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openssl/crypto/ui/ui_openssl.c

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/*
* Copyright 2001-2022 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the Apache License 2.0 (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 "internal/e_os.h"
#include <openssl/e_os2.h>
#include <openssl/err.h>
#include <openssl/ui.h>
#ifndef OPENSSL_NO_UI_CONSOLE
/*
* 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)
# include <unistd.h>
/*
* If unistd.h defines _POSIX_VERSION, we conclude that we are on a POSIX
* system and have sigaction and termios.
*/
# if defined(_POSIX_VERSION) && _POSIX_VERSION>=199309L
# define SIGACTION
# if !defined(TERMIOS) && !defined(TERMIO) && !defined(SGTTY)
# define TERMIOS
# endif
# endif
# endif
# include "ui_local.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 its 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
# 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(OPENSSL_SYS_TANDEM) && defined(_SPT_MODEL_))
# 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);
/*
* 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;
case UIT_NONE:
case UIT_PROMPT:
case UIT_VERIFY:
case UIT_BOOLEAN:
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;
case UIT_NONE:
case UIT_INFO:
case UIT_ERROR:
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 = 2;
result[0] = '\0';
# if defined(_WIN32)
if (is_a_tty) {
DWORD numread;
# if defined(CP_UTF8)
if (GetEnvironmentVariableW(L"OPENSSL_WIN32_UTF8", NULL, 0) != 0) {
WCHAR wresult[BUFSIZ];
if (ReadConsoleW(GetStdHandle(STD_INPUT_HANDLE),
wresult, maxsize, &numread, NULL)) {
if (numread >= 2 &&
wresult[numread-2] == L'\r' &&
wresult[numread-1] == L'\n') {
wresult[numread-2] = L'\n';
numread--;
}
wresult[numread] = '\0';
if (WideCharToMultiByte(CP_UTF8, 0, wresult, -1,
result, sizeof(result), NULL, 0) > 0)
p = result;
OPENSSL_cleanse(wresult, sizeof(wresult));
}
} else
# endif
if (ReadConsoleA(GetStdHandle(STD_INPUT_HANDLE),
result, maxsize, &numread, NULL)) {
if (numread >= 2 &&
result[numread-2] == '\r' && result[numread-1] == '\n') {
result[numread-2] = '\n';
numread--;
}
result[numread] = '\0';
p = result;
}
} else
# elif defined(OPENSSL_SYS_MSDOS)
if (!echo) {
noecho_fgets(result, maxsize, tty_in);
p = result; /* FIXME: noecho_fgets doesn't return errors */
} else
# endif
p = fgets(result, maxsize, tty_in);
if (p == NULL)
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 if (!read_till_nl(tty_in))
goto error;
if (UI_set_result(ui, uis, result) >= 0)
ok = 1;
error:
if (intr_signal == SIGINT)
ok = -1;
if (echo_eol)
fprintf(tty_out, "\n");
if (ps >= 2 && !echo && !echo_console(ui))
ok = 0;
if (ps >= 1)
popsig();
# else
ok = 1;
# 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)
{
if (!CRYPTO_THREAD_write_lock(ui->lock))
return 0;
is_a_tty = 1;
# if defined(OPENSSL_SYS_VXWORKS)
tty_in = stdin;
tty_out = stderr;
# elif defined(_WIN32) && !defined(_WIN32_WCE)
if ((tty_out = fopen("conout$", "w")) == NULL)
tty_out = stderr;
if (GetConsoleMode(GetStdHandle(STD_INPUT_HANDLE), &tty_orig)) {
tty_in = stdin;
} else {
is_a_tty = 0;
if ((tty_in = fopen("conin$", "r")) == NULL)
tty_in = stdin;
}
# else
# ifdef OPENSSL_SYS_MSDOS
# define DEV_TTY "con"
# else
# define DEV_TTY "/dev/tty"
# endif
if ((tty_in = fopen(DEV_TTY, "r")) == NULL)
tty_in = stdin;
if ((tty_out = fopen(DEV_TTY, "w")) == NULL)
tty_out = stderr;
# endif
# if defined(TTY_get) && !defined(OPENSSL_SYS_VMS)
if (TTY_get(fileno(tty_in), &tty_orig) == -1) {
# ifdef ENOTTY
if (errno == ENOTTY)
is_a_tty = 0;
else
# endif
# ifdef EINVAL
/*
* Ariel Glenn reports that solaris can return EINVAL instead.
* This should be ok
*/
if (errno == EINVAL)
is_a_tty = 0;
else
# endif
# ifdef ENXIO
/*
* Solaris can return ENXIO.
* This should be ok
*/
if (errno == ENXIO)
is_a_tty = 0;
else
# endif
# ifdef EIO
/*
* Linux can return EIO.
* This should be ok
*/
if (errno == EIO)
is_a_tty = 0;
else
# endif
# ifdef EPERM
/*
* Linux can return EPERM (Operation not permitted),
* e.g. if a daemon executes openssl via fork()+execve()
* This should be ok
*/
if (errno == EPERM)
is_a_tty = 0;
else
# endif
# ifdef ENODEV
/*
* MacOS X returns ENODEV (Operation not supported by device),
* which seems appropriate.
*/
if (errno == ENODEV)
is_a_tty = 0;
else
# endif
{
ERR_raise_data(ERR_LIB_UI, UI_R_UNKNOWN_TTYGET_ERRNO_VALUE,
"errno=%d", errno);
return 0;
}
}
# endif
# ifdef OPENSSL_SYS_VMS
status = sys$assign(&terminal, &channel, 0, 0);
/* if there isn't a TT device, something is very wrong */
if (status != SS$_NORMAL) {
ERR_raise_data(ERR_LIB_UI, UI_R_SYSASSIGN_ERROR,
"status=%%X%08X", status);
return 0;
}
status = sys$qiow(0, channel, IO$_SENSEMODE, &iosb, 0, 0, tty_orig, 12,
0, 0, 0, 0);
/* If IO$_SENSEMODE doesn't work, this is not a terminal device */
if ((status != SS$_NORMAL) || (iosb.iosb$w_value != SS$_NORMAL))
is_a_tty = 0;
# endif
return 1;
}
static int noecho_console(UI *ui)
{
# ifdef TTY_FLAGS
memcpy(&(tty_new), &(tty_orig), sizeof(tty_orig));
tty_new.TTY_FLAGS &= ~ECHO;
# endif
# if defined(TTY_set) && !defined(OPENSSL_SYS_VMS)
if (is_a_tty && (TTY_set(fileno(tty_in), &tty_new) == -1))
return 0;
# endif
# ifdef OPENSSL_SYS_VMS
if (is_a_tty) {
tty_new[0] = tty_orig[0];
tty_new[1] = tty_orig[1] | TT$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$_NORMAL)) {
ERR_raise_data(ERR_LIB_UI, UI_R_SYSQIOW_ERROR,
"status=%%X%08X, iosb.iosb$w_value=%%X%08X",
status, iosb.iosb$w_value);
return 0;
}
}
# endif
# if defined(_WIN32) && !defined(_WIN32_WCE)
if (is_a_tty) {
tty_new = tty_orig;
tty_new &= ~ENABLE_ECHO_INPUT;
SetConsoleMode(GetStdHandle(STD_INPUT_HANDLE), tty_new);
}
# endif
return 1;
}
static int echo_console(UI *ui)
{
# if defined(TTY_set) && !defined(OPENSSL_SYS_VMS)
memcpy(&(tty_new), &(tty_orig), sizeof(tty_orig));
if (is_a_tty && (TTY_set(fileno(tty_in), &tty_new) == -1))
return 0;
# endif
# ifdef OPENSSL_SYS_VMS
if (is_a_tty) {
tty_new[0] = tty_orig[0];
tty_new[1] = tty_orig[1];
tty_new[2] = tty_orig[2];
status = sys$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)) {
ERR_raise_data(ERR_LIB_UI, UI_R_SYSQIOW_ERROR,
"status=%%X%08X, iosb.iosb$w_value=%%X%08X",
status, iosb.iosb$w_value);
return 0;
}
}
# endif
# if defined(_WIN32) && !defined(_WIN32_WCE)
if (is_a_tty) {
tty_new = tty_orig;
SetConsoleMode(GetStdHandle(STD_INPUT_HANDLE), tty_new);
}
# endif
return 1;
}
static int close_console(UI *ui)
{
int ret = 1;
if (tty_in != stdin)
fclose(tty_in);
if (tty_out != stderr)
fclose(tty_out);
# ifdef OPENSSL_SYS_VMS
status = sys$dassgn(channel);
if (status != SS$_NORMAL) {
ERR_raise_data(ERR_LIB_UI, UI_R_SYSDASSGN_ERROR,
"status=%%X%08X", status);
ret = 0;
}
# endif
CRYPTO_THREAD_unlock(ui->lock);
return ret;
}
# if !defined(OPENSSL_SYS_WINCE)
/* Internal functions to handle signals and act on them */
static void pushsig(void)
{
# ifndef OPENSSL_SYS_WIN32
int i;
# endif
# ifdef SIGACTION
struct sigaction sa;
memset(&sa, 0, sizeof(sa));
sa.sa_handler = recsig;
# endif
# ifdef OPENSSL_SYS_WIN32
savsig[SIGABRT] = signal(SIGABRT, recsig);
savsig[SIGFPE] = signal(SIGFPE, recsig);
savsig[SIGILL] = signal(SIGILL, recsig);
savsig[SIGINT] = signal(SIGINT, recsig);
savsig[SIGSEGV] = signal(SIGSEGV, recsig);
savsig[SIGTERM] = signal(SIGTERM, recsig);
# else
for (i = 1; i < NX509_SIG; i++) {
# ifdef SIGUSR1
if (i == SIGUSR1)
continue;
# endif
# ifdef SIGUSR2
if (i == SIGUSR2)
continue;
# endif
# ifdef SIGKILL
if (i == SIGKILL) /* We can't make any action on that. */
continue;
# endif
# ifdef SIGACTION
sigaction(i, &sa, &savsig[i]);
# else
savsig[i] = signal(i, recsig);
# endif
}
# endif
# ifdef SIGWINCH
signal(SIGWINCH, SIG_DFL);
# endif
}
static void popsig(void)
{
# ifdef OPENSSL_SYS_WIN32
signal(SIGABRT, savsig[SIGABRT]);
signal(SIGFPE, savsig[SIGFPE]);
signal(SIGILL, savsig[SIGILL]);
signal(SIGINT, savsig[SIGINT]);
signal(SIGSEGV, savsig[SIGSEGV]);
signal(SIGTERM, savsig[SIGTERM]);
# else
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
}
# endif
}
static void recsig(int i)
{
intr_signal = i;
}
# endif
/* Internal functions specific for Windows */
# if defined(OPENSSL_SYS_MSDOS) && !defined(_WIN32)
static int noecho_fgets(char *buf, int size, FILE *tty)
{
int i;
char *p;
p = buf;
for (;;) {
if (size == 0) {
*p = '\0';
break;
}
size--;
# if defined(_WIN32)
i = _getch();
# 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
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 console thingies */
UI_METHOD *UI_OpenSSL(void)
{
return &ui_openssl;
}
static const UI_METHOD *default_UI_meth = &ui_openssl;
#else
static const UI_METHOD *default_UI_meth = NULL;
#endif
void UI_set_default_method(const UI_METHOD *meth)
{
default_UI_meth = meth;
}
const UI_METHOD *UI_get_default_method(void)
{
return default_UI_meth;
}
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