137 lines
4.1 KiB
C
137 lines
4.1 KiB
C
/*
|
|
* Copyright (c) 2000 Todd C. Miller <Todd.Miller@courtesan.com>
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. The name of the author may not be used to endorse or promote products
|
|
* derived from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
|
|
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
|
|
* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
|
|
* THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
|
|
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
|
|
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
|
|
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
|
|
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
|
|
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
|
|
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#if defined(LIBC_SCCS) && !defined(lint)
|
|
static const char rcsid[] = "$OpenBSD: readpassphrase.c,v 1.7 2001/08/07 19:34:11 millert Exp $";
|
|
#endif /* LIBC_SCCS and not lint */
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include "namespace.h"
|
|
#include <ctype.h>
|
|
#include <errno.h>
|
|
#include <fcntl.h>
|
|
#include <paths.h>
|
|
#include <pwd.h>
|
|
#include <signal.h>
|
|
#include <string.h>
|
|
#include <termios.h>
|
|
#include <unistd.h>
|
|
#include <readpassphrase.h>
|
|
#include "un-namespace.h"
|
|
|
|
char *
|
|
readpassphrase(prompt, buf, bufsiz, flags)
|
|
const char *prompt;
|
|
char *buf;
|
|
size_t bufsiz;
|
|
int flags;
|
|
{
|
|
struct termios term, oterm;
|
|
char ch, *p, *end;
|
|
int input, output;
|
|
sigset_t oset, nset;
|
|
|
|
/* I suppose we could alloc on demand in this case (XXX). */
|
|
if (bufsiz == 0) {
|
|
errno = EINVAL;
|
|
return(NULL);
|
|
}
|
|
|
|
/*
|
|
* Read and write to /dev/tty if available. If not, read from
|
|
* stdin and write to stderr unless a tty is required.
|
|
*/
|
|
if ((input = output = _open(_PATH_TTY, O_RDWR)) == -1) {
|
|
if (flags & RPP_REQUIRE_TTY) {
|
|
errno = ENOTTY;
|
|
return(NULL);
|
|
}
|
|
input = STDIN_FILENO;
|
|
output = STDERR_FILENO;
|
|
}
|
|
|
|
/*
|
|
* We block SIGINT and SIGTSTP so the terminal is not left
|
|
* in an inconsistent state (ie: no echo). It would probably
|
|
* be better to simply catch these though.
|
|
*/
|
|
sigemptyset(&nset);
|
|
sigaddset(&nset, SIGINT);
|
|
sigaddset(&nset, SIGTSTP);
|
|
(void)_sigprocmask(SIG_BLOCK, &nset, &oset);
|
|
|
|
/* Turn off echo if possible. */
|
|
if (tcgetattr(input, &oterm) == 0) {
|
|
memcpy(&term, &oterm, sizeof(term));
|
|
if (!(flags & RPP_ECHO_ON) && (term.c_lflag & ECHO))
|
|
term.c_lflag &= ~ECHO;
|
|
if (term.c_cc[VSTATUS] != _POSIX_VDISABLE)
|
|
term.c_cc[VSTATUS] = _POSIX_VDISABLE;
|
|
(void)tcsetattr(input, TCSAFLUSH|TCSASOFT, &term);
|
|
} else {
|
|
memset(&term, 0, sizeof(term));
|
|
memset(&oterm, 0, sizeof(oterm));
|
|
}
|
|
|
|
(void)_write(output, prompt, strlen(prompt));
|
|
end = buf + bufsiz - 1;
|
|
for (p = buf; _read(input, &ch, 1) == 1 && ch != '\n' && ch != '\r';) {
|
|
if (p < end) {
|
|
if ((flags & RPP_SEVENBIT))
|
|
ch &= 0x7f;
|
|
if (isalpha(ch)) {
|
|
if ((flags & RPP_FORCELOWER))
|
|
ch = tolower(ch);
|
|
if ((flags & RPP_FORCEUPPER))
|
|
ch = toupper(ch);
|
|
}
|
|
*p++ = ch;
|
|
}
|
|
}
|
|
*p = '\0';
|
|
if (!(term.c_lflag & ECHO))
|
|
(void)_write(output, "\n", 1);
|
|
|
|
/* Restore old terminal settings and signal mask. */
|
|
if (memcmp(&term, &oterm, sizeof(term)) != 0)
|
|
(void)tcsetattr(input, TCSAFLUSH|TCSASOFT, &oterm);
|
|
(void)_sigprocmask(SIG_SETMASK, &oset, NULL);
|
|
if (input != STDIN_FILENO)
|
|
(void)_close(input);
|
|
return(buf);
|
|
}
|
|
|
|
char *
|
|
getpass(prompt)
|
|
const char *prompt;
|
|
{
|
|
static char buf[_PASSWORD_LEN + 1];
|
|
|
|
return(readpassphrase(prompt, buf, sizeof(buf), RPP_ECHO_OFF));
|
|
}
|