1 /* 2 * Copyright 2001-2020 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 */ 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 } 223 224 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 */ 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 279 280 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. */ 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$_NORMAL)) 489 is_a_tty = 0; 490 # endif 491 return 1; 492 } 493 494 static int noecho_console(UI *ui) 495 { 496 # ifdef TTY_FLAGS 497 memcpy(&(tty_new), &(tty_orig), sizeof(tty_orig)); 498 tty_new.TTY_FLAGS &= ~ECHO; 499 # endif 500 501 # if defined(TTY_set) && !defined(OPENSSL_SYS_VMS) 502 if (is_a_tty && (TTY_set(fileno(tty_in), &tty_new) == -1)) 503 return 0; 504 # endif 505 # ifdef OPENSSL_SYS_VMS 506 if (is_a_tty) { 507 tty_new[0] = tty_orig[0]; 508 tty_new[1] = tty_orig[1] | TT$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$w_value=", tmp_num[1]); 522 return 0; 523 } 524 } 525 # endif 526 # if defined(_WIN32) && !defined(_WIN32_WCE) 527 if (is_a_tty) { 528 tty_new = tty_orig; 529 tty_new &= ~ENABLE_ECHO_INPUT; 530 SetConsoleMode(GetStdHandle(STD_INPUT_HANDLE), tty_new); 531 } 532 # endif 533 return 1; 534 } 535 536 static int echo_console(UI *ui) 537 { 538 # if defined(TTY_set) && !defined(OPENSSL_SYS_VMS) 539 memcpy(&(tty_new), &(tty_orig), sizeof(tty_orig)); 540 if (is_a_tty && (TTY_set(fileno(tty_in), &tty_new) == -1)) 541 return 0; 542 # endif 543 # ifdef OPENSSL_SYS_VMS 544 if (is_a_tty) { 545 tty_new[0] = tty_orig[0]; 546 tty_new[1] = tty_orig[1]; 547 tty_new[2] = tty_orig[2]; 548 status = sys$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 } 572 573 static int close_console(UI *ui) 574 { 575 if (tty_in != stdin) 576 fclose(tty_in); 577 if (tty_out != stderr) 578 fclose(tty_out); 579 # ifdef OPENSSL_SYS_VMS 580 status = sys$dassgn(channel); 581 if (status != SS$_NORMAL) { 582 char tmp_num[12]; 583 584 BIO_snprintf(tmp_num, sizeof(tmp_num) - 1, "%%X%08X", status); 585 UIerr(UI_F_CLOSE_CONSOLE, UI_R_SYSDASSGN_ERROR); 586 ERR_add_error_data(2, "status=", tmp_num); 587 return 0; 588 } 589 # endif 590 CRYPTO_THREAD_unlock(ui->lock); 591 592 return 1; 593 } 594 595 # if !defined(OPENSSL_SYS_WINCE) 596 /* Internal functions to handle signals and act on them */ 597 static void pushsig(void) 598 { 599 # ifndef OPENSSL_SYS_WIN32 600 int i; 601 # endif 602 # ifdef SIGACTION 603 struct sigaction sa; 604 605 memset(&sa, 0, sizeof(sa)); 606 sa.sa_handler = recsig; 607 # endif 608 609 # ifdef OPENSSL_SYS_WIN32 610 savsig[SIGABRT] = signal(SIGABRT, recsig); 611 savsig[SIGFPE] = signal(SIGFPE, recsig); 612 savsig[SIGILL] = signal(SIGILL, recsig); 613 savsig[SIGINT] = signal(SIGINT, recsig); 614 savsig[SIGSEGV] = signal(SIGSEGV, recsig); 615 savsig[SIGTERM] = signal(SIGTERM, recsig); 616 # else 617 for (i = 1; i < NX509_SIG; i++) { 618 # ifdef SIGUSR1 619 if (i == SIGUSR1) 620 continue; 621 # endif 622 # ifdef SIGUSR2 623 if (i == SIGUSR2) 624 continue; 625 # endif 626 # ifdef SIGKILL 627 if (i == SIGKILL) /* We can't make any action on that. */ 628 continue; 629 # endif 630 # ifdef SIGACTION 631 sigaction(i, &sa, &savsig[i]); 632 # else 633 savsig[i] = signal(i, recsig); 634 # endif 635 } 636 # endif 637 638 # ifdef SIGWINCH 639 signal(SIGWINCH, SIG_DFL); 640 # endif 641 } 642 643 static void popsig(void) 644 { 645 # ifdef OPENSSL_SYS_WIN32 646 signal(SIGABRT, savsig[SIGABRT]); 647 signal(SIGFPE, savsig[SIGFPE]); 648 signal(SIGILL, savsig[SIGILL]); 649 signal(SIGINT, savsig[SIGINT]); 650 signal(SIGSEGV, savsig[SIGSEGV]); 651 signal(SIGTERM, savsig[SIGTERM]); 652 # else 653 int i; 654 for (i = 1; i < NX509_SIG; i++) { 655 # ifdef SIGUSR1 656 if (i == SIGUSR1) 657 continue; 658 # endif 659 # ifdef SIGUSR2 660 if (i == SIGUSR2) 661 continue; 662 # endif 663 # ifdef SIGACTION 664 sigaction(i, &savsig[i], NULL); 665 # else 666 signal(i, savsig[i]); 667 # endif 668 } 669 # endif 670 } 671 672 static void recsig(int i) 673 { 674 intr_signal = i; 675 } 676 # endif 677 678 /* Internal functions specific for Windows */ 679 # if defined(OPENSSL_SYS_MSDOS) && !defined(_WIN32) 680 static int noecho_fgets(char *buf, int size, FILE *tty) 681 { 682 int i; 683 char *p; 684 685 p = buf; 686 for (;;) { 687 if (size == 0) { 688 *p = '\0'; 689 break; 690 } 691 size--; 692 # if defined(_WIN32) 693 i = _getch(); 694 # else 695 i = getch(); 696 # endif 697 if (i == '\r') 698 i = '\n'; 699 *(p++) = i; 700 if (i == '\n') { 701 *p = '\0'; 702 break; 703 } 704 } 705 # ifdef WIN_CONSOLE_BUG 706 /* 707 * Win95 has several evil console bugs: one of these is that the last 708 * character read using getch() is passed to the next read: this is 709 * usually a CR so this can be trouble. No STDIO fix seems to work but 710 * flushing the console appears to do the trick. 711 */ 712 { 713 HANDLE inh; 714 inh = GetStdHandle(STD_INPUT_HANDLE); 715 FlushConsoleInputBuffer(inh); 716 } 717 # endif 718 return strlen(buf); 719 } 720 # endif 721 722 static UI_METHOD ui_openssl = { 723 "OpenSSL default user interface", 724 open_console, 725 write_string, 726 NULL, /* No flusher is needed for command lines */ 727 read_string, 728 close_console, 729 NULL 730 }; 731 732 /* The method with all the built-in console thingies */ 733 UI_METHOD *UI_OpenSSL(void) 734 { 735 return &ui_openssl; 736 } 737 738 static const UI_METHOD *default_UI_meth = &ui_openssl; 739 740 #else 741 742 static const UI_METHOD *default_UI_meth = NULL; 743 744 #endif 745 746 void UI_set_default_method(const UI_METHOD *meth) 747 { 748 default_UI_meth = meth; 749 } 750 751 const UI_METHOD *UI_get_default_method(void) 752 { 753 return default_UI_meth; 754 } 755