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 #define _POSIX_C_SOURCE 1
 121 #include <signal.h>
 122 #include <stdio.h>
 123 #undef _POSIX_C_SOURCE
 124 #include <string.h>
 125 #include <errno.h>
 126
 127 #if !defined(OPENSSL_SYS_MSDOS) && !defined(OPENSSL_SYS_VMS)
 128 # ifdef OPENSSL_UNISTD
 129 #  include OPENSSL_UNISTD
 130 # else
 131 #  include <unistd.h>
 132 # endif
 133 /* If unistd.h defines _POSIX_VERSION, we conclude that we
 134  * are on a POSIX system and have sigaction and termios. */
 135 # if defined(_POSIX_VERSION)
 136
 137 #  define SIGACTION
 138 #  if !defined(TERMIOS) && !defined(TERMIO) && !defined(SGTTY)
 139 #   define TERMIOS
 140 #  endif
 141
 142 # endif
 143 #endif
 144
 145 #ifdef WIN16TTY
 146 # undef OPENSSL_SYS_WIN16
 147 # undef WIN16
 148 # undef _WINDOWS
 149 # include <graph.h>
 150 #endif
 151
 152 /* 06-Apr-92 Luke Brennan    Support for VMS */
 153 #include "ui_locl.h"
 154 #include "cryptlib.h"
 155
 156 #ifdef OPENSSL_SYS_VMS          /* prototypes for sys$whatever */
 157 # include <starlet.h>
 158 # ifdef __DECC
 159 #  pragma message disable DOLLARID
 160 # endif
 161 #endif
 162
 163 #ifdef WIN_CONSOLE_BUG
 164 # include <windows.h>
 165 #ifndef OPENSSL_SYS_WINCE
 166 # include <wincon.h>
 167 #endif
 168 #endif
 169
 170
 171 /* There are 5 types of terminal interface supported,
 172  * TERMIO, TERMIOS, VMS, MSDOS and SGTTY
 173  */
 174
 175 #if defined(__sgi) && !defined(TERMIOS)
 176 # define TERMIOS
 177 # undef  TERMIO
 178 # undef  SGTTY
 179 #endif
 180
 181 #if defined(linux) && !defined(TERMIO)
 182 # undef  TERMIOS
 183 # define TERMIO
 184 # undef  SGTTY
 185 #endif
 186
 187 #ifdef _LIBC
 188 # undef  TERMIOS
 189 # define TERMIO
 190 # undef  SGTTY
 191 #endif
 192
 193 #if !defined(TERMIO) && !defined(TERMIOS) && !defined(OPENSSL_SYS_VMS) && !defined(OPENSSL_SYS_MSDOS) && !defined(OPENSSL_SYS_MACINTOSH_CLASSIC) && !defined(MAC_OS_GUSI_SOURCE)
 194 # undef  TERMIOS
 195 # undef  TERMIO
 196 # define SGTTY
 197 #endif
 198
 199 #if defined(OPENSSL_SYS_VXWORKS)
 200 #undef TERMIOS
 201 #undef TERMIO
 202 #undef SGTTY
 203 #endif
 204
 205 #if defined(OPENSSL_SYS_NETWARE)
 206 #undef TERMIOS
 207 #undef TERMIO
 208 #undef SGTTY
 209 #endif
 210
 211 #ifdef TERMIOS
 212 # include <termios.h>
 213 # define TTY_STRUCT             struct termios
 214 # define TTY_FLAGS              c_lflag
 215 # define TTY_get(tty,data)      tcgetattr(tty,data)
 216 # define TTY_set(tty,data)      tcsetattr(tty,TCSANOW,data)
 217 #endif
 218
 219 #ifdef TERMIO
 220 # include <termio.h>
 221 # define TTY_STRUCT             struct termio
 222 # define TTY_FLAGS              c_lflag
 223 # define TTY_get(tty,data)      ioctl(tty,TCGETA,data)
 224 # define TTY_set(tty,data)      ioctl(tty,TCSETA,data)
 225 #endif
 226
 227 #ifdef SGTTY
 228 # include <sgtty.h>
 229 # define TTY_STRUCT             struct sgttyb
 230 # define TTY_FLAGS              sg_flags
 231 # define TTY_get(tty,data)      ioctl(tty,TIOCGETP,data)
 232 # define TTY_set(tty,data)      ioctl(tty,TIOCSETP,data)
 233 #endif
 234
 235 #if !defined(_LIBC) && !defined(OPENSSL_SYS_MSDOS) && !defined(OPENSSL_SYS_VMS) && !defined(OPENSSL_SYS_MACINTOSH_CLASSIC) && !defined(OPENSSL_SYS_SUNOS)
 236 # include <sys/ioctl.h>
 237 #endif
 238
 239 #ifdef OPENSSL_SYS_MSDOS
 240 # include <conio.h>
 241 #endif
 242
 243 #ifdef OPENSSL_SYS_VMS
 244 # include <ssdef.h>
 245 # include <iodef.h>
 246 # include <ttdef.h>
 247 # include <descrip.h>
 248 struct IOSB {
 249         short iosb$w_value;
 250         short iosb$w_count;
 251         long  iosb$l_info;
 252         };
 253 #endif
 254
 255 #ifdef OPENSSL_SYS_SUNOS
 256         typedef int sig_atomic_t;
 257 #endif
 258
 259 #if defined(OPENSSL_SYS_MACINTOSH_CLASSIC) || defined(MAC_OS_GUSI_SOURCE) || defined(OPENSSL_SYS_NETWARE)
 260 /*
 261  * This one needs work. As a matter of fact the code is unoperational
 262  * and this is only a trick to get it compiled.
 263  *                                      <appro@fy.chalmers.se>
 264  */
 265 # define TTY_STRUCT int
 266 #endif
 267
 268 #ifndef NX509_SIG
 269 # define NX509_SIG 32
 270 #endif
 271
 272
 273 /* Define globals.  They are protected by a lock */
 274 #ifdef SIGACTION
 275 static struct sigaction savsig[NX509_SIG];
 276 #else
 277 static void (*savsig[NX509_SIG])(int );
 278 #endif
 279
 280 #ifdef OPENSSL_SYS_VMS
 281 static struct IOSB iosb;
 282 static $DESCRIPTOR(terminal,"TT");
 283 static long tty_orig[3], tty_new[3]; /* XXX   Is there any guarantee that this will always suffice for the actual structures? */
 284 static long status;
 285 static unsigned short channel = 0;
 286 #else
 287 #if !defined(OPENSSL_SYS_MSDOS) || defined(__DJGPP__)
 288 static TTY_STRUCT tty_orig,tty_new;
 289 #endif
 290 #endif
 291 static FILE *tty_in, *tty_out;
 292 static int is_a_tty;
 293
 294 /* Declare static functions */
 295 #if !defined(OPENSSL_SYS_WIN16) && !defined(OPENSSL_SYS_WINCE)
 296 static void read_till_nl(FILE *);
 297 static void recsig(int);
 298 static void pushsig(void);
 299 static void popsig(void);
 300 #endif
 301 #if defined(OPENSSL_SYS_MSDOS) && !defined(OPENSSL_SYS_WIN16)
 302 static int noecho_fgets(char *buf, int size, FILE *tty);
 303 #endif
 304 static int read_string_inner(UI *ui, UI_STRING *uis, int echo, int strip_nl);
 305
 306 static int read_string(UI *ui, UI_STRING *uis);
 307 static int write_string(UI *ui, UI_STRING *uis);
 308
 309 static int open_console(UI *ui);
 310 static int echo_console(UI *ui);
 311 static int noecho_console(UI *ui);
 312 static int close_console(UI *ui);
 313
 314 static UI_METHOD ui_openssl =
 315         {
 316         "OpenSSL default user interface",
 317         open_console,
 318         write_string,
 319         NULL,                   /* No flusher is needed for command lines */
 320         read_string,
 321         close_console,
 322         NULL
 323         };
 324
 325 /* The method with all the built-in thingies */
 326 UI_METHOD *UI_OpenSSL(void)
 327         {
 328         return &ui_openssl;
 329         }
 330
 331 /* The following function makes sure that info and error strings are printed
 332    before any prompt. */
 333 static int write_string(UI *ui, UI_STRING *uis)
 334         {
 335         switch (UI_get_string_type(uis))
 336                 {
 337         case UIT_ERROR:
 338         case UIT_INFO:
 339                 fputs(UI_get0_output_string(uis), tty_out);
 340                 fflush(tty_out);
 341                 break;
 342         default:
 343                 break;
 344                 }
 345         return 1;
 346         }
 347
 348 static int read_string(UI *ui, UI_STRING *uis)
 349         {
 350         int ok = 0;
 351
 352         switch (UI_get_string_type(uis))
 353                 {
 354         case UIT_BOOLEAN:
 355                 fputs(UI_get0_output_string(uis), tty_out);
 356                 fputs(UI_get0_action_string(uis), tty_out);
 357                 fflush(tty_out);
 358                 return read_string_inner(ui, uis,
 359                         UI_get_input_flags(uis) & UI_INPUT_FLAG_ECHO, 0);
 360         case UIT_PROMPT:
 361                 fputs(UI_get0_output_string(uis), tty_out);
 362                 fflush(tty_out);
 363                 return read_string_inner(ui, uis,
 364                         UI_get_input_flags(uis) & UI_INPUT_FLAG_ECHO, 1);
 365         case UIT_VERIFY:
 366                 fprintf(tty_out,"Verifying - %s",
 367                         UI_get0_output_string(uis));
 368                 fflush(tty_out);
 369                 if ((ok = read_string_inner(ui, uis,
 370                         UI_get_input_flags(uis) & UI_INPUT_FLAG_ECHO, 1)) <= 0)
 371                         return ok;
 372                 if (strcmp(UI_get0_result_string(uis),
 373                         UI_get0_test_string(uis)) != 0)
 374                         {
 375                         fprintf(tty_out,"Verify failure\n");
 376                         fflush(tty_out);
 377                         return 0;
 378                         }
 379                 break;
 380         default:
 381                 break;
 382                 }
 383         return 1;
 384         }
 385
 386
 387 #if !defined(OPENSSL_SYS_WIN16) && !defined(OPENSSL_SYS_WINCE)
 388 /* Internal functions to read a string without echoing */
 389 static void read_till_nl(FILE *in)
 390         {
 391 #define SIZE 4
 392         char buf[SIZE+1];
 393
 394         do      {
 395                 fgets(buf,SIZE,in);
 396                 } while (strchr(buf,'\n') == NULL);
 397         }
 398
 399 static volatile sig_atomic_t intr_signal;
 400 #endif
 401
 402 static int read_string_inner(UI *ui, UI_STRING *uis, int echo, int strip_nl)
 403         {
 404         static int ps;
 405         int ok;
 406         char result[BUFSIZ];
 407         int maxsize = BUFSIZ-1;
 408 #if !defined(OPENSSL_SYS_WIN16) && !defined(OPENSSL_SYS_WINCE)
 409         char *p;
 410
 411         intr_signal=0;
 412         ok=0;
 413         ps=0;
 414
 415         pushsig();
 416         ps=1;
 417
 418         if (!echo && !noecho_console(ui))
 419                 goto error;
 420         ps=2;
 421
 422         result[0]='\0';
 423 #ifdef OPENSSL_SYS_MSDOS
 424         if (!echo)
 425                 {
 426                 noecho_fgets(result,maxsize,tty_in);
 427                 p=result; /* FIXME: noecho_fgets doesn't return errors */
 428                 }
 429         else
 430                 p=fgets(result,maxsize,tty_in);
 431 #else
 432         p=fgets(result,maxsize,tty_in);
 433 #endif
 434         if(!p)
 435                 goto error;
 436         if (feof(tty_in)) goto error;
 437         if (ferror(tty_in)) goto error;
 438         if ((p=(char *)strchr(result,'\n')) != NULL)
 439                 {
 440                 if (strip_nl)
 441                         *p='\0';
 442                 }
 443         else
 444                 read_till_nl(tty_in);
 445         if (UI_set_result(ui, uis, result) >= 0)
 446                 ok=1;
 447
 448 error:
 449         if (intr_signal == SIGINT)
 450                 ok=-1;
 451         if (!echo) fprintf(tty_out,"\n");
 452         if (ps >= 2 && !echo && !echo_console(ui))
 453                 ok=0;
 454
 455         if (ps >= 1)
 456                 popsig();
 457 #else
 458         ok=1;
 459 #endif
 460
 461         OPENSSL_cleanse(result,BUFSIZ);
 462         return ok;
 463         }
 464
 465
 466 /* Internal functions to open, handle and close a channel to the console.  */
 467 static int open_console(UI *ui)
 468         {
 469         CRYPTO_w_lock(CRYPTO_LOCK_UI);
 470         is_a_tty = 1;
 471
 472 #if defined(OPENSSL_SYS_MACINTOSH_CLASSIC) || defined(OPENSSL_SYS_VXWORKS) || defined(OPENSSL_SYS_NETWARE)
 473         tty_in=stdin;
 474         tty_out=stderr;
 475 #else
 476 #  ifdef OPENSSL_SYS_MSDOS
 477 #    define DEV_TTY "con"
 478 #  else
 479 #    define DEV_TTY "/dev/tty"
 480 #  endif
 481         if ((tty_in=fopen(DEV_TTY,"r")) == NULL)
 482                 tty_in=stdin;
 483         if ((tty_out=fopen(DEV_TTY,"w")) == NULL)
 484                 tty_out=stderr;
 485 #endif
 486
 487 #if defined(TTY_get) && !defined(OPENSSL_SYS_VMS)
 488         if (TTY_get(fileno(tty_in),&tty_orig) == -1)
 489                 {
 490 #ifdef ENOTTY
 491                 if (errno == ENOTTY)
 492                         is_a_tty=0;
 493                 else
 494 #endif
 495 #ifdef EINVAL
 496                 /* Ariel Glenn ariel@columbia.edu reports that solaris
 497                  * can return EINVAL instead.  This should be ok */
 498                 if (errno == EINVAL)
 499                         is_a_tty=0;
 500                 else
 501 #endif
 502                         return 0;
 503                 }
 504 #endif
 505 #ifdef OPENSSL_SYS_VMS
 506         status = sys$assign(&terminal,&channel,0,0);
 507         if (status != SS$_NORMAL)
 508                 return 0;
 509         status=sys$qiow(0,channel,IO$_SENSEMODE,&iosb,0,0,tty_orig,12,0,0,0,0);
 510         if ((status != SS$_NORMAL) || (iosb.iosb$w_value != SS$_NORMAL))
 511                 return 0;
 512 #endif
 513         return 1;
 514         }
 515
 516 static int noecho_console(UI *ui)
 517         {
 518 #ifdef TTY_FLAGS
 519         memcpy(&(tty_new),&(tty_orig),sizeof(tty_orig));
 520         tty_new.TTY_FLAGS &= ~ECHO;
 521 #endif
 522
 523 #if defined(TTY_set) && !defined(OPENSSL_SYS_VMS)
 524         if (is_a_tty && (TTY_set(fileno(tty_in),&tty_new) == -1))
 525                 return 0;
 526 #endif
 527 #ifdef OPENSSL_SYS_VMS
 528         tty_new[0] = tty_orig[0];
 529         tty_new[1] = tty_orig[1] | TT$M_NOECHO;
 530         tty_new[2] = tty_orig[2];
 531         status = sys$qiow(0,channel,IO$_SETMODE,&iosb,0,0,tty_new,12,0,0,0,0);
 532         if ((status != SS$_NORMAL) || (iosb.iosb$w_value != SS$_NORMAL))
 533                 return 0;
 534 #endif
 535         return 1;
 536         }
 537
 538 static int echo_console(UI *ui)
 539         {
 540 #if defined(TTY_set) && !defined(OPENSSL_SYS_VMS)
 541         memcpy(&(tty_new),&(tty_orig),sizeof(tty_orig));
 542         tty_new.TTY_FLAGS |= ECHO;
 543 #endif
 544
 545 #if defined(TTY_set) && !defined(OPENSSL_SYS_VMS)
 546         if (is_a_tty && (TTY_set(fileno(tty_in),&tty_new) == -1))
 547                 return 0;
 548 #endif
 549 #ifdef OPENSSL_SYS_VMS
 550         tty_new[0] = tty_orig[0];
 551         tty_new[1] = tty_orig[1] & ~TT$M_NOECHO;
 552         tty_new[2] = tty_orig[2];
 553         status = sys$qiow(0,channel,IO$_SETMODE,&iosb,0,0,tty_new,12,0,0,0,0);
 554         if ((status != SS$_NORMAL) || (iosb.iosb$w_value != SS$_NORMAL))
 555                 return 0;
 556 #endif
 557         return 1;
 558         }
 559
 560 static int close_console(UI *ui)
 561         {
 562         if (tty_in != stdin) fclose(tty_in);
 563         if (tty_out != stderr) fclose(tty_out);
 564 #ifdef OPENSSL_SYS_VMS
 565         status = sys$dassgn(channel);
 566 #endif
 567         CRYPTO_w_unlock(CRYPTO_LOCK_UI);
 568
 569         return 1;
 570         }
 571
 572
 573 #if !defined(OPENSSL_SYS_WIN16) && !defined(OPENSSL_SYS_WINCE)
 574 /* Internal functions to handle signals and act on them */
 575 static void pushsig(void)
 576         {
 577         int i;
 578 #ifdef SIGACTION
 579         struct sigaction sa;
 580
 581         memset(&sa,0,sizeof sa);
 582         sa.sa_handler=recsig;
 583 #endif
 584
 585         for (i=1; i<NX509_SIG; i++)
 586                 {
 587 #ifdef SIGUSR1
 588                 if (i == SIGUSR1)
 589                         continue;
 590 #endif
 591 #ifdef SIGUSR2
 592                 if (i == SIGUSR2)
 593                         continue;
 594 #endif
 595 #ifdef SIGKILL
 596                 if (i == SIGKILL) /* We can't make any action on that. */
 597                         continue;
 598 #endif
 599 #ifdef SIGACTION
 600                 sigaction(i,&sa,&savsig[i]);
 601 #else
 602                 savsig[i]=signal(i,recsig);
 603 #endif
 604                 }
 605
 606 #ifdef SIGWINCH
 607         signal(SIGWINCH,SIG_DFL);
 608 #endif
 609         }
 610
 611 static void popsig(void)
 612         {
 613         int i;
 614
 615         for (i=1; i<NX509_SIG; i++)
 616                 {
 617 #ifdef SIGUSR1
 618                 if (i == SIGUSR1)
 619                         continue;
 620 #endif
 621 #ifdef SIGUSR2
 622                 if (i == SIGUSR2)
 623                         continue;
 624 #endif
 625 #ifdef SIGACTION
 626                 sigaction(i,&savsig[i],NULL);
 627 #else
 628                 signal(i,savsig[i]);
 629 #endif
 630                 }
 631         }
 632
 633 static void recsig(int i)
 634         {
 635         intr_signal=i;
 636         }
 637 #endif
 638
 639 /* Internal functions specific for Windows */
 640 #if defined(OPENSSL_SYS_MSDOS) && !defined(OPENSSL_SYS_WIN16) && !defined(OPENSSL_SYS_WINCE)
 641 static int noecho_fgets(char *buf, int size, FILE *tty)
 642         {
 643         int i;
 644         char *p;
 645
 646         p=buf;
 647         for (;;)
 648                 {
 649                 if (size == 0)
 650                         {
 651                         *p='\0';
 652                         break;
 653                         }
 654                 size--;
 655 #ifdef WIN16TTY
 656                 i=_inchar();
 657 #else
 658                 i=getch();
 659 #endif
 660                 if (i == '\r') i='\n';
 661                 *(p++)=i;
 662                 if (i == '\n')
 663                         {
 664                         *p='\0';
 665                         break;
 666                         }
 667                 }
 668 #ifdef WIN_CONSOLE_BUG
 669 /* Win95 has several evil console bugs: one of these is that the
 670  * last character read using getch() is passed to the next read: this is
 671  * usually a CR so this can be trouble. No STDIO fix seems to work but
 672  * flushing the console appears to do the trick.
 673  */
 674                 {
 675                         HANDLE inh;
 676                         inh = GetStdHandle(STD_INPUT_HANDLE);
 677                         FlushConsoleInputBuffer(inh);
 678                 }
 679 #endif
 680         return(strlen(buf));
 681         }
 682 #endif