n_pathbuf[1] = 0x00;
		memcpy(n_pathbuf+2, path, pathlen);
		path = n_pathbuf;
		pathlen += 2;
	}

	/* check current working directory */
	if (card->cache.valid
			&& card->cache.current_path.type == SC_PATH_TYPE_PATH
			&& card->cache.current_path.len >= 2
			&& card->cache.current_path.len <= pathlen) {
		bMatch = 0;
		for (i = 0; i < card->cache.current_path.len; i += 2)
			if (card->cache.current_path.value[i] == path[i]
					&& card->cache.current_path.value[i + 1] == path[i + 1])
				bMatch += 2;
	}

	if (card->cache.valid && bMatch > 2) {
		if (pathlen - bMatch == 2) {
			/* we are in the right directory */
			return epass2003_select_fid(card, path[bMatch], path[bMatch + 1], file_out);
		}
		else if (pathlen - bMatch > 2) {
			/* two more steps to go */
			sc_path_t new_path;

			/* first step: change directory */
			r = epass2003_select_fid(card, path[bMatch], path[bMatch + 1], NULL);
			LOG_TEST_RET(card->ctx, r, "SELECT FILE (DF-ID) failed");

			new_path.type = SC_PATH_TYPE_PATH;
			new_path.len = pathlen - bMatch - 2;
			memcpy(new_path.value, &(path[bMatch + 2]), new_path.len);

			/* final step: select file */
			return epass2003_select_file(card, &new_path, file_out);
		}
		else {	/* if (bMatch - pathlen == 0) */

			/* done: we are already in the
			 * requested directory */
			sc_log(card->ctx, "cache hit\n");
			/* copy file info (if necessary) */
			if (file_out) {
				sc_file_t *file = sc_file_new();
				if (!file)
					LOG_FUNC_RETURN(card->ctx, SC_ERROR_OUT_OF_MEMORY);
				file->id = (path[pathlen - 2] << 8) + path[pathlen - 1];
				file->path = card->cache.current_path;
				file->type = SC_FILE_TYPE_DF;
				file->ef_structure = SC_FILE_EF_UNKNOWN;
				file->size = 0;
				file->namelen = 0;
				file->magic = SC_FILE_MAGIC;
				*file_out = file;
			}
			/* nothing left to do */
			return SC_SUCCESS;
		}
	}
	else {
		/* no usable cache */
		for (i = 0; i < pathlen - 2; i += 2) {
			r = epass2003_select_fid(card, path[i], path[i + 1], NULL);
			LOG_TEST_RET(card->ctx, r, "SELECT FILE (DF-ID) failed");
		}

		return epass2003_select_fid(card, path[pathlen - 2], path[pathlen - 1], file_out);
	}
}


static int
epass2003_select_file(struct sc_card *card, const sc_path_t * in_path,
		sc_file_t ** file_out)
{
	int r;
	char pbuf[SC_MAX_PATH_STRING_SIZE];

	LOG_FUNC_CALLED(card->ctx);

	r = sc_path_print(pbuf, sizeof(pbuf), &card->cache.current_path);
	if (r != SC_SUCCESS)
		pbuf[0] = '\0';

	sc_log(card->ctx,
	       "current path (%s, %s): %s (len: %"SC_FORMAT_LEN_SIZE_T"u)\n",
	       card->cache.current_path.type == SC_PATH_TYPE_DF_NAME ?
	       "aid" : "path",
	       card->cache.valid ? "valid" : "invalid", pbuf,
	       card->cache.current_path.len);

	switch (in_path->type) {
	case SC_PATH_TYPE_FILE_ID:
		if (in_path->len != 2)
			LOG_FUNC_RETURN(card->ctx, SC_ERROR_INVALID_ARGUMENTS);
		return epass2003_select_fid(card, in_path->value[0], in_path->value[1], file_out);
	case SC_PATH_TYPE_DF_NAME:
		return epass2003_select_aid(card, in_path, file_out);
	case SC_PATH_TYPE_PATH:
		return epass2003_select_path(card, in_path->value, in_path->len, file_out);
	default:
		LOG_FUNC_RETURN(card->ctx, SC_ERROR_INVALID_ARGUMENTS);
	}
}


static int
epass2003_set_security_env(struct sc_card *card, const sc_security_env_t * env, int se_num)
{
	struct sc_apdu apdu;
	u8 sbuf[SC_MAX_APDU_BUFFER_SIZE] = { 0 };
	u8 *p;
	unsigned short fid = 0;
	int r, locked = 0;
	epass2003_exdata *exdata = NULL;

	if (!card->drv_data)
		return SC_ERROR_INVALID_ARGUMENTS;

	exdata = (epass2003_exdata *)card->drv_data;

	sc_format_apdu(card, &apdu, SC_APDU_CASE_3_SHORT, 0x22, 0x41, 0);

	p = sbuf;
	*p++ = 0x80;		/* algorithm reference */
	*p++ = 0x01;
	*p++ = 0x84;

	*p++ = 0x81;
	*p++ = 0x02;

	fid = 0x2900;
	fid += (unsigned short)(0x20 * (env->key_ref[0] & 0xff));
	*p++ = fid >> 8;
	*p++ = fid & 0xff;
	r = p - sbuf;
	apdu.lc = r;
	apdu.datalen = r;
	apdu.data = sbuf;

	if (env->algorithm == SC_ALGORITHM_EC)
	{
		apdu.p2 = 0xB6;
		exdata->currAlg = SC_ALGORITHM_EC;
		if(env->algorithm_flags & SC_ALGORITHM_ECDSA_HASH_SHA1)
		{
			sbuf[2] = 0x91;
			exdata->ecAlgFlags = SC_ALGORITHM_ECDSA_HASH_SHA1;
		}
		else if (env->algorithm_flags & SC_ALGORITHM_ECDSA_HASH_SHA256)
		{
			sbuf[2] = 0x92;
			exdata->ecAlgFlags = SC_ALGORITHM_ECDSA_HASH_SHA256;
		}
		else if (env->algorithm_flags & SC_ALGORITHM_ECDSA_HASH_NONE)
		{
			sbuf[2] = 0x92;
			exdata->ecAlgFlags = SC_ALGORITHM_ECDSA_HASH_NONE;
		}
		else
		{
			sc_log(card->ctx, "%0x Alg Not Support! ", env->algorithm_flags);
			goto err;
		}
	}
	else if(env->algorithm == SC_ALGORITHM_RSA)
	{
		exdata->currAlg = SC_ALGORITHM_RSA; 
		apdu.p2 = 0xB8;
		sc_log(card->ctx, "setenv RSA Algorithm alg_flags = %0x\n",env->algorithm_flags);
	}
	else
	{
		sc_log(card->ctx, "%0x Alg Not Support! ", env->algorithm);
	}

	if (se_num > 0) {
		r = sc_lock(card);
		LOG_TEST_RET(card->ctx, r, "sc_lock() failed");
		locked = 1;
	}
	if (apdu.datalen != 0) {
		r = sc_transmit_apdu_t(card, &apdu);
		if (r) {
			sc_log(card->ctx, "%s: APDU transmit failed", sc_strerror(r));
			goto err;
		}

		r = sc_check_sw(card, apdu.sw1, apdu.sw2);
		if (r) {
			sc_log(card->ctx, "%s: Card returned error", sc_strerror(r));
			goto err;
		}
	}
	if (se_num <= 0)
		return 0;

	sc_format_apdu(card, &apdu, SC_APDU_CASE_3_SHORT, 0x22, 0xF2, se_num);
	r = sc_transmit_apdu_t(card, &apdu);
	sc_unlock(card);

	LOG_TEST_RET(card->ctx, r, "APDU transmit failed");
	return sc_check_sw(card, apdu.sw1, apdu.sw2);

err:
	if (locked)
		sc_unlock(card);
	return r;
}


static int
epass2003_restore_security_env(struct sc_card *card, int se_num)
{
	LOG_FUNC_CALLED(card->ctx);
	LOG_FUNC_RETURN(card->ctx, SC_SUCCESS);
}


static int epass2003_decipher(struct sc_card *card, const u8 * data, size_t datalen,
		u8 * out, size_t outlen)
{
	int r;
	struct sc_apdu apdu;
	u8 rbuf[SC_MAX_APDU_BUFFER_SIZE] = { 0 };
	u8 sbuf[SC_MAX_APDU_BUFFER_SIZE] = { 0 };
	epass2003_exdata *exdata = NULL;
	
	LOG_FUNC_CALLED(card->ctx);
	
	if (!card->drv_data)
		return SC_ERROR_INVALID_ARGUMENTS;
	
	exdata = (epass2003_exdata *)card->drv_data;

	if(exdata->currAlg == SC_ALGORITHM_EC)
	{
		if(exdata->ecAlgFlags & SC_ALGORITHM_ECDSA_HASH_SHA1)
		{
			r = hash_data(data, datalen, sbuf, SC_ALGORITHM_ECDSA_HASH_SHA1);
			LOG_TEST_RET(card->ctx, r, "hash_data failed"); 
			sc_format_apdu(card, &apdu, SC_APDU_CASE_3,0x2A, 0x9E, 0x9A);
			apdu.data = sbuf;
			apdu.lc = 0x14;
			apdu.datalen = 0x14;
		}
		else if (exdata->ecAlgFlags & SC_ALGORITHM_ECDSA_HASH_SHA256)
		{
			r = hash_data(data, datalen, sbuf, SC_ALGORITHM_ECDSA_HASH_SHA256);
			LOG_TEST_RET(card->ctx, r, "hash_data failed");
			sc_format_apdu(card, &apdu, SC_APDU_CASE_3,0x2A, 0x9E, 0x9A);
			apdu.data = sbuf;
			apdu.lc = 0x20;
			apdu.datalen = 0x20;
		}
		else if (exdata->ecAlgFlags & SC_ALGORITHM_ECDSA_HASH_NONE)
		{
			sc_format_apdu(card, &apdu, SC_APDU_CASE_3,0x2A, 0x9E, 0x9A);
			apdu.data = data;
			apdu.lc = 0x20;
			apdu.datalen = 0x20;
		}
		else
		{
			return SC_ERROR_NOT_SUPPORTED;
		}
		apdu.resp = rbuf;
		apdu.resplen = sizeof(rbuf);
		apdu.le = 0;

		r = sc_transmit_apdu_t(card, &apdu);
		LOG_TEST_RET(card->ctx, r, "APDU transmit failed");
		if (apdu.sw1 == 0x90 && apdu.sw2 == 0x00) {
			size_t len = apdu.resplen > outlen ? outlen : apdu.resplen;
			memcpy(out, apdu.resp, len);
			LOG_FUNC_RETURN(card->ctx, len);
		}
		LOG_FUNC_RETURN(card->ctx, sc_check_sw(card, apdu.sw1, apdu.sw2));
	}
	else if(exdata->currAlg == SC_ALGORITHM_RSA)
	{
		sc_format_apdu(card, &apdu, SC_APDU_CASE_4_EXT, 0x2A, 0x80, 0x86);
		apdu.resp = rbuf;
		apdu.resplen = sizeof(rbuf);
		apdu.le = 0;

		memcpy(sbuf, data, datalen);
		apdu.data = sbuf;
		apdu.lc = datalen;
		apdu.datalen = datalen;
	}
	else
	{
		sc_format_apdu(card, &apdu, SC_APDU_CASE_4_EXT, 0x2A, 0x80, 0x86);
		apdu.resp = rbuf;
		apdu.resplen = sizeof(rbuf);
		apdu.le = 256;

		memcpy(sbuf, data, datalen);
		apdu.data = sbuf;
		apdu.lc = datalen;
		apdu.datalen = datalen;
	}

	r = sc_transmit_apdu_t(card, &apdu);
	LOG_TEST_RET(card->ctx, r, "APDU transmit failed");

	if (apdu.sw1 == 0x90 && apdu.sw2 == 0x00) {
		size_t len = apdu.resplen > outlen ? outlen : apdu.resplen;
		memcpy(out, apdu.resp, len);
		LOG_FUNC_RETURN(card->ctx, len);
	}

	LOG_FUNC_RETURN(card->ctx, sc_check_sw(card, apdu.sw1, apdu.sw2));
}


static int
acl_to_ac_byte(struct sc_card *card, const struct sc_acl_entry *e)
{
	if (e == NULL)
		return SC_ERROR_OBJECT_NOT_FOUND;

	switch (e->method) {
	case SC_AC_NONE:
		LOG_FUNC_RETURN(card->ctx, EPASS2003_AC_MAC_NOLESS | EPASS2003_AC_EVERYONE);
	case SC_AC_NEVER:
		LOG_FUNC_RETURN(card->ctx, EPASS2003_AC_MAC_NOLESS | EPASS2003_AC_NOONE);
	default:
		LOG_FUNC_RETURN(card->ctx, EPASS2003_AC_MAC_NOLESS | EPASS2003_AC_USER);
	}

	LOG_FUNC_RETURN(card->ctx, SC_ERROR_INCORRECT_PARAMETERS);
}


static int
epass2003_process_fci(struct sc_card *card, sc_file_t * file, const u8 * buf, size_t buflen)
{
	sc_context_t *ctx = card->ctx;
	size_t taglen, len = buflen;
	const u8 *tag = NULL, *p = buf;

	sc_log(ctx, "processing FCI bytes");
	tag = sc_asn1_find_tag(ctx, p, len, 0x83, &taglen);
	if (tag != NULL && taglen == 2) {
		file->id = (tag[0] << 8) | tag[1];
		sc_log(ctx, "  file identifier: 0x%02X%02X", tag[0], tag[1]);
	}

	tag = sc_asn1_find_tag(ctx, p, len, 0x80, &taglen);
	if (tag != NULL && taglen > 0 && taglen < 3) {
		file->size = tag[0];
		if (taglen == 2)
			file->size = (file->size << 8) + tag[1];
		sc_log(ctx, "  bytes in file: %"SC_FORMAT_LEN_SIZE_T"u",
			   file->size);
	}

	if (tag == NULL) {
		tag = sc_asn1_find_tag(ctx, p, len, 0x81, &taglen);
		if (tag != NULL && taglen >= 2) {
			int bytes = (tag[0] << 8) + tag[1];

			sc_log(ctx, "  bytes in file: %d", bytes);
			file->size = bytes;
		}
	}

	tag = sc_asn1_find_tag(ctx, p, len, 0x82, &taglen);
	if (tag != NULL) {
		if (taglen > 0) {
			unsigned char byte = tag[0];
			const char *type;

			if (byte == 0x38) {
				type = "DF";
				file->type = SC_FILE_TYPE_DF;
			}
			else if (0x01 <= byte && byte <= 0x07) {
				type = "working EF";
				file->type = SC_FILE_TYPE_WORKING_EF;
				switch (byte) {
				case 0x01:
					file->ef_structure = SC_FILE_EF_TRANSPARENT;
					break;
				case 0x02:
					file->ef_structure = SC_FILE_EF_LINEAR_FIXED;
					break;
				case 0x04:
					file->ef_structure = SC_FILE_EF_LINEAR_FIXED;
					break;
				default:
					break;
				}

			}
			else if (0x10 == byte) {
				type = "BSO";
				file->type = SC_FILE_TYPE_BSO;
			}
			else if (0x11 <= byte) {
				type = "internal EF";
				file->type = SC_FILE_TYPE_INTERNAL_EF;
				switch (byte) {
				case 0x11:
					break;
				case 0x12:
					break;
				default:
					break;
				}
			}
			else {
				type = "unknown";
				file->type = SC_FILE_TYPE_INTERNAL_EF;

			}
			sc_log(ctx, "type %s, EF structure %d", type, byte);
		}
	}

	tag = sc_asn1_find_tag(ctx, p, len, 0x84, &taglen);
	if (tag != NULL && taglen > 0 && taglen <= 16) {
		memcpy(file->name, tag, taglen);
		file->namelen = taglen;

		sc_log_hex(ctx, "File name", file->name, file->namelen);
		if (!file->type)
			file->type = SC_FILE_TYPE_DF;
	}

	tag = sc_asn1_find_tag(ctx, p, len, 0x85, &taglen);
	if (tag != NULL && taglen)
		sc_file_set_prop_attr(file, tag, taglen);
	else
		file->prop_attr_len = 0;

	tag = sc_asn1_find_tag(ctx, p, len, 0xA5, &taglen);
	if (tag != NULL && taglen)
		sc_file_set_prop_attr(file, tag, taglen);

	tag = sc_asn1_find_tag(ctx, p, len, 0x86, &taglen);
	if (tag != NULL && taglen)
		sc_file_set_sec_attr(file, tag, taglen);

	tag = sc_asn1_find_tag(ctx, p, len, 0x8A, &taglen);
	if (tag != NULL && taglen == 1) {
		if (tag[0] == 0x01)
			file->status = SC_FILE_STATUS_CREATION;
		else if (tag[0] == 0x07 || tag[0] == 0x05)
			file->status = SC_FILE_STATUS_ACTIVATED;
		else if (tag[0] == 0x06 || tag[0] == 0x04)
			file->status = SC_FILE_STATUS_INVALIDATED;
	}
	file->magic = SC_FILE_MAGIC;

	return 0;
}


static int
epass2003_construct_fci(struct sc_card *card, const sc_file_t * file,
		u8 * out, size_t * outlen)
{
	u8 *p = out;
	u8 buf[64];
	unsigned char ops[8] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
	int rv;
	unsigned ii;

	if (*outlen < 2)
		return SC_ERROR_BUFFER_TOO_SMALL;

	*p++ = 0x62;
	p++;
	if (file->type == SC_FILE_TYPE_WORKING_EF) {
		if (file->ef_structure == SC_FILE_EF_TRANSPARENT) {
			buf[0] = (file->size >> 8) & 0xFF;
			buf[1] = file->size & 0xFF;
			sc_asn1_put_tag(0x80, buf, 2, p, *outlen - (p - out), &p);
		}
	}
	if (file->type == SC_FILE_TYPE_DF) {
		buf[0] = 0x38;
		buf[1] = 0x00;
		sc_asn1_put_tag(0x82, buf, 2, p, *outlen - (p - out), &p);
	}
	else if (file->type == SC_FILE_TYPE_WORKING_EF) {
		buf[0] = file->ef_structure & 7;
		if (file->ef_structure == SC_FILE_EF_TRANSPARENT) {
			buf[1] = 0x00;
			sc_asn1_put_tag(0x82, buf, 2, p, *outlen - (p - out), &p);
		}
		else if (file->ef_structure == SC_FILE_EF_LINEAR_FIXED
			   || file->ef_structure == SC_FILE_EF_LINEAR_VARIABLE) {
			buf[1] = 0x00;
			buf[2] = 0x00;
			buf[3] = 0x40;	/* record length */
			buf[4] = 0x00;	/* record count */
			sc_asn1_put_tag(0x82, buf, 5, p, *outlen - (p - out), &p);
		}
		else {
			return SC_ERROR_NOT_SUPPORTED;
		}

	}
	else if (file->type == SC_FILE_TYPE_INTERNAL_EF) {
		if (file->ef_structure == SC_CARDCTL_OBERTHUR_KEY_RSA_CRT ||
			file->ef_structure == SC_CARDCTL_OBERTHUR_KEY_EC_CRT) {
			buf[0] = 0x11;
			buf[1] = 0x00;
		}
		else if (file->ef_structure == SC_CARDCTL_OBERTHUR_KEY_RSA_PUBLIC ||
				file->ef_structure == SC_CARDCTL_OBERTHUR_KEY_EC_PUBLIC) {
			buf[0] = 0x12;
			buf[1] = 0x00;
		}
		else {
			return SC_ERROR_NOT_SUPPORTED;
		}
		sc_asn1_put_tag(0x82, buf, 2, p, *outlen - (p - out), &p);
	}
	else if (file->type == SC_FILE_TYPE_BSO) {
		buf[0] = 0x10;
		buf[1] = 0x00;
		sc_asn1_put_tag(0x82, buf, 2, p, *outlen - (p - out), &p);
	}

	buf[0] = (file->id >> 8) & 0xFF;
	buf[1] = file->id & 0xFF;
	sc_asn1_put_tag(0x83, buf, 2, p, *outlen - (p - out), &p);
	if (file->type == SC_FILE_TYPE_DF) {
		if (file->namelen != 0) {
			sc_asn1_put_tag(0x84, file->name, file->namelen, p, *outlen - (p - out), &p);
		}
		else {
			return SC_ERROR_INVALID_ARGUMENTS;
		}
	}
	if (file->type == SC_FILE_TYPE_DF) {
		unsigned char data[2] = {0x00, 0x7F};
		/* 127 files at most */
		sc_asn1_put_tag(0x85, data, sizeof(data), p, *outlen - (p - out), &p);
	}
	else if (file->type == SC_FILE_TYPE_BSO) {
		buf[0] = file->size & 0xff;
		sc_asn1_put_tag(0x85, buf, 1, p, *outlen - (p - out), &p);
	}
	else if (file->type == SC_FILE_TYPE_INTERNAL_EF) {
		if (file->ef_structure == SC_CARDCTL_OBERTHUR_KEY_RSA_CRT ||
			file->ef_structure == SC_CARDCTL_OBERTHUR_KEY_RSA_PUBLIC||
			file->ef_structure == SC_CARDCTL_OBERTHUR_KEY_EC_CRT||
			file->ef_structure == SC_CARDCTL_OBERTHUR_KEY_EC_PUBLIC) {
			buf[0] = (file->size >> 8) & 0xFF;
			buf[1] = file->size & 0xFF;
			sc_asn1_put_tag(0x85, buf, 2, p, *outlen - (p - out), &p);
		}
	}
	if (file->sec_attr_len) {
		memcpy(buf, file->sec_attr, file->sec_attr_len);
		sc_asn1_put_tag(0x86, buf, file->sec_attr_len, p, *outlen - (p - out), &p);
	}
	else {
		sc_log(card->ctx, "SC_FILE_ACL");
		if (file->type == SC_FILE_TYPE_DF) {
			ops[0] = SC_AC_OP_LIST_FILES;
			ops[1] = SC_AC_OP_CREATE;
			ops[3] = SC_AC_OP_DELETE;
		}
		else if (file->type == SC_FILE_TYPE_WORKING_EF) {
			if (file->ef_structure == SC_FILE_EF_TRANSPARENT) {
				ops[0] = SC_AC_OP_READ;
				ops[1] = SC_AC_OP_UPDATE;
				ops[3] = SC_AC_OP_DELETE;
			}
			else if (file->ef_structure == SC_FILE_EF_LINEAR_FIXED
					|| file->ef_structure == SC_FILE_EF_LINEAR_VARIABLE) {
				ops[0] = SC_AC_OP_READ;
				ops[1] = SC_AC_OP_UPDATE;
				ops[2] = SC_AC_OP_WRITE;
				ops[3] = SC_AC_OP_DELETE;
			}
			else {
				return SC_ERROR_NOT_SUPPORTED;
			}
		}
		else if (file->type == SC_FILE_TYPE_BSO) {
			ops[0] = SC_AC_OP_UPDATE;
			ops[3] = SC_AC_OP_DELETE;
		}
		else if (file->type == SC_FILE_TYPE_INTERNAL_EF) {
			if (file->ef_structure == SC_CARDCTL_OBERTHUR_KEY_RSA_CRT ||
				file->ef_structure == SC_CARDCTL_OBERTHUR_KEY_EC_CRT) {
				ops[1] = SC_AC_OP_UPDATE;
				ops[2] = SC_AC_OP_CRYPTO;
				ops[3] = SC_AC_OP_DELETE;
			}
			else if (file->ef_structure == SC_CARDCTL_OBERTHUR_KEY_RSA_PUBLIC||
					file->ef_structure == SC_CARDCTL_OBERTHUR_KEY_EC_PUBLIC) {
				ops[0] = SC_AC_OP_READ;
				ops[1] = SC_AC_OP_UPDATE;
				ops[2] = SC_AC_OP_CRYPTO;
				ops[3] = SC_AC_OP_DELETE;
			}
		}
		else {
			return SC_ERROR_NOT_SUPPORTED;
		}

		for (ii = 0; ii < sizeof(ops); ii++) {
			const struct sc_acl_entry *entry;

			buf[ii] = 0xFF;
			if (ops[ii] == 0xFF)
				continue;
			entry = sc_file_get_acl_entry(file, ops[ii]);

			rv = acl_to_ac_byte(card, entry);
			LOG_TEST_RET(card->ctx, rv, "Invalid ACL");

			buf[ii] = rv;
		}
		sc_asn1_put_tag(0x86, buf, sizeof(ops), p, *outlen - (p - out), &p);
		if(file->size == 256)	
		{
			out[4]= 0x13;
		}

	}

	/* VT ??? */
	if (file->ef_structure == SC_CARDCTL_OBERTHUR_KEY_RSA_PUBLIC||
		file->ef_structure == SC_CARDCTL_OBERTHUR_KEY_EC_PUBLIC) {
		unsigned char data[2] = {0x00, 0x66};
		sc_asn1_put_tag(0x87, data, sizeof(data), p, *outlen - (p - out), &p);
		if(file->size == 256)	
		{
			out[4]= 0x14;
		}
	}

	out[1] = p - out - 2;

	*outlen = p - out;
	return 0;
}


static int
epass2003_create_file(struct sc_card *card, sc_file_t * file)
{
	int r;
	size_t len;
	u8 sbuf[SC_MAX_APDU_BUFFER_SIZE] = { 0 };
	struct sc_apdu apdu;

	len = SC_MAX_APDU_BUFFER_SIZE;

	epass2003_hook_file(file, 1);

	if (card->ops->construct_fci == NULL)
		LOG_FUNC_RETURN(card->ctx, SC_ERROR_NOT_SUPPORTED);

	r = epass2003_construct_fci(card, file, sbuf, &len);
	LOG_TEST_RET(card->ctx, r, "construct_fci() failed");

	sc_format_apdu(card, &apdu, SC_APDU_CASE_3_SHORT, 0xE0, 0x00, 0x00);
	apdu.lc = len;
	apdu.datalen = len;
	apdu.data = sbuf;

	r = sc_transmit_apdu_t(card, &apdu);
	LOG_TEST_RET(card->ctx, r, "APDU transmit failed");
	r = sc_check_sw(card, apdu.sw1, apdu.sw2);
	LOG_TEST_RET(card->ctx, r, "APDU sw1/2 wrong");

	epass2003_hook_file(file, 0);
	return r;
}


static int
epass2003_delete_file(struct sc_card *card, const sc_path_t * path)
{
	int r;
	u8 sbuf[2];
	struct sc_apdu apdu;

	LOG_FUNC_CALLED(card->ctx);

	r = sc_select_file(card, path, NULL);
	epass2003_hook_path((struct sc_path *)path, 1);
	if (r == SC_SUCCESS) {
		sbuf[0] = path->value[path->len - 2];
		sbuf[1] = path->value[path->len - 1];
		sc_format_apdu(card, &apdu, SC_APDU_CASE_3_SHORT, 0xE4, 0x00, 0x00);
		apdu.lc = 2;
		apdu.datalen = 2;
		apdu.data = sbuf;
	}
	else   {
		LOG_FUNC_RETURN(card->ctx, SC_ERROR_INVALID_ARGUMENTS);
	}

	r = sc_transmit_apdu_t(card, &apdu);
	LOG_TEST_RET(card->ctx, r, "APDU transmit failed");
	r = sc_check_sw(card, apdu.sw1, apdu.sw2);
	LOG_TEST_RET(card->ctx, r, "Delete file failed");

	LOG_FUNC_RETURN(card->ctx, r);
}

static int
epass2003_list_files(struct sc_card *card, unsigned char *buf, size_t buflen)
{
	struct sc_apdu apdu;
	unsigned char rbuf[SC_MAX_APDU_BUFFER_SIZE] = { 0 };
	int r;

	SC_FUNC_CALLED(card->ctx, SC_LOG_DEBUG_VERBOSE);
	sc_format_apdu(card, &apdu, SC_APDU_CASE_1, 0x34, 0x00, 0x00);
	apdu.cla = 0x80;
	apdu.le = 0;
	apdu.resplen = sizeof(rbuf);
	apdu.resp = rbuf;

	r = sc_transmit_apdu_t(card, &apdu);
	LOG_TEST_RET(card->ctx, r, "APDU transmit failed");

	r = sc_check_sw(card, apdu.sw1, apdu.sw2);
	LOG_TEST_RET(card->ctx, r, "Card returned error");

	if (apdu.resplen == 0x100 && rbuf[0] == 0 && rbuf[1] == 0)
		LOG_FUNC_RETURN(card->ctx, 0);

	buflen = buflen < apdu.resplen ? buflen : apdu.resplen;
	memcpy(buf, rbuf, buflen);

	LOG_FUNC_RETURN(card->ctx, buflen);
}


static int
internal_write_rsa_key_factor(struct sc_card *card, unsigned short fid, u8 factor,
		sc_pkcs15_bignum_t data)
{
	int r;
	struct sc_apdu apdu;
	u8 sbuff[SC_MAX_EXT_APDU_BUFFER_SIZE] = { 0 };

	LOG_FUNC_CALLED(card->ctx);

	sbuff[0] = ((fid & 0xff00) >> 8);
	sbuff[1] = (fid & 0x00ff);
	memcpy(&sbuff[2], data.data, data.len);
//	sc_mem_reverse(&sbuff[2], data.len);

	sc_format_apdu(card, &apdu, SC_APDU_CASE_3, 0xe7, factor, 0x00);
	apdu.cla = 0x80;
	apdu.lc = apdu.datalen = 2 + data.len;
	apdu.data = sbuff;

	r = sc_transmit_apdu_t(card, &apdu);
	LOG_TEST_RET(card->ctx, r, "APDU transmit failed");
	r = sc_check_sw(card, apdu.sw1, apdu.sw2);
	LOG_TEST_RET(card->ctx, r, "Write rsa key factor failed");

	LOG_FUNC_RETURN(card->ctx, SC_SUCCESS);
}


static int
internal_write_rsa_key(struct sc_card *card, unsigned short fid, struct sc_pkcs15_prkey_rsa *rsa)
{
	int r;

	LOG_FUNC_CALLED(card->ctx);

	r = internal_write_rsa_key_factor(card, fid, 0x02, rsa->modulus);
	LOG_TEST_RET(card->ctx, r, "write n failed");
	r = internal_write_rsa_key_factor(card, fid, 0x03, rsa->d);
	LOG_TEST_RET(card->ctx, r, "write d failed");

	LOG_FUNC_RETURN(card->ctx, SC_SUCCESS);
}


static int
hash_data(const unsigned char *data, size_t datalen, unsigned char *hash, unsigned int mechanismType)
{

	if ((NULL == data) || (NULL == hash))
		return SC_ERROR_INVALID_ARGUMENTS;

	if(mechanismType & SC_ALGORITHM_ECDSA_HASH_SHA1)
	{
		unsigned char data_hash[24] = { 0 };
		size_t len = 0;

		sha1_digest(data, datalen, data_hash);
		len = REVERSE_ORDER4(datalen);
		memcpy(&data_hash[20], &len, 4);
		memcpy(hash, data_hash, 24);
	}
	else if(mechanismType & SC_ALGORITHM_ECDSA_HASH_SHA256)
	{
		unsigned char data_hash[36] = { 0 };
		size_t len = 0;

		sha256_digest(data, datalen, data_hash);
		len = REVERSE_ORDER4(datalen);
		memcpy(&data_hash[32], &len, 4);
		memcpy(hash, data_hash, 36);
	}
	else
	{
		return SC_ERROR_NOT_SUPPORTED;
	}

	return SC_SUCCESS;
}


static int
install_secret_key(struct sc_card *card, unsigned char ktype, unsigned char kid,
		unsigned char useac, unsigned char modifyac, unsigned char EC,
		unsigned char *data, unsigned long dataLen)
{
	int r;
	struct sc_apdu apdu;
	unsigned char isapp = 0x00;	/* appendable */
	unsigned char tmp_data[256] = { 0 };

	tmp_data[0] = ktype;
	tmp_data[1] = kid;
	tmp_data[2] = useac;
	tmp_data[3] = modifyac;
	tmp_data[8] = 0xFF;

	if (0x04 == ktype || 0x06 == ktype) {
		tmp_data[4] = EPASS2003_AC_MAC_NOLESS | EPASS2003_AC_SO;
		tmp_data[5] = EPASS2003_AC_MAC_NOLESS | EPASS2003_AC_SO;
		tmp_data[7] = (kid == PIN_ID[0] ? EPASS2003_AC_USER : EPASS2003_AC_SO);
		tmp_data[9] = (EC << 4) | EC;
	}

	memcpy(&tmp_data[10], data, dataLen);
	sc_format_apdu(card, &apdu, SC_APDU_CASE_3_SHORT, 0xe3, isapp, 0x00);
	apdu.cla = 0x80;
	apdu.lc = apdu.datalen = 10 + dataLen;
	apdu.data = tmp_data;

	r = sc_transmit_apdu_t(card, &apdu);
	LOG_TEST_RET(card->ctx, r, "APDU install_secret_key failed");
	r = sc_check_sw(card, apdu.sw1, apdu.sw2);
	LOG_TEST_RET(card->ctx, r, "install_secret_key failed");

	return r;
}


static int
internal_install_pre(struct sc_card *card)
{
	int r;
	/* init key for enc */
	r = install_secret_key(card, 0x01, 0x00,
			       EPASS2003_AC_MAC_NOLESS | EPASS2003_AC_EVERYONE,
			       EPASS2003_AC_MAC_NOLESS | EPASS2003_AC_EVERYONE,
			       0, g_init_key_enc, 16);
	LOG_TEST_RET(card->ctx, r, "Install init key failed");

	/* init key for mac */
	r = install_secret_key(card, 0x02, 0x00,
			       EPASS2003_AC_MAC_NOLESS | EPASS2003_AC_EVERYONE,
			       EPASS2003_AC_MAC_NOLESS | EPASS2003_AC_EVERYONE,
			       0, g_init_key_mac, 16);
	LOG_TEST_RET(card->ctx, r, "Install init key failed");

	return r;
}


/* use external auth secret as pin */
static int
internal_install_pin(struct sc_card *card, sc_epass2003_wkey_data * pin)
{
	int r;
	unsigned char hash[HASH_LEN] = { 0 };

	r = hash_data(pin->key_data.es_secret.key_val, pin->key_data.es_secret.key_len, hash, SC_ALGORITHM_ECDSA_HASH_SHA1);
	LOG_TEST_RET(card->ctx, r, "hash data failed");

	r = install_secret_key(card, 0x04, pin->key_data.es_secret.kid,
			       pin->key_data.es_secret.ac[0],
			       pin->key_data.es_secret.ac[1],
			       pin->key_data.es_secret.EC, hash, HASH_LEN);
	LOG_TEST_RET(card->ctx, r, "Install failed");

	return r;
}


static int
epass2003_write_key(struct sc_card *card, sc_epass2003_wkey_data * data)
{
	LOG_FUNC_CALLED(card->ctx);

	if (data->type & SC_EPASS2003_KEY) {
		if (data->type == SC_EPASS2003_KEY_RSA)
			return internal_write_rsa_key(card, data->key_data.es_key.fid,
						      data->key_data.es_key.rsa);
		else
			LOG_FUNC_RETURN(card->ctx, SC_ERROR_NOT_SUPPORTED);
	} else if (data->type & SC_EPASS2003_SECRET) {
		if (data->type == SC_EPASS2003_SECRET_PRE)
			return internal_install_pre(card);
		else if (data->type == SC_EPASS2003_SECRET_PIN)
			return internal_install_pin(card, data);
		else
			LOG_FUNC_RETURN(card->ctx, SC_ERROR_NOT_SUPPORTED);
	}
	else {
		LOG_FUNC_RETURN(card->ctx, SC_ERROR_NOT_SUPPORTED);
	}

	LOG_FUNC_RETURN(card->ctx, SC_SUCCESS);
}


static int
epass2003_gen_key(struct sc_card *card, sc_epass2003_gen_key_data * data)
{
	int r;
	size_t len = data->key_length;
	struct sc_apdu apdu;
	u8 rbuf[SC_MAX_EXT_APDU_BUFFER_SIZE] = { 0 };
	u8 sbuf[SC_MAX_EXT_APDU_BUFFER_SIZE] = { 0 };

	LOG_FUNC_CALLED(card->ctx);

	if(len == 256)
	{
		sbuf[0] = 0x02;
	}
	else
	{
		sbuf[0] = 0x01;
	}
	sbuf[1] = (u8) ((len >> 8) & 0xff);
	sbuf[2] = (u8) (len & 0xff);
	sbuf[3] = (u8) ((data->prkey_id >> 8) & 0xFF);
	sbuf[4] = (u8) ((data->prkey_id) & 0xFF);
	sbuf[5] = (u8) ((data->pukey_id >> 8) & 0xFF);
	sbuf[6] = (u8) ((data->pukey_id) & 0xFF);

	/* generate key */
	sc_format_apdu(card, &apdu, SC_APDU_CASE_3_SHORT, 0x46, 0x00, 0x00);
	apdu.lc = apdu.datalen = 7;
	apdu.data = sbuf;

	r = sc_transmit_apdu_t(card, &apdu);
	LOG_TEST_RET(card->ctx, r, "APDU transmit failed");
	r = sc_check_sw(card, apdu.sw1, apdu.sw2);
	LOG_TEST_RET(card->ctx, r, "generate key pair failed");

	/* read public key */
	sc_format_apdu(card, &apdu, SC_APDU_CASE_3_SHORT, 0xb4, 0x02, 0x00);
	if(len == 256)
	{
		apdu.p1 = 0x00;
	}

	apdu.cla = 0x80;
	apdu.lc = apdu.datalen = 2;
	apdu.data = &sbuf[5];
	apdu.resp = rbuf;
	apdu.resplen = sizeof(rbuf);
	apdu.le = 0x00;

	r = sc_transmit_apdu_t(card, &apdu);
	LOG_TEST_RET(card->ctx, r, "APDU transmit failed");
	r = sc_check_sw(card, apdu.sw1, apdu.sw2);
	LOG_TEST_RET(card->ctx, r, "get pukey failed");

	if (len < apdu.resplen)
		LOG_FUNC_RETURN(card->ctx, SC_ERROR_INVALID_ARGUMENTS);

	if(256 == len)
	{
		int xCoordinateLen = rbuf[1];
		int yCoordinateLen = rbuf[2+xCoordinateLen+1];
		unsigned char * tmp =(u8 *)malloc(xCoordinateLen + yCoordinateLen);
		if(!tmp)
		{
			LOG_FUNC_RETURN(card->ctx, SC_ERROR_OUT_OF_MEMORY);
		}

		if(0x58 == rbuf[0])
		{
			memcpy(tmp, &rbuf[2], xCoordinateLen);
		}
		else{
			free(tmp);
			LOG_FUNC_RETURN(card->ctx, SC_ERROR_OBJECT_NOT_VALID);
		}
		if(0x59 == rbuf[2+xCoordinateLen])
		{
			memcpy(tmp + xCoordinateLen, &rbuf[2+xCoordinateLen+2], yCoordinateLen);
		}
		else{
			free(tmp);
			LOG_FUNC_RETURN(card->ctx, SC_ERROR_OBJECT_NOT_VALID);
		}

		data->modulus = (u8 *) malloc(xCoordinateLen + yCoordinateLen);
		if (!data->modulus)
		{
			free(tmp);
			LOG_FUNC_RETURN(card->ctx, SC_ERROR_OUT_OF_MEMORY);
		}
		else
		{
			memcpy(data->modulus, tmp, xCoordinateLen+yCoordinateLen);
			free(tmp);
		}
	}
	else
	{
		data->modulus = (u8 *) malloc(len);
		if (!data->modulus)
		{
			LOG_FUNC_RETURN(card->ctx, SC_ERROR_OUT_OF_MEMORY);
		}
		else
		{	
			memcpy(data->modulus, rbuf, len);
		}
	}
	LOG_FUNC_RETURN(card->ctx, SC_SUCCESS);
}


static int
epass2003_erase_card(struct sc_card *card)
{
	static const unsigned char install_magic_pin[26] = {
		/* compare install_secret_key */
		0x06,0x01,0x10,0x16, 0x16,0x16,0x00,0x0f, 0xff,0x66,
		0x31,0x32,0x33,0x34, 0x35,0x36,0x37,0x38,
		0x31,0x32,0x33,0x34, 0x35,0x36,0x37,0x38,
	};
	static const unsigned char magic_pin[16] = "1234567812345678";
	static const unsigned char mf_path[2] = { 0x3f, 0x00 };
	sc_apdu_t apdu;
	int r;

	LOG_FUNC_CALLED(card->ctx);
	sc_invalidate_cache(card);

	/* install magic pin */
	sc_format_apdu(card, &apdu, 0x03, 0xe3, 0x00, 0x00);
	apdu.cla = 0x80;
	apdu.data = install_magic_pin;
	apdu.datalen = apdu.lc = sizeof(install_magic_pin);
	r = sc_transmit_apdu(card, &apdu);
	LOG_TEST_RET(card->ctx, r, "APDU install magic pin failed");
	r = sc_check_sw(card, apdu.sw1, apdu.sw2);
	LOG_TEST_RET(card->ctx, r, "install magic pin failed");

	/* verify magic pin */
	sc_format_apdu(card, &apdu, 0x03, 0x20, 0x00, 0x01);
	apdu.cla = 0;
	apdu.data = magic_pin;
	apdu.datalen = apdu.lc = sizeof(magic_pin);
	r = sc_transmit_apdu(card, &apdu);
	LOG_TEST_RET(card->ctx, r, "APDU verify magic pin failed");
	r = sc_check_sw(card, apdu.sw1, apdu.sw2);
	LOG_TEST_RET(card->ctx, r, "verify magic pin failed");

	/* delete MF */
	sc_format_apdu(card, &apdu, 0x03, 0xe4, 0x00, 0x00);
	apdu.cla = 0;
	apdu.data = mf_path;
	apdu.datalen = apdu.lc = sizeof(mf_path);
	r = sc_transmit_apdu(card, &apdu);
	LOG_TEST_RET(card->ctx, r, "APDU delete MF failed");
	r = sc_check_sw(card, apdu.sw1, apdu.sw2);
	LOG_TEST_RET(card->ctx, r, "delete MF failed");

	LOG_FUNC_RETURN(card->ctx, r);
}


static int
epass2003_get_serialnr(struct sc_card *card, sc_serial_number_t * serial)
{
	u8 rbuf[8];
	size_t rbuf_len = sizeof(rbuf);

	LOG_FUNC_CALLED(card->ctx);

	if (SC_SUCCESS != get_data(card, 0x80, rbuf, rbuf_len))
		return SC_ERROR_CARD_CMD_FAILED;

	card->serialnr.len = serial->len = 8;
	memcpy(card->serialnr.value, rbuf, 8);
	memcpy(serial->value, rbuf, 8);

	LOG_FUNC_RETURN(card->ctx, SC_SUCCESS);
}


static int
epass2003_card_ctl(struct sc_card *card, unsigned long cmd, void *ptr)
{
	LOG_FUNC_CALLED(card->ctx);

	sc_log(card->ctx, "cmd is %0lx", cmd);
	switch (cmd) {
	case SC_CARDCTL_ENTERSAFE_WRITE_KEY:
		return epass2003_write_key(card, (sc_epass2003_wkey_data *) ptr);
	case SC_CARDCTL_ENTERSAFE_GENERATE_KEY:
		return epass2003_gen_key(card, (sc_epass2003_gen_key_data *) ptr);
	case SC_CARDCTL_ERASE_CARD:
		return epass2003_erase_card(card);
	case SC_CARDCTL_GET_SERIALNR:
		return epass2003_get_serialnr(card, (sc_serial_number_t *) ptr);
	default:
		return SC_ERROR_NOT_SUPPORTED;
	}
}


static void
internal_sanitize_pin_info(struct sc_pin_cmd_pin *pin, unsigned int num)
{
	pin->encoding = SC_PIN_ENCODING_ASCII;
	pin->min_length = 4;
	pin->max_length = 16;
	pin->pad_length = 16;
	pin->offset = 5 + num * 16;
	pin->pad_char = 0x00;
}


static int
get_external_key_maxtries(struct sc_card *card, unsigned char *maxtries)
{
	unsigned char maxcounter[2] = { 0 };
	static const sc_path_t file_path = {
		{0x3f, 0x00, 0x50, 0x15, 0x9f, 0x00, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}, 6,
		0,
		0,
		SC_PATH_TYPE_PATH,
		{{0}, 0}
	};
	int ret;

	ret = sc_select_file(card, &file_path, NULL);
	LOG_TEST_RET(card->ctx, ret, "select max counter file failed");

	ret = sc_read_binary(card, 0, maxcounter, 2, 0);
	LOG_TEST_RET(card->ctx, ret, "read max counter file failed");

	*maxtries = maxcounter[0];
	return SC_SUCCESS;
}


static int
get_external_key_retries(struct sc_card *card, unsigned char kid, unsigned char *retries)
{
	int r;
	struct sc_apdu apdu;
	unsigned char random[16] = { 0 };

	r = sc_get_challenge(card, random, 8);
	LOG_TEST_RET(card->ctx, r, "get challenge get_external_key_retries failed");

	sc_format_apdu(card, &apdu, SC_APDU_CASE_1, 0x82, 0x01, 0x80 | kid);
	apdu.resp = NULL;
	apdu.resplen = 0;

	r = sc_transmit_apdu_t(card, &apdu);
	LOG_TEST_RET(card->ctx, r, "APDU get_external_key_retries failed");

	if (retries && ((0x63 == (apdu.sw1 & 0xff)) && (0xC0 == (apdu.sw2 & 0xf0)))) {
		*retries = (apdu.sw2 & 0x0f);
		r = SC_SUCCESS;
	}
	else {
		LOG_TEST_RET(card->ctx, r, "get_external_key_retries failed");
		r = SC_ERROR_CARD_CMD_FAILED;
	}

	return r;
}

static int 
epass2003_get_challenge(sc_card_t *card, u8 *rnd, size_t len)
{
	u8 rbuf[16];
	size_t out_len;
	int r;

	LOG_FUNC_CALLED(card->ctx);

	r = iso_ops->get_challenge(card, rbuf, sizeof rbuf);
	LOG_TEST_RET(card->ctx, r, "GET CHALLENGE cmd failed");

	if (len < (size_t) r) {
		out_len = len;
	} else {
		out_len = (size_t) r;
	}
	memcpy(rnd, rbuf, out_len);

	LOG_FUNC_RETURN(card->ctx, (int) out_len);
}


static int
external_key_auth(struct sc_card *card, unsigned char kid,
		unsigned char *data, size_t datalen)
{
	int r;
	struct sc_apdu apdu;
	unsigned char random[16] = { 0 };
	unsigned char tmp_data[16] = { 0 };
	unsigned char hash[HASH_LEN] = { 0 };
	unsigned char iv[16] = { 0 };

	r = sc_get_challenge(card, random, 8);
	LOG_TEST_RET(card->ctx, r, "get challenge external_key_auth failed");

	r = hash_data(data, datalen, hash, SC_ALGORITHM_ECDSA_HASH_SHA1);
	LOG_TEST_RET(card->ctx, r, "hash data failed");

	des3_encrypt_cbc(hash, HASH_LEN, iv, random, 8, tmp_data);
	sc_format_apdu(card, &apdu, SC_APDU_CASE_3_SHORT, 0x82, 0x01, 0x80 | kid);
	apdu.lc = apdu.datalen = 8;
	apdu.data = tmp_data;

	r = sc_transmit_apdu_t(card, &apdu);
	LOG_TEST_RET(card->ctx, r, "APDU external_key_auth failed");
	r = sc_check_sw(card, apdu.sw1, apdu.sw2);
	LOG_TEST_RET(card->ctx, r, "external_key_auth failed");

	return r;
}


static int
update_secret_key(struct sc_card *card, unsigned char ktype, unsigned char kid,
		const unsigned char *data, unsigned long datalen)
{
	int r;
	struct sc_apdu apdu;
	unsigned char hash[HASH_LEN] = { 0 };
	unsigned char tmp_data[256] = { 0 };
	unsigned char maxtries = 0;

	r = hash_data(data, datalen, hash, SC_ALGORITHM_ECDSA_HASH_SHA1);
	LOG_TEST_RET(card->ctx, r, "hash data failed");

	r = get_external_key_maxtries(card, &maxtries);
	LOG_TEST_RET(card->ctx, r, "get max counter failed");

	tmp_data[0] = (maxtries << 4) | maxtries;
	memcpy(&tmp_data[1], hash, HASH_LEN);
	sc_format_apdu(card, &apdu, SC_APDU_CASE_3_SHORT, 0xe5, ktype, kid);
	apdu.cla = 0x80;
	apdu.lc = apdu.datalen = 1 + HASH_LEN;
	apdu.data = tmp_data;

	r = sc_transmit_apdu_t(card, &apdu);
	LOG_TEST_RET(card->ctx, r, "APDU update_secret_key failed");
	r = sc_check_sw(card, apdu.sw1, apdu.sw2);
	LOG_TEST_RET(card->ctx, r, "update_secret_key failed");

	return r;
}

/* use external auth secret as pin */
static int
epass2003_pin_cmd(struct sc_card *card, struct sc_pin_cmd_data *data, int *tries_left)
{
	int r;
	u8 kid;
	u8 retries = 0;
	u8 pin_low = 3;
	unsigned char maxtries = 0;

	LOG_FUNC_CALLED(card->ctx);

	internal_sanitize_pin_info(&data->pin1, 0);
	internal_sanitize_pin_info(&data->pin2, 1);
	data->flags |= SC_PIN_CMD_NEED_PADDING;
	kid = data->pin_reference;

	if(NULL == (unsigned char *)data->pin1.data || 0 == data->pin1.len)
		LOG_FUNC_RETURN(card->ctx, SC_ERROR_PIN_CODE_INCORRECT);

	/* get pin retries */
	if (data->cmd == SC_PIN_CMD_GET_INFO) {

		r = get_external_key_retries(card, 0x80 | kid, &retries);
		if (r == SC_SUCCESS) {
			data->pin1.tries_left = retries;
			if (tries_left)
				*tries_left = retries;

			r = get_external_key_maxtries(card, &maxtries);
			LOG_TEST_RET(card->ctx, r, "get max counter failed");

			data->pin1.max_tries = maxtries;
		}
		LOG_TEST_RET(card->ctx, r, "verify pin failed");
	}
	else if (data->cmd == SC_PIN_CMD_UNBLOCK) { /* verify */
		r = external_key_auth(card, (kid + 1), (unsigned char *)data->pin1.data,
				data->pin1.len);
		LOG_TEST_RET(card->ctx, r, "verify pin failed");
	}
	else if (data->cmd == SC_PIN_CMD_CHANGE || data->cmd == SC_PIN_CMD_UNBLOCK) { /* change */
		r = update_secret_key(card, 0x04, kid, data->pin2.data,
				(unsigned long)data->pin2.len);
		LOG_TEST_RET(card->ctx, r, "verify pin failed");
	}
	else {
		r = external_key_auth(card, kid, (unsigned char *)data->pin1.data,
				data->pin1.len);
		LOG_TEST_RET(card->ctx, r, "verify pin failed");

		r = get_external_key_retries(card, 0x80 | kid, &retries);
		if (retries < pin_low)
			sc_log(card->ctx, "Verification failed (remaining tries: %d)", retries);

		LOG_TEST_RET(card->ctx, r, "verify pin failed");
	}

	if (r == SC_SUCCESS)
	{
		data->pin1.logged_in = SC_PIN_STATE_LOGGED_IN;
	}
	return r;
}

static struct sc_card_driver *sc_get_driver(void)
{
	struct sc_card_driver *iso_drv = sc_get_iso7816_driver();

	if (iso_ops == NULL)
		iso_ops = iso_drv->ops;

	epass2003_ops = *iso_ops;

	epass2003_ops.match_card = epass2003_match_card;
	epass2003_ops.init = epass2003_init;
	epass2003_ops.finish = epass2003_finish;
	epass2003_ops.write_binary = NULL;
	epass2003_ops.write_record = NULL;
	epass2003_ops.select_file = epass2003_select_file;
	epass2003_ops.get_response = NULL;
	epass2003_ops.restore_security_env = epass2003_restore_security_env;
	epass2003_ops.set_security_env = epass2003_set_security_env;
	epass2003_ops.decipher = epass2003_decipher;
	epass2003_ops.compute_signature = epass2003_decipher;
	epass2003_ops.create_file = epass2003_create_file;
	epass2003_ops.delete_file = epass2003_delete_file;
	epass2003_ops.list_files = epass2003_list_files;
	epass2003_ops.card_ctl = epass2003_card_ctl;
	epass2003_ops.process_fci = epass2003_process_fci;
	epass2003_ops.construct_fci = epass2003_construct_fci;
	epass2003_ops.pin_cmd = epass2003_pin_cmd;
	epass2003_ops.check_sw = epass2003_check_sw;
	epass2003_ops.get_challenge = epass2003_get_challenge;
	return &epass2003_drv;
}

struct sc_card_driver *sc_get_epass2003_driver(void)
{
	return sc_get_driver();
}
#endif	/* #ifdef ENABLE_OPENSSL */
#endif	/* #ifdef ENABLE_SM */
