#include <stdio.h>

/* Password checking function. This one always returns false,
   the general idea is to somehow bypass this...
*/

//unsigned long get_sp(void) {
//  __asm__("movl %esp,%eax");
//}

int checkpw(char *name,char *password) {
  char s[100];		/* where we make a copy of the password */

  //  printf("stack is at %x\n",get_sp());
  strcpy(s,password);		/* blind copy */

  /* Here is some real passwod checking code that 
     for our purposes always returns false (0). */

  return(0);
}

/* authenticate returns a 1 if the user,password are OK,
   otherwise it returns 0

   The only valid username is "rotor" 
*/


int authenticate(char *user, char *password) {
  if (strcmp(user,"rotor")==0) {
	return( checkpw(user,password) );
  } else {
	return(0);
  }
}

/* This procedure adds some money to an account */

void credit_account(char *name, int amount) {
  printf("Crediting account for %s with %d\n",name,amount);
  /* The real system has database update code here
     that would execute right after the printf */
}

/* main program for stack bomb assignment */



int main() {

  char name[1000];	/* buffer used to read in a name from stdin */
  char password[1000];	/* buffer used to hold password */

  /* You may replace the code here that reads the name and password
     from standard input (this is the only code you can replace). */

  fgets(name,1000,stdin);        /* read one line from standard input */
  name[strlen(name)-1]=0;	 /* strip newline */

  fgets(password,1000,stdin);	/* read the second line */
  password[strlen(password)-1]=0;	/* strip newline */

  /* -------------------------------------------------------------
     You can't change any code below this line !
  */
  if (authenticate(name,password)) {
    credit_account(name,100);
  } else {
    printf("Boom! (sorry)\n");
  }
}