Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	lib/libcrypto/ui/ui_openssl.c	Lines:	0	101	0.0 %
Date:	2017-11-07	Branches:	0	82	0.0 %


/* $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;
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $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
10			* are met:
11			*
12			* 1. Redistributions of source code must retain the above copyright
13			* notice, this list of conditions and the following disclaimer.
14			*
15			* 2. Redistributions in binary form must reproduce the above copyright
16			* notice, this list of conditions and the following disclaimer in
17			* 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:
22			* "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
26			* endorse or promote products derived from this software without
27			* prior written permission. For written permission, please contact
28			* 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
32			* permission of the OpenSSL Project.
33			*
34			* 6. Redistributions of any form whatsoever must retain the following
35			* acknowledgment:
36			* "This product includes software developed by the OpenSSL Project
37			* for use in the OpenSSL Toolkit (http://www.openssl.org/)"
38			*
39			* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
40			* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41			* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42			* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
43			* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44			* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45			* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46			* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47			* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
48			* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49			* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50			* OF THE POSSIBILITY OF SUCH DAMAGE.
51			* ====================================================================
52			*
53			* This product includes cryptographic software written by Eric Young
54			* (eay@cryptsoft.com). This product includes software written by Tim
55			* Hudson (tjh@cryptsoft.com).
56			*
57			*/
58
59			/* The lowest level part of this file was previously in crypto/des/read_pwd.c,
60			* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
61			* All rights reserved.
62			*
63			* This package is an SSL implementation written
64			* by Eric Young (eay@cryptsoft.com).
65			* The implementation was written so as to conform with Netscapes SSL.
66			*
67			* This library is free for commercial and non-commercial use as long as
68			* the following conditions are aheared to. The following conditions
69			* apply to all code found in this distribution, be it the RC4, RSA,
70			* lhash, DES, etc., code; not just the SSL code. The SSL documentation
71			* included with this distribution is covered by the same copyright terms
72			* except that the holder is Tim Hudson (tjh@cryptsoft.com).
73			*
74			* Copyright remains Eric Young's, and as such any Copyright notices in
75			* the code are not to be removed.
76			* If this package is used in a product, Eric Young should be given attribution
77			* as the author of the parts of the library used.
78			* This can be in the form of a textual message at program startup or
79			* in documentation (online or textual) provided with the package.
80			*
81			* Redistribution and use in source and binary forms, with or without
82			* modification, are permitted provided that the following conditions
83			* are met:
84			* 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.
89			* 3. All advertising materials mentioning features or use of this software
90			* must display the following acknowledgement:
91			* "This product includes cryptographic software written by
92			* Eric Young (eay@cryptsoft.com)"
93			* The word 'cryptographic' can be left out if the rouines from the library
94			* being used are not cryptographic related :-).
95			* 4. If you include any Windows specific code (or a derivative thereof) from
96			* the apps directory (application code) you must include an acknowledgement:
97			* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
98			*
99			* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
100			* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
101			* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
102			* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
103			* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
104			* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
105			* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
106			* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
107			* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
108			* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
109			* SUCH DAMAGE.
110			*
111			* The licence and distribution terms for any publically available version or
112			* derivative of this code cannot be changed. i.e. this code cannot simply be
113			* copied and put under another distribution licence
114			* [including the GNU Public Licence.]
115			*/
116
117			#include <sys/ioctl.h>
118
119			#include <openssl/opensslconf.h>
120
121			#include <errno.h>
122			#include <signal.h>
123			#include <stdio.h>
124			#include <string.h>
125			#include <termios.h>
126			#include <unistd.h>
127
128			#include "ui_locl.h"
129
130			#ifndef NX509_SIG
131			#define NX509_SIG 32
132			#endif
133
134			/* Define globals. They are protected by a lock */
135			static struct sigaction savsig[NX509_SIG];
136
137			static struct termios tty_orig;
138			static FILE tty_in, tty_out;
139			static int is_a_tty;
140
141			/* Declare static functions */
142			static int read_till_nl(FILE *);
143			static void recsig(int);
144			static void pushsig(void);
145			static void popsig(void);
146			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);
149			static int write_string(UI ui, UI_STRING uis);
150
151			static int open_console(UI *ui);
152			static int echo_console(UI *ui);
153			static int noecho_console(UI *ui);
154			static int close_console(UI *ui);
155
156			static UI_METHOD ui_openssl = {
157			.name = "OpenSSL default user interface",
158			.ui_open_session = open_console,
159			.ui_write_string = write_string,
160			.ui_read_string = read_string,
161			.ui_close_session = close_console,
162			};
163
164			/* The method with all the built-in thingies */
165			UI_METHOD *
166			UI_OpenSSL(void)
167			{
168			return &ui_openssl;
169			}
170
171			/* The following function makes sure that info and error strings are printed
172			before any prompt. */
173			static int
174			write_string(UI ui, UI_STRING uis)
175			{
176			switch (UI_get_string_type(uis)) {
177			case UIT_ERROR:
178			case UIT_INFO:
179			fputs(UI_get0_output_string(uis), tty_out);
180			fflush(tty_out);
181			break;
182			default:
183			break;
184			}
185			return 1;
186			}
187
188			static int
189			read_string(UI ui, UI_STRING uis)
190			{
191			int ok = 0;
192
193			switch (UI_get_string_type(uis)) {
194			case UIT_BOOLEAN:
195			fputs(UI_get0_output_string(uis), tty_out);
196			fputs(UI_get0_action_string(uis), tty_out);
197			fflush(tty_out);
198			return read_string_inner(ui, uis,
199			UI_get_input_flags(uis) & UI_INPUT_FLAG_ECHO, 0);
200			case UIT_PROMPT:
201			fputs(UI_get0_output_string(uis), tty_out);
202			fflush(tty_out);
203			return read_string_inner(ui, uis,
204			UI_get_input_flags(uis) & UI_INPUT_FLAG_ECHO, 1);
205			case UIT_VERIFY:
206			fprintf(tty_out, "Verifying - %s",
207			UI_get0_output_string(uis));
208			fflush(tty_out);
209			if ((ok = read_string_inner(ui, uis, UI_get_input_flags(uis) &
210			UI_INPUT_FLAG_ECHO, 1)) <= 0)
211			return ok;
212			if (strcmp(UI_get0_result_string(uis),
213			UI_get0_test_string(uis)) != 0) {
214			fprintf(tty_out, "Verify failure\n");
215			fflush(tty_out);
216			return 0;
217			}
218			break;
219			default:
220			break;
221			}
222			return 1;
223			}
224
225
226			/* Internal functions to read a string without echoing */
227			static int
228			read_till_nl(FILE *in)
229			{
230			#define SIZE 4
231			char buf[SIZE + 1];
232
233			do {
234			if (!fgets(buf, SIZE, in))
235			return 0;
236			} while (strchr(buf, '\n') == NULL);
237			return 1;
238			}
239
240			static volatile sig_atomic_t intr_signal;
241
242			static int
243			read_string_inner(UI ui, UI_STRING uis, int echo, int strip_nl)
244			{
245			static int ps;
246			int ok;
247			char result[BUFSIZ];
248			int maxsize = BUFSIZ - 1;
249			char *p;
250
251			intr_signal = 0;
252			ok = 0;
253			ps = 0;
254
255			pushsig();
256			ps = 1;
257
258			if (!echo && !noecho_console(ui))
259			goto error;
260			ps = 2;
261
262			result[0] = '\0';
263			p = fgets(result, maxsize, tty_in);
264			if (!p)
265			goto error;
266			if (feof(tty_in))
267			goto error;
268			if (ferror(tty_in))
269			goto error;
270			if ((p = strchr(result, '\n')) != NULL) {
271			if (strip_nl)
272			*p = '\0';
273			} else if (!read_till_nl(tty_in))
274			goto error;
275			if (UI_set_result(ui, uis, result) >= 0)
276			ok = 1;
277
278			error:
279			if (intr_signal == SIGINT)
280			ok = -1;
281			if (!echo)
282			fprintf(tty_out, "\n");
283			if (ps >= 2 && !echo && !echo_console(ui))
284			ok = 0;
285
286			if (ps >= 1)
287			popsig();
288
289			explicit_bzero(result, BUFSIZ);
290			return ok;
291			}
292
293
294			/* Internal functions to open, handle and close a channel to the console. */
295			static int
296			open_console(UI *ui)
297			{
298			CRYPTO_w_lock(CRYPTO_LOCK_UI);
299			is_a_tty = 1;
300
301			#define DEV_TTY "/dev/tty"
302			if ((tty_in = fopen(DEV_TTY, "r")) == NULL)
303			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			}