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ui_openssl.c
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1 /* crypto/ui/ui_openssl.c -*- mode:C; c-file-style: "eay" -*- */
2 /* Written by Richard Levitte ([email protected]) 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
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  * ([email protected]). This product includes software written by Tim
55  * Hudson ([email protected]).
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 ([email protected])
61  * All rights reserved.
62  *
63  * This package is an SSL implementation written
64  * by Eric Young ([email protected]).
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 ([email protected]).
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 ([email protected])"
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 ([email protected])"
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 #if !defined(_POSIX_C_SOURCE) && defined(OPENSSL_SYS_VMS)
126 #define _POSIX_C_SOURCE 2
127 #endif
128 #include <signal.h>
129 #include <stdio.h>
130 #include <string.h>
131 #include <errno.h>
132 
133 #if !defined(OPENSSL_SYS_MSDOS) && !defined(OPENSSL_SYS_VMS)
134 # ifdef OPENSSL_UNISTD
135 # include OPENSSL_UNISTD
136 # else
137 # include <unistd.h>
138 # endif
139 /* If unistd.h defines _POSIX_VERSION, we conclude that we
140  * are on a POSIX system and have sigaction and termios. */
141 # if defined(_POSIX_VERSION)
142 
143 # define SIGACTION
144 # if !defined(TERMIOS) && !defined(TERMIO) && !defined(SGTTY)
145 # define TERMIOS
146 # endif
147 
148 # endif
149 #endif
150 
151 #ifdef WIN16TTY
152 # undef OPENSSL_SYS_WIN16
153 # undef WIN16
154 # undef _WINDOWS
155 # include <graph.h>
156 #endif
157 
158 /* 06-Apr-92 Luke Brennan Support for VMS */
159 #include "ui_locl.h"
160 #include "cryptlib.h"
161 
162 #ifdef OPENSSL_SYS_VMS /* prototypes for sys$whatever */
163 # include <starlet.h>
164 # ifdef __DECC
165 # pragma message disable DOLLARID
166 # endif
167 #endif
168 
169 #ifdef WIN_CONSOLE_BUG
170 # include <windows.h>
171 #ifndef OPENSSL_SYS_WINCE
172 # include <wincon.h>
173 #endif
174 #endif
175 
176 
177 /* There are 5 types of terminal interface supported,
178  * TERMIO, TERMIOS, VMS, MSDOS and SGTTY
179  */
180 
181 #if defined(__sgi) && !defined(TERMIOS)
182 # define TERMIOS
183 # undef TERMIO
184 # undef SGTTY
185 #endif
186 
187 #if defined(linux) && !defined(TERMIO)
188 # undef TERMIOS
189 # define TERMIO
190 # undef SGTTY
191 #endif
192 
193 #ifdef _LIBC
194 # undef TERMIOS
195 # define TERMIO
196 # undef SGTTY
197 #endif
198 
199 #if !defined(TERMIO) && !defined(TERMIOS) && !defined(OPENSSL_SYS_VMS) && !defined(OPENSSL_SYS_MSDOS) && !defined(OPENSSL_SYS_MACINTOSH_CLASSIC) && !defined(MAC_OS_GUSI_SOURCE)
200 # undef TERMIOS
201 # undef TERMIO
202 # define SGTTY
203 #endif
204 
205 #if defined(OPENSSL_SYS_VXWORKS)
206 #undef TERMIOS
207 #undef TERMIO
208 #undef SGTTY
209 #endif
210 
211 #if defined(OPENSSL_SYS_NETWARE)
212 #undef TERMIOS
213 #undef TERMIO
214 #undef SGTTY
215 #endif
216 
217 #ifdef TERMIOS
218 # include <termios.h>
219 # define TTY_STRUCT struct termios
220 # define TTY_FLAGS c_lflag
221 # define TTY_get(tty,data) tcgetattr(tty,data)
222 # define TTY_set(tty,data) tcsetattr(tty,TCSANOW,data)
223 #endif
224 
225 #ifdef TERMIO
226 # include <termio.h>
227 # define TTY_STRUCT struct termio
228 # define TTY_FLAGS c_lflag
229 # define TTY_get(tty,data) ioctl(tty,TCGETA,data)
230 # define TTY_set(tty,data) ioctl(tty,TCSETA,data)
231 #endif
232 
233 #ifdef SGTTY
234 # include <sgtty.h>
235 # define TTY_STRUCT struct sgttyb
236 # define TTY_FLAGS sg_flags
237 # define TTY_get(tty,data) ioctl(tty,TIOCGETP,data)
238 # define TTY_set(tty,data) ioctl(tty,TIOCSETP,data)
239 #endif
240 
241 #if !defined(_LIBC) && !defined(OPENSSL_SYS_MSDOS) && !defined(OPENSSL_SYS_VMS) && !defined(OPENSSL_SYS_MACINTOSH_CLASSIC) && !defined(OPENSSL_SYS_SUNOS)
242 # include <sys/ioctl.h>
243 #endif
244 
245 #ifdef OPENSSL_SYS_MSDOS
246 # include <conio.h>
247 #endif
248 
249 #ifdef OPENSSL_SYS_VMS
250 # include <ssdef.h>
251 # include <iodef.h>
252 # include <ttdef.h>
253 # include <descrip.h>
254 struct IOSB {
255  short iosb$w_value;
256  short iosb$w_count;
257  long iosb$l_info;
258  };
259 #endif
260 
261 #ifdef OPENSSL_SYS_SUNOS
262  typedef int sig_atomic_t;
263 #endif
264 
265 #if defined(OPENSSL_SYS_MACINTOSH_CLASSIC) || defined(MAC_OS_GUSI_SOURCE) || defined(OPENSSL_SYS_NETWARE)
266 /*
267  * This one needs work. As a matter of fact the code is unoperational
268  * and this is only a trick to get it compiled.
270  */
271 # define TTY_STRUCT int
272 #endif
273 
274 #ifndef NX509_SIG
275 # define NX509_SIG 32
276 #endif
277 
278 
279 /* Define globals. They are protected by a lock */
280 #ifdef SIGACTION
281 static struct sigaction savsig[NX509_SIG];
282 #else
283 static void (*savsig[NX509_SIG])(int );
284 #endif
285 
286 #ifdef OPENSSL_SYS_VMS
287 static struct IOSB iosb;
288 static $DESCRIPTOR(terminal,"TT");
289 static long tty_orig[3], tty_new[3]; /* XXX Is there any guarantee that this will always suffice for the actual structures? */
290 static long status;
291 static unsigned short channel = 0;
292 #else
293 #if !defined(OPENSSL_SYS_MSDOS) || defined(__DJGPP__)
294 static TTY_STRUCT tty_orig,tty_new;
295 #endif
296 #endif
297 static FILE *tty_in, *tty_out;
298 static int is_a_tty;
299 
300 /* Declare static functions */
301 #if !defined(OPENSSL_SYS_WIN16) && !defined(OPENSSL_SYS_WINCE)
302 static int read_till_nl(FILE *);
303 static void recsig(int);
304 static void pushsig(void);
305 static void popsig(void);
306 #endif
307 #if defined(OPENSSL_SYS_MSDOS) && !defined(OPENSSL_SYS_WIN16)
308 static int noecho_fgets(char *buf, int size, FILE *tty);
309 #endif
310 static int read_string_inner(UI *ui, UI_STRING *uis, int echo, int strip_nl);
311 
312 static int read_string(UI *ui, UI_STRING *uis);
313 static int write_string(UI *ui, UI_STRING *uis);
314 
315 static int open_console(UI *ui);
316 static int echo_console(UI *ui);
317 static int noecho_console(UI *ui);
318 static int close_console(UI *ui);
319 
320 static UI_METHOD ui_openssl =
321  {
322  "OpenSSL default user interface",
323  open_console,
324  write_string,
325  NULL, /* No flusher is needed for command lines */
326  read_string,
327  close_console,
328  NULL
329  };
330 
331 /* The method with all the built-in thingies */
333  {
334  return &ui_openssl;
335  }
336 
337 /* The following function makes sure that info and error strings are printed
338  before any prompt. */
339 static int write_string(UI *ui, UI_STRING *uis)
340  {
341  switch (UI_get_string_type(uis))
342  {
343  case UIT_ERROR:
344  case UIT_INFO:
345  fputs(UI_get0_output_string(uis), tty_out);
346  fflush(tty_out);
347  break;
348  default:
349  break;
350  }
351  return 1;
352  }
353 
354 static int read_string(UI *ui, UI_STRING *uis)
355  {
356  int ok = 0;
357 
358  switch (UI_get_string_type(uis))
359  {
360  case UIT_BOOLEAN:
361  fputs(UI_get0_output_string(uis), tty_out);
362  fputs(UI_get0_action_string(uis), tty_out);
363  fflush(tty_out);
364  return read_string_inner(ui, uis,
366  case UIT_PROMPT:
367  fputs(UI_get0_output_string(uis), tty_out);
368  fflush(tty_out);
369  return read_string_inner(ui, uis,
371  case UIT_VERIFY:
372  fprintf(tty_out,"Verifying - %s",
373  UI_get0_output_string(uis));
374  fflush(tty_out);
375  if ((ok = read_string_inner(ui, uis,
376  UI_get_input_flags(uis) & UI_INPUT_FLAG_ECHO, 1)) <= 0)
377  return ok;
378  if (strcmp(UI_get0_result_string(uis),
379  UI_get0_test_string(uis)) != 0)
380  {
381  fprintf(tty_out,"Verify failure\n");
382  fflush(tty_out);
383  return 0;
384  }
385  break;
386  default:
387  break;
388  }
389  return 1;
390  }
391 
392 
393 #if !defined(OPENSSL_SYS_WIN16) && !defined(OPENSSL_SYS_WINCE)
394 /* Internal functions to read a string without echoing */
395 static int read_till_nl(FILE *in)
396  {
397 #define SIZE 4
398  char buf[SIZE+1];
399 
400  do {
401  if (!fgets(buf,SIZE,in))
402  return 0;
403  } while (strchr(buf,'\n') == NULL);
404  return 1;
405  }
406 
407 static volatile sig_atomic_t intr_signal;
408 #endif
409 
410 static int read_string_inner(UI *ui, UI_STRING *uis, int echo, int strip_nl)
411  {
412  static int ps;
413  int ok;
414  char result[BUFSIZ];
415  int maxsize = BUFSIZ-1;
416 #if !defined(OPENSSL_SYS_WIN16) && !defined(OPENSSL_SYS_WINCE)
417  char *p;
418 
419  intr_signal=0;
420  ok=0;
421  ps=0;
422 
423  pushsig();
424  ps=1;
425 
426  if (!echo && !noecho_console(ui))
427  goto error;
428  ps=2;
429 
430  result[0]='\0';
431 #ifdef OPENSSL_SYS_MSDOS
432  if (!echo)
433  {
434  noecho_fgets(result,maxsize,tty_in);
435  p=result; /* FIXME: noecho_fgets doesn't return errors */
436  }
437  else
438  p=fgets(result,maxsize,tty_in);
439 #else
440  p=fgets(result,maxsize,tty_in);
441 #endif
442  if(!p)
443  goto error;
444  if (feof(tty_in)) goto error;
445  if (ferror(tty_in)) goto error;
446  if ((p=(char *)strchr(result,'\n')) != NULL)
447  {
448  if (strip_nl)
449  *p='\0';
450  }
451  else
452  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) fprintf(tty_out,"\n");
461  if (ps >= 2 && !echo && !echo_console(ui))
462  ok=0;
463 
464  if (ps >= 1)
465  popsig();
466 #else
467  ok=1;
468 #endif
469 
470  OPENSSL_cleanse(result,BUFSIZ);
471  return ok;
472  }
473 
474 
475 /* Internal functions to open, handle and close a channel to the console. */
476 static int open_console(UI *ui)
477  {
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  {
499 #ifdef ENOTTY
500  if (errno == ENOTTY)
501  is_a_tty=0;
502  else
503 #endif
504 #ifdef EINVAL
505  /* Ariel Glenn [email protected] reports that solaris
506  * can return EINVAL instead. This should be ok */
507  if (errno == EINVAL)
508  is_a_tty=0;
509  else
510 #endif
511  return 0;
512  }
513 #endif
514 #ifdef OPENSSL_SYS_VMS
515  status = sys$assign(&terminal,&channel,0,0);
516  if (status != SS$_NORMAL)
517  return 0;
518  status=sys$qiow(0,channel,IO$_SENSEMODE,&iosb,0,0,tty_orig,12,0,0,0,0);
519  if ((status != SS$_NORMAL) || (iosb.iosb$w_value != SS$_NORMAL))
520  return 0;
521 #endif
522  return 1;
523  }
524 
525 static int noecho_console(UI *ui)
526  {
527 #ifdef TTY_FLAGS
528  memcpy(&(tty_new),&(tty_orig),sizeof(tty_orig));
529  tty_new.TTY_FLAGS &= ~ECHO;
530 #endif
531 
532 #if defined(TTY_set) && !defined(OPENSSL_SYS_VMS)
533  if (is_a_tty && (TTY_set(fileno(tty_in),&tty_new) == -1))
534  return 0;
535 #endif
536 #ifdef OPENSSL_SYS_VMS
537  tty_new[0] = tty_orig[0];
538  tty_new[1] = tty_orig[1] | TT$M_NOECHO;
539  tty_new[2] = tty_orig[2];
540  status = sys$qiow(0,channel,IO$_SETMODE,&iosb,0,0,tty_new,12,0,0,0,0);
541  if ((status != SS$_NORMAL) || (iosb.iosb$w_value != SS$_NORMAL))
542  return 0;
543 #endif
544  return 1;
545  }
546 
547 static int echo_console(UI *ui)
548  {
549 #if defined(TTY_set) && !defined(OPENSSL_SYS_VMS)
550  memcpy(&(tty_new),&(tty_orig),sizeof(tty_orig));
551  tty_new.TTY_FLAGS |= ECHO;
552 #endif
553 
554 #if defined(TTY_set) && !defined(OPENSSL_SYS_VMS)
555  if (is_a_tty && (TTY_set(fileno(tty_in),&tty_new) == -1))
556  return 0;
557 #endif
558 #ifdef OPENSSL_SYS_VMS
559  tty_new[0] = tty_orig[0];
560  tty_new[1] = tty_orig[1] & ~TT$M_NOECHO;
561  tty_new[2] = tty_orig[2];
562  status = sys$qiow(0,channel,IO$_SETMODE,&iosb,0,0,tty_new,12,0,0,0,0);
563  if ((status != SS$_NORMAL) || (iosb.iosb$w_value != SS$_NORMAL))
564  return 0;
565 #endif
566  return 1;
567  }
568 
569 static int close_console(UI *ui)
570  {
571  if (tty_in != stdin) fclose(tty_in);
572  if (tty_out != stderr) fclose(tty_out);
573 #ifdef OPENSSL_SYS_VMS
574  status = sys$dassgn(channel);
575 #endif
577 
578  return 1;
579  }
580 
581 
582 #if !defined(OPENSSL_SYS_WIN16) && !defined(OPENSSL_SYS_WINCE)
583 /* Internal functions to handle signals and act on them */
584 static void pushsig(void)
585  {
586 #ifndef OPENSSL_SYS_WIN32
587  int i;
588 #endif
589 #ifdef SIGACTION
590  struct sigaction sa;
591 
592  memset(&sa,0,sizeof sa);
593  sa.sa_handler=recsig;
594 #endif
595 
596 #ifdef OPENSSL_SYS_WIN32
597  savsig[SIGABRT]=signal(SIGABRT,recsig);
598  savsig[SIGFPE]=signal(SIGFPE,recsig);
599  savsig[SIGILL]=signal(SIGILL,recsig);
600  savsig[SIGINT]=signal(SIGINT,recsig);
601  savsig[SIGSEGV]=signal(SIGSEGV,recsig);
602  savsig[SIGTERM]=signal(SIGTERM,recsig);
603 #else
604  for (i=1; i<NX509_SIG; i++)
605  {
606 #ifdef SIGUSR1
607  if (i == SIGUSR1)
608  continue;
609 #endif
610 #ifdef SIGUSR2
611  if (i == SIGUSR2)
612  continue;
613 #endif
614 #ifdef SIGKILL
615  if (i == SIGKILL) /* We can't make any action on that. */
616  continue;
617 #endif
618 #ifdef SIGACTION
619  sigaction(i,&sa,&savsig[i]);
620 #else
621  savsig[i]=signal(i,recsig);
622 #endif
623  }
624 #endif
625 
626 #ifdef SIGWINCH
627  signal(SIGWINCH,SIG_DFL);
628 #endif
629  }
630 
631 static void popsig(void)
632  {
633 #ifdef OPENSSL_SYS_WIN32
634  signal(SIGABRT,savsig[SIGABRT]);
635  signal(SIGFPE,savsig[SIGFPE]);
636  signal(SIGILL,savsig[SIGILL]);
637  signal(SIGINT,savsig[SIGINT]);
638  signal(SIGSEGV,savsig[SIGSEGV]);
639  signal(SIGTERM,savsig[SIGTERM]);
640 #else
641  int i;
642  for (i=1; i<NX509_SIG; i++)
643  {
644 #ifdef SIGUSR1
645  if (i == SIGUSR1)
646  continue;
647 #endif
648 #ifdef SIGUSR2
649  if (i == SIGUSR2)
650  continue;
651 #endif
652 #ifdef SIGACTION
653  sigaction(i,&savsig[i],NULL);
654 #else
655  signal(i,savsig[i]);
656 #endif
657  }
658 #endif
659  }
660 
661 static void recsig(int i)
662  {
663  intr_signal=i;
664  }
665 #endif
666 
667 /* Internal functions specific for Windows */
668 #if defined(OPENSSL_SYS_MSDOS) && !defined(OPENSSL_SYS_WIN16) && !defined(OPENSSL_SYS_WINCE)
669 static int noecho_fgets(char *buf, int size, FILE *tty)
670  {
671  int i;
672  char *p;
673 
674  p=buf;
675  for (;;)
676  {
677  if (size == 0)
678  {
679  *p='\0';
680  break;
681  }
682  size--;
683 #ifdef WIN16TTY
684  i=_inchar();
685 #elif defined(_WIN32)
686  i=_getch();
687 #else
688  i=getch();
689 #endif
690  if (i == '\r') i='\n';
691  *(p++)=i;
692  if (i == '\n')
693  {
694  *p='\0';
695  break;
696  }
697  }
698 #ifdef WIN_CONSOLE_BUG
699 /* Win95 has several evil console bugs: one of these is that the
700  * last character read using getch() is passed to the next read: this is
701  * usually a CR so this can be trouble. No STDIO fix seems to work but
702  * flushing the console appears to do the trick.
703  */
704  {
705  HANDLE inh;
706  inh = GetStdHandle(STD_INPUT_HANDLE);
707  FlushConsoleInputBuffer(inh);
708  }
709 #endif
710  return(strlen(buf));
711  }
712 #endif