/* 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 SIGACTION */ /* Define this if you have 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(__CYGWIN32__) && !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 */