1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21 /*
22 * Copyright 2010 Sun Microsystems, Inc. All rights reserved.
23 * Use is subject to license terms.
24 *
25 * From "tsol_tndb_parser.c 7.24 01/09/05 SMI; TSOL 2.x"
26 *
27 * These functions parse entries in the "tnrhtp" (remote host template) file.
28 * Each entry in this file has two fields, separated by a colon. The first
29 * field is the template name. The second is a list of "key=value" attributes,
30 * separated by semicolons.
31 *
32 * In order to help preserve sanity, we do not allow more than one unescaped
33 * colon in a line, nor any unescaped '=' or ';' characters in the template
34 * name. Such things are indicative of typing errors, not intentional
35 * configuration.
36 */
37
38 #include <stdio.h>
39 #include <ctype.h>
40 #include <stdlib.h>
41 #include <stddef.h>
42 #include <string.h>
43 #include <strings.h>
44 #include <libtsnet.h>
45 #include <tsol/label.h>
46 #include <sys/tsol/label_macro.h>
47 #include <sys/types.h>
48 #include <nss.h>
49 #include <secdb.h>
50 #include <errno.h>
51
52 static int
get_tn_doi(tsol_tpent_t * tpentp,kva_t * kv)53 get_tn_doi(tsol_tpent_t *tpentp, kva_t *kv)
54 {
55 char *cp;
56 char *val = NULL;
57
58 val = kva_match(kv, TP_DOI);
59 if (val == NULL)
60 return (LTSNET_NO_DOI);
61
62 errno = 0;
63 tpentp->tp_doi = strtol(val, &cp, 0);
64 if (errno != 0)
65 return (LTSNET_SYSERR);
66 if (*cp != '\0')
67 return (LTSNET_ILL_DOI);
68
69 return (0);
70 }
71
72 static int
get_tn_sl_range(brange_t * range,char * min,char * max)73 get_tn_sl_range(brange_t *range, char *min, char *max)
74 {
75 m_label_t *slp;
76
77 if (min == NULL && max == NULL)
78 return (LTSNET_NO_RANGE);
79 if (min == NULL)
80 return (LTSNET_NO_LOWERBOUND);
81 if (max == NULL)
82 return (LTSNET_NO_UPPERBOUND);
83
84 slp = &range->lower_bound;
85 if (str_to_label(min, &slp, MAC_LABEL, L_NO_CORRECTION, NULL) != 0)
86 return (LTSNET_ILL_LOWERBOUND);
87 slp = &range->upper_bound;
88 if (str_to_label(max, &slp, MAC_LABEL, L_NO_CORRECTION, NULL) != 0)
89 return (LTSNET_ILL_UPPERBOUND);
90 if (!bldominates(&range->upper_bound, &range->lower_bound))
91 return (LTSNET_ILL_RANGE);
92
93 return (0);
94 }
95
96 static int
get_tn_sl_set(blset_t * labelset,char * setstr)97 get_tn_sl_set(blset_t *labelset, char *setstr)
98 {
99 int sc;
100 char *tokp, *finally;
101 m_label_t *labels, *slp;
102
103 (void) memset(labelset, 0, sizeof (blset_t));
104 labels = (m_label_t *)labelset;
105 tokp = strtok_r(setstr, TNDB_COMMA, &finally);
106 for (sc = 0; tokp != NULL && sc < NSLS_MAX; sc++) {
107 slp = &labels[sc];
108 if (str_to_label(tokp, &slp, MAC_LABEL, L_NO_CORRECTION,
109 NULL) != 0)
110 return (LTSNET_ILL_LABEL);
111 tokp = strtok_r(NULL, TNDB_COMMA, &finally);
112 }
113 if (tokp != NULL && sc >= NSLS_MAX)
114 return (LTSNET_SET_TOO_BIG);
115
116 return (0);
117 }
118
119 static int
parse_remainder(tsol_tpent_t * tpentp,kva_t * kv)120 parse_remainder(tsol_tpent_t *tpentp, kva_t *kv)
121 {
122 int err = 0;
123 char *val = NULL;
124 char *val2 = NULL;
125
126 val = kva_match(kv, TP_HOSTTYPE);
127
128 if (val == NULL)
129 return (LTSNET_NO_HOSTTYPE);
130 if (strcasecmp(val, TP_UNLABELED) == 0)
131 tpentp->host_type = UNLABELED;
132 else if (strcasecmp(val, TP_CIPSO) == 0)
133 tpentp->host_type = SUN_CIPSO;
134 else
135 return (LTSNET_ILL_HOSTTYPE);
136
137 /*
138 * parse fields by host type -
139 * add on to the following if statement for each new host type.
140 */
141 if (tpentp->host_type == UNLABELED) {
142 m_label_t *slp;
143
144 tpentp->tp_mask_unl = 0;
145 /*
146 * doi
147 */
148 if ((err = get_tn_doi(tpentp, kv)) != 0)
149 return (err);
150 tpentp->tp_mask_unl |= TSOL_MSK_CIPSO_DOI;
151 /*
152 * default label
153 */
154 val = kva_match(kv, TP_DEFLABEL);
155 if (val == NULL)
156 return (LTSNET_NO_LABEL);
157 slp = &tpentp->tp_def_label;
158 if (str_to_label(val, &slp, MAC_LABEL, L_NO_CORRECTION,
159 NULL) != 0)
160 return (LTSNET_ILL_LABEL);
161 tpentp->tp_mask_unl |= TSOL_MSK_DEF_LABEL;
162 /*
163 * check label range
164 */
165 val = kva_match(kv, TP_MINLABEL);
166 val2 = kva_match(kv, TP_MAXLABEL);
167 if (val == NULL && val2 == NULL) {
168 m_label_t *llow = NULL;
169 /*
170 * This is the old format. Use ADMIN_LOW to SL of the
171 * default label as the gw_sl_range.
172 */
173 if (str_to_label(ADMIN_LOW, &llow, MAC_LABEL,
174 L_NO_CORRECTION, NULL) == -1)
175 return (LTSNET_ILL_LABEL);
176 tpentp->tp_gw_sl_range.lower_bound = *llow;
177 m_label_free(llow);
178 tpentp->tp_gw_sl_range.upper_bound =
179 tpentp->tp_def_label;
180 } else {
181 err = get_tn_sl_range(&tpentp->tp_gw_sl_range, val,
182 val2);
183 if (err != 0)
184 return (err);
185 }
186 tpentp->tp_mask_unl |= TSOL_MSK_SL_RANGE_TSOL;
187
188 /*
189 * also label set, if present. (optional)
190 */
191 val = kva_match(kv, TP_SET);
192 if (val != NULL) {
193 err = get_tn_sl_set(&tpentp->tp_gw_sl_set, val);
194 if (err != 0)
195 return (err);
196 tpentp->tp_mask_cipso |= TSOL_MSK_SL_RANGE_TSOL;
197 }
198 } else {
199 tpentp->tp_mask_cipso = 0;
200 /*
201 * doi
202 */
203 if ((err = get_tn_doi(tpentp, kv)) != 0)
204 return (err);
205 tpentp->tp_mask_cipso |= TSOL_MSK_CIPSO_DOI;
206 /*
207 * label range
208 */
209 val = kva_match(kv, TP_MINLABEL);
210 val2 = kva_match(kv, TP_MAXLABEL);
211 err = get_tn_sl_range(&tpentp->tp_sl_range_cipso, val, val2);
212 if (err != 0)
213 return (err);
214 tpentp->tp_mask_cipso |= TSOL_MSK_SL_RANGE_TSOL;
215 /*
216 * also label set, if present. (optional)
217 */
218 val = kva_match(kv, TP_SET);
219 if (val != NULL) {
220 err = get_tn_sl_set(&tpentp->tp_sl_set_cipso, val);
221 if (err != 0)
222 return (err);
223 tpentp->tp_mask_cipso |= TSOL_MSK_SL_RANGE_TSOL;
224 }
225
226 /* CIPSO entries don't support default labels */
227 val = kva_match(kv, TP_DEFLABEL);
228 if (val != NULL)
229 return (LTSNET_BAD_TYPE);
230 }
231
232 return (0);
233 }
234
235 tsol_tpent_t *
tpstr_to_ent(tsol_tpstr_t * tpstrp,int * errp,char ** errstrp)236 tpstr_to_ent(tsol_tpstr_t *tpstrp, int *errp, char **errstrp)
237 {
238 int err = 0;
239 char *errstr;
240 char *template = tpstrp->template;
241 char *attrs = tpstrp->attrs;
242 kva_t *kv;
243 tsol_tpent_t *tpentp = NULL;
244
245 /*
246 * The user can specify NULL pointers for these. Make sure that we
247 * don't have to deal with checking for NULL everywhere by just
248 * pointing to our own variables if the user gives NULL.
249 */
250 if (errp == NULL)
251 errp = &err;
252 if (errstrp == NULL)
253 errstrp = &errstr;
254 /* The default, unless we find a more specific error locus. */
255 *errstrp = template;
256
257 if (template == NULL || *template == '#' || *template == '\n') {
258 *errp = LTSNET_EMPTY;
259 if (attrs && *attrs != '\0' && *attrs != '#' && *attrs != '\n')
260 *errstrp = attrs;
261 else if (template == NULL)
262 *errstrp = " ";
263 goto err_ret;
264 }
265 if (*template == '\0') {
266 *errp = LTSNET_NO_NAME;
267 if (attrs && *attrs != '\0' && *attrs != '#' && *attrs != '\n')
268 *errstrp = attrs;
269 goto err_ret;
270 }
271 if (attrs == NULL || *attrs == '\0' || *attrs == '#' ||
272 *attrs == '\n') {
273 *errp = LTSNET_NO_ATTRS;
274 goto err_ret;
275 }
276 if ((tpentp = calloc(1, sizeof (*tpentp))) == NULL) {
277 *errp = LTSNET_SYSERR;
278 return (NULL);
279 }
280 if ((strlcpy(tpentp->name, template, sizeof (tpentp->name)) >=
281 sizeof (tpentp->name)) ||
282 strpbrk(tpentp->name, TN_RESERVED) != NULL) {
283 *errp = LTSNET_ILL_NAME;
284 goto err_ret;
285 }
286 kv = _str2kva(attrs, KV_ASSIGN, KV_DELIMITER);
287 *errp = parse_remainder(tpentp, kv);
288 _kva_free(kv);
289 if (*errp == 0) {
290 #ifdef DEBUG
291 (void) fprintf(stdout, "tpstr_to_ent: %s:%s\n", tpentp->name,
292 attrs);
293 #endif /* DEBUG */
294
295 return (tpentp);
296 }
297
298 err_ret:
299 err = errno;
300 tsol_freetpent(tpentp);
301 errno = err;
302 #ifdef DEBUG
303 (void) fprintf(stderr, "\ntpstr_to_ent: %s:%s\n",
304 *errstrp, (char *)tsol_strerror(*errp, errno));
305 #endif /* DEBUG */
306
307 return (NULL);
308 }
309
310 void
tsol_freetpent(tsol_tpent_t * tp)311 tsol_freetpent(tsol_tpent_t *tp)
312 {
313 if (tp != NULL)
314 free(tp);
315 }
316