xref: /openbsd-src/lib/libcrypto/ui/ui_openssl.c (revision a28daedfc357b214be5c701aa8ba8adb29a7f1c2)
1 /* crypto/ui/ui_openssl.c -*- mode:C; c-file-style: "eay" -*- */
2 /* Written by Richard Levitte (richard@levitte.org) and others
3  * for the OpenSSL project 2001.
4  */
5 /* ====================================================================
6  * Copyright (c) 2001 The OpenSSL Project.  All rights reserved.
7  *
8  * Redistribution and use in source and binary forms, with or without
9  * modification, are permitted provided that the following conditions
10  * are met:
11  *
12  * 1. Redistributions of source code must retain the above copyright
13  *    notice, this list of conditions and the following disclaimer.
14  *
15  * 2. Redistributions in binary form must reproduce the above copyright
16  *    notice, this list of conditions and the following disclaimer in
17  *    the documentation and/or other materials provided with the
18  *    distribution.
19  *
20  * 3. All advertising materials mentioning features or use of this
21  *    software must display the following acknowledgment:
22  *    "This product includes software developed by the OpenSSL Project
23  *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
24  *
25  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
26  *    endorse or promote products derived from this software without
27  *    prior written permission. For written permission, please contact
28  *    openssl-core@openssl.org.
29  *
30  * 5. Products derived from this software may not be called "OpenSSL"
31  *    nor may "OpenSSL" appear in their names without prior written
32  *    permission of the OpenSSL Project.
33  *
34  * 6. Redistributions of any form whatsoever must retain the following
35  *    acknowledgment:
36  *    "This product includes software developed by the OpenSSL Project
37  *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
38  *
39  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
40  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
43  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
48  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50  * OF THE POSSIBILITY OF SUCH DAMAGE.
51  * ====================================================================
52  *
53  * This product includes cryptographic software written by Eric Young
54  * (eay@cryptsoft.com).  This product includes software written by Tim
55  * Hudson (tjh@cryptsoft.com).
56  *
57  */
58 
59 /* The lowest level part of this file was previously in crypto/des/read_pwd.c,
60  * Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
61  * All rights reserved.
62  *
63  * This package is an SSL implementation written
64  * by Eric Young (eay@cryptsoft.com).
65  * The implementation was written so as to conform with Netscapes SSL.
66  *
67  * This library is free for commercial and non-commercial use as long as
68  * the following conditions are aheared to.  The following conditions
69  * apply to all code found in this distribution, be it the RC4, RSA,
70  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
71  * included with this distribution is covered by the same copyright terms
72  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
73  *
74  * Copyright remains Eric Young's, and as such any Copyright notices in
75  * the code are not to be removed.
76  * If this package is used in a product, Eric Young should be given attribution
77  * as the author of the parts of the library used.
78  * This can be in the form of a textual message at program startup or
79  * in documentation (online or textual) provided with the package.
80  *
81  * Redistribution and use in source and binary forms, with or without
82  * modification, are permitted provided that the following conditions
83  * are met:
84  * 1. Redistributions of source code must retain the copyright
85  *    notice, this list of conditions and the following disclaimer.
86  * 2. Redistributions in binary form must reproduce the above copyright
87  *    notice, this list of conditions and the following disclaimer in the
88  *    documentation and/or other materials provided with the distribution.
89  * 3. All advertising materials mentioning features or use of this software
90  *    must display the following acknowledgement:
91  *    "This product includes cryptographic software written by
92  *     Eric Young (eay@cryptsoft.com)"
93  *    The word 'cryptographic' can be left out if the rouines from the library
94  *    being used are not cryptographic related :-).
95  * 4. If you include any Windows specific code (or a derivative thereof) from
96  *    the apps directory (application code) you must include an acknowledgement:
97  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
98  *
99  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
100  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
101  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
102  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
103  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
104  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
105  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
106  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
107  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
108  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
109  * SUCH DAMAGE.
110  *
111  * The licence and distribution terms for any publically available version or
112  * derivative of this code cannot be changed.  i.e. this code cannot simply be
113  * copied and put under another distribution licence
114  * [including the GNU Public Licence.]
115  */
116 
117 
118 #include <openssl/e_os2.h>
119 
120 /* need for #define _POSIX_C_SOURCE arises whenever you pass -ansi to gcc
121  * [maybe others?], because it masks interfaces not discussed in standard,
122  * sigaction and fileno included. -pedantic would be more appropriate for
123  * the intended purposes, but we can't prevent users from adding -ansi.
124  */
125 #define _POSIX_C_SOURCE 1
126 #include <signal.h>
127 #include <stdio.h>
128 #include <string.h>
129 #include <errno.h>
130 
131 #if !defined(OPENSSL_SYS_MSDOS) && !defined(OPENSSL_SYS_VMS)
132 # ifdef OPENSSL_UNISTD
133 #  include OPENSSL_UNISTD
134 # else
135 #  include <unistd.h>
136 # endif
137 /* If unistd.h defines _POSIX_VERSION, we conclude that we
138  * are on a POSIX system and have sigaction and termios. */
139 # if defined(_POSIX_VERSION)
140 
141 #  define SIGACTION
142 #  if !defined(TERMIOS) && !defined(TERMIO) && !defined(SGTTY)
143 #   define TERMIOS
144 #  endif
145 
146 # endif
147 #endif
148 
149 #ifdef WIN16TTY
150 # undef OPENSSL_SYS_WIN16
151 # undef WIN16
152 # undef _WINDOWS
153 # include <graph.h>
154 #endif
155 
156 /* 06-Apr-92 Luke Brennan    Support for VMS */
157 #include "ui_locl.h"
158 #include "cryptlib.h"
159 
160 #ifdef OPENSSL_SYS_VMS		/* prototypes for sys$whatever */
161 # include <starlet.h>
162 # ifdef __DECC
163 #  pragma message disable DOLLARID
164 # endif
165 #endif
166 
167 #ifdef WIN_CONSOLE_BUG
168 # include <windows.h>
169 #ifndef OPENSSL_SYS_WINCE
170 # include <wincon.h>
171 #endif
172 #endif
173 
174 
175 /* There are 5 types of terminal interface supported,
176  * TERMIO, TERMIOS, VMS, MSDOS and SGTTY
177  */
178 
179 #if defined(__sgi) && !defined(TERMIOS)
180 # define TERMIOS
181 # undef  TERMIO
182 # undef  SGTTY
183 #endif
184 
185 #if defined(linux) && !defined(TERMIO)
186 # undef  TERMIOS
187 # define TERMIO
188 # undef  SGTTY
189 #endif
190 
191 #ifdef _LIBC
192 # undef  TERMIOS
193 # define TERMIO
194 # undef  SGTTY
195 #endif
196 
197 #if !defined(TERMIO) && !defined(TERMIOS) && !defined(OPENSSL_SYS_VMS) && !defined(OPENSSL_SYS_MSDOS) && !defined(OPENSSL_SYS_MACINTOSH_CLASSIC) && !defined(MAC_OS_GUSI_SOURCE)
198 # undef  TERMIOS
199 # undef  TERMIO
200 # define SGTTY
201 #endif
202 
203 #if defined(OPENSSL_SYS_VXWORKS)
204 #undef TERMIOS
205 #undef TERMIO
206 #undef SGTTY
207 #endif
208 
209 #if defined(OPENSSL_SYS_NETWARE)
210 #undef TERMIOS
211 #undef TERMIO
212 #undef SGTTY
213 #endif
214 
215 #ifdef TERMIOS
216 # include <termios.h>
217 # define TTY_STRUCT		struct termios
218 # define TTY_FLAGS		c_lflag
219 # define TTY_get(tty,data)	tcgetattr(tty,data)
220 # define TTY_set(tty,data)	tcsetattr(tty,TCSANOW,data)
221 #endif
222 
223 #ifdef TERMIO
224 # include <termio.h>
225 # define TTY_STRUCT		struct termio
226 # define TTY_FLAGS		c_lflag
227 # define TTY_get(tty,data)	ioctl(tty,TCGETA,data)
228 # define TTY_set(tty,data)	ioctl(tty,TCSETA,data)
229 #endif
230 
231 #ifdef SGTTY
232 # include <sgtty.h>
233 # define TTY_STRUCT		struct sgttyb
234 # define TTY_FLAGS		sg_flags
235 # define TTY_get(tty,data)	ioctl(tty,TIOCGETP,data)
236 # define TTY_set(tty,data)	ioctl(tty,TIOCSETP,data)
237 #endif
238 
239 #if !defined(_LIBC) && !defined(OPENSSL_SYS_MSDOS) && !defined(OPENSSL_SYS_VMS) && !defined(OPENSSL_SYS_MACINTOSH_CLASSIC) && !defined(OPENSSL_SYS_SUNOS)
240 # include <sys/ioctl.h>
241 #endif
242 
243 #ifdef OPENSSL_SYS_MSDOS
244 # include <conio.h>
245 #endif
246 
247 #ifdef OPENSSL_SYS_VMS
248 # include <ssdef.h>
249 # include <iodef.h>
250 # include <ttdef.h>
251 # include <descrip.h>
252 struct IOSB {
253 	short iosb$w_value;
254 	short iosb$w_count;
255 	long  iosb$l_info;
256 	};
257 #endif
258 
259 #ifdef OPENSSL_SYS_SUNOS
260 	typedef int sig_atomic_t;
261 #endif
262 
263 #if defined(OPENSSL_SYS_MACINTOSH_CLASSIC) || defined(MAC_OS_GUSI_SOURCE) || defined(OPENSSL_SYS_NETWARE)
264 /*
265  * This one needs work. As a matter of fact the code is unoperational
266  * and this is only a trick to get it compiled.
267  *					<appro@fy.chalmers.se>
268  */
269 # define TTY_STRUCT int
270 #endif
271 
272 #ifndef NX509_SIG
273 # define NX509_SIG 32
274 #endif
275 
276 
277 /* Define globals.  They are protected by a lock */
278 #ifdef SIGACTION
279 static struct sigaction savsig[NX509_SIG];
280 #else
281 static void (*savsig[NX509_SIG])(int );
282 #endif
283 
284 #ifdef OPENSSL_SYS_VMS
285 static struct IOSB iosb;
286 static $DESCRIPTOR(terminal,"TT");
287 static long tty_orig[3], tty_new[3]; /* XXX   Is there any guarantee that this will always suffice for the actual structures? */
288 static long status;
289 static unsigned short channel = 0;
290 #else
291 #if !defined(OPENSSL_SYS_MSDOS) || defined(__DJGPP__)
292 static TTY_STRUCT tty_orig,tty_new;
293 #endif
294 #endif
295 static FILE *tty_in, *tty_out;
296 static int is_a_tty;
297 
298 /* Declare static functions */
299 #if !defined(OPENSSL_SYS_WIN16) && !defined(OPENSSL_SYS_WINCE)
300 static void read_till_nl(FILE *);
301 static void recsig(int);
302 static void pushsig(void);
303 static void popsig(void);
304 #endif
305 #if defined(OPENSSL_SYS_MSDOS) && !defined(OPENSSL_SYS_WIN16)
306 static int noecho_fgets(char *buf, int size, FILE *tty);
307 #endif
308 static int read_string_inner(UI *ui, UI_STRING *uis, int echo, int strip_nl);
309 
310 static int read_string(UI *ui, UI_STRING *uis);
311 static int write_string(UI *ui, UI_STRING *uis);
312 
313 static int open_console(UI *ui);
314 static int echo_console(UI *ui);
315 static int noecho_console(UI *ui);
316 static int close_console(UI *ui);
317 
318 static UI_METHOD ui_openssl =
319 	{
320 	"OpenSSL default user interface",
321 	open_console,
322 	write_string,
323 	NULL,			/* No flusher is needed for command lines */
324 	read_string,
325 	close_console,
326 	NULL
327 	};
328 
329 /* The method with all the built-in thingies */
330 UI_METHOD *UI_OpenSSL(void)
331 	{
332 	return &ui_openssl;
333 	}
334 
335 /* The following function makes sure that info and error strings are printed
336    before any prompt. */
337 static int write_string(UI *ui, UI_STRING *uis)
338 	{
339 	switch (UI_get_string_type(uis))
340 		{
341 	case UIT_ERROR:
342 	case UIT_INFO:
343 		fputs(UI_get0_output_string(uis), tty_out);
344 		fflush(tty_out);
345 		break;
346 	default:
347 		break;
348 		}
349 	return 1;
350 	}
351 
352 static int read_string(UI *ui, UI_STRING *uis)
353 	{
354 	int ok = 0;
355 
356 	switch (UI_get_string_type(uis))
357 		{
358 	case UIT_BOOLEAN:
359 		fputs(UI_get0_output_string(uis), tty_out);
360 		fputs(UI_get0_action_string(uis), tty_out);
361 		fflush(tty_out);
362 		return read_string_inner(ui, uis,
363 			UI_get_input_flags(uis) & UI_INPUT_FLAG_ECHO, 0);
364 	case UIT_PROMPT:
365 		fputs(UI_get0_output_string(uis), tty_out);
366 		fflush(tty_out);
367 		return read_string_inner(ui, uis,
368 			UI_get_input_flags(uis) & UI_INPUT_FLAG_ECHO, 1);
369 	case UIT_VERIFY:
370 		fprintf(tty_out,"Verifying - %s",
371 			UI_get0_output_string(uis));
372 		fflush(tty_out);
373 		if ((ok = read_string_inner(ui, uis,
374 			UI_get_input_flags(uis) & UI_INPUT_FLAG_ECHO, 1)) <= 0)
375 			return ok;
376 		if (strcmp(UI_get0_result_string(uis),
377 			UI_get0_test_string(uis)) != 0)
378 			{
379 			fprintf(tty_out,"Verify failure\n");
380 			fflush(tty_out);
381 			return 0;
382 			}
383 		break;
384 	default:
385 		break;
386 		}
387 	return 1;
388 	}
389 
390 
391 #if !defined(OPENSSL_SYS_WIN16) && !defined(OPENSSL_SYS_WINCE)
392 /* Internal functions to read a string without echoing */
393 static void read_till_nl(FILE *in)
394 	{
395 #define SIZE 4
396 	char buf[SIZE+1];
397 
398 	do	{
399 		if (fgets(buf,sizeof(buf),in) == NULL)
400 			break;
401 		} while (strchr(buf,'\n') == NULL);
402 	}
403 
404 static volatile sig_atomic_t intr_signal;
405 #endif
406 
407 static int read_string_inner(UI *ui, UI_STRING *uis, int echo, int strip_nl)
408 	{
409 	static int ps;
410 	int ok;
411 	char result[BUFSIZ];
412 	int maxsize = BUFSIZ-1;
413 #if !defined(OPENSSL_SYS_WIN16) && !defined(OPENSSL_SYS_WINCE)
414 	char *p;
415 
416 	intr_signal=0;
417 	ok=0;
418 	ps=0;
419 
420 	pushsig();
421 	ps=1;
422 
423 	if (!echo && !noecho_console(ui))
424 		goto error;
425 	ps=2;
426 
427 	result[0]='\0';
428 #ifdef OPENSSL_SYS_MSDOS
429 	if (!echo)
430 		{
431 		noecho_fgets(result,maxsize,tty_in);
432 		p=result; /* FIXME: noecho_fgets doesn't return errors */
433 		}
434 	else
435 		p=fgets(result,maxsize,tty_in);
436 #else
437 	p=fgets(result,maxsize,tty_in);
438 #endif
439 	if(!p)
440 		goto error;
441 	if (feof(tty_in)) goto error;
442 	if (ferror(tty_in)) goto error;
443 	if ((p=(char *)strchr(result,'\n')) != NULL)
444 		{
445 		if (strip_nl)
446 			*p='\0';
447 		}
448 	else
449 		read_till_nl(tty_in);
450 	if (UI_set_result(ui, uis, result) >= 0)
451 		ok=1;
452 
453 error:
454 	if (intr_signal == SIGINT)
455 		ok=-1;
456 	if (!echo) fprintf(tty_out,"\n");
457 	if (ps >= 2 && !echo && !echo_console(ui))
458 		ok=0;
459 
460 	if (ps >= 1)
461 		popsig();
462 #else
463 	ok=1;
464 #endif
465 
466 	OPENSSL_cleanse(result,BUFSIZ);
467 	return ok;
468 	}
469 
470 
471 /* Internal functions to open, handle and close a channel to the console.  */
472 static int open_console(UI *ui)
473 	{
474 	CRYPTO_w_lock(CRYPTO_LOCK_UI);
475 	is_a_tty = 1;
476 
477 #if defined(OPENSSL_SYS_MACINTOSH_CLASSIC) || defined(OPENSSL_SYS_VXWORKS) || defined(OPENSSL_SYS_NETWARE)
478 	tty_in=stdin;
479 	tty_out=stderr;
480 #else
481 #  ifdef OPENSSL_SYS_MSDOS
482 #    define DEV_TTY "con"
483 #  else
484 #    define DEV_TTY "/dev/tty"
485 #  endif
486 	if ((tty_in=fopen(DEV_TTY,"r")) == NULL)
487 		tty_in=stdin;
488 	if ((tty_out=fopen(DEV_TTY,"w")) == NULL)
489 		tty_out=stderr;
490 #endif
491 
492 #if defined(TTY_get) && !defined(OPENSSL_SYS_VMS)
493  	if (TTY_get(fileno(tty_in),&tty_orig) == -1)
494 		{
495 #ifdef ENOTTY
496 		if (errno == ENOTTY)
497 			is_a_tty=0;
498 		else
499 #endif
500 #ifdef EINVAL
501 		/* Ariel Glenn ariel@columbia.edu reports that solaris
502 		 * can return EINVAL instead.  This should be ok */
503 		if (errno == EINVAL)
504 			is_a_tty=0;
505 		else
506 #endif
507 			return 0;
508 		}
509 #endif
510 #ifdef OPENSSL_SYS_VMS
511 	status = sys$assign(&terminal,&channel,0,0);
512 	if (status != SS$_NORMAL)
513 		return 0;
514 	status=sys$qiow(0,channel,IO$_SENSEMODE,&iosb,0,0,tty_orig,12,0,0,0,0);
515 	if ((status != SS$_NORMAL) || (iosb.iosb$w_value != SS$_NORMAL))
516 		return 0;
517 #endif
518 	return 1;
519 	}
520 
521 static int noecho_console(UI *ui)
522 	{
523 #ifdef TTY_FLAGS
524 	memcpy(&(tty_new),&(tty_orig),sizeof(tty_orig));
525 	tty_new.TTY_FLAGS &= ~ECHO;
526 #endif
527 
528 #if defined(TTY_set) && !defined(OPENSSL_SYS_VMS)
529 	if (is_a_tty && (TTY_set(fileno(tty_in),&tty_new) == -1))
530 		return 0;
531 #endif
532 #ifdef OPENSSL_SYS_VMS
533 	tty_new[0] = tty_orig[0];
534 	tty_new[1] = tty_orig[1] | TT$M_NOECHO;
535 	tty_new[2] = tty_orig[2];
536 	status = sys$qiow(0,channel,IO$_SETMODE,&iosb,0,0,tty_new,12,0,0,0,0);
537 	if ((status != SS$_NORMAL) || (iosb.iosb$w_value != SS$_NORMAL))
538 		return 0;
539 #endif
540 	return 1;
541 	}
542 
543 static int echo_console(UI *ui)
544 	{
545 #if defined(TTY_set) && !defined(OPENSSL_SYS_VMS)
546 	memcpy(&(tty_new),&(tty_orig),sizeof(tty_orig));
547 	tty_new.TTY_FLAGS |= ECHO;
548 #endif
549 
550 #if defined(TTY_set) && !defined(OPENSSL_SYS_VMS)
551 	if (is_a_tty && (TTY_set(fileno(tty_in),&tty_new) == -1))
552 		return 0;
553 #endif
554 #ifdef OPENSSL_SYS_VMS
555 	tty_new[0] = tty_orig[0];
556 	tty_new[1] = tty_orig[1] & ~TT$M_NOECHO;
557 	tty_new[2] = tty_orig[2];
558 	status = sys$qiow(0,channel,IO$_SETMODE,&iosb,0,0,tty_new,12,0,0,0,0);
559 	if ((status != SS$_NORMAL) || (iosb.iosb$w_value != SS$_NORMAL))
560 		return 0;
561 #endif
562 	return 1;
563 	}
564 
565 static int close_console(UI *ui)
566 	{
567 	if (tty_in != stdin) fclose(tty_in);
568 	if (tty_out != stderr) fclose(tty_out);
569 #ifdef OPENSSL_SYS_VMS
570 	status = sys$dassgn(channel);
571 #endif
572 	CRYPTO_w_unlock(CRYPTO_LOCK_UI);
573 
574 	return 1;
575 	}
576 
577 
578 #if !defined(OPENSSL_SYS_WIN16) && !defined(OPENSSL_SYS_WINCE)
579 /* Internal functions to handle signals and act on them */
580 static void pushsig(void)
581 	{
582 #ifndef OPENSSL_SYS_WIN32
583 	int i;
584 #endif
585 #ifdef SIGACTION
586 	struct sigaction sa;
587 
588 	memset(&sa,0,sizeof sa);
589 	sa.sa_handler=recsig;
590 #endif
591 
592 #ifdef OPENSSL_SYS_WIN32
593 	savsig[SIGABRT]=signal(SIGABRT,recsig);
594 	savsig[SIGFPE]=signal(SIGFPE,recsig);
595 	savsig[SIGILL]=signal(SIGILL,recsig);
596 	savsig[SIGINT]=signal(SIGINT,recsig);
597 	savsig[SIGSEGV]=signal(SIGSEGV,recsig);
598 	savsig[SIGTERM]=signal(SIGTERM,recsig);
599 #else
600 	for (i=1; i<NX509_SIG; i++)
601 		{
602 #ifdef SIGUSR1
603 		if (i == SIGUSR1)
604 			continue;
605 #endif
606 #ifdef SIGUSR2
607 		if (i == SIGUSR2)
608 			continue;
609 #endif
610 #ifdef SIGKILL
611 		if (i == SIGKILL) /* We can't make any action on that. */
612 			continue;
613 #endif
614 #ifdef SIGACTION
615 		sigaction(i,&sa,&savsig[i]);
616 #else
617 		savsig[i]=signal(i,recsig);
618 #endif
619 		}
620 #endif
621 
622 #ifdef SIGWINCH
623 	signal(SIGWINCH,SIG_DFL);
624 #endif
625 	}
626 
627 static void popsig(void)
628 	{
629 #ifdef OPENSSL_SYS_WIN32
630 	signal(SIGABRT,savsig[SIGABRT]);
631 	signal(SIGFPE,savsig[SIGFPE]);
632 	signal(SIGILL,savsig[SIGILL]);
633 	signal(SIGINT,savsig[SIGINT]);
634 	signal(SIGSEGV,savsig[SIGSEGV]);
635 	signal(SIGTERM,savsig[SIGTERM]);
636 #else
637 	int i;
638 	for (i=1; i<NX509_SIG; i++)
639 		{
640 #ifdef SIGUSR1
641 		if (i == SIGUSR1)
642 			continue;
643 #endif
644 #ifdef SIGUSR2
645 		if (i == SIGUSR2)
646 			continue;
647 #endif
648 #ifdef SIGACTION
649 		sigaction(i,&savsig[i],NULL);
650 #else
651 		signal(i,savsig[i]);
652 #endif
653 		}
654 #endif
655 	}
656 
657 static void recsig(int i)
658 	{
659 	intr_signal=i;
660 	}
661 #endif
662 
663 /* Internal functions specific for Windows */
664 #if defined(OPENSSL_SYS_MSDOS) && !defined(OPENSSL_SYS_WIN16) && !defined(OPENSSL_SYS_WINCE)
665 static int noecho_fgets(char *buf, int size, FILE *tty)
666 	{
667 	int i;
668 	char *p;
669 
670 	p=buf;
671 	for (;;)
672 		{
673 		if (size == 0)
674 			{
675 			*p='\0';
676 			break;
677 			}
678 		size--;
679 #ifdef WIN16TTY
680 		i=_inchar();
681 #elif defined(_WIN32)
682 		i=_getch();
683 #else
684 		i=getch();
685 #endif
686 		if (i == '\r') i='\n';
687 		*(p++)=i;
688 		if (i == '\n')
689 			{
690 			*p='\0';
691 			break;
692 			}
693 		}
694 #ifdef WIN_CONSOLE_BUG
695 /* Win95 has several evil console bugs: one of these is that the
696  * last character read using getch() is passed to the next read: this is
697  * usually a CR so this can be trouble. No STDIO fix seems to work but
698  * flushing the console appears to do the trick.
699  */
700 		{
701 			HANDLE inh;
702 			inh = GetStdHandle(STD_INPUT_HANDLE);
703 			FlushConsoleInputBuffer(inh);
704 		}
705 #endif
706 	return(strlen(buf));
707 	}
708 #endif
709