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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 17:20:00 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 17:20:00 +0000
commit8daa83a594a2e98f39d764422bfbdbc62c9efd44 (patch)
tree4099e8021376c7d8c05bdf8503093d80e9c7bad0 /lib/ldb/common/ldb_utf8.c
parentInitial commit. (diff)
downloadsamba-8daa83a594a2e98f39d764422bfbdbc62c9efd44.tar.xz
samba-8daa83a594a2e98f39d764422bfbdbc62c9efd44.zip
Adding upstream version 2:4.20.0+dfsg.upstream/2%4.20.0+dfsg
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'lib/ldb/common/ldb_utf8.c')
-rw-r--r--lib/ldb/common/ldb_utf8.c140
1 files changed, 140 insertions, 0 deletions
diff --git a/lib/ldb/common/ldb_utf8.c b/lib/ldb/common/ldb_utf8.c
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+++ b/lib/ldb/common/ldb_utf8.c
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+/*
+ ldb database library
+
+ Copyright (C) Andrew Tridgell 2004
+
+ ** NOTE! The following LGPL license applies to the ldb
+ ** library. This does NOT imply that all of Samba is released
+ ** under the LGPL
+
+ This library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 3 of the License, or (at your option) any later version.
+
+ This library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with this library; if not, see <http://www.gnu.org/licenses/>.
+*/
+
+/*
+ * Name: ldb
+ *
+ * Component: ldb utf8 handling
+ *
+ * Description: case folding and case comparison for UTF8 strings
+ *
+ * Author: Andrew Tridgell
+ */
+
+#include "ldb_private.h"
+#include "system/locale.h"
+
+
+/*
+ this allow the user to pass in a caseless comparison
+ function to handle utf8 caseless comparisons
+ */
+void ldb_set_utf8_fns(struct ldb_context *ldb,
+ void *context,
+ char *(*casefold)(void *, void *, const char *, size_t))
+{
+ if (context)
+ ldb->utf8_fns.context = context;
+ if (casefold)
+ ldb->utf8_fns.casefold = casefold;
+}
+
+/*
+ a simple case folding function
+ NOTE: does not handle UTF8
+*/
+char *ldb_casefold_default(void *context, TALLOC_CTX *mem_ctx, const char *s, size_t n)
+{
+ size_t i;
+ char *ret = talloc_strndup(mem_ctx, s, n);
+ if (!s) {
+ errno = ENOMEM;
+ return NULL;
+ }
+ for (i=0;ret[i];i++) {
+ ret[i] = ldb_ascii_toupper((unsigned char)ret[i]);
+ }
+ return ret;
+}
+
+void ldb_set_utf8_default(struct ldb_context *ldb)
+{
+ ldb_set_utf8_fns(ldb, NULL, ldb_casefold_default);
+}
+
+char *ldb_casefold(struct ldb_context *ldb, TALLOC_CTX *mem_ctx, const char *s, size_t n)
+{
+ return ldb->utf8_fns.casefold(ldb->utf8_fns.context, mem_ctx, s, n);
+}
+
+/*
+ check the attribute name is valid according to rfc2251
+ returns 1 if the name is ok
+ */
+
+int ldb_valid_attr_name(const char *s)
+{
+ size_t i;
+
+ if (!s || !s[0])
+ return 0;
+
+ /* handle special ldb_tdb wildcard */
+ if (strcmp(s, "*") == 0) return 1;
+
+ for (i = 0; s[i]; i++) {
+ if (! isascii(s[i])) {
+ return 0;
+ }
+ if (i == 0) { /* first char must be an alpha (or our special '@' identifier) */
+ if (! (isalpha(s[i]) || (s[i] == '@'))) {
+ return 0;
+ }
+ } else {
+ if (! (isalnum(s[i]) || (s[i] == '-'))) {
+ return 0;
+ }
+ }
+ }
+ return 1;
+}
+
+char *ldb_attr_casefold(TALLOC_CTX *mem_ctx, const char *s)
+{
+ size_t i;
+ char *ret = talloc_strdup(mem_ctx, s);
+ if (!ret) {
+ errno = ENOMEM;
+ return NULL;
+ }
+ for (i = 0; ret[i]; i++) {
+ ret[i] = ldb_ascii_toupper((unsigned char)ret[i]);
+ }
+ return ret;
+}
+
+/*
+ we accept either 'dn' or 'distinguishedName' for a distinguishedName
+*/
+int ldb_attr_dn(const char *attr)
+{
+ if (ldb_attr_cmp(attr, "dn") == 0 ||
+ ldb_attr_cmp(attr, "distinguishedName") == 0) {
+ return 0;
+ }
+ return -1;
+}
+
+_PRIVATE_ char ldb_ascii_toupper(char c) {
+ return ('a' <= c && c <= 'z') ? c ^ 0x20 : toupper(c);
+}