[pitboss/grind] deferred session-0017 (20260522T163126Z-7d60)

src/dynamic/framework/adapters/data_exfil_java.rs

@@ -0,0 +1,228 @@
+//! Java [`super::super::FrameworkAdapter`] matching outbound-HTTP
+//! sink constructions (`java.net.HttpURLConnection`, the modern
+//! `java.net.http.HttpClient`, OkHttp, Apache HttpClient).
+//!
+//! Phase 11 (Track L.9).  Fires when the function body invokes one
+//! of the canonical Java HTTP-client entry points and the surrounding
+//! source imports the matching stdlib / third-party module.
+//!
+//! See sibling adapters
+//! [`super::data_exfil_python::DataExfilPythonAdapter`],
+//! [`super::data_exfil_js::DataExfilJsAdapter`],
+//! [`super::data_exfil_go::DataExfilGoAdapter`], and
+//! [`super::data_exfil_ruby::DataExfilRubyAdapter`] for the same
+//! shape on other languages.
+
+use crate::dynamic::framework::{FrameworkAdapter, FrameworkBinding};
+use crate::evidence::EntryKind;
+use crate::summary::FuncSummary;
+use crate::symbol::Lang;
+
+pub struct DataExfilJavaAdapter;
+
+const ADAPTER_NAME: &str = "data-exfil-java";
+
+fn callee_is_outbound_http(name: &str) -> bool {
+    let last = name.rsplit_once('.').map(|(_, s)| s).unwrap_or(name);
+    matches!(
+        last,
+        "openConnection"
+            | "openStream"
+            | "send"
+            | "sendAsync"
+            | "execute"
+            | "newCall"
+            | "newBuilder"
+            | "build"
+            | "connect"
+    ) || matches!(
+        name,
+        "java.net.URL.openConnection"
+            | "java.net.URL.openStream"
+            | "URL.openConnection"
+            | "URL.openStream"
+            | "HttpClient.send"
+            | "HttpClient.sendAsync"
+            | "HttpClient.newHttpClient"
+            | "HttpRequest.newBuilder"
+            | "OkHttpClient.newCall"
+            | "Call.execute"
+            | "HttpClients.createDefault"
+            | "CloseableHttpClient.execute"
+            | "Request.Builder.url"
+    )
+}
+
+fn source_imports_java_http_client(file_bytes: &[u8]) -> bool {
+    const NEEDLES: &[&[u8]] = &[
+        b"java.net.HttpURLConnection",
+        b"java.net.URL",
+        b"java.net.http.HttpClient",
+        b"java.net.http.HttpRequest",
+        b"okhttp3.OkHttpClient",
+        b"okhttp3.Request",
+        b"okhttp3.Call",
+        b"org.apache.http.client.HttpClient",
+        b"org.apache.http.impl.client.HttpClients",
+        b"org.apache.http.impl.client.CloseableHttpClient",
+        b"org.apache.hc.client5.http",
+    ];
+    NEEDLES
+        .iter()
+        .any(|n| file_bytes.windows(n.len()).any(|w| w == *n))
+}
+
+/// Returns `true` when the surrounding source visibly routes the
+/// outbound URL through a host-allowlist / network-policy gate.
+fn host_routed_through_allowlist(file_bytes: &[u8]) -> bool {
+    const NEEDLES: &[&[u8]] = &[
+        b"ALLOWLIST",
+        b"ALLOWED_HOSTS",
+        b"allowedHosts",
+        b"allowlist",
+        b"\"127.0.0.1\"",
+        b"\"localhost\"",
+        b".equals(\"localhost\")",
+        b".contains(host)",
+        b".containsKey(host)",
+    ];
+    NEEDLES
+        .iter()
+        .any(|n| file_bytes.windows(n.len()).any(|w| w == *n))
+}
+
+impl FrameworkAdapter for DataExfilJavaAdapter {
+    fn name(&self) -> &'static str {
+        ADAPTER_NAME
+    }
+
+    fn lang(&self) -> Lang {
+        Lang::Java
+    }
+
+    fn detect(
+        &self,
+        summary: &FuncSummary,
+        _ast: tree_sitter::Node<'_>,
+        file_bytes: &[u8],
+    ) -> Option<FrameworkBinding> {
+        if host_routed_through_allowlist(file_bytes) {
+            return None;
+        }
+        let matches_call = super::any_callee_matches(summary, callee_is_outbound_http);
+        let matches_source = source_imports_java_http_client(file_bytes);
+        if matches_call && matches_source {
+            Some(FrameworkBinding {
+                adapter: ADAPTER_NAME.to_owned(),
+                kind: EntryKind::Function,
+                route: None,
+                request_params: Vec::new(),
+                response_writer: None,
+                middleware: Vec::new(),
+            })
+        } else {
+            None
+        }
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    fn parse_java(src: &[u8]) -> tree_sitter::Tree {
+        let mut parser = tree_sitter::Parser::new();
+        let lang = tree_sitter::Language::from(tree_sitter_java::LANGUAGE);
+        parser.set_language(&lang).unwrap();
+        parser.parse(src, None).unwrap()
+    }
+
+    #[test]
+    fn fires_on_url_open_connection() {
+        let src: &[u8] = b"import java.net.HttpURLConnection;\nimport java.net.URL;\n\
+            public class Vuln {\n    public static void run(String host) throws Exception {\n        URL u = new URL(\"http://\" + host + \"/exfil\");\n        HttpURLConnection conn = (HttpURLConnection) u.openConnection();\n        conn.connect();\n    }\n}\n";
+        let tree = parse_java(src);
+        let summary = FuncSummary {
+            name: "run".into(),
+            callees: vec![crate::summary::CalleeSite::bare("URL.openConnection")],
+            ..Default::default()
+        };
+        assert!(
+            DataExfilJavaAdapter
+                .detect(&summary, tree.root_node(), src)
+                .is_some()
+        );
+    }
+
+    #[test]
+    fn fires_on_httpclient_send() {
+        let src: &[u8] = b"import java.net.http.HttpClient;\nimport java.net.http.HttpRequest;\nimport java.net.URI;\n\
+            public class Vuln {\n    public static void run(String host) throws Exception {\n        HttpClient c = HttpClient.newHttpClient();\n        HttpRequest r = HttpRequest.newBuilder(URI.create(\"http://\" + host)).build();\n        c.send(r, java.net.http.HttpResponse.BodyHandlers.discarding());\n    }\n}\n";
+        let tree = parse_java(src);
+        let summary = FuncSummary {
+            name: "run".into(),
+            callees: vec![
+                crate::summary::CalleeSite::bare("HttpRequest.newBuilder"),
+                crate::summary::CalleeSite::bare("HttpClient.send"),
+            ],
+            ..Default::default()
+        };
+        assert!(
+            DataExfilJavaAdapter
+                .detect(&summary, tree.root_node(), src)
+                .is_some()
+        );
+    }
+
+    #[test]
+    fn fires_on_okhttp_newcall_execute() {
+        let src: &[u8] = b"import okhttp3.OkHttpClient;\nimport okhttp3.Request;\n\
+            public class Vuln {\n    public static void run(String host) throws Exception {\n        OkHttpClient c = new OkHttpClient();\n        Request r = new Request.Builder().url(\"http://\" + host).build();\n        c.newCall(r).execute();\n    }\n}\n";
+        let tree = parse_java(src);
+        let summary = FuncSummary {
+            name: "run".into(),
+            callees: vec![
+                crate::summary::CalleeSite::bare("OkHttpClient.newCall"),
+                crate::summary::CalleeSite::bare("Call.execute"),
+            ],
+            ..Default::default()
+        };
+        assert!(
+            DataExfilJavaAdapter
+                .detect(&summary, tree.root_node(), src)
+                .is_some()
+        );
+    }
+
+    #[test]
+    fn skips_when_host_in_allowlist_literal() {
+        let src: &[u8] = b"import java.net.HttpURLConnection;\nimport java.net.URL;\n\
+            public class Vuln {\n    public static void run(String host) throws Exception {\n        if (!host.equals(\"127.0.0.1\")) { return; }\n        URL u = new URL(\"http://\" + host + \"/exfil\");\n        ((HttpURLConnection) u.openConnection()).connect();\n    }\n}\n";
+        let tree = parse_java(src);
+        let summary = FuncSummary {
+            name: "run".into(),
+            callees: vec![crate::summary::CalleeSite::bare("URL.openConnection")],
+            ..Default::default()
+        };
+        assert!(
+            DataExfilJavaAdapter
+                .detect(&summary, tree.root_node(), src)
+                .is_none()
+        );
+    }
+
+    #[test]
+    fn skips_plain_method() {
+        let src: &[u8] = b"public class Plain { public static int add(int a, int b) { return a + b; } }\n";
+        let tree = parse_java(src);
+        let summary = FuncSummary {
+            name: "add".into(),
+            ..Default::default()
+        };
+        assert!(
+            DataExfilJavaAdapter
+                .detect(&summary, tree.root_node(), src)
+                .is_none()
+        );
+    }
+}