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