/* 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 */
