1 /*
2 * Copyright 2001-2022 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the OpenSSL license (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
8 */
9
10 #include "e_os.h"
11 #include <openssl/e_os2.h>
12 #include <openssl/err.h>
13 #include <openssl/ui.h>
14
15 #ifndef OPENSSL_NO_UI_CONSOLE
16 /*
17 * need for #define _POSIX_C_SOURCE arises whenever you pass -ansi to gcc
18 * [maybe others?], because it masks interfaces not discussed in standard,
19 * sigaction and fileno included. -pedantic would be more appropriate for the
20 * intended purposes, but we can't prevent users from adding -ansi.
21 */
22 # if defined(OPENSSL_SYS_VXWORKS)
23 # include <sys/types.h>
24 # endif
25
26 # if !defined(_POSIX_C_SOURCE) && defined(OPENSSL_SYS_VMS)
27 # ifndef _POSIX_C_SOURCE
28 # define _POSIX_C_SOURCE 2
29 # endif
30 # endif
31 # include <signal.h>
32 # include <stdio.h>
33 # include <string.h>
34 # include <errno.h>
35
36 # if !defined(OPENSSL_SYS_MSDOS) && !defined(OPENSSL_SYS_VMS)
37 # ifdef OPENSSL_UNISTD
38 # include OPENSSL_UNISTD
39 # else
40 # include <unistd.h>
41 # endif
42 /*
43 * If unistd.h defines _POSIX_VERSION, we conclude that we are on a POSIX
44 * system and have sigaction and termios.
45 */
46 # if defined(_POSIX_VERSION) && _POSIX_VERSION>=199309L
47
48 # define SIGACTION
49 # if !defined(TERMIOS) && !defined(TERMIO) && !defined(SGTTY)
50 # define TERMIOS
51 # endif
52
53 # endif
54 # endif
55
56 # include "ui_local.h"
57 # include "internal/cryptlib.h"
58
59 # ifdef OPENSSL_SYS_VMS /* prototypes for sys$whatever */
60 # include <starlet.h>
61 # ifdef __DECC
62 # pragma message disable DOLLARID
63 # endif
64 # endif
65
66 # ifdef WIN_CONSOLE_BUG
67 # include <windows.h>
68 # ifndef OPENSSL_SYS_WINCE
69 # include <wincon.h>
70 # endif
71 # endif
72
73 /*
74 * There are 6 types of terminal interface supported, TERMIO, TERMIOS, VMS,
75 * MSDOS, WIN32 Console and SGTTY.
76 *
77 * If someone defines one of the macros TERMIO, TERMIOS or SGTTY, it will
78 * remain respected. Otherwise, we default to TERMIOS except for a few
79 * systems that require something different.
80 *
81 * Note: we do not use SGTTY unless it's defined by the configuration. We
82 * may eventually opt to remove its use entirely.
83 */
84
85 # if !defined(TERMIOS) && !defined(TERMIO) && !defined(SGTTY)
86
87 # if defined(_LIBC)
88 # undef TERMIOS
89 # define TERMIO
90 # undef SGTTY
91 /*
92 * We know that VMS, MSDOS, VXWORKS, use entirely other mechanisms.
93 */
94 # elif !defined(OPENSSL_SYS_VMS) \
95 && !defined(OPENSSL_SYS_MSDOS) \
96 && !defined(OPENSSL_SYS_VXWORKS)
97 # define TERMIOS
98 # undef TERMIO
99 # undef SGTTY
100 # endif
101
102 # endif
103
104 # if defined(OPENSSL_SYS_VXWORKS)
105 # undef TERMIOS
106 # undef TERMIO
107 # undef SGTTY
108 # endif
109
110 # ifdef TERMIOS
111 # include <termios.h>
112 # define TTY_STRUCT struct termios
113 # define TTY_FLAGS c_lflag
114 # define TTY_get(tty,data) tcgetattr(tty,data)
115 # define TTY_set(tty,data) tcsetattr(tty,TCSANOW,data)
116 # endif
117
118 # ifdef TERMIO
119 # include <termio.h>
120 # define TTY_STRUCT struct termio
121 # define TTY_FLAGS c_lflag
122 # define TTY_get(tty,data) ioctl(tty,TCGETA,data)
123 # define TTY_set(tty,data) ioctl(tty,TCSETA,data)
124 # endif
125
126 # ifdef SGTTY
127 # include <sgtty.h>
128 # define TTY_STRUCT struct sgttyb
129 # define TTY_FLAGS sg_flags
130 # define TTY_get(tty,data) ioctl(tty,TIOCGETP,data)
131 # define TTY_set(tty,data) ioctl(tty,TIOCSETP,data)
132 # endif
133
134 # if !defined(_LIBC) && !defined(OPENSSL_SYS_MSDOS) && !defined(OPENSSL_SYS_VMS)
135 # include <sys/ioctl.h>
136 # endif
137
138 # ifdef OPENSSL_SYS_MSDOS
139 # include <conio.h>
140 # endif
141
142 # ifdef OPENSSL_SYS_VMS
143 # include <ssdef.h>
144 # include <iodef.h>
145 # include <ttdef.h>
146 # include <descrip.h>
147 struct IOSB {
148 short iosb$w_value;
149 short iosb$w_count;
150 long iosb$l_info;
151 };
152 # endif
153
154 # ifndef NX509_SIG
155 # define NX509_SIG 32
156 # endif
157
158 /* Define globals. They are protected by a lock */
159 # ifdef SIGACTION
160 static struct sigaction savsig[NX509_SIG];
161 # else
162 static void (*savsig[NX509_SIG]) (int);
163 # endif
164
165 # ifdef OPENSSL_SYS_VMS
166 static struct IOSB iosb;
167 static $DESCRIPTOR(terminal, "TT");
168 static long tty_orig[3], tty_new[3]; /* XXX Is there any guarantee that this
169 * will always suffice for the actual
170 * structures? */
171 static long status;
172 static unsigned short channel = 0;
173 # elif defined(_WIN32) && !defined(_WIN32_WCE)
174 static DWORD tty_orig, tty_new;
175 # else
176 # if !defined(OPENSSL_SYS_MSDOS) || defined(__DJGPP__)
177 static TTY_STRUCT tty_orig, tty_new;
178 # endif
179 # endif
180 static FILE *tty_in, *tty_out;
181 static int is_a_tty;
182
183 /* Declare static functions */
184 # if !defined(OPENSSL_SYS_WINCE)
185 static int read_till_nl(FILE *);
186 static void recsig(int);
187 static void pushsig(void);
188 static void popsig(void);
189 # endif
190 # if defined(OPENSSL_SYS_MSDOS) && !defined(_WIN32)
191 static int noecho_fgets(char *buf, int size, FILE *tty);
192 # endif
193 static int read_string_inner(UI *ui, UI_STRING *uis, int echo, int strip_nl);
194
195 static int read_string(UI *ui, UI_STRING *uis);
196 static int write_string(UI *ui, UI_STRING *uis);
197
198 static int open_console(UI *ui);
199 static int echo_console(UI *ui);
200 static int noecho_console(UI *ui);
201 static int close_console(UI *ui);
202
203 /*
204 * The following function makes sure that info and error strings are printed
205 * before any prompt.
206 */
write_string(UI * ui,UI_STRING * uis)207 static int write_string(UI *ui, UI_STRING *uis)
208 {
209 switch (UI_get_string_type(uis)) {
210 case UIT_ERROR:
211 case UIT_INFO:
212 fputs(UI_get0_output_string(uis), tty_out);
213 fflush(tty_out);
214 break;
215 case UIT_NONE:
216 case UIT_PROMPT:
217 case UIT_VERIFY:
218 case UIT_BOOLEAN:
219 break;
220 }
221 return 1;
222 }
223
read_string(UI * ui,UI_STRING * uis)224 static int read_string(UI *ui, UI_STRING *uis)
225 {
226 int ok = 0;
227
228 switch (UI_get_string_type(uis)) {
229 case UIT_BOOLEAN:
230 fputs(UI_get0_output_string(uis), tty_out);
231 fputs(UI_get0_action_string(uis), tty_out);
232 fflush(tty_out);
233 return read_string_inner(ui, uis,
234 UI_get_input_flags(uis) & UI_INPUT_FLAG_ECHO,
235 0);
236 case UIT_PROMPT:
237 fputs(UI_get0_output_string(uis), tty_out);
238 fflush(tty_out);
239 return read_string_inner(ui, uis,
240 UI_get_input_flags(uis) & UI_INPUT_FLAG_ECHO,
241 1);
242 case UIT_VERIFY:
243 fprintf(tty_out, "Verifying - %s", UI_get0_output_string(uis));
244 fflush(tty_out);
245 if ((ok = read_string_inner(ui, uis,
246 UI_get_input_flags(uis) &
247 UI_INPUT_FLAG_ECHO, 1)) <= 0)
248 return ok;
249 if (strcmp(UI_get0_result_string(uis), UI_get0_test_string(uis)) != 0) {
250 fprintf(tty_out, "Verify failure\n");
251 fflush(tty_out);
252 return 0;
253 }
254 break;
255 case UIT_NONE:
256 case UIT_INFO:
257 case UIT_ERROR:
258 break;
259 }
260 return 1;
261 }
262
263 # if !defined(OPENSSL_SYS_WINCE)
264 /* Internal functions to read a string without echoing */
read_till_nl(FILE * in)265 static int read_till_nl(FILE *in)
266 {
267 # define SIZE 4
268 char buf[SIZE + 1];
269
270 do {
271 if (!fgets(buf, SIZE, in))
272 return 0;
273 } while (strchr(buf, '\n') == NULL);
274 return 1;
275 }
276
277 static volatile sig_atomic_t intr_signal;
278 # endif
279
read_string_inner(UI * ui,UI_STRING * uis,int echo,int strip_nl)280 static int read_string_inner(UI *ui, UI_STRING *uis, int echo, int strip_nl)
281 {
282 static int ps;
283 int ok;
284 char result[BUFSIZ];
285 int maxsize = BUFSIZ - 1;
286 # if !defined(OPENSSL_SYS_WINCE)
287 char *p = NULL;
288 int echo_eol = !echo;
289
290 intr_signal = 0;
291 ok = 0;
292 ps = 0;
293
294 pushsig();
295 ps = 1;
296
297 if (!echo && !noecho_console(ui))
298 goto error;
299 ps = 2;
300
301 result[0] = '\0';
302 # if defined(_WIN32)
303 if (is_a_tty) {
304 DWORD numread;
305 # if defined(CP_UTF8)
306 if (GetEnvironmentVariableW(L"OPENSSL_WIN32_UTF8", NULL, 0) != 0) {
307 WCHAR wresult[BUFSIZ];
308
309 if (ReadConsoleW(GetStdHandle(STD_INPUT_HANDLE),
310 wresult, maxsize, &numread, NULL)) {
311 if (numread >= 2 &&
312 wresult[numread-2] == L'\r' &&
313 wresult[numread-1] == L'\n') {
314 wresult[numread-2] = L'\n';
315 numread--;
316 }
317 wresult[numread] = '\0';
318 if (WideCharToMultiByte(CP_UTF8, 0, wresult, -1,
319 result, sizeof(result), NULL, 0) > 0)
320 p = result;
321
322 OPENSSL_cleanse(wresult, sizeof(wresult));
323 }
324 } else
325 # endif
326 if (ReadConsoleA(GetStdHandle(STD_INPUT_HANDLE),
327 result, maxsize, &numread, NULL)) {
328 if (numread >= 2 &&
329 result[numread-2] == '\r' && result[numread-1] == '\n') {
330 result[numread-2] = '\n';
331 numread--;
332 }
333 result[numread] = '\0';
334 p = result;
335 }
336 } else
337 # elif defined(OPENSSL_SYS_MSDOS)
338 if (!echo) {
339 noecho_fgets(result, maxsize, tty_in);
340 p = result; /* FIXME: noecho_fgets doesn't return errors */
341 } else
342 # endif
343 p = fgets(result, maxsize, tty_in);
344 if (p == NULL)
345 goto error;
346 if (feof(tty_in))
347 goto error;
348 if (ferror(tty_in))
349 goto error;
350 if ((p = (char *)strchr(result, '\n')) != NULL) {
351 if (strip_nl)
352 *p = '\0';
353 } else if (!read_till_nl(tty_in))
354 goto error;
355 if (UI_set_result(ui, uis, result) >= 0)
356 ok = 1;
357
358 error:
359 if (intr_signal == SIGINT)
360 ok = -1;
361 if (echo_eol)
362 fprintf(tty_out, "\n");
363 if (ps >= 2 && !echo && !echo_console(ui))
364 ok = 0;
365
366 if (ps >= 1)
367 popsig();
368 # else
369 ok = 1;
370 # endif
371
372 OPENSSL_cleanse(result, BUFSIZ);
373 return ok;
374 }
375
376 /* Internal functions to open, handle and close a channel to the console. */
open_console(UI * ui)377 static int open_console(UI *ui)
378 {
379 CRYPTO_THREAD_write_lock(ui->lock);
380 is_a_tty = 1;
381
382 # if defined(OPENSSL_SYS_VXWORKS)
383 tty_in = stdin;
384 tty_out = stderr;
385 # elif defined(_WIN32) && !defined(_WIN32_WCE)
386 if ((tty_out = fopen("conout$", "w")) == NULL)
387 tty_out = stderr;
388
389 if (GetConsoleMode(GetStdHandle(STD_INPUT_HANDLE), &tty_orig)) {
390 tty_in = stdin;
391 } else {
392 is_a_tty = 0;
393 if ((tty_in = fopen("conin$", "r")) == NULL)
394 tty_in = stdin;
395 }
396 # else
397 # ifdef OPENSSL_SYS_MSDOS
398 # define DEV_TTY "con"
399 # else
400 # define DEV_TTY "/dev/tty"
401 # endif
402 if ((tty_in = fopen(DEV_TTY, "r")) == NULL)
403 tty_in = stdin;
404 if ((tty_out = fopen(DEV_TTY, "w")) == NULL)
405 tty_out = stderr;
406 # endif
407
408 # if defined(TTY_get) && !defined(OPENSSL_SYS_VMS)
409 if (TTY_get(fileno(tty_in), &tty_orig) == -1) {
410 # ifdef ENOTTY
411 if (errno == ENOTTY)
412 is_a_tty = 0;
413 else
414 # endif
415 # ifdef EINVAL
416 /*
417 * Ariel Glenn reports that solaris can return EINVAL instead.
418 * This should be ok
419 */
420 if (errno == EINVAL)
421 is_a_tty = 0;
422 else
423 # endif
424 # ifdef ENXIO
425 /*
426 * Solaris can return ENXIO.
427 * This should be ok
428 */
429 if (errno == ENXIO)
430 is_a_tty = 0;
431 else
432 # endif
433 # ifdef EIO
434 /*
435 * Linux can return EIO.
436 * This should be ok
437 */
438 if (errno == EIO)
439 is_a_tty = 0;
440 else
441 # endif
442 # ifdef EPERM
443 /*
444 * Linux can return EPERM (Operation not permitted),
445 * e.g. if a daemon executes openssl via fork()+execve()
446 * This should be ok
447 */
448 if (errno == EPERM)
449 is_a_tty = 0;
450 else
451 # endif
452 # ifdef ENODEV
453 /*
454 * MacOS X returns ENODEV (Operation not supported by device),
455 * which seems appropriate.
456 */
457 if (errno == ENODEV)
458 is_a_tty = 0;
459 else
460 # endif
461 {
462 char tmp_num[10];
463 BIO_snprintf(tmp_num, sizeof(tmp_num) - 1, "%d", errno);
464 UIerr(UI_F_OPEN_CONSOLE, UI_R_UNKNOWN_TTYGET_ERRNO_VALUE);
465 ERR_add_error_data(2, "errno=", tmp_num);
466
467 return 0;
468 }
469 }
470 # endif
471 # ifdef OPENSSL_SYS_VMS
472 status = sys$assign(&terminal, &channel, 0, 0);
473
474 /* if there isn't a TT device, something is very wrong */
475 if (status != SS$_NORMAL) {
476 char tmp_num[12];
477
478 BIO_snprintf(tmp_num, sizeof(tmp_num) - 1, "%%X%08X", status);
479 UIerr(UI_F_OPEN_CONSOLE, UI_R_SYSASSIGN_ERROR);
480 ERR_add_error_data(2, "status=", tmp_num);
481 return 0;
482 }
483
484 status = sys$qiow(0, channel, IO$_SENSEMODE, &iosb, 0, 0, tty_orig, 12,
485 0, 0, 0, 0);
486
487 /* If IO$_SENSEMODE doesn't work, this is not a terminal device */
488 if ((status != SS$_NORMAL) || (iosb.iosb$w_value != SS$_NORMAL))
489 is_a_tty = 0;
490 # endif
491 return 1;
492 }
493
noecho_console(UI * ui)494 static int noecho_console(UI *ui)
495 {
496 # ifdef TTY_FLAGS
497 memcpy(&(tty_new), &(tty_orig), sizeof(tty_orig));
498 tty_new.TTY_FLAGS &= ~ECHO;
499 # endif
500
501 # if defined(TTY_set) && !defined(OPENSSL_SYS_VMS)
502 if (is_a_tty && (TTY_set(fileno(tty_in), &tty_new) == -1))
503 return 0;
504 # endif
505 # ifdef OPENSSL_SYS_VMS
506 if (is_a_tty) {
507 tty_new[0] = tty_orig[0];
508 tty_new[1] = tty_orig[1] | TT$M_NOECHO;
509 tty_new[2] = tty_orig[2];
510 status = sys$qiow(0, channel, IO$_SETMODE, &iosb, 0, 0, tty_new, 12,
511 0, 0, 0, 0);
512 if ((status != SS$_NORMAL) || (iosb.iosb$w_value != SS$_NORMAL)) {
513 char tmp_num[2][12];
514
515 BIO_snprintf(tmp_num[0], sizeof(tmp_num[0]) - 1, "%%X%08X",
516 status);
517 BIO_snprintf(tmp_num[1], sizeof(tmp_num[1]) - 1, "%%X%08X",
518 iosb.iosb$w_value);
519 UIerr(UI_F_NOECHO_CONSOLE, UI_R_SYSQIOW_ERROR);
520 ERR_add_error_data(5, "status=", tmp_num[0],
521 ",", "iosb.iosb$w_value=", tmp_num[1]);
522 return 0;
523 }
524 }
525 # endif
526 # if defined(_WIN32) && !defined(_WIN32_WCE)
527 if (is_a_tty) {
528 tty_new = tty_orig;
529 tty_new &= ~ENABLE_ECHO_INPUT;
530 SetConsoleMode(GetStdHandle(STD_INPUT_HANDLE), tty_new);
531 }
532 # endif
533 return 1;
534 }
535
echo_console(UI * ui)536 static int echo_console(UI *ui)
537 {
538 # if defined(TTY_set) && !defined(OPENSSL_SYS_VMS)
539 memcpy(&(tty_new), &(tty_orig), sizeof(tty_orig));
540 if (is_a_tty && (TTY_set(fileno(tty_in), &tty_new) == -1))
541 return 0;
542 # endif
543 # ifdef OPENSSL_SYS_VMS
544 if (is_a_tty) {
545 tty_new[0] = tty_orig[0];
546 tty_new[1] = tty_orig[1];
547 tty_new[2] = tty_orig[2];
548 status = sys$qiow(0, channel, IO$_SETMODE, &iosb, 0, 0, tty_new, 12,
549 0, 0, 0, 0);
550 if ((status != SS$_NORMAL) || (iosb.iosb$w_value != SS$_NORMAL)) {
551 char tmp_num[2][12];
552
553 BIO_snprintf(tmp_num[0], sizeof(tmp_num[0]) - 1, "%%X%08X",
554 status);
555 BIO_snprintf(tmp_num[1], sizeof(tmp_num[1]) - 1, "%%X%08X",
556 iosb.iosb$w_value);
557 UIerr(UI_F_ECHO_CONSOLE, UI_R_SYSQIOW_ERROR);
558 ERR_add_error_data(5, "status=", tmp_num[0],
559 ",", "iosb.iosb$w_value=", tmp_num[1]);
560 return 0;
561 }
562 }
563 # endif
564 # if defined(_WIN32) && !defined(_WIN32_WCE)
565 if (is_a_tty) {
566 tty_new = tty_orig;
567 SetConsoleMode(GetStdHandle(STD_INPUT_HANDLE), tty_new);
568 }
569 # endif
570 return 1;
571 }
572
close_console(UI * ui)573 static int close_console(UI *ui)
574 {
575 int ret = 1;
576
577 if (tty_in != stdin)
578 fclose(tty_in);
579 if (tty_out != stderr)
580 fclose(tty_out);
581 # ifdef OPENSSL_SYS_VMS
582 status = sys$dassgn(channel);
583 if (status != SS$_NORMAL) {
584 char tmp_num[12];
585
586 BIO_snprintf(tmp_num, sizeof(tmp_num) - 1, "%%X%08X", status);
587 UIerr(UI_F_CLOSE_CONSOLE, UI_R_SYSDASSGN_ERROR);
588 ERR_add_error_data(2, "status=", tmp_num);
589 ret = 0;
590 }
591 # endif
592 CRYPTO_THREAD_unlock(ui->lock);
593
594 return ret;
595 }
596
597 # if !defined(OPENSSL_SYS_WINCE)
598 /* Internal functions to handle signals and act on them */
pushsig(void)599 static void pushsig(void)
600 {
601 # ifndef OPENSSL_SYS_WIN32
602 int i;
603 # endif
604 # ifdef SIGACTION
605 struct sigaction sa;
606
607 memset(&sa, 0, sizeof(sa));
608 sa.sa_handler = recsig;
609 # endif
610
611 # ifdef OPENSSL_SYS_WIN32
612 savsig[SIGABRT] = signal(SIGABRT, recsig);
613 savsig[SIGFPE] = signal(SIGFPE, recsig);
614 savsig[SIGILL] = signal(SIGILL, recsig);
615 savsig[SIGINT] = signal(SIGINT, recsig);
616 savsig[SIGSEGV] = signal(SIGSEGV, recsig);
617 savsig[SIGTERM] = signal(SIGTERM, recsig);
618 # else
619 for (i = 1; i < NX509_SIG; i++) {
620 # ifdef SIGUSR1
621 if (i == SIGUSR1)
622 continue;
623 # endif
624 # ifdef SIGUSR2
625 if (i == SIGUSR2)
626 continue;
627 # endif
628 # ifdef SIGKILL
629 if (i == SIGKILL) /* We can't make any action on that. */
630 continue;
631 # endif
632 # ifdef SIGACTION
633 sigaction(i, &sa, &savsig[i]);
634 # else
635 savsig[i] = signal(i, recsig);
636 # endif
637 }
638 # endif
639
640 # ifdef SIGWINCH
641 signal(SIGWINCH, SIG_DFL);
642 # endif
643 }
644
popsig(void)645 static void popsig(void)
646 {
647 # ifdef OPENSSL_SYS_WIN32
648 signal(SIGABRT, savsig[SIGABRT]);
649 signal(SIGFPE, savsig[SIGFPE]);
650 signal(SIGILL, savsig[SIGILL]);
651 signal(SIGINT, savsig[SIGINT]);
652 signal(SIGSEGV, savsig[SIGSEGV]);
653 signal(SIGTERM, savsig[SIGTERM]);
654 # else
655 int i;
656 for (i = 1; i < NX509_SIG; i++) {
657 # ifdef SIGUSR1
658 if (i == SIGUSR1)
659 continue;
660 # endif
661 # ifdef SIGUSR2
662 if (i == SIGUSR2)
663 continue;
664 # endif
665 # ifdef SIGACTION
666 sigaction(i, &savsig[i], NULL);
667 # else
668 signal(i, savsig[i]);
669 # endif
670 }
671 # endif
672 }
673
recsig(int i)674 static void recsig(int i)
675 {
676 intr_signal = i;
677 }
678 # endif
679
680 /* Internal functions specific for Windows */
681 # if defined(OPENSSL_SYS_MSDOS) && !defined(_WIN32)
noecho_fgets(char * buf,int size,FILE * tty)682 static int noecho_fgets(char *buf, int size, FILE *tty)
683 {
684 int i;
685 char *p;
686
687 p = buf;
688 for (;;) {
689 if (size == 0) {
690 *p = '\0';
691 break;
692 }
693 size--;
694 # if defined(_WIN32)
695 i = _getch();
696 # else
697 i = getch();
698 # endif
699 if (i == '\r')
700 i = '\n';
701 *(p++) = i;
702 if (i == '\n') {
703 *p = '\0';
704 break;
705 }
706 }
707 # ifdef WIN_CONSOLE_BUG
708 /*
709 * Win95 has several evil console bugs: one of these is that the last
710 * character read using getch() is passed to the next read: this is
711 * usually a CR so this can be trouble. No STDIO fix seems to work but
712 * flushing the console appears to do the trick.
713 */
714 {
715 HANDLE inh;
716 inh = GetStdHandle(STD_INPUT_HANDLE);
717 FlushConsoleInputBuffer(inh);
718 }
719 # endif
720 return strlen(buf);
721 }
722 # endif
723
724 static UI_METHOD ui_openssl = {
725 "OpenSSL default user interface",
726 open_console,
727 write_string,
728 NULL, /* No flusher is needed for command lines */
729 read_string,
730 close_console,
731 NULL
732 };
733
734 /* The method with all the built-in console thingies */
UI_OpenSSL(void)735 UI_METHOD *UI_OpenSSL(void)
736 {
737 return &ui_openssl;
738 }
739
740 static const UI_METHOD *default_UI_meth = &ui_openssl;
741
742 #else
743
744 static const UI_METHOD *default_UI_meth = NULL;
745
746 #endif
747
UI_set_default_method(const UI_METHOD * meth)748 void UI_set_default_method(const UI_METHOD *meth)
749 {
750 default_UI_meth = meth;
751 }
752
UI_get_default_method(void)753 const UI_METHOD *UI_get_default_method(void)
754 {
755 return default_UI_meth;
756 }
757