Initial Commit

packages/security-stack/security/tpm-struct/src/extra-data/extra-data.test.ts

@@ -0,0 +1,49 @@
+import { describe, expect, it } from "@suaveplan/testing/runner";
+import { extraDataMatches } from "./extra-data.js";
+
+function bytewise(a: Uint8Array, b: Uint8Array): boolean {
+    if (a.length !== b.length) return false;
+    let acc = 0;
+    for (let i = 0; i < a.length; i++)
+        acc |= (a[i] as number) ^ (b[i] as number);
+    return acc === 0;
+}
+
+describe("extraDataMatches", () => {
+    it("returns true for equal buffers", { timeout: 5000 }, () => {
+        const a = new Uint8Array([1, 2, 3, 4]);
+        const b = new Uint8Array([1, 2, 3, 4]);
+        expect(extraDataMatches(a, b, bytewise)).toBe(true);
+    });
+
+    it("returns false for differing content (same length)", {
+        timeout: 5000,
+    }, () => {
+        const a = new Uint8Array([1, 2, 3, 4]);
+        const b = new Uint8Array([1, 2, 3, 5]);
+        expect(extraDataMatches(a, b, bytewise)).toBe(false);
+    });
+
+    it("returns false on length mismatch without calling equal", {
+        timeout: 5000,
+    }, () => {
+        let called = false;
+        const fn = () => {
+            called = true;
+            return true;
+        };
+        const out = extraDataMatches(
+            new Uint8Array([1, 2, 3]),
+            new Uint8Array([1, 2]),
+            fn
+        );
+        expect(out).toBe(false);
+        expect(called).toBe(false);
+    });
+
+    it("returns true on empty buffers", { timeout: 5000 }, () => {
+        expect(
+            extraDataMatches(new Uint8Array(0), new Uint8Array(0), bytewise)
+        ).toBe(true);
+    });
+});