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. All advertising materials mentioning features or use of this software
14 *    must display the following acknowledgement:
15 *	This product includes software developed by the University of
16 *	California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34#include <sys/cdefs.h>
35
36#ifdef __FBSDID
37__FBSDID("$FreeBSD: src/crypto/telnet/libtelnet/read_password.c,v 1.1.1.1.8.2 2002/04/13 10:59:07 markm Exp $");
38#endif
39
40#ifndef lint
41#if 0
42static char sccsid[] = "@(#)read_password.c	8.3 (Berkeley) 5/30/95";
43#endif
44#endif /* not lint */
45
46/*
47 * $Source: /Users/Shared/libtelnet/libtelnet/read_password.c,v $
48 * $Author: nicolai $
49 *
50 * Copyright 1985, 1986, 1987, 1988 by the Massachusetts Institute
51 * of Technology.
52 *
53 * For copying and distribution information, please see the file
54 * <mit-copyright.h>.
55 *
56 * This routine prints the supplied string to standard
57 * output as a prompt, and reads a password string without
58 * echoing.
59 */
60
61#if	defined(RSA_ENCPWD) || defined(KRB4_ENCPWD)
62
63#include <stdio.h>
64#include <strings.h>
65#include <sys/ioctl.h>
66#include <signal.h>
67#include <setjmp.h>
68
69static jmp_buf env;
70
71/*** Routines ****************************************************** */
72/*
73 * This version just returns the string, doesn't map to key.
74 *
75 * Returns 0 on success, non-zero on failure.
76 */
77
78int
79local_des_read_pw_string(s,max,prompt,verify)
80    char *s;
81    int	max;
82    char *prompt;
83    int	verify;
84{
85    int ok = 0;
86    char *ptr;
87
88    jmp_buf old_env;
89    struct sgttyb tty_state;
90    char key_string[BUFSIZ];
91
92    if (max > BUFSIZ) {
93	return -1;
94    }
95
96    /* XXX assume jmp_buf is typedef'ed to an array */
97    memmove((char *)env, (char *)old_env, sizeof(env));
98    if (setjmp(env))
99	goto lose;
100
101    /* save terminal state*/
102    if (ioctl(0,TIOCGETP,(char *)&tty_state) == -1)
103	return -1;
104/*
105    push_signals();
106*/
107    /* Turn off echo */
108    tty_state.sg_flags &= ~ECHO;
109    if (ioctl(0,TIOCSETP,(char *)&tty_state) == -1)
110	return -1;
111    while (!ok) {
112	(void) printf("%s", prompt);
113	(void) fflush(stdout);
114	while (!fgets(s, max, stdin));
115
116	if ((ptr = strchr(s, '\n')))
117	    *ptr = '\0';
118	if (verify) {
119	    printf("\nVerifying, please re-enter %s",prompt);
120	    (void) fflush(stdout);
121	    if (!fgets(key_string, sizeof(key_string), stdin)) {
122		clearerr(stdin);
123		continue;
124	    }
125	    if ((ptr = strchr(key_string, '\n')))
126	    *ptr = '\0';
127	    if (strcmp(s,key_string)) {
128		printf("\n\07\07Mismatch - try again\n");
129		(void) fflush(stdout);
130		continue;
131	    }
132	}
133	ok = 1;
134    }
135
136lose:
137    if (!ok)
138	memset(s, 0, max);
139    printf("\n");
140    /* turn echo back on */
141    tty_state.sg_flags |= ECHO;
142    if (ioctl(0,TIOCSETP,(char *)&tty_state))
143	ok = 0;
144/*
145    pop_signals();
146*/
147    memmove((char *)old_env, (char *)env, sizeof(env));
148    if (verify)
149	memset(key_string, 0, sizeof (key_string));
150    s[max-1] = 0;		/* force termination */
151    return !ok;			/* return nonzero if not okay */
152}
153#endif	/* defined(RSA_ENCPWD) || defined(KRB4_ENCPWD) */
154