Introduce readpassphrase(3), a superset of getpass(3). This
comes originally from Todd Miller. Obtained from: OpenBSD
This commit is contained in:
parent
6eb9bd2d1f
commit
13d98e8c66
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=86669
@ -16,7 +16,7 @@ FILES= a.out.h ar.h assert.h bitstring.h complex.h ctype.h db.h \
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libgen.h limits.h link.h locale.h malloc.h memory.h monetary.h mpool.h \
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ndbm.h netconfig.h netdb.h nl_types.h nlist.h nsswitch.h objformat.h \
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paths.h pthread.h pthread_np.h pwd.h \
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ranlib.h regex.h regexp.h resolv.h rune.h runetype.h \
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ranlib.h readpassphrase.h regex.h regexp.h resolv.h rune.h runetype.h \
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search.h setjmp.h sgtty.h \
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signal.h stab.h stdbool.h stddef.h stdio.h stdlib.h strhash.h \
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string.h stringlist.h strings.h sysexits.h tar.h time.h timers.h \
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|
47
include/readpassphrase.h
Normal file
47
include/readpassphrase.h
Normal file
@ -0,0 +1,47 @@
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/* $OpenBSD: readpassphrase.h,v 1.1 2000/11/21 00:48:38 millert Exp $ */
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/* $FreeBSD$ */
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/*
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* Copyright (c) 2000 Todd C. Miller <Todd.Miller@courtesan.com>
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* 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. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
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* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
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* THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _READPASSPHRASE_H_
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#define _READPASSPHRASE_H_
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#define RPP_ECHO_OFF 0x00 /* Turn off echo (default). */
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#define RPP_ECHO_ON 0x01 /* Leave echo on. */
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#define RPP_REQUIRE_TTY 0x02 /* Fail if there is no tty. */
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#define RPP_FORCELOWER 0x04 /* Force input to lower case. */
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#define RPP_FORCEUPPER 0x08 /* Force input to upper case. */
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#define RPP_SEVENBIT 0x10 /* Strip the high bit from input. */
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#include <sys/cdefs.h>
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__BEGIN_DECLS
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char * readpassphrase __P((const char *, char *, size_t, int));
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__END_DECLS
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#endif /* !_READPASSPHRASE_H_ */
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@ -13,7 +13,7 @@ SRCS+= __xuname.c _pthread_stubs.c _rand48.c _spinlock_stub.c _thread_init.c \
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getcap.c getcwd.c getdomainname.c getgrent.c getgrouplist.c \
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gethostname.c getloadavg.c getlogin.c getmntinfo.c getnetgrent.c \
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getobjformat.c getosreldate.c getpagesize.c \
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getpass.c getpeereid.c getprogname.c getpwent.c getttyent.c \
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getpeereid.c getprogname.c getpwent.c getttyent.c \
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getusershell.c getvfsbyname.c getvfsent.c glob.c \
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initgroups.c isatty.c jrand48.c lcong48.c \
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lockf.c lrand48.c mrand48.c msgctl.c \
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@ -21,6 +21,7 @@ SRCS+= __xuname.c _pthread_stubs.c _rand48.c _spinlock_stub.c _thread_init.c \
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nlist.c nrand48.c ntp_gettime.c opendir.c \
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pause.c popen.c psignal.c pw_scan.c pwcache.c raise.c readdir.c rewinddir.c \
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posixshm.c \
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readpassphrase.c \
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scandir.c seed48.c seekdir.c semconfig.c semctl.c semget.c semop.c \
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setdomainname.c sethostname.c setjmperr.c setmode.c setprogname.c \
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setproctitle.c \
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@ -51,7 +52,7 @@ MAN+= alarm.3 arc4random.3 clock.3 \
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glob.3 initgroups.3 isinf.3 \
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ldexp.3 lockf.3 modf.3 msgctl.3 msgget.3 msgrcv.3 msgsnd.3 \
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nice.3 nlist.3 pause.3 popen.3 psignal.3 pwcache.3 \
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raise.3 rand48.3 rfork_thread.3 \
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raise.3 rand48.3 readpassphrase.3 rfork_thread.3 \
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scandir.3 setjmp.3 setmode.3 setproctitle.3 shm_open.3 \
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siginterrupt.3 signal.3 sigsetops.3 sleep.3 stringlist.3 \
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strtofflags.3 sysconf.3 sysctl.3 syslog.3 tcgetpgrp.3 \
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@ -73,6 +73,7 @@ function returns a pointer to the null terminated password.
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.El
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.Sh SEE ALSO
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.Xr crypt 3
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.Xr readpassphrase 3
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.Sh HISTORY
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A
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.Fn getpass
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@ -1,99 +0,0 @@
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/*
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* Copyright (c) 1988, 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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* $FreeBSD$
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*/
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#if defined(LIBC_SCCS) && !defined(lint)
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static char sccsid[] = "@(#)getpass.c 8.1 (Berkeley) 6/4/93";
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#endif /* LIBC_SCCS and not lint */
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#include "namespace.h"
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#include <sys/termios.h>
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#include <signal.h>
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#include <paths.h>
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#include <pwd.h>
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#include <stdio.h>
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#include <unistd.h>
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#include "un-namespace.h"
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static struct termios oterm, term;
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static FILE *fp;
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char *
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getpass(prompt)
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const char *prompt;
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{
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register int ch;
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register char *p;
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FILE *outfp;
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static char buf[_PASSWORD_LEN + 1];
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sigset_t oset, nset;
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/*
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* read and write to /dev/tty if possible; else read from
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* stdin and write to stderr.
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*/
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if ((outfp = fp = fopen(_PATH_TTY, "w+")) == NULL) {
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outfp = stderr;
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fp = stdin;
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}
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/*
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* note - blocking signals isn't necessarily the
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* right thing, but we leave it for now.
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*/
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sigemptyset(&nset);
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sigaddset(&nset, SIGINT);
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sigaddset(&nset, SIGTSTP);
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(void)_sigprocmask(SIG_BLOCK, &nset, &oset);
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(void)tcgetattr(fileno(fp), &oterm);
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term = oterm;
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term.c_lflag &= ~ECHO;
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(void)tcsetattr(fileno(fp), TCSAFLUSH|TCSASOFT, &term);
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(void)fputs(prompt, outfp);
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rewind(outfp); /* implied flush */
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for (p = buf; (ch = getc(fp)) != EOF && ch != '\n';)
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if (p < buf + _PASSWORD_LEN)
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*p++ = ch;
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*p = '\0';
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(void)_write(fileno(outfp), "\n", 1);
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(void)tcsetattr(fileno(fp), TCSAFLUSH|TCSASOFT, &oterm);
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(void)_sigprocmask(SIG_SETMASK, &oset, NULL);
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if (fp != stdin)
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(void)fclose(fp);
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return(buf);
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}
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118
lib/libc/gen/readpassphrase.3
Normal file
118
lib/libc/gen/readpassphrase.3
Normal file
@ -0,0 +1,118 @@
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.\" $OpenBSD: readpassphrase.3,v 1.3 2001/08/06 10:42:25 mpech Exp $
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.\" $FreeBSD$
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.\"
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.\" Copyright (c) 2000 Todd C. Miller <Todd.Miller@courtesan.com>
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.\" 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. The name of the author may not be used to endorse or promote products
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.\" derived from this software without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
|
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.\" INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
|
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.\" AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
|
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.\" THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
|
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.\" EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
|
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.\" PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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.\" OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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.\" WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
|
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.\" OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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.\" ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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.\"
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.Dd November 20, 2000
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.Dt READPASSPHRASE 3
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.Os
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.Sh NAME
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.Nm readpassphrase
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.Nd get a passphrase from the user
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.Sh SYNOPSIS
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.Fd #include <readpassphrase.h>
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.Ft char *
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.Fn readpassphrase "const char *prompt" "char *buf" "size_t bufsiz" "int flags"
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.Sh DESCRIPTION
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The
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.Fn readpassphrase
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function displays a prompt to, and reads in a passphrase from,
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.Pa /dev/tty .
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If this file is inaccessible
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and the
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.Dv RPP_REQUIRE_TTY
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flag is not set,
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.Fn readpassphrase
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displays the prompt on the standard error output and reads from the standard
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input.
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In this case it is generally not possible to turn off echo.
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.Pp
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Up to
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.Fa bufsiz
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- 1 characters (one is for the NUL) are read into the provided buffer
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.Fa buf .
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Any additional
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characters and the terminating newline (or return) character are discarded.
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.Pp
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.Fn readpassphrase
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takes the following optional
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.Fa flags :
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.Pp
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.Bd -literal -offset indent -compact
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RPP_ECHO_OFF turn off echo (default behavior)
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RPP_ECHO_ON leave echo on
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RPP_REQUIRE_TTY fail if there is no tty
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RPP_FORCELOWER force input to lower case
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RPP_FORCEUPPER force input to upper case
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RPP_SEVENBIT strip the high bit from input
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.Ed
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.Pp
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The calling process should zero the passphrase as soon as possible to
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avoid leaving the cleartext passphrase visible in the process's address
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space.
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.Sh RETURN VALUES
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On success,
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.Fn readpassphrase
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returns a pointer to the null-terminated passphrase.
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If the
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.Dv RPP_REQUIRE_TTY
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flag is set and
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.Pa /dev/tty
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is inaccessible,
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.Fn readpassphrase
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returns a null pointer.
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.Sh EXAMPLES
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The following code fragment will read a passphrase from
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.Pa /dev/tty
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into the buffer
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.Fa passbuf.
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.Bd -literal -offset indent
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char passbuf[1024];
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\&...
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if (readpassphrase("Response: ", passbuf, sizeof(passbuf),
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RPP_REQUIRE_TTY) == NULL)
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errx(1, "unable to read passphrase");
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if (compare(transform(passbuf), epass) != 0)
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errx(1, "bad passphrase");
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\&...
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memset(passbuf, 0, sizeof(passbuf));
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.Ed
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.Sh FILES
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.Bl -tag -width /dev/tty -compact
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.It Pa /dev/tty
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.El
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.Sh SEE ALSO
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.Xr getpass 3
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.Sh HISTORY
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The
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.Fn readpassphrase
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function first appeared in
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.Ox 2.9 .
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134
lib/libc/gen/readpassphrase.c
Normal file
134
lib/libc/gen/readpassphrase.c
Normal file
@ -0,0 +1,134 @@
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/*
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* Copyright (c) 2000 Todd C. Miller <Todd.Miller@courtesan.com>
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* All rights reserved.
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*
|
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* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in the
|
||||
* documentation and/or other materials provided with the distribution.
|
||||
* 3. The name of the author may not be used to endorse or promote products
|
||||
* derived from this software without specific prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
|
||||
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
|
||||
* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
|
||||
* THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
|
||||
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
|
||||
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
|
||||
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
|
||||
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
|
||||
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
|
||||
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||||
*/
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#if defined(LIBC_SCCS) && !defined(lint)
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static const char rcsid[] = "$OpenBSD: readpassphrase.c,v 1.7 2001/08/07 19:34:11 millert Exp $";
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#endif /* LIBC_SCCS and not lint */
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <ctype.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <paths.h>
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#include <pwd.h>
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#include <signal.h>
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#include <string.h>
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#include <termios.h>
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#include <unistd.h>
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#include <readpassphrase.h>
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char *
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readpassphrase(prompt, buf, bufsiz, flags)
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const char *prompt;
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char *buf;
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size_t bufsiz;
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int flags;
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{
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struct termios term, oterm;
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char ch, *p, *end;
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int input, output;
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sigset_t oset, nset;
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/* I suppose we could alloc on demand in this case (XXX). */
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if (bufsiz == 0) {
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errno = EINVAL;
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return(NULL);
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}
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/*
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* Read and write to /dev/tty if available. If not, read from
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* stdin and write to stderr unless a tty is required.
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*/
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if ((input = output = open(_PATH_TTY, O_RDWR)) == -1) {
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if (flags & RPP_REQUIRE_TTY) {
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errno = ENOTTY;
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return(NULL);
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}
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input = STDIN_FILENO;
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output = STDERR_FILENO;
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}
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/*
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* We block SIGINT and SIGTSTP so the terminal is not left
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* in an inconsistent state (ie: no echo). It would probably
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* be better to simply catch these though.
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*/
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sigemptyset(&nset);
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sigaddset(&nset, SIGINT);
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sigaddset(&nset, SIGTSTP);
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(void)sigprocmask(SIG_BLOCK, &nset, &oset);
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/* Turn off echo if possible. */
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if (tcgetattr(input, &oterm) == 0) {
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memcpy(&term, &oterm, sizeof(term));
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if (!(flags & RPP_ECHO_ON) && (term.c_lflag & ECHO))
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term.c_lflag &= ~ECHO;
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if (term.c_cc[VSTATUS] != _POSIX_VDISABLE)
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term.c_cc[VSTATUS] = _POSIX_VDISABLE;
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(void)tcsetattr(input, TCSAFLUSH|TCSASOFT, &term);
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} else {
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memset(&term, 0, sizeof(term));
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memset(&oterm, 0, sizeof(oterm));
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}
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(void)write(output, prompt, strlen(prompt));
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end = buf + bufsiz - 1;
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for (p = buf; read(input, &ch, 1) == 1 && ch != '\n' && ch != '\r';) {
|
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if (p < end) {
|
||||
if ((flags & RPP_SEVENBIT))
|
||||
ch &= 0x7f;
|
||||
if (isalpha(ch)) {
|
||||
if ((flags & RPP_FORCELOWER))
|
||||
ch = tolower(ch);
|
||||
if ((flags & RPP_FORCEUPPER))
|
||||
ch = toupper(ch);
|
||||
}
|
||||
*p++ = ch;
|
||||
}
|
||||
}
|
||||
*p = '\0';
|
||||
if (!(term.c_lflag & ECHO))
|
||||
(void)write(output, "\n", 1);
|
||||
|
||||
/* Restore old terminal settings and signal mask. */
|
||||
if (memcmp(&term, &oterm, sizeof(term)) != 0)
|
||||
(void)tcsetattr(input, TCSAFLUSH|TCSASOFT, &oterm);
|
||||
(void)sigprocmask(SIG_SETMASK, &oset, NULL);
|
||||
if (input != STDIN_FILENO)
|
||||
(void)close(input);
|
||||
return(buf);
|
||||
}
|
||||
|
||||
char *
|
||||
getpass(prompt)
|
||||
const char *prompt;
|
||||
{
|
||||
static char buf[_PASSWORD_LEN + 1];
|
||||
|
||||
return(readpassphrase(prompt, buf, sizeof(buf), RPP_ECHO_OFF));
|
||||
}
|
Loading…
Reference in New Issue
Block a user