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/*
* $Source$
* $Author$
*
* Copyright 1990,1991 by the Massachusetts Institute of Technology.
* All Rights Reserved.
*
* Export of this software from the United States of America may
* require a specific license from the United States Government.
* It is the responsibility of any person or organization contemplating
* export to obtain such a license before exporting.
*
* WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
* distribute this software and its documentation for any purpose and
* without fee is hereby granted, provided that the above copyright
* notice appear in all copies and that both that copyright notice and
* this permission notice appear in supporting documentation, and that
* the name of M.I.T. not be used in advertising or publicity pertaining
* to distribution of the software without specific, written prior
* permission. M.I.T. makes no representations about the suitability of
* this software for any purpose. It is provided "as is" without express
* or implied warranty.
*
*
* libos: krb5_read_password for BSD 4.3
*/
#if !defined(lint) && !defined(SABER)
static char rcsid_read_pwd_c[] =
"$Id$";
#endif /* lint */
#include <krb5/krb5.h>
#include <stdio.h>
#include <errno.h>
#include <signal.h>
#include <setjmp.h>
#ifdef sun
#include <sgtty.h>
#endif
#include <krb5/ext-proto.h>
/* POSIX_* are auto-magically defined in <krb5/config.h> at source
configuration time. */
#ifdef POSIX_TERMIOS
#include <termios.h>
#else
#include <sys/ioctl.h>
#endif /* POSIX_TERMIOS */
extern int errno;
#ifdef POSIX_TERMIOS
#define cleanup(errcode) (void) signal(SIGINT, ointrfunc); tcsetattr(fd, TCSANOW, &save_control); return errcode;
#else
#ifdef sun
#define cleanup(errcode) (void) signal(SIGINT, ointrfunc); stty(fd, (char *)&tty_savestate); return errcode;
#else /* !sun */
#define cleanup(errcode) (void) signal(SIGINT, ointrfunc); ioctl(fd, TIOCSETP, (char *)&tty_savestate); return errcode;
#endif /* sun */
#endif /* POSIX_TERMIOS */
static jmp_buf pwd_jump;
static krb5_sigtype
intr_routine()
{
longjmp(pwd_jump, 1);
/*NOTREACHED*/
}
krb5_error_code
krb5_read_password(prompt, prompt2, return_pwd, size_return)
char *prompt;
char *prompt2;
char *return_pwd;
int *size_return;
{
/* adapted from Kerberos v4 des/read_password.c */
#if defined(__STDC__) || defined(mips)
/* readin_string is used after a longjmp, so must be volatile */
volatile
#endif
char *readin_string = 0;
register char *ptr;
int scratchchar;
krb5_sigtype (*ointrfunc)();
#ifdef POSIX_TERMIOS
struct termios echo_control, save_control;
int fd;
/* get the file descriptor associated with stdin */
fd=fileno(stdin);
#ifdef notdef
/* don't want to read password from anything but a terminal */
if (!isatty(fd)) {
fprintf(stderr,"Can only read password from a tty\n"); /* XXX */
errno=ENOTTY; /* say innapropriate ioctl for device */
return errno;
}
#endif /* sun */
if (tcgetattr(fd, &echo_control) == -1)
return errno;
save_control = echo_control;
echo_control.c_lflag &= ~(ECHO|ECHONL);
if (tcsetattr(fd, TCSANOW, &echo_control) == -1)
return errno;
#else
/* 4.3BSD style */
struct sgttyb tty_state, tty_savestate;
int fd;
/* get the file descriptor associated with stdin */
fd=fileno(stdin);
#ifdef notdef
/* don't want to read password from anything but a terminal */
if (!isatty(fd)) {
fprintf(stderr,"Can only read password from a tty\n"); /* XXX */
errno=ENOTTY; /* say innapropriate ioctl for device */
return errno;
}
#endif /* sun */
/* save terminal state */
if (
#ifdef sun
gtty(fd,(char *)&tty_savestate)
#else
ioctl(fd,TIOCGETP,(char *)&tty_savestate)
#endif
== -1)
return errno;
tty_state = tty_savestate;
tty_state.sg_flags &= ~ECHO;
if (
#ifdef sun
stty(fd,(char *)&tty_state)
#else
ioctl(fd,TIOCSETP,(char *)&tty_state)
#endif
== -1)
return errno;
#endif
if (setjmp(pwd_jump)) {
/* interrupted */
if (readin_string) {
(void) memset((char *)readin_string, 0, *size_return);
krb5_xfree(readin_string);
}
(void) memset(return_pwd, 0, *size_return);
cleanup(KRB5_LIBOS_PWDINTR);
}
/* save intrfunc */
ointrfunc = signal(SIGINT, intr_routine);
/* put out the prompt */
(void) fputs(prompt,stdout);
(void) fflush(stdout);
(void) memset(return_pwd, 0, *size_return);
if (fgets(return_pwd, *size_return, stdin) == NULL) {
/* error */
(void) putchar('\n');
(void) memset(return_pwd, 0, *size_return);
cleanup(KRB5_LIBOS_CANTREADPWD);
}
(void) putchar('\n');
/* fgets always null-terminates the returned string */
/* replace newline with null */
if (ptr = strchr(return_pwd, '\n'))
*ptr = '\0';
else /* flush rest of input line */
do {
scratchchar = getchar();
} while (scratchchar != EOF && scratchchar != '\n');
if (prompt2) {
/* put out the prompt */
(void) fputs(prompt2,stdout);
(void) fflush(stdout);
readin_string = malloc(*size_return);
if (!readin_string) {
(void) memset(return_pwd, 0, *size_return);
cleanup(ENOMEM);
}
(void) memset((char *)readin_string, 0, *size_return);
if (fgets((char *)readin_string, *size_return, stdin) == NULL) {
/* error */
(void) putchar('\n');
(void) memset((char *)readin_string, 0, *size_return);
(void) memset(return_pwd, 0, *size_return);
krb5_xfree(readin_string);
cleanup(KRB5_LIBOS_CANTREADPWD);
}
(void) putchar('\n');
if (ptr = strchr((char *)readin_string, '\n'))
*ptr = '\0';
else /* need to flush */
do {
scratchchar = getchar();
} while (scratchchar != EOF && scratchchar != '\n');
/* compare */
if (strncmp(return_pwd, (char *)readin_string, *size_return)) {
(void) memset((char *)readin_string, 0, *size_return);
(void) memset(return_pwd, 0, *size_return);
krb5_xfree(readin_string);
cleanup(KRB5_LIBOS_BADPWDMATCH);
}
(void) memset((char *)readin_string, 0, *size_return);
krb5_xfree(readin_string);
}
/* reset intrfunc */
(void) signal(SIGINT, ointrfunc);
#ifdef POSIX_TERMIOS
if (tcsetattr(fd, TCSANOW, &save_control) == -1)
return errno;
#else
if (
#ifdef sun
stty(fd, (char *)&tty_savestate)
#else
ioctl(fd, TIOCSETP, (char *)&tty_savestate)
#endif
== -1)
return errno;
#endif
*size_return = strlen(return_pwd);
return 0;
}
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