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146 lines
4.3 KiB
C
146 lines
4.3 KiB
C
/*-
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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static char sccsid[] = "@(#)read_password.c 8.3 (Berkeley) 5/30/95";
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#endif /* not lint */
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/*
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* $Source: /mit/kerberos/src/lib/des/RCS/read_password.c,v $
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* $Author: jon $
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*
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* Copyright 1985, 1986, 1987, 1988 by the Massachusetts Institute
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* of Technology.
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*
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* For copying and distribution information, please see the file
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* <mit-copyright.h>.
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*
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* This routine prints the supplied string to standard
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* output as a prompt, and reads a password string without
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* echoing.
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*/
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#if defined(RSA_ENCPWD) || defined(KRB4_ENCPWD)
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#include <stdio.h>
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#include <strings.h>
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#include <sys/ioctl.h>
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#include <signal.h>
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#include <setjmp.h>
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static jmp_buf env;
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/*** Routines ****************************************************** */
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/*
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* This version just returns the string, doesn't map to key.
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*
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* Returns 0 on success, non-zero on failure.
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*/
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int
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local_des_read_pw_string(s,max,prompt,verify)
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char *s;
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int max;
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char *prompt;
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int verify;
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{
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int ok = 0;
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char *ptr;
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jmp_buf old_env;
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struct sgttyb tty_state;
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char key_string[BUFSIZ];
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if (max > BUFSIZ) {
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return -1;
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}
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/* XXX assume jmp_buf is typedef'ed to an array */
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memmove((char *)env, (char *)old_env, sizeof(env));
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if (setjmp(env))
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goto lose;
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/* save terminal state*/
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if (ioctl(0,TIOCGETP,(char *)&tty_state) == -1)
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return -1;
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/*
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push_signals();
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*/
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/* Turn off echo */
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tty_state.sg_flags &= ~ECHO;
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if (ioctl(0,TIOCSETP,(char *)&tty_state) == -1)
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return -1;
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while (!ok) {
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(void) printf(prompt);
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(void) fflush(stdout);
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while (!fgets(s, max, stdin));
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if ((ptr = strchr(s, '\n')))
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*ptr = '\0';
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if (verify) {
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printf("\nVerifying, please re-enter %s",prompt);
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(void) fflush(stdout);
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if (!fgets(key_string, sizeof(key_string), stdin)) {
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clearerr(stdin);
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continue;
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}
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if ((ptr = strchr(key_string, '\n')))
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*ptr = '\0';
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if (strcmp(s,key_string)) {
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printf("\n\07\07Mismatch - try again\n");
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(void) fflush(stdout);
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continue;
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}
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}
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ok = 1;
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}
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lose:
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if (!ok)
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memset(s, 0, max);
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printf("\n");
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/* turn echo back on */
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tty_state.sg_flags |= ECHO;
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if (ioctl(0,TIOCSETP,(char *)&tty_state))
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ok = 0;
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/*
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pop_signals();
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*/
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memmove((char *)old_env, (char *)env, sizeof(env));
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if (verify)
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memset(key_string, 0, sizeof (key_string));
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s[max-1] = 0; /* force termination */
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return !ok; /* return nonzero if not okay */
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}
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#endif /* defined(RSA_ENCPWD) || defined(KRB4_ENCPWD) */
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