add SendUsrChk and test it

.mocharc.json

@@ -0,0 +1,8 @@
+{
+  "extensions": ["ts", "js"],
+  "node-option": [
+    "experimental-specifier-resolution=node",
+    "loader=ts-node/esm"
+  ]
+}
+

Makefile

@@ -1,4 +1,4 @@
-.PHONY: run install-wireshark-dissector
+.PHONY: run install-wireshark-dissector test
 
 bundle.js: asd.js func_replacements.js
 	~/node_modules/.bin/frida-compile -o $@ asd.js
@@ -11,6 +11,12 @@ venv: requirements.txt
 run: bundle.js venv
 	./venv/bin/python3 -u loader3.py
 
+node_modules:
+	npm install
+
+test: node_modules
+	./node_modules/.bin/mocha --require ts-node/register  tests/fn.test.js
+
 install-wireshark-dissector:
 	mkdir -p ~/.local/lib/wireshark/plugins
 	ln -s $(PWD)/dissector.lua ~/.local/lib/wireshark/plugins/dissector.lua

impl.ts

@@ -7,7 +7,7 @@ const str2byte = (s: string): number[] => {
   return Array.from(s).map((_, i) => s.charCodeAt(i));
 };
 
-const SendUsrChk = (username: string, password: string): DataView => {
+export const SendUsrChk = (username: string, password: string): DataView => {
   // type is char account[0x20]; char password[0x80];
   let buf = new Uint8Array(0x20 + 0x80);
   buf.fill(0);
@@ -40,4 +40,4 @@ const SendUsrChk = (username: string, password: string): DataView => {
   return retret;
 };
 
-console.log(hexdump(SendUsrChk("admin", "admin").buffer, { ansi: true }));
+//console.log(hexdump(SendUsrChk("admin", "admin").buffer, { ansi: true }));

tests/fn.test.js

@@ -1,9 +1,10 @@
-import "../shim.js";
+import "../shim.ts";
 
 import assert from "assert";
 
 import { placeholderTypes, sprintf } from "../utils.js";
 import { XqBytesDec, XqBytesEnc } from "../func_replacements.js";
+import { SendUsrChk } from "../impl.ts";
 
 describe("debug_tools", () => {
   it("parses printed data", () => {
@@ -89,3 +90,13 @@ describe("module", () => {
     assert.deepEqual(new Uint8Array(in_buf.buffer), long_dec_bytes); //DEC
   });
 });
+
+const hstrToBA = (hs) => new Uint8Array(hs.match(/../g).map((h) => parseInt(h, 16))).buffer;
+describe("make packet", () => {
+  it("builds a good SendUsrChk", () => {
+    const expected_str =
+      "f1d000b0d1000000110a2010a400ff00000000006f01010101010101010101010101010101010101010101010101010160656c686f01010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010160656c68";
+    const expected = hstrToBA(expected_str);
+    assert.deepEqual(SendUsrChk("admin", "admin").buffer, expected);
+  });
+});