crypto/ui/ui_openssl.c

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