read_pwd.c revision 225736 
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#include <openssl/e_os2.h>
60#if !defined(OPENSSL_SYS_MSDOS) && !defined(OPENSSL_SYS_VMS) && !defined(OPENSSL_SYS_WIN32)
61#ifdef OPENSSL_UNISTD
62# include OPENSSL_UNISTD
63#else
64# include <unistd.h>
65#endif
66/* If unistd.h defines _POSIX_VERSION, we conclude that we
67 * are on a POSIX system and have sigaction and termios. */
68#if defined(_POSIX_VERSION)
69
70# define SIGACTION
71# if !defined(TERMIOS) && !defined(TERMIO) && !defined(SGTTY)
72# define TERMIOS
73# endif
74
75#endif
76#endif
77
78/* #define SIGACTION */ /* Define this if you have sigaction() */
79
80#ifdef WIN16TTY
81#undef OPENSSL_SYS_WIN16
82#undef _WINDOWS
83#include <graph.h>
84#endif
85
86/* 06-Apr-92 Luke Brennan    Support for VMS */
87#include "des_locl.h"
88#include "cryptlib.h"
89#include <signal.h>
90#include <stdio.h>
91#include <string.h>
92#include <setjmp.h>
93#include <errno.h>
94
95#ifdef OPENSSL_SYS_VMS			/* prototypes for sys$whatever */
96#include <starlet.h>
97#ifdef __DECC
98#pragma message disable DOLLARID
99#endif
100#endif
101
102#ifdef WIN_CONSOLE_BUG
103#include <windows.h>
104#ifndef OPENSSL_SYS_WINCE
105#include <wincon.h>
106#endif
107#endif
108
109
110/* There are 5 types of terminal interface supported,
111 * TERMIO, TERMIOS, VMS, MSDOS and SGTTY
112 */
113
114#if defined(__sgi) && !defined(TERMIOS)
115#define TERMIOS
116#undef  TERMIO
117#undef  SGTTY
118#endif
119
120#if defined(linux) && !defined(TERMIO)
121#undef  TERMIOS
122#define TERMIO
123#undef  SGTTY
124#endif
125
126#ifdef _LIBC
127#undef  TERMIOS
128#define TERMIO
129#undef  SGTTY
130#endif
131
132#if !defined(TERMIO) && !defined(TERMIOS) && !defined(OPENSSL_SYS_VMS) && !defined(OPENSSL_SYS_MSDOS) && !defined(MAC_OS_pre_X) && !defined(MAC_OS_GUSI_SOURCE)
133#undef  TERMIOS
134#undef  TERMIO
135#define SGTTY
136#endif
137
138#if defined(OPENSSL_SYS_VXWORKS)
139#undef TERMIOS
140#undef TERMIO
141#undef SGTTY
142#endif
143
144#ifdef TERMIOS
145#include <termios.h>
146#define TTY_STRUCT		struct termios
147#define TTY_FLAGS		c_lflag
148#define	TTY_get(tty,data)	tcgetattr(tty,data)
149#define TTY_set(tty,data)	tcsetattr(tty,TCSANOW,data)
150#endif
151
152#ifdef TERMIO
153#include <termio.h>
154#define TTY_STRUCT		struct termio
155#define TTY_FLAGS		c_lflag
156#define TTY_get(tty,data)	ioctl(tty,TCGETA,data)
157#define TTY_set(tty,data)	ioctl(tty,TCSETA,data)
158#endif
159
160#ifdef SGTTY
161#include <sgtty.h>
162#define TTY_STRUCT		struct sgttyb
163#define TTY_FLAGS		sg_flags
164#define TTY_get(tty,data)	ioctl(tty,TIOCGETP,data)
165#define TTY_set(tty,data)	ioctl(tty,TIOCSETP,data)
166#endif
167
168#if !defined(_LIBC) && !defined(OPENSSL_SYS_MSDOS) && !defined(OPENSSL_SYS_VMS) && !defined(MAC_OS_pre_X)
169#include <sys/ioctl.h>
170#endif
171
172#if defined(OPENSSL_SYS_MSDOS) && !defined(__CYGWIN32__) && !defined(OPENSSL_SYS_WINCE)
173#include <conio.h>
174#define fgets(a,b,c) noecho_fgets(a,b,c)
175#endif
176
177#ifdef OPENSSL_SYS_VMS
178#include <ssdef.h>
179#include <iodef.h>
180#include <ttdef.h>
181#include <descrip.h>
182struct IOSB {
183	short iosb$w_value;
184	short iosb$w_count;
185	long  iosb$l_info;
186	};
187#endif
188
189#if defined(MAC_OS_pre_X) || defined(MAC_OS_GUSI_SOURCE)
190/*
191 * This one needs work. As a matter of fact the code is unoperational
192 * and this is only a trick to get it compiled.
193 *					<appro@fy.chalmers.se>
194 */
195#define TTY_STRUCT int
196#endif
197
198#ifndef NX509_SIG
199#define NX509_SIG 32
200#endif
201
202static void read_till_nl(FILE *);
203static void recsig(int);
204static void pushsig(void);
205static void popsig(void);
206#if defined(OPENSSL_SYS_MSDOS) && !defined(OPENSSL_SYS_WIN16)
207static int noecho_fgets(char *buf, int size, FILE *tty);
208#endif
209#ifdef SIGACTION
210 static struct sigaction savsig[NX509_SIG];
211#else
212  static void (*savsig[NX509_SIG])(int );
213#endif
214static jmp_buf save;
215
216int des_read_pw_string(char *buf, int length, const char *prompt,
217	     int verify)
218	{
219	char buff[BUFSIZ];
220	int ret;
221
222	ret=des_read_pw(buf,buff,(length>BUFSIZ)?BUFSIZ:length,prompt,verify);
223	OPENSSL_cleanse(buff,BUFSIZ);
224	return(ret);
225	}
226
227#ifdef OPENSSL_SYS_WINCE
228
229int des_read_pw(char *buf, char *buff, int size, const char *prompt, int verify)
230	{
231	memset(buf,0,size);
232	memset(buff,0,size);
233	return(0);
234	}
235
236#elif defined(OPENSSL_SYS_WIN16)
237
238int des_read_pw(char *buf, char *buff, int size, char *prompt, int verify)
239	{
240	memset(buf,0,size);
241	memset(buff,0,size);
242	return(0);
243	}
244
245#else /* !OPENSSL_SYS_WINCE && !OPENSSL_SYS_WIN16 */
246
247static void read_till_nl(FILE *in)
248	{
249#define SIZE 4
250	char buf[SIZE+1];
251
252	do	{
253		fgets(buf,SIZE,in);
254		} while (strchr(buf,'\n') == NULL);
255	}
256
257
258/* return 0 if ok, 1 (or -1) otherwise */
259int des_read_pw(char *buf, char *buff, int size, const char *prompt,
260	     int verify)
261	{
262#ifdef OPENSSL_SYS_VMS
263	struct IOSB iosb;
264	$DESCRIPTOR(terminal,"TT");
265	long tty_orig[3], tty_new[3];
266	long status;
267	unsigned short channel = 0;
268#else
269#if !defined(OPENSSL_SYS_MSDOS) || defined(__DJGPP__)
270	TTY_STRUCT tty_orig,tty_new;
271#endif
272#endif
273	int number;
274	int ok;
275	/* statics are simply to avoid warnings about longjmp clobbering
276	   things */
277	static int ps;
278	int is_a_tty;
279	static FILE *tty;
280	char *p;
281
282	if (setjmp(save))
283		{
284		ok=0;
285		goto error;
286		}
287
288	number=5;
289	ok=0;
290	ps=0;
291	is_a_tty=1;
292	tty=NULL;
293
294#ifdef OPENSSL_SYS_MSDOS
295	if ((tty=fopen("con","r")) == NULL)
296		tty=stdin;
297#elif defined(MAC_OS_pre_X) || defined(OPENSSL_SYS_VXWORKS)
298	tty=stdin;
299#else
300#ifndef OPENSSL_SYS_MPE
301	if ((tty=fopen("/dev/tty","r")) == NULL)
302#endif
303		tty=stdin;
304#endif
305
306#if defined(TTY_get) && !defined(OPENSSL_SYS_VMS)
307	if (TTY_get(fileno(tty),&tty_orig) == -1)
308		{
309#ifdef ENOTTY
310		if (errno == ENOTTY)
311			is_a_tty=0;
312		else
313#endif
314#ifdef EINVAL
315		/* Ariel Glenn ariel@columbia.edu reports that solaris
316		 * can return EINVAL instead.  This should be ok */
317		if (errno == EINVAL)
318			is_a_tty=0;
319		else
320#endif
321			return(-1);
322		}
323	memcpy(&(tty_new),&(tty_orig),sizeof(tty_orig));
324#endif
325#ifdef OPENSSL_SYS_VMS
326	status = sys$assign(&terminal,&channel,0,0);
327	if (status != SS$_NORMAL)
328		return(-1);
329	status=sys$qiow(0,channel,IO$_SENSEMODE,&iosb,0,0,tty_orig,12,0,0,0,0);
330	if ((status != SS$_NORMAL) || (iosb.iosb$w_value != SS$_NORMAL))
331		return(-1);
332#endif
333
334	pushsig();
335	ps=1;
336
337#ifdef TTY_FLAGS
338	tty_new.TTY_FLAGS &= ~ECHO;
339#endif
340
341#if defined(TTY_set) && !defined(OPENSSL_SYS_VMS)
342	if (is_a_tty && (TTY_set(fileno(tty),&tty_new) == -1))
343#ifdef OPENSSL_SYS_MPE
344		; /* MPE lies -- echo really has been disabled */
345#else
346		return(-1);
347#endif
348#endif
349#ifdef OPENSSL_SYS_VMS
350	tty_new[0] = tty_orig[0];
351	tty_new[1] = tty_orig[1] | TT$M_NOECHO;
352	tty_new[2] = tty_orig[2];
353	status = sys$qiow(0,channel,IO$_SETMODE,&iosb,0,0,tty_new,12,0,0,0,0);
354	if ((status != SS$_NORMAL) || (iosb.iosb$w_value != SS$_NORMAL))
355		return(-1);
356#endif
357	ps=2;
358
359	while ((!ok) && (number--))
360		{
361		fputs(prompt,stderr);
362		fflush(stderr);
363
364		buf[0]='\0';
365		fgets(buf,size,tty);
366		if (feof(tty)) goto error;
367		if (ferror(tty)) goto error;
368		if ((p=(char *)strchr(buf,'\n')) != NULL)
369			*p='\0';
370		else	read_till_nl(tty);
371		if (verify)
372			{
373			fprintf(stderr,"\nVerifying password - %s",prompt);
374			fflush(stderr);
375			buff[0]='\0';
376			fgets(buff,size,tty);
377			if (feof(tty)) goto error;
378			if ((p=(char *)strchr(buff,'\n')) != NULL)
379				*p='\0';
380			else	read_till_nl(tty);
381
382			if (strcmp(buf,buff) != 0)
383				{
384				fprintf(stderr,"\nVerify failure");
385				fflush(stderr);
386				break;
387				/* continue; */
388				}
389			}
390		ok=1;
391		}
392
393error:
394	fprintf(stderr,"\n");
395#if 0
396	perror("fgets(tty)");
397#endif
398	/* What can we do if there is an error? */
399#if defined(TTY_set) && !defined(OPENSSL_SYS_VMS)
400	if (ps >= 2) TTY_set(fileno(tty),&tty_orig);
401#endif
402#ifdef OPENSSL_SYS_VMS
403	if (ps >= 2)
404		status = sys$qiow(0,channel,IO$_SETMODE,&iosb,0,0
405			,tty_orig,12,0,0,0,0);
406#endif
407
408	if (ps >= 1) popsig();
409	if (stdin != tty) fclose(tty);
410#ifdef OPENSSL_SYS_VMS
411	status = sys$dassgn(channel);
412#endif
413	return(!ok);
414	}
415
416static void pushsig(void)
417	{
418	int i;
419#ifdef SIGACTION
420	struct sigaction sa;
421
422	memset(&sa,0,sizeof sa);
423	sa.sa_handler=recsig;
424#endif
425
426	for (i=1; i<NX509_SIG; i++)
427		{
428#ifdef SIGUSR1
429		if (i == SIGUSR1)
430			continue;
431#endif
432#ifdef SIGUSR2
433		if (i == SIGUSR2)
434			continue;
435#endif
436#ifdef SIGACTION
437		sigaction(i,&sa,&savsig[i]);
438#else
439		savsig[i]=signal(i,recsig);
440#endif
441		}
442
443#ifdef SIGWINCH
444	signal(SIGWINCH,SIG_DFL);
445#endif
446	}
447
448static void popsig(void)
449	{
450	int i;
451
452	for (i=1; i<NX509_SIG; i++)
453		{
454#ifdef SIGUSR1
455		if (i == SIGUSR1)
456			continue;
457#endif
458#ifdef SIGUSR2
459		if (i == SIGUSR2)
460			continue;
461#endif
462#ifdef SIGACTION
463		sigaction(i,&savsig[i],NULL);
464#else
465		signal(i,savsig[i]);
466#endif
467		}
468	}
469
470static void recsig(int i)
471	{
472	longjmp(save,1);
473#ifdef LINT
474	i=i;
475#endif
476	}
477
478#ifdef OPENSSL_SYS_MSDOS
479static int noecho_fgets(char *buf, int size, FILE *tty)
480	{
481	int i;
482	char *p;
483
484	p=buf;
485	for (;;)
486		{
487		if (size == 0)
488			{
489			*p='\0';
490			break;
491			}
492		size--;
493#ifdef WIN16TTY
494		i=_inchar();
495#else
496		i=getch();
497#endif
498		if (i == '\r') i='\n';
499		*(p++)=i;
500		if (i == '\n')
501			{
502			*p='\0';
503			break;
504			}
505		}
506#ifdef WIN_CONSOLE_BUG
507/* Win95 has several evil console bugs: one of these is that the
508 * last character read using getch() is passed to the next read: this is
509 * usually a CR so this can be trouble. No STDIO fix seems to work but
510 * flushing the console appears to do the trick.
511 */
512		{
513			HANDLE inh;
514			inh = GetStdHandle(STD_INPUT_HANDLE);
515			FlushConsoleInputBuffer(inh);
516		}
517#endif
518	return(strlen(buf));
519	}
520#endif
521#endif /* !OPENSSL_SYS_WINCE && !WIN16 */
522