diff options
author | nicoo <nicoo@debian.org> | 2020-02-12 13:42:22 +0100 |
---|---|---|
committer | Nicolas Braud-Santoni <nicolas@braud-santoni.eu> | 2020-02-12 13:42:22 +0100 |
commit | c79050aa44b8836d836c5dd22a383a073c28b74b (patch) | |
tree | 7bcca9fabd7718bf87ca600a6594f57b76d8de7d /openbsd-compat/readpassphrase.c |
Import upstream release 1.3.0
Closes: #951184
Diffstat (limited to 'openbsd-compat/readpassphrase.c')
-rw-r--r-- | openbsd-compat/readpassphrase.c | 214 |
1 files changed, 214 insertions, 0 deletions
diff --git a/openbsd-compat/readpassphrase.c b/openbsd-compat/readpassphrase.c new file mode 100644 index 0000000..dfb3065 --- /dev/null +++ b/openbsd-compat/readpassphrase.c | |||
@@ -0,0 +1,214 @@ | |||
1 | /* $OpenBSD: readpassphrase.c,v 1.26 2016/10/18 12:47:18 millert Exp $ */ | ||
2 | |||
3 | /* | ||
4 | * Copyright (c) 2000-2002, 2007, 2010 | ||
5 | * Todd C. Miller <Todd.Miller@courtesan.com> | ||
6 | * | ||
7 | * Permission to use, copy, modify, and distribute this software for any | ||
8 | * purpose with or without fee is hereby granted, provided that the above | ||
9 | * copyright notice and this permission notice appear in all copies. | ||
10 | * | ||
11 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | ||
12 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | ||
13 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR | ||
14 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | ||
15 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | ||
16 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | ||
17 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | ||
18 | * | ||
19 | * Sponsored in part by the Defense Advanced Research Projects | ||
20 | * Agency (DARPA) and Air Force Research Laboratory, Air Force | ||
21 | * Materiel Command, USAF, under agreement number F39502-99-1-0512. | ||
22 | */ | ||
23 | |||
24 | /* OPENBSD ORIGINAL: lib/libc/gen/readpassphrase.c */ | ||
25 | |||
26 | #include "openbsd-compat.h" | ||
27 | |||
28 | #ifndef HAVE_READPASSPHRASE | ||
29 | |||
30 | #include <termios.h> | ||
31 | #include <signal.h> | ||
32 | #include <ctype.h> | ||
33 | #include <fcntl.h> | ||
34 | #include <errno.h> | ||
35 | #include <string.h> | ||
36 | #ifdef HAVE_UNISTD_H | ||
37 | #include <unistd.h> | ||
38 | #endif | ||
39 | #include <paths.h> | ||
40 | |||
41 | #ifndef _PATH_TTY | ||
42 | # define _PATH_TTY "/dev/tty" | ||
43 | #endif | ||
44 | |||
45 | #ifndef TCSASOFT | ||
46 | /* If we don't have TCSASOFT define it so that ORing it it below is a no-op. */ | ||
47 | # define TCSASOFT 0 | ||
48 | #endif | ||
49 | |||
50 | /* SunOS 4.x which lacks _POSIX_VDISABLE, but has VDISABLE */ | ||
51 | #if !defined(_POSIX_VDISABLE) && defined(VDISABLE) | ||
52 | # define _POSIX_VDISABLE VDISABLE | ||
53 | #endif | ||
54 | |||
55 | static volatile sig_atomic_t signo[_NSIG]; | ||
56 | |||
57 | static void handler(int); | ||
58 | |||
59 | char * | ||
60 | readpassphrase(const char *prompt, char *buf, size_t bufsiz, int flags) | ||
61 | { | ||
62 | ssize_t nr; | ||
63 | int input, output, save_errno, i, need_restart; | ||
64 | char ch, *p, *end; | ||
65 | struct termios term, oterm; | ||
66 | struct sigaction sa, savealrm, saveint, savehup, savequit, saveterm; | ||
67 | struct sigaction savetstp, savettin, savettou, savepipe; | ||
68 | |||
69 | /* I suppose we could alloc on demand in this case (XXX). */ | ||
70 | if (bufsiz == 0) { | ||
71 | errno = EINVAL; | ||
72 | return(NULL); | ||
73 | } | ||
74 | |||
75 | restart: | ||
76 | for (i = 0; i < _NSIG; i++) | ||
77 | signo[i] = 0; | ||
78 | need_restart = 0; | ||
79 | /* | ||
80 | * Read and write to /dev/tty if available. If not, read from | ||
81 | * stdin and write to stderr unless a tty is required. | ||
82 | */ | ||
83 | if ((flags & RPP_STDIN) || | ||
84 | (input = output = open(_PATH_TTY, O_RDWR)) == -1) { | ||
85 | if (flags & RPP_REQUIRE_TTY) { | ||
86 | errno = ENOTTY; | ||
87 | return(NULL); | ||
88 | } | ||
89 | input = STDIN_FILENO; | ||
90 | output = STDERR_FILENO; | ||
91 | } | ||
92 | |||
93 | /* | ||
94 | * Turn off echo if possible. | ||
95 | * If we are using a tty but are not the foreground pgrp this will | ||
96 | * generate SIGTTOU, so do it *before* installing the signal handlers. | ||
97 | */ | ||
98 | if (input != STDIN_FILENO && tcgetattr(input, &oterm) == 0) { | ||
99 | memcpy(&term, &oterm, sizeof(term)); | ||
100 | if (!(flags & RPP_ECHO_ON)) | ||
101 | term.c_lflag &= ~(ECHO | ECHONL); | ||
102 | #ifdef VSTATUS | ||
103 | if (term.c_cc[VSTATUS] != _POSIX_VDISABLE) | ||
104 | term.c_cc[VSTATUS] = _POSIX_VDISABLE; | ||
105 | #endif | ||
106 | (void)tcsetattr(input, TCSAFLUSH|TCSASOFT, &term); | ||
107 | } else { | ||
108 | memset(&term, 0, sizeof(term)); | ||
109 | term.c_lflag |= ECHO; | ||
110 | memset(&oterm, 0, sizeof(oterm)); | ||
111 | oterm.c_lflag |= ECHO; | ||
112 | } | ||
113 | |||
114 | /* | ||
115 | * Catch signals that would otherwise cause the user to end | ||
116 | * up with echo turned off in the shell. Don't worry about | ||
117 | * things like SIGXCPU and SIGVTALRM for now. | ||
118 | */ | ||
119 | sigemptyset(&sa.sa_mask); | ||
120 | sa.sa_flags = 0; /* don't restart system calls */ | ||
121 | sa.sa_handler = handler; | ||
122 | (void)sigaction(SIGALRM, &sa, &savealrm); | ||
123 | (void)sigaction(SIGHUP, &sa, &savehup); | ||
124 | (void)sigaction(SIGINT, &sa, &saveint); | ||
125 | (void)sigaction(SIGPIPE, &sa, &savepipe); | ||
126 | (void)sigaction(SIGQUIT, &sa, &savequit); | ||
127 | (void)sigaction(SIGTERM, &sa, &saveterm); | ||
128 | (void)sigaction(SIGTSTP, &sa, &savetstp); | ||
129 | (void)sigaction(SIGTTIN, &sa, &savettin); | ||
130 | (void)sigaction(SIGTTOU, &sa, &savettou); | ||
131 | |||
132 | if (!(flags & RPP_STDIN)) | ||
133 | (void)write(output, prompt, strlen(prompt)); | ||
134 | end = buf + bufsiz - 1; | ||
135 | p = buf; | ||
136 | while ((nr = read(input, &ch, 1)) == 1 && ch != '\n' && ch != '\r') { | ||
137 | if (p < end) { | ||
138 | if ((flags & RPP_SEVENBIT)) | ||
139 | ch &= 0x7f; | ||
140 | if (isalpha((unsigned char)ch)) { | ||
141 | if ((flags & RPP_FORCELOWER)) | ||
142 | ch = (char)tolower((unsigned char)ch); | ||
143 | if ((flags & RPP_FORCEUPPER)) | ||
144 | ch = (char)toupper((unsigned char)ch); | ||
145 | } | ||
146 | *p++ = ch; | ||
147 | } | ||
148 | } | ||
149 | *p = '\0'; | ||
150 | save_errno = errno; | ||
151 | if (!(term.c_lflag & ECHO)) | ||
152 | (void)write(output, "\n", 1); | ||
153 | |||
154 | /* Restore old terminal settings and signals. */ | ||
155 | if (memcmp(&term, &oterm, sizeof(term)) != 0) { | ||
156 | const int sigttou = signo[SIGTTOU]; | ||
157 | |||
158 | /* Ignore SIGTTOU generated when we are not the fg pgrp. */ | ||
159 | while (tcsetattr(input, TCSAFLUSH|TCSASOFT, &oterm) == -1 && | ||
160 | errno == EINTR && !signo[SIGTTOU]) | ||
161 | continue; | ||
162 | signo[SIGTTOU] = sigttou; | ||
163 | } | ||
164 | (void)sigaction(SIGALRM, &savealrm, NULL); | ||
165 | (void)sigaction(SIGHUP, &savehup, NULL); | ||
166 | (void)sigaction(SIGINT, &saveint, NULL); | ||
167 | (void)sigaction(SIGQUIT, &savequit, NULL); | ||
168 | (void)sigaction(SIGPIPE, &savepipe, NULL); | ||
169 | (void)sigaction(SIGTERM, &saveterm, NULL); | ||
170 | (void)sigaction(SIGTSTP, &savetstp, NULL); | ||
171 | (void)sigaction(SIGTTIN, &savettin, NULL); | ||
172 | (void)sigaction(SIGTTOU, &savettou, NULL); | ||
173 | if (input != STDIN_FILENO) | ||
174 | (void)close(input); | ||
175 | |||
176 | /* | ||
177 | * If we were interrupted by a signal, resend it to ourselves | ||
178 | * now that we have restored the signal handlers. | ||
179 | */ | ||
180 | for (i = 0; i < _NSIG; i++) { | ||
181 | if (signo[i]) { | ||
182 | kill(getpid(), i); | ||
183 | switch (i) { | ||
184 | case SIGTSTP: | ||
185 | case SIGTTIN: | ||
186 | case SIGTTOU: | ||
187 | need_restart = 1; | ||
188 | } | ||
189 | } | ||
190 | } | ||
191 | if (need_restart) | ||
192 | goto restart; | ||
193 | |||
194 | if (save_errno) | ||
195 | errno = save_errno; | ||
196 | return(nr == -1 ? NULL : buf); | ||
197 | } | ||
198 | |||
199 | #if 0 | ||
200 | char * | ||
201 | getpass(const char *prompt) | ||
202 | { | ||
203 | static char buf[_PASSWORD_LEN + 1]; | ||
204 | |||
205 | return(readpassphrase(prompt, buf, sizeof(buf), RPP_ECHO_OFF)); | ||
206 | } | ||
207 | #endif | ||
208 | |||
209 | static void handler(int s) | ||
210 | { | ||
211 | |||
212 | signo[s] = 1; | ||
213 | } | ||
214 | #endif /* HAVE_READPASSPHRASE */ | ||