/*****************************************************************************/
/*                                                                           */
/* File: appl.cpp                                                            */
/*                                                                           */
/*****************************************************************************/

#include "appl.h"
#include "globals.h"
#include "prototypes.h"

#include "global.h"
#include "md5.h"

#include &lt;signal.h&gt;  // Signal/break key handling, <signal.h>
#include &lt;termios.h&gt; // Terminal handling <termios.h>

const int MAX_PASS_LEN = 8;

/*****************************************************************************/

main ()

    /* There are tons of things wrong with this program. Can you
       see what they are ?                                       */

{ char passwd[MAX_PASS_LEN];
  char digest[16];
  MD5_CTX context;

strcpy (passwd,getpass("Enter password: "));

printf ("Your password was [%s]...\n",passwd);

cfMD5Init(&context);
cfMD5Update(&context,passwd,MAX_PASS_LEN);
cfMD5Final(digest,&context);

printf ("Md5 encrypted form is [%s]\n",cfMDPrint(digest));
}

/*****************************************************************************/

char *getpass(const char *prompt)

{ static char buffer[MAX_PASS_LEN+1];
  sigset_t sig,sigsave;
  struct termios term,termsave;
  FILE *fp;
  char *sp,ch;

// Never mind the stupid C++ streams library. Use the C functions.

if ((fp = fopen(ctermid(NULL),"r+")) == NULL)
   {
   perror("fopen");
   return NULL;              // What happens to the strcpy if this is NULL?
   }

setbuf(fp,NULL);
sigemptyset(&sig);
sigaddset(&sig,SIGINT);
sigaddset(&sig,SIGTSTP);
sigprocmask(SIG_BLOCK,&sig,&sigsave);

// On NT we have GetConsoleMode and SetConsoleMode ENABLE_ECHO_INPUT

if (tcgetattr(fileno(fp),&termsave) == -1)
   {
   perror("tcgetattr");
   sigprocmask(SIG_SETMASK,&sigsave,NULL);
   return NULL;
   }

fputs("Switching off echo...\n",fp);

term = termsave;
term.c_lflag &= ~(ECHO|ECHOE|ECHOK|ECHONL);
tcsetattr(fileno(fp),TCSAFLUSH,&term);

fputs(prompt,fp);

sp = buffer;

while (ch = getc(fp))
   {
   if (ch == '\n' || ch == EOF)
      {
      break;
      }

   if (sp < &(buffer[MAX_PASS_LEN]))
      {
      *sp++ = ch;   // Feed the characters in manually
      }
   }

*sp = '\0';         // Terminating character

putc('\n',fp);      // New line

tcsetattr(fileno(fp),TCSAFLUSH,&termsave);

fputs("Echo restored...\n",fp)
;
sigprocmask(SIG_SETMASK,&sigsave,NULL);
fclose(fp);

return buffer;
}