summaryrefslogtreecommitdiff
path: root/lib/ldb/common/ldb_utf8.c
blob: 55d8f905d35c9cb222935098650b3aa431cbb558 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
/* 
   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] = 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] = 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;
}