/* crypto/ui/ui_openssl.c -*- mode:C; c-file-style: "eay" -*- */

/* Written by Richard Levitte (richard@levitte.org) and others

 * for the OpenSSL project 2001.

 */

/* ====================================================================

 * Copyright (c) 2001 The OpenSSL Project.  All rights reserved.

 *

 * 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 above 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 acknowledgment:

 *    "This product includes software developed by the OpenSSL Project

 *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"

 *

 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to

 *    endorse or promote products derived from this software without

 *    prior written permission. For written permission, please contact

 *    openssl-core@openssl.org.

 *

 * 5. Products derived from this software may not be called "OpenSSL"

 *    nor may "OpenSSL" appear in their names without prior written

 *    permission of the OpenSSL Project.

 *

 * 6. Redistributions of any form whatsoever must retain the following

 *    acknowledgment:

 *    "This product includes software developed by the OpenSSL Project

 *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"

 *

 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY

 * EXPRESSED 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 OpenSSL PROJECT OR

 * ITS 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.

 * ====================================================================

 *

 * This product includes cryptographic software written by Eric Young

 * (eay@cryptsoft.com).  This product includes software written by Tim

 * Hudson (tjh@cryptsoft.com).

 *

 */

/* The lowest level part of this file was previously in 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.]

 */

/*

 © Portions copyright (c) 2006 Nokia Corporation.  All rights reserved.

 */

#include <openssl/e_os2.h>

/* need for #define _POSIX_C_SOURCE arises whenever you pass -ansi to gcc

 * [maybe others?], because it masks interfaces not discussed in standard,

 * sigaction and fileno included. -pedantic would be more appropriate for

 * the intended purposes, but we can't prevent users from adding -ansi.

 */

#define _POSIX_C_SOURCE 1

#if (defined(SYMBIAN) && (defined(__WINSCW__) || defined(__WINS__))) 

#undef _POSIX_C_SOURCE

#endif

#ifndef SYMBIAN

#include <signal.h> 

#endif

#include <stdio.h>

#include <string.h>

#include <errno.h>

#if !defined(OPENSSL_SYS_MSDOS) && !defined(OPENSSL_SYS_VMS)

# 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) && !defined(SYMBIAN)

#  define SIGACTION

#  if !defined(TERMIOS) && !defined(TERMIO) && !defined(SGTTY)

#   define TERMIOS

#  endif

# endif

#endif

#ifdef WIN16TTY

# undef OPENSSL_SYS_WIN16

# undef WIN16

# undef _WINDOWS

# include <graph.h>

#endif

/* 06-Apr-92 Luke Brennan    Support for VMS */

#include "ui_locl.h"

#include "cryptlib.h"

#ifdef OPENSSL_SYS_VMS		/* prototypes for sys$whatever */

# include <starlet.h>

# ifdef __DECC

#  pragma message disable DOLLARID

# endif

#endif

#ifndef SYMBIAN

#ifdef WIN_CONSOLE_BUG

# include <windows.h>

#ifndef OPENSSL_SYS_WINCE

# include <wincon.h>

#endif

#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(OPENSSL_SYS_MACINTOSH_CLASSIC) && !defined(MAC_OS_GUSI_SOURCE)

# undef  TERMIOS

# undef  TERMIO

# define SGTTY

#endif

#if defined(OPENSSL_SYS_VXWORKS)

#undef TERMIOS

#undef TERMIO

#undef SGTTY

#endif

#if defined(OPENSSL_SYS_NETWARE)

#undef TERMIOS

#undef TERMIO

#undef SGTTY

#endif

#if defined(SYMBIAN)

#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(OPENSSL_SYS_MACINTOSH_CLASSIC) && !defined(OPENSSL_SYS_SUNOS)

# include <sys/ioctl.h>

#endif

#ifdef OPENSSL_SYS_MSDOS

# include <conio.h>

#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(SYMBIAN) && (defined(__WINSCW__) || defined(__WINS__)))

#include "libcrypto_wsd_macros.h"

#include "libcrypto_wsd.h"

#endif

#ifdef OPENSSL_SYS_SUNOS

	typedef int sig_atomic_t;

#endif

#if defined(OPENSSL_SYS_MACINTOSH_CLASSIC) || defined(MAC_OS_GUSI_SOURCE) || defined(OPENSSL_SYS_NETWARE)

/*

 * 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

/* Define globals.  They are protected by a lock */

#ifdef SIGACTION

static struct sigaction savsig[NX509_SIG];

#else

static void (*savsig[NX509_SIG])(int );

#endif

#ifdef OPENSSL_SYS_VMS

static struct IOSB iosb;

static $DESCRIPTOR(terminal,"TT");

static long tty_orig[3], tty_new[3]; /* XXX   Is there any guarantee that this will always suffice for the actual structures? */

static long status;

static unsigned short channel = 0;

#else

#ifndef SYMBIAN

#if !defined(OPENSSL_SYS_MSDOS) || defined(__DJGPP__)

static TTY_STRUCT tty_orig,tty_new;

#endif

#endif

#endif

#ifndef EMULATOR

static FILE *tty_in, *tty_out;

static int is_a_tty;

#else

GET_STATIC_VAR_FROM_TLS(tty_in,ui_openssl,FILE *)

#define tty_in (*GET_WSD_VAR_NAME(tty_in,ui_openssl, s)())

GET_STATIC_VAR_FROM_TLS(tty_out,ui_openssl,FILE *)

#define tty_out (*GET_WSD_VAR_NAME(tty_out,ui_openssl, s)())

GET_STATIC_VAR_FROM_TLS(is_a_tty,ui_openssl,int)

#define is_a_tty (*GET_WSD_VAR_NAME(is_a_tty,ui_openssl, s)())

#endif

/* Declare static functions */

#if !defined(OPENSSL_SYS_WIN16) && !defined(OPENSSL_SYS_WINCE)

static void read_till_nl(FILE *);

static void recsig(int);

static void pushsig(void);

static void popsig(void);

#endif

#if defined(OPENSSL_SYS_MSDOS) && !defined(OPENSSL_SYS_WIN16)

static int noecho_fgets(char *buf, int size, FILE *tty);

#endif

static int read_string_inner(UI *ui, UI_STRING *uis, int echo, int strip_nl);

static int read_string(UI *ui, UI_STRING *uis);

static int write_string(UI *ui, UI_STRING *uis);

static int open_console(UI *ui);

static int echo_console(UI *ui);

static int noecho_console(UI *ui);

static int close_console(UI *ui);

#ifndef EMULATOR

static UI_METHOD ui_openssl =

	{

	"OpenSSL default user interface",

	open_console,

	write_string,

	NULL,			/* No flusher is needed for command lines */

	read_string,

	close_console,

	NULL

	};

#else

GET_STATIC_VAR_FROM_TLS(ui_openssl,ui_openssl,UI_METHOD)

#define ui_openssl (*GET_WSD_VAR_NAME(ui_openssl,ui_openssl, s)())

const UI_METHOD temp_s_ui_openssl =

	{

	"OpenSSL default user interface",

	open_console,

	write_string,

	NULL,			/* No flusher is needed for command lines */

	read_string,

	close_console,

	NULL

	};

#endif

/* The method with all the built-in thingies */

EXPORT_C UI_METHOD *UI_OpenSSL(void)

	{

	return &ui_openssl;

	}

/* The following function makes sure that info and error strings are printed

   before any prompt. */

static int write_string(UI *ui, UI_STRING *uis)

	{

	switch (UI_get_string_type(uis))

		{

	case UIT_ERROR:

	case UIT_INFO:

		fputs(UI_get0_output_string(uis), tty_out);

		fflush(tty_out);

		break;

	default:

		break;

		}

	return 1;

	}

static int read_string(UI *ui, UI_STRING *uis)

	{

	int ok = 0;

	switch (UI_get_string_type(uis))

		{

	case UIT_BOOLEAN:

		fputs(UI_get0_output_string(uis), tty_out);

		fputs(UI_get0_action_string(uis), tty_out);

		fflush(tty_out);

		return read_string_inner(ui, uis,

			UI_get_input_flags(uis) & UI_INPUT_FLAG_ECHO, 0);

	case UIT_PROMPT:

		fputs(UI_get0_output_string(uis), tty_out);

		fflush(tty_out);

		return read_string_inner(ui, uis,

			UI_get_input_flags(uis) & UI_INPUT_FLAG_ECHO, 1);

	case UIT_VERIFY:

		fprintf(tty_out,"Verifying - %s",

			UI_get0_output_string(uis));

		fflush(tty_out);

		if ((ok = read_string_inner(ui, uis,

			UI_get_input_flags(uis) & UI_INPUT_FLAG_ECHO, 1)) <= 0)

			return ok;

		if (strcmp(UI_get0_result_string(uis),

			UI_get0_test_string(uis)) != 0)

			{

			fprintf(tty_out,"Verify failure\n");

			fflush(tty_out);

			return 0;

			}

		break;

	default:

		break;

		}

	return 1;

	}

#ifndef SYMBIAN

#if !defined(OPENSSL_SYS_WIN16) && !defined(OPENSSL_SYS_WINCE)

/* Internal functions to read a string without echoing */

static void read_till_nl(FILE *in)

	{

#define SIZE 4

	char buf[SIZE+1];

	do	{

		fgets(buf,SIZE,in);

		} while (strchr(buf,'\n') == NULL);

	}

static volatile sig_atomic_t intr_signal;

#endif

#endif

static int read_string_inner(UI *ui, UI_STRING *uis, int echo, int strip_nl)

	{

	static int ps;

	int ok;

	char result[BUFSIZ];

	int maxsize = BUFSIZ-1;

#ifndef SYMBIAN	

#if !defined(OPENSSL_SYS_WIN16) && !defined(OPENSSL_SYS_WINCE)

	char *p;

	intr_signal=0;

	ok=0;

	ps=0;

	pushsig();

	ps=1;

	if (!echo && !noecho_console(ui))

		goto error;

	ps=2;

	result[0]='\0';

#ifdef OPENSSL_SYS_MSDOS

	if (!echo)

		{

		noecho_fgets(result,maxsize,tty_in);

		p=result; /* FIXME: noecho_fgets doesn't return errors */

		}

	else

		p=fgets(result,maxsize,tty_in);

#else

	p=fgets(result,maxsize,tty_in);

#endif

	if(!p)

		goto error;

	if (feof(tty_in)) goto error;

	if (ferror(tty_in)) goto error;

	if ((p=(char *)strchr(result,'\n')) != NULL)

		{

		if (strip_nl)

			*p='\0';

		}

	else

		read_till_nl(tty_in);

	if (UI_set_result(ui, uis, result) >= 0)

		ok=1;

error:

	if (intr_signal == SIGINT)

		ok=-1;

	if (!echo) fprintf(tty_out,"\n");

	if (ps >= 2 && !echo && !echo_console(ui))

		ok=0;

	if (ps >= 1)

		popsig();

#else

	ok=1;

#endif

#endif

	OPENSSL_cleanse(result,BUFSIZ);

	return ok;

	}

/* Internal functions to open, handle and close a channel to the console.  */

static int open_console(UI *ui)

	{

	CRYPTO_w_lock(CRYPTO_LOCK_UI);

	is_a_tty = 1;

#if defined(OPENSSL_SYS_MACINTOSH_CLASSIC) || defined(OPENSSL_SYS_VXWORKS) || defined(OPENSSL_SYS_NETWARE)

	tty_in=stdin;

	tty_out=stderr;

#else

#  ifdef OPENSSL_SYS_MSDOS