/*Works on the old 16-bit version of microtype */
#include <stdio.h>
#include <string.h>
#include <stdlib.h>

int main() {
   int i;
   char fname[256],buff[26];
   FILE *f;
   while (true) {
      system("cls");
      printf (
         "MicroType Account Cracker - by Jakash3\n\n"
         "Enter microtype data filename: "
      );
      gets(fname);
      f=fopen(fname,"r");
      if (!f) {
         printf("Failed to open file!");
         goto end;
      }
      fseek(f,6,0);
      if (fread(buff,1,26,f)<26) {
        printf("Failed to read file!");
         goto end;
      }
      printf(
         "\nUsername: %s"
         "\nPassword: ",
         buff
      );
      fseek(f,0x2b,0);
      fread(buff,1,16,f);
      for (i=0;i<15;i++) {
         printf("%c",buff[i]^0xAA);
      }
      printf("\nPeriod number: ");
      fseek(f,0x20,0);
      fread(buff,1,1,f);
      printf("%c",(char*)buff[0]);
      freopen(fname,"r+",f);
      if (!f) { goto end; }
      printf (
         "\n\nSelect an option:\n"
         "1) Change username\n"
         "2) Change pasword\n"
         "3) Change period number\n"
         "4) Quit\n\n"
      );
      gets(buff);
      if (!memcmp(buff,"1",1)) {
         printf("Enter new username (max 25): ");
         memset(buff,0,26);
         gets(buff);
         fseek(f,6,0);
         if (fwrite(buff,1,26,f)<26) {
            printf("Failed to set new username!");
         } else {
            printf("Username successfully set.");
         }
         getchar();
      } else if (!memcmp(buff,"2",1)) {
         printf("Enter new password (max 16): ");
         memset(buff,0xAA,16);
         gets(buff);
         for (i=0;i<strlen(buff);i++) {
            buff[i]^=0xAA;
         }
         buff[i]=0xAA;
         fseek(f,0x2b,0);
         if (fwrite(buff,1,16,f)<16) {
            printf("Failed to set new password!");
         } else {
            printf("Password sucessfully set.");
         }
         getchar();
      } else if (!memcmp(buff,"3",1)) {
         printf("Enter new period number: ");
         gets(buff);
         fseek(f,0x20,0);
         if (putc(buff[0],f)==EOF) {
            printf("Failed to set period number!");
         } else {
            printf("Period number successfully set.");
         }
         getchar();
      } else if (!memcmp(buff,"4",1)) {
         fclose(f);
         return 0;
      }
      fclose(f);
   }
end:
   fclose(f);
   printf("\n\nPress Enter to quit. . .");
   getchar();
   return 0;
}