GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: lib/libcrypto/ui/ui_openssl.c Lines: 0 99 0.0 %
Date: 2017-11-13 Branches: 0 82 0.0 %

Line Branch Exec Source
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/* $OpenBSD: ui_openssl.c,v 1.25 2015/09/10 15:56:26 jsing Exp $ */
2
/* Written by Richard Levitte (richard@levitte.org) and others
3
 * for the OpenSSL project 2001.
4
 */
5
/* ====================================================================
6
 * Copyright (c) 2001 The OpenSSL Project.  All rights reserved.
7
 *
8
 * Redistribution and use in source and binary forms, with or without
9
 * modification, are permitted provided that the following conditions
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 * are met:
11
 *
12
 * 1. Redistributions of source code must retain the above copyright
13
 *    notice, this list of conditions and the following disclaimer.
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 *
15
 * 2. Redistributions in binary form must reproduce the above copyright
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 *    notice, this list of conditions and the following disclaimer in
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 *    the documentation and/or other materials provided with the
18
 *    distribution.
19
 *
20
 * 3. All advertising materials mentioning features or use of this
21
 *    software must display the following acknowledgment:
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 *    "This product includes software developed by the OpenSSL Project
23
 *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
24
 *
25
 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
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 *    endorse or promote products derived from this software without
27
 *    prior written permission. For written permission, please contact
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 *    openssl-core@openssl.org.
29
 *
30
 * 5. Products derived from this software may not be called "OpenSSL"
31
 *    nor may "OpenSSL" appear in their names without prior written
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 *    permission of the OpenSSL Project.
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 *
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 * 6. Redistributions of any form whatsoever must retain the following
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 *    acknowledgment:
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 *    "This product includes software developed by the OpenSSL Project
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 *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
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 *
39
 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
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 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
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 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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 * OF THE POSSIBILITY OF SUCH DAMAGE.
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 * ====================================================================
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 *
53
 * This product includes cryptographic software written by Eric Young
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 * (eay@cryptsoft.com).  This product includes software written by Tim
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 * Hudson (tjh@cryptsoft.com).
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 *
57
 */
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59
/* The lowest level part of this file was previously in crypto/des/read_pwd.c,
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 * Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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 * All rights reserved.
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 *
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 * This package is an SSL implementation written
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 * by Eric Young (eay@cryptsoft.com).
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 * The implementation was written so as to conform with Netscapes SSL.
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 *
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 * This library is free for commercial and non-commercial use as long as
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 * the following conditions are aheared to.  The following conditions
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 * apply to all code found in this distribution, be it the RC4, RSA,
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 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
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 * included with this distribution is covered by the same copyright terms
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 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
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 *
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 * Copyright remains Eric Young's, and as such any Copyright notices in
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 * the code are not to be removed.
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 * If this package is used in a product, Eric Young should be given attribution
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 * as the author of the parts of the library used.
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 * This can be in the form of a textual message at program startup or
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 * in documentation (online or textual) provided with the package.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 * 1. Redistributions of source code must retain the copyright
85
 *    notice, this list of conditions and the following disclaimer.
86
 * 2. Redistributions in binary form must reproduce the above copyright
87
 *    notice, this list of conditions and the following disclaimer in the
88
 *    documentation and/or other materials provided with the distribution.
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 * 3. All advertising materials mentioning features or use of this software
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 *    must display the following acknowledgement:
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 *    "This product includes cryptographic software written by
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 *     Eric Young (eay@cryptsoft.com)"
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 *    The word 'cryptographic' can be left out if the rouines from the library
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 *    being used are not cryptographic related :-).
95
 * 4. If you include any Windows specific code (or a derivative thereof) from
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 *    the apps directory (application code) you must include an acknowledgement:
97
 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
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 *
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 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
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 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
105
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
107
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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 * SUCH DAMAGE.
110
 *
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 * The licence and distribution terms for any publically available version or
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 * derivative of this code cannot be changed.  i.e. this code cannot simply be
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 * copied and put under another distribution licence
114
 * [including the GNU Public Licence.]
115
 */
116
117
#include <sys/ioctl.h>
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119
#include <openssl/opensslconf.h>
120
121
#include <errno.h>
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#include <signal.h>
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#include <stdio.h>
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#include <string.h>
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#include <termios.h>
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#include <unistd.h>
127
128
#include "ui_locl.h"
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130
#ifndef NX509_SIG
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#define NX509_SIG 32
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#endif
133
134
/* Define globals.  They are protected by a lock */
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static struct sigaction savsig[NX509_SIG];
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137
static struct termios tty_orig;
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static FILE *tty_in, *tty_out;
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static int is_a_tty;
140
141
/* Declare static functions */
142
static int read_till_nl(FILE *);
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static void recsig(int);
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static void pushsig(void);
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static void popsig(void);
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static int read_string_inner(UI *ui, UI_STRING *uis, int echo, int strip_nl);
147
148
static int read_string(UI *ui, UI_STRING *uis);
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static int write_string(UI *ui, UI_STRING *uis);
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151
static int open_console(UI *ui);
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static int echo_console(UI *ui);
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static int noecho_console(UI *ui);
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static int close_console(UI *ui);
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156
static UI_METHOD ui_openssl = {
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	.name = "OpenSSL default user interface",
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	.ui_open_session = open_console,
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	.ui_write_string = write_string,
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	.ui_read_string = read_string,
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	.ui_close_session = close_console,
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};
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164
/* The method with all the built-in thingies */
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UI_METHOD *
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UI_OpenSSL(void)
167
{
168
	return &ui_openssl;
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}
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171
/* The following function makes sure that info and error strings are printed
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   before any prompt. */
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static int
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write_string(UI *ui, UI_STRING *uis)
175
{
176
	switch (UI_get_string_type(uis)) {
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	case UIT_ERROR:
178
	case UIT_INFO:
179
		fputs(UI_get0_output_string(uis), tty_out);
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		fflush(tty_out);
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		break;
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	default:
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		break;
184
	}
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	return 1;
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}
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188
static int
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read_string(UI *ui, UI_STRING *uis)
190
{
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	int ok = 0;
192
193
	switch (UI_get_string_type(uis)) {
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	case UIT_BOOLEAN:
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		fputs(UI_get0_output_string(uis), tty_out);
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		fputs(UI_get0_action_string(uis), tty_out);
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		fflush(tty_out);
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		return read_string_inner(ui, uis,
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		    UI_get_input_flags(uis) & UI_INPUT_FLAG_ECHO, 0);
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	case UIT_PROMPT:
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		fputs(UI_get0_output_string(uis), tty_out);
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		fflush(tty_out);
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		return read_string_inner(ui, uis,
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		    UI_get_input_flags(uis) & UI_INPUT_FLAG_ECHO, 1);
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	case UIT_VERIFY:
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		fprintf(tty_out, "Verifying - %s",
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		    UI_get0_output_string(uis));
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		fflush(tty_out);
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		if ((ok = read_string_inner(ui, uis, UI_get_input_flags(uis) &
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		    UI_INPUT_FLAG_ECHO, 1)) <= 0)
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			return ok;
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		if (strcmp(UI_get0_result_string(uis),
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		    UI_get0_test_string(uis)) != 0) {
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			fprintf(tty_out, "Verify failure\n");
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			fflush(tty_out);
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			return 0;
217
		}
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		break;
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	default:
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		break;
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	}
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	return 1;
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}
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225
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/* Internal functions to read a string without echoing */
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static int
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read_till_nl(FILE *in)
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{
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#define SIZE 4
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	char buf[SIZE + 1];
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	do {
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		if (!fgets(buf, SIZE, in))
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			return 0;
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	} while (strchr(buf, '\n') == NULL);
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	return 1;
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}
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static volatile sig_atomic_t intr_signal;
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242
static int
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read_string_inner(UI *ui, UI_STRING *uis, int echo, int strip_nl)
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{
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	static int ps;
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	int ok;
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	char result[BUFSIZ];
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	int maxsize = BUFSIZ - 1;
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	char *p;
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251
	intr_signal = 0;
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	ok = 0;
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	ps = 0;
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255
	pushsig();
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	ps = 1;
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258
	if (!echo && !noecho_console(ui))
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		goto error;
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	ps = 2;
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	result[0] = '\0';
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	p = fgets(result, maxsize, tty_in);
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	if (!p)
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		goto error;
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	if (feof(tty_in))
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		goto error;
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	if (ferror(tty_in))
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		goto error;
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	if ((p = strchr(result, '\n')) != NULL) {
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		if (strip_nl)
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			*p = '\0';
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	} else if (!read_till_nl(tty_in))
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		goto error;
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	if (UI_set_result(ui, uis, result) >= 0)
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		ok = 1;
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278
error:
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	if (intr_signal == SIGINT)
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		ok = -1;
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	if (!echo)
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		fprintf(tty_out, "\n");
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	if (ps >= 2 && !echo && !echo_console(ui))
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		ok = 0;
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286
	if (ps >= 1)
287
		popsig();
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289
	explicit_bzero(result, BUFSIZ);
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	return ok;
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}
292
293
294
/* Internal functions to open, handle and close a channel to the console.  */
295
static int
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open_console(UI *ui)
297
{
298
	CRYPTO_w_lock(CRYPTO_LOCK_UI);
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	is_a_tty = 1;
300
301
#define DEV_TTY "/dev/tty"
302
	if ((tty_in = fopen(DEV_TTY, "r")) == NULL)
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		tty_in = stdin;
304
	if ((tty_out = fopen(DEV_TTY, "w")) == NULL)
305
		tty_out = stderr;
306
307
	if (tcgetattr(fileno(tty_in), &tty_orig) == -1) {
308
		if (errno == ENOTTY)
309
			is_a_tty = 0;
310
		else
311
			/*
312
			 * Ariel Glenn ariel@columbia.edu reports that
313
			 * solaris can return EINVAL instead.  This should be
314
			 * ok
315
			 */
316
			if (errno == EINVAL)
317
				is_a_tty = 0;
318
		else
319
			return 0;
320
	}
321
322
	return 1;
323
}
324
325
static int
326
noecho_console(UI *ui)
327
{
328
	struct termios tty_new = tty_orig;
329
330
	tty_new.c_lflag &= ~ECHO;
331
	if (is_a_tty && (tcsetattr(fileno(tty_in), TCSANOW, &tty_new) == -1))
332
		return 0;
333
	return 1;
334
}
335
336
static int
337
echo_console(UI *ui)
338
{
339
	if (is_a_tty && (tcsetattr(fileno(tty_in), TCSANOW, &tty_orig) == -1))
340
		return 0;
341
	return 1;
342
}
343
344
static int
345
close_console(UI *ui)
346
{
347
	if (tty_in != stdin)
348
		fclose(tty_in);
349
	if (tty_out != stderr)
350
		fclose(tty_out);
351
	CRYPTO_w_unlock(CRYPTO_LOCK_UI);
352
353
	return 1;
354
}
355
356
357
/* Internal functions to handle signals and act on them */
358
static void
359
pushsig(void)
360
{
361
	int i;
362
	struct sigaction sa;
363
364
	memset(&sa, 0, sizeof sa);
365
	sa.sa_handler = recsig;
366
367
	for (i = 1; i < NX509_SIG; i++) {
368
		if (i == SIGUSR1)
369
			continue;
370
		if (i == SIGUSR2)
371
			continue;
372
		if (i == SIGKILL)	/* We can't make any action on that. */
373
			continue;
374
		sigaction(i, &sa, &savsig[i]);
375
	}
376
377
	signal(SIGWINCH, SIG_DFL);
378
}
379
380
static void
381
popsig(void)
382
{
383
	int i;
384
	for (i = 1; i < NX509_SIG; i++) {
385
		if (i == SIGUSR1)
386
			continue;
387
		if (i == SIGUSR2)
388
			continue;
389
		sigaction(i, &savsig[i], NULL);
390
	}
391
}
392
393
static void
394
recsig(int i)
395
{
396
	intr_signal = i;
397
}