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 #if 0 36 static char sccsid[] = "@(#)read_password.c 8.3 (Berkeley) 5/30/95"; 37 #endif 38 static const char rcsid[] = 39 "$FreeBSD$"; 40 #endif /* not lint */ 41 42 /* 43 * $Source: /mit/kerberos/src/lib/des/RCS/read_password.c,v $ 44 * $Author: jon $ 45 * 46 * Copyright 1985, 1986, 1987, 1988 by the Massachusetts Institute 47 * of Technology. 48 * 49 * For copying and distribution information, please see the file 50 * <mit-copyright.h>. 51 * 52 * This routine prints the supplied string to standard 53 * output as a prompt, and reads a password string without 54 * echoing. 55 */ 56 57 #if defined(RSA_ENCPWD) || defined(KRB4_ENCPWD) 58 59 #include <stdio.h> 60 #include <strings.h> 61 #include <sys/ioctl.h> 62 #include <signal.h> 63 #include <setjmp.h> 64 65 static jmp_buf env; 66 67 /*** Routines ****************************************************** */ 68 /* 69 * This version just returns the string, doesn't map to key. 70 * 71 * Returns 0 on success, non-zero on failure. 72 */ 73 74 int 75 local_des_read_pw_string(s,max,prompt,verify) 76 char *s; 77 int max; 78 char *prompt; 79 int verify; 80 { 81 int ok = 0; 82 char *ptr; 83 84 jmp_buf old_env; 85 struct sgttyb tty_state; 86 char key_string[BUFSIZ]; 87 88 if (max > BUFSIZ) { 89 return -1; 90 } 91 92 /* XXX assume jmp_buf is typedef'ed to an array */ 93 memmove((char *)env, (char *)old_env, sizeof(env)); 94 if (setjmp(env)) 95 goto lose; 96 97 /* save terminal state*/ 98 if (ioctl(0,TIOCGETP,(char *)&tty_state) == -1) 99 return -1; 100 /* 101 push_signals(); 102 */ 103 /* Turn off echo */ 104 tty_state.sg_flags &= ~ECHO; 105 if (ioctl(0,TIOCSETP,(char *)&tty_state) == -1) 106 return -1; 107 while (!ok) { 108 (void) printf("%s", prompt); 109 (void) fflush(stdout); 110 while (!fgets(s, max, stdin)); 111 112 if ((ptr = strchr(s, '\n'))) 113 *ptr = '\0'; 114 if (verify) { 115 printf("\nVerifying, please re-enter %s",prompt); 116 (void) fflush(stdout); 117 if (!fgets(key_string, sizeof(key_string), stdin)) { 118 clearerr(stdin); 119 continue; 120 } 121 if ((ptr = strchr(key_string, '\n'))) 122 *ptr = '\0'; 123 if (strcmp(s,key_string)) { 124 printf("\n\07\07Mismatch - try again\n"); 125 (void) fflush(stdout); 126 continue; 127 } 128 } 129 ok = 1; 130 } 131 132 lose: 133 if (!ok) 134 memset(s, 0, max); 135 printf("\n"); 136 /* turn echo back on */ 137 tty_state.sg_flags |= ECHO; 138 if (ioctl(0,TIOCSETP,(char *)&tty_state)) 139 ok = 0; 140 /* 141 pop_signals(); 142 */ 143 memmove((char *)old_env, (char *)env, sizeof(env)); 144 if (verify) 145 memset(key_string, 0, sizeof (key_string)); 146 s[max-1] = 0; /* force termination */ 147 return !ok; /* return nonzero if not okay */ 148 } 149 #endif /* defined(RSA_ENCPWD) || defined(KRB4_ENCPWD) */ 150