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