| 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 | #ifndef lint |
| 35 | static char sccsid[] = "@(#)read_password.c 8.1 (Berkeley) 6/4/93"; |
| 36 | #endif /* not lint */ |
| 37 | |
| 38 | /* |
| 39 | * $Source: /mit/kerberos/src/lib/des/RCS/read_password.c,v $ |
| 40 | * $Author: jon $ |
| 41 | * |
| 42 | * Copyright 1985, 1986, 1987, 1988 by the Massachusetts Institute |
| 43 | * of Technology. |
| 44 | * |
| 45 | * For copying and distribution information, please see the file |
| 46 | * <mit-copyright.h>. |
| 47 | * |
| 48 | * This routine prints the supplied string to standard |
| 49 | * output as a prompt, and reads a password string without |
| 50 | * echoing. |
| 51 | */ |
| 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 |
| 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 | bcopy((char *)old_env, (char *)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(prompt); |
| 103 | (void) fflush(stdout); |
| 104 | while (!fgets(s, max, stdin)); |
| 105 | |
| 106 | if ((ptr = index(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 = index(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 | bzero(s, 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 | bcopy((char *)env, (char *)old_env, sizeof(env)); |
| 138 | if (verify) |
| 139 | bzero(key_string, sizeof (key_string)); |
| 140 | s[max-1] = 0; /* force termination */ |
| 141 | return !ok; /* return nonzero if not okay */ |
| 142 | } |