crypto/ui/ui_openssl.c

   1 /* crypto/ui/ui_openssl.c */
   2 /*
   3  * Written by Richard Levitte (richard@levitte.org) and others for the
   4  * OpenSSL project 2001.
   5  */
   6 /* ====================================================================
   7  * Copyright (c) 2001-2018 The OpenSSL Project.  All rights reserved.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  *
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  *
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in
  18  *    the documentation and/or other materials provided with the
  19  *    distribution.
  20  *
  21  * 3. All advertising materials mentioning features or use of this
  22  *    software must display the following acknowledgment:
  23  *    "This product includes software developed by the OpenSSL Project
  24  *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
  25  *
  26  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  27  *    endorse or promote products derived from this software without
  28  *    prior written permission. For written permission, please contact
  29  *    openssl-core@openssl.org.
  30  *
  31  * 5. Products derived from this software may not be called "OpenSSL"
  32  *    nor may "OpenSSL" appear in their names without prior written
  33  *    permission of the OpenSSL Project.
  34  *
  35  * 6. Redistributions of any form whatsoever must retain the following
  36  *    acknowledgment:
  37  *    "This product includes software developed by the OpenSSL Project
  38  *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
  39  *
  40  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  41  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  42  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  43  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  44  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  45  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  46  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  47  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  49  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  50  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  51  * OF THE POSSIBILITY OF SUCH DAMAGE.
  52  * ====================================================================
  53  *
  54  * This product includes cryptographic software written by Eric Young
  55  * (eay@cryptsoft.com).  This product includes software written by Tim
  56  * Hudson (tjh@cryptsoft.com).
  57  *
  58  */
  59
  60 /*-
  61  * The lowest level part of this file was previously in crypto/des/read_pwd.c,
  62  * Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
  63  * All rights reserved.
  64  *
  65  * This package is an SSL implementation written
  66  * by Eric Young (eay@cryptsoft.com).
  67  * The implementation was written so as to conform with Netscapes SSL.
  68  *
  69  * This library is free for commercial and non-commercial use as long as
  70  * the following conditions are aheared to.  The following conditions
  71  * apply to all code found in this distribution, be it the RC4, RSA,
  72  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  73  * included with this distribution is covered by the same copyright terms
  74  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
  75  *
  76  * Copyright remains Eric Young's, and as such any Copyright notices in
  77  * the code are not to be removed.
  78  * If this package is used in a product, Eric Young should be given attribution
  79  * as the author of the parts of the library used.
  80  * This can be in the form of a textual message at program startup or
  81  * in documentation (online or textual) provided with the package.
  82  *
  83  * Redistribution and use in source and binary forms, with or without
  84  * modification, are permitted provided that the following conditions
  85  * are met:
  86  * 1. Redistributions of source code must retain the copyright
  87  *    notice, this list of conditions and the following disclaimer.
  88  * 2. Redistributions in binary form must reproduce the above copyright
  89  *    notice, this list of conditions and the following disclaimer in the
  90  *    documentation and/or other materials provided with the distribution.
  91  * 3. All advertising materials mentioning features or use of this software
  92  *    must display the following acknowledgement:
  93  *    "This product includes cryptographic software written by
  94  *     Eric Young (eay@cryptsoft.com)"
  95  *    The word 'cryptographic' can be left out if the rouines from the library
  96  *    being used are not cryptographic related :-).
  97  * 4. If you include any Windows specific code (or a derivative thereof) from
  98  *    the apps directory (application code) you must include an acknowledgement:
  99  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
 100  *
 101  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
 102  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 103  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 104  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 105  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 106  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 107  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 108  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 109  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 110  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 111  * SUCH DAMAGE.
 112  *
 113  * The licence and distribution terms for any publically available version or
 114  * derivative of this code cannot be changed.  i.e. this code cannot simply be
 115  * copied and put under another distribution licence
 116  * [including the GNU Public Licence.]
 117  */
 118
 119 #include <openssl/e_os2.h>
 120
 121 /*
 122  * need for #define _POSIX_C_SOURCE arises whenever you pass -ansi to gcc
 123  * [maybe others?], because it masks interfaces not discussed in standard,
 124  * sigaction and fileno included. -pedantic would be more appropriate for the
 125  * intended purposes, but we can't prevent users from adding -ansi.
 126  */
 127 #if defined(OPENSSL_SYSNAME_VXWORKS)
 128 # include <sys/types.h>
 129 #endif
 130
 131 #if !defined(_POSIX_C_SOURCE) && defined(OPENSSL_SYS_VMS)
 132 # ifndef _POSIX_C_SOURCE
 133 #  define _POSIX_C_SOURCE 2
 134 # endif
 135 #endif
 136 #include <signal.h>
 137 #include <stdio.h>
 138 #include <string.h>
 139 #include <errno.h>
 140
 141 #if !defined(OPENSSL_SYS_MSDOS) && !defined(OPENSSL_SYS_VMS)
 142 # ifdef OPENSSL_UNISTD
 143 #  include OPENSSL_UNISTD
 144 # else
 145 #  include <unistd.h>
 146 # endif
 147 /*
 148  * If unistd.h defines _POSIX_VERSION, we conclude that we are on a POSIX
 149  * system and have sigaction and termios.
 150  */
 151 # if defined(_POSIX_VERSION)
 152
 153 #  define SIGACTION
 154 #  if !defined(TERMIOS) && !defined(TERMIO) && !defined(SGTTY)
 155 #   define TERMIOS
 156 #  endif
 157
 158 # endif
 159 #endif
 160
 161 #ifdef WIN16TTY
 162 # undef OPENSSL_SYS_WIN16
 163 # undef WIN16
 164 # undef _WINDOWS
 165 # include <graph.h>
 166 #endif
 167
 168 /* 06-Apr-92 Luke Brennan    Support for VMS */
 169 #include "ui_locl.h"
 170 #include "cryptlib.h"
 171
 172 #ifdef OPENSSL_SYS_VMS          /* prototypes for sys$whatever */
 173 # include <starlet.h>
 174 # ifdef __DECC
 175 #  pragma message disable DOLLARID
 176 # endif
 177 #endif
 178
 179 #ifdef WIN_CONSOLE_BUG
 180 # include <windows.h>
 181 # ifndef OPENSSL_SYS_WINCE
 182 #  include <wincon.h>
 183 # endif
 184 #endif
 185
 186 /*
 187  * There are 5 types of terminal interface supported, TERMIO, TERMIOS, VMS,
 188  * MSDOS and SGTTY.
 189  *
 190  * If someone defines one of the macros TERMIO, TERMIOS or SGTTY, it will
 191  * remain respected.  Otherwise, we default to TERMIOS except for a few
 192  * systems that require something different.
 193  *
 194  * Note: we do not use SGTTY unless it's defined by the configuration.  We
 195  * may eventually opt to remove it's use entirely.
 196  */
 197
 198 #if !defined(TERMIOS) && !defined(TERMIO) && !defined(SGTTY)
 199
 200 # if defined(_LIBC)
 201 #  undef  TERMIOS
 202 #  define TERMIO
 203 #  undef  SGTTY
 204 /*
 205  * We know that VMS, MSDOS, VXWORKS, NETWARE use entirely other mechanisms.
 206  * MAC_OS_GUSI_SOURCE should probably go away, but that needs to be confirmed.
 207  */
 208 # elif !defined(OPENSSL_SYS_VMS) \
 209         && !defined(OPENSSL_SYS_MSDOS) \
 210         && !defined(OPENSSL_SYS_MACINTOSH_CLASSIC) \
 211         && !defined(MAC_OS_GUSI_SOURCE) \
 212         && !defined(OPENSSL_SYS_VXWORKS) \
 213         && !defined(OPENSSL_SYS_NETWARE)
 214 #  define TERMIOS
 215 #  undef  TERMIO
 216 #  undef  SGTTY
 217 # endif
 218
 219 #endif
 220
 221 #ifdef TERMIOS
 222 # include <termios.h>
 223 # define TTY_STRUCT             struct termios
 224 # define TTY_FLAGS              c_lflag
 225 # define TTY_get(tty,data)      tcgetattr(tty,data)
 226 # define TTY_set(tty,data)      tcsetattr(tty,TCSANOW,data)
 227 #endif
 228
 229 #ifdef TERMIO
 230 # include <termio.h>
 231 # define TTY_STRUCT             struct termio
 232 # define TTY_FLAGS              c_lflag
 233 # define TTY_get(tty,data)      ioctl(tty,TCGETA,data)
 234 # define TTY_set(tty,data)      ioctl(tty,TCSETA,data)
 235 #endif
 236
 237 #ifdef SGTTY
 238 # include <sgtty.h>
 239 # define TTY_STRUCT             struct sgttyb
 240 # define TTY_FLAGS              sg_flags
 241 # define TTY_get(tty,data)      ioctl(tty,TIOCGETP,data)
 242 # define TTY_set(tty,data)      ioctl(tty,TIOCSETP,data)
 243 #endif
 244
 245 #if !defined(_LIBC) && !defined(OPENSSL_SYS_MSDOS) && !defined(OPENSSL_SYS_VMS) && !defined(OPENSSL_SYS_MACINTOSH_CLASSIC) && !defined(OPENSSL_SYS_SUNOS)
 246 # include <sys/ioctl.h>
 247 #endif
 248
 249 #ifdef OPENSSL_SYS_MSDOS
 250 # include <conio.h>
 251 #endif
 252
 253 #ifdef OPENSSL_SYS_VMS
 254 # include <ssdef.h>
 255 # include <iodef.h>
 256 # include <ttdef.h>
 257 # include <descrip.h>
 258 struct IOSB {
 259     short iosb$w_value;
 260     short iosb$w_count;
 261     long iosb$l_info;
 262 };
 263 #endif
 264
 265 #ifdef OPENSSL_SYS_SUNOS
 266 typedef int sig_atomic_t;
 267 #endif
 268
 269 #if defined(OPENSSL_SYS_MACINTOSH_CLASSIC) || defined(MAC_OS_GUSI_SOURCE) || defined(OPENSSL_SYS_NETWARE)
 270 /*
 271  * This one needs work. As a matter of fact the code is unoperational
 272  * and this is only a trick to get it compiled.
 273  *                                      <appro@fy.chalmers.se>
 274  */
 275 # define TTY_STRUCT int
 276 #endif
 277
 278 #ifndef NX509_SIG
 279 # define NX509_SIG 32
 280 #endif
 281
 282 /* Define globals.  They are protected by a lock */
 283 #ifdef SIGACTION
 284 static struct sigaction savsig[NX509_SIG];
 285 #else
 286 static void (*savsig[NX509_SIG]) (int);
 287 #endif
 288
 289 #ifdef OPENSSL_SYS_VMS
 290 static struct IOSB iosb;
 291 static $DESCRIPTOR(terminal, "TT");
 292 static long tty_orig[3], tty_new[3]; /* XXX Is there any guarantee that this
 293                                       * will always suffice for the actual
 294                                       * structures? */
 295 static long status;
 296 static unsigned short channel = 0;
 297 #else
 298 # if !defined(OPENSSL_SYS_MSDOS) || defined(__DJGPP__)
 299 static TTY_STRUCT tty_orig, tty_new;
 300 # endif
 301 #endif
 302 static FILE *tty_in, *tty_out;
 303 static int is_a_tty;
 304
 305 /* Declare static functions */
 306 #if !defined(OPENSSL_SYS_WIN16) && !defined(OPENSSL_SYS_WINCE)
 307 static int read_till_nl(FILE *);
 308 static void recsig(int);
 309 static void pushsig(void);
 310 static void popsig(void);
 311 #endif
 312 #if defined(OPENSSL_SYS_MSDOS) && !defined(OPENSSL_SYS_WIN16)
 313 static int noecho_fgets(char *buf, int size, FILE *tty);
 314 #endif
 315 static int read_string_inner(UI *ui, UI_STRING *uis, int echo, int strip_nl);
 316
 317 static int read_string(UI *ui, UI_STRING *uis);
 318 static int write_string(UI *ui, UI_STRING *uis);
 319
 320 static int open_console(UI *ui);
 321 static int echo_console(UI *ui);
 322 static int noecho_console(UI *ui);
 323 static int close_console(UI *ui);
 324
 325 static UI_METHOD ui_openssl = {
 326     "OpenSSL default user interface",
 327     open_console,
 328     write_string,
 329     NULL,                       /* No flusher is needed for command lines */
 330     read_string,
 331     close_console,
 332     NULL
 333 };
 334
 335 /* The method with all the built-in thingies */
 336 UI_METHOD *UI_OpenSSL(void)
 337 {
 338     return &ui_openssl;
 339 }
 340
 341 /*
 342  * The following function makes sure that info and error strings are printed
 343  * before any prompt.
 344  */
 345 static int write_string(UI *ui, UI_STRING *uis)
 346 {
 347     switch (UI_get_string_type(uis)) {
 348     case UIT_ERROR:
 349     case UIT_INFO:
 350         fputs(UI_get0_output_string(uis), tty_out);
 351         fflush(tty_out);
 352         break;
 353     default:
 354         break;
 355     }
 356     return 1;
 357 }
 358
 359 static int read_string(UI *ui, UI_STRING *uis)
 360 {
 361     int ok = 0;
 362
 363     switch (UI_get_string_type(uis)) {
 364     case UIT_BOOLEAN:
 365         fputs(UI_get0_output_string(uis), tty_out);
 366         fputs(UI_get0_action_string(uis), tty_out);
 367         fflush(tty_out);
 368         return read_string_inner(ui, uis,
 369                                  UI_get_input_flags(uis) & UI_INPUT_FLAG_ECHO,
 370                                  0);
 371     case UIT_PROMPT:
 372         fputs(UI_get0_output_string(uis), tty_out);
 373         fflush(tty_out);
 374         return read_string_inner(ui, uis,
 375                                  UI_get_input_flags(uis) & UI_INPUT_FLAG_ECHO,
 376                                  1);
 377     case UIT_VERIFY:
 378         fprintf(tty_out, "Verifying - %s", UI_get0_output_string(uis));
 379         fflush(tty_out);
 380         if ((ok = read_string_inner(ui, uis,
 381                                     UI_get_input_flags(uis) &
 382                                     UI_INPUT_FLAG_ECHO, 1)) <= 0)
 383             return ok;
 384         if (strcmp(UI_get0_result_string(uis), UI_get0_test_string(uis)) != 0) {
 385             fprintf(tty_out, "Verify failure\n");
 386             fflush(tty_out);
 387             return 0;
 388         }
 389         break;
 390     default:
 391         break;
 392     }
 393     return 1;
 394 }
 395
 396 #if !defined(OPENSSL_SYS_WIN16) && !defined(OPENSSL_SYS_WINCE)
 397 /* Internal functions to read a string without echoing */
 398 static int read_till_nl(FILE *in)
 399 {
 400 # define SIZE 4
 401     char buf[SIZE + 1];
 402
 403     do {
 404         if (!fgets(buf, SIZE, in))
 405             return 0;
 406     } while (strchr(buf, '\n') == NULL);
 407     return 1;
 408 }
 409
 410 static volatile sig_atomic_t intr_signal;
 411 #endif
 412
 413 static int read_string_inner(UI *ui, UI_STRING *uis, int echo, int strip_nl)
 414 {
 415     static int ps;
 416     int ok;
 417     char result[BUFSIZ];
 418     int maxsize = BUFSIZ - 1;
 419 #if !defined(OPENSSL_SYS_WIN16) && !defined(OPENSSL_SYS_WINCE)
 420     char *p;
 421
 422     intr_signal = 0;
 423     ok = 0;
 424     ps = 0;
 425
 426     pushsig();
 427     ps = 1;
 428
 429     if (!echo && !noecho_console(ui))
 430         goto error;
 431     ps = 2;
 432
 433     result[0] = '\0';
 434 # ifdef OPENSSL_SYS_MSDOS
 435     if (!echo) {
 436         noecho_fgets(result, maxsize, tty_in);
 437         p = result;             /* FIXME: noecho_fgets doesn't return errors */
 438     } else
 439         p = fgets(result, maxsize, tty_in);
 440 # else
 441     p = fgets(result, maxsize, tty_in);
 442 # endif
 443     if (p == NULL)
 444         goto error;
 445     if (feof(tty_in))
 446         goto error;
 447     if (ferror(tty_in))
 448         goto error;
 449     if ((p = (char *)strchr(result, '\n')) != NULL) {
 450         if (strip_nl)
 451             *p = '\0';
 452     } else if (!read_till_nl(tty_in))
 453         goto error;
 454     if (UI_set_result(ui, uis, result) >= 0)
 455         ok = 1;
 456
 457  error:
 458     if (intr_signal == SIGINT)
 459         ok = -1;
 460     if (!echo)
 461         fprintf(tty_out, "\n");
 462     if (ps >= 2 && !echo && !echo_console(ui))
 463         ok = 0;
 464
 465     if (ps >= 1)
 466         popsig();
 467 #else
 468     ok = 1;
 469 #endif
 470
 471     OPENSSL_cleanse(result, BUFSIZ);
 472     return ok;
 473 }
 474
 475 /* Internal functions to open, handle and close a channel to the console.  */
 476 static int open_console(UI *ui)
 477 {
 478     CRYPTO_w_lock(CRYPTO_LOCK_UI);
 479     is_a_tty = 1;
 480
 481 #if defined(OPENSSL_SYS_MACINTOSH_CLASSIC) || defined(OPENSSL_SYS_VXWORKS) || defined(OPENSSL_SYS_NETWARE) || defined(OPENSSL_SYS_BEOS)
 482     tty_in = stdin;
 483     tty_out = stderr;
 484 #else
 485 # ifdef OPENSSL_SYS_MSDOS
 486 #  define DEV_TTY "con"
 487 # else
 488 #  define DEV_TTY "/dev/tty"
 489 # endif
 490     if ((tty_in = fopen(DEV_TTY, "r")) == NULL)
 491         tty_in = stdin;
 492     if ((tty_out = fopen(DEV_TTY, "w")) == NULL)
 493         tty_out = stderr;
 494 #endif
 495
 496 #if defined(TTY_get) && !defined(OPENSSL_SYS_VMS)
 497     if (TTY_get(fileno(tty_in), &tty_orig) == -1) {
 498 # ifdef ENOTTY
 499         if (errno == ENOTTY)
 500             is_a_tty = 0;
 501         else
 502 # endif
 503 # ifdef EINVAL
 504             /*
 505              * Ariel Glenn ariel@columbia.edu reports that solaris can return
 506              * EINVAL instead.  This should be ok
 507              */
 508         if (errno == EINVAL)
 509             is_a_tty = 0;
 510         else
 511 # endif
 512 # ifdef ENODEV
 513             /*
 514              * MacOS X returns ENODEV (Operation not supported by device),
 515              * which seems appropriate.
 516              */
 517         if (errno == ENODEV)
 518             is_a_tty = 0;
 519         else
 520 # endif
 521             return 0;
 522     }
 523 #endif
 524 #ifdef OPENSSL_SYS_VMS
 525     status = sys$assign(&terminal, &channel, 0, 0);
 526
 527     /* if there isn't a TT device, something is very wrong */
 528     if (status != SS$_NORMAL)
 529         return 0;
 530
 531     status = sys$qiow(0, channel, IO$_SENSEMODE, &iosb, 0, 0, tty_orig, 12,
 532                       0, 0, 0, 0);
 533
 534     /* If IO$_SENSEMODE doesn't work, this is not a terminal device */
 535     if ((status != SS$_NORMAL) || (iosb.iosb$w_value != SS$_NORMAL))
 536         is_a_tty = 0;
 537 #endif
 538     return 1;
 539 }
 540
 541 static int noecho_console(UI *ui)
 542 {
 543 #ifdef TTY_FLAGS
 544     memcpy(&(tty_new), &(tty_orig), sizeof(tty_orig));
 545     tty_new.TTY_FLAGS &= ~ECHO;
 546 #endif
 547
 548 #if defined(TTY_set) && !defined(OPENSSL_SYS_VMS)
 549     if (is_a_tty && (TTY_set(fileno(tty_in), &tty_new) == -1))
 550         return 0;
 551 #endif
 552 #ifdef OPENSSL_SYS_VMS
 553     if (is_a_tty) {
 554         tty_new[0] = tty_orig[0];
 555         tty_new[1] = tty_orig[1] | TT$M_NOECHO;
 556         tty_new[2] = tty_orig[2];
 557         status = sys$qiow(0, channel, IO$_SETMODE, &iosb, 0, 0, tty_new, 12,
 558                           0, 0, 0, 0);
 559         if ((status != SS$_NORMAL) || (iosb.iosb$w_value != SS$_NORMAL))
 560             return 0;
 561     }
 562 #endif
 563     return 1;
 564 }
 565
 566 static int echo_console(UI *ui)
 567 {
 568 #if defined(TTY_set) && !defined(OPENSSL_SYS_VMS)
 569     memcpy(&(tty_new), &(tty_orig), sizeof(tty_orig));
 570     if (is_a_tty && (TTY_set(fileno(tty_in), &tty_new) == -1))
 571         return 0;
 572 #endif
 573 #ifdef OPENSSL_SYS_VMS
 574     if (is_a_tty) {
 575         tty_new[0] = tty_orig[0];
 576         tty_new[1] = tty_orig[1];
 577         tty_new[2] = tty_orig[2];
 578         status = sys$qiow(0, channel, IO$_SETMODE, &iosb, 0, 0, tty_new, 12,
 579                           0, 0, 0, 0);
 580         if ((status != SS$_NORMAL) || (iosb.iosb$w_value != SS$_NORMAL))
 581             return 0;
 582     }
 583 #endif
 584     return 1;
 585 }
 586
 587 static int close_console(UI *ui)
 588 {
 589     if (tty_in != stdin)
 590         fclose(tty_in);
 591     if (tty_out != stderr)
 592         fclose(tty_out);
 593 #ifdef OPENSSL_SYS_VMS
 594     status = sys$dassgn(channel);
 595     if (status != SS$_NORMAL)
 596         return 0;
 597 #endif
 598     CRYPTO_w_unlock(CRYPTO_LOCK_UI);
 599
 600     return 1;
 601 }
 602
 603 #if !defined(OPENSSL_SYS_WIN16) && !defined(OPENSSL_SYS_WINCE)
 604 /* Internal functions to handle signals and act on them */
 605 static void pushsig(void)
 606 {
 607 # ifndef OPENSSL_SYS_WIN32
 608     int i;
 609 # endif
 610 # ifdef SIGACTION
 611     struct sigaction sa;
 612
 613     memset(&sa, 0, sizeof(sa));
 614     sa.sa_handler = recsig;
 615 # endif
 616
 617 # ifdef OPENSSL_SYS_WIN32
 618     savsig[SIGABRT] = signal(SIGABRT, recsig);
 619     savsig[SIGFPE] = signal(SIGFPE, recsig);
 620     savsig[SIGILL] = signal(SIGILL, recsig);
 621     savsig[SIGINT] = signal(SIGINT, recsig);
 622     savsig[SIGSEGV] = signal(SIGSEGV, recsig);
 623     savsig[SIGTERM] = signal(SIGTERM, recsig);
 624 # else
 625     for (i = 1; i < NX509_SIG; i++) {
 626 #  ifdef SIGUSR1
 627         if (i == SIGUSR1)
 628             continue;
 629 #  endif
 630 #  ifdef SIGUSR2
 631         if (i == SIGUSR2)
 632             continue;
 633 #  endif
 634 #  ifdef SIGKILL
 635         if (i == SIGKILL)       /* We can't make any action on that. */
 636             continue;
 637 #  endif
 638 #  ifdef SIGACTION
 639         sigaction(i, &sa, &savsig[i]);
 640 #  else
 641         savsig[i] = signal(i, recsig);
 642 #  endif
 643     }
 644 # endif
 645
 646 # ifdef SIGWINCH
 647     signal(SIGWINCH, SIG_DFL);
 648 # endif
 649 }
 650
 651 static void popsig(void)
 652 {
 653 # ifdef OPENSSL_SYS_WIN32
 654     signal(SIGABRT, savsig[SIGABRT]);
 655     signal(SIGFPE, savsig[SIGFPE]);
 656     signal(SIGILL, savsig[SIGILL]);
 657     signal(SIGINT, savsig[SIGINT]);
 658     signal(SIGSEGV, savsig[SIGSEGV]);
 659     signal(SIGTERM, savsig[SIGTERM]);
 660 # else
 661     int i;
 662     for (i = 1; i < NX509_SIG; i++) {
 663 #  ifdef SIGUSR1
 664         if (i == SIGUSR1)
 665             continue;
 666 #  endif
 667 #  ifdef SIGUSR2
 668         if (i == SIGUSR2)
 669             continue;
 670 #  endif
 671 #  ifdef SIGACTION
 672         sigaction(i, &savsig[i], NULL);
 673 #  else
 674         signal(i, savsig[i]);
 675 #  endif
 676     }
 677 # endif
 678 }
 679
 680 static void recsig(int i)
 681 {
 682     intr_signal = i;
 683 }
 684 #endif
 685
 686 /* Internal functions specific for Windows */
 687 #if defined(OPENSSL_SYS_MSDOS) && !defined(OPENSSL_SYS_WIN16) && !defined(OPENSSL_SYS_WINCE)
 688 static int noecho_fgets(char *buf, int size, FILE *tty)
 689 {
 690     int i;
 691     char *p;
 692
 693     p = buf;
 694     for (;;) {
 695         if (size == 0) {
 696             *p = '\0';
 697             break;
 698         }
 699         size--;
 700 # ifdef WIN16TTY
 701         i = _inchar();
 702 # elif defined(_WIN32)
 703         i = _getch();
 704 # else
 705         i = getch();
 706 # endif
 707         if (i == '\r')
 708             i = '\n';
 709         *(p++) = i;
 710         if (i == '\n') {
 711             *p = '\0';
 712             break;
 713         }
 714     }
 715 # ifdef WIN_CONSOLE_BUG
 716     /*
 717      * Win95 has several evil console bugs: one of these is that the last
 718      * character read using getch() is passed to the next read: this is
 719      * usually a CR so this can be trouble. No STDIO fix seems to work but
 720      * flushing the console appears to do the trick.
 721      */
 722     {
 723         HANDLE inh;
 724         inh = GetStdHandle(STD_INPUT_HANDLE);
 725         FlushConsoleInputBuffer(inh);
 726     }
 727 # endif
 728     return (strlen(buf));
 729 }
 730 #endif