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-rw-r--r--source3/lib/ldap_escape.c137
1 files changed, 137 insertions, 0 deletions
diff --git a/source3/lib/ldap_escape.c b/source3/lib/ldap_escape.c
new file mode 100644
index 0000000..b44662c
--- /dev/null
+++ b/source3/lib/ldap_escape.c
@@ -0,0 +1,137 @@
+/*
+ Unix SMB/CIFS implementation.
+ ldap filter argument escaping
+
+ Copyright (C) 1998, 1999, 2000 Luke Howard <lukeh@padl.com>,
+ Copyright (C) 2003 Andrew Bartlett <abartlet@samba.org>
+
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ This program 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 General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "includes.h"
+
+/**
+ * Escape a parameter to an LDAP filter string, so they cannot contain
+ * embedded ( ) * or \ chars which may cause it not to parse correctly.
+ *
+ * @param s The input string
+ *
+ * @return A string allocated with talloc(), containing the escaped string,
+ * and to be talloc_free()ed by the caller.
+ **/
+
+char *escape_ldap_string(TALLOC_CTX *mem_ctx, const char *s)
+{
+ size_t len = strlen(s)+1;
+ char *output = talloc_array(mem_ctx, char, len);
+ const char *sub;
+ int i = 0;
+ char *p = output;
+
+ if (output == NULL) {
+ return NULL;
+ }
+
+ while (*s)
+ {
+ switch (*s)
+ {
+ case '*':
+ sub = "\\2a";
+ break;
+ case '(':
+ sub = "\\28";
+ break;
+ case ')':
+ sub = "\\29";
+ break;
+ case '\\':
+ sub = "\\5c";
+ break;
+ default:
+ sub = NULL;
+ break;
+ }
+
+ if (sub) {
+ char *tmp;
+ len = len + 3;
+ tmp = talloc_realloc(mem_ctx, output, char, len);
+ if (tmp == NULL) {
+ TALLOC_FREE(output);
+ return NULL;
+ }
+ output = tmp;
+
+ p = &output[i];
+ memcpy(p, sub, 3);
+ p += 3;
+ i += 3;
+
+ } else {
+ *p = *s;
+ p++;
+ i++;
+ }
+ s++;
+ }
+
+ *p = '\0';
+ return output;
+}
+
+char *escape_rdn_val_string_alloc(const char *s)
+{
+ char *output, *p;
+
+ /* The maximum size of the escaped string can be twice the actual size */
+ output = (char *)SMB_MALLOC(2*strlen(s) + 1);
+
+ if (output == NULL) {
+ return NULL;
+ }
+
+ p = output;
+
+ while (*s)
+ {
+ switch (*s)
+ {
+ case ',':
+ case '=':
+ case '+':
+ case '<':
+ case '>':
+ case '#':
+ case ';':
+ case '\\':
+ case '\"':
+ *p++ = '\\';
+ *p++ = *s;
+ break;
+ default:
+ *p = *s;
+ p++;
+ }
+
+ s++;
+ }
+
+ *p = '\0';
+
+ /* resize the string to the actual final size */
+ output = (char *)SMB_REALLOC(output, strlen(output) + 1);
+ return output;
+}