1/* 2 ldb database library 3 4 Copyright (C) Andrew Tridgell 2004 5 6 ** NOTE! The following LGPL license applies to the ldb 7 ** library. This does NOT imply that all of Samba is released 8 ** under the LGPL 9 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. 14 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. 19 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/>. 22*/ 23 24/* 25 * Name: ldb 26 * 27 * Component: ldb utf8 handling 28 * 29 * Description: case folding and case comparison for UTF8 strings 30 * 31 * Author: Andrew Tridgell 32 */ 33 34#include "ldb_private.h" 35#include "system/locale.h" 36 37 38/* 39 this allow the user to pass in a caseless comparison 40 function to handle utf8 caseless comparisons 41 */ 42void ldb_set_utf8_fns(struct ldb_context *ldb, 43 void *context, 44 char *(*casefold)(void *, void *, const char *, size_t)) 45{ 46 if (context) 47 ldb->utf8_fns.context = context; 48 if (casefold) 49 ldb->utf8_fns.casefold = casefold; 50} 51 52/* 53 a simple case folding function 54 NOTE: does not handle UTF8 55*/ 56char *ldb_casefold_default(void *context, void *mem_ctx, const char *s, size_t n) 57{ 58 int i; 59 char *ret = talloc_strndup(mem_ctx, s, n); 60 if (!s) { 61 errno = ENOMEM; 62 return NULL; 63 } 64 for (i=0;ret[i];i++) { 65 ret[i] = toupper((unsigned char)ret[i]); 66 } 67 return ret; 68} 69 70void ldb_set_utf8_default(struct ldb_context *ldb) 71{ 72 ldb_set_utf8_fns(ldb, NULL, ldb_casefold_default); 73} 74 75char *ldb_casefold(struct ldb_context *ldb, void *mem_ctx, const char *s, size_t n) 76{ 77 return ldb->utf8_fns.casefold(ldb->utf8_fns.context, mem_ctx, s, n); 78} 79 80/* 81 check the attribute name is valid according to rfc2251 82 returns 1 if the name is ok 83 */ 84 85int ldb_valid_attr_name(const char *s) 86{ 87 int i; 88 89 if (!s || !s[0]) 90 return 0; 91 92 /* handle special ldb_tdb wildcard */ 93 if (strcmp(s, "*") == 0) return 1; 94 95 for (i = 0; s[i]; i++) { 96 if (! isascii(s[i])) { 97 return 0; 98 } 99 if (i == 0) { /* first char must be an alpha (or our special '@' identifier) */ 100 if (! (isalpha(s[i]) || (s[i] == '@'))) { 101 return 0; 102 } 103 } else { 104 if (! (isalnum(s[i]) || (s[i] == '-'))) { 105 return 0; 106 } 107 } 108 } 109 return 1; 110} 111 112char *ldb_attr_casefold(void *mem_ctx, const char *s) 113{ 114 int i; 115 char *ret = talloc_strdup(mem_ctx, s); 116 if (!ret) { 117 errno = ENOMEM; 118 return NULL; 119 } 120 for (i = 0; ret[i]; i++) { 121 ret[i] = toupper((unsigned char)ret[i]); 122 } 123 return ret; 124} 125 126/* 127 we accept either 'dn' or 'distinguishedName' for a distinguishedName 128*/ 129int ldb_attr_dn(const char *attr) 130{ 131 if (ldb_attr_cmp(attr, "dn") == 0 || 132 ldb_attr_cmp(attr, "distinguishedName") == 0) { 133 return 0; 134 } 135 return -1; 136} 137