xref: /titanic_41/usr/src/lib/libnisdb/ldap_ldap.c (revision 7c478bd95313f5f23a4c958a745db2134aa03244)
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, Version 1.0 only
6  * (the "License").  You may not use this file except in compliance
7  * with the License.
8  *
9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10  * or http://www.opensolaris.org/os/licensing.
11  * See the License for the specific language governing permissions
12  * and limitations under the License.
13  *
14  * When distributing Covered Code, include this CDDL HEADER in each
15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16  * If applicable, add the following below this CDDL HEADER, with the
17  * fields enclosed by brackets "[]" replaced with your own identifying
18  * information: Portions Copyright [yyyy] [name of copyright owner]
19  *
20  * CDDL HEADER END
21  */
22 /*
23  * Copyright 2001-2003 Sun Microsystems, Inc.  All rights reserved.
24  * Use is subject to license terms.
25  */
26 
27 #pragma ident	"%Z%%M%	%I%	%E% SMI"
28 
29 
30 #include <lber.h>
31 #include <ldap.h>
32 #include <string.h>
33 
34 #include "ldap_util.h"
35 #include "ldap_op.h"
36 #include "ldap_attr.h"
37 #include "ldap_ldap.h"
38 
39 
40 static __nis_value_t *
evalMappingElement(__nis_mapping_element_t * e,__nis_rule_value_t * rvIn)41 evalMappingElement(__nis_mapping_element_t *e, __nis_rule_value_t *rvIn) {
42 	__nis_rule_value_t	*rv = rvIn;
43 	int			freeRv = 0;
44 	__nis_value_t		*val;
45 
46 	if (rv == 0) {
47 		rv = initRuleValue(1, 0);
48 		if (rv == 0)
49 			return (0);
50 		freeRv = 1;
51 	}
52 
53 	val = getMappingElement(e, mit_any, rv, NULL);
54 
55 	if (freeRv)
56 		freeRuleValue(rv, 1);
57 
58 	return (val);
59 }
60 
61 __nis_value_t *
lookupLDAP(__nis_search_triple_t * t,char * attrName,__nis_rule_value_t * rv,__nis_object_dn_t * def,int * np_ldap_stat)62 lookupLDAP(__nis_search_triple_t *t, char *attrName, __nis_rule_value_t *rv,
63 		__nis_object_dn_t *def, int *np_ldap_stat) {
64 	__nis_value_t		*val, *eVal = 0;
65 	char			*base, *filter;
66 	__nis_ldap_search_t	*ls;
67 	char			*attrs[2];
68 	int			scope, i, stat, nrv = 0, freeBase = 0;
69 	char			*myself = "lookupLDAP";
70 
71 	if (t == 0 || slen(attrName) <= 0)
72 		return (0);
73 
74 	if (t->element != 0) {
75 		/* Evaluate t->element to get the t->attrs value */
76 
77 		eVal = evalMappingElement(t->element, rv);
78 
79 		if (eVal == 0)
80 			return (0);
81 
82 		if (eVal->type != vt_string || eVal->numVals <= 0) {
83 			freeValue(eVal, 1);
84 			{
85 				char	*ename = "<unknown>";
86 
87 				eVal = evalMappingElement(t->element, 0);
88 				if (eVal != 0 && eVal->type == vt_string &&
89 					eVal->numVals == 1 &&
90 					eVal->val[0].length > 0 &&
91 					eVal->val[0].value != 0)
92 					ename = eVal->val[0].value;
93 				logmsg(MSG_NOTIMECHECK, LOG_ERR,
94 			"%s: %s: unable to evaluate filter expression \"%s\"",
95 					myself, attrName, ename);
96 				freeValue(eVal, 1);
97 			}
98 			return (0);
99 		}
100 
101 		filter = eVal->val[0].value;
102 	} else {
103 		filter = t->attrs;
104 	}
105 
106 	if (slen(t->base) > 0) {
107 		base = appendBase(t->base, (def != 0) ? def->read.base : 0,
108 					&stat, 0);
109 		if (stat != 0) {
110 			logmsg(MSG_NOTIMECHECK, LOG_ERR,
111 				"%s: %s: error appending \"%s\" to \"%s\"",
112 				myself, attrName, NIL(def->read.base),
113 				NIL(t->base));
114 			return (0);
115 		}
116 		freeBase = 1;
117 	} else {
118 		if (def == 0 || def->read.scope == LDAP_SCOPE_UNKNOWN ||
119 				slen(def->read.base) <= 0) {
120 			logmsg(MSG_NOTIMECHECK, LOG_ERR,
121 				"%s: %s: no supplied or default search base",
122 				myself, attrName);
123 			freeValue(eVal, 1);
124 			return (0);
125 		}
126 		base = def->read.base;
127 	}
128 
129 	if (slen(filter) > 0)
130 		scope = t->scope;
131 	else
132 		scope = LDAP_SCOPE_BASE;
133 
134 	attrs[0] = attrName;
135 	attrs[1] = 0;
136 
137 	ls = buildLdapSearch(base, scope, 0, 0, filter, attrs, 0, 0);
138 	if (ls == 0) {
139 		logmsg(MSG_NOTIMECHECK, LOG_ERR,
140 	"%s: %s: error building LDAP search information for \"%s?%s?%s\"",
141 			myself, attrName, NIL(base), getScope(scope),
142 			NIL(filter));
143 		freeValue(eVal, 1);
144 		if (freeBase)
145 			sfree(base);
146 		return (0);
147 	}
148 
149 	rv = ldapSearch(ls, &nrv, 0, &stat);
150 	freeLdapSearch(ls);
151 
152 	/*
153 	 * If ldapSearch returns LDAP_NO_SUCH_OBJECT, then entry that
154 	 * looked for is not there in LDAP, so return NP_LDAP_NO_VALUE
155 	 * in np_ldap_stat.
156 	 */
157 
158 	if (np_ldap_stat != NULL && stat == LDAP_NO_SUCH_OBJECT)
159 		*np_ldap_stat = NP_LDAP_NO_VALUE;
160 
161 	if (rv == 0) {
162 		logmsg(MSG_NOTIMECHECK,
163 			(stat == LDAP_NO_SUCH_OBJECT)?LOG_DEBUG:LOG_ERR,
164 			"%s: %s: LDAP error %d (%s) for \"%s?%s?%s\"",
165 			myself, attrName, stat, ldap_err2string(stat),
166 			NIL(base), getScope(scope), NIL(filter));
167 		if (freeBase)
168 			sfree(base);
169 		freeValue(eVal, 1);
170 		return (0);
171 	}
172 
173 	if (freeBase)
174 		sfree(base);
175 	freeValue(eVal, 1);
176 	eVal = 0;
177 
178 	for (i = 0, val = 0; i < nrv; i++) {
179 		int	j;
180 		for (j = 0; j < rv[i].numAttrs; j++) {
181 			if (strcasecmp(attrName, rv[i].attrName[j]) == 0) {
182 				eVal = concatenateValues(val,
183 							&rv[i].attrVal[j]);
184 				freeValue(val, 1);
185 				if (eVal == 0) {
186 					freeRuleValue(rv, nrv);
187 					return (0);
188 				}
189 				val = eVal;
190 				break;
191 			}
192 		}
193 	}
194 
195 	freeRuleValue(rv, nrv);
196 	return (val);
197 }
198 
199 /*
200  * Store 'val' at the LDAP location indicated by 'item'. As usual,
201  * val->numVals == -1 indicates deletion.
202  *
203  * The 'index' and 'numIndexes' parameters are used as follows:
204  *
205  *	index < 0 || index >= numIndexes
206  *		Illegal
207  *
208  *	index >= val->numVals
209  *		Store val->val[val->numVals-1]
210  *
211  *	item->repeat == 0 || index < numIndexes
212  *		Store val->val[index]
213  *
214  *	Else (repeat != 0 && index == numIndexes-1)
215  *		Store val->val[index...val->numVals-1]
216  *
217  * 'defDN' should be the default object DN specification, primarily
218  * used when the item search triple is invalid. Also, the defDN->write.base
219  * value is appended to the item search base if the latter is empty, or ends
220  * in a comma.
221  *
222  * If the item search triple is invalid, 'dn' must contain the DN(s)
223  * of the LDAP entry to be modified. If the search triple is valid,
224  * the DN(s) is(are) either:
225  *	Derived via an LDAP search on the search triple 'attrs' or
226  *      'element' fields, or (if neither of those fields is set)
227  *	assumed to be the search triple base.
228  *
229  * Returns LDAP_SUCCESS when successful, or an appropriate LDAP
230  * error status otherwise.
231  */
232 int
storeLDAP(__nis_mapping_item_t * item,int index,int numIndexes,__nis_value_t * val,__nis_object_dn_t * defDN,char ** dn,int numDN)233 storeLDAP(__nis_mapping_item_t *item, int index, int numIndexes,
234 		__nis_value_t *val, __nis_object_dn_t *defDN,
235 		char **dn, int numDN) {
236 	__nis_ldap_search_t	ls;
237 	int			stat, i, ix, six, nix;
238 	int			freeDN = 0;
239 	char			*locDN[1];
240 	__nis_rule_value_t	*rv;
241 	char			*defBase = 0;
242 	char			*myself = "storeLDAP";
243 
244 	if (item == 0 || item->type != mit_ldap || item->name == 0 ||
245 			index < 0 || index >= numIndexes ||
246 			val == 0 || val->numVals < -1 || val->numVals == 0)
247 		return (LDAP_PARAM_ERROR);
248 
249 	if (defDN != 0 && slen(defDN->write.base) > 0)
250 		defBase = defDN->write.base;
251 
252 	ls.numFilterComps = 0;
253 	ls.filterComp = 0;
254 	ls.numAttrs = 0;
255 	ls.attrs = 0;
256 	ls.isDN = 0;
257 
258 	if (item->searchSpec.triple.scope == LDAP_SCOPE_UNKNOWN) {
259 		/* If 'defDN' is NULL, we don't know where to write */
260 		if (defDN == 0)
261 			return (LDAP_PARAM_ERROR);
262 		/*
263 		 * Check if we're supposed to write. Since we want the
264 		 * admin to be able to use the nisplusLDAPobjectDN attribute
265 		 * as an on/off switch, we don't flag failure as an error.
266 		 */
267 		if (defDN != 0 && defDN->write.scope == LDAP_SCOPE_UNKNOWN) {
268 			logmsg(MSG_NOTIMECHECK, LOG_INFO,
269 				"%s: write not enabled for \"%s\"",
270 				myself, NIL(item->name));
271 			return (LDAP_SUCCESS);
272 		}
273 	} else {
274 		/*
275 		 * Attempt to get a DN from the search triple.
276 		 */
277 
278 		if (slen(item->searchSpec.triple.base) > 0)
279 			ls.base = item->searchSpec.triple.base;
280 		else
281 			ls.base = defBase;
282 		ls.base = appendBase(ls.base, defBase, &stat, 0);
283 		if (stat != 0)
284 			return (0);
285 		ls.scope = item->searchSpec.triple.scope;
286 
287 		/*
288 		 * If the search triple specifies a filter, we use the
289 		 * base, scope and filter to get an entry to supply the
290 		 * DN. Otherwise, the triple.base is assumed to be the DN.
291 		 */
292 		if (slen(item->searchSpec.triple.attrs) > 0 ||
293 				item->searchSpec.triple.element != 0) {
294 			__nis_value_t		*eVal = 0;
295 			__nis_rule_value_t	*rvDN;
296 			int			nv = 0;
297 
298 			if (item->searchSpec.triple.element != 0) {
299 				eVal = evalMappingElement(
300 					item->searchSpec.triple.element, 0);
301 
302 				if (eVal == 0) {
303 					sfree(ls.base);
304 					return (0);
305 				}
306 
307 				if (eVal->type != vt_string ||
308 						eVal->numVals <= 0) {
309 					sfree(ls.base);
310 					freeValue(eVal, 1);
311 					return (0);
312 				}
313 
314 				ls.filter = eVal->val[0].value;
315 			} else {
316 				ls.filter = item->searchSpec.triple.attrs;
317 			}
318 
319 			rvDN = ldapSearch(&ls, &nv, 0, &stat);
320 			sfree(ls.base);
321 			freeValue(eVal, 1);
322 			if (rvDN == 0 || nv <= 0)
323 				return (stat);
324 
325 			/* Look for DNs */
326 			dn = findDNs(myself, rvDN, nv, 0, &numDN);
327 			freeRuleValue(rvDN, nv);
328 			if (dn == 0 || numDN <= 0) {
329 				freeDNs(dn, numDN);
330 				return (LDAP_NO_MEMORY);
331 			}
332 			freeDN = 1;
333 		} else if (slen(item->searchSpec.triple.base) > 0) {
334 			locDN[0] = item->searchSpec.triple.base;
335 			dn = locDN;
336 			numDN = 1;
337 		}
338 	}
339 
340 	/* We must have at least one DN to continue */
341 	if (dn == 0 || numDN < 1) {
342 		if (freeDN)
343 			freeDNs(dn, numDN);
344 		return (LDAP_PARAM_ERROR);
345 	}
346 
347 	if (val->numVals > 0) {
348 		/* Make a rule-value describing the modification */
349 		rv = am(myself, sizeof (*rv));
350 		if (rv == 0)
351 			return (LDAP_NO_MEMORY);
352 		rv->attrName = am(myself, sizeof (rv->attrName[0]));
353 		rv->attrVal = am(myself, sizeof (rv->attrVal[0]));
354 		if (rv->attrName == 0 || rv->attrVal == 0) {
355 			if (freeDN)
356 				freeDNs(dn, numDN);
357 			freeRuleValue(rv, 1);
358 			return (LDAP_NO_MEMORY);
359 		}
360 
361 		/*
362 		 * What's the start index in val->val[], and how many elements
363 		 * should we copy ?
364 		 */
365 		if (index < val->numVals)
366 			six = index;
367 		else
368 			six = val->numVals - 1;
369 		if (item->repeat && index == (numIndexes - 1))
370 			nix = 1 + (six - (val->numVals - 1));
371 		else
372 			nix = 1;
373 
374 		rv->attrName[0] = sdup(myself, T, item->name);
375 		rv->attrVal[0].val = am(myself,
376 				nix * sizeof (rv->attrVal[0].val[0]));
377 		if (rv->attrName[0] == 0 || rv->attrVal[0].val == 0) {
378 			if (freeDN)
379 				freeDNs(dn, numDN);
380 			freeRuleValue(rv, 1);
381 			return (LDAP_NO_MEMORY);
382 		}
383 		rv->numAttrs = 1;
384 		for (ix = six; ix < nix; ix++) {
385 			rv->attrVal[0].numVals++;
386 			rv->attrVal[0].val[ix-six].value =
387 					am(myself, val->val[ix].length);
388 			if (rv->attrVal[0].val[ix-six].value == 0 &&
389 					val->val[ix].value != 0) {
390 				if (freeDN)
391 					freeDNs(dn, numDN);
392 				freeRuleValue(rv, 1);
393 				return (LDAP_NO_MEMORY);
394 			}
395 			rv->attrVal[0].val[ix-six].length =
396 				val->val[ix].length;
397 			if (rv->attrVal[0].val[ix-six].length > 0) {
398 				(void) memcpy(rv->attrVal[0].val[ix-six].value,
399 					val->val[ix].value,
400 					rv->attrVal[0].val[ix-six].length);
401 			}
402 		}
403 		rv->attrVal[0].type = val->type;
404 	} else {
405 		/*
406 		 * We already rejected val->numvals < -1 and val->numVals == 0
407 		 * in the initial sanity check, so it must be -1. This means
408 		 * deletion, which we indicate to ldapModify() by supplying
409 		 * a NULL rule-value pointer.
410 		 */
411 		rv = 0;
412 	}
413 
414 	/* For each DN */
415 	for (i = 0; i < numDN; i++) {
416 		stat = ldapModify(dn[i], rv, item->searchSpec.triple.attrs, 0);
417 		if (stat != LDAP_SUCCESS)
418 			break;
419 	}
420 
421 	if (freeDN)
422 		freeDNs(dn, numDN);
423 	freeRuleValue(rv, 1);
424 
425 	return (stat);
426 }
427