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("$FreeBSD$");
33
34 #ifndef lint
35 #if 0
36 static 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
63 static 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
72 int
local_des_read_pw_string(s,max,prompt,verify)73 local_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
130 lose:
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