[MEDIUM] restrict the set of allowed characters for identifiers
In order to avoid issues in the future, we want to restrict
the set of allowed characters for identifiers. Starting from
now, only A-Z, a-z, 0-9, '-', '_', '.' and ':' will be allowed
for a proxy, a server or an ACL name.
A test file has been added to check the restriction.
diff --git a/src/standard.c b/src/standard.c
index 0b16296..07aa5e4 100644
--- a/src/standard.c
+++ b/src/standard.c
@@ -10,6 +10,7 @@
*
*/
+#include <ctype.h>
#include <netdb.h>
#include <stdlib.h>
#include <string.h>
@@ -98,6 +99,24 @@
return 0;
}
+/*
+ * Checks <name> for invalid characters. Valid chars are [A-Za-z0-9_:.-]. If an
+ * invalid character is found, a pointer to it is returned. If everything is
+ * fine, NULL is returned.
+ */
+const char *invalid_char(const char *name)
+{
+ if (!*name)
+ return name;
+
+ while (*name) {
+ if (!isalnum(*name) && *name != '.' && *name != ':' &&
+ *name != '_' && *name != '-')
+ return name;
+ name++;
+ }
+ return NULL;
+}
/*
* converts <str> to a struct sockaddr_in* which is locally allocated.