Add readpassphrase.c in src/ext
This is taken verbatim from openssh 6.8p1, which appears to have lightly tweaked it from the openbsd version.
This commit is contained in:
Nick Mathewson
parent
d68133c745
commit
8d44ce910d
19
LICENSE
19
LICENSE
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@ -249,7 +249,26 @@ As a special exception to the GNU General Public License, if you
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distribute this file as part of a program that contains a
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configuration script generated by Autoconf, you may include it under
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the same distribution terms that you use for the rest of that program.
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===============================================================================
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src/ext/readpassphrase.[ch] are distributed under this license:
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Copyright (c) 2000-2002, 2007 Todd C. Miller <Todd.Miller@courtesan.com>
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Permission to use, copy, modify, and distribute this software for any
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purpose with or without fee is hereby granted, provided that the above
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copyright notice and this permission notice appear in all copies.
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THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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Sponsored in part by the Defense Advanced Research Projects
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Agency (DARPA) and Air Force Research Laboratory, Air Force
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Materiel Command, USAF, under agreement number F39502-99-1-0512.
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===============================================================================
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If you got Tor as a static binary with OpenSSL included, then you should know:
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@ -60,4 +60,7 @@ ed25519/ref10/*
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Daniel Bernsten's portable ref10 implementation of ed25519.
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Public domain.
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readpassphrase.[ch]
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Portable readpassphrase implementation from OpenSSH portable, version
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6.8p1.
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@ -7,6 +7,7 @@ EXTHEADERS = \
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src/ext/ht.h \
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src/ext/eventdns.h \
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src/ext/tinytest.h \
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src/ext/readpassphrase.h \
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src/ext/strlcat.c \
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src/ext/strlcpy.c \
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src/ext/tinytest_macros.h \
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@ -0,0 +1,213 @@
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/* $OpenBSD: readpassphrase.c,v 1.22 2010/01/13 10:20:54 dtucker Exp $ */
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/*
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* Copyright (c) 2000-2002, 2007 Todd C. Miller <Todd.Miller@courtesan.com>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* Sponsored in part by the Defense Advanced Research Projects
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* Agency (DARPA) and Air Force Research Laboratory, Air Force
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* Materiel Command, USAF, under agreement number F39502-99-1-0512.
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*/
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/* OPENBSD ORIGINAL: lib/libc/gen/readpassphrase.c */
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#include "includes.h"
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#ifndef HAVE_READPASSPHRASE
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#include <termios.h>
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#include <signal.h>
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#include <ctype.h>
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#include <fcntl.h>
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#include <readpassphrase.h>
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#include <errno.h>
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#include <string.h>
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#include <unistd.h>
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#ifdef TCSASOFT
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# define _T_FLUSH (TCSAFLUSH|TCSASOFT)
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#else
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# define _T_FLUSH (TCSAFLUSH)
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#endif
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/* SunOS 4.x which lacks _POSIX_VDISABLE, but has VDISABLE */
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#if !defined(_POSIX_VDISABLE) && defined(VDISABLE)
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# define _POSIX_VDISABLE VDISABLE
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#endif
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#ifndef _NSIG
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# ifdef NSIG
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# define _NSIG NSIG
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# else
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# define _NSIG 128
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# endif
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#endif
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static volatile sig_atomic_t signo[_NSIG];
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static void handler(int);
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char *
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readpassphrase(const char *prompt, char *buf, size_t bufsiz, int flags)
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{
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ssize_t nr;
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int input, output, save_errno, i, need_restart;
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char ch, *p, *end;
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struct termios term, oterm;
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struct sigaction sa, savealrm, saveint, savehup, savequit, saveterm;
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struct sigaction savetstp, savettin, savettou, savepipe;
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/* I suppose we could alloc on demand in this case (XXX). */
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if (bufsiz == 0) {
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errno = EINVAL;
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return(NULL);
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}
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restart:
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for (i = 0; i < _NSIG; i++)
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signo[i] = 0;
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nr = -1;
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save_errno = 0;
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need_restart = 0;
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/*
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* Read and write to /dev/tty if available. If not, read from
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* stdin and write to stderr unless a tty is required.
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*/
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if ((flags & RPP_STDIN) ||
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(input = output = open(_PATH_TTY, O_RDWR)) == -1) {
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if (flags & RPP_REQUIRE_TTY) {
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errno = ENOTTY;
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return(NULL);
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}
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input = STDIN_FILENO;
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output = STDERR_FILENO;
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}
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/*
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* Catch signals that would otherwise cause the user to end
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* up with echo turned off in the shell. Don't worry about
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* things like SIGXCPU and SIGVTALRM for now.
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*/
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sigemptyset(&sa.sa_mask);
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sa.sa_flags = 0; /* don't restart system calls */
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sa.sa_handler = handler;
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(void)sigaction(SIGALRM, &sa, &savealrm);
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(void)sigaction(SIGHUP, &sa, &savehup);
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(void)sigaction(SIGINT, &sa, &saveint);
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(void)sigaction(SIGPIPE, &sa, &savepipe);
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(void)sigaction(SIGQUIT, &sa, &savequit);
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(void)sigaction(SIGTERM, &sa, &saveterm);
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(void)sigaction(SIGTSTP, &sa, &savetstp);
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(void)sigaction(SIGTTIN, &sa, &savettin);
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(void)sigaction(SIGTTOU, &sa, &savettou);
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/* Turn off echo if possible. */
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if (input != STDIN_FILENO && tcgetattr(input, &oterm) == 0) {
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memcpy(&term, &oterm, sizeof(term));
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if (!(flags & RPP_ECHO_ON))
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term.c_lflag &= ~(ECHO | ECHONL);
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#ifdef VSTATUS
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if (term.c_cc[VSTATUS] != _POSIX_VDISABLE)
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term.c_cc[VSTATUS] = _POSIX_VDISABLE;
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#endif
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(void)tcsetattr(input, _T_FLUSH, &term);
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} else {
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memset(&term, 0, sizeof(term));
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term.c_lflag |= ECHO;
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memset(&oterm, 0, sizeof(oterm));
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oterm.c_lflag |= ECHO;
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}
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/* No I/O if we are already backgrounded. */
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if (signo[SIGTTOU] != 1 && signo[SIGTTIN] != 1) {
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if (!(flags & RPP_STDIN))
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(void)write(output, prompt, strlen(prompt));
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end = buf + bufsiz - 1;
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p = buf;
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while ((nr = read(input, &ch, 1)) == 1 && ch != '\n' && ch != '\r') {
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if (p < end) {
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if ((flags & RPP_SEVENBIT))
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ch &= 0x7f;
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if (isalpha(ch)) {
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if ((flags & RPP_FORCELOWER))
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ch = (char)tolower(ch);
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if ((flags & RPP_FORCEUPPER))
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ch = (char)toupper(ch);
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}
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*p++ = ch;
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}
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}
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*p = '\0';
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save_errno = errno;
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if (!(term.c_lflag & ECHO))
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(void)write(output, "\n", 1);
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}
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/* Restore old terminal settings and signals. */
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if (memcmp(&term, &oterm, sizeof(term)) != 0) {
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while (tcsetattr(input, _T_FLUSH, &oterm) == -1 &&
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errno == EINTR)
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continue;
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}
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(void)sigaction(SIGALRM, &savealrm, NULL);
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(void)sigaction(SIGHUP, &savehup, NULL);
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(void)sigaction(SIGINT, &saveint, NULL);
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(void)sigaction(SIGQUIT, &savequit, NULL);
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(void)sigaction(SIGPIPE, &savepipe, NULL);
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(void)sigaction(SIGTERM, &saveterm, NULL);
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(void)sigaction(SIGTSTP, &savetstp, NULL);
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(void)sigaction(SIGTTIN, &savettin, NULL);
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(void)sigaction(SIGTTOU, &savettou, NULL);
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if (input != STDIN_FILENO)
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(void)close(input);
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/*
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* If we were interrupted by a signal, resend it to ourselves
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* now that we have restored the signal handlers.
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*/
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for (i = 0; i < _NSIG; i++) {
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if (signo[i]) {
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kill(getpid(), i);
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switch (i) {
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case SIGTSTP:
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case SIGTTIN:
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case SIGTTOU:
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need_restart = 1;
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}
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}
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}
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if (need_restart)
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goto restart;
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if (save_errno)
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errno = save_errno;
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return(nr == -1 ? NULL : buf);
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}
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#if 0
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char *
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getpass(const char *prompt)
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{
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static char buf[_PASSWORD_LEN + 1];
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return(readpassphrase(prompt, buf, sizeof(buf), RPP_ECHO_OFF));
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}
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#endif
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static void handler(int s)
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{
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signo[s] = 1;
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}
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#endif /* HAVE_READPASSPHRASE */
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@ -0,0 +1,44 @@
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/* $OpenBSD: readpassphrase.h,v 1.5 2003/06/17 21:56:23 millert Exp $ */
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/*
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* Copyright (c) 2000, 2002 Todd C. Miller <Todd.Miller@courtesan.com>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* Sponsored in part by the Defense Advanced Research Projects
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* Agency (DARPA) and Air Force Research Laboratory, Air Force
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* Materiel Command, USAF, under agreement number F39502-99-1-0512.
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*/
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/* OPENBSD ORIGINAL: include/readpassphrase.h */
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#ifndef _READPASSPHRASE_H_
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#define _READPASSPHRASE_H_
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#include "includes.h"
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#ifndef HAVE_READPASSPHRASE
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#define RPP_ECHO_OFF 0x00 /* Turn off echo (default). */
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#define RPP_ECHO_ON 0x01 /* Leave echo on. */
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#define RPP_REQUIRE_TTY 0x02 /* Fail if there is no tty. */
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#define RPP_FORCELOWER 0x04 /* Force input to lower case. */
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#define RPP_FORCEUPPER 0x08 /* Force input to upper case. */
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#define RPP_SEVENBIT 0x10 /* Strip the high bit from input. */
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#define RPP_STDIN 0x20 /* Read from stdin, not /dev/tty */
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char * readpassphrase(const char *, char *, size_t, int);
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#endif /* HAVE_READPASSPHRASE */
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#endif /* !_READPASSPHRASE_H_ */
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