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openssl/crypto/ui/ui_openssl.c
Richard Levitte caa7b2ad4f tty_in will never be stderr, so it will always be closed, which means stdin 
might get closed...
Reported by Mark Daniel <Mark.Daniel@wasd.vsm.com.au>
2003-01-13 13:15:16 +00:00

674 lines
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/* crypto/ui/ui_openssl.c -*- mode:C; c-file-style: "eay" -*- */
/* Written by Richard Levitte (richard@levitte.org) and others
* for the OpenSSL project 2001.
*/
/* ====================================================================
* Copyright (c) 2001 The OpenSSL Project. All rights reserved.
*
* 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. All advertising materials mentioning features or use of this
* software must display the following acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
*
* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
* endorse or promote products derived from this software without
* prior written permission. For written permission, please contact
* openssl-core@openssl.org.
*
* 5. Products derived from this software may not be called "OpenSSL"
* nor may "OpenSSL" appear in their names without prior written
* permission of the OpenSSL Project.
*
* 6. Redistributions of any form whatsoever must retain the following
* acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit (http://www.openssl.org/)"
*
* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
* EXPRESSED 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 OpenSSL PROJECT OR
* ITS CONTRIBUTORS 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.
* ====================================================================
*
* This product includes cryptographic software written by Eric Young
* (eay@cryptsoft.com). This product includes software written by Tim
* Hudson (tjh@cryptsoft.com).
*
*/
/* The lowest level part of this file was previously in crypto/des/read_pwd.c,
* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
* All rights reserved.
*
* This package is an SSL implementation written
* by Eric Young (eay@cryptsoft.com).
* The implementation was written so as to conform with Netscapes SSL.
*
* This library is free for commercial and non-commercial use as long as
* the following conditions are aheared to. The following conditions
* apply to all code found in this distribution, be it the RC4, RSA,
* lhash, DES, etc., code; not just the SSL code. The SSL documentation
* included with this distribution is covered by the same copyright terms
* except that the holder is Tim Hudson (tjh@cryptsoft.com).
*
* Copyright remains Eric Young's, and as such any Copyright notices in
* the code are not to be removed.
* If this package is used in a product, Eric Young should be given attribution
* as the author of the parts of the library used.
* This can be in the form of a textual message at program startup or
* in documentation (online or textual) provided with the package.
*
* 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 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* "This product includes cryptographic software written by
* Eric Young (eay@cryptsoft.com)"
* The word 'cryptographic' can be left out if the rouines from the library
* being used are not cryptographic related :-).
* 4. If you include any Windows specific code (or a derivative thereof) from
* the apps directory (application code) you must include an acknowledgement:
* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
*
* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``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 OR CONTRIBUTORS 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.
*
* The licence and distribution terms for any publically available version or
* derivative of this code cannot be changed. i.e. this code cannot simply be
* copied and put under another distribution licence
* [including the GNU Public Licence.]
*/
#include <openssl/e_os2.h>
#if !defined(OPENSSL_SYS_MSDOS) && !defined(OPENSSL_SYS_VMS)
# ifdef OPENSSL_UNISTD
# include OPENSSL_UNISTD
# else
# include <unistd.h>
# endif
/* If unistd.h defines _POSIX_VERSION, we conclude that we
* are on a POSIX system and have sigaction and termios. */
# if defined(_POSIX_VERSION)
# define SIGACTION
# if !defined(TERMIOS) && !defined(TERMIO) && !defined(SGTTY)
# define TERMIOS
# endif
# endif
#endif
#ifdef WIN16TTY
# undef OPENSSL_SYS_WIN16
# undef WIN16
# undef _WINDOWS
# include <graph.h>
#endif
/* 06-Apr-92 Luke Brennan Support for VMS */
#include "ui_locl.h"
#include "cryptlib.h"
#include <signal.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#ifdef OPENSSL_SYS_VMS /* prototypes for sys$whatever */
# include <starlet.h>
# ifdef __DECC
# pragma message disable DOLLARID
# endif
#endif
#ifdef WIN_CONSOLE_BUG
# include <windows.h>
#ifndef OPENSSL_SYS_WINCE
# include <wincon.h>
#endif
#endif
/* There are 5 types of terminal interface supported,
* TERMIO, TERMIOS, VMS, MSDOS and SGTTY
*/
#if defined(__sgi) && !defined(TERMIOS)
# define TERMIOS
# undef TERMIO
# undef SGTTY
#endif
#if defined(linux) && !defined(TERMIO)
# undef TERMIOS
# define TERMIO
# undef SGTTY
#endif
#ifdef _LIBC
# undef TERMIOS
# define TERMIO
# undef SGTTY
#endif
#if !defined(TERMIO) && !defined(TERMIOS) && !defined(OPENSSL_SYS_VMS) && !defined(OPENSSL_SYS_MSDOS) && !defined(OPENSSL_SYS_MACINTOSH_CLASSIC) && !defined(MAC_OS_GUSI_SOURCE)
# undef TERMIOS
# undef TERMIO
# define SGTTY
#endif
#if defined(OPENSSL_SYS_VXWORKS)
#undef TERMIOS
#undef TERMIO
#undef SGTTY
#endif
#ifdef TERMIOS
# include <termios.h>
# define TTY_STRUCT struct termios
# define TTY_FLAGS c_lflag
# define TTY_get(tty,data) tcgetattr(tty,data)
# define TTY_set(tty,data) tcsetattr(tty,TCSANOW,data)
#endif
#ifdef TERMIO
# include <termio.h>
# define TTY_STRUCT struct termio
# define TTY_FLAGS c_lflag
# define TTY_get(tty,data) ioctl(tty,TCGETA,data)
# define TTY_set(tty,data) ioctl(tty,TCSETA,data)
#endif
#ifdef SGTTY
# include <sgtty.h>
# define TTY_STRUCT struct sgttyb
# define TTY_FLAGS sg_flags
# define TTY_get(tty,data) ioctl(tty,TIOCGETP,data)
# define TTY_set(tty,data) ioctl(tty,TIOCSETP,data)
#endif
#if !defined(_LIBC) && !defined(OPENSSL_SYS_MSDOS) && !defined(OPENSSL_SYS_VMS) && !defined(OPENSSL_SYS_MACINTOSH_CLASSIC) && !defined(OPENSSL_SYS_SUNOS)
# include <sys/ioctl.h>
#endif
#ifdef OPENSSL_SYS_MSDOS
# include <conio.h>
#endif
#ifdef OPENSSL_SYS_VMS
# include <ssdef.h>
# include <iodef.h>
# include <ttdef.h>
# include <descrip.h>
struct IOSB {
short iosb$w_value;
short iosb$w_count;
long iosb$l_info;
};
#endif
#ifdef OPENSSL_SYS_SUNOS
typedef int sig_atomic_t;
#endif
#if defined(OPENSSL_SYS_MACINTOSH_CLASSIC) || defined(MAC_OS_GUSI_SOURCE)
/*
* This one needs work. As a matter of fact the code is unoperational
* and this is only a trick to get it compiled.
* <appro@fy.chalmers.se>
*/
# define TTY_STRUCT int
#endif
#ifndef NX509_SIG
# define NX509_SIG 32
#endif
/* Define globals. They are protected by a lock */
#ifdef SIGACTION
static struct sigaction savsig[NX509_SIG];
#else
static void (*savsig[NX509_SIG])(int );
#endif
#ifdef OPENSSL_SYS_VMS
static struct IOSB iosb;
static $DESCRIPTOR(terminal,"TT");
static long tty_orig[3], tty_new[3]; /* XXX Is there any guarantee that this will always suffice for the actual structures? */
static long status;
static unsigned short channel = 0;
#else
#if !defined(OPENSSL_SYS_MSDOS) || defined(__DJGPP__)
static TTY_STRUCT tty_orig,tty_new;
#endif
#endif
static FILE *tty_in, *tty_out;
static int is_a_tty;
/* Declare static functions */
#if !defined(OPENSSL_SYS_WIN16) && !defined(OPENSSL_SYS_WINCE)
static void read_till_nl(FILE *);
static void recsig(int);
static void pushsig(void);
static void popsig(void);
#endif
#if defined(OPENSSL_SYS_MSDOS) && !defined(OPENSSL_SYS_WIN16)
static int noecho_fgets(char *buf, int size, FILE *tty);
#endif
static int read_string_inner(UI *ui, UI_STRING *uis, int echo, int strip_nl);
static int read_string(UI *ui, UI_STRING *uis);
static int write_string(UI *ui, UI_STRING *uis);
static int open_console(UI *ui);
static int echo_console(UI *ui);
static int noecho_console(UI *ui);
static int close_console(UI *ui);
static UI_METHOD ui_openssl =
{
"OpenSSL default user interface",
open_console,
write_string,
NULL, /* No flusher is needed for command lines */
read_string,
close_console,
NULL
};
/* The method with all the built-in thingies */
UI_METHOD *UI_OpenSSL(void)
{
return &ui_openssl;
}
/* The following function makes sure that info and error strings are printed
before any prompt. */
static int write_string(UI *ui, UI_STRING *uis)
{
switch (UI_get_string_type(uis))
{
case UIT_ERROR:
case UIT_INFO:
fputs(UI_get0_output_string(uis), tty_out);
fflush(tty_out);
break;
default:
break;
}
return 1;
}
static int read_string(UI *ui, UI_STRING *uis)
{
int ok = 0;
switch (UI_get_string_type(uis))
{
case UIT_BOOLEAN:
fputs(UI_get0_output_string(uis), tty_out);
fputs(UI_get0_action_string(uis), tty_out);
fflush(tty_out);
return read_string_inner(ui, uis,
UI_get_input_flags(uis) & UI_INPUT_FLAG_ECHO, 0);
case UIT_PROMPT:
fputs(UI_get0_output_string(uis), tty_out);
fflush(tty_out);
return read_string_inner(ui, uis,
UI_get_input_flags(uis) & UI_INPUT_FLAG_ECHO, 1);
case UIT_VERIFY:
fprintf(tty_out,"Verifying - %s",
UI_get0_output_string(uis));
fflush(tty_out);
if ((ok = read_string_inner(ui, uis,
UI_get_input_flags(uis) & UI_INPUT_FLAG_ECHO, 1)) <= 0)
return ok;
if (strcmp(UI_get0_result_string(uis),
UI_get0_test_string(uis)) != 0)
{
fprintf(tty_out,"Verify failure\n");
fflush(tty_out);
return 0;
}
break;
default:
break;
}
return 1;
}
#if !defined(OPENSSL_SYS_WIN16) && !defined(OPENSSL_SYS_WINCE)
/* Internal functions to read a string without echoing */
static void read_till_nl(FILE *in)
{
#define SIZE 4
char buf[SIZE+1];
do {
fgets(buf,SIZE,in);
} while (strchr(buf,'\n') == NULL);
}
static volatile sig_atomic_t intr_signal;
#endif
static int read_string_inner(UI *ui, UI_STRING *uis, int echo, int strip_nl)
{
static int ps;
int ok;
char result[BUFSIZ];
int maxsize = BUFSIZ-1;
#if !defined(OPENSSL_SYS_WIN16) && !defined(OPENSSL_SYS_WINCE)
char *p;
intr_signal=0;
ok=0;
ps=0;
pushsig();
ps=1;
if (!echo && !noecho_console(ui))
goto error;
ps=2;
result[0]='\0';
#ifdef OPENSSL_SYS_MSDOS
if (!echo)
{
noecho_fgets(result,maxsize,tty_in);
p=result; /* FIXME: noecho_fgets doesn't return errors */
}
else
p=fgets(result,maxsize,tty_in);
#else
p=fgets(result,maxsize,tty_in);
#endif
if(!p)
goto error;
if (feof(tty_in)) goto error;
if (ferror(tty_in)) goto error;
if ((p=(char *)strchr(result,'\n')) != NULL)
{
if (strip_nl)
*p='\0';
}
else
read_till_nl(tty_in);
if (UI_set_result(ui, uis, result) >= 0)
ok=1;
error:
if (intr_signal == SIGINT)
ok=-1;
if (!echo) fprintf(tty_out,"\n");
if (ps >= 2 && !echo && !echo_console(ui))
ok=0;
if (ps >= 1)
popsig();
#else
ok=1;
#endif
OPENSSL_cleanse(result,BUFSIZ);
return ok;
}
/* Internal functions to open, handle and close a channel to the console. */
static int open_console(UI *ui)
{
CRYPTO_w_lock(CRYPTO_LOCK_UI);
is_a_tty = 1;
#if defined(OPENSSL_SYS_MACINTOSH_CLASSIC) || defined(OPENSSL_SYS_VXWORKS)
tty_in=stdin;
tty_out=stderr;
#else
# ifdef OPENSSL_SYS_MSDOS
# define DEV_TTY "con"
# else
# define DEV_TTY "/dev/tty"
# endif
if ((tty_in=fopen(DEV_TTY,"r")) == NULL)
tty_in=stdin;
if ((tty_out=fopen(DEV_TTY,"w")) == NULL)
tty_out=stderr;
#endif
#if defined(TTY_get) && !defined(OPENSSL_SYS_VMS)
if (TTY_get(fileno(tty_in),&tty_orig) == -1)
{
#ifdef ENOTTY
if (errno == ENOTTY)
is_a_tty=0;
else
#endif
#ifdef EINVAL
/* Ariel Glenn ariel@columbia.edu reports that solaris
* can return EINVAL instead. This should be ok */
if (errno == EINVAL)
is_a_tty=0;
else
#endif
return 0;
}
#endif
#ifdef OPENSSL_SYS_VMS
status = sys$assign(&terminal,&channel,0,0);
if (status != SS$_NORMAL)
return 0;
status=sys$qiow(0,channel,IO$_SENSEMODE,&iosb,0,0,tty_orig,12,0,0,0,0);
if ((status != SS$_NORMAL) || (iosb.iosb$w_value != SS$_NORMAL))
return 0;
#endif
return 1;
}
static int noecho_console(UI *ui)
{
#ifdef TTY_FLAGS
memcpy(&(tty_new),&(tty_orig),sizeof(tty_orig));
tty_new.TTY_FLAGS &= ~ECHO;
#endif
#if defined(TTY_set) && !defined(OPENSSL_SYS_VMS)
if (is_a_tty && (TTY_set(fileno(tty_in),&tty_new) == -1))
return 0;
#endif
#ifdef OPENSSL_SYS_VMS
tty_new[0] = tty_orig[0];
tty_new[1] = tty_orig[1] | TT$M_NOECHO;
tty_new[2] = tty_orig[2];
status = sys$qiow(0,channel,IO$_SETMODE,&iosb,0,0,tty_new,12,0,0,0,0);
if ((status != SS$_NORMAL) || (iosb.iosb$w_value != SS$_NORMAL))
return 0;
#endif
return 1;
}
static int echo_console(UI *ui)
{
#if defined(TTY_set) && !defined(OPENSSL_SYS_VMS)
memcpy(&(tty_new),&(tty_orig),sizeof(tty_orig));
tty_new.TTY_FLAGS |= ECHO;
#endif
#if defined(TTY_set) && !defined(OPENSSL_SYS_VMS)
if (is_a_tty && (TTY_set(fileno(tty_in),&tty_new) == -1))
return 0;
#endif
#ifdef OPENSSL_SYS_VMS
tty_new[0] = tty_orig[0];
tty_new[1] = tty_orig[1] & ~TT$M_NOECHO;
tty_new[2] = tty_orig[2];
status = sys$qiow(0,channel,IO$_SETMODE,&iosb,0,0,tty_new,12,0,0,0,0);
if ((status != SS$_NORMAL) || (iosb.iosb$w_value != SS$_NORMAL))
return 0;
#endif
return 1;
}
static int close_console(UI *ui)
{
if (tty_in != stdin) fclose(tty_in);
if (tty_out != stderr) fclose(tty_out);
#ifdef OPENSSL_SYS_VMS
status = sys$dassgn(channel);
#endif
CRYPTO_w_unlock(CRYPTO_LOCK_UI);
return 1;
}
#if !defined(OPENSSL_SYS_WIN16) && !defined(OPENSSL_SYS_WINCE)
/* Internal functions to handle signals and act on them */
static void pushsig(void)
{
int i;
#ifdef SIGACTION
struct sigaction sa;
memset(&sa,0,sizeof sa);
sa.sa_handler=recsig;
#endif
for (i=1; i<NX509_SIG; i++)
{
#ifdef SIGUSR1
if (i == SIGUSR1)
continue;
#endif
#ifdef SIGUSR2
if (i == SIGUSR2)
continue;
#endif
#ifdef SIGKILL
if (i == SIGKILL) /* We can't make any action on that. */
continue;
#endif
#ifdef SIGACTION
sigaction(i,&sa,&savsig[i]);
#else
savsig[i]=signal(i,recsig);
#endif
}
#ifdef SIGWINCH
signal(SIGWINCH,SIG_DFL);
#endif
}
static void popsig(void)
{
int i;
for (i=1; i<NX509_SIG; i++)
{
#ifdef SIGUSR1
if (i == SIGUSR1)
continue;
#endif
#ifdef SIGUSR2
if (i == SIGUSR2)
continue;
#endif
#ifdef SIGACTION
sigaction(i,&savsig[i],NULL);
#else
signal(i,savsig[i]);
#endif
}
}
static void recsig(int i)
{
intr_signal=i;
}
#endif
/* Internal functions specific for Windows */
#if defined(OPENSSL_SYS_MSDOS) && !defined(OPENSSL_SYS_WIN16) && !defined(OPENSSL_SYS_WINCE)
static int noecho_fgets(char *buf, int size, FILE *tty)
{
int i;
char *p;
p=buf;
for (;;)
{
if (size == 0)
{
*p='\0';
break;
}
size--;
#ifdef WIN16TTY
i=_inchar();
#else
i=getch();
#endif
if (i == '\r') i='\n';
*(p++)=i;
if (i == '\n')
{
*p='\0';
break;
}
}
#ifdef WIN_CONSOLE_BUG
/* Win95 has several evil console bugs: one of these is that the
* last character read using getch() is passed to the next read: this is
* usually a CR so this can be trouble. No STDIO fix seems to work but
* flushing the console appears to do the trick.
*/
{
HANDLE inh;
inh = GetStdHandle(STD_INPUT_HANDLE);
FlushConsoleInputBuffer(inh);
}
#endif
return(strlen(buf));
}
#endif
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