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..0d2b8f5
--- /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
+ * embeded ( ) * 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;
+}