crypto/heimdal-0.6.3/lib/des/read_pwd.c

   1 /* crypto/des/read_pwd.c */
   2 /* Copyright (C) 1995-1997 Eric Young (eay@mincom.oz.au)
   3  * All rights reserved.
   4  *
   5  * This package is an SSL implementation written
   6  * by Eric Young (eay@mincom.oz.au).
   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@mincom.oz.au).
  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@mincom.oz.au)"
  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@mincom.oz.au)"
  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 #ifdef WIN16TTY
  60 #undef WIN16
  61 #undef _WINDOWS
  62 #include <graph.h>
  63 #endif
  64
  65 /* 06-Apr-92 Luke Brennan    Support for VMS */
  66 #include "des_locl.h"
  67 #include <signal.h>
  68 #include <string.h>
  69 #include <setjmp.h>
  70 #include <errno.h>
  71
  72 /* There are 5 types of terminal interface supported,
  73  * TERMIO, TERMIOS, VMS, MSDOS and SGTTY
  74  */
  75
  76 #if defined(__sgi) && !defined(TERMIOS)
  77 #define TERMIOS
  78 #undef TERMIO
  79 #undef SGTTY
  80 #endif
  81
  82 #if defined(linux) && !defined(TERMIO)
  83 #undef TERMIOS
  84 #define TERMIO
  85 #undef SGTTY
  86 #endif
  87
  88 #ifdef _LIBC
  89 #define TERMIO
  90 #endif
  91
  92 #if !defined(TERMIO) && !defined(TERMIOS) && !defined(VMS) && !defined(MSDOS)
  93 #define SGTTY
  94 #endif
  95
  96 #if defined(HAVE_SGTTY_H) && defined(__NeXT__)
  97 #define SGTTY
  98 #endif
  99
 100 #ifdef TERMIOS
 101 #include <termios.h>
 102 #define TTY_STRUCT              struct termios
 103 #define TTY_FLAGS               c_lflag
 104 #define TTY_get(tty,data)       tcgetattr(tty,data)
 105 #define TTY_set(tty,data)       tcsetattr(tty,TCSANOW,data)
 106 #endif
 107
 108 #ifdef TERMIO
 109 #include <termio.h>
 110 #define TTY_STRUCT              struct termio
 111 #define TTY_FLAGS               c_lflag
 112 #define TTY_get(tty,data)       ioctl(tty,TCGETA,data)
 113 #define TTY_set(tty,data)       ioctl(tty,TCSETA,data)
 114 #endif
 115
 116 #ifdef SGTTY
 117 #include <sgtty.h>
 118 #define TTY_STRUCT              struct sgttyb
 119 #define TTY_FLAGS               sg_flags
 120 #define TTY_get(tty,data)       ioctl(tty,TIOCGETP,data)
 121 #define TTY_set(tty,data)       ioctl(tty,TIOCSETP,data)
 122 #endif
 123
 124 #if !defined(_LIBC) && !defined(MSDOS) && !defined(VMS)
 125 #include <sys/ioctl.h>
 126 #endif
 127
 128 #ifdef MSDOS
 129 #include <conio.h>
 130 #define fgets(a,b,c) noecho_fgets(a,b,c)
 131 #endif
 132
 133 #ifdef VMS
 134 #include <ssdef.h>
 135 #include <iodef.h>
 136 #include <ttdef.h>
 137 #include <descrip.h>
 138 struct IOSB {
 139         short iosb$w_value;
 140         short iosb$w_count;
 141         long  iosb$l_info;
 142         };
 143 #endif
 144
 145 #ifndef NX509_SIG
 146 #define NX509_SIG 32
 147 #endif
 148
 149 #ifndef NOPROTO
 150 static void read_till_nl(FILE *);
 151 static int read_pw(char *buf, char *buff, int size, char *prompt, int verify);
 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 int read_pw();
 161 static void recsig();
 162 static void pushsig();
 163 static void popsig();
 164 #if defined(MSDOS) && !defined(WIN16)
 165 static int noecho_fgets();
 166 #endif
 167 #endif
 168
 169 #ifndef NOPROTO
 170 static void (*savsig[NX509_SIG])(int );
 171 #else
 172 static void (*savsig[NX509_SIG])();
 173 #endif
 174 static jmp_buf save;
 175
 176 int des_read_password(key, prompt, verify)
 177 des_cblock (*key);
 178 char *prompt;
 179 int verify;
 180         {
 181         int ok;
 182         char buf[BUFSIZ],buff[BUFSIZ];
 183
 184         if ((ok=read_pw(buf,buff,BUFSIZ,prompt,verify)) == 0)
 185                 des_string_to_key(buf,key);
 186         memset(buf,0,BUFSIZ);
 187         memset(buff,0,BUFSIZ);
 188         return(ok);
 189         }
 190
 191 int des_read_2passwords(key1, key2, prompt, verify)
 192 des_cblock (*key1);
 193 des_cblock (*key2);
 194 char *prompt;
 195 int verify;
 196         {
 197         int ok;
 198         char buf[BUFSIZ],buff[BUFSIZ];
 199
 200         if ((ok=read_pw(buf,buff,BUFSIZ,prompt,verify)) == 0)
 201                 des_string_to_2keys(buf,key1,key2);
 202         memset(buf,0,BUFSIZ);
 203         memset(buff,0,BUFSIZ);
 204         return(ok);
 205         }
 206
 207 int des_read_pw_string(buf, length, prompt, verify)
 208 char *buf;
 209 int length;
 210 char *prompt;
 211 int verify;
 212         {
 213         char buff[BUFSIZ];
 214         int ret;
 215
 216         ret=read_pw(buf,buff,(length>BUFSIZ)?BUFSIZ:length,prompt,verify);
 217         memset(buff,0,BUFSIZ);
 218         return(ret);
 219         }
 220
 221 #ifndef WIN16
 222
 223 static void read_till_nl(in)
 224 FILE *in;
 225         {
 226 #define SIZE 4
 227         char buf[SIZE+1];
 228
 229         do      {
 230                 fgets(buf,SIZE,in);
 231                 } while (strchr(buf,'\n') == NULL);
 232         }
 233
 234
 235 /* return 0 if ok, 1 (or -1) otherwise */
 236 static int read_pw(buf, buff, size, prompt, verify)
 237 char *buf;
 238 char *buff;
 239 int size;
 240 char *prompt;
 241 int verify;
 242         {
 243 #ifdef VMS
 244         struct IOSB iosb;
 245         $DESCRIPTOR(terminal,"TT");
 246         long tty_orig[3], tty_new[3];
 247         long status;
 248         unsigned short channel = 0;
 249 #else
 250 #ifndef MSDOS
 251         TTY_STRUCT tty_orig,tty_new;
 252 #endif
 253 #endif
 254         int number=5;
 255         int ok=0;
 256         int ps=0;
 257         int is_a_tty=1;
 258
 259         FILE *tty=NULL;
 260         char *p;
 261
 262 #ifdef __CYGWIN32__
 263         tty = stdin;
 264 #elif !defined(MSDOS)
 265         if ((tty=fopen("/dev/tty","r")) == NULL)
 266                 tty=stdin;
 267 #else /* MSDOS */
 268         if ((tty=fopen("con","r")) == NULL)
 269                 tty=stdin;
 270 #endif /* MSDOS */
 271
 272 #if defined(TTY_get) && !defined(VMS)
 273         if (TTY_get(fileno(tty),&tty_orig) == -1)
 274                 {
 275 #ifdef ENOTTY
 276                 if (errno == ENOTTY)
 277                         is_a_tty=0;
 278                 else
 279 #endif
 280                         return(-1);
 281                 }
 282         memcpy(&(tty_new),&(tty_orig),sizeof(tty_orig));
 283 #endif
 284 #ifdef VMS
 285         status = SYS$ASSIGN(&terminal,&channel,0,0);
 286         if (status != SS$_NORMAL)
 287                 return(-1);
 288         status=SYS$QIOW(0,channel,IO$_SENSEMODE,&iosb,0,0,tty_orig,12,0,0,0,0);
 289         if ((status != SS$_NORMAL) || (iosb.iosb$w_value != SS$_NORMAL))
 290                 return(-1);
 291 #endif
 292
 293         if (setjmp(save))
 294                 {
 295                 ok=0;
 296                 goto error;
 297                 }
 298         pushsig();
 299         ps=1;
 300
 301 #ifdef TTY_FLAGS
 302         tty_new.TTY_FLAGS &= ~ECHO;
 303 #endif
 304
 305 #if defined(TTY_set) && !defined(VMS)
 306         if (is_a_tty && (TTY_set(fileno(tty),&tty_new) == -1))
 307                 return(-1);
 308 #endif
 309 #ifdef VMS
 310         tty_new[0] = tty_orig[0];
 311         tty_new[1] = tty_orig[1] | TT$M_NOECHO;
 312         tty_new[2] = tty_orig[2];
 313         status = SYS$QIOW(0,channel,IO$_SETMODE,&iosb,0,0,tty_new,12,0,0,0,0);
 314         if ((status != SS$_NORMAL) || (iosb.iosb$w_value != SS$_NORMAL))
 315                 return(-1);
 316 #endif
 317         ps=2;
 318
 319         while ((!ok) && (number--))
 320                 {
 321                 fputs(prompt,stderr);
 322                 fflush(stderr);
 323
 324                 buf[0]='\0';
 325                 fgets(buf,size,tty);
 326                 if (feof(tty)) goto error;
 327                 if (ferror(tty)) goto error;
 328                 if ((p=(char *)strchr(buf,'\n')) != NULL)
 329                         *p='\0';
 330                 else    read_till_nl(tty);
 331                 if (verify)
 332                         {
 333                         fprintf(stderr,"\nVerifying password - %s",prompt);
 334                         fflush(stderr);
 335                         buff[0]='\0';
 336                         fgets(buff,size,tty);
 337                         if (feof(tty)) goto error;
 338                         if ((p=(char *)strchr(buff,'\n')) != NULL)
 339                                 *p='\0';
 340                         else    read_till_nl(tty);
 341
 342                         if (strcmp(buf,buff) != 0)
 343                                 {
 344                                 fprintf(stderr,"\nVerify failure");
 345                                 fflush(stderr);
 346                                 break;
 347                                 /* continue; */
 348                                 }
 349                         }
 350                 ok=1;
 351                 }
 352
 353 error:
 354         fprintf(stderr,"\n");
 355 #ifdef DEBUG
 356         perror("fgets(tty)");
 357 #endif
 358         /* What can we do if there is an error? */
 359 #if defined(TTY_set) && !defined(VMS)
 360         if (ps >= 2) TTY_set(fileno(tty),&tty_orig);
 361 #endif
 362 #ifdef VMS
 363         if (ps >= 2)
 364                 status = SYS$QIOW(0,channel,IO$_SETMODE,&iosb,0,0
 365                         ,tty_orig,12,0,0,0,0);
 366 #endif
 367
 368         if (ps >= 1) popsig();
 369         if (stdin != tty) fclose(tty);
 370 #ifdef VMS
 371         status = SYS$DASSGN(channel);
 372 #endif
 373         return(!ok);
 374         }
 375
 376 #else /* WIN16 */
 377
 378 static int read_pw(buf, buff, size, prompt, verify)
 379 char *buf;
 380 char *buff;
 381 int size;
 382 char *prompt;
 383 int verify;
 384         {
 385         memset(buf,0,size);
 386         memset(buff,0,size);
 387         return(0);
 388         }
 389
 390 #endif
 391
 392 static void pushsig()
 393         {
 394         int i;
 395
 396         for (i=1; i<NX509_SIG; i++)
 397                 savsig[i]=signal(i,recsig);
 398
 399 #ifdef SIGWINCH
 400         signal(SIGWINCH,SIG_DFL);
 401 #endif
 402         }
 403
 404 static void popsig()
 405         {
 406         int i;
 407
 408         for (i=1; i<NX509_SIG; i++)
 409                 signal(i,savsig[i]);
 410         }
 411
 412 static void recsig(i)
 413 int i;
 414         {
 415         longjmp(save,1);
 416 #ifdef LINT
 417         i=i;
 418 #endif
 419         }
 420
 421 #if defined(MSDOS) && !defined(WIN16)
 422 static int noecho_fgets(buf,size,tty)
 423 char *buf;
 424 int size;
 425 FILE *tty;
 426         {
 427         int i;
 428         char *p;
 429
 430         p=buf;
 431         for (;;)
 432                 {
 433                 if (size == 0)
 434                         {
 435                         *p='\0';
 436                         break;
 437                         }
 438                 size--;
 439 #ifdef WIN16TTY
 440                 i=_inchar();
 441 #else
 442                 i=getch();
 443 #endif
 444                 if (i == '\r') i='\n';
 445                 *(p++)=i;
 446                 if (i == '\n')
 447                         {
 448                         *p='\0';
 449                         break;
 450                         }
 451                 }
 452         return(strlen(buf));
 453         }
 454 #endif