497 lines
11 KiB
C
497 lines
11 KiB
C
/* crypto/des/read_pwd.c */
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/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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* All rights reserved.
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*
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* This package is an SSL implementation written
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* by Eric Young (eay@cryptsoft.com).
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* The implementation was written so as to conform with Netscapes SSL.
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*
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* This library is free for commercial and non-commercial use as long as
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* the following conditions are aheared to. The following conditions
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* apply to all code found in this distribution, be it the RC4, RSA,
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* lhash, DES, etc., code; not just the SSL code. The SSL documentation
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* included with this distribution is covered by the same copyright terms
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* except that the holder is Tim Hudson (tjh@cryptsoft.com).
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*
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* Copyright remains Eric Young's, and as such any Copyright notices in
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* the code are not to be removed.
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* If this package is used in a product, Eric Young should be given attribution
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* as the author of the parts of the library used.
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* This can be in the form of a textual message at program startup or
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* in documentation (online or textual) provided with the package.
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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 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 cryptographic software written by
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* Eric Young (eay@cryptsoft.com)"
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* The word 'cryptographic' can be left out if the rouines from the library
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* being used are not cryptographic related :-).
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* 4. If you include any Windows specific code (or a derivative thereof) from
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* the apps directory (application code) you must include an acknowledgement:
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* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
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*
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* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``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 AUTHOR 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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* The licence and distribution terms for any publically available version or
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* derivative of this code cannot be changed. i.e. this code cannot simply be
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* copied and put under another distribution licence
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* [including the GNU Public Licence.]
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*/
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#if !defined(MSDOS) && !defined(VMS) && !defined(WIN32)
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#include <openssl/opensslconf.h>
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#ifdef OPENSSL_UNISTD
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# include OPENSSL_UNISTD
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#else
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# include <unistd.h>
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#endif
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/* If unistd.h defines _POSIX_VERSION, we conclude that we
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* are on a POSIX system and have sigaction and termios. */
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#if defined(_POSIX_VERSION)
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# define SIGACTION
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# if !defined(TERMIOS) && !defined(TERMIO) && !defined(SGTTY)
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# define TERMIOS
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# endif
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#endif
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#endif
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/* #define SIGACTION */ /* Define this if you have sigaction() */
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#ifdef WIN16TTY
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#undef WIN16
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#undef _WINDOWS
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#include <graph.h>
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#endif
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/* 06-Apr-92 Luke Brennan Support for VMS */
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#include "des_locl.h"
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#include "cryptlib.h"
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#include <signal.h>
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#include <stdio.h>
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#include <string.h>
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#include <setjmp.h>
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#include <errno.h>
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#ifdef VMS /* prototypes for sys$whatever */
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#include <starlet.h>
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#ifdef __DECC
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#pragma message disable DOLLARID
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#endif
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#endif
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#ifdef WIN_CONSOLE_BUG
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#include <windows.h>
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#include <wincon.h>
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#endif
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/* There are 5 types of terminal interface supported,
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* TERMIO, TERMIOS, VMS, MSDOS and SGTTY
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*/
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#if defined(__sgi) && !defined(TERMIOS)
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#define TERMIOS
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#undef TERMIO
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#undef SGTTY
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#endif
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#if defined(linux) && !defined(TERMIO)
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#undef TERMIOS
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#define TERMIO
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#undef SGTTY
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#endif
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#ifdef _LIBC
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#undef TERMIOS
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#define TERMIO
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#undef SGTTY
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#endif
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#if !defined(TERMIO) && !defined(TERMIOS) && !defined(VMS) && !defined(MSDOS) && !defined(MAC_OS_pre_X) && !defined(MAC_OS_GUSI_SOURCE)
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#undef TERMIOS
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#undef TERMIO
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#define SGTTY
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#endif
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#ifdef TERMIOS
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#include <termios.h>
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#define TTY_STRUCT struct termios
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#define TTY_FLAGS c_lflag
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#define TTY_get(tty,data) tcgetattr(tty,data)
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#define TTY_set(tty,data) tcsetattr(tty,TCSANOW,data)
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#endif
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#ifdef TERMIO
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#include <termio.h>
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#define TTY_STRUCT struct termio
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#define TTY_FLAGS c_lflag
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#define TTY_get(tty,data) ioctl(tty,TCGETA,data)
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#define TTY_set(tty,data) ioctl(tty,TCSETA,data)
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#endif
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#ifdef SGTTY
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#include <sgtty.h>
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#define TTY_STRUCT struct sgttyb
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#define TTY_FLAGS sg_flags
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#define TTY_get(tty,data) ioctl(tty,TIOCGETP,data)
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#define TTY_set(tty,data) ioctl(tty,TIOCSETP,data)
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#endif
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#if !defined(_LIBC) && !defined(MSDOS) && !defined(VMS) && !defined(MAC_OS_pre_X)
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#include <sys/ioctl.h>
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#endif
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#ifdef MSDOS
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#include <conio.h>
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#define fgets(a,b,c) noecho_fgets(a,b,c)
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#endif
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#ifdef VMS
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#include <ssdef.h>
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#include <iodef.h>
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#include <ttdef.h>
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#include <descrip.h>
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struct IOSB {
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short iosb$w_value;
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short iosb$w_count;
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long iosb$l_info;
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};
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#endif
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#if defined(MAC_OS_pre_X) || defined(MAC_OS_GUSI_SOURCE)
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/*
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* This one needs work. As a matter of fact the code is unoperational
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* and this is only a trick to get it compiled.
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* <appro@fy.chalmers.se>
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*/
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#define TTY_STRUCT int
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#endif
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#ifndef NX509_SIG
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#define NX509_SIG 32
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#endif
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static void read_till_nl(FILE *);
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static void recsig(int);
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static void pushsig(void);
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static void popsig(void);
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#if defined(MSDOS) && !defined(WIN16)
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static int noecho_fgets(char *buf, int size, FILE *tty);
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#endif
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#ifdef SIGACTION
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static struct sigaction savsig[NX509_SIG];
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#else
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static void (*savsig[NX509_SIG])(int );
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#endif
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static jmp_buf save;
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int des_read_pw_string(char *buf, int length, const char *prompt,
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int verify)
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{
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char buff[BUFSIZ];
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int ret;
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ret=des_read_pw(buf,buff,(length>BUFSIZ)?BUFSIZ:length,prompt,verify);
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memset(buff,0,BUFSIZ);
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return(ret);
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}
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#ifndef WIN16
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static void read_till_nl(FILE *in)
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{
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#define SIZE 4
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char buf[SIZE+1];
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do {
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fgets(buf,SIZE,in);
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} while (strchr(buf,'\n') == NULL);
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}
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/* return 0 if ok, 1 (or -1) otherwise */
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int des_read_pw(char *buf, char *buff, int size, const char *prompt,
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int verify)
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{
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#ifdef VMS
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struct IOSB iosb;
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$DESCRIPTOR(terminal,"TT");
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long tty_orig[3], tty_new[3];
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long status;
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unsigned short channel = 0;
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#else
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#ifndef MSDOS
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TTY_STRUCT tty_orig,tty_new;
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#endif
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#endif
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int number;
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int ok;
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/* statics are simply to avoid warnings about longjmp clobbering
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things */
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static int ps;
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int is_a_tty;
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static FILE *tty;
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char *p;
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if (setjmp(save))
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{
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ok=0;
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goto error;
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}
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number=5;
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ok=0;
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ps=0;
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is_a_tty=1;
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tty=NULL;
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#ifndef MSDOS
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if ((tty=fopen("/dev/tty","r")) == NULL)
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tty=stdin;
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#else /* MSDOS */
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if ((tty=fopen("con","r")) == NULL)
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tty=stdin;
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#endif /* MSDOS */
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#if defined(TTY_get) && !defined(VMS)
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if (TTY_get(fileno(tty),&tty_orig) == -1)
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{
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#ifdef ENOTTY
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if (errno == ENOTTY)
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is_a_tty=0;
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else
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#endif
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#ifdef EINVAL
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/* Ariel Glenn ariel@columbia.edu reports that solaris
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* can return EINVAL instead. This should be ok */
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if (errno == EINVAL)
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is_a_tty=0;
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else
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#endif
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return(-1);
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}
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memcpy(&(tty_new),&(tty_orig),sizeof(tty_orig));
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#endif
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#ifdef VMS
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status = sys$assign(&terminal,&channel,0,0);
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if (status != SS$_NORMAL)
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return(-1);
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status=sys$qiow(0,channel,IO$_SENSEMODE,&iosb,0,0,tty_orig,12,0,0,0,0);
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if ((status != SS$_NORMAL) || (iosb.iosb$w_value != SS$_NORMAL))
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return(-1);
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#endif
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pushsig();
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ps=1;
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#ifdef TTY_FLAGS
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tty_new.TTY_FLAGS &= ~ECHO;
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#endif
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#if defined(TTY_set) && !defined(VMS)
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if (is_a_tty && (TTY_set(fileno(tty),&tty_new) == -1))
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return(-1);
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#endif
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#ifdef VMS
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tty_new[0] = tty_orig[0];
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tty_new[1] = tty_orig[1] | TT$M_NOECHO;
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tty_new[2] = tty_orig[2];
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status = sys$qiow(0,channel,IO$_SETMODE,&iosb,0,0,tty_new,12,0,0,0,0);
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if ((status != SS$_NORMAL) || (iosb.iosb$w_value != SS$_NORMAL))
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return(-1);
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#endif
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ps=2;
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while ((!ok) && (number--))
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{
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fputs(prompt,stderr);
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fflush(stderr);
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buf[0]='\0';
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fgets(buf,size,tty);
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if (feof(tty)) goto error;
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if (ferror(tty)) goto error;
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if ((p=(char *)strchr(buf,'\n')) != NULL)
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*p='\0';
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else read_till_nl(tty);
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if (verify)
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{
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fprintf(stderr,"\nVerifying password - %s",prompt);
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fflush(stderr);
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buff[0]='\0';
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fgets(buff,size,tty);
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if (feof(tty)) goto error;
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if ((p=(char *)strchr(buff,'\n')) != NULL)
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*p='\0';
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else read_till_nl(tty);
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if (strcmp(buf,buff) != 0)
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{
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fprintf(stderr,"\nVerify failure");
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fflush(stderr);
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break;
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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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error:
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fprintf(stderr,"\n");
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#ifdef DEBUG
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perror("fgets(tty)");
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#endif
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/* What can we do if there is an error? */
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#if defined(TTY_set) && !defined(VMS)
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if (ps >= 2) TTY_set(fileno(tty),&tty_orig);
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#endif
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#ifdef VMS
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if (ps >= 2)
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status = sys$qiow(0,channel,IO$_SETMODE,&iosb,0,0
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,tty_orig,12,0,0,0,0);
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#endif
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if (ps >= 1) popsig();
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if (stdin != tty) fclose(tty);
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#ifdef VMS
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status = sys$dassgn(channel);
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#endif
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return(!ok);
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}
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#else /* WIN16 */
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int des_read_pw(char *buf, char *buff, int size, char *prompt, int verify)
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{
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memset(buf,0,size);
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memset(buff,0,size);
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return(0);
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}
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#endif
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static void pushsig(void)
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{
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int i;
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#ifdef SIGACTION
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struct sigaction sa;
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memset(&sa,0,sizeof sa);
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sa.sa_handler=recsig;
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#endif
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for (i=1; i<NX509_SIG; i++)
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{
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#ifdef SIGUSR1
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if (i == SIGUSR1)
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continue;
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#endif
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#ifdef SIGUSR2
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if (i == SIGUSR2)
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continue;
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#endif
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#ifdef SIGACTION
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sigaction(i,&sa,&savsig[i]);
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#else
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savsig[i]=signal(i,recsig);
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#endif
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}
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#ifdef SIGWINCH
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signal(SIGWINCH,SIG_DFL);
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#endif
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}
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static void popsig(void)
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{
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int i;
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for (i=1; i<NX509_SIG; i++)
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{
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#ifdef SIGUSR1
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if (i == SIGUSR1)
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continue;
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#endif
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#ifdef SIGUSR2
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if (i == SIGUSR2)
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continue;
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#endif
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#ifdef SIGACTION
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sigaction(i,&savsig[i],NULL);
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#else
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signal(i,savsig[i]);
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#endif
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}
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}
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static void recsig(int i)
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{
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longjmp(save,1);
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#ifdef LINT
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i=i;
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#endif
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}
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#if defined(MSDOS) && !defined(WIN16)
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static int noecho_fgets(char *buf, int size, FILE *tty)
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{
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int i;
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char *p;
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p=buf;
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for (;;)
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{
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if (size == 0)
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{
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*p='\0';
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break;
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}
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size--;
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#ifdef WIN16TTY
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i=_inchar();
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#else
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i=getch();
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#endif
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if (i == '\r') i='\n';
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*(p++)=i;
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if (i == '\n')
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{
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*p='\0';
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break;
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}
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}
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#ifdef WIN_CONSOLE_BUG
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/* Win95 has several evil console bugs: one of these is that the
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* last character read using getch() is passed to the next read: this is
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* usually a CR so this can be trouble. No STDIO fix seems to work but
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* flushing the console appears to do the trick.
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*/
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{
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HANDLE inh;
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inh = GetStdHandle(STD_INPUT_HANDLE);
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FlushConsoleInputBuffer(inh);
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}
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#endif
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return(strlen(buf));
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}
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#endif
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