[pitboss] phase 08: Track J.6 + Track L.6 — HEADER_INJECTION corpus + every HTTP framework

src/dynamic/framework/adapters/header_go.rs

@@ -0,0 +1,110 @@
+//! Go [`super::super::FrameworkAdapter`] matching HTTP response-
+//! header CRLF-injection sink constructions
+//! (`http.ResponseWriter.Header().Set` / `Add`, Gin `c.Header`,
+//! Echo `c.Response().Header().Set`).
+//!
+//! Phase 08 (Track J.6).  Fires when the function body invokes one
+//! of the canonical Go HTTP response writers and the surrounding
+//! source imports `net/http` or one of the supported frameworks.
+
+use crate::dynamic::framework::{FrameworkAdapter, FrameworkBinding};
+use crate::evidence::EntryKind;
+use crate::summary::FuncSummary;
+use crate::symbol::Lang;
+
+pub struct HeaderGoAdapter;
+
+const ADAPTER_NAME: &str = "header-go";
+
+fn callee_is_header_setter(name: &str) -> bool {
+    let last = name.rsplit_once('.').map(|(_, s)| s).unwrap_or(name);
+    matches!(last, "Set" | "Add" | "Header" | "WriteHeader")
+}
+
+fn source_imports_go_http(file_bytes: &[u8]) -> bool {
+    const NEEDLES: &[&[u8]] = &[
+        b"\"net/http\"",
+        b"net/http\"",
+        b"github.com/gin-gonic/gin",
+        b"github.com/labstack/echo",
+        b"github.com/gofiber/fiber",
+        b"github.com/go-chi/chi",
+        b".Header().Set",
+        b".Header().Add",
+    ];
+    NEEDLES
+        .iter()
+        .any(|n| file_bytes.windows(n.len()).any(|w| w == *n))
+}
+
+impl FrameworkAdapter for HeaderGoAdapter {
+    fn name(&self) -> &'static str {
+        ADAPTER_NAME
+    }
+
+    fn lang(&self) -> Lang {
+        Lang::Go
+    }
+
+    fn detect(
+        &self,
+        summary: &FuncSummary,
+        _ast: tree_sitter::Node<'_>,
+        file_bytes: &[u8],
+    ) -> Option<FrameworkBinding> {
+        let matches_call = super::any_callee_matches(summary, callee_is_header_setter);
+        let matches_source = source_imports_go_http(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_go(src: &[u8]) -> tree_sitter::Tree {
+        let mut parser = tree_sitter::Parser::new();
+        let lang = tree_sitter::Language::from(tree_sitter_go::LANGUAGE);
+        parser.set_language(&lang).unwrap();
+        parser.parse(src, None).unwrap()
+    }
+
+    #[test]
+    fn fires_on_header_set() {
+        let src: &[u8] =
+            b"package x\nimport \"net/http\"\nfunc Run(w http.ResponseWriter, v string) { w.Header().Set(\"Set-Cookie\", v) }\n";
+        let tree = parse_go(src);
+        let summary = FuncSummary {
+            name: "Run".into(),
+            callees: vec![crate::summary::CalleeSite::bare("Set")],
+            ..Default::default()
+        };
+        assert!(HeaderGoAdapter
+            .detect(&summary, tree.root_node(), src)
+            .is_some());
+    }
+
+    #[test]
+    fn skips_plain_function() {
+        let src: &[u8] = b"package x\nfunc Add(a, b int) int { return a + b }\n";
+        let tree = parse_go(src);
+        let summary = FuncSummary {
+            name: "Add".into(),
+            ..Default::default()
+        };
+        assert!(HeaderGoAdapter
+            .detect(&summary, tree.root_node(), src)
+            .is_none());
+    }
+}