pineapple-src/externals/libressl/crypto/ui/ui_openssl.c

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2020-12-28 15:15:37 +00:00
/* $OpenBSD: ui_openssl.c,v 1.25 2015/09/10 15:56:26 jsing Exp $ */
/* 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.]
*/
#include <sys/ioctl.h>
#include <openssl/opensslconf.h>
#include <errno.h>
#include <signal.h>
#include <stdio.h>
#include <string.h>
#include <termios.h>
#include <unistd.h>
#include "ui_locl.h"
#ifndef NX509_SIG
#define NX509_SIG 32
#endif
/* Define globals. They are protected by a lock */
static struct sigaction savsig[NX509_SIG];
static struct termios tty_orig;
static FILE *tty_in, *tty_out;
static int is_a_tty;
/* Declare static functions */
static int read_till_nl(FILE *);
static void recsig(int);
static void pushsig(void);
static void popsig(void);
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 = {
.name = "OpenSSL default user interface",
.ui_open_session = open_console,
.ui_write_string = write_string,
.ui_read_string = read_string,
.ui_close_session = close_console,
};
/* 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;
}
/* 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;
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;
char *p;
intr_signal = 0;
ok = 0;
ps = 0;
pushsig();
ps = 1;
if (!echo && !noecho_console(ui))
goto error;
ps = 2;
result[0] = '\0';
p = fgets(result, maxsize, tty_in);
if (!p)
goto error;
if (feof(tty_in))
goto error;
if (ferror(tty_in))
goto error;
if ((p = 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)
fprintf(tty_out, "\n");
if (ps >= 2 && !echo && !echo_console(ui))
ok = 0;
if (ps >= 1)
popsig();
explicit_bzero(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;
#define DEV_TTY "/dev/tty"
if ((tty_in = fopen(DEV_TTY, "r")) == NULL)
tty_in = stdin;
if ((tty_out = fopen(DEV_TTY, "w")) == NULL)
tty_out = stderr;
if (tcgetattr(fileno(tty_in), &tty_orig) == -1) {
if (errno == ENOTTY)
is_a_tty = 0;
else
/*
* Ariel Glenn ariel@columbia.edu reports that
* solaris can return EINVAL instead. This should be
* ok
*/
if (errno == EINVAL)
is_a_tty = 0;
else
return 0;
}
return 1;
}
static int
noecho_console(UI *ui)
{
struct termios tty_new = tty_orig;
tty_new.c_lflag &= ~ECHO;
if (is_a_tty && (tcsetattr(fileno(tty_in), TCSANOW, &tty_new) == -1))
return 0;
return 1;
}
static int
echo_console(UI *ui)
{
if (is_a_tty && (tcsetattr(fileno(tty_in), TCSANOW, &tty_orig) == -1))
return 0;
return 1;
}
static int
close_console(UI *ui)
{
if (tty_in != stdin)
fclose(tty_in);
if (tty_out != stderr)
fclose(tty_out);
CRYPTO_w_unlock(CRYPTO_LOCK_UI);
return 1;
}
/* Internal functions to handle signals and act on them */
static void
pushsig(void)
{
int i;
struct sigaction sa;
memset(&sa, 0, sizeof sa);
sa.sa_handler = recsig;
for (i = 1; i < NX509_SIG; i++) {
if (i == SIGUSR1)
continue;
if (i == SIGUSR2)
continue;
if (i == SIGKILL) /* We can't make any action on that. */
continue;
sigaction(i, &sa, &savsig[i]);
}
signal(SIGWINCH, SIG_DFL);
}
static void
popsig(void)
{
int i;
for (i = 1; i < NX509_SIG; i++) {
if (i == SIGUSR1)
continue;
if (i == SIGUSR2)
continue;
sigaction(i, &savsig[i], NULL);
}
}
static void
recsig(int i)
{
intr_signal = i;
}