1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22 /*
23 * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 /* Copyright (c) 1988 AT&T */
28 /* All Rights Reserved */
29
30 #pragma weak _getpass = getpass
31 #pragma weak _getpassphrase = getpassphrase
32
33 #include "lint.h"
34 #include "file64.h"
35 #include "mtlib.h"
36 #include <stdio.h>
37 #include <sys/types.h>
38 #include <signal.h>
39 #include <unistd.h>
40 #include <stropts.h>
41 #include <termio.h>
42 #include <thread.h>
43 #include <synch.h>
44 #include "libc.h"
45 #include "stdiom.h"
46 #include "tsd.h"
47
48 static int intrupt;
49 static char *__getpass(const char *, int);
50
51 #define MAXPASSWD 256 /* max significant characters in password */
52 #define SMLPASSWD 8 /* unix standard characters in password */
53
54
55 char *
getpass(const char * prompt)56 getpass(const char *prompt)
57 {
58 return ((char *)__getpass(prompt, SMLPASSWD));
59 }
60
61 char *
getpassphrase(const char * prompt)62 getpassphrase(const char *prompt)
63 {
64 return ((char *)__getpass(prompt, MAXPASSWD));
65 }
66
67 static void catch(int);
68
69 static char *
__getpass(const char * prompt,int size)70 __getpass(const char *prompt, int size)
71 {
72 struct termio ttyb;
73 unsigned short flags;
74 char *p;
75 int c;
76 FILE *fi;
77 char *pbuf = tsdalloc(_T_GETPASS, MAXPASSWD + 1, NULL);
78 struct sigaction act, osigint, osigtstp;
79
80 if (pbuf == NULL ||
81 (fi = fopen("/dev/tty", "r+F")) == NULL)
82 return (NULL);
83 setbuf(fi, NULL);
84
85 intrupt = 0;
86 act.sa_flags = 0;
87 act.sa_handler = catch;
88 (void) sigemptyset(&act.sa_mask);
89 (void) sigaction(SIGINT, &act, &osigint); /* trap interrupt */
90 act.sa_handler = SIG_IGN;
91 (void) sigaction(SIGTSTP, &act, &osigtstp); /* ignore stop */
92 (void) ioctl(fileno(fi), TCGETA, &ttyb);
93 flags = ttyb.c_lflag;
94 ttyb.c_lflag &= ~(ECHO | ECHOE | ECHOK | ECHONL);
95 (void) ioctl(fileno(fi), TCSETAF, &ttyb);
96
97 (void) fputs(prompt, fi);
98 p = pbuf;
99 while (!intrupt &&
100 (c = GETC(fi)) != '\n' && c != '\r' && c != EOF) {
101 if (p < &pbuf[ size ])
102 *p++ = (char)c;
103 }
104 *p = '\0';
105 (void) PUTC('\n', fi);
106
107 ttyb.c_lflag = flags;
108 (void) ioctl(fileno(fi), TCSETAW, &ttyb);
109 (void) sigaction(SIGINT, &osigint, NULL);
110 (void) sigaction(SIGTSTP, &osigtstp, NULL);
111 (void) fclose(fi);
112 if (intrupt) { /* if interrupted erase the input */
113 pbuf[0] = '\0';
114 (void) kill(getpid(), SIGINT);
115 }
116 return (pbuf);
117 }
118
119 static void
catch(int x __unused)120 catch(int x __unused)
121 {
122 intrupt = 1;
123 }
124