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 * @(#)read_password.c 8.3 (Berkeley) 5/30/95 34 * $FreeBSD: src/crypto/telnet/libtelnet/read_password.c,v 1.1.1.1.8.2 2002/04/13 10:59:07 markm Exp $ 35 * $DragonFly: src/crypto/telnet/libtelnet/read_password.c,v 1.2 2003/06/17 04:24:37 dillon Exp $ 36 */ 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 #if defined(RSA_ENCPWD) || defined(KRB4_ENCPWD) 54 55 #include <stdio.h> 56 #include <strings.h> 57 #include <sys/ioctl.h> 58 #include <signal.h> 59 #include <setjmp.h> 60 61 static jmp_buf env; 62 63 /*** Routines ****************************************************** */ 64 /* 65 * This version just returns the string, doesn't map to key. 66 * 67 * Returns 0 on success, non-zero on failure. 68 */ 69 70 int 71 local_des_read_pw_string(s,max,prompt,verify) 72 char *s; 73 int max; 74 char *prompt; 75 int verify; 76 { 77 int ok = 0; 78 char *ptr; 79 80 jmp_buf old_env; 81 struct sgttyb tty_state; 82 char key_string[BUFSIZ]; 83 84 if (max > BUFSIZ) { 85 return -1; 86 } 87 88 /* XXX assume jmp_buf is typedef'ed to an array */ 89 memmove((char *)env, (char *)old_env, sizeof(env)); 90 if (setjmp(env)) 91 goto lose; 92 93 /* save terminal state*/ 94 if (ioctl(0,TIOCGETP,(char *)&tty_state) == -1) 95 return -1; 96 /* 97 push_signals(); 98 */ 99 /* Turn off echo */ 100 tty_state.sg_flags &= ~ECHO; 101 if (ioctl(0,TIOCSETP,(char *)&tty_state) == -1) 102 return -1; 103 while (!ok) { 104 (void) printf("%s", prompt); 105 (void) fflush(stdout); 106 while (!fgets(s, max, stdin)); 107 108 if ((ptr = strchr(s, '\n'))) 109 *ptr = '\0'; 110 if (verify) { 111 printf("\nVerifying, please re-enter %s",prompt); 112 (void) fflush(stdout); 113 if (!fgets(key_string, sizeof(key_string), stdin)) { 114 clearerr(stdin); 115 continue; 116 } 117 if ((ptr = strchr(key_string, '\n'))) 118 *ptr = '\0'; 119 if (strcmp(s,key_string)) { 120 printf("\n\07\07Mismatch - try again\n"); 121 (void) fflush(stdout); 122 continue; 123 } 124 } 125 ok = 1; 126 } 127 128 lose: 129 if (!ok) 130 memset(s, 0, max); 131 printf("\n"); 132 /* turn echo back on */ 133 tty_state.sg_flags |= ECHO; 134 if (ioctl(0,TIOCSETP,(char *)&tty_state)) 135 ok = 0; 136 /* 137 pop_signals(); 138 */ 139 memmove((char *)old_env, (char *)env, sizeof(env)); 140 if (verify) 141 memset(key_string, 0, sizeof (key_string)); 142 s[max-1] = 0; /* force termination */ 143 return !ok; /* return nonzero if not okay */ 144 } 145 #endif /* defined(RSA_ENCPWD) || defined(KRB4_ENCPWD) */ 146