1 /*
2 * Copyright 2001-2022 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the Apache License 2.0 (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 "internal/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 #include <unistd.h>
38 /*
39 * If unistd.h defines _POSIX_VERSION, we conclude that we are on a POSIX
40 * system and have sigaction and termios.
41 */
42 #if defined(_POSIX_VERSION) && _POSIX_VERSION >= 199309L
43
44 #define SIGACTION
45 #if !defined(TERMIOS) && !defined(TERMIO) && !defined(SGTTY)
46 #define TERMIOS
47 #endif
48
49 #endif
50 #endif
51
52 #include "ui_local.h"
53 #include "internal/cryptlib.h"
54
55 #ifdef OPENSSL_SYS_VMS /* prototypes for sys$whatever */
56 #include <starlet.h>
57 #ifdef __DECC
58 #pragma message disable DOLLARID
59 #endif
60 #endif
61
62 #ifdef WIN_CONSOLE_BUG
63 #include <windows.h>
64 #ifndef OPENSSL_SYS_WINCE
65 #include <wincon.h>
66 #endif
67 #endif
68
69 /*
70 * There are 6 types of terminal interface supported, TERMIO, TERMIOS, VMS,
71 * MSDOS, WIN32 Console and SGTTY.
72 *
73 * If someone defines one of the macros TERMIO, TERMIOS or SGTTY, it will
74 * remain respected. Otherwise, we default to TERMIOS except for a few
75 * systems that require something different.
76 *
77 * Note: we do not use SGTTY unless it's defined by the configuration. We
78 * may eventually opt to remove its use entirely.
79 */
80
81 #if !defined(TERMIOS) && !defined(TERMIO) && !defined(SGTTY)
82
83 #if defined(_LIBC)
84 #undef TERMIOS
85 #define TERMIO
86 #undef SGTTY
87 /*
88 * We know that VMS, MSDOS, VXWORKS, use entirely other mechanisms.
89 */
90 #elif !defined(OPENSSL_SYS_VMS) \
91 && !defined(OPENSSL_SYS_MSDOS) \
92 && !defined(OPENSSL_SYS_VXWORKS)
93 #define TERMIOS
94 #undef TERMIO
95 #undef SGTTY
96 #endif
97
98 #endif
99
100 #if defined(OPENSSL_SYS_VXWORKS)
101 #undef TERMIOS
102 #undef TERMIO
103 #undef SGTTY
104 #endif
105
106 #ifdef TERMIOS
107 #include <termios.h>
108 #define TTY_STRUCT struct termios
109 #define TTY_FLAGS c_lflag
110 #define TTY_get(tty, data) tcgetattr(tty, data)
111 #define TTY_set(tty, data) tcsetattr(tty, TCSANOW, data)
112 #endif
113
114 #ifdef TERMIO
115 #include <termio.h>
116 #define TTY_STRUCT struct termio
117 #define TTY_FLAGS c_lflag
118 #define TTY_get(tty, data) ioctl(tty, TCGETA, data)
119 #define TTY_set(tty, data) ioctl(tty, TCSETA, data)
120 #endif
121
122 #ifdef SGTTY
123 #include <sgtty.h>
124 #define TTY_STRUCT struct sgttyb
125 #define TTY_FLAGS sg_flags
126 #define TTY_get(tty, data) ioctl(tty, TIOCGETP, data)
127 #define TTY_set(tty, data) ioctl(tty, TIOCSETP, data)
128 #endif
129
130 #if !defined(_LIBC) && !defined(OPENSSL_SYS_MSDOS) && !defined(OPENSSL_SYS_VMS) && !(defined(OPENSSL_SYS_TANDEM) && defined(_SPT_MODEL_))
131 #include <sys/ioctl.h>
132 #endif
133
134 #ifdef OPENSSL_SYS_MSDOS
135 #include <conio.h>
136 #endif
137
138 #ifdef OPENSSL_SYS_VMS
139 #include <ssdef.h>
140 #include <iodef.h>
141 #include <ttdef.h>
142 #include <descrip.h>
143 struct IOSB {
144 short iosb$w_value;
145 short iosb$w_count;
146 long iosb$l_info;
147 };
148 #endif
149
150 #ifndef NX509_SIG
151 #define NX509_SIG 32
152 #endif
153
154 /* Define globals. They are protected by a lock */
155 #ifdef SIGACTION
156 static struct sigaction savsig[NX509_SIG];
157 #else
158 static void (*savsig[NX509_SIG])(int);
159 #endif
160
161 #ifdef OPENSSL_SYS_VMS
162 static struct IOSB iosb;
163 static $DESCRIPTOR(terminal, "TT");
164 static long tty_orig[3], tty_new[3]; /* XXX Is there any guarantee that this
165 * will always suffice for the actual
166 * structures? */
167 static long status;
168 static unsigned short channel = 0;
169 #elif defined(_WIN32) && !defined(_WIN32_WCE)
170 static DWORD tty_orig, tty_new;
171 #else
172 #if !defined(OPENSSL_SYS_MSDOS) || defined(__DJGPP__)
173 static TTY_STRUCT tty_orig, tty_new;
174 #endif
175 #endif
176 static FILE *tty_in, *tty_out;
177 static int is_a_tty;
178
179 /* Declare static functions */
180 #if !defined(OPENSSL_SYS_WINCE)
181 static int read_till_nl(FILE *);
182 static void recsig(int);
183 static void pushsig(void);
184 static void popsig(void);
185 #endif
186 #if defined(OPENSSL_SYS_MSDOS) && !defined(_WIN32)
187 static int noecho_fgets(char *buf, int size, FILE *tty);
188 #endif
189 static int read_string_inner(UI *ui, UI_STRING *uis, int echo, int strip_nl);
190
191 static int read_string(UI *ui, UI_STRING *uis);
192 static int write_string(UI *ui, UI_STRING *uis);
193
194 static int open_console(UI *ui);
195 static int echo_console(UI *ui);
196 static int noecho_console(UI *ui);
197 static int close_console(UI *ui);
198
199 /*
200 * The following function makes sure that info and error strings are printed
201 * before any prompt.
202 */
write_string(UI * ui,UI_STRING * uis)203 static int write_string(UI *ui, UI_STRING *uis)
204 {
205 switch (UI_get_string_type(uis)) {
206 case UIT_ERROR:
207 case UIT_INFO:
208 fputs(UI_get0_output_string(uis), tty_out);
209 fflush(tty_out);
210 break;
211 case UIT_NONE:
212 case UIT_PROMPT:
213 case UIT_VERIFY:
214 case UIT_BOOLEAN:
215 break;
216 }
217 return 1;
218 }
219
read_string(UI * ui,UI_STRING * uis)220 static int read_string(UI *ui, UI_STRING *uis)
221 {
222 int ok = 0;
223
224 switch (UI_get_string_type(uis)) {
225 case UIT_BOOLEAN:
226 fputs(UI_get0_output_string(uis), tty_out);
227 fputs(UI_get0_action_string(uis), tty_out);
228 fflush(tty_out);
229 return read_string_inner(ui, uis,
230 UI_get_input_flags(uis) & UI_INPUT_FLAG_ECHO,
231 0);
232 case UIT_PROMPT:
233 fputs(UI_get0_output_string(uis), tty_out);
234 fflush(tty_out);
235 return read_string_inner(ui, uis,
236 UI_get_input_flags(uis) & UI_INPUT_FLAG_ECHO,
237 1);
238 case UIT_VERIFY:
239 fprintf(tty_out, "Verifying - %s", UI_get0_output_string(uis));
240 fflush(tty_out);
241 if ((ok = read_string_inner(ui, uis,
242 UI_get_input_flags(uis) & UI_INPUT_FLAG_ECHO, 1))
243 <= 0)
244 return ok;
245 if (strcmp(UI_get0_result_string(uis), UI_get0_test_string(uis)) != 0) {
246 fprintf(tty_out, "Verify failure\n");
247 fflush(tty_out);
248 return 0;
249 }
250 break;
251 case UIT_NONE:
252 case UIT_INFO:
253 case UIT_ERROR:
254 break;
255 }
256 return 1;
257 }
258
259 #if !defined(OPENSSL_SYS_WINCE)
260 /* Internal functions to read a string without echoing */
read_till_nl(FILE * in)261 static int read_till_nl(FILE *in)
262 {
263 #define SIZE 4
264 char buf[SIZE + 1];
265
266 do {
267 if (!fgets(buf, SIZE, in))
268 return 0;
269 } while (strchr(buf, '\n') == NULL);
270 return 1;
271 }
272
273 static volatile sig_atomic_t intr_signal;
274 #endif
275
read_string_inner(UI * ui,UI_STRING * uis,int echo,int strip_nl)276 static int read_string_inner(UI *ui, UI_STRING *uis, int echo, int strip_nl)
277 {
278 static int ps;
279 int ok;
280 char result[BUFSIZ];
281 int maxsize = BUFSIZ - 1;
282 #if !defined(OPENSSL_SYS_WINCE)
283 char *p = NULL;
284 int echo_eol = !echo;
285
286 intr_signal = 0;
287 ok = 0;
288 ps = 0;
289
290 pushsig();
291 ps = 1;
292
293 if (!echo && !noecho_console(ui))
294 goto error;
295 ps = 2;
296
297 result[0] = '\0';
298 #if defined(_WIN32)
299 if (is_a_tty) {
300 DWORD numread;
301 #if defined(CP_UTF8)
302 if (GetEnvironmentVariableW(L"OPENSSL_WIN32_UTF8", NULL, 0) != 0) {
303 WCHAR wresult[BUFSIZ];
304
305 if (ReadConsoleW(GetStdHandle(STD_INPUT_HANDLE),
306 wresult, maxsize, &numread, NULL)) {
307 if (numread >= 2 && wresult[numread - 2] == L'\r' && wresult[numread - 1] == L'\n') {
308 wresult[numread - 2] = L'\n';
309 numread--;
310 }
311 wresult[numread] = '\0';
312 if (WideCharToMultiByte(CP_UTF8, 0, wresult, -1,
313 result, sizeof(result), NULL, 0)
314 > 0)
315 p = result;
316
317 OPENSSL_cleanse(wresult, sizeof(wresult));
318 }
319 } else
320 #endif
321 if (ReadConsoleA(GetStdHandle(STD_INPUT_HANDLE),
322 result, maxsize, &numread, NULL)) {
323 if (numread >= 2 && result[numread - 2] == '\r' && result[numread - 1] == '\n') {
324 result[numread - 2] = '\n';
325 numread--;
326 }
327 result[numread] = '\0';
328 p = result;
329 }
330 } else
331 #elif defined(OPENSSL_SYS_MSDOS)
332 if (!echo) {
333 noecho_fgets(result, maxsize, tty_in);
334 p = result; /* FIXME: noecho_fgets doesn't return errors */
335 } else
336 #endif
337 p = fgets(result, maxsize, tty_in);
338 if (p == NULL)
339 goto error;
340 if (feof(tty_in))
341 goto error;
342 if (ferror(tty_in))
343 goto error;
344 if ((p = (char *)strchr(result, '\n')) != NULL) {
345 if (strip_nl)
346 *p = '\0';
347 } else if (!read_till_nl(tty_in))
348 goto error;
349 if (UI_set_result(ui, uis, result) >= 0)
350 ok = 1;
351
352 error:
353 if (intr_signal == SIGINT)
354 ok = -1;
355 if (echo_eol)
356 fprintf(tty_out, "\n");
357 if (ps >= 2 && !echo && !echo_console(ui))
358 ok = 0;
359
360 if (ps >= 1)
361 popsig();
362 #else
363 ok = 1;
364 #endif
365
366 OPENSSL_cleanse(result, BUFSIZ);
367 return ok;
368 }
369
370 /* Internal functions to open, handle and close a channel to the console. */
open_console(UI * ui)371 static int open_console(UI *ui)
372 {
373 if (!CRYPTO_THREAD_write_lock(ui->lock))
374 return 0;
375 is_a_tty = 1;
376
377 #if defined(OPENSSL_SYS_VXWORKS)
378 tty_in = stdin;
379 tty_out = stderr;
380 #elif defined(_WIN32) && !defined(_WIN32_WCE)
381 if ((tty_out = fopen("conout$", "w")) == NULL)
382 tty_out = stderr;
383
384 if (GetConsoleMode(GetStdHandle(STD_INPUT_HANDLE), &tty_orig)) {
385 tty_in = stdin;
386 } else {
387 is_a_tty = 0;
388 if ((tty_in = fopen("conin$", "r")) == NULL)
389 tty_in = stdin;
390 }
391 #else
392 #ifdef OPENSSL_SYS_MSDOS
393 #define DEV_TTY "con"
394 #else
395 #define DEV_TTY "/dev/tty"
396 #endif
397 if ((tty_in = fopen(DEV_TTY, "r")) == NULL)
398 tty_in = stdin;
399 if ((tty_out = fopen(DEV_TTY, "w")) == NULL)
400 tty_out = stderr;
401 #endif
402
403 #if defined(TTY_get) && !defined(OPENSSL_SYS_VMS)
404 if (TTY_get(fileno(tty_in), &tty_orig) == -1) {
405 #ifdef ENOTTY
406 if (errno == ENOTTY)
407 is_a_tty = 0;
408 else
409 #endif
410 #ifdef EINVAL
411 /*
412 * Ariel Glenn reports that solaris can return EINVAL instead.
413 * This should be ok
414 */
415 if (errno == EINVAL)
416 is_a_tty = 0;
417 else
418 #endif
419 #ifdef ENXIO
420 /*
421 * Solaris can return ENXIO.
422 * This should be ok
423 */
424 if (errno == ENXIO)
425 is_a_tty = 0;
426 else
427 #endif
428 #ifdef EIO
429 /*
430 * Linux can return EIO.
431 * This should be ok
432 */
433 if (errno == EIO)
434 is_a_tty = 0;
435 else
436 #endif
437 #ifdef EPERM
438 /*
439 * Linux can return EPERM (Operation not permitted),
440 * e.g. if a daemon executes openssl via fork()+execve()
441 * This should be ok
442 */
443 if (errno == EPERM)
444 is_a_tty = 0;
445 else
446 #endif
447 #ifdef ENODEV
448 /*
449 * MacOS X returns ENODEV (Operation not supported by device),
450 * which seems appropriate.
451 */
452 if (errno == ENODEV)
453 is_a_tty = 0;
454 else
455 #endif
456 {
457 ERR_raise_data(ERR_LIB_UI, UI_R_UNKNOWN_TTYGET_ERRNO_VALUE,
458 "errno=%d", errno);
459 return 0;
460 }
461 }
462 #endif
463 #ifdef OPENSSL_SYS_VMS
464 status = sys$assign(&terminal, &channel, 0, 0);
465
466 /* if there isn't a TT device, something is very wrong */
467 if (status != SS$_NORMAL) {
468 ERR_raise_data(ERR_LIB_UI, UI_R_SYSASSIGN_ERROR,
469 "status=%%X%08X", status);
470 return 0;
471 }
472
473 status = sys$qiow(0, channel, IO$_SENSEMODE, &iosb, 0, 0, tty_orig, 12,
474 0, 0, 0, 0);
475
476 /* If IO$_SENSEMODE doesn't work, this is not a terminal device */
477 if ((status != SS$_NORMAL) || (iosb.iosb$w_value != SS$_NORMAL))
478 is_a_tty = 0;
479 #endif
480 return 1;
481 }
482
noecho_console(UI * ui)483 static int noecho_console(UI *ui)
484 {
485 #ifdef TTY_FLAGS
486 memcpy(&(tty_new), &(tty_orig), sizeof(tty_orig));
487 tty_new.TTY_FLAGS &= ~ECHO;
488 #endif
489
490 #if defined(TTY_set) && !defined(OPENSSL_SYS_VMS)
491 if (is_a_tty && (TTY_set(fileno(tty_in), &tty_new) == -1))
492 return 0;
493 #endif
494 #ifdef OPENSSL_SYS_VMS
495 if (is_a_tty) {
496 tty_new[0] = tty_orig[0];
497 tty_new[1] = tty_orig[1] | TT$M_NOECHO;
498 tty_new[2] = tty_orig[2];
499 status = sys$qiow(0, channel, IO$_SETMODE, &iosb, 0, 0, tty_new, 12,
500 0, 0, 0, 0);
501 if ((status != SS$_NORMAL) || (iosb.iosb$w_value != SS$_NORMAL)) {
502 ERR_raise_data(ERR_LIB_UI, UI_R_SYSQIOW_ERROR,
503 "status=%%X%08X, iosb.iosb$w_value=%%X%08X",
504 status, iosb.iosb$w_value);
505 return 0;
506 }
507 }
508 #endif
509 #if defined(_WIN32) && !defined(_WIN32_WCE)
510 if (is_a_tty) {
511 tty_new = tty_orig;
512 tty_new &= ~ENABLE_ECHO_INPUT;
513 SetConsoleMode(GetStdHandle(STD_INPUT_HANDLE), tty_new);
514 }
515 #endif
516 return 1;
517 }
518
echo_console(UI * ui)519 static int echo_console(UI *ui)
520 {
521 #if defined(TTY_set) && !defined(OPENSSL_SYS_VMS)
522 memcpy(&(tty_new), &(tty_orig), sizeof(tty_orig));
523 if (is_a_tty && (TTY_set(fileno(tty_in), &tty_new) == -1))
524 return 0;
525 #endif
526 #ifdef OPENSSL_SYS_VMS
527 if (is_a_tty) {
528 tty_new[0] = tty_orig[0];
529 tty_new[1] = tty_orig[1];
530 tty_new[2] = tty_orig[2];
531 status = sys$qiow(0, channel, IO$_SETMODE, &iosb, 0, 0, tty_new, 12,
532 0, 0, 0, 0);
533 if ((status != SS$_NORMAL) || (iosb.iosb$w_value != SS$_NORMAL)) {
534 ERR_raise_data(ERR_LIB_UI, UI_R_SYSQIOW_ERROR,
535 "status=%%X%08X, iosb.iosb$w_value=%%X%08X",
536 status, iosb.iosb$w_value);
537 return 0;
538 }
539 }
540 #endif
541 #if defined(_WIN32) && !defined(_WIN32_WCE)
542 if (is_a_tty) {
543 tty_new = tty_orig;
544 SetConsoleMode(GetStdHandle(STD_INPUT_HANDLE), tty_new);
545 }
546 #endif
547 return 1;
548 }
549
close_console(UI * ui)550 static int close_console(UI *ui)
551 {
552 int ret = 1;
553
554 if (tty_in != stdin)
555 fclose(tty_in);
556 if (tty_out != stderr)
557 fclose(tty_out);
558 #ifdef OPENSSL_SYS_VMS
559 status = sys$dassgn(channel);
560 if (status != SS$_NORMAL) {
561 ERR_raise_data(ERR_LIB_UI, UI_R_SYSDASSGN_ERROR,
562 "status=%%X%08X", status);
563 ret = 0;
564 }
565 #endif
566 CRYPTO_THREAD_unlock(ui->lock);
567
568 return ret;
569 }
570
571 #if !defined(OPENSSL_SYS_WINCE)
572 /* Internal functions to handle signals and act on them */
pushsig(void)573 static void pushsig(void)
574 {
575 #ifndef OPENSSL_SYS_WIN32
576 int i;
577 #endif
578 #ifdef SIGACTION
579 struct sigaction sa;
580
581 memset(&sa, 0, sizeof(sa));
582 sa.sa_handler = recsig;
583 #endif
584
585 #ifdef OPENSSL_SYS_WIN32
586 savsig[SIGABRT] = signal(SIGABRT, recsig);
587 savsig[SIGFPE] = signal(SIGFPE, recsig);
588 savsig[SIGILL] = signal(SIGILL, recsig);
589 savsig[SIGINT] = signal(SIGINT, recsig);
590 savsig[SIGSEGV] = signal(SIGSEGV, recsig);
591 savsig[SIGTERM] = signal(SIGTERM, recsig);
592 #else
593 for (i = 1; i < NX509_SIG; i++) {
594 #ifdef SIGUSR1
595 if (i == SIGUSR1)
596 continue;
597 #endif
598 #ifdef SIGUSR2
599 if (i == SIGUSR2)
600 continue;
601 #endif
602 #ifdef SIGKILL
603 if (i == SIGKILL) /* We can't make any action on that. */
604 continue;
605 #endif
606 #ifdef SIGACTION
607 sigaction(i, &sa, &savsig[i]);
608 #else
609 savsig[i] = signal(i, recsig);
610 #endif
611 }
612 #endif
613
614 #ifdef SIGWINCH
615 signal(SIGWINCH, SIG_DFL);
616 #endif
617 }
618
popsig(void)619 static void popsig(void)
620 {
621 #ifdef OPENSSL_SYS_WIN32
622 signal(SIGABRT, savsig[SIGABRT]);
623 signal(SIGFPE, savsig[SIGFPE]);
624 signal(SIGILL, savsig[SIGILL]);
625 signal(SIGINT, savsig[SIGINT]);
626 signal(SIGSEGV, savsig[SIGSEGV]);
627 signal(SIGTERM, savsig[SIGTERM]);
628 #else
629 int i;
630 for (i = 1; i < NX509_SIG; i++) {
631 #ifdef SIGUSR1
632 if (i == SIGUSR1)
633 continue;
634 #endif
635 #ifdef SIGUSR2
636 if (i == SIGUSR2)
637 continue;
638 #endif
639 #ifdef SIGACTION
640 sigaction(i, &savsig[i], NULL);
641 #else
642 signal(i, savsig[i]);
643 #endif
644 }
645 #endif
646 }
647
recsig(int i)648 static void recsig(int i)
649 {
650 intr_signal = i;
651 }
652 #endif
653
654 /* Internal functions specific for Windows */
655 #if defined(OPENSSL_SYS_MSDOS) && !defined(_WIN32)
noecho_fgets(char * buf,int size,FILE * tty)656 static int noecho_fgets(char *buf, int size, FILE *tty)
657 {
658 int i;
659 char *p;
660
661 p = buf;
662 for (;;) {
663 if (size == 0) {
664 *p = '\0';
665 break;
666 }
667 size--;
668 #if defined(_WIN32)
669 i = _getch();
670 #else
671 i = getch();
672 #endif
673 if (i == '\r')
674 i = '\n';
675 *(p++) = i;
676 if (i == '\n') {
677 *p = '\0';
678 break;
679 }
680 }
681 #ifdef WIN_CONSOLE_BUG
682 /*
683 * Win95 has several evil console bugs: one of these is that the last
684 * character read using getch() is passed to the next read: this is
685 * usually a CR so this can be trouble. No STDIO fix seems to work but
686 * flushing the console appears to do the trick.
687 */
688 {
689 HANDLE inh;
690 inh = GetStdHandle(STD_INPUT_HANDLE);
691 FlushConsoleInputBuffer(inh);
692 }
693 #endif
694 return strlen(buf);
695 }
696 #endif
697
698 static UI_METHOD ui_openssl = {
699 "OpenSSL default user interface",
700 open_console,
701 write_string,
702 NULL, /* No flusher is needed for command lines */
703 read_string,
704 close_console,
705 NULL
706 };
707
708 /* The method with all the built-in console thingies */
UI_OpenSSL(void)709 UI_METHOD *UI_OpenSSL(void)
710 {
711 return &ui_openssl;
712 }
713
714 static const UI_METHOD *default_UI_meth = &ui_openssl;
715
716 #else
717
718 static const UI_METHOD *default_UI_meth = NULL;
719
720 #endif
721
UI_set_default_method(const UI_METHOD * meth)722 void UI_set_default_method(const UI_METHOD *meth)
723 {
724 default_UI_meth = meth;
725 }
726
UI_get_default_method(void)727 const UI_METHOD *UI_get_default_method(void)
728 {
729 return default_UI_meth;
730 }
731