-/* $OpenBSD: readpassphrase.c,v 1.12 2001/12/15 05:41:00 millert Exp $ */
+/* $OpenBSD: readpassphrase.c,v 1.24 2013/11/24 23:51:29 deraadt Exp $ */
/*
- * Copyright (c) 2000 Todd C. Miller <Todd.Miller@courtesan.com>
- * All rights reserved.
+ * Copyright (c) 2000-2002, 2007, 2010
+ * Todd C. Miller <Todd.Miller@courtesan.com>
*
- * 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.
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
*
- * 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.
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ * Sponsored in part by the Defense Advanced Research Projects
+ * Agency (DARPA) and Air Force Research Laboratory, Air Force
+ * Materiel Command, USAF, under agreement number F39502-99-1-0512.
*/
-#if defined(LIBC_SCCS) && !defined(lint)
-static const char rcsid[] = "$OpenBSD: readpassphrase.c,v 1.12 2001/12/15 05:41:00 millert Exp $";
-#endif /* LIBC_SCCS and not lint */
#include <sys/cdefs.h>
-__FBSDID("$FreeBSD: src/lib/libc/gen/readpassphrase.c,v 1.6 2002/03/09 03:16:41 green Exp $");
#include "xlocale_private.h"
#include <unistd.h>
#include <readpassphrase.h>
#include "un-namespace.h"
+#include "libc_private.h"
-static volatile sig_atomic_t signo;
+static volatile int signo[NSIG];
static void handler(int);
readpassphrase(const char *prompt, char *buf, size_t bufsiz, int flags)
{
ssize_t nr;
- int input, output, save_errno;
+ int input, output, save_errno, i, need_restart, input_is_tty;
char ch, *p, *end;
struct termios term, oterm;
- struct sigaction sa, saveint, savehup, savequit, saveterm;
- struct sigaction savetstp, savettin, savettou;
+ struct sigaction sa, savealrm, saveint, savehup, savequit, saveterm;
+ struct sigaction savetstp, savettin, savettou, savepipe;
locale_t loc = __current_locale();
/* I suppose we could alloc on demand in this case (XXX). */
}
restart:
+ for (i = 0; i < NSIG; i++)
+ signo[i] = 0;
+ nr = -1;
+ save_errno = 0;
+ need_restart = 0;
/*
* 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_is_tty = 0;
+ if (!(flags & RPP_STDIN)) {
+ input = output = _open(_PATH_TTY, O_RDWR | O_CLOEXEC);
+ if (input == -1) {
+ if (flags & RPP_REQUIRE_TTY) {
+ errno = ENOTTY;
+ return(NULL);
+ }
+ input = STDIN_FILENO;
+ output = STDERR_FILENO;
+ } else {
+ input_is_tty = 1;
}
+ } else {
input = STDIN_FILENO;
output = STDERR_FILENO;
}
+ /*
+ * Turn off echo if possible.
+ * If we are using a tty but are not the foreground pgrp this will
+ * generate SIGTTOU, so do it *before* installing the signal handlers.
+ */
+ if (input_is_tty && tcgetattr(input, &oterm) == 0) {
+ memcpy(&term, &oterm, sizeof(term));
+ if (!(flags & RPP_ECHO_ON))
+ term.c_lflag &= ~(ECHO | ECHONL);
+ 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));
+ term.c_lflag |= ECHO;
+ memset(&oterm, 0, sizeof(oterm));
+ oterm.c_lflag |= ECHO;
+ }
+
/*
* Catch signals that would otherwise cause the user to end
* up with echo turned off in the shell. Don't worry about
- * things like SIGALRM and SIGPIPE for now.
+ * things like SIGXCPU and SIGVTALRM for now.
*/
sigemptyset(&sa.sa_mask);
sa.sa_flags = 0; /* don't restart system calls */
sa.sa_handler = handler;
- (void)_sigaction(SIGINT, &sa, &saveint);
+ (void)_sigaction(SIGALRM, &sa, &savealrm);
(void)_sigaction(SIGHUP, &sa, &savehup);
+ (void)_sigaction(SIGINT, &sa, &saveint);
+ (void)_sigaction(SIGPIPE, &sa, &savepipe);
(void)_sigaction(SIGQUIT, &sa, &savequit);
(void)_sigaction(SIGTERM, &sa, &saveterm);
(void)_sigaction(SIGTSTP, &sa, &savetstp);
(void)_sigaction(SIGTTIN, &sa, &savettin);
(void)_sigaction(SIGTTOU, &sa, &savettou);
- /* Turn off echo if possible. */
- if (tcgetattr(input, &oterm) == 0) {
- memcpy(&term, &oterm, sizeof(term));
- if (!(flags & RPP_ECHO_ON))
- term.c_lflag &= ~(ECHO | ECHONL);
- 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));
+ if (!(flags & RPP_STDIN))
+ (void)_write(output, prompt, strlen(prompt));
end = buf + bufsiz - 1;
- for (p = buf; (nr = _read(input, &ch, 1)) == 1 && ch != '\n' && ch != '\r';) {
+ p = buf;
+ while ((nr = _read(input, &ch, 1)) == 1 && ch != '\n' && ch != '\r') {
if (p < end) {
if ((flags & RPP_SEVENBIT))
ch &= 0x7f;
if (isalpha_l(ch, loc)) {
if ((flags & RPP_FORCELOWER))
- ch = tolower_l(ch, loc);
+ ch = (char)tolower_l(ch, loc);
if ((flags & RPP_FORCEUPPER))
- ch = toupper_l(ch, loc);
+ ch = (char)toupper_l(ch, loc);
}
*p++ = ch;
}
(void)_write(output, "\n", 1);
/* Restore old terminal settings and signals. */
- if (memcmp(&term, &oterm, sizeof(term)) != 0)
- (void)tcsetattr(input, TCSANOW|TCSASOFT, &oterm);
- (void)_sigaction(SIGINT, &saveint, NULL);
+ if (memcmp(&term, &oterm, sizeof(term)) != 0) {
+ while (tcsetattr(input, TCSAFLUSH|TCSASOFT, &oterm) == -1 &&
+ errno == EINTR && !signo[SIGTTOU])
+ continue;
+ }
+ (void)_sigaction(SIGALRM, &savealrm, NULL);
(void)_sigaction(SIGHUP, &savehup, NULL);
+ (void)_sigaction(SIGINT, &saveint, NULL);
(void)_sigaction(SIGQUIT, &savequit, NULL);
+ (void)_sigaction(SIGPIPE, &savepipe, NULL);
(void)_sigaction(SIGTERM, &saveterm, NULL);
(void)_sigaction(SIGTSTP, &savetstp, NULL);
(void)_sigaction(SIGTTIN, &savettin, NULL);
(void)_sigaction(SIGTTOU, &savettou, NULL);
- if (input != STDIN_FILENO)
+ if (input_is_tty)
(void)_close(input);
/*
* If we were interrupted by a signal, resend it to ourselves
* now that we have restored the signal handlers.
*/
- if (signo) {
- kill(getpid(), signo);
- switch (signo) {
- case SIGTSTP:
- case SIGTTIN:
- case SIGTTOU:
- signo = 0;
- goto restart;
+ for (i = 0; i < NSIG; i++) {
+ if (signo[i]) {
+ kill(getpid(), i);
+ switch (i) {
+ case SIGTSTP:
+ case SIGTTIN:
+ case SIGTTOU:
+ need_restart = 1;
+ }
}
}
+ if (need_restart)
+ goto restart;
- errno = save_errno;
+ if (save_errno)
+ errno = save_errno;
return(nr == -1 ? NULL : buf);
}
char *
getpass(const char *prompt)
{
- static char buf[_PASSWORD_LEN + 1];
+ const size_t bufsiz = _PASSWORD_LEN + 1;
+ static char *buf = NULL;
- if (readpassphrase(prompt, buf, sizeof(buf), RPP_ECHO_OFF) == NULL)
+ if (buf == NULL) {
+ buf = malloc(bufsiz);
+ if (buf == NULL) {
+ return NULL;
+ }
+ }
+
+ if (readpassphrase(prompt, buf, bufsiz, RPP_ECHO_OFF) == NULL) {
buf[0] = '\0';
- return(buf);
+ }
+ return buf;
}
static void handler(int s)
{
-
- signo = s;
+ signo[s] = 1;
}
projects / apple / libc.git / blobdiff