first commit

app/utils/decode.ts

@@ -0,0 +1,64 @@
+import CryptoES from 'crypto-es';
+
+const decrypt = function (ciphertext: string, iv: string, t: number): string {
+    try {
+        const key = generateKey(t);
+        const decrypted = CryptoES.AES.decrypt(ciphertext, CryptoES.enc.Utf8.parse(key), {
+            iv: CryptoES.enc.Hex.parse(iv),
+            mode: CryptoES.mode.CBC,
+            padding: CryptoES.pad.Pkcs7
+        });
+        const dec = CryptoES.enc.Utf8.stringify(decrypted).toString();
+        return dec;
+    } catch (error) {
+        console.error("Decryption failed", error);
+        throw error;
+    }
+};
+
+function h(charArray: string[], modifier: number): string {
+    const uniqueChars = Array.from(new Set(charArray));
+    const numericModifier = Number(modifier.toString().slice(7));
+    const transformedString = uniqueChars.map(char => {
+        const charCode = char.charCodeAt(0);
+        let newCharCode = Math.abs(charCode - (numericModifier % 127) - 1);
+        if (newCharCode < 33) {
+            newCharCode += 33;
+        }
+        return String.fromCharCode(newCharCode);
+    }).join("");
+
+    return transformedString;
+}
+
+function getParams(t: number): Record<string, string | number> {
+    return {
+        'akv': '2.8.1496',  // apk_version_name 版本号 
+        'apv': '1.3.6', // 内部版本号
+        'b': 'XiaoMi', // 手机品牌
+        'd': 'e87a4d5f4f28d7a17d73c524eaa8ac37', // 设备id 可随机生成
+        'm': '23046RP50C', // 手机型号
+        'mac': '',  // mac地址 
+        'n': '23046RP50C',  // 手机型号
+        't': t,  // 时间戳
+        'wifiMac': '020000000000',  // wifiMac地址
+    };
+}
+
+const generateKey = function (t: number): string {
+    const params = getParams(t);
+    const sortedKeys = Object.keys(params).sort();
+    let concatenatedParams = "";
+
+    sortedKeys.forEach(key => {
+        if (key !== "t") {
+            concatenatedParams += params[key];
+        }
+    });
+
+    const keyArray = concatenatedParams.split("");
+    const hashedKey = h(keyArray, t);
+    return CryptoES.MD5(hashedKey).toString(CryptoES.enc.Hex);
+};
+
+export { decrypt, getParams };