/*
 * Shows user info from local pwfile.
 *
 * Usage: userinfo username
 */

#define _XOPEN_SOURCE
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "pwdblib.h"   /* include header declarations for pwdblib.c */

/* Define some constants. */
#define USERNAME_SIZE (32)
#define PASSWORD_SIZE (32)
#define NOUSER (-1)

void read_username(char *username)
{
  printf("login: ");
  fgets(username, USERNAME_SIZE, stdin);

  /* remove the newline included by getline() */
  username[strlen(username) - 1] = '\0';
}



int main(int argc, char **argv)
{
	char username[USERNAME_SIZE];
	char password[PASSWORD_SIZE];
	char saltPass[PASSWORD_SIZE];
	char salt[2];

	while(1 == 1) {
		//reads username from terminal
		read_username(username);
		//reads password from terminal
		strcpy(password, getpass("password: "));
		//gets pw structure from pwfile
		struct pwdb_passwd *p = pwdb_getpwnam(username);

		if(p->pw_failed > 4) {
			printf("Too many login attemps. Contact administrator.\n");

		} else if (p != NULL) {
			//gets hashed password from structure
			strcpy(saltPass, p->pw_passwd);
			//gets salt from hashed password
			strncpy(salt, saltPass, 2);
			//compares read hashed password to stores hashed password
			if(strcmp(crypt(password,salt), saltPass) == 0) {
				p->pw_failed = 0;
				p->pw_age = p->pw_age+1;
				pwdb_update_user(p);
				printf("User authenticated succesfully!\n");
				if(p->pw_age > 9) {
					printf("Remember to change your password.\n");
				}
				return 0;
			} else {
				p->pw_failed = p->pw_failed+1;
				pwdb_update_user(p);
				printf("Incorrect password.\n");
				if(p->pw_failed > 4) {
					printf("Too many login attemps. Contact administrator.\n");
				}
			}
		} else {
			printf("User not found.\n");
		}
	}

}