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1/*
2 * Copyright 2001-2020 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 "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)
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>
143struct 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
156static struct sigaction savsig[NX509_SIG];
157# else
158static void (*savsig[NX509_SIG]) (int);
159# endif
160
161# ifdef OPENSSL_SYS_VMS
162static struct IOSB iosb;
163static $DESCRIPTOR(terminal, "TT");
164static long tty_orig[3], tty_new[3]; /* XXX Is there any guarantee that this
165 * will always suffice for the actual
166 * structures? */
167static long status;
168static unsigned short channel = 0;
169# elif defined(_WIN32) && !defined(_WIN32_WCE)
170static DWORD tty_orig, tty_new;
171# else
172# if !defined(OPENSSL_SYS_MSDOS) || defined(__DJGPP__)
173static TTY_STRUCT tty_orig, tty_new;
174# endif
175# endif
176static FILE *tty_in, *tty_out;
177static int is_a_tty;
178
179/* Declare static functions */
180# if !defined(OPENSSL_SYS_WINCE)
181static int read_till_nl(FILE *);
182static void recsig(int);
183static void pushsig(void);
184static void popsig(void);
185# endif
186# if defined(OPENSSL_SYS_MSDOS) && !defined(_WIN32)
187static int noecho_fgets(char *buf, int size, FILE *tty);
188# endif
189static int read_string_inner(UI *ui, UI_STRING *uis, int echo, int strip_nl);
190
191static int read_string(UI *ui, UI_STRING *uis);
192static int write_string(UI *ui, UI_STRING *uis);
193
194static int open_console(UI *ui);
195static int echo_console(UI *ui);
196static int noecho_console(UI *ui);
197static 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 */
203static 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
220static 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) &
243 UI_INPUT_FLAG_ECHO, 1)) <= 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 */
261static 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
273static volatile sig_atomic_t intr_signal;
274# endif
275
276static 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 &&
308 wresult[numread-2] == L'\r' &&
309 wresult[numread-1] == L'\n') {
310 wresult[numread-2] = L'\n';
311 numread--;
312 }
313 wresult[numread] = '\0';
314 if (WideCharToMultiByte(CP_UTF8, 0, wresult, -1,
315 result, sizeof(result), NULL, 0) > 0)
316 p = result;
317
318 OPENSSL_cleanse(wresult, sizeof(wresult));
319 }
320 } else
321# endif
322 if (ReadConsoleA(GetStdHandle(STD_INPUT_HANDLE),
323 result, maxsize, &numread, NULL)) {
324 if (numread >= 2 &&
325 result[numread-2] == '\r' && result[numread-1] == '\n') {
326 result[numread-2] = '\n';
327 numread--;
328 }
329 result[numread] = '\0';
330 p = result;
331 }
332 } else
333# elif defined(OPENSSL_SYS_MSDOS)
334 if (!echo) {
335 noecho_fgets(result, maxsize, tty_in);
336 p = result; /* FIXME: noecho_fgets doesn't return errors */
337 } else
338# endif
339 p = fgets(result, maxsize, tty_in);
340 if (p == NULL)
341 goto error;
342 if (feof(tty_in))
343 goto error;
344 if (ferror(tty_in))
345 goto error;
346 if ((p = (char *)strchr(result, '\n')) != NULL) {
347 if (strip_nl)
348 *p = '\0';
349 } else if (!read_till_nl(tty_in))
350 goto error;
351 if (UI_set_result(ui, uis, result) >= 0)
352 ok = 1;
353
354 error:
355 if (intr_signal == SIGINT)
356 ok = -1;
357 if (echo_eol)
358 fprintf(tty_out, "\n");
359 if (ps >= 2 && !echo && !echo_console(ui))
360 ok = 0;
361
362 if (ps >= 1)
363 popsig();
364# else
365 ok = 1;
366# endif
367
368 OPENSSL_cleanse(result, BUFSIZ);
369 return ok;
370}
371
372/* Internal functions to open, handle and close a channel to the console. */
373static int open_console(UI *ui)
374{
375 CRYPTO_THREAD_write_lock(ui->lock);
376 is_a_tty = 1;
377
378# if defined(OPENSSL_SYS_VXWORKS)
379 tty_in = stdin;
380 tty_out = stderr;
381# elif defined(_WIN32) && !defined(_WIN32_WCE)
382 if ((tty_out = fopen("conout$", "w")) == NULL)
383 tty_out = stderr;
384
385 if (GetConsoleMode(GetStdHandle(STD_INPUT_HANDLE), &tty_orig)) {
386 tty_in = stdin;
387 } else {
388 is_a_tty = 0;
389 if ((tty_in = fopen("conin$", "r")) == NULL)
390 tty_in = stdin;
391 }
392# else
393# ifdef OPENSSL_SYS_MSDOS
394# define DEV_TTY "con"
395# else
396# define DEV_TTY "/dev/tty"
397# endif
398 if ((tty_in = fopen(DEV_TTY, "r")) == NULL)
399 tty_in = stdin;
400 if ((tty_out = fopen(DEV_TTY, "w")) == NULL)
401 tty_out = stderr;
402# endif
403
404# if defined(TTY_get) && !defined(OPENSSL_SYS_VMS)
405 if (TTY_get(fileno(tty_in), &tty_orig) == -1) {
406# ifdef ENOTTY
407 if (errno == ENOTTY)
408 is_a_tty = 0;
409 else
410# endif
411# ifdef EINVAL
412 /*
413 * Ariel Glenn reports that solaris can return EINVAL instead.
414 * This should be ok
415 */
416 if (errno == EINVAL)
417 is_a_tty = 0;
418 else
419# endif
420# ifdef ENXIO
421 /*
422 * Solaris can return ENXIO.
423 * This should be ok
424 */
425 if (errno == ENXIO)
426 is_a_tty = 0;
427 else
428# endif
429# ifdef EIO
430 /*
431 * Linux can return EIO.
432 * This should be ok
433 */
434 if (errno == EIO)
435 is_a_tty = 0;
436 else
437# endif
438# ifdef EPERM
439 /*
440 * Linux can return EPERM (Operation not permitted),
441 * e.g. if a daemon executes openssl via fork()+execve()
442 * This should be ok
443 */
444 if (errno == EPERM)
445 is_a_tty = 0;
446 else
447# endif
448# ifdef ENODEV
449 /*
450 * MacOS X returns ENODEV (Operation not supported by device),
451 * which seems appropriate.
452 */
453 if (errno == ENODEV)
454 is_a_tty = 0;
455 else
456# endif
457 {
458 char tmp_num[10];
459 BIO_snprintf(tmp_num, sizeof(tmp_num) - 1, "%d", errno);
460 UIerr(UI_F_OPEN_CONSOLE, UI_R_UNKNOWN_TTYGET_ERRNO_VALUE);
461 ERR_add_error_data(2, "errno=", tmp_num);
462
463 return 0;
464 }
465 }
466# endif
467# ifdef OPENSSL_SYS_VMS
468 status = sys$assign(&terminal, &channel, 0, 0);
469
470 /* if there isn't a TT device, something is very wrong */
471 if (status != SS$_NORMAL) {
472 char tmp_num[12];
473
474 BIO_snprintf(tmp_num, sizeof(tmp_num) - 1, "%%X%08X", status);
475 UIerr(UI_F_OPEN_CONSOLE, UI_R_SYSASSIGN_ERROR);
476 ERR_add_error_data(2, "status=", tmp_num);
477 return 0;
478 }
479
480 status = sys$qiow(0, channel, IO$_SENSEMODE, &iosb, 0, 0, tty_orig, 12,
481 0, 0, 0, 0);
482
483 /* If IO$_SENSEMODE doesn't work, this is not a terminal device */
484 if ((status != SS$_NORMAL) || (iosb.iosb$w_value != SS$_NORMAL))
485 is_a_tty = 0;
486# endif
487 return 1;
488}
489
490static int noecho_console(UI *ui)
491{
492# ifdef TTY_FLAGS
493 memcpy(&(tty_new), &(tty_orig), sizeof(tty_orig));
494 tty_new.TTY_FLAGS &= ~ECHO;
495# endif
496
497# if defined(TTY_set) && !defined(OPENSSL_SYS_VMS)
498 if (is_a_tty && (TTY_set(fileno(tty_in), &tty_new) == -1))
499 return 0;
500# endif
501# ifdef OPENSSL_SYS_VMS
502 if (is_a_tty) {
503 tty_new[0] = tty_orig[0];
504 tty_new[1] = tty_orig[1] | TT$M_NOECHO;
505 tty_new[2] = tty_orig[2];
506 status = sys$qiow(0, channel, IO$_SETMODE, &iosb, 0, 0, tty_new, 12,
507 0, 0, 0, 0);
508 if ((status != SS$_NORMAL) || (iosb.iosb$w_value != SS$_NORMAL)) {
509 char tmp_num[2][12];
510
511 BIO_snprintf(tmp_num[0], sizeof(tmp_num[0]) - 1, "%%X%08X",
512 status);
513 BIO_snprintf(tmp_num[1], sizeof(tmp_num[1]) - 1, "%%X%08X",
514 iosb.iosb$w_value);
515 UIerr(UI_F_NOECHO_CONSOLE, UI_R_SYSQIOW_ERROR);
516 ERR_add_error_data(5, "status=", tmp_num[0],
517 ",", "iosb.iosb$w_value=", tmp_num[1]);
518 return 0;
519 }
520 }
521# endif
522# if defined(_WIN32) && !defined(_WIN32_WCE)
523 if (is_a_tty) {
524 tty_new = tty_orig;
525 tty_new &= ~ENABLE_ECHO_INPUT;
526 SetConsoleMode(GetStdHandle(STD_INPUT_HANDLE), tty_new);
527 }
528# endif
529 return 1;
530}
531
532static int echo_console(UI *ui)
533{
534# if defined(TTY_set) && !defined(OPENSSL_SYS_VMS)
535 memcpy(&(tty_new), &(tty_orig), sizeof(tty_orig));
536 if (is_a_tty && (TTY_set(fileno(tty_in), &tty_new) == -1))
537 return 0;
538# endif
539# ifdef OPENSSL_SYS_VMS
540 if (is_a_tty) {
541 tty_new[0] = tty_orig[0];
542 tty_new[1] = tty_orig[1];
543 tty_new[2] = tty_orig[2];
544 status = sys$qiow(0, channel, IO$_SETMODE, &iosb, 0, 0, tty_new, 12,
545 0, 0, 0, 0);
546 if ((status != SS$_NORMAL) || (iosb.iosb$w_value != SS$_NORMAL)) {
547 char tmp_num[2][12];
548
549 BIO_snprintf(tmp_num[0], sizeof(tmp_num[0]) - 1, "%%X%08X",
550 status);
551 BIO_snprintf(tmp_num[1], sizeof(tmp_num[1]) - 1, "%%X%08X",
552 iosb.iosb$w_value);
553 UIerr(UI_F_ECHO_CONSOLE, UI_R_SYSQIOW_ERROR);
554 ERR_add_error_data(5, "status=", tmp_num[0],
555 ",", "iosb.iosb$w_value=", tmp_num[1]);
556 return 0;
557 }
558 }
559# endif
560# if defined(_WIN32) && !defined(_WIN32_WCE)
561 if (is_a_tty) {
562 tty_new = tty_orig;
563 SetConsoleMode(GetStdHandle(STD_INPUT_HANDLE), tty_new);
564 }
565# endif
566 return 1;
567}
568
569static int close_console(UI *ui)
570{
571 if (tty_in != stdin)
572 fclose(tty_in);
573 if (tty_out != stderr)
574 fclose(tty_out);
575# ifdef OPENSSL_SYS_VMS
576 status = sys$dassgn(channel);
577 if (status != SS$_NORMAL) {
578 char tmp_num[12];
579
580 BIO_snprintf(tmp_num, sizeof(tmp_num) - 1, "%%X%08X", status);
581 UIerr(UI_F_CLOSE_CONSOLE, UI_R_SYSDASSGN_ERROR);
582 ERR_add_error_data(2, "status=", tmp_num);
583 return 0;
584 }
585# endif
586 CRYPTO_THREAD_unlock(ui->lock);
587
588 return 1;
589}
590
591# if !defined(OPENSSL_SYS_WINCE)
592/* Internal functions to handle signals and act on them */
593static void pushsig(void)
594{
595# ifndef OPENSSL_SYS_WIN32
596 int i;
597# endif
598# ifdef SIGACTION
599 struct sigaction sa;
600
601 memset(&sa, 0, sizeof(sa));
602 sa.sa_handler = recsig;
603# endif
604
605# ifdef OPENSSL_SYS_WIN32
606 savsig[SIGABRT] = signal(SIGABRT, recsig);
607 savsig[SIGFPE] = signal(SIGFPE, recsig);
608 savsig[SIGILL] = signal(SIGILL, recsig);
609 savsig[SIGINT] = signal(SIGINT, recsig);
610 savsig[SIGSEGV] = signal(SIGSEGV, recsig);
611 savsig[SIGTERM] = signal(SIGTERM, recsig);
612# else
613 for (i = 1; i < NX509_SIG; i++) {
614# ifdef SIGUSR1
615 if (i == SIGUSR1)
616 continue;
617# endif
618# ifdef SIGUSR2
619 if (i == SIGUSR2)
620 continue;
621# endif
622# ifdef SIGKILL
623 if (i == SIGKILL) /* We can't make any action on that. */
624 continue;
625# endif
626# ifdef SIGACTION
627 sigaction(i, &sa, &savsig[i]);
628# else
629 savsig[i] = signal(i, recsig);
630# endif
631 }
632# endif
633
634# ifdef SIGWINCH
635 signal(SIGWINCH, SIG_DFL);
636# endif
637}
638
639static void popsig(void)
640{
641# ifdef OPENSSL_SYS_WIN32
642 signal(SIGABRT, savsig[SIGABRT]);
643 signal(SIGFPE, savsig[SIGFPE]);
644 signal(SIGILL, savsig[SIGILL]);
645 signal(SIGINT, savsig[SIGINT]);
646 signal(SIGSEGV, savsig[SIGSEGV]);
647 signal(SIGTERM, savsig[SIGTERM]);
648# else
649 int i;
650 for (i = 1; i < NX509_SIG; i++) {
651# ifdef SIGUSR1
652 if (i == SIGUSR1)
653 continue;
654# endif
655# ifdef SIGUSR2
656 if (i == SIGUSR2)
657 continue;
658# endif
659# ifdef SIGACTION
660 sigaction(i, &savsig[i], NULL);
661# else
662 signal(i, savsig[i]);
663# endif
664 }
665# endif
666}
667
668static void recsig(int i)
669{
670 intr_signal = i;
671}
672# endif
673
674/* Internal functions specific for Windows */
675# if defined(OPENSSL_SYS_MSDOS) && !defined(_WIN32)
676static int noecho_fgets(char *buf, int size, FILE *tty)
677{
678 int i;
679 char *p;
680
681 p = buf;
682 for (;;) {
683 if (size == 0) {
684 *p = '\0';
685 break;
686 }
687 size--;
688# if defined(_WIN32)
689 i = _getch();
690# else
691 i = getch();
692# endif
693 if (i == '\r')
694 i = '\n';
695 *(p++) = i;
696 if (i == '\n') {
697 *p = '\0';
698 break;
699 }
700 }
701# ifdef WIN_CONSOLE_BUG
702 /*
703 * Win95 has several evil console bugs: one of these is that the last
704 * character read using getch() is passed to the next read: this is
705 * usually a CR so this can be trouble. No STDIO fix seems to work but
706 * flushing the console appears to do the trick.
707 */
708 {
709 HANDLE inh;
710 inh = GetStdHandle(STD_INPUT_HANDLE);
711 FlushConsoleInputBuffer(inh);
712 }
713# endif
714 return strlen(buf);
715}
716# endif
717
718static UI_METHOD ui_openssl = {
719 "OpenSSL default user interface",
720 open_console,
721 write_string,
722 NULL, /* No flusher is needed for command lines */
723 read_string,
724 close_console,
725 NULL
726};
727
728/* The method with all the built-in console thingies */
729UI_METHOD *UI_OpenSSL(void)
730{
731 return &ui_openssl;
732}
733
734static const UI_METHOD *default_UI_meth = &ui_openssl;
735
736#else
737
738static const UI_METHOD *default_UI_meth = NULL;
739
740#endif
741
742void UI_set_default_method(const UI_METHOD *meth)
743{
744 default_UI_meth = meth;
745}
746
747const UI_METHOD *UI_get_default_method(void)
748{
749 return default_UI_meth;
750}
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