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 /* #define SIGACTION */ /* Define this if you have sigaction() */
  60 #ifdef WIN16TTY
  61 #undef WIN16
  62 #undef _WINDOWS
  63 #include <graph.h>
  64 #endif
  65
  66 #if defined(WIN32) && !defined(WINNT)
  67 #define WIN_CONSOLE_BUG
  68 #endif
  69
  70
  71 /* 06-Apr-92 Luke Brennan    Support for VMS */
  72 #include "des_locl.h"
  73 #include <signal.h>
  74 #include <string.h>
  75 #include <setjmp.h>
  76 #include <errno.h>
  77
  78 #ifdef WIN_CONSOLE_BUG
  79 #include <windows.h>
  80 #include <wincon.h>
  81 #endif
  82
  83
  84 /* There are 5 types of terminal interface supported,
  85  * TERMIO, TERMIOS, VMS, MSDOS and SGTTY
  86  */
  87
  88 #if defined(__sgi) && !defined(TERMIOS)
  89 #define TERMIOS
  90 #undef  TERMIO
  91 #undef  SGTTY
  92 #endif
  93
  94 #if defined(linux) && !defined(TERMIO)
  95 #undef  TERMIOS
  96 #define TERMIO
  97 #undef  SGTTY
  98 #endif
  99
 100 #ifdef _LIBC
 101 #undef  TERMIOS
 102 #define TERMIO
 103 #undef  SGTTY
 104 #endif
 105
 106 #if !defined(TERMIO) && !defined(TERMIOS) && !defined(VMS) && !defined(MSDOS)
 107 #undef  TERMIOS
 108 #undef  TERMIO
 109 #define SGTTY
 110 #endif
 111
 112 #ifdef TERMIOS
 113 #include <termios.h>
 114 #define TTY_STRUCT              struct termios
 115 #define TTY_FLAGS               c_lflag
 116 #define TTY_get(tty,data)       tcgetattr(tty,data)
 117 #define TTY_set(tty,data)       tcsetattr(tty,TCSANOW,data)
 118 #endif
 119
 120 #ifdef TERMIO
 121 #include <termio.h>
 122 #define TTY_STRUCT              struct termio
 123 #define TTY_FLAGS               c_lflag
 124 #define TTY_get(tty,data)       ioctl(tty,TCGETA,data)
 125 #define TTY_set(tty,data)       ioctl(tty,TCSETA,data)
 126 #endif
 127
 128 #ifdef SGTTY
 129 #include <sgtty.h>
 130 #define TTY_STRUCT              struct sgttyb
 131 #define TTY_FLAGS               sg_flags
 132 #define TTY_get(tty,data)       ioctl(tty,TIOCGETP,data)
 133 #define TTY_set(tty,data)       ioctl(tty,TIOCSETP,data)
 134 #endif
 135
 136 #if !defined(_LIBC) && !defined(MSDOS) && !defined(VMS)
 137 #include <sys/ioctl.h>
 138 #endif
 139
 140 #ifdef MSDOS
 141 #include <conio.h>
 142 #define fgets(a,b,c) noecho_fgets(a,b,c)
 143 #endif
 144
 145 #ifdef VMS
 146 #include <ssdef.h>
 147 #include <iodef.h>
 148 #include <ttdef.h>
 149 #include <descrip.h>
 150 struct IOSB {
 151         short iosb$w_value;
 152         short iosb$w_count;
 153         long  iosb$l_info;
 154         };
 155 #endif
 156
 157 #ifndef NX509_SIG
 158 #define NX509_SIG 32
 159 #endif
 160
 161 #ifndef NOPROTO
 162 static void read_till_nl(FILE *);
 163 static void recsig(int);
 164 static void pushsig(void);
 165 static void popsig(void);
 166 #if defined(MSDOS) && !defined(WIN16)
 167 static int noecho_fgets(char *buf, int size, FILE *tty);
 168 #endif
 169 #else
 170 static void read_till_nl();
 171 static void recsig();
 172 static void pushsig();
 173 static void popsig();
 174 #if defined(MSDOS) && !defined(WIN16)
 175 static int noecho_fgets();
 176 #endif
 177 #endif
 178
 179 #ifdef SIGACTION
 180  static struct sigaction savsig[NX509_SIG];
 181 #else
 182 # ifndef NOPROTO
 183   static void (*savsig[NX509_SIG])(int );
 184 # else
 185   static void (*savsig[NX509_SIG])();
 186 # endif
 187 #endif
 188 static jmp_buf save;
 189
 190 int des_read_pw_string(buf, length, prompt, verify)
 191 char *buf;
 192 int length;
 193 const char *prompt;
 194 int verify;
 195         {
 196         char buff[BUFSIZ];
 197         int ret;
 198
 199         ret=des_read_pw(buf,buff,(length>BUFSIZ)?BUFSIZ:length,prompt,verify);
 200         memset(buff,0,BUFSIZ);
 201         return(ret);
 202         }
 203
 204 #ifndef WIN16
 205
 206 static void read_till_nl(in)
 207 FILE *in;
 208         {
 209 #define SIZE 4
 210         char buf[SIZE+1];
 211
 212         do      {
 213                 fgets(buf,SIZE,in);
 214                 } while (strchr(buf,'\n') == NULL);
 215         }
 216
 217
 218 /* return 0 if ok, 1 (or -1) otherwise */
 219 int des_read_pw(buf, buff, size, prompt, verify)
 220 char *buf;
 221 char *buff;
 222 int size;
 223 const char *prompt;
 224 int verify;
 225         {
 226 #ifdef VMS
 227         struct IOSB iosb;
 228         $DESCRIPTOR(terminal,"TT");
 229         long tty_orig[3], tty_new[3];
 230         long status;
 231         unsigned short channel = 0;
 232 #else
 233 #ifndef MSDOS
 234         TTY_STRUCT tty_orig,tty_new;
 235 #endif
 236 #endif
 237         int number;
 238         int ok;
 239         /* statics are simply to avoid warnings about longjmp clobbering
 240            things */
 241         static int ps;
 242         int is_a_tty;
 243         static FILE *tty;
 244         char *p;
 245
 246         if (setjmp(save))
 247                 {
 248                 ok=0;
 249                 goto error;
 250                 }
 251
 252         number=5;
 253         ok=0;
 254         ps=0;
 255         is_a_tty=1;
 256         tty=NULL;
 257
 258 #ifndef MSDOS
 259         if ((tty=fopen("/dev/tty","r")) == NULL)
 260                 tty=stdin;
 261 #else /* MSDOS */
 262         if ((tty=fopen("con","r")) == NULL)
 263                 tty=stdin;
 264 #endif /* MSDOS */
 265
 266 #if defined(TTY_get) && !defined(VMS)
 267         if (TTY_get(fileno(tty),&tty_orig) == -1)
 268                 {
 269 #ifdef ENOTTY
 270                 if (errno == ENOTTY)
 271                         is_a_tty=0;
 272                 else
 273 #endif
 274 #ifdef EINVAL
 275                 /* Ariel Glenn ariel@columbia.edu reports that solaris
 276                  * can return EINVAL instead.  This should be ok */
 277                 if (errno == EINVAL)
 278                         is_a_tty=0;
 279                 else
 280 #endif
 281                         return(-1);
 282                 }
 283         memcpy(&(tty_new),&(tty_orig),sizeof(tty_orig));
 284 #endif
 285 #ifdef VMS
 286         status = SYS$ASSIGN(&terminal,&channel,0,0);
 287         if (status != SS$_NORMAL)
 288                 return(-1);
 289         status=SYS$QIOW(0,channel,IO$_SENSEMODE,&iosb,0,0,tty_orig,12,0,0,0,0);
 290         if ((status != SS$_NORMAL) || (iosb.iosb$w_value != SS$_NORMAL))
 291                 return(-1);
 292 #endif
 293
 294         pushsig();
 295         ps=1;
 296
 297 #ifdef TTY_FLAGS
 298         tty_new.TTY_FLAGS &= ~ECHO;
 299 #endif
 300
 301 #if defined(TTY_set) && !defined(VMS)
 302         if (is_a_tty && (TTY_set(fileno(tty),&tty_new) == -1))
 303                 return(-1);
 304 #endif
 305 #ifdef VMS
 306         tty_new[0] = tty_orig[0];
 307         tty_new[1] = tty_orig[1] | TT$M_NOECHO;
 308         tty_new[2] = tty_orig[2];
 309         status = SYS$QIOW(0,channel,IO$_SETMODE,&iosb,0,0,tty_new,12,0,0,0,0);
 310         if ((status != SS$_NORMAL) || (iosb.iosb$w_value != SS$_NORMAL))
 311                 return(-1);
 312 #endif
 313         ps=2;
 314
 315         while ((!ok) && (number--))
 316                 {
 317                 fputs(prompt,stderr);
 318                 fflush(stderr);
 319
 320                 buf[0]='\0';
 321                 fgets(buf,size,tty);
 322                 if (feof(tty)) goto error;
 323                 if (ferror(tty)) goto error;
 324                 if ((p=(char *)strchr(buf,'\n')) != NULL)
 325                         *p='\0';
 326                 else    read_till_nl(tty);
 327                 if (verify)
 328                         {
 329                         fprintf(stderr,"\nVerifying password - %s",prompt);
 330                         fflush(stderr);
 331                         buff[0]='\0';
 332                         fgets(buff,size,tty);
 333                         if (feof(tty)) goto error;
 334                         if ((p=(char *)strchr(buff,'\n')) != NULL)
 335                                 *p='\0';
 336                         else    read_till_nl(tty);
 337
 338                         if (strcmp(buf,buff) != 0)
 339                                 {
 340                                 fprintf(stderr,"\nVerify failure");
 341                                 fflush(stderr);
 342                                 break;
 343                                 /* continue; */
 344                                 }
 345                         }
 346                 ok=1;
 347                 }
 348
 349 error:
 350         fprintf(stderr,"\n");
 351 #ifdef DEBUG
 352         perror("fgets(tty)");
 353 #endif
 354         /* What can we do if there is an error? */
 355 #if defined(TTY_set) && !defined(VMS)
 356         if (ps >= 2) TTY_set(fileno(tty),&tty_orig);
 357 #endif
 358 #ifdef VMS
 359         if (ps >= 2)
 360                 status = SYS$QIOW(0,channel,IO$_SETMODE,&iosb,0,0
 361                         ,tty_orig,12,0,0,0,0);
 362 #endif
 363
 364         if (ps >= 1) popsig();
 365         if (stdin != tty) fclose(tty);
 366 #ifdef VMS
 367         status = SYS$DASSGN(channel);
 368 #endif
 369         return(!ok);
 370         }
 371
 372 #else /* WIN16 */
 373
 374 int des_read_pw(buf, buff, size, prompt, verify)
 375 char *buf;
 376 char *buff;
 377 int size;
 378 char *prompt;
 379 int verify;
 380         {
 381         memset(buf,0,size);
 382         memset(buff,0,size);
 383         return(0);
 384         }
 385
 386 #endif
 387
 388 static void pushsig()
 389         {
 390         int i;
 391
 392         for (i=1; i<NX509_SIG; i++)
 393                 {
 394 #ifdef SIGUSR1
 395                 if (i == SIGUSR1)
 396                         continue;
 397 #endif
 398 #ifdef SIGUSR2
 399                 if (i == SIGUSR2)
 400                         continue;
 401 #endif
 402 #ifdef SIGACTION
 403                 sigaction(i,NULL,&savsig[i]);
 404 #else
 405                 savsig[i]=signal(i,recsig);
 406 #endif
 407                 }
 408
 409 #ifdef SIGWINCH
 410         signal(SIGWINCH,SIG_DFL);
 411 #endif
 412         }
 413
 414 static void popsig()
 415         {
 416         int i;
 417
 418         for (i=1; i<NX509_SIG; i++)
 419                 {
 420 #ifdef SIGUSR1
 421                 if (i == SIGUSR1)
 422                         continue;
 423 #endif
 424 #ifdef SIGUSR2
 425                 if (i == SIGUSR2)
 426                         continue;
 427 #endif
 428 #ifdef SIGACTION
 429                 sigaction(i,&savsig[i],NULL);
 430 #else
 431                 signal(i,savsig[i]);
 432 #endif
 433                 }
 434         }
 435
 436 static void recsig(i)
 437 int i;
 438         {
 439         longjmp(save,1);
 440 #ifdef LINT
 441         i=i;
 442 #endif
 443         }
 444
 445 #if defined(MSDOS) && !defined(WIN16)
 446 static int noecho_fgets(buf,size,tty)
 447 char *buf;
 448 int size;
 449 FILE *tty;
 450         {
 451         int i;
 452         char *p;
 453
 454         p=buf;
 455         for (;;)
 456                 {
 457                 if (size == 0)
 458                         {
 459                         *p='\0';
 460                         break;
 461                         }
 462                 size--;
 463 #ifdef WIN16TTY
 464                 i=_inchar();
 465 #else
 466                 i=getch();
 467 #endif
 468                 if (i == '\r') i='\n';
 469                 *(p++)=i;
 470                 if (i == '\n')
 471                         {
 472                         *p='\0';
 473                         break;
 474                         }
 475                 }
 476 #ifdef WIN_CONSOLE_BUG
 477 /* Win95 has several evil console bugs: one of these is that the
 478  * last character read using getch() is passed to the next read: this is
 479  * usually a CR so this can be trouble. No STDIO fix seems to work but
 480  * flushing the console appears to do the trick.
 481  */
 482                 {
 483                         HANDLE inh;
 484                         inh = GetStdHandle(STD_INPUT_HANDLE);
 485                         FlushConsoleInputBuffer(inh);
 486                 }
 487 #endif
 488         return(strlen(buf));
 489         }
 490 #endif