1/*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2004 Marius Strobl
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
20 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
21 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
22 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
23 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
25 * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28#include <sys/cdefs.h>
29__FBSDID("$FreeBSD$");
30
31/*
32 * Handlers for Open Firmware /options node.
33 */
34
35#include <sys/types.h>
36
37#include <dev/ofw/openfirm.h>
38
39#include <err.h>
40#include <fcntl.h>
41#include <readpassphrase.h>
42#include <stdio.h>
43#include <stdlib.h>
44#include <string.h>
45#include <sysexits.h>
46#include <unistd.h>
47
48#include "ofw_options.h"
49#include "ofw_util.h"
50
51#define	OFWO_LOGO	512
52#define	OFWO_MAXPROP	31
53#define	OFWO_MAXPWD	8
54
55struct ofwo_extabent {
56	const char	*ex_prop;
57	int		(*ex_handler)(const struct ofwo_extabent *, int,
58			    const void *, int, const char *);
59};
60
61static int	ofwo_oemlogo(const struct ofwo_extabent *, int, const void *,
62		    int, const char *);
63static int	ofwo_secmode(const struct ofwo_extabent *, int, const void *,
64		    int, const char *);
65static int	ofwo_secpwd(const struct ofwo_extabent *, int, const void *,
66		    int, const char *);
67
68static const struct ofwo_extabent ofwo_extab[] = {
69	{ "oem-logo",			ofwo_oemlogo },
70	{ "security-mode",		ofwo_secmode },
71	{ "security-password",		ofwo_secpwd },
72	{ NULL,				NULL }
73};
74
75static int	ofwo_setpass(int);
76static int	ofwo_setstr(int, const void *, int, const char *, const char *);
77
78static __inline void
79ofwo_printprop(const char *prop, const char* buf, int buflen)
80{
81
82	printf("%s: %.*s\n", prop, buflen, buf);
83}
84
85static int
86ofwo_oemlogo(const struct ofwo_extabent *exent, int fd, const void *buf,
87    int buflen, const char *val)
88{
89	int lfd;
90	char logo[OFWO_LOGO + 1];
91
92	if (val) {
93		if (val[0] == '\0')
94			ofw_setprop(fd, ofw_optnode(fd), exent->ex_prop, "", 1);
95		else {
96			if ((lfd = open(val, O_RDONLY)) == -1) {
97				warn("could not open '%s'", val);
98				return (EX_USAGE);
99			}
100			if (read(lfd, logo, OFWO_LOGO) != OFWO_LOGO ||
101			    lseek(lfd, 0, SEEK_END) != OFWO_LOGO) {
102				close(lfd);
103				warnx("logo '%s' has wrong size.", val);
104				return (EX_USAGE);
105			}
106			close(lfd);
107			logo[OFWO_LOGO] = '\0';
108			if (ofw_setprop(fd, ofw_optnode(fd), exent->ex_prop,
109			    logo, OFWO_LOGO + 1) != OFWO_LOGO)
110				errx(EX_IOERR, "writing logo failed.");
111		}
112	} else
113		if (buflen != 0)
114			printf("%s: <logo data>\n", exent->ex_prop);
115		else
116			ofwo_printprop(exent->ex_prop, (const char *)buf,
117			    buflen);
118	return (EX_OK);
119}
120
121static int
122ofwo_secmode(const struct ofwo_extabent *exent, int fd, const void *buf,
123    int buflen, const char *val)
124{
125	int res;
126
127	if (val) {
128		if (strcmp(val, "full") == 0 || strcmp(val, "command") == 0) {
129			if ((res = ofwo_setpass(fd)) != EX_OK)
130				return (res);
131			if ((res = ofwo_setstr(fd, buf, buflen, exent->ex_prop,
132			    val)) != EX_OK)
133				ofw_setprop(fd, ofw_optnode(fd),
134				    "security-password", "", 1);
135			return (res);
136		}
137		if (strcmp(val, "none") == 0) {
138			ofw_setprop(fd, ofw_optnode(fd), "security-password",
139			    "", 1);
140			return (ofwo_setstr(fd, buf, buflen, exent->ex_prop,
141			    val));
142		}
143		return (EX_DATAERR);
144	} else
145		ofwo_printprop(exent->ex_prop, (const char *)buf, buflen);
146	return (EX_OK);
147}
148
149static int
150ofwo_secpwd(const struct ofwo_extabent *exent, int fd, const void *buf,
151    int buflen, const char *val)
152{
153	void *pbuf;
154	int len, pblen, rv;
155
156	pblen = 0;
157	rv = EX_OK;
158	pbuf = NULL;
159	if (val) {
160		len = ofw_getprop_alloc(fd, ofw_optnode(fd), "security-mode",
161		    &pbuf, &pblen, 1);
162		if (len <= 0 || strncmp("none", (char *)pbuf, len) == 0) {
163			rv = EX_CONFIG;
164			warnx("no security mode set.");
165		} else if (strncmp("command", (char *)pbuf, len) == 0 ||
166		    strncmp("full", (char *)pbuf, len) == 0) {
167			rv = ofwo_setpass(fd);
168		} else {
169			rv = EX_CONFIG;
170			warnx("invalid security mode.");
171		}
172	} else
173		ofwo_printprop(exent->ex_prop, (const char *)buf, buflen);
174	if (pbuf != NULL)
175		free(pbuf);
176	return (rv);
177}
178
179static int
180ofwo_setpass(int fd)
181{
182	char pwd1[OFWO_MAXPWD + 1], pwd2[OFWO_MAXPWD + 1];
183
184	if (readpassphrase("New password:", pwd1, sizeof(pwd1),
185	    RPP_ECHO_OFF | RPP_REQUIRE_TTY) == NULL ||
186	    readpassphrase("Retype new password:", pwd2, sizeof(pwd2),
187	    RPP_ECHO_OFF | RPP_REQUIRE_TTY) == NULL)
188		errx(EX_USAGE, "failed to get password.");
189	if (strlen(pwd1) == 0) {
190		printf("Password unchanged.\n");
191		return (EX_OK);
192	}
193	if (strcmp(pwd1, pwd2) != 0) {
194		printf("Mismatch - password unchanged.\n");
195		return (EX_USAGE);
196	}
197	ofw_setprop(fd, ofw_optnode(fd), "security-password", pwd1,
198	    strlen(pwd1) + 1);
199	return (EX_OK);
200}
201
202static int
203ofwo_setstr(int fd, const void *buf, int buflen, const char *prop,
204    const char *val)
205{
206	void *pbuf;
207	int len, pblen, rv;
208	phandle_t optnode;
209	char *oval;
210
211	pblen = 0;
212	rv = EX_OK;
213	pbuf = NULL;
214	optnode = ofw_optnode(fd);
215	ofw_setprop(fd, optnode, prop, val, strlen(val) + 1);
216	len = ofw_getprop_alloc(fd, optnode, prop, &pbuf, &pblen, 1);
217	if (len < 0 || strncmp(val, (char *)pbuf, len) != 0) {
218		/*
219		 * The value is too long for this property and the OFW has
220		 * truncated it to fit or the value is illegal and a legal
221		 * one has been written instead (e.g. attempted to write
222		 * "foobar" to a "true"/"false"-property) - try to recover
223		 * the old value.
224		 */
225		rv = EX_DATAERR;
226		if ((oval = malloc(buflen + 1)) == NULL)
227			err(EX_OSERR, "malloc() failed.");
228		strncpy(oval, buf, buflen);
229		oval[buflen] = '\0';
230		len = ofw_setprop(fd, optnode, prop, oval, buflen + 1);
231		if (len != buflen)
232			errx(EX_IOERR, "recovery of old value failed.");
233		free(oval);
234		goto out;
235	}
236	printf("%s: %.*s%s->%s%.*s\n", prop, buflen, (const char *)buf,
237	    buflen > 0 ? " " : "", len > 0 ? " " : "", len, (char *)pbuf);
238out:
239	if (pbuf != NULL)
240		free(pbuf);
241	return (rv);
242}
243
244void
245ofwo_dump(void)
246{
247	void *pbuf;
248	int fd, len, nlen, pblen;
249	phandle_t optnode;
250	char prop[OFWO_MAXPROP + 1];
251	const struct ofwo_extabent *ex;
252
253	pblen = 0;
254	pbuf = NULL;
255	fd = ofw_open(O_RDONLY);
256	optnode = ofw_optnode(fd);
257	for (nlen = ofw_firstprop(fd, optnode, prop, sizeof(prop)); nlen != 0;
258	    nlen = ofw_nextprop(fd, optnode, prop, prop, sizeof(prop))) {
259		len = ofw_getprop_alloc(fd, optnode, prop, &pbuf, &pblen, 1);
260		if (len < 0)
261			continue;
262		if (strcmp(prop, "name") == 0)
263			continue;
264		for (ex = ofwo_extab; ex->ex_prop != NULL; ++ex)
265			if (strcmp(ex->ex_prop, prop) == 0)
266				break;
267		if (ex->ex_prop != NULL)
268			(*ex->ex_handler)(ex, fd, pbuf, len, NULL);
269		else
270			ofwo_printprop(prop, (char *)pbuf, len);
271	}
272	if (pbuf != NULL)
273		free(pbuf);
274	ofw_close(fd);
275}
276
277int
278ofwo_action(const char *prop, const char *val)
279{
280	void *pbuf;
281	int fd, len, pblen, rv;
282	const struct ofwo_extabent *ex;
283
284	pblen = 0;
285	rv = EX_OK;
286	pbuf = NULL;
287	if (strcmp(prop, "name") == 0)
288		return (EX_UNAVAILABLE);
289	if (val)
290		fd = ofw_open(O_RDWR);
291	else
292		fd = ofw_open(O_RDONLY);
293	len = ofw_getprop_alloc(fd, ofw_optnode(fd), prop, &pbuf, &pblen, 1);
294	if (len < 0) {
295		rv = EX_UNAVAILABLE;
296		goto out;
297	}
298	for (ex = ofwo_extab; ex->ex_prop != NULL; ++ex)
299		if (strcmp(ex->ex_prop, prop) == 0)
300			break;
301	if (ex->ex_prop != NULL)
302		rv = (*ex->ex_handler)(ex, fd, pbuf, len, val);
303	else if (val)
304		rv = ofwo_setstr(fd, pbuf, len, prop, val);
305	else
306		ofwo_printprop(prop, (char *)pbuf, len);
307out:
308	if (pbuf != NULL)
309		free(pbuf);
310	ofw_close(fd);
311	return (rv);
312}
313