/*
 * This module implements the standard set of CHV commands
 * for GSM 11.11 SIMs.
 */

#include <sys/types.h>
#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <pcsclite.h>
#include <winscard.h>
#include "globals.h"

static
encode_pin_entry(arg, dest)
	char *arg;
	u_char *dest;
{
	unsigned n;

	n = 0;
	while (*arg) {
		if (!isdigit(*arg)) {
			fprintf(stderr,
			"error: PIN argument contains a non-digit character\n");
			return(-1);
		}
		if (n >= 8) {
			fprintf(stderr, "error: PIN argument is too long\n");
			return(-1);
		}
		*dest++ = *arg++;
		n++;
	}
	for (; n < 8; n++)
		*dest++ = 0xFF;
	return(0);
}

cmd_verify_chv(argc, argv)
	char **argv;
{
	u_char cmd[13];
	int rc;

	/* VERIFY CHV command APDU */
	cmd[0] = 0xA0;
	cmd[1] = 0x20;
	cmd[2] = 0x00;
	switch (argv[0][10]) {
	case '1':
		cmd[3] = 0x01;
		break;
	case '2':
		cmd[3] = 0x02;
		break;
	default:
		fprintf(stderr, "BUG in verify-chvN command\n");
		return(-1);
	}
	cmd[4] = 8;
	rc = encode_pin_entry(argv[1], cmd + 5);
	if (rc < 0)
		return(rc);
	rc = apdu_exchange(cmd, 13);
	if (rc < 0)
		return(rc);
	if (sim_resp_sw != 0x9000) {
		fprintf(stderr, "bad SW response: %04X\n", sim_resp_sw);
		return(-1);
	}
	return(0);
}

cmd_change_chv(argc, argv)
	char **argv;
{
	u_char cmd[21];
	int rc;

	/* CHANGE CHV command APDU */
	cmd[0] = 0xA0;
	cmd[1] = 0x24;
	cmd[2] = 0x00;
	switch (argv[0][10]) {
	case '1':
		cmd[3] = 0x01;
		break;
	case '2':
		cmd[3] = 0x02;
		break;
	default:
		fprintf(stderr, "BUG in change-chvN command\n");
		return(-1);
	}
	cmd[4] = 16;
	rc = encode_pin_entry(argv[1], cmd + 5);
	if (rc < 0)
		return(rc);
	rc = encode_pin_entry(argv[2], cmd + 13);
	if (rc < 0)
		return(rc);
	rc = apdu_exchange(cmd, 21);
	if (rc < 0)
		return(rc);
	if (sim_resp_sw != 0x9000) {
		fprintf(stderr, "bad SW response: %04X\n", sim_resp_sw);
		return(-1);
	}
	return(0);
}

cmd_disable_chv(argc, argv)
	char **argv;
{
	u_char cmd[13];
	int rc;

	/* DISABLE CHV command APDU */
	cmd[0] = 0xA0;
	cmd[1] = 0x26;
	cmd[2] = 0x00;
	cmd[3] = 0x01;
	cmd[4] = 8;
	rc = encode_pin_entry(argv[1], cmd + 5);
	if (rc < 0)
		return(rc);
	rc = apdu_exchange(cmd, 13);
	if (rc < 0)
		return(rc);
	if (sim_resp_sw != 0x9000) {
		fprintf(stderr, "bad SW response: %04X\n", sim_resp_sw);
		return(-1);
	}
	return(0);
}

cmd_enable_chv(argc, argv)
	char **argv;
{
	u_char cmd[13];
	int rc;

	/* ENABLE CHV command APDU */
	cmd[0] = 0xA0;
	cmd[1] = 0x28;
	cmd[2] = 0x00;
	cmd[3] = 0x01;
	cmd[4] = 8;
	rc = encode_pin_entry(argv[1], cmd + 5);
	if (rc < 0)
		return(rc);
	rc = apdu_exchange(cmd, 13);
	if (rc < 0)
		return(rc);
	if (sim_resp_sw != 0x9000) {
		fprintf(stderr, "bad SW response: %04X\n", sim_resp_sw);
		return(-1);
	}
	return(0);
}

cmd_unblock_chv(argc, argv)
	char **argv;
{
	u_char cmd[21];
	int rc;

	/* UNBLOCK CHV command APDU */
	cmd[0] = 0xA0;
	cmd[1] = 0x2C;
	cmd[2] = 0x00;
	switch (argv[0][11]) {
	case '1':
		cmd[3] = 0x00;
		break;
	case '2':
		cmd[3] = 0x02;
		break;
	default:
		fprintf(stderr, "BUG in unblock-chvN command\n");
		return(-1);
	}
	cmd[4] = 16;
	rc = encode_pin_entry(argv[1], cmd + 5);
	if (rc < 0)
		return(rc);
	rc = encode_pin_entry(argv[2], cmd + 13);
	if (rc < 0)
		return(rc);
	rc = apdu_exchange(cmd, 21);
	if (rc < 0)
		return(rc);
	if (sim_resp_sw != 0x9000) {
		fprintf(stderr, "bad SW response: %04X\n", sim_resp_sw);
		return(-1);
	}
	return(0);
}