/*
 * Remote Laboratory FPGA Server
 *
 * 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 3 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; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * (c) 2009 Timothy Pearson
 * Raptor Engineering
 * http://www.raptorengineeringinc.com
 */

#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <pwd.h>
#include <time.h>

char *MakeMD5String(inString);

// Username information
struct passwd *pw;
uid_t uid;

// Configuration stuff
static const char filename[] = "/etc/remotefpga_users.conf";
char linedata [256];

// Valid usernames
char mdfives [10000][32];

int validateString(char *inputString) {
	int i;
	char *current_file_username;
	char *current_file_md5_hash;
	time_t mytime;

	FILE *file = fopen(filename, "r");
	if (file != NULL) {
		char line [256];	// or other suitable maximum line size
		i=0;
		// read a line
		while (fgets(line, sizeof line, file) != NULL) {
			// Parse the line and update global variables (current line in variable "line")
			switch (i) {
				case 0: line[strlen(line)-1]=0;
					current_file_username = strdup(line);
					i=1;
					break;
				case 1: line[strlen(line)-1]=0;
					printf("Username: %s\n\rPassword: %s\n\r", current_file_username, line);
					current_file_username = strcat(current_file_username, line);
    					//mytime = time();
    					//printf ("%s\n\r", mytime.minute());
					current_file_username = strcat(current_file_username, line);
					printf("Authstring: %s\n\r", current_file_username);
					printf("MD5: %s\n\r", MakeMD5String(current_file_username));
					i=0;
					break;
			}
		}
		fclose(file);
	}
	else
	{
		printf("[WARN] Unable to open configuration file %s\n\r", filename);
		return 1;
	}

	return 0;
}

int main(int argc, char *argv[])
{
	if (argc < 2) {
		printf("[FAIL] Invalid argument(s)\n\rOptions:\n\r  update <username> <password>\n\r  server\n\r");
	}
	else {
		if ((strcmp(argv[1], "update") == 0) && (argc > 1)) {
			uid = geteuid();
			pw = getpwuid(uid);
			if (pw) {
				printf("[INFO] Updating credentials for user %s\n\r", pw->pw_name);
			}
			else {
				printf("[FAIL] Cannot find name for user ID %lu\n\r", (unsigned long int) uid);
				return 1;
			}
		}
		else if (strcmp(argv[1], "server") == 0) {
			printf("[INFO] Starting server...\n\r");
			validateString("1234");
		}
		else {
			printf("[FAIL] Invalid argument(s)\n\rOptions:\n\r  update <username> <password>\n\r  server\n\r");
		}
	}

	return EXIT_SUCCESS;
}