4 Copyright (C) Andrew Tridgell 2005
6 ** NOTE! The following LGPL license applies to the ldb
7 ** library. This does NOT imply that all of Samba is released
10 This library is free software; you can redistribute it and/or
11 modify it under the terms of the GNU Lesser General Public
12 License as published by the Free Software Foundation; either
13 version 3 of the License, or (at your option) any later version.
15 This library is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 Lesser General Public License for more details.
20 You should have received a copy of the GNU Lesser General Public
21 License along with this library; if not, see <http://www.gnu.org/licenses/>.
24 attribute handlers for well known attribute types, selected by syntax OID
28 #include "ldb_includes.h"
29 #include "system/locale.h"
30 #include "ldb_handlers.h"
33 default handler that just copies a ldb_val.
35 int ldb_handler_copy(struct ldb_context *ldb, void *mem_ctx,
36 const struct ldb_val *in, struct ldb_val *out)
38 *out = ldb_val_dup(mem_ctx, in);
39 if (in->length > 0 && out->data == NULL) {
47 a case folding copy handler, removing leading and trailing spaces and
48 multiple internal spaces
50 We exploit the fact that utf8 never uses the space octet except for
53 int ldb_handler_fold(struct ldb_context *ldb, void *mem_ctx,
54 const struct ldb_val *in, struct ldb_val *out)
58 if (!in || !out || !(in->data)) {
62 out->data = (uint8_t *)ldb_casefold(ldb, mem_ctx, (const char *)(in->data));
63 if (out->data == NULL) {
64 ldb_debug(ldb, LDB_DEBUG_ERROR, "ldb_handler_fold: unable to casefold string [%s]", in->data);
68 s = (char *)(out->data);
70 /* remove trailing spaces if any */
72 while (l > 0 && s[l - 1] == ' ') l--;
75 /* remove leading spaces if any */
77 for (t = s; *s == ' '; s++) ;
79 /* remove leading spaces by moving down the string */
85 /* check middle spaces */
86 while ((t = strchr(s, ' ')) != NULL) {
87 for (s = t; *s == ' '; s++) ;
92 /* remove all spaces but one by moving down the string */
97 out->length = strlen((char *)out->data);
104 canonicalise a ldap Integer
105 rfc2252 specifies it should be in decimal form
107 int ldb_canonicalise_Integer(struct ldb_context *ldb, void *mem_ctx,
108 const struct ldb_val *in, struct ldb_val *out)
111 long long i = strtoll((char *)in->data, &end, 0);
115 out->data = (uint8_t *)talloc_asprintf(mem_ctx, "%lld", i);
116 if (out->data == NULL) {
119 out->length = strlen((char *)out->data);
126 int ldb_comparison_Integer(struct ldb_context *ldb, void *mem_ctx,
127 const struct ldb_val *v1, const struct ldb_val *v2)
129 return strtoll((char *)v1->data, NULL, 0) - strtoll((char *)v2->data, NULL, 0);
133 compare two binary blobs
135 int ldb_comparison_binary(struct ldb_context *ldb, void *mem_ctx,
136 const struct ldb_val *v1, const struct ldb_val *v2)
138 if (v1->length != v2->length) {
139 return v1->length - v2->length;
141 return memcmp(v1->data, v2->data, v1->length);
145 compare two case insensitive strings, ignoring multiple whitespaces
146 and leading and trailing whitespaces
147 see rfc2252 section 8.1
149 try to optimize for the ascii case,
150 but if we find out an utf8 codepoint revert to slower but correct function
152 int ldb_comparison_fold(struct ldb_context *ldb, void *mem_ctx,
153 const struct ldb_val *v1, const struct ldb_val *v2)
155 const char *s1=(const char *)v1->data, *s2=(const char *)v2->data;
159 while (*s1 == ' ') s1++;
160 while (*s2 == ' ') s2++;
161 /* TODO: make utf8 safe, possibly with helper function from application */
163 /* the first 127 (0x7F) chars are ascii and utf8 guarantes they
164 * never appear in multibyte sequences */
165 if (((unsigned char)s1[0]) & 0x80) goto utf8str;
166 if (((unsigned char)s2[0]) & 0x80) goto utf8str;
167 if (toupper((unsigned char)*s1) != toupper((unsigned char)*s2))
170 while (s1[0] == s1[1]) s1++;
171 while (s2[0] == s2[1]) s2++;
175 if (! (*s1 && *s2)) {
176 /* check for trailing spaces only if one of the pointers
177 * has reached the end of the strings otherwise we
178 * can mistakenly match.
179 * ex. "domain users" <-> "domainUpdates"
181 while (*s1 == ' ') s1++;
182 while (*s2 == ' ') s2++;
184 return (int)(toupper(*s1)) - (int)(toupper(*s2));
187 /* no need to recheck from the start, just from the first utf8 char found */
188 b1 = ldb_casefold(ldb, mem_ctx, s1);
189 b2 = ldb_casefold(ldb, mem_ctx, s2);
192 /* Both strings converted correctly */
197 /* One of the strings was not UTF8, so we have no options but to do a binary compare */
207 while (u1[0] == u1[1]) u1++;
208 while (u2[0] == u2[1]) u2++;
212 if (! (*u1 && *u2)) {
213 while (*u1 == ' ') u1++;
214 while (*u2 == ' ') u2++;
216 ret = (int)(*u1 - *u2);
225 canonicalise a attribute in DN format
227 int ldb_canonicalise_dn(struct ldb_context *ldb, void *mem_ctx,
228 const struct ldb_val *in, struct ldb_val *out)
236 dn = ldb_dn_new(ldb, mem_ctx, (char *)in->data);
237 if ( ! ldb_dn_validate(dn)) {
238 return LDB_ERR_INVALID_DN_SYNTAX;
241 out->data = (uint8_t *)ldb_dn_alloc_casefold(mem_ctx, dn);
242 if (out->data == NULL) {
245 out->length = strlen((char *)out->data);
258 int ldb_comparison_dn(struct ldb_context *ldb, void *mem_ctx,
259 const struct ldb_val *v1, const struct ldb_val *v2)
261 struct ldb_dn *dn1 = NULL, *dn2 = NULL;
264 dn1 = ldb_dn_new(ldb, mem_ctx, (char *)v1->data);
265 if ( ! ldb_dn_validate(dn1)) return -1;
267 dn2 = ldb_dn_new(ldb, mem_ctx, (char *)v2->data);
268 if ( ! ldb_dn_validate(dn2)) {
273 ret = ldb_dn_compare(dn1, dn2);
281 compare two utc time values. 1 second resolution
283 int ldb_comparison_utctime(struct ldb_context *ldb, void *mem_ctx,
284 const struct ldb_val *v1, const struct ldb_val *v2)
287 t1 = ldb_string_to_time((char *)v1->data);
288 t2 = ldb_string_to_time((char *)v2->data);
289 return (int)t2 - (int)t1;
293 canonicalise a utc time
295 int ldb_canonicalise_utctime(struct ldb_context *ldb, void *mem_ctx,
296 const struct ldb_val *in, struct ldb_val *out)
298 time_t t = ldb_string_to_time((char *)in->data);
299 out->data = (uint8_t *)ldb_timestring(mem_ctx, t);
300 if (out->data == NULL) {
303 out->length = strlen((char *)out->data);
308 table of standard attribute handlers
310 static const struct ldb_schema_syntax ldb_standard_syntaxes[] = {
312 .name = LDB_SYNTAX_INTEGER,
313 .ldif_read_fn = ldb_handler_copy,
314 .ldif_write_fn = ldb_handler_copy,
315 .canonicalise_fn = ldb_canonicalise_Integer,
316 .comparison_fn = ldb_comparison_Integer
319 .name = LDB_SYNTAX_OCTET_STRING,
320 .ldif_read_fn = ldb_handler_copy,
321 .ldif_write_fn = ldb_handler_copy,
322 .canonicalise_fn = ldb_handler_copy,
323 .comparison_fn = ldb_comparison_binary
326 .name = LDB_SYNTAX_DIRECTORY_STRING,
327 .ldif_read_fn = ldb_handler_copy,
328 .ldif_write_fn = ldb_handler_copy,
329 .canonicalise_fn = ldb_handler_fold,
330 .comparison_fn = ldb_comparison_fold
333 .name = LDB_SYNTAX_DN,
334 .ldif_read_fn = ldb_handler_copy,
335 .ldif_write_fn = ldb_handler_copy,
336 .canonicalise_fn = ldb_canonicalise_dn,
337 .comparison_fn = ldb_comparison_dn
340 .name = LDB_SYNTAX_OBJECTCLASS,
341 .ldif_read_fn = ldb_handler_copy,
342 .ldif_write_fn = ldb_handler_copy,
343 .canonicalise_fn = ldb_handler_fold,
344 .comparison_fn = ldb_comparison_fold
347 .name = LDB_SYNTAX_UTC_TIME,
348 .ldif_read_fn = ldb_handler_copy,
349 .ldif_write_fn = ldb_handler_copy,
350 .canonicalise_fn = ldb_canonicalise_utctime,
351 .comparison_fn = ldb_comparison_utctime
357 return the attribute handlers for a given syntax name
359 const struct ldb_schema_syntax *ldb_standard_syntax_by_name(struct ldb_context *ldb,
363 unsigned num_handlers = sizeof(ldb_standard_syntaxes)/sizeof(ldb_standard_syntaxes[0]);
364 /* TODO: should be replaced with a binary search */
365 for (i=0;i<num_handlers;i++) {
366 if (strcmp(ldb_standard_syntaxes[i].name, syntax) == 0) {
367 return &ldb_standard_syntaxes[i];