1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
|
/*
* Copyright (c) 2000 Todd C. Miller <Todd.Miller@courtesan.com>
* 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.
* 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.
*
* 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.
*/
#if defined(LIBC_SCCS) && !defined(lint)
static char rcsid[] = "$OpenBSD: readpassphrase.c,v 1.4 2001/06/18 17:41:39 millert Exp $";
#endif /* LIBC_SCCS and not lint */
#include "includes.h"
#ifndef HAVE_READPASSPHRASE
#include <termios.h>
#include <readpassphrase.h>
#ifdef TCSASOFT
# define _T_FLUSH (TCSAFLUSH|TCSASOFT)
#else
# define _T_FLUSH (TCSAFLUSH)
#endif
char *
readpassphrase(prompt, buf, bufsiz, flags)
const char *prompt;
char *buf;
size_t bufsiz;
int flags;
{
struct termios term;
char ch, *p, *end;
u_char status;
int echo, input, output;
sigset_t oset, nset;
/* I suppose we could alloc on demand in this case (XXX). */
if (bufsiz == 0) {
errno = EINVAL;
return(NULL);
}
/*
* 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 = STDIN_FILENO;
output = STDERR_FILENO;
}
/*
* We block SIGINT and SIGTSTP so the terminal is not left
* in an inconsistent state (ie: no echo). It would probably
* be better to simply catch these though.
*/
sigemptyset(&nset);
sigaddset(&nset, SIGINT);
sigaddset(&nset, SIGTSTP);
(void)sigprocmask(SIG_BLOCK, &nset, &oset);
/* Turn off echo if possible. */
echo = 0;
status = _POSIX_VDISABLE;
if (tcgetattr(input, &term) == 0) {
if (!(flags & RPP_ECHO_ON) && (term.c_lflag & ECHO)) {
echo = 1;
term.c_lflag &= ~ECHO;
}
#ifdef VSTATUS
if (term.c_cc[VSTATUS] != _POSIX_VDISABLE) {
status = term.c_cc[VSTATUS];
term.c_cc[VSTATUS] = _POSIX_VDISABLE;
}
#endif
(void)tcsetattr(input, _T_FLUSH, &term);
}
if (!(flags & RPP_ECHO_ON)) {
if (tcgetattr(input, &term) == 0 && (term.c_lflag & ECHO)) {
echo = 1;
term.c_lflag &= ~ECHO;
(void)tcsetattr(input, _T_FLUSH, &term);
}
}
(void)write(output, prompt, strlen(prompt));
end = buf + bufsiz - 1;
for (p = buf; read(input, &ch, 1) == 1 && ch != '\n' && ch != '\r';) {
if (p < end) {
if ((flags & RPP_SEVENBIT))
ch = ch &= 0x7f;
if (isalpha(ch)) {
if ((flags & RPP_FORCELOWER))
ch = tolower(ch);
if ((flags & RPP_FORCEUPPER))
ch = toupper(ch);
}
*p++ = ch;
}
}
*p = '\0';
if (echo || status != _POSIX_VDISABLE) {
if (echo) {
(void)write(output, "\n", 1);
term.c_lflag |= ECHO;
}
#ifdef VSTATUS
if (status != _POSIX_VDISABLE)
term.c_cc[VSTATUS] = status;
#endif
(void)tcsetattr(input, _T_FLUSH, &term);
}
(void)sigprocmask(SIG_SETMASK, &oset, NULL);
if (input != STDIN_FILENO)
(void)close(input);
return(buf);
}
#endif /* HAVE_READPASSPHRASE */
#if 0
char *
getpass(prompt)
const char *prompt;
{
static char buf[_PASSWORD_LEN + 1];
return(readpassphrase(prompt, buf, sizeof(buf), RPP_ECHO_OFF));
}
#endif
|
