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 */ 36 37 /* 38 * $Source: /mit/kerberos/src/lib/des/RCS/read_password.c,v $ 39 * $Author: jon $ 40 * 41 * Copyright 1985, 1986, 1987, 1988 by the Massachusetts Institute 42 * of Technology. 43 * 44 * For copying and distribution information, please see the file 45 * <mit-copyright.h>. 46 * 47 * This routine prints the supplied string to standard 48 * output as a prompt, and reads a password string without 49 * echoing. 50 */ 51 52 #if defined(RSA_ENCPWD) || defined(KRB4_ENCPWD) 53 54 #include <stdio.h> 55 #include <strings.h> 56 #include <sys/ioctl.h> 57 #include <signal.h> 58 #include <setjmp.h> 59 60 static jmp_buf env; 61 62 /*** Routines ****************************************************** */ 63 /* 64 * This version just returns the string, doesn't map to key. 65 * 66 * Returns 0 on success, non-zero on failure. 67 */ 68 69 int 70 local_des_read_pw_string(s,max,prompt,verify) 71 char *s; 72 int max; 73 char *prompt; 74 int verify; 75 { 76 int ok = 0; 77 char *ptr; 78 79 jmp_buf old_env; 80 struct sgttyb tty_state; 81 char key_string[BUFSIZ]; 82 83 if (max > BUFSIZ) { 84 return -1; 85 } 86 87 /* XXX assume jmp_buf is typedef'ed to an array */ 88 memmove((char *)env, (char *)old_env, sizeof(env)); 89 if (setjmp(env)) 90 goto lose; 91 92 /* save terminal state*/ 93 if (ioctl(0,TIOCGETP,(char *)&tty_state) == -1) 94 return -1; 95 /* 96 push_signals(); 97 */ 98 /* Turn off echo */ 99 tty_state.sg_flags &= ~ECHO; 100 if (ioctl(0,TIOCSETP,(char *)&tty_state) == -1) 101 return -1; 102 while (!ok) { 103 (void) printf("%s", prompt); 104 (void) fflush(stdout); 105 while (!fgets(s, max, stdin)); 106 107 if ((ptr = strchr(s, '\n'))) 108 *ptr = '\0'; 109 if (verify) { 110 printf("\nVerifying, please re-enter %s",prompt); 111 (void) fflush(stdout); 112 if (!fgets(key_string, sizeof(key_string), stdin)) { 113 clearerr(stdin); 114 continue; 115 } 116 if ((ptr = strchr(key_string, '\n'))) 117 *ptr = '\0'; 118 if (strcmp(s,key_string)) { 119 printf("\n\07\07Mismatch - try again\n"); 120 (void) fflush(stdout); 121 continue; 122 } 123 } 124 ok = 1; 125 } 126 127 lose: 128 if (!ok) 129 memset(s, 0, max); 130 printf("\n"); 131 /* turn echo back on */ 132 tty_state.sg_flags |= ECHO; 133 if (ioctl(0,TIOCSETP,(char *)&tty_state)) 134 ok = 0; 135 /* 136 pop_signals(); 137 */ 138 memmove((char *)old_env, (char *)env, sizeof(env)); 139 if (verify) 140 memset(key_string, 0, sizeof (key_string)); 141 s[max-1] = 0; /* force termination */ 142 return !ok; /* return nonzero if not okay */ 143 } 144 #endif /* defined(RSA_ENCPWD) || defined(KRB4_ENCPWD) */ 145