/*-
 * Copyright (c) 2006 Fredrik Lindberg. <fli at shapeshifter dot se>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <errno.h>
#include <err.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <bioapi.h>

#include "bioapitool.h"

#define VERSION "1.0"
#define BIR_PATH "/var/db/bioapi/bir"

static void
usage(char *pname)
{

	printf("bioapitool %s, Copyright 2006"
	    " Fredrik Lindberg <fli@shapeshifter.se>\n", VERSION);
	printf("Usage %s [options]\n", pname);
	printf(
	    " -l \t\t List avaiable BSPs\n"
		" -b uuid \t Specify which BSP to use\n"
		" -p path \t Path to BIR database\n"
	    " -c username \t Capture and create BIR record\n"
	    " -v username \t Verify an existing BIR record\n"
	);
}

static int
check_username(char *str)
{

	while (*str != '\0') {
		if (isalnum(*str++) == 0)
			return (1);
	}
	return (0);
}

enum {
	NOACTION,
	CAPTURE,
	ENROLL,
	VERIFY,
	LISTBSPS
};

int
main(int argc, char *argv[])
{
	char *username = NULL, *bsp_id = NULL, *path = NULL;
	char bsp_path[FILENAME_MAX];
	int ch, error, action = NOACTION;
	int i, bsp_count, retval = 0;
	struct bsp_list *bsps;
	BioAPI_HANDLE *handle;

    if (argc < 2) {
		usage(argv[0]);
		exit(EXIT_FAILURE);
	}

	while ((ch = getopt(argc, argv, "hlc:v:b:p:")) != -1) {
		switch (ch) {
		case 'h':
			usage(argv[0]);
			exit(EXIT_SUCCESS);
			break;
		case 'b':
			bsp_id = argv[optind - 1];
			break;
		case 'c':
			username = argv[optind - 1];
			action = CAPTURE;
			break;
		case 'v':
			username = argv[optind - 1];
			action = VERIFY;
			break;
		case 'l':
			action = LISTBSPS;
			break;
		case 'p':
			path =  argv[optind - 1];
			break;
		default:
			usage(argv[0]);
			exit(EXIT_FAILURE);
		}
	} 

	if (getuid() != 0) {
		if (geteuid() == 0)
			setuid(0);
		else
			errx(EXIT_FAILURE,
			    "You do not have sufficient privileges to use this tool");
	}

	error = init_bioapi();
	if (error)
		errx(EXIT_FAILURE, "Failed to initate BioAPI");

	if (path == NULL)
		path = BIR_PATH;

	switch (action) {
	case CAPTURE:
		if (bsp_id == NULL)
			errx(EXIT_FAILURE, "You must specify a BSP UUID");
		if (username == NULL)
			errx(EXIT_FAILURE, "You must specify a user");
		if (check_username(username))
			errx(EXIT_FAILURE, "Illegal username");

		handle = set_bsp(bsp_id);
		if (handle == NULL)
			errx(EXIT_FAILURE, "Failed to initate BSP %s\n", bsp_id);

		snprintf(bsp_path, FILENAME_MAX - 1, "%s/%s", path, bsp_id);
		/* Make sure the path exists */
		error = mkdir(bsp_path, S_IRWXU);
		if (error != 0 && errno != EEXIST) {
			warn("Unable to access %s", bsp_path);
			break;
		}

		error = create_record(handle, username, bsp_path); 

		if (error == 0) {
			printf("Please verify record\n");
			error = verify_record(handle, username, bsp_path);
			if (error == 0)
				printf("Record for user created successfully\n");
			else {
				remove_record(username, bsp_path);
				printf("Failed to verify, records do not match\n");
			}	
		}
		else 
			warnx("Failed to create BIR record\n");
			
		unload_bsp(handle, bsp_id);
		break;
	case VERIFY:
		if (bsp_id == NULL)
			errx(EXIT_FAILURE, "You must specify a BSP UUID");
		if (username == NULL)
			errx(EXIT_FAILURE, "You must specify a user");
		if (check_username(username))
			errx(EXIT_FAILURE, "Illegal username");

		handle = set_bsp(bsp_id);
		if (handle == NULL)
			errx(EXIT_FAILURE, "Failed to initate BSP %s\n", bsp_id);

		snprintf(bsp_path, FILENAME_MAX - 1, "%s/%s", path, bsp_id);

		retval = verify(handle, username, bsp_path);
		if (retval == 0)
			printf("Verification sucessful\n");
		else
			printf("Verification failed\n");

		unload_bsp(handle, bsp_id);
		break;
	case LISTBSPS:
		bsp_count = get_bsp_list(&bsps);
		for (i = 0; i < bsp_count; i++) {
			printf("UUID %s\n", bsps[i].bsp_uuid);
			printf("\t %s %s (%s)\n", bsps[i].bsp_vend,
			    bsps[i].bsp_name, bsps[i].bsp_desc);
		}
		destroy_bsp_list(bsps, bsp_count);
		break;
	case NOACTION:
		/* FALLTHROUGH */
	default:
		usage(argv[0]);
		break;
	}

	close_bioapi(handle);

	return (retval);
}