1/* $OpenBSD: readpassphrase.c,v 1.18 2005/08/08 08:05:34 espie Exp $ */
| 1/* $OpenBSD: readpassphrase.c,v 1.22 2010/01/13 10:20:54 dtucker Exp $ */
|
2
3/*
| 2
3/*
|
4 * Copyright (c) 2000-2002 Todd C. Miller
| 4 * Copyright (c) 2000-2002, 2007 Todd C. Miller <Todd.Miller@courtesan.com>
|
5 *
6 * Permission to use, copy, modify, and distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
9 *
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 *
18 * Sponsored in part by the Defense Advanced Research Projects
19 * Agency (DARPA) and Air Force Research Laboratory, Air Force
20 * Materiel Command, USAF, under agreement number F39502-99-1-0512.
21 */
22
23/* OPENBSD ORIGINAL: lib/libc/gen/readpassphrase.c */
24
25#include "includes.h"
26
27#ifndef HAVE_READPASSPHRASE
28
29#include <termios.h>
30#include <signal.h>
31#include <ctype.h>
32#include <fcntl.h>
33#include <readpassphrase.h>
34#include <errno.h>
35#include <string.h>
36#include <unistd.h>
37
38#ifdef TCSASOFT
39# define _T_FLUSH (TCSAFLUSH|TCSASOFT)
40#else
41# define _T_FLUSH (TCSAFLUSH)
42#endif
43
44/* SunOS 4.x which lacks _POSIX_VDISABLE, but has VDISABLE */
45#if !defined(_POSIX_VDISABLE) && defined(VDISABLE)
46# define _POSIX_VDISABLE VDISABLE
47#endif
48
| 5 *
6 * Permission to use, copy, modify, and distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
9 *
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 *
18 * Sponsored in part by the Defense Advanced Research Projects
19 * Agency (DARPA) and Air Force Research Laboratory, Air Force
20 * Materiel Command, USAF, under agreement number F39502-99-1-0512.
21 */
22
23/* OPENBSD ORIGINAL: lib/libc/gen/readpassphrase.c */
24
25#include "includes.h"
26
27#ifndef HAVE_READPASSPHRASE
28
29#include <termios.h>
30#include <signal.h>
31#include <ctype.h>
32#include <fcntl.h>
33#include <readpassphrase.h>
34#include <errno.h>
35#include <string.h>
36#include <unistd.h>
37
38#ifdef TCSASOFT
39# define _T_FLUSH (TCSAFLUSH|TCSASOFT)
40#else
41# define _T_FLUSH (TCSAFLUSH)
42#endif
43
44/* SunOS 4.x which lacks _POSIX_VDISABLE, but has VDISABLE */
45#if !defined(_POSIX_VDISABLE) && defined(VDISABLE)
46# define _POSIX_VDISABLE VDISABLE
47#endif
48
|
49static volatile sig_atomic_t signo;
| 49static volatile sig_atomic_t signo[_NSIG];
|
50
51static void handler(int);
52
53char *
54readpassphrase(const char *prompt, char *buf, size_t bufsiz, int flags)
55{
56 ssize_t nr;
| 50
51static void handler(int);
52
53char *
54readpassphrase(const char *prompt, char *buf, size_t bufsiz, int flags)
55{
56 ssize_t nr;
|
57 int input, output, save_errno;
| 57 int input, output, save_errno, i, need_restart;
|
58 char ch, *p, *end;
59 struct termios term, oterm;
60 struct sigaction sa, savealrm, saveint, savehup, savequit, saveterm;
61 struct sigaction savetstp, savettin, savettou, savepipe;
62
63 /* I suppose we could alloc on demand in this case (XXX). */
64 if (bufsiz == 0) {
65 errno = EINVAL;
66 return(NULL);
67 }
68
69restart:
| 58 char ch, *p, *end;
59 struct termios term, oterm;
60 struct sigaction sa, savealrm, saveint, savehup, savequit, saveterm;
61 struct sigaction savetstp, savettin, savettou, savepipe;
62
63 /* I suppose we could alloc on demand in this case (XXX). */
64 if (bufsiz == 0) {
65 errno = EINVAL;
66 return(NULL);
67 }
68
69restart:
|
70 signo = 0;
| 70 for (i = 0; i < _NSIG; i++)
71 signo[i] = 0;
72 nr = -1;
73 save_errno = 0;
74 need_restart = 0;
|
71 /*
72 * Read and write to /dev/tty if available. If not, read from
73 * stdin and write to stderr unless a tty is required.
74 */
75 if ((flags & RPP_STDIN) ||
76 (input = output = open(_PATH_TTY, O_RDWR)) == -1) {
77 if (flags & RPP_REQUIRE_TTY) {
78 errno = ENOTTY;
79 return(NULL);
80 }
81 input = STDIN_FILENO;
82 output = STDERR_FILENO;
83 }
84
85 /*
86 * Catch signals that would otherwise cause the user to end
87 * up with echo turned off in the shell. Don't worry about
88 * things like SIGXCPU and SIGVTALRM for now.
89 */
90 sigemptyset(&sa.sa_mask);
91 sa.sa_flags = 0; /* don't restart system calls */
92 sa.sa_handler = handler;
93 (void)sigaction(SIGALRM, &sa, &savealrm);
94 (void)sigaction(SIGHUP, &sa, &savehup);
95 (void)sigaction(SIGINT, &sa, &saveint);
96 (void)sigaction(SIGPIPE, &sa, &savepipe);
97 (void)sigaction(SIGQUIT, &sa, &savequit);
98 (void)sigaction(SIGTERM, &sa, &saveterm);
99 (void)sigaction(SIGTSTP, &sa, &savetstp);
100 (void)sigaction(SIGTTIN, &sa, &savettin);
101 (void)sigaction(SIGTTOU, &sa, &savettou);
102
103 /* Turn off echo if possible. */
104 if (input != STDIN_FILENO && tcgetattr(input, &oterm) == 0) {
105 memcpy(&term, &oterm, sizeof(term));
106 if (!(flags & RPP_ECHO_ON))
107 term.c_lflag &= ~(ECHO | ECHONL);
108#ifdef VSTATUS
109 if (term.c_cc[VSTATUS] != _POSIX_VDISABLE)
110 term.c_cc[VSTATUS] = _POSIX_VDISABLE;
111#endif
112 (void)tcsetattr(input, _T_FLUSH, &term);
113 } else {
114 memset(&term, 0, sizeof(term));
115 term.c_lflag |= ECHO;
116 memset(&oterm, 0, sizeof(oterm));
117 oterm.c_lflag |= ECHO;
118 }
119
| 75 /*
76 * Read and write to /dev/tty if available. If not, read from
77 * stdin and write to stderr unless a tty is required.
78 */
79 if ((flags & RPP_STDIN) ||
80 (input = output = open(_PATH_TTY, O_RDWR)) == -1) {
81 if (flags & RPP_REQUIRE_TTY) {
82 errno = ENOTTY;
83 return(NULL);
84 }
85 input = STDIN_FILENO;
86 output = STDERR_FILENO;
87 }
88
89 /*
90 * Catch signals that would otherwise cause the user to end
91 * up with echo turned off in the shell. Don't worry about
92 * things like SIGXCPU and SIGVTALRM for now.
93 */
94 sigemptyset(&sa.sa_mask);
95 sa.sa_flags = 0; /* don't restart system calls */
96 sa.sa_handler = handler;
97 (void)sigaction(SIGALRM, &sa, &savealrm);
98 (void)sigaction(SIGHUP, &sa, &savehup);
99 (void)sigaction(SIGINT, &sa, &saveint);
100 (void)sigaction(SIGPIPE, &sa, &savepipe);
101 (void)sigaction(SIGQUIT, &sa, &savequit);
102 (void)sigaction(SIGTERM, &sa, &saveterm);
103 (void)sigaction(SIGTSTP, &sa, &savetstp);
104 (void)sigaction(SIGTTIN, &sa, &savettin);
105 (void)sigaction(SIGTTOU, &sa, &savettou);
106
107 /* Turn off echo if possible. */
108 if (input != STDIN_FILENO && tcgetattr(input, &oterm) == 0) {
109 memcpy(&term, &oterm, sizeof(term));
110 if (!(flags & RPP_ECHO_ON))
111 term.c_lflag &= ~(ECHO | ECHONL);
112#ifdef VSTATUS
113 if (term.c_cc[VSTATUS] != _POSIX_VDISABLE)
114 term.c_cc[VSTATUS] = _POSIX_VDISABLE;
115#endif
116 (void)tcsetattr(input, _T_FLUSH, &term);
117 } else {
118 memset(&term, 0, sizeof(term));
119 term.c_lflag |= ECHO;
120 memset(&oterm, 0, sizeof(oterm));
121 oterm.c_lflag |= ECHO;
122 }
123
|
120 if (!(flags & RPP_STDIN))
121 (void)write(output, prompt, strlen(prompt));
122 end = buf + bufsiz - 1;
123 for (p = buf; (nr = read(input, &ch, 1)) == 1 && ch != '\n' && ch != '\r';) {
124 if (p < end) {
125 if ((flags & RPP_SEVENBIT))
126 ch &= 0x7f;
127 if (isalpha(ch)) {
128 if ((flags & RPP_FORCELOWER))
129 ch = tolower(ch);
130 if ((flags & RPP_FORCEUPPER))
131 ch = toupper(ch);
| 124 /* No I/O if we are already backgrounded. */
125 if (signo[SIGTTOU] != 1 && signo[SIGTTIN] != 1) {
126 if (!(flags & RPP_STDIN))
127 (void)write(output, prompt, strlen(prompt));
128 end = buf + bufsiz - 1;
129 p = buf;
130 while ((nr = read(input, &ch, 1)) == 1 && ch != '\n' && ch != '\r') {
131 if (p < end) {
132 if ((flags & RPP_SEVENBIT))
133 ch &= 0x7f;
134 if (isalpha(ch)) {
135 if ((flags & RPP_FORCELOWER))
136 ch = (char)tolower(ch);
137 if ((flags & RPP_FORCEUPPER))
138 ch = (char)toupper(ch);
139 }
140 *p++ = ch;
|
132 }
| 141 }
|
133 *p++ = ch;
| |
134 }
| 142 }
|
| 143 *p = '\0';
144 save_errno = errno;
145 if (!(term.c_lflag & ECHO))
146 (void)write(output, "\n", 1);
|
135 }
| 147 }
|
136 *p = '\0';
137 save_errno = errno;
138 if (!(term.c_lflag & ECHO))
139 (void)write(output, "\n", 1);
| |
140
141 /* Restore old terminal settings and signals. */
142 if (memcmp(&term, &oterm, sizeof(term)) != 0) {
143 while (tcsetattr(input, _T_FLUSH, &oterm) == -1 &&
144 errno == EINTR)
145 continue;
146 }
147 (void)sigaction(SIGALRM, &savealrm, NULL);
148 (void)sigaction(SIGHUP, &savehup, NULL);
149 (void)sigaction(SIGINT, &saveint, NULL);
150 (void)sigaction(SIGQUIT, &savequit, NULL);
151 (void)sigaction(SIGPIPE, &savepipe, NULL);
152 (void)sigaction(SIGTERM, &saveterm, NULL);
153 (void)sigaction(SIGTSTP, &savetstp, NULL);
154 (void)sigaction(SIGTTIN, &savettin, NULL);
| 148
149 /* Restore old terminal settings and signals. */
150 if (memcmp(&term, &oterm, sizeof(term)) != 0) {
151 while (tcsetattr(input, _T_FLUSH, &oterm) == -1 &&
152 errno == EINTR)
153 continue;
154 }
155 (void)sigaction(SIGALRM, &savealrm, NULL);
156 (void)sigaction(SIGHUP, &savehup, NULL);
157 (void)sigaction(SIGINT, &saveint, NULL);
158 (void)sigaction(SIGQUIT, &savequit, NULL);
159 (void)sigaction(SIGPIPE, &savepipe, NULL);
160 (void)sigaction(SIGTERM, &saveterm, NULL);
161 (void)sigaction(SIGTSTP, &savetstp, NULL);
162 (void)sigaction(SIGTTIN, &savettin, NULL);
|
| 163 (void)sigaction(SIGTTOU, &savettou, NULL);
|
155 if (input != STDIN_FILENO)
156 (void)close(input);
157
158 /*
159 * If we were interrupted by a signal, resend it to ourselves
160 * now that we have restored the signal handlers.
161 */
| 164 if (input != STDIN_FILENO)
165 (void)close(input);
166
167 /*
168 * If we were interrupted by a signal, resend it to ourselves
169 * now that we have restored the signal handlers.
170 */
|
162 if (signo) {
163 kill(getpid(), signo);
164 switch (signo) {
165 case SIGTSTP:
166 case SIGTTIN:
167 case SIGTTOU:
168 goto restart;
| 171 for (i = 0; i < _NSIG; i++) {
172 if (signo[i]) {
173 kill(getpid(), i);
174 switch (i) {
175 case SIGTSTP:
176 case SIGTTIN:
177 case SIGTTOU:
178 need_restart = 1;
179 }
|
169 }
170 }
| 180 }
181 }
|
| 182 if (need_restart)
183 goto restart;
|
171
| 184
|
172 errno = save_errno;
| 185 if (save_errno)
186 errno = save_errno;
|
173 return(nr == -1 ? NULL : buf);
174}
| 187 return(nr == -1 ? NULL : buf);
188}
|
175
| 189
|
176#if 0
177char *
178getpass(const char *prompt)
179{
180 static char buf[_PASSWORD_LEN + 1];
181
182 return(readpassphrase(prompt, buf, sizeof(buf), RPP_ECHO_OFF));
183}
184#endif
185
186static void handler(int s)
187{
188
| 190#if 0
191char *
192getpass(const char *prompt)
193{
194 static char buf[_PASSWORD_LEN + 1];
195
196 return(readpassphrase(prompt, buf, sizeof(buf), RPP_ECHO_OFF));
197}
198#endif
199
200static void handler(int s)
201{
202
|
189 signo = s;
| 203 signo[s] = 1;
|
190}
191#endif /* HAVE_READPASSPHRASE */
| 204}
205#endif /* HAVE_READPASSPHRASE */
|