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/*
* passphrase.c
* Copyright (C) 1995 Kazuhiko Yamamoto
* Kazuhiko Yamamoto <kazu@is.aist-nara.ac.jp>
*/
#include "config.h"
#include "donkey.h"
private void turnecho PROTO((FILE *fp, int on));
private RETSIGTYPE get_sigint(); /* signal */
FILE *fp, *outfp;
private void turnecho(fp, on)
FILE *fp;
int on;
{
#ifdef HAVE_TERMIOS_H
static struct termios orig, noecho, *tp;
#else
# ifdef HAVE_TERMIO_H
static struct termio orig, noecho, *tp;
# else
static struct sgttyb orig, noecho, *tp;
# endif
#endif
static int state = 0;
int fd = fileno(fp);
if (!isatty(fd))
return; /* return void */
if (state == 0) {
#ifdef HAVE_TERMIOS_H
if (tcgetattr(fd, &orig) < 0)
perror("tcgetattr");
noecho = orig;
noecho.c_lflag &= ~ECHO;
#else
# ifdef HAVE_TERMIO_H
if (ioctl(fd, TCGETA, &orig) < 0)
perror("ioctl");
noecho = orig;
noecho.c_lflag &= ~ECHO;
# else
if (ioctl(fd, TIOCGETP, &orig) < 0)
perror("ioctl");
noecho = orig;
noecho.sg_flags &= ~ECHO;
# endif
#endif
state = 1;
}
tp = NULL;
if (on && state == 2) {
/* Turn echo back on. */
tp = &orig;
state = 1;
} else if (!on && state == 1) {
/* Turn echo off. */
tp = &noecho;
state = 2;
}
if (tp != NULL) {
#ifdef HAVE_TERMIOS_H
if (tcsetattr(fd, TCSANOW, tp) < 0)
perror("tcsetattr");
#else
# ifdef HAVE_TERMIO_H
if (ioctl(fd, TCSETA, tp) < 0)
perror("ioctl");
# else
if (ioctl(fd, TIOCSETP, tp) < 0)
perror("ioctl");
# endif
#endif /* !HAVE_TERMIOS_H */
}
}
private RETSIGTYPE get_sigint()
{
(void) rewind(outfp);
turnecho(fp, 1);
(void) fputc('\n', outfp);
if (fp != stdin)
(void)fclose(fp);
exit(0);
}
/*
* read size-free passphrase without echo
*/
public int passphrase(prompt, phrase, size, reject_short)
char *prompt, *phrase;
int size, reject_short;
{
sigtype oldintr;
#ifdef SIGTSTP
sigtype oldtstp;
#endif
/*
* read and write to /dev/tty if possible; else read from
* stdin and write to stderr.
*/
if ((outfp = fp = fopen("/dev/tty", "r+")) == NULL) {
outfp = stderr;
fp = stdin;
}
/*
* We don't want to return with echoing off.
*/
oldintr = signal(SIGINT, get_sigint);
/*
* Ignore suspend.
*/
#ifdef SIGTSTP
oldtstp = signal(SIGTSTP, SIG_IGN);
#endif
turnecho(fp, 0);
(void) fputs(prompt, outfp);
(void) fflush(outfp);
(void) rewind(outfp);
phrase[0] = '\0';
if (fgets(phrase, size, fp) != NULL)
phrase[strlen(phrase) - 1] = '\0';
(void) fflush(fp);
if (reject_short)
while (strlen(phrase) < PASS_PHRASE_MIN_LEN) {
(void) rewind(outfp);
(void) fputs("\nYour passphrase is too short. Enter longer passphrase.\n", outfp);
(void) fputs(prompt, outfp);
(void) fflush(outfp);
(void) rewind(outfp);
phrase[0] = '\0';
if (fgets(phrase, size, fp) != NULL)
phrase[strlen(phrase) - 1] = '\0';
(void) fflush(fp);
}
(void) rewind(outfp);
turnecho(fp, 1);
(void) fputc('\n', outfp);
(void) signal(SIGINT, oldintr);
#ifdef SIGTSTP
(void) signal(SIGTSTP, oldtstp);
#endif
if (fp != stdin)
(void)fclose(fp);
return(RET_SUCCESS);
}
/*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*
* Copyright (c) 1995 Mike Gleason, NCEMRSoft.
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted provided
* that: (1) source distributions retain this entire copyright notice and
* comment, and (2) distributions may not be sold for profit on physical
* media such as disks, tapes, and CD-ROMS, without expressed written
* permission.
*/
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