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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	lib/libc/gen/readpassphrase.c	Lines:	0	83	0.0 %
Date:	2017-11-13	Branches:	0	60	0.0 %


/*	$OpenBSD: readpassphrase.c,v 1.26 2016/10/18 12:47:18 millert Exp $	*/

/*
 * Copyright (c) 2000-2002, 2007, 2010
 *	Todd C. Miller <Todd.Miller@courtesan.com>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 *
 * Sponsored in part by the Defense Advanced Research Projects
 * Agency (DARPA) and Air Force Research Laboratory, Air Force
 * Materiel Command, USAF, under agreement number F39502-99-1-0512.
 */

#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <paths.h>
#include <pwd.h>
#include <signal.h>
#include <string.h>
#include <termios.h>
#include <unistd.h>
#include <readpassphrase.h>

static volatile sig_atomic_t signo[_NSIG];

static void handler(int);

char *
readpassphrase(const char *prompt, char *buf, size_t bufsiz, int flags)
{
	ssize_t nr;
	int input, output, save_errno, i, need_restart;
	char ch, *p, *end;
	struct termios term, oterm;
	struct sigaction sa, savealrm, saveint, savehup, savequit, saveterm;
	struct sigaction savetstp, savettin, savettou, savepipe;

	/* I suppose we could alloc on demand in this case (XXX). */
	if (bufsiz == 0) {
		errno = EINVAL;
		return(NULL);
	}

restart:
	for (i = 0; i < _NSIG; i++)
		signo[i] = 0;
	nr = -1;
	save_errno = 0;
	need_restart = 0;
	/*
	 * Read and write to /dev/tty if available.  If not, read from
	 * stdin and write to stderr unless a tty is required.
	 */
	if ((flags & RPP_STDIN) ||
	    (input = output = open(_PATH_TTY, O_RDWR)) == -1) {
		if (flags & RPP_REQUIRE_TTY) {
			errno = ENOTTY;
			return(NULL);
		}
		input = STDIN_FILENO;
		output = STDERR_FILENO;
	}

	/*
	 * Turn off echo if possible.
	 * If we are using a tty but are not the foreground pgrp this will
	 * generate SIGTTOU, so do it *before* installing the signal handlers.
	 */
	if (input != STDIN_FILENO && tcgetattr(input, &oterm) == 0) {
		memcpy(&term, &oterm, sizeof(term));
		if (!(flags & RPP_ECHO_ON))
			term.c_lflag &= ~(ECHO | ECHONL);
		if (term.c_cc[VSTATUS] != _POSIX_VDISABLE)
			term.c_cc[VSTATUS] = _POSIX_VDISABLE;
		(void)tcsetattr(input, TCSAFLUSH|TCSASOFT, &term);
	} else {
		memset(&term, 0, sizeof(term));
		term.c_lflag |= ECHO;
		memset(&oterm, 0, sizeof(oterm));
		oterm.c_lflag |= ECHO;
	}

	/*
	 * Catch signals that would otherwise cause the user to end
	 * up with echo turned off in the shell.  Don't worry about
	 * things like SIGXCPU and SIGVTALRM for now.
	 */
	sigemptyset(&sa.sa_mask);
	sa.sa_flags = 0;		/* don't restart system calls */
	sa.sa_handler = handler;
	(void)sigaction(SIGALRM, &sa, &savealrm);
	(void)sigaction(SIGHUP, &sa, &savehup);
	(void)sigaction(SIGINT, &sa, &saveint);
	(void)sigaction(SIGPIPE, &sa, &savepipe);
	(void)sigaction(SIGQUIT, &sa, &savequit);
	(void)sigaction(SIGTERM, &sa, &saveterm);
	(void)sigaction(SIGTSTP, &sa, &savetstp);
	(void)sigaction(SIGTTIN, &sa, &savettin);
	(void)sigaction(SIGTTOU, &sa, &savettou);

	if (!(flags & RPP_STDIN))
		(void)write(output, prompt, strlen(prompt));
	end = buf + bufsiz - 1;
	p = buf;
	while ((nr = read(input, &ch, 1)) == 1 && ch != '\n' && ch != '\r') {
		if (p < end) {
			if ((flags & RPP_SEVENBIT))
				ch &= 0x7f;
			if (isalpha((unsigned char)ch)) {
				if ((flags & RPP_FORCELOWER))
					ch = (char)tolower((unsigned char)ch);
				if ((flags & RPP_FORCEUPPER))
					ch = (char)toupper((unsigned char)ch);
			}
			*p++ = ch;
		}
	}
	*p = '\0';
	save_errno = errno;
	if (!(term.c_lflag & ECHO))
		(void)write(output, "\n", 1);

	/* Restore old terminal settings and signals. */
	if (memcmp(&term, &oterm, sizeof(term)) != 0) {
		const int sigttou = signo[SIGTTOU];

		/* Ignore SIGTTOU generated when we are not the fg pgrp. */
		while (tcsetattr(input, TCSAFLUSH|TCSASOFT, &oterm) == -1 &&
		    errno == EINTR && !signo[SIGTTOU])
			continue;
		signo[SIGTTOU] = sigttou;
	}
	(void)sigaction(SIGALRM, &savealrm, NULL);
	(void)sigaction(SIGHUP, &savehup, NULL);
	(void)sigaction(SIGINT, &saveint, NULL);
	(void)sigaction(SIGQUIT, &savequit, NULL);
	(void)sigaction(SIGPIPE, &savepipe, NULL);
	(void)sigaction(SIGTERM, &saveterm, NULL);
	(void)sigaction(SIGTSTP, &savetstp, NULL);
	(void)sigaction(SIGTTIN, &savettin, NULL);
	(void)sigaction(SIGTTOU, &savettou, NULL);
	if (input != STDIN_FILENO)
		(void)close(input);

	/*
	 * If we were interrupted by a signal, resend it to ourselves
	 * now that we have restored the signal handlers.
	 */
	for (i = 0; i < _NSIG; i++) {
		if (signo[i]) {
			kill(getpid(), i);
			switch (i) {
			case SIGTSTP:
			case SIGTTIN:
			case SIGTTOU:
				need_restart = 1;
			}
		}
	}
	if (need_restart)
		goto restart;

	if (save_errno)
		errno = save_errno;
	return(nr == -1 ? NULL : buf);
}
DEF_WEAK(readpassphrase);

char *
getpass(const char *prompt)
{
	static char buf[_PASSWORD_LEN + 1];

	return(readpassphrase(prompt, buf, sizeof(buf), RPP_ECHO_OFF));
}

static void handler(int s)
{

	signo[s] = 1;
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: readpassphrase.c,v 1.26 2016/10/18 12:47:18 millert Exp $ */
2
3			/*
4			* Copyright (c) 2000-2002, 2007, 2010
5			* Todd C. Miller <Todd.Miller@courtesan.com>
6			*
7			* Permission to use, copy, modify, and distribute this software for any
8			* purpose with or without fee is hereby granted, provided that the above
9			* copyright notice and this permission notice appear in all copies.
10			*
11			* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
12			* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
13			* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
14			* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
15			* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
16			* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
17			* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
18			*
19			* Sponsored in part by the Defense Advanced Research Projects
20			* Agency (DARPA) and Air Force Research Laboratory, Air Force
21			* Materiel Command, USAF, under agreement number F39502-99-1-0512.
22			*/
23
24			#include <ctype.h>
25			#include <errno.h>
26			#include <fcntl.h>
27			#include <paths.h>
28			#include <pwd.h>
29			#include <signal.h>
30			#include <string.h>
31			#include <termios.h>
32			#include <unistd.h>
33			#include <readpassphrase.h>
34
35			static volatile sig_atomic_t signo[_NSIG];
36
37			static void handler(int);
38
39			char *
40			readpassphrase(const char prompt, char buf, size_t bufsiz, int flags)
41			{
42			ssize_t nr;
43			int input, output, save_errno, i, need_restart;
44			char ch, p, end;
45			struct termios term, oterm;
46			struct sigaction sa, savealrm, saveint, savehup, savequit, saveterm;
47			struct sigaction savetstp, savettin, savettou, savepipe;
48
49			/* I suppose we could alloc on demand in this case (XXX). */
50			if (bufsiz == 0) {
51			errno = EINVAL;
52			return(NULL);
53			}
54
55			restart:
56			for (i = 0; i < _NSIG; i++)
57			signo[i] = 0;
58			nr = -1;
59			save_errno = 0;
60			need_restart = 0;
61			/*
62			* Read and write to /dev/tty if available. If not, read from
63			* stdin and write to stderr unless a tty is required.
64			*/
65			if ((flags & RPP_STDIN) \|\|
66			(input = output = open(_PATH_TTY, O_RDWR)) == -1) {
67			if (flags & RPP_REQUIRE_TTY) {
68			errno = ENOTTY;
69			return(NULL);
70			}
71			input = STDIN_FILENO;
72			output = STDERR_FILENO;
73			}
74
75			/*
76			* Turn off echo if possible.
77			* If we are using a tty but are not the foreground pgrp this will
78			* generate SIGTTOU, so do it before installing the signal handlers.
79			*/
80			if (input != STDIN_FILENO && tcgetattr(input, &oterm) == 0) {
81			memcpy(&term, &oterm, sizeof(term));
82			if (!(flags & RPP_ECHO_ON))
83			term.c_lflag &= ~(ECHO \| ECHONL);
84			if (term.c_cc[VSTATUS] != _POSIX_VDISABLE)
85			term.c_cc[VSTATUS] = _POSIX_VDISABLE;
86			(void)tcsetattr(input, TCSAFLUSH\|TCSASOFT, &term);
87			} else {
88			memset(&term, 0, sizeof(term));
89			term.c_lflag \|= ECHO;
90			memset(&oterm, 0, sizeof(oterm));
91			oterm.c_lflag \|= ECHO;
92			}
93
94			/*
95			* Catch signals that would otherwise cause the user to end
96			* up with echo turned off in the shell. Don't worry about
97			* things like SIGXCPU and SIGVTALRM for now.
98			*/
99			sigemptyset(&sa.sa_mask);
100			sa.sa_flags = 0; /* don't restart system calls */
101			sa.sa_handler = handler;
102			(void)sigaction(SIGALRM, &sa, &savealrm);
103			(void)sigaction(SIGHUP, &sa, &savehup);
104			(void)sigaction(SIGINT, &sa, &saveint);
105			(void)sigaction(SIGPIPE, &sa, &savepipe);
106			(void)sigaction(SIGQUIT, &sa, &savequit);
107			(void)sigaction(SIGTERM, &sa, &saveterm);
108			(void)sigaction(SIGTSTP, &sa, &savetstp);
109			(void)sigaction(SIGTTIN, &sa, &savettin);
110			(void)sigaction(SIGTTOU, &sa, &savettou);
111
112			if (!(flags & RPP_STDIN))
113			(void)write(output, prompt, strlen(prompt));
114			end = buf + bufsiz - 1;
115			p = buf;
116			while ((nr = read(input, &ch, 1)) == 1 && ch != '\n' && ch != '\r') {
117			if (p < end) {
118			if ((flags & RPP_SEVENBIT))
119			ch &= 0x7f;
120			if (isalpha((unsigned char)ch)) {
121			if ((flags & RPP_FORCELOWER))
122			ch = (char)tolower((unsigned char)ch);
123			if ((flags & RPP_FORCEUPPER))
124			ch = (char)toupper((unsigned char)ch);
125			}
126			*p++ = ch;
127			}
128			}
129			*p = '\0';
130			save_errno = errno;
131			if (!(term.c_lflag & ECHO))
132			(void)write(output, "\n", 1);
133
134			/* Restore old terminal settings and signals. */
135			if (memcmp(&term, &oterm, sizeof(term)) != 0) {
136			const int sigttou = signo[SIGTTOU];
137
138			/* Ignore SIGTTOU generated when we are not the fg pgrp. */
139			while (tcsetattr(input, TCSAFLUSH\|TCSASOFT, &oterm) == -1 &&
140			errno == EINTR && !signo[SIGTTOU])
141			continue;
142			signo[SIGTTOU] = sigttou;
143			}
144			(void)sigaction(SIGALRM, &savealrm, NULL);
145			(void)sigaction(SIGHUP, &savehup, NULL);
146			(void)sigaction(SIGINT, &saveint, NULL);
147			(void)sigaction(SIGQUIT, &savequit, NULL);
148			(void)sigaction(SIGPIPE, &savepipe, NULL);
149			(void)sigaction(SIGTERM, &saveterm, NULL);
150			(void)sigaction(SIGTSTP, &savetstp, NULL);
151			(void)sigaction(SIGTTIN, &savettin, NULL);
152			(void)sigaction(SIGTTOU, &savettou, NULL);
153			if (input != STDIN_FILENO)
154			(void)close(input);
155
156			/*
157			* If we were interrupted by a signal, resend it to ourselves
158			* now that we have restored the signal handlers.
159			*/
160			for (i = 0; i < _NSIG; i++) {
161			if (signo[i]) {
162			kill(getpid(), i);
163			switch (i) {
164			case SIGTSTP:
165			case SIGTTIN:
166			case SIGTTOU:
167			need_restart = 1;
168			}
169			}
170			}
171			if (need_restart)
172			goto restart;
173
174			if (save_errno)
175			errno = save_errno;
176			return(nr == -1 ? NULL : buf);
177			}
178			DEF_WEAK(readpassphrase);
179
180			char *
181			getpass(const char *prompt)
182			{
183			static char buf[_PASSWORD_LEN + 1];
184
185			return(readpassphrase(prompt, buf, sizeof(buf), RPP_ECHO_OFF));
186			}
187
188			static void handler(int s)
189			{
190
191			signo[s] = 1;
192			}