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 * @(#)read_password.c 8.3 (Berkeley) 5/30/95 30 * $FreeBSD: src/crypto/telnet/libtelnet/read_password.c,v 1.1.1.1.8.2 2002/04/13 10:59:07 markm Exp $ 31 */ 32 33 /* 34 * $Source: /mit/kerberos/src/lib/des/RCS/read_password.c,v $ 35 * $Author: jon $ 36 * 37 * Copyright 1985, 1986, 1987, 1988 by the Massachusetts Institute 38 * of Technology. 39 * 40 * For copying and distribution information, please see the file 41 * <mit-copyright.h>. 42 * 43 * This routine prints the supplied string to standard 44 * output as a prompt, and reads a password string without 45 * echoing. 46 */ 47 48 #if defined(RSA_ENCPWD) || defined(KRB4_ENCPWD) 49 50 #include <stdio.h> 51 #include <strings.h> 52 #include <sys/ioctl.h> 53 #include <signal.h> 54 #include <setjmp.h> 55 56 static jmp_buf env; 57 58 /*** Routines ****************************************************** */ 59 /* 60 * This version just returns the string, doesn't map to key. 61 * 62 * Returns 0 on success, non-zero on failure. 63 */ 64 65 int 66 local_des_read_pw_string(s,max,prompt,verify) 67 char *s; 68 int max; 69 char *prompt; 70 int verify; 71 { 72 int ok = 0; 73 char *ptr; 74 75 jmp_buf old_env; 76 struct sgttyb tty_state; 77 char key_string[BUFSIZ]; 78 79 if (max > BUFSIZ) { 80 return -1; 81 } 82 83 /* XXX assume jmp_buf is typedef'ed to an array */ 84 memmove((char *)env, (char *)old_env, sizeof(env)); 85 if (setjmp(env)) 86 goto lose; 87 88 /* save terminal state*/ 89 if (ioctl(0,TIOCGETP,(char *)&tty_state) == -1) 90 return -1; 91 /* 92 push_signals(); 93 */ 94 /* Turn off echo */ 95 tty_state.sg_flags &= ~ECHO; 96 if (ioctl(0,TIOCSETP,(char *)&tty_state) == -1) 97 return -1; 98 while (!ok) { 99 (void) printf("%s", prompt); 100 (void) fflush(stdout); 101 while (!fgets(s, max, stdin)); 102 103 if ((ptr = strchr(s, '\n'))) 104 *ptr = '\0'; 105 if (verify) { 106 printf("\nVerifying, please re-enter %s",prompt); 107 (void) fflush(stdout); 108 if (!fgets(key_string, sizeof(key_string), stdin)) { 109 clearerr(stdin); 110 continue; 111 } 112 if ((ptr = strchr(key_string, '\n'))) 113 *ptr = '\0'; 114 if (strcmp(s,key_string)) { 115 printf("\n\07\07Mismatch - try again\n"); 116 (void) fflush(stdout); 117 continue; 118 } 119 } 120 ok = 1; 121 } 122 123 lose: 124 if (!ok) 125 memset(s, 0, max); 126 printf("\n"); 127 /* turn echo back on */ 128 tty_state.sg_flags |= ECHO; 129 if (ioctl(0,TIOCSETP,(char *)&tty_state)) 130 ok = 0; 131 /* 132 pop_signals(); 133 */ 134 memmove((char *)old_env, (char *)env, sizeof(env)); 135 if (verify) 136 memset(key_string, 0, sizeof (key_string)); 137 s[max-1] = 0; /* force termination */ 138 return !ok; /* return nonzero if not okay */ 139 } 140 #endif /* defined(RSA_ENCPWD) || defined(KRB4_ENCPWD) */ 141