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("$FreeBSD$");
37 
38 #ifndef lint
39 #if 0
40 static 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 
67 static 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 
76 int
77 local_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 
134 lose:
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