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 30 #ifndef lint 31 #if 0 32 static char sccsid[] = "@(#)read_password.c 8.3 (Berkeley) 5/30/95"; 33 #endif 34 #endif /* not lint */ 35 36 /* 37 * $Source: /mit/kerberos/src/lib/des/RCS/read_password.c,v $ 38 * $Author: jon $ 39 * 40 * Copyright 1985, 1986, 1987, 1988 by the Massachusetts Institute 41 * of Technology. 42 * 43 * For copying and distribution information, please see the file 44 * <mit-copyright.h>. 45 * 46 * This routine prints the supplied string to standard 47 * output as a prompt, and reads a password string without 48 * echoing. 49 */ 50 51 #if defined(RSA_ENCPWD) || defined(KRB4_ENCPWD) 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 memmove((char *)env, (char *)old_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("%s", prompt); 103 (void) fflush(stdout); 104 while (!fgets(s, max, stdin)); 105 106 if ((ptr = strchr(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 = strchr(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 memset(s, 0, 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 memmove((char *)old_env, (char *)env, sizeof(env)); 138 if (verify) 139 memset(key_string, 0, sizeof (key_string)); 140 s[max-1] = 0; /* force termination */ 141 return !ok; /* return nonzero if not okay */ 142 } 143 #endif /* defined(RSA_ENCPWD) || defined(KRB4_ENCPWD) */ 144