Go back end +ios end +android end of AES256 encryption Scheme (Android side)

This is a creation in Article, where the information may have evolved or changed.

The mobile-to-server communication requires AES 256 encryption.

The implementation code for the Androd client is:

Import Android.util.base64;import Java.io.unsupportedencodingexception;import Java.security.key;import Java.security.messagedigest;import Java.security.nosuchalgorithmexception;import Javax.crypto.Cipher;import    Javax.crypto.spec.secretkeyspec;public class Aesencrypt {private static final String Key_algorithm = "AES";    private static final String Cipher_algorithm = "aes/ecb/pkcs7padding";            public static string Encrypt (string key, String data) {try {final key KeySpec = CreateKey (key);            Final Cipher Cipher = cipher.getinstance (Cipher_algorithm, "BC");            Cipher.init (Cipher.encrypt_mode, KeySpec);            Final byte[] encoded = cipher.dofinal (Data.getbytes ("UTF-8"));        return base64.encodetostring (encoded, base64.default);        } catch (Exception e) {e.printstacktrace ();    } return null; } public static string decrypt (string key, String data) {try {final key keySpec = CreateKey (key);            Final Cipher Cipher = cipher.getinstance (cipher_algorithm);            Cipher.init (Cipher.decrypt_mode, KeySpec);            Final byte[] bytes = Base64.decode (data.getbytes ("UTF-8"), Base64.default);        return new String (cipher.dofinal (bytes));        } catch (Exception e) {e.printstacktrace ();    } return null;  } private static Key CreateKey (String Key) throws Unsupportedencodingexception, NoSuchAlgorithmException {final        MessageDigest digest = messagedigest.getinstance ("SHA-256");        Final byte[] Keybyte = Digest.digest (Key.getbytes ("UTF-8"));    return new Secretkeyspec (Keybyte, key_algorithm); }}

Encrypted results are converted to strings by Base64.default