AES encryption, decryption (Linux, window encryption and decryption effect consistent, support Chinese)

Transferred from: http://sunfish.iteye.com/blog/2169158

Import Java.io.unsupportedencodingexception;import Java.security.invalidkeyexception;import Java.security.nosuchalgorithmexception;import Java.security.securerandom;import javax.crypto.BadPaddingException ; Import Javax.crypto.cipher;import Javax.crypto.illegalblocksizeexception;import Javax.crypto.keygenerator;import Javax.crypto.nosuchpaddingexception;import Javax.crypto.secretkey;import Javax.crypto.spec.secretkeyspec;import            Org.apache.axis.encoding.base64;public class AES {private static int length=128;/** * Encrypt * * @param content * What you need to encrypt * @param password * Encryption password * @return * @throws nosuchalgorithmexception * @throws nosuchpaddingexception * @throws unsupportedencodingexception * @throws invalidkeyexception * @throws badpaddingexception * @throws illegalblock Sizeexception */private Static byte[] Encrypt (string content, string password) throws Exception {Keygenerator KGen = KeyGen                Erator.getinstance ("AES"); SecureRandom securerandom = SecureRandom.getinstance ("sha1prng"); Securerandom.setseed (Password.getbytes ()); Kgen.init (length, securerandom); Secretkey Secretkey = Kgen.generatekey (); byte[] Encodeformat = secretkey.getencoded (); Secretkeyspec key = new Secretkeyspec (Encodeformat, "AES"); Cipher Cipher = cipher.getinstance ("AES");//Create cipher byte[] bytecontent = content.getbytes ("Utf-8"); Cipher.init ( Cipher.encrypt_mode, key);//Initialize byte[] result = cipher.dofinal (bytecontent); return result; Encrypt}/** * Decrypt * * @param content * to decrypt contents * @param password * Decryption key * @return */private static byte[                 ] Decrypt (byte[] content, String password) throws Exception {Keygenerator KGen = keygenerator.getinstance ("AES");                   SecureRandom securerandom = securerandom.getinstance ("sha1prng"); Securerandom.setseed (Password.getbytes ()); Kgen.init (length, securerandom); Secretkey Secretkey = Kgen.generatekey (); byte[] Encodeformat = secretkey.getencoded (); Secretkeyspec key = new Secretkeyspec (EnCOdeformat, "AES"); Cipher Cipher = cipher.getinstance ("AES");//Create cipher Cipher.init (Cipher.decrypt_mode, key);//Initialize byte[] result = Cipher.dofinal (content); return result; Encrypt}///**//* Convert binary to 16 binary//*//* @param buf//* @return//*///public static String Parseb YTE2HEXSTR (Byte buf[]) {//stringbuffer sb = new StringBuffer (),//for (int i = 0; i < buf.length; i++) {//string hex = i Nteger.tohexstring (Buf[i] & 0xFF);//if (hex.length () = = 1) {//hex = ' 0 ' + hex;//}//sb.append (hex.touppercase ());//}/ /return sb.tostring ();//}/////**//* Convert 16 binary to binary//*//* @param hexstr//* @return//*///public static byte[] Parsehexstr 2Byte (String hexstr) {//if (Hexstr.length () < 1)//return null;//byte[] result = new Byte[hexstr.length ()/2];//for (in t i = 0; I < Hexstr.length ()/2; i++) {//int high = Integer.parseint (Hexstr.substring (i * 2, I * 2 + 1), and//int low = Integer.parseint (Hexstr.substring ( I * 2 + 1, I * 2 + 2),//16);//result[i] = (byte) (high * + low);//}//return result;//}/** * Encryption * * @param content * requires encrypted contents * @param password * encrypted password * @return */p Ublic Static byte[] Encrypt2 (string content, string password) {try {secretkeyspec key = new Secretkeyspec (password.getbyte S (), "AES"); Cipher Cipher = cipher.getinstance ("aes/ecb/nopadding"); byte[] bytecontent = content.getbytes ("Utf-8"); Cipher.init ( Cipher.encrypt_mode, key);//Initialize byte[] result = cipher.dofinal (bytecontent); return result; Encryption} catch (NoSuchAlgorithmException e) {e.printstacktrace ();} catch (Nosuchpaddingexception e) {e.printstacktrace ();} catch (InvalidKeyException e) {e.printstacktrace ();} catch (Unsupportedencodingexception e) {e.printstacktrace ();} catch (Illegalblocksizeexception e) {e.printstacktrace ();} catch (Badpaddingexception e) {e.printstacktrace ();} return null;} public static string Encrypt2str (string content, string password) throws Exception {byte[] Encryptresult = Encrypt (content , password); return Base64.encode (Encryptresult);} Publicstatic string Decrypt2str (string content, string password) throws Exception {byte[] Decryptresult = Decrypt (base64.decode (content), password); return new String (Decryptresult, "UTF-8");} public static void Main (string[] args) throws Exception {String content = "T sun est"; String password = "12345678";//Encryption System.out.println ("Before encryption:" + content); String tt4 = encrypt2str (content, password); System.out.println (new String (TT4));//Decrypt string d = decrypt2str (tt4, password); System.out.println ("After decryption:" + D);//Before encryption: T Sun est//bpf0jyjdj/pvharf66+oma==//after decryption: T Sun est}}

AES encryption, decryption (Linux, window encryption and decryption effect consistent, support Chinese)