1/*-
2 * Copyright (c) 1992, 1993
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of the University nor the names of its contributors
14 *    may be used to endorse or promote products derived from this software
15 *    without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30#include <sys/cdefs.h>
31
32__FBSDID("$FreeBSD: stable/11/contrib/telnet/libtelnet/read_password.c 351432 2019-08-23 17:40:47Z emaste $");
33
34#ifndef lint
35#if 0
36static char sccsid[] = "@(#)read_password.c	8.3 (Berkeley) 5/30/95";
37#endif
38#endif /* not lint */
39
40/*
41 * $Source: /mit/kerberos/src/lib/des/RCS/read_password.c,v $
42 * $Author: jon $
43 *
44 * Copyright 1985, 1986, 1987, 1988 by the Massachusetts Institute
45 * of Technology.
46 *
47 * For copying and distribution information, please see the file
48 * <mit-copyright.h>.
49 *
50 * This routine prints the supplied string to standard
51 * output as a prompt, and reads a password string without
52 * echoing.
53 */
54
55#if	defined(RSA_ENCPWD) || defined(KRB4_ENCPWD)
56
57#include <stdio.h>
58#include <strings.h>
59#include <sys/ioctl.h>
60#include <signal.h>
61#include <setjmp.h>
62
63static jmp_buf env;
64
65/*** Routines ****************************************************** */
66/*
67 * This version just returns the string, doesn't map to key.
68 *
69 * Returns 0 on success, non-zero on failure.
70 */
71
72int
73local_des_read_pw_string(s,max,prompt,verify)
74    char *s;
75    int	max;
76    char *prompt;
77    int	verify;
78{
79    int ok = 0;
80    char *ptr;
81
82    jmp_buf old_env;
83    struct sgttyb tty_state;
84    char key_string[BUFSIZ];
85
86    if (max > BUFSIZ) {
87	return -1;
88    }
89
90    /* XXX assume jmp_buf is typedef'ed to an array */
91    memmove((char *)env, (char *)old_env, sizeof(env));
92    if (setjmp(env))
93	goto lose;
94
95    /* save terminal state*/
96    if (ioctl(0,TIOCGETP,(char *)&tty_state) == -1)
97	return -1;
98/*
99    push_signals();
100*/
101    /* Turn off echo */
102    tty_state.sg_flags &= ~ECHO;
103    if (ioctl(0,TIOCSETP,(char *)&tty_state) == -1)
104	return -1;
105    while (!ok) {
106	(void) printf("%s", prompt);
107	(void) fflush(stdout);
108	while (!fgets(s, max, stdin));
109
110	if ((ptr = strchr(s, '\n')))
111	    *ptr = '\0';
112	if (verify) {
113	    printf("\nVerifying, please re-enter %s",prompt);
114	    (void) fflush(stdout);
115	    if (!fgets(key_string, sizeof(key_string), stdin)) {
116		clearerr(stdin);
117		continue;
118	    }
119	    if ((ptr = strchr(key_string, '\n')))
120	    *ptr = '\0';
121	    if (strcmp(s,key_string)) {
122		printf("\n\07\07Mismatch - try again\n");
123		(void) fflush(stdout);
124		continue;
125	    }
126	}
127	ok = 1;
128    }
129
130lose:
131    if (!ok)
132	memset(s, 0, max);
133    printf("\n");
134    /* turn echo back on */
135    tty_state.sg_flags |= ECHO;
136    if (ioctl(0,TIOCSETP,(char *)&tty_state))
137	ok = 0;
138/*
139    pop_signals();
140*/
141    memmove((char *)old_env, (char *)env, sizeof(env));
142    if (verify)
143	memset(key_string, 0, sizeof (key_string));
144    s[max-1] = 0;		/* force termination */
145    return !ok;			/* return nonzero if not okay */
146}
147#endif	/* defined(RSA_ENCPWD) || defined(KRB4_ENCPWD) */
148