C#: Re-factor TaintedPath to use the new API.

Author: michaelnebel

csharp/ql/lib/semmle/code/csharp/security/dataflow/TaintedPathQuery.qll

@@ -26,9 +26,11 @@ abstract class Sink extends DataFlow::ExprNode { }
 abstract class Sanitizer extends DataFlow::ExprNode { }
 
 /**
+ * DEPRECATED: Use `TaintedPath` instead.
+ *
  * A taint-tracking configuration for uncontrolled data in path expression vulnerabilities.
  */
-class TaintTrackingConfiguration extends TaintTracking::Configuration {
+deprecated class TaintTrackingConfiguration extends TaintTracking::Configuration {
   TaintTrackingConfiguration() { this = "TaintedPath" }
 
   override predicate isSource(DataFlow::Node source) { source instanceof Source }
@@ -38,6 +40,22 @@ class TaintTrackingConfiguration extends TaintTracking::Configuration {
   override predicate isSanitizer(DataFlow::Node node) { node instanceof Sanitizer }
 }
 
+/**
+ * A taint-tracking configuration for uncontrolled data in path expression vulnerabilities.
+ */
+private module TaintedPathConfig implements DataFlow::ConfigSig {
+  predicate isSource(DataFlow::Node source) { source instanceof Source }
+
+  predicate isSink(DataFlow::Node sink) { sink instanceof Sink }
+
+  predicate isBarrier(DataFlow::Node node) { node instanceof Sanitizer }
+}
+
+/**
+ * A taint-tracking module for uncontrolled data in path expression vulnerabilities.
+ */
+module TaintedPath = TaintTracking::Global<TaintedPathConfig>;
+
 /** A source of remote user input. */
 class RemoteSource extends Source instanceof RemoteFlowSource { }
 

csharp/ql/src/Security Features/CWE-022/TaintedPath.ql

@@ -16,9 +16,9 @@
 
 import csharp
 import semmle.code.csharp.security.dataflow.TaintedPathQuery
-import semmle.code.csharp.dataflow.DataFlow::DataFlow::PathGraph
+import TaintedPath::PathGraph
 
-from TaintTrackingConfiguration c, DataFlow::PathNode source, DataFlow::PathNode sink
-where c.hasFlowPath(source, sink)
+from TaintedPath::PathNode source, TaintedPath::PathNode sink
+where TaintedPath::flowPath(source, sink)
 select sink.getNode(), source, sink, "This path depends on a $@.", source.getNode(),
   "user-provided value"