freebsd-src/contrib/libarchive/libarchive_fe/passphrase.c
Martin Matuska 13d826ff94 libarchive: merge from vendor branch
Libarchive 3.7.4 + three fixes from master

Security fixes:
 #2135 rar: Fix OOB in rar e8 filter (CVE-2024-26256)
 #2145 zip: Fix out of boundary access
 #2148 rar: Fix OOB in rar delta filter
 #2149 rar: Fix OOB in rar audio filter

Important bugfixes:
 #2131 7zip: Limit amount of properties
 #2110 bsdtar: Fix error handling around strtol() usages
 #2116 passphrase: Never allow empty passwords
 #2124 rar: Fix "File CRC Error" when extracting specific rar4 archives
 #2123 xar: Avoid infinite link loop
 #2150 xar: Fix another infinite loop and expat error handling
 #2108 zip: Update AppleDouble support for directories
 #2071 zstd: Implement core detectiongit

PR:		278588 (exp-run)
MFC after:	1 day
2024-04-29 10:17:53 +02:00

338 lines
9.4 KiB
C

/*-
* Copyright (c) 2014 Michihiro NAKAJIMA
* 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
* in this position and unchanged.
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``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(S) 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.
*/
/* $OpenBSD: readpassphrase.c,v 1.27 2019/01/25 00:19:25 millert Exp $ */
/*
* Copyright (c) 2000-2002, 2007, 2010
* Todd C. Miller <millert@openbsd.org>
*
* 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.
*
* 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.
*/
/* OPENBSD ORIGINAL: lib/libc/gen/readpassphrase.c */
#include "lafe_platform.h"
#include <errno.h>
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef HAVE_READPASSPHRASE_H
#include <readpassphrase.h>
#endif
#include "err.h"
#include "passphrase.h"
#ifndef HAVE_READPASSPHRASE
#define RPP_ECHO_OFF 0x00 /* Turn off echo (default). */
#define RPP_ECHO_ON 0x01 /* Leave echo on. */
#define RPP_REQUIRE_TTY 0x02 /* Fail if there is no tty. */
#define RPP_FORCELOWER 0x04 /* Force input to lower case. */
#define RPP_FORCEUPPER 0x08 /* Force input to upper case. */
#define RPP_SEVENBIT 0x10 /* Strip the high bit from input. */
#define RPP_STDIN 0x20 /* Read from stdin, not /dev/tty */
#if defined(_WIN32) && !defined(__CYGWIN__)
#include <string.h>
#include <windows.h>
static char *
readpassphrase(const char *prompt, char *buf, size_t bufsiz, int flags)
{
HANDLE hStdin, hStdout;
DWORD mode, rbytes;
BOOL success;
(void)flags;
hStdin = GetStdHandle(STD_INPUT_HANDLE);
if (hStdin == INVALID_HANDLE_VALUE)
return (NULL);
hStdout = GetStdHandle(STD_OUTPUT_HANDLE);
if (hStdout == INVALID_HANDLE_VALUE)
return (NULL);
success = GetConsoleMode(hStdin, &mode);
if (!success)
return (NULL);
mode &= ~ENABLE_ECHO_INPUT;
mode |= ENABLE_LINE_INPUT | ENABLE_PROCESSED_INPUT;
success = SetConsoleMode(hStdin, mode);
if (!success)
return (NULL);
success = WriteFile(hStdout, prompt, (DWORD)strlen(prompt),
NULL, NULL);
if (!success)
return (NULL);
success = ReadFile(hStdin, buf, (DWORD)bufsiz - 1, &rbytes, NULL);
if (!success)
return (NULL);
WriteFile(hStdout, "\r\n", 2, NULL, NULL);
buf[rbytes] = '\0';
/* Remove trailing carriage return(s). */
buf[strcspn(buf, "\r\n")] = '\0';
return (buf);
}
#else /* _WIN32 && !__CYGWIN__ */
#include <assert.h>
#include <ctype.h>
#include <fcntl.h>
#ifdef HAVE_PATHS_H
#include <paths.h>
#endif
#include <signal.h>
#include <string.h>
#include <termios.h>
#include <unistd.h>
#ifndef _PATH_TTY
#define _PATH_TTY "/dev/tty"
#endif
#ifdef TCSASOFT
# define _T_FLUSH (TCSAFLUSH|TCSASOFT)
#else
# define _T_FLUSH (TCSAFLUSH)
#endif
/* SunOS 4.x which lacks _POSIX_VDISABLE, but has VDISABLE */
#if !defined(_POSIX_VDISABLE) && defined(VDISABLE)
# define _POSIX_VDISABLE VDISABLE
#endif
#define M(a,b) (a > b ? a : b)
#define MAX_SIGNO M(M(M(SIGALRM, SIGHUP), \
M(SIGINT, SIGPIPE)), \
M(M(SIGQUIT, SIGTERM), \
M(M(SIGTSTP, SIGTTIN), SIGTTOU)))
static volatile sig_atomic_t signo[MAX_SIGNO + 1];
static void
handler(int s)
{
assert(s <= MAX_SIGNO);
signo[s] = 1;
}
static char *
readpassphrase(const char *prompt, char *buf, size_t bufsiz, int flags)
{
ssize_t nr;
int input, output, save_errno, i, need_restart;
char ch, *p, *end;
struct termios term, oterm;
#ifdef HAVE_SIGACTION
struct sigaction sa, savealrm, saveint, savehup, savequit, saveterm;
struct sigaction savetstp, savettin, savettou, savepipe;
#endif
/* I suppose we could alloc on demand in this case (XXX). */
if (bufsiz == 0) {
errno = EINVAL;
return(NULL);
}
restart:
for (i = 0; i <= MAX_SIGNO; 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 ((flags & RPP_STDIN) ||
(input = output = open(_PATH_TTY, O_RDWR)) == -1) {
if (flags & RPP_REQUIRE_TTY) {
errno = ENOTTY;
return(NULL);
}
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 != STDIN_FILENO && tcgetattr(input, &oterm) == 0) {
memcpy(&term, &oterm, sizeof(term));
if (!(flags & RPP_ECHO_ON))
term.c_lflag &= ~(ECHO | ECHONL);
#ifdef VSTATUS
if (term.c_cc[VSTATUS] != _POSIX_VDISABLE)
term.c_cc[VSTATUS] = _POSIX_VDISABLE;
#endif
(void)tcsetattr(input, _T_FLUSH, &term);
} else {
memset(&term, 0, sizeof(term));
term.c_lflag |= ECHO;
memset(&oterm, 0, sizeof(oterm));
oterm.c_lflag |= ECHO;
}
#ifdef HAVE_SIGACTION
/*
* Catch signals that would otherwise cause the user to end
* up with echo turned off in the shell. Don't worry about
* things like SIGXCPU and SIGVTALRM for now.
*/
sigemptyset(&sa.sa_mask);
sa.sa_flags = 0; /* don't restart system calls */
sa.sa_handler = handler;
/* Keep this list in sync with MAX_SIGNO! */
(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);
#endif
if (!(flags & RPP_STDIN)) {
int r = write(output, prompt, strlen(prompt));
(void)r;
}
end = buf + bufsiz - 1;
p = buf;
while ((nr = read(input, &ch, 1)) == 1 && ch != '\n' && ch != '\r') {
if (p < end) {
if ((flags & RPP_SEVENBIT))
ch &= 0x7f;
if (isalpha((unsigned char)ch)) {
if ((flags & RPP_FORCELOWER))
ch = (char)tolower((unsigned char)ch);
if ((flags & RPP_FORCEUPPER))
ch = (char)toupper((unsigned char)ch);
}
*p++ = ch;
}
}
*p = '\0';
save_errno = errno;
if (!(term.c_lflag & ECHO)) {
int r = write(output, "\n", 1);
(void)r;
}
/* Restore old terminal settings and signals. */
if (memcmp(&term, &oterm, sizeof(term)) != 0) {
const int sigttou = signo[SIGTTOU];
/* Ignore SIGTTOU generated when we are not the fg pgrp. */
while (tcsetattr(input, _T_FLUSH, &oterm) == -1 &&
errno == EINTR && !signo[SIGTTOU])
continue;
signo[SIGTTOU] = sigttou;
}
#ifdef HAVE_SIGACTION
(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);
#endif
if (input != STDIN_FILENO)
(void)close(input);
/*
* If we were interrupted by a signal, resend it to ourselves
* now that we have restored the signal handlers.
*/
for (i = 0; i <= MAX_SIGNO; i++) {
if (signo[i]) {
kill(getpid(), i);
switch (i) {
case SIGTSTP:
case SIGTTIN:
case SIGTTOU:
need_restart = 1;
}
}
}
if (need_restart)
goto restart;
if (save_errno)
errno = save_errno;
return(nr == -1 ? NULL : buf);
}
#endif /* _WIN32 && !__CYGWIN__ */
#endif /* HAVE_READPASSPHRASE */
char *
lafe_readpassphrase(const char *prompt, char *buf, size_t bufsiz)
{
char *p;
p = readpassphrase(prompt, buf, bufsiz, RPP_ECHO_OFF);
if (p == NULL) {
switch (errno) {
case EINTR:
break;
default:
lafe_errc(1, errno, "Couldn't read passphrase");
/* NOTREACHED */
}
}
return (p);
}