/**
* Frida script bundler — concatenates vendored scripts with config substitution.
*
* Reads scripts from vendor/ directory, replaces config tokens, and returns
* a single combined script string ready for Frida injection.
*/
import { readFileSync } from "node:fs";
import { join, dirname } from "node:path";
import { fileURLToPath } from "node:url";
const __dirname = dirname(fileURLToPath(import.meta.url));
const VENDOR_DIR = join(__dirname, "vendor");
/** Script load order — config must be first. */
const SCRIPT_FILES = [
"config-template.js",
"native-connect-hook.js",
"native-tls-hook.js",
"android-proxy-override.js",
"android-system-certificate-injection.js",
"android-certificate-unpinning.js",
];
export interface BundleConfig {
proxyHost: string;
proxyPort: number;
certPem: string;
}
/**
* Build a combined Frida script with config values substituted.
*
* @param config - Proxy host, port, and cert PEM to inject into the config template.
* @param extraScripts - Additional script content to append (e.g., custom hooks).
*/
export function buildFridaBundle(config: BundleConfig, extraScripts?: string[]): string {
const parts: string[] = [];
for (const file of SCRIPT_FILES) {
let content: string;
try {
content = readFileSync(join(VENDOR_DIR, file), "utf-8");
} catch {
// Skip missing scripts (e.g., optional hooks)
continue;
}
// Substitute config tokens in the template
if (file === "config-template.js") {
content = content
.replace("{{PROXY_HOST}}", config.proxyHost)
.replace("{{PROXY_PORT}}", String(config.proxyPort))
.replace("{{CERT_PEM}}", config.certPem.replace(/`/g, "\\`"));
}
parts.push(`// === ${file} ===`);
parts.push(content);
parts.push("");
}
if (extraScripts) {
for (const script of extraScripts) {
parts.push("// === custom ===");
parts.push(script);
parts.push("");
}
}
return parts.join("\n");
}
