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