path: root/crypto/ui/ui_openssl.c

/*
 * Copyright 2001-2016 The OpenSSL Project Authors. All Rights Reserved.
 *
 * Licensed under the OpenSSL license (the "License").  You may not use
 * this file except in compliance with the License.  You can obtain a copy
 * in the file LICENSE in the source distribution or at
 * https://www.openssl.org/source/license.html
 */

#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.
 */
#if defined(OPENSSL_SYS_VXWORKS)
# include <sys/types.h>
#endif

#if !defined(_POSIX_C_SOURCE) && defined(OPENSSL_SYS_VMS)
# ifndef _POSIX_C_SOURCE
#  define _POSIX_C_SOURCE 2
# endif
#endif
#include <signal.h>
#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)

#  define SIGACTION
#  if !defined(TERMIOS) && !defined(TERMIO) && !defined(SGTTY)
#   define TERMIOS
#  endif

# endif
#endif

/* 06-Apr-92 Luke Brennan    Support for VMS */
#include "ui_locl.h"
#include "internal/cryptlib.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 6 types of terminal interface supported, TERMIO, TERMIOS, VMS,
 * MSDOS, WIN32 Console and SGTTY.
 *
 * If someone defines one of the macros TERMIO, TERMIOS or SGTTY, it will
 * remain respected.  Otherwise, we default to TERMIOS except for a few
 * systems that require something different.
 *
 * Note: we do not use SGTTY unless it's defined by the configuration.  We
 * may eventually opt to remove it's use entirely.
 */

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

# if defined(_LIBC)
#  undef  TERMIOS
#  define TERMIO
#  undef  SGTTY
/*
 * We know that VMS, MSDOS, VXWORKS, use entirely other mechanisms.
 */
# elif !defined(OPENSSL_SYS_VMS) \
	&& !defined(OPENSSL_SYS_MSDOS) \
	&& !defined(OPENSSL_SYS_VXWORKS)
#  define TERMIOS
#  undef  TERMIO
#  undef  SGTTY
# endif

#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)
# 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

#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;
#elif defined(_WIN32) && !defined(_WIN32_WCE)
static DWORD tty_orig, tty_new;
#else
# if !defined(OPENSSL_SYS_MSDOS) || defined(__DJGPP__)
static TTY_STRUCT tty_orig, tty_new;
# endif
#endif
static FILE *tty_in, *tty_out;
static int is_a_tty;

/* Declare static functions */
#if !defined(OPENSSL_SYS_WINCE)
static int read_till_nl(FILE *);
static void recsig(int);
static void pushsig(void);
static void popsig(void);
#endif
#if defined(OPENSSL_SYS_MSDOS) && !defined(_WIN32)
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);

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
};

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

#if !defined(OPENSSL_SYS_WINCE)
/* Internal functions to read a string without echoing */
static int read_till_nl(FILE *in)
{
# define SIZE 4
    char buf[SIZE + 1];

    do {
        if (!fgets(buf, SIZE, in))
            return 0;
    } while (strchr(buf, '\n') == NULL);
    return 1;
}

static volatile sig_atomic_t intr_signal;
#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;
#if !defined(OPENSSL_SYS_WINCE)
    char *p = NULL;
    int echo_eol = !echo;

    intr_signal = 0;
    ok = 0;
    ps = 0;

    pushsig();
    ps = 1;

    if (!echo && !noecho_console(ui))
        goto error;
    ps =