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__FBSDID("$FreeBSD: src/contrib/telnet/libtelnet/read_password.c,v 1.5 2001/11/30 21:06:34 markm Exp $");
37
38#ifndef lint
39#if 0
40static char sccsid[] = "@(#)read_password.c	8.3 (Berkeley) 5/30/95";
41#endif
42#endif /* not lint */
43
44/*
45 * $Source: /mit/kerberos/src/lib/des/RCS/read_password.c,v $
46 * $Author: jon $
47 *
48 * Copyright 1985, 1986, 1987, 1988 by the Massachusetts Institute
49 * of Technology.
50 *
51 * For copying and distribution information, please see the file
52 * <mit-copyright.h>.
53 *
54 * This routine prints the supplied string to standard
55 * output as a prompt, and reads a password string without
56 * echoing.
57 */
58
59#if	defined(RSA_ENCPWD) || defined(KRB4_ENCPWD)
60
61#include <stdio.h>
62#include <strings.h>
63#include <sys/ioctl.h>
64#include <signal.h>
65#include <setjmp.h>
66
67static jmp_buf env;
68
69/*** Routines ****************************************************** */
70/*
71 * This version just returns the string, doesn't map to key.
72 *
73 * Returns 0 on success, non-zero on failure.
74 */
75
76int
77local_des_read_pw_string(s,max,prompt,verify)
78    char *s;
79    int	max;
80    char *prompt;
81    int	verify;
82{
83    int ok = 0;
84    char *ptr;
85
86    jmp_buf old_env;
87    struct sgttyb tty_state;
88    char key_string[BUFSIZ];
89
90    if (max > BUFSIZ) {
91	return -1;
92    }
93
94    /* XXX assume jmp_buf is typedef'ed to an array */
95    memmove((char *)env, (char *)old_env, sizeof(env));
96    if (setjmp(env))
97	goto lose;
98
99    /* save terminal state*/
100    if (ioctl(0,TIOCGETP,(char *)&tty_state) == -1)
101	return -1;
102/*
103    push_signals();
104*/
105    /* Turn off echo */
106    tty_state.sg_flags &= ~ECHO;
107    if (ioctl(0,TIOCSETP,(char *)&tty_state) == -1)
108	return -1;
109    while (!ok) {
110	(void) printf("%s", prompt);
111	(void) fflush(stdout);
112	while (!fgets(s, max, stdin));
113
114	if ((ptr = strchr(s, '\n')))
115	    *ptr = '\0';
116	if (verify) {
117	    printf("\nVerifying, please re-enter %s",prompt);
118	    (void) fflush(stdout);
119	    if (!fgets(key_string, sizeof(key_string), stdin)) {
120		clearerr(stdin);
121		continue;
122	    }
123	    if ((ptr = strchr(key_string, '\n')))
124	    *ptr = '\0';
125	    if (strcmp(s,key_string)) {
126		printf("\n\07\07Mismatch - try again\n");
127		(void) fflush(stdout);
128		continue;
129	    }
130	}
131	ok = 1;
132    }
133
134lose:
135    if (!ok)
136	memset(s, 0, max);
137    printf("\n");
138    /* turn echo back on */
139    tty_state.sg_flags |= ECHO;
140    if (ioctl(0,TIOCSETP,(char *)&tty_state))
141	ok = 0;
142/*
143    pop_signals();
144*/
145    memmove((char *)old_env, (char *)env, sizeof(env));
146    if (verify)
147	memset(key_string, 0, sizeof (key_string));
148    s[max-1] = 0;		/* force termination */
149    return !ok;			/* return nonzero if not okay */
150}
151#endif	/* defined(RSA_ENCPWD) || defined(KRB4_ENCPWD) */
152