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#ifndef lint
31#if 0
32static char sccsid[] = "@(#)read_password.c	8.3 (Berkeley) 5/30/95";
33#endif
34#endif /* not lint */
35
36/*
37 * $Source: /mit/kerberos/src/lib/des/RCS/read_password.c,v $
38 * $Author: jon $
39 *
40 * Copyright 1985, 1986, 1987, 1988 by the Massachusetts Institute
41 * of Technology.
42 *
43 * For copying and distribution information, please see the file
44 * <mit-copyright.h>.
45 *
46 * This routine prints the supplied string to standard
47 * output as a prompt, and reads a password string without
48 * echoing.
49 */
50
51#if	defined(RSA_ENCPWD) || defined(KRB4_ENCPWD)
52
53#include <stdio.h>
54#include <strings.h>
55#include <sys/ioctl.h>
56#include <signal.h>
57#include <setjmp.h>
58
59static jmp_buf env;
60
61/*** Routines ****************************************************** */
62/*
63 * This version just returns the string, doesn't map to key.
64 *
65 * Returns 0 on success, non-zero on failure.
66 */
67
68int
69local_des_read_pw_string(s,max,prompt,verify)
70    char *s;
71    int	max;
72    char *prompt;
73    int	verify;
74{
75    int ok = 0;
76    char *ptr;
77
78    jmp_buf old_env;
79    struct sgttyb tty_state;
80    char key_string[BUFSIZ];
81
82    if (max > BUFSIZ) {
83	return -1;
84    }
85
86    /* XXX assume jmp_buf is typedef'ed to an array */
87    memmove((char *)env, (char *)old_env, sizeof(env));
88    if (setjmp(env))
89	goto lose;
90
91    /* save terminal state*/
92    if (ioctl(0,TIOCGETP,(char *)&tty_state) == -1)
93	return -1;
94/*
95    push_signals();
96*/
97    /* Turn off echo */
98    tty_state.sg_flags &= ~ECHO;
99    if (ioctl(0,TIOCSETP,(char *)&tty_state) == -1)
100	return -1;
101    while (!ok) {
102	(void) printf("%s", prompt);
103	(void) fflush(stdout);
104	while (!fgets(s, max, stdin));
105
106	if ((ptr = strchr(s, '\n')))
107	    *ptr = '\0';
108	if (verify) {
109	    printf("\nVerifying, please re-enter %s",prompt);
110	    (void) fflush(stdout);
111	    if (!fgets(key_string, sizeof(key_string), stdin)) {
112		clearerr(stdin);
113		continue;
114	    }
115	    if ((ptr = strchr(key_string, '\n')))
116	    *ptr = '\0';
117	    if (strcmp(s,key_string)) {
118		printf("\n\07\07Mismatch - try again\n");
119		(void) fflush(stdout);
120		continue;
121	    }
122	}
123	ok = 1;
124    }
125
126lose:
127    if (!ok)
128	memset(s, 0, max);
129    printf("\n");
130    /* turn echo back on */
131    tty_state.sg_flags |= ECHO;
132    if (ioctl(0,TIOCSETP,(char *)&tty_state))
133	ok = 0;
134/*
135    pop_signals();
136*/
137    memmove((char *)old_env, (char *)env, sizeof(env));
138    if (verify)
139	memset(key_string, 0, sizeof (key_string));
140    s[max-1] = 0;		/* force termination */
141    return !ok;			/* return nonzero if not okay */
142}
143#endif	/* defined(RSA_ENCPWD) || defined(KRB4_ENCPWD) */
144