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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>
139struct 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
151static void read_till_nl(FILE *);
152static void recsig(int);
153static void pushsig(void);
154static void popsig(void);
155#if defined(MSDOS) && !defined(WIN16)
156static int noecho_fgets(char *buf, int size, FILE *tty);
157#endif
158#else
159static void read_till_nl();
160static void recsig();
161static void pushsig();
162static void popsig();
163#if defined(MSDOS) && !defined(WIN16)
164static 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
177static jmp_buf save;
178
179int des_read_pw_string(buf, length, prompt, verify)
180char *buf;
181int length;
182char *prompt;
183int 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
195static void read_till_nl(in)
196FILE *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 */
208int des_read_pw(buf, buff, size, prompt, verify)
209char *buf;
210char *buff;
211int size;
212char *prompt;
213int 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
330error:
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
355int des_read_pw(buf, buff, size, prompt, verify)
356char *buf;
357char *buff;
358int size;
359char *prompt;
360int verify;
361 {
362 memset(buf,0,size);
363 memset(buff,0,size);
364 return(0);
365 }
366
367#endif
368
369static 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
395static 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
417static void recsig(i)
418int i;
419 {
420 longjmp(save,1);
421#ifdef LINT
422 i=i;
423#endif
424 }
425
426#if defined(MSDOS) && !defined(WIN16)
427static int noecho_fgets(buf,size,tty)
428char *buf;
429int size;
430FILE *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