crypto/des/read_pwd.c

   1 /* crypto/des/read_pwd.c */
   2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
   3  * All rights reserved.
   4  *
   5  * This package is an SSL implementation written
   6  * by Eric Young (eay@cryptsoft.com).
   7  * The implementation was written so as to conform with Netscapes SSL.
   8  *
   9  * This library is free for commercial and non-commercial use as long as
  10  * the following conditions are aheared to.  The following conditions
  11  * apply to all code found in this distribution, be it the RC4, RSA,
  12  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  13  * included with this distribution is covered by the same copyright terms
  14  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
  15  *
  16  * Copyright remains Eric Young's, and as such any Copyright notices in
  17  * the code are not to be removed.
  18  * If this package is used in a product, Eric Young should be given attribution
  19  * as the author of the parts of the library used.
  20  * This can be in the form of a textual message at program startup or
  21  * in documentation (online or textual) provided with the package.
  22  *
  23  * Redistribution and use in source and binary forms, with or without
  24  * modification, are permitted provided that the following conditions
  25  * are met:
  26  * 1. Redistributions of source code must retain the copyright
  27  *    notice, this list of conditions and the following disclaimer.
  28  * 2. Redistributions in binary form must reproduce the above copyright
  29  *    notice, this list of conditions and the following disclaimer in the
  30  *    documentation and/or other materials provided with the distribution.
  31  * 3. All advertising materials mentioning features or use of this software
  32  *    must display the following acknowledgement:
  33  *    "This product includes cryptographic software written by
  34  *     Eric Young (eay@cryptsoft.com)"
  35  *    The word 'cryptographic' can be left out if the rouines from the library
  36  *    being used are not cryptographic related :-).
  37  * 4. If you include any Windows specific code (or a derivative thereof) from
  38  *    the apps directory (application code) you must include an acknowledgement:
  39  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
  40  *
  41  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  42  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  43  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  44  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  45  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  46  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  47  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  49  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  50  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  51  * SUCH DAMAGE.
  52  *
  53  * The licence and distribution terms for any publically available version or
  54  * derivative of this code cannot be changed.  i.e. this code cannot simply be
  55  * copied and put under another distribution licence
  56  * [including the GNU Public Licence.]
  57  */
  58
  59 #include <openssl/e_os2.h>
  60 #if !defined(OPENSSL_SYS_MSDOS) && !defined(OPENSSL_SYS_VMS) && !defined(OPENSSL_SYS_WIN32)
  61 #ifdef OPENSSL_UNISTD
  62 # include OPENSSL_UNISTD
  63 #else
  64 # include <unistd.h>
  65 #endif
  66 /* If unistd.h defines _POSIX_VERSION, we conclude that we
  67  * are on a POSIX system and have sigaction and termios. */
  68 #if defined(_POSIX_VERSION)
  69
  70 # define SIGACTION
  71 # if !defined(TERMIOS) && !defined(TERMIO) && !defined(SGTTY)
  72 # define TERMIOS
  73 # endif
  74
  75 #endif
  76 #endif
  77
  78 /* Define this if you have sigaction() */
  79 /* #define SIGACTION */
  80
  81 /* 06-Apr-92 Luke Brennan    Support for VMS */
  82 #include "des_locl.h"
  83 #include "cryptlib.h"
  84 #include <signal.h>
  85 #include <stdio.h>
  86 #include <string.h>
  87 #include <setjmp.h>
  88 #include <errno.h>
  89
  90 #ifdef OPENSSL_SYS_VMS                  /* prototypes for sys$whatever */
  91 #include <starlet.h>
  92 #ifdef __DECC
  93 #pragma message disable DOLLARID
  94 #endif
  95 #endif
  96
  97 #ifdef WIN_CONSOLE_BUG
  98 #include <windows.h>
  99 #ifndef OPENSSL_SYS_WINCE
 100 #include <wincon.h>
 101 #endif
 102 #endif
 103
 104
 105 /* There are 5 types of terminal interface supported,
 106  * TERMIO, TERMIOS, VMS, MSDOS and SGTTY
 107  */
 108
 109 #if defined(__sgi) && !defined(TERMIOS)
 110 #define TERMIOS
 111 #undef  TERMIO
 112 #undef  SGTTY
 113 #endif
 114
 115 #if defined(linux) && !defined(TERMIO)
 116 #undef  TERMIOS
 117 #define TERMIO
 118 #undef  SGTTY
 119 #endif
 120
 121 #ifdef _LIBC
 122 #undef  TERMIOS
 123 #define TERMIO
 124 #undef  SGTTY
 125 #endif
 126
 127 #if !defined(TERMIO) && !defined(TERMIOS) && !defined(OPENSSL_SYS_VMS) && !defined(OPENSSL_SYS_MSDOS)
 128 #undef  TERMIOS
 129 #undef  TERMIO
 130 #define SGTTY
 131 #endif
 132
 133 #if defined(OPENSSL_SYS_VXWORKS)
 134 #undef TERMIOS
 135 #undef TERMIO
 136 #undef SGTTY
 137 #endif
 138
 139 #ifdef TERMIOS
 140 #include <termios.h>
 141 #define TTY_STRUCT              struct termios
 142 #define TTY_FLAGS               c_lflag
 143 #define TTY_get(tty,data)       tcgetattr(tty,data)
 144 #define TTY_set(tty,data)       tcsetattr(tty,TCSANOW,data)
 145 #endif
 146
 147 #ifdef TERMIO
 148 #include <termio.h>
 149 #define TTY_STRUCT              struct termio
 150 #define TTY_FLAGS               c_lflag
 151 #define TTY_get(tty,data)       ioctl(tty,TCGETA,data)
 152 #define TTY_set(tty,data)       ioctl(tty,TCSETA,data)
 153 #endif
 154
 155 #ifdef SGTTY
 156 #include <sgtty.h>
 157 #define TTY_STRUCT              struct sgttyb
 158 #define TTY_FLAGS               sg_flags
 159 #define TTY_get(tty,data)       ioctl(tty,TIOCGETP,data)
 160 #define TTY_set(tty,data)       ioctl(tty,TIOCSETP,data)
 161 #endif
 162
 163 #if !defined(_LIBC) && !defined(OPENSSL_SYS_MSDOS) && !defined(OPENSSL_SYS_VMS)
 164 #include <sys/ioctl.h>
 165 #endif
 166
 167 #if defined(OPENSSL_SYS_MSDOS) && !defined(__CYGWIN32__) && !defined(OPENSSL_SYS_WINCE)
 168 #include <conio.h>
 169 #define fgets(a,b,c) noecho_fgets(a,b,c)
 170 #endif
 171
 172 #ifdef OPENSSL_SYS_VMS
 173 #include <ssdef.h>
 174 #include <iodef.h>
 175 #include <ttdef.h>
 176 #include <descrip.h>
 177 struct IOSB {
 178         short iosb$w_value;
 179         short iosb$w_count;
 180         long  iosb$l_info;
 181         };
 182 #endif
 183
 184
 185 #ifndef NX509_SIG
 186 #define NX509_SIG 32
 187 #endif
 188
 189 static void read_till_nl(FILE *);
 190 static void recsig(int);
 191 static void pushsig(void);
 192 static void popsig(void);
 193 #if defined(OPENSSL_SYS_MSDOS)
 194 static int noecho_fgets(char *buf, int size, FILE *tty);
 195 #endif
 196 #ifdef SIGACTION
 197  static struct sigaction savsig[NX509_SIG];
 198 #else
 199   static void (*savsig[NX509_SIG])(int );
 200 #endif
 201 static jmp_buf save;
 202
 203 int des_read_pw_string(char *buf, int length, const char *prompt,
 204              int verify)
 205         {
 206         char buff[BUFSIZ];
 207         int ret;
 208
 209         ret=des_read_pw(buf,buff,(length>BUFSIZ)?BUFSIZ:length,prompt,verify);
 210         OPENSSL_cleanse(buff,BUFSIZ);
 211         return(ret);
 212         }
 213
 214 #ifdef OPENSSL_SYS_WINCE
 215
 216 int des_read_pw(char *buf, char *buff, int size, const char *prompt, int verify)
 217         {
 218         memset(buf,0,size);
 219         memset(buff,0,size);
 220         return(0);
 221         }
 222
 223 #else /* !OPENSSL_SYS_WINCE */
 224
 225 static void read_till_nl(FILE *in)
 226         {
 227 #define SIZE 4
 228         char buf[SIZE+1];
 229
 230         do      {
 231                 fgets(buf,SIZE,in);
 232                 } while (strchr(buf,'\n') == NULL);
 233         }
 234
 235
 236 /* return 0 if ok, 1 (or -1) otherwise */
 237 int des_read_pw(char *buf, char *buff, int size, const char *prompt,
 238              int verify)
 239         {
 240 #ifdef OPENSSL_SYS_VMS
 241         struct IOSB iosb;
 242         $DESCRIPTOR(terminal,"TT");
 243         long tty_orig[3], tty_new[3];
 244         long status;
 245         unsigned short channel = 0;
 246 #else
 247 #if !defined(OPENSSL_SYS_MSDOS) || defined(__DJGPP__)
 248         TTY_STRUCT tty_orig,tty_new;
 249 #endif
 250 #endif
 251         int number;
 252         int ok;
 253         /* statics are simply to avoid warnings about longjmp clobbering
 254            things */
 255         static int ps;
 256         int is_a_tty;
 257         static FILE *tty;
 258         char *p;
 259
 260         if (setjmp(save))
 261                 {
 262                 ok=0;
 263                 goto error;
 264                 }
 265
 266         number=5;
 267         ok=0;
 268         ps=0;
 269         is_a_tty=1;
 270         tty=NULL;
 271
 272 #ifdef OPENSSL_SYS_MSDOS
 273         if ((tty=fopen("con","r")) == NULL)
 274                 tty=stdin;
 275 #elif defined(OPENSSL_SYS_VXWORKS)
 276         tty=stdin;
 277 #else
 278         if ((tty=fopen("/dev/tty","r")) == NULL)
 279                 tty=stdin;
 280 #endif
 281
 282 #if defined(TTY_get) && !defined(OPENSSL_SYS_VMS)
 283         if (TTY_get(fileno(tty),&tty_orig) == -1)
 284                 {
 285 #ifdef ENOTTY
 286                 if (errno == ENOTTY)
 287                         is_a_tty=0;
 288                 else
 289 #endif
 290 #ifdef EINVAL
 291                 /* Ariel Glenn ariel@columbia.edu reports that solaris
 292                  * can return EINVAL instead.  This should be ok */
 293                 if (errno == EINVAL)
 294                         is_a_tty=0;
 295                 else
 296 #endif
 297                         return(-1);
 298                 }
 299         memcpy(&(tty_new),&(tty_orig),sizeof(tty_orig));
 300 #endif
 301 #ifdef OPENSSL_SYS_VMS
 302         status = sys$assign(&terminal,&channel,0,0);
 303         if (status != SS$_NORMAL)
 304                 return(-1);
 305         status=sys$qiow(0,channel,IO$_SENSEMODE,&iosb,0,0,tty_orig,12,0,0,0,0);
 306         if ((status != SS$_NORMAL) || (iosb.iosb$w_value != SS$_NORMAL))
 307                 return(-1);
 308 #endif
 309
 310         pushsig();
 311         ps=1;
 312
 313 #ifdef TTY_FLAGS
 314         tty_new.TTY_FLAGS &= ~ECHO;
 315 #endif
 316
 317 #if defined(TTY_set) && !defined(OPENSSL_SYS_VMS)
 318         if (is_a_tty && (TTY_set(fileno(tty),&tty_new) == -1))
 319                 return(-1);
 320 #endif
 321 #ifdef OPENSSL_SYS_VMS
 322         tty_new[0] = tty_orig[0];
 323         tty_new[1] = tty_orig[1] | TT$M_NOECHO;
 324         tty_new[2] = tty_orig[2];
 325         status = sys$qiow(0,channel,IO$_SETMODE,&iosb,0,0,tty_new,12,0,0,0,0);
 326         if ((status != SS$_NORMAL) || (iosb.iosb$w_value != SS$_NORMAL))
 327                 return(-1);
 328 #endif
 329         ps=2;
 330
 331         while ((!ok) && (number--))
 332                 {
 333                 fputs(prompt,stderr);
 334                 fflush(stderr);
 335
 336                 buf[0]='\0';
 337                 fgets(buf,size,tty);
 338                 if (feof(tty)) goto error;
 339                 if (ferror(tty)) goto error;
 340                 if ((p=(char *)strchr(buf,'\n')) != NULL)
 341                         *p='\0';
 342                 else    read_till_nl(tty);
 343                 if (verify)
 344                         {
 345                         fprintf(stderr,"\nVerifying password - %s",prompt);
 346                         fflush(stderr);
 347                         buff[0]='\0';
 348                         fgets(buff,size,tty);
 349                         if (feof(tty)) goto error;
 350                         if ((p=(char *)strchr(buff,'\n')) != NULL)
 351                                 *p='\0';
 352                         else    read_till_nl(tty);
 353
 354                         if (strcmp(buf,buff) != 0)
 355                                 {
 356                                 fprintf(stderr,"\nVerify failure");
 357                                 fflush(stderr);
 358                                 break;
 359                                 /* continue; */
 360                                 }
 361                         }
 362                 ok=1;
 363                 }
 364
 365 error:
 366         fprintf(stderr,"\n");
 367 #if 0
 368         perror("fgets(tty)");
 369 #endif
 370         /* What can we do if there is an error? */
 371 #if defined(TTY_set) && !defined(OPENSSL_SYS_VMS)
 372         if (ps >= 2) TTY_set(fileno(tty),&tty_orig);
 373 #endif
 374 #ifdef OPENSSL_SYS_VMS
 375         if (ps >= 2)
 376                 status = sys$qiow(0,channel,IO$_SETMODE,&iosb,0,0
 377                         ,tty_orig,12,0,0,0,0);
 378 #endif
 379
 380         if (ps >= 1) popsig();
 381         if (stdin != tty) fclose(tty);
 382 #ifdef OPENSSL_SYS_VMS
 383         status = sys$dassgn(channel);
 384 #endif
 385         return(!ok);
 386         }
 387
 388 static void pushsig(void)
 389         {
 390         int i;
 391 #ifdef SIGACTION
 392         struct sigaction sa;
 393
 394         memset(&sa,0,sizeof sa);
 395         sa.sa_handler=recsig;
 396 #endif
 397
 398         for (i=1; i<NX509_SIG; i++)
 399                 {
 400 #ifdef SIGUSR1
 401                 if (i == SIGUSR1)
 402                         continue;
 403 #endif
 404 #ifdef SIGUSR2
 405                 if (i == SIGUSR2)
 406                         continue;
 407 #endif
 408 #ifdef SIGACTION
 409                 sigaction(i,&sa,&savsig[i]);
 410 #else
 411                 savsig[i]=signal(i,recsig);
 412 #endif
 413                 }
 414
 415 #ifdef SIGWINCH
 416         signal(SIGWINCH,SIG_DFL);
 417 #endif
 418         }
 419
 420 static void popsig(void)
 421         {
 422         int i;
 423
 424         for (i=1; i<NX509_SIG; i++)
 425                 {
 426 #ifdef SIGUSR1
 427                 if (i == SIGUSR1)
 428                         continue;
 429 #endif
 430 #ifdef SIGUSR2
 431                 if (i == SIGUSR2)
 432                         continue;
 433 #endif
 434 #ifdef SIGACTION
 435                 sigaction(i,&savsig[i],NULL);
 436 #else
 437                 signal(i,savsig[i]);
 438 #endif
 439                 }
 440         }
 441
 442 static void recsig(int i)
 443         {
 444         longjmp(save,1);
 445         }
 446
 447 #ifdef OPENSSL_SYS_MSDOS
 448 static int noecho_fgets(char *buf, int size, FILE *tty)
 449         {
 450         int i;
 451         char *p;
 452
 453         p=buf;
 454         for (;;)
 455                 {
 456                 if (size == 0)
 457                         {
 458                         *p='\0';
 459                         break;
 460                         }
 461                 size--;
 462                 i=getch();
 463                 if (i == '\r') i='\n';
 464                 *(p++)=i;
 465                 if (i == '\n')
 466                         {
 467                         *p='\0';
 468                         break;
 469                         }
 470                 }
 471 #ifdef WIN_CONSOLE_BUG
 472 /* Win95 has several evil console bugs: one of these is that the
 473  * last character read using getch() is passed to the next read: this is
 474  * usually a CR so this can be trouble. No STDIO fix seems to work but
 475  * flushing the console appears to do the trick.
 476  */
 477                 {
 478                         HANDLE inh;
 479                         inh = GetStdHandle(STD_INPUT_HANDLE);
 480                         FlushConsoleInputBuffer(inh);
 481                 }
 482 #endif
 483         return(strlen(buf));
 484         }
 485 #endif
 486 #endif /* !OPENSSL_SYS_WINCE */