aboutsummaryrefslogtreecommitdiffstats
path: root/crypto/des/read_pwd.c
blob: 080d3e8dfc4c5c82a04f18bc1c388948e423600b (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
/* crypto/des/read_pwd.c */
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
 * All rights reserved.
 *
 * This package is an SSL implementation written
 * by Eric Young (eay@cryptsoft.com).
 * The implementation was written so as to conform with Netscapes SSL.
 *
 * This library is free for commercial and non-commercial use as long as
 * the following conditions are aheared to.  The following conditions
 * apply to all code found in this distribution, be it the RC4, RSA,
 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
 * included with this distribution is covered by the same copyright terms
 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
 *
 * Copyright remains Eric Young's, and as such any Copyright notices in
 * the code are not to be removed.
 * If this package is used in a product, Eric Young should be given attribution
 * as the author of the parts of the library used.
 * This can be in the form of a textual message at program startup or
 * in documentation (online or textual) provided with the package.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *    "This product includes cryptographic software written by
 *     Eric Young (eay@cryptsoft.com)"
 *    The word 'cryptographic' can be left out if the rouines from the library
 *    being used are not cryptographic related :-).
 * 4. If you include any Windows specific code (or a derivative thereof) from
 *    the apps directory (application code) you must include an acknowledgement:
 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
 *
 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * The licence and distribution terms for any publically available version or
 * derivative of this code cannot be changed.  i.e. this code cannot simply be
 * copied and put under another distribution licence
 * [including the GNU Public Licence.]
 */

#include <openssl/e_os2.h>
#if !defined(OPENSSL_SYS_MSDOS) && !defined(OPENSSL_SYS_VMS) && !defined(OPENSSL_SYS_WIN32)
# ifdef OPENSSL_UNISTD
#  include OPENSSL_UNISTD
# else
#  include <unistd.h>
# endif
/*
 * If unistd.h defines _POSIX_VERSION, we conclude that we are on a POSIX
 * system and have sigaction and termios.
 */
# if defined(_POSIX_VERSION)

#  define SIGACTION
#  if !defined(TERMIOS) && !defined(TERMIO) && !defined(SGTTY)
#   define TERMIOS
#  endif

# endif
#endif

/* Define this if you have sigaction() */
/* #define SIGACTION */

#ifdef WIN16TTY
# undef OPENSSL_SYS_WIN16
# undef _WINDOWS
# include <graph.h>
#endif

/* 06-Apr-92 Luke Brennan    Support for VMS */
#include "des_locl.h"
#include "cryptlib.h"
#include <signal.h>
#include <stdio.h>
#include <string.h>
#include <setjmp.h>
#include <errno.h>

#ifdef OPENSSL_SYS_VMS          /* prototypes for sys$whatever */
# include <starlet.h>
# ifdef __DECC
#  pragma message disable DOLLARID
# endif
#endif

#ifdef WIN_CONSOLE_BUG
# include <windows.h>
# ifndef OPENSSL_SYS_WINCE
#  include <wincon.h>
# endif
#endif

/*
 * There are 5 types of terminal interface supported, TERMIO, TERMIOS, VMS,
 * MSDOS and SGTTY
 */

#if defined(__sgi) && !defined(TERMIOS)
# define TERMIOS
# undef  TERMIO
# undef  SGTTY
#endif

#if defined(linux) && !defined(TERMIO)
# undef  TERMIOS
# define TERMIO
# undef  SGTTY
#endif

#ifdef _LIBC
# undef  TERMIOS
# define TERMIO
# undef  SGTTY
#endif

#if !defined(TERMIO) && !defined(TERMIOS) && !defined(OPENSSL_SYS_VMS) && !defined(OPENSSL_SYS_MSDOS) && !defined(MAC_OS_pre_X) && !defined(MAC_OS_GUSI_SOURCE)
# undef  TERMIOS
# undef  TERMIO
# define SGTTY
#endif

#if defined(OPENSSL_SYS_VXWORKS)
# undef TERMIOS
# undef TERMIO
# undef SGTTY
#endif

#ifdef TERMIOS
# include <termios.h>
# define TTY_STRUCT              struct termios
# define TTY_FLAGS               c_lflag
# define TTY_get(tty,data)       tcgetattr(tty,data)
# define TTY_set(tty,data)       tcsetattr(tty,TCSANOW,data)
#endif

#ifdef TERMIO
# include <termio.h>
# define TTY_STRUCT              struct termio
# define TTY_FLAGS               c_lflag
# define TTY_get(tty,data)       ioctl(tty,TCGETA,data)
# define TTY_set(tty,data)       ioctl(tty,TCSETA,data)
#endif

#ifdef SGTTY
# include <sgtty.h>
# define TTY_STRUCT              struct sgttyb
# define TTY_FLAGS               sg_flags
# define TTY_get(tty,data)       ioctl(tty,TIOCGETP,data)
# define TTY_set(tty,data)       ioctl(tty,TIOCSETP,data)
#endif

#if !defined(_LIBC) && !defined(OPENSSL_SYS_MSDOS) && !defined(OPENSSL_SYS_VMS) && !defined(MAC_OS_pre_X)
# include <sys/ioctl.h>
#endif

#if defined(OPENSSL_SYS_MSDOS) && !defined(OPENSSL_SYS_WINCE)
# include <conio.h>
# define fgets(a,b,c) noecho_fgets(a,b,c)
#endif

#ifdef OPENSSL_SYS_VMS
# include <ssdef.h>
# include <iodef.h>
# include <ttdef.h>
# include <descrip.h>
struct IOSB {
    short iosb$w_value;
    short iosb$w_count;
    long iosb$l_info;
};
#endif

#if defined(MAC_OS_pre_X) || defined(MAC_OS_GUSI_SOURCE)
/*
 * This one needs work. As a matter of fact the code is unoperational
 * and this is only a trick to get it compiled.
 *                                      <appro@fy.chalmers.se>
 */
# define TTY_STRUCT int
#endif

#ifndef NX509_SIG
# define NX509_SIG 32
#endif

static void read_till_nl(FILE *);
static void recsig(int);
static void pushsig(void);
static void popsig(void);
#if defined(OPENSSL_SYS_MSDOS) && !defined(OPENSSL_SYS_WIN16)
static int noecho_fgets(char *buf, int size, FILE *tty);
#endif
#ifdef SIGACTION
static struct sigaction savsig[NX509_SIG];
#else
static void (*savsig[NX509_SIG]) (int);
#endif
static jmp_buf save;

int des_read_pw_string(char *buf, int length, const char *prompt, int verify)
{
    char buff[BUFSIZ];
    int ret;

    ret =
        des_read_pw(buf, buff, (length > BUFSIZ) ? BUFSIZ : length, prompt,
                    verify);
    OPENSSL_cleanse(buff, BUFSIZ);
    return (ret);
}

#ifdef OPENSSL_SYS_WINCE

int des_read_pw(char *buf, char *buff, int size, const char *prompt,
                int verify)
{
    memset(buf, 0, size);
    memset(buff, 0, size);
    return (0);
}

#elif defined(OPENSSL_SYS_WIN16)

int des_read_pw(char *buf, char *buff, int size, char *prompt, int verify)
{
    memset(buf, 0, size);
    memset(buff, 0, size);
    return (0);
}

#else                           /* !OPENSSL_SYS_WINCE && !OPENSSL_SYS_WIN16 */

static void read_till_nl(FILE *in)
{
# define SIZE 4
    char buf[SIZE + 1];

    do {
        fgets(buf, SIZE, in);
    } while (strchr(buf, '\n') == NULL);
}

/* return 0 if ok, 1 (or -1) otherwise */
int des_read_pw(char *buf, char *buff, int size, const char *prompt,
                int verify)
{
# ifdef OPENSSL_SYS_VMS
    struct IOSB iosb;
    $DESCRIPTOR(terminal, "TT");
    long tty_orig[3], tty_new[3];
    long status;
    unsigned short channel = 0;
# else
#  if !defined(OPENSSL_SYS_MSDOS) || defined(__DJGPP__)
    TTY_STRUCT tty_orig, tty_new;
#  endif
# endif
    int number;
    int ok;
    /*
     * statics are simply to avoid warnings about longjmp clobbering things
     */
    static int ps;
    int is_a_tty;
    static FILE *tty;
    char *p;

    if (setjmp(save)) {
        ok = 0;
        goto error;
    }

    number = 5;
    ok = 0;
    ps = 0;
    is_a_tty = 1;
    tty = NULL;

# ifdef OPENSSL_SYS_MSDOS
    if ((tty = fopen("con", "r")) == NULL)
        tty = stdin;
# elif defined(MAC_OS_pre_X) || defined(OPENSSL_SYS_VXWORKS)
    tty = stdin;
# else
#  ifndef OPENSSL_SYS_MPE
    if ((tty = fopen("/dev/tty", "r")) == NULL)
#  endif
        tty = stdin;
# endif

# if defined(TTY_get) && !defined(OPENSSL_SYS_VMS)
    if (TTY_get(fileno(tty), &tty_orig) == -1) {
#  ifdef ENOTTY
        if (errno == ENOTTY)
            is_a_tty = 0;
        else
#  endif
#  ifdef EINVAL
            /*
             * Ariel Glenn ariel@columbia.edu reports that solaris can return
             * EINVAL instead.  This should be ok
             */
        if (errno == EINVAL)
            is_a_tty = 0;
        else
#  endif
            return (-1);
    }
    memcpy(&(tty_new), &(tty_orig), sizeof(tty_orig));
# endif
# ifdef OPENSSL_SYS_VMS
    status = sys$assign(&terminal, &channel, 0, 0);
    if (status != SS$_NORMAL)
        return (-1);
    status =
        sys$qiow(0, channel, IO$_SENSEMODE, &iosb, 0, 0, tty_orig, 12, 0, 0,
                 0, 0);
    if ((status != SS$_NORMAL) || (iosb.iosb$w_value != SS$_NORMAL))
        return (-1);
# endif

    pushsig();
    ps = 1;

# ifdef TTY_FLAGS
    tty_new.TTY_FLAGS &= ~ECHO;
# endif

# if defined(TTY_set) && !defined(OPENSSL_SYS_VMS)
    if (is_a_tty && (TTY_set(fileno(tty), &tty_new) == -1))
#  ifdef OPENSSL_SYS_MPE
        ;                       /* MPE lies -- echo really has been disabled */
#  else
        return (-1);
#  endif
# endif
# ifdef OPENSSL_SYS_VMS
    tty_new[0] = tty_orig[0];
    tty_new[1] = tty_orig[1] | TT$M_NOECHO;
    tty_new[2] = tty_orig[2];
    status =
        sys$qiow(0, channel, IO$_SETMODE, &iosb, 0, 0, tty_new, 12, 0, 0, 0,
                 0);
    if ((status != SS$_NORMAL) || (iosb.iosb$w_value != SS$_NORMAL))
        return (-1);
# endif
    ps = 2;

    while ((!ok) && (number--)) {
        fputs(prompt, stderr);
        fflush(stderr);

        buf[0] = '\0';
        fgets(buf, size, tty);
        if (feof(tty))
            goto error;
        if (ferror(tty))
            goto error;
        if ((p = (char *)strchr(buf, '\n')) != NULL)
            *p = '\0';
        else
            read_till_nl(tty);
        if (verify) {
            fprintf(stderr, "\nVerifying password - %s", prompt);
            fflush(stderr);
            buff[0] = '\0';
            fgets(buff, size, tty);
            if (feof(tty))
                goto error;
            if ((p = (char *)strchr(buff, '\n')) != NULL)
                *p = '\0';
            else
                read_till_nl(tty);

            if (strcmp(buf, buff) != 0) {
                fprintf(stderr, "\nVerify failure");
                fflush(stderr);
                break;
                /* continue; */
            }
        }
        ok = 1;
    }

 error:
    fprintf(stderr, "\n");
# if 0
    perror("fgets(tty)");
# endif
    /* What can we do if there is an error? */
# if defined(TTY_set) && !defined(OPENSSL_SYS_VMS)
    if (ps >= 2)
        TTY_set(fileno(tty), &tty_orig);
# endif
# ifdef OPENSSL_SYS_VMS
    if (ps >= 2)
        status =
            sys$qiow(0, channel, IO$_SETMODE, &iosb, 0, 0, tty_orig, 12, 0, 0,
                     0, 0);
# endif

    if (ps >= 1)
        popsig();
    if (stdin != tty)
        fclose(tty);
# ifdef OPENSSL_SYS_VMS
    status = sys$dassgn(channel);
# endif
    return (!ok);
}

static void pushsig(void)
{
    int i;
# ifdef SIGACTION
    struct sigaction sa;

    memset(&sa, 0, sizeof(sa));
    sa.sa_handler = recsig;
# endif

    for (i = 1; i < NX509_SIG; i++) {
# ifdef SIGUSR1
        if (i == SIGUSR1)
            continue;
# endif
# ifdef SIGUSR2
        if (i == SIGUSR2)
            continue;
# endif
# ifdef SIGACTION
        sigaction(i, &sa, &savsig[i]);
# else
        savsig[i] = signal(i, recsig);
# endif
    }

# ifdef SIGWINCH
    signal(SIGWINCH, SIG_DFL);
# endif
}

static void popsig(void)
{
    int i;

    for (i = 1; i < NX509_SIG; i++) {
# ifdef SIGUSR1
        if (i == SIGUSR1)
            continue;
# endif
# ifdef SIGUSR2
        if (i == SIGUSR2)
            continue;
# endif
# ifdef SIGACTION
        sigaction(i, &savsig[i], NULL);
# else
        signal(i, savsig[i]);
# endif
    }
}

static void recsig(int i)
{
    longjmp(save, 1);
# ifdef LINT
    i = i;
# endif
}

# ifdef OPENSSL_SYS_MSDOS
static int noecho_fgets(char *buf, int size, FILE *tty)
{
    int i;
    char *p;

    p = buf;
    for (;;) {
        if (size == 0) {
            *p = '\0';
            break;
        }
        size--;
#  ifdef WIN16TTY
        i = _inchar();
#  else
        i = getch();
#  endif
        if (i == '\r')
            i = '\n';
        *(p++) = i;
        if (i == '\n') {
            *p = '\0';
            break;
        }
    }
#  ifdef WIN_CONSOLE_BUG
    /*
     * Win95 has several evil console bugs: one of these is that the last
     * character read using getch() is passed to the next read: this is
     * usually a CR so this can be trouble. No STDIO fix seems to work but
     * flushing the console appears to do the trick.
     */
    {
        HANDLE inh;
        inh = GetStdHandle(STD_INPUT_HANDLE);
        FlushConsoleInputBuffer(inh);
    }
#  endif
    return (strlen(buf));
}
# endif
#endif                          /* !OPENSSL_SYS_WINCE && !WIN16 */