NeteaseDeObfuscation.java

import java.util.Base64;

class Main {
    public static String key = "Encrypt";

    public static void main(String[] args) {
        if (args[0].equals("decrypt")) {
            System.out.println(decrypt(args[1]));;
        }else{
            System.out.println(encrypt(args[1]));
        }
    }

    public static String decrypt(String s) {
        byte[] decode = Base64.getDecoder().decode(s);
        String str2;
        int length = decode.length;
        int length2 = key.length();
        int i = 0;
        int i2 = 0;
        while (true) {
            int i3 = i2;
            if (i >= length) {
                break;
            }
            int i4 = i3;
            if (i3 >= length2) {
                i4 = 0;
            }
            decode[i] = (byte) (decode[i] ^ key.charAt(i4));
            i++;
            i2 = i4 + 1;
        }
        str2 = new String(decode);
        return str2;
    }

    public static String encrypt(String str_enc) {
        byte[] s = str_enc.getBytes();
        int length = str_enc.length();
        int length2 = key.length();
        int i = 0;
        int i2 = 0;
        while (true) {
            int i3 = i2;
            if (i >= length) {
                break;
            }
            int i4 = i3;
            if (i3 >= length2) {
                i4 = 0;
            }
            s[i] = (byte) (s[i] ^ key.charAt(i4));
            i++;
            i2 = i4 + 1;
        }
        return Base64.getEncoder().encodeToString(s);
    }
}