crypto/libressl/crypto/ui/ui_openssl_win.c

   1 /* $OpenBSD: ui_openssl.c,v 1.22 2014/07/11 08:44:49 jsing Exp $ */
   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 #include <sys/ioctl.h>
 118
 119 #include <openssl/opensslconf.h>
 120
 121 #include <errno.h>
 122 #include <signal.h>
 123 #include <stdio.h>
 124 #include <string.h>
 125 #include <unistd.h>
 126
 127 #include "ui_locl.h"
 128
 129 #ifndef NX509_SIG
 130 #define NX509_SIG 32
 131 #endif
 132
 133 /* Define globals.  They are protected by a lock */
 134 static void (*savsig[NX509_SIG])(int );
 135
 136 DWORD console_mode;
 137 static FILE *tty_in, *tty_out;
 138 static int is_a_tty;
 139
 140 /* Declare static functions */
 141 static int read_till_nl(FILE *);
 142 static void recsig(int);
 143 static void pushsig(void);
 144 static void popsig(void);
 145 static int read_string_inner(UI *ui, UI_STRING *uis, int echo, int strip_nl);
 146
 147 static int read_string(UI *ui, UI_STRING *uis);
 148 static int write_string(UI *ui, UI_STRING *uis);
 149
 150 static int open_console(UI *ui);
 151 static int echo_console(UI *ui);
 152 static int noecho_console(UI *ui);
 153 static int close_console(UI *ui);
 154
 155 static UI_METHOD ui_openssl = {
 156         .name = "OpenSSL default user interface",
 157         .ui_open_session = open_console,
 158         .ui_write_string = write_string,
 159         .ui_read_string = read_string,
 160         .ui_close_session = close_console,
 161 };
 162
 163 /* The method with all the built-in thingies */
 164 UI_METHOD *
 165 UI_OpenSSL(void)
 166 {
 167         return &ui_openssl;
 168 }
 169
 170 /* The following function makes sure that info and error strings are printed
 171    before any prompt. */
 172 static int
 173 write_string(UI *ui, UI_STRING *uis)
 174 {
 175         switch (UI_get_string_type(uis)) {
 176         case UIT_ERROR:
 177         case UIT_INFO:
 178                 fputs(UI_get0_output_string(uis), tty_out);
 179                 fflush(tty_out);
 180                 break;
 181         default:
 182                 break;
 183         }
 184         return 1;
 185 }
 186
 187 static int
 188 read_string(UI *ui, UI_STRING *uis)
 189 {
 190         int ok = 0;
 191
 192         switch (UI_get_string_type(uis)) {
 193         case UIT_BOOLEAN:
 194                 fputs(UI_get0_output_string(uis), tty_out);
 195                 fputs(UI_get0_action_string(uis), tty_out);
 196                 fflush(tty_out);
 197                 return read_string_inner(ui, uis,
 198                     UI_get_input_flags(uis) & UI_INPUT_FLAG_ECHO, 0);
 199         case UIT_PROMPT:
 200                 fputs(UI_get0_output_string(uis), tty_out);
 201                 fflush(tty_out);
 202                 return read_string_inner(ui, uis,
 203                     UI_get_input_flags(uis) & UI_INPUT_FLAG_ECHO, 1);
 204         case UIT_VERIFY:
 205                 fprintf(tty_out, "Verifying - %s",
 206                     UI_get0_output_string(uis));
 207                 fflush(tty_out);
 208                 if ((ok = read_string_inner(ui, uis, UI_get_input_flags(uis) &
 209                     UI_INPUT_FLAG_ECHO, 1)) <= 0)
 210                         return ok;
 211                 if (strcmp(UI_get0_result_string(uis),
 212                     UI_get0_test_string(uis)) != 0) {
 213                         fprintf(tty_out, "Verify failure\n");
 214                         fflush(tty_out);
 215                         return 0;
 216                 }
 217                 break;
 218         default:
 219                 break;
 220         }
 221         return 1;
 222 }
 223
 224
 225 /* Internal functions to read a string without echoing */
 226 static int
 227 read_till_nl(FILE *in)
 228 {
 229 #define SIZE 4
 230         char buf[SIZE + 1];
 231
 232         do {
 233                 if (!fgets(buf, SIZE, in))
 234                         return 0;
 235         } while (strchr(buf, '\n') == NULL);
 236         return 1;
 237 }
 238
 239 static volatile sig_atomic_t intr_signal;
 240
 241 static int
 242 read_string_inner(UI *ui, UI_STRING *uis, int echo, int strip_nl)
 243 {
 244         static int ps;
 245         int ok;
 246         char result[BUFSIZ];
 247         int maxsize = BUFSIZ - 1;
 248         char *p;
 249
 250         intr_signal = 0;
 251         ok = 0;
 252         ps = 0;
 253
 254         pushsig();
 255
 256         ps = 1;
 257
 258         if (!echo && !noecho_console(ui))
 259                 goto error;
 260         ps = 2;
 261
 262         result[0] = '\0';
 263         p = fgets(result, maxsize, tty_in);
 264         if (!p)
 265                 goto error;
 266         if (feof(tty_in))
 267                 goto error;
 268         if (ferror(tty_in))
 269                 goto error;
 270         if ((p = strchr(result, '\n')) != NULL) {
 271                 if (strip_nl)
 272                         *p = '\0';
 273         } else if (!read_till_nl(tty_in))
 274                 goto error;
 275         if (UI_set_result(ui, uis, result) >= 0)
 276                 ok = 1;
 277
 278 error:
 279         if (intr_signal == SIGINT)
 280                 ok = -1;
 281         if (!echo)
 282                 fprintf(tty_out, "\n");
 283         if (ps >= 2 && !echo && !echo_console(ui))
 284                 ok = 0;
 285
 286         if (ps >= 1)
 287                 popsig();
 288
 289         explicit_bzero(result, BUFSIZ);
 290         return ok;
 291 }
 292
 293
 294 /* Internal functions to open, handle and close a channel to the console.  */
 295 static int
 296 open_console(UI *ui)
 297 {
 298         CRYPTO_w_lock(CRYPTO_LOCK_UI);
 299         is_a_tty = 1;
 300
 301         tty_in = stdin;
 302         tty_out = stderr;
 303
 304         HANDLE handle = GetStdHandle(STD_INPUT_HANDLE);
 305         if (handle != NULL && handle != INVALID_HANDLE_VALUE) {
 306                 if (GetFileType(handle) == FILE_TYPE_CHAR)
 307                         return GetConsoleMode(handle, &console_mode);
 308                 else
 309                         return 1;
 310         }
 311         return 0;
 312 }
 313
 314 static int
 315 noecho_console(UI *ui)
 316 {
 317         HANDLE handle = GetStdHandle(STD_INPUT_HANDLE);
 318         if (handle != NULL && handle != INVALID_HANDLE_VALUE) {
 319                 if (GetFileType(handle) == FILE_TYPE_CHAR)
 320                         return SetConsoleMode(handle, console_mode & ~ENABLE_ECHO_INPUT);
 321                 else
 322                         return 1;
 323         }
 324         return 0;
 325 }
 326
 327 static int
 328 echo_console(UI *ui)
 329 {
 330         HANDLE handle = GetStdHandle(STD_INPUT_HANDLE);
 331         if (handle != NULL && handle != INVALID_HANDLE_VALUE) {
 332                 if (GetFileType(handle) == FILE_TYPE_CHAR)
 333                         return SetConsoleMode(handle, console_mode);
 334                 else
 335                         return 1;
 336         }
 337         return 0;
 338 }
 339
 340 static int
 341 close_console(UI *ui)
 342 {
 343         if (tty_in != stdin)
 344                 fclose(tty_in);
 345         if (tty_out != stderr)
 346                 fclose(tty_out);
 347         CRYPTO_w_unlock(CRYPTO_LOCK_UI);
 348
 349         return 1;
 350 }
 351
 352 /* Internal functions to handle signals and act on them */
 353 static void
 354 pushsig(void)
 355 {
 356         savsig[SIGABRT] = signal(SIGABRT, recsig);
 357         savsig[SIGFPE]  = signal(SIGFPE,  recsig);
 358         savsig[SIGILL]  = signal(SIGILL,  recsig);
 359         savsig[SIGINT]  = signal(SIGINT,  recsig);
 360         savsig[SIGSEGV] = signal(SIGSEGV, recsig);
 361         savsig[SIGTERM] = signal(SIGTERM, recsig);
 362 }
 363
 364 static void
 365 popsig(void)
 366 {
 367         signal(SIGABRT, savsig[SIGABRT]);
 368         signal(SIGFPE,  savsig[SIGFPE]);
 369         signal(SIGILL,  savsig[SIGILL]);
 370         signal(SIGINT,  savsig[SIGINT]);
 371         signal(SIGSEGV, savsig[SIGSEGV]);
 372         signal(SIGTERM, savsig[SIGTERM]);
 373 }
 374
 375 static void
 376 recsig(int i)
 377 {
 378         intr_signal = i;
 379 }