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
32 static 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
59 static 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
68 int
local_des_read_pw_string(s,max,prompt,verify)69 local_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
126 lose:
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