Initialize encryption and JavaScript reverse-engineering study repository

Document the project structure and setup while excluding local dependencies and IDE settings.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

非对称加密-2026-08-31/实战案例-中国观鸟记录中心/参数加密.js

@@ -0,0 +1,51 @@
+const JSEncrypt = require("jsencrypt");
+var crypto_js = require("crypto-js");
+
+const encrypt = new JSEncrypt();
+var paramPublicKey = "MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCvxXa98E1uWXnBzXkS2yHUfnBM6n3PCwLdfIox03T91joBvjtoDqiQ5x3tTOfpHs3LtiqMMEafls6b0YWtgB1dse1W5m+FpeusVkCOkQxB4SZDH6tuerIknnmB/Hsq5wgEkIvO5Pff9biig6AyoAkdWpSek/1/B7zYIepYY0lxKQIDAQAB";
+encrypt.setPublicKey(paramPublicKey);
+
+function MD5(text) {
+    return crypto_js.MD5(text).toString();
+}
+
+function getUuid() {
+    var s = [];
+    var hexDigits = "0123456789abcdef";
+    for (var i = 0; i < 32; i++) {
+        s[i] = hexDigits.substr(Math.floor(Math.random() * 16), 1)
+    }
+    s[14] = "4";
+    s[19] = hexDigits.substr(s[19] & 3 | 8, 1);
+    s[8] = s[13] = s[18] = s[23];
+    var uuid = s.join("");
+    return uuid
+}
+
+function beforeSend(page) {
+    var timestamp = Date.parse(new Date);
+    var requestId = getUuid();
+
+    var data = `{"limit":"20","page":"${page}"}`
+    const sign = MD5(data + requestId + timestamp)
+    return {
+        timestamp: timestamp,
+        requestId: requestId,
+        sign: sign,
+        data: encrypt.encrypt(data)
+    };
+}
+
+
+function aes_decrypt(encrypt_data) {
+    var key = crypto_js.enc.Utf8.parse("C8EB5514AF5ADDB94B2207B08C66601C");
+    var iv = crypto_js.enc.Utf8.parse("55DD79C6F04E1A67");
+    var decrypted = crypto_js.AES.decrypt(encrypt_data, key, {
+        iv: iv,
+        mode: crypto_js.mode.CBC,
+        padding: crypto_js.pad.Pkcs7,
+    })
+    return decrypted.toString(crypto_js.enc.Utf8);
+}
+
+// console.log(beforeSend(1));