C# Java DES加密解密

先來個C#版的：

 public class DESHelper    {        /// <summary>        /// DES密碼編譯演算法        /// </summary>        /// <param name="encryptString">要加密的字串</param>        /// <param name="sKey">加密碼Key</param>        /// <returns>正確返回加密後的結果，錯誤返回源字串</returns>        public static string ToDESEncrypt(string encryptString, string sKey)        {            try            {                byte[] keyBytes = Encoding.UTF8.GetBytes(sKey);                byte[] keyIV = keyBytes;                byte[] inputByteArray = Encoding.UTF8.GetBytes(encryptString);                DESCryptoServiceProvider desProvider = new DESCryptoServiceProvider();                // java 預設的是ECB模式，PKCS5padding；c#預設的CBC模式，PKCS7padding 所以這裡我們預設使用ECB方式                desProvider.Mode = CipherMode.ECB;                MemoryStream memStream = new MemoryStream();                CryptoStream crypStream = new CryptoStream(memStream, desProvider.CreateEncryptor(keyBytes, keyIV), CryptoStreamMode.Write);                crypStream.Write(inputByteArray, 0, inputByteArray.Length);                crypStream.FlushFinalBlock();                return Convert.ToBase64String(memStream.ToArray());            }            catch            {                return encryptString;            }        }        /// <summary>        /// DES解密演算法        /// </summary>        /// <param name="decryptString">要解密的字串</param>        /// <param name="sKey">加密Key</param>        /// <returns>正確返回加密後的結果，錯誤返回源字串</returns>        public static string ToDESDecrypt(string decryptString, string sKey)        {            byte[] keyBytes = Encoding.UTF8.GetBytes(sKey);            byte[] keyIV = keyBytes;            byte[] inputByteArray = Convert.FromBase64String(decryptString);            DESCryptoServiceProvider desProvider = new DESCryptoServiceProvider();            // java 預設的是ECB模式，PKCS5padding；c#預設的CBC模式，PKCS7padding 所以這裡我們預設使用ECB方式            desProvider.Mode = CipherMode.ECB;            MemoryStream memStream = new MemoryStream();            CryptoStream crypStream = new CryptoStream(memStream, desProvider.CreateDecryptor(keyBytes, keyIV), CryptoStreamMode.Write);            crypStream.Write(inputByteArray, 0, inputByteArray.Length);            crypStream.FlushFinalBlock();            return Encoding.Default.GetString(memStream.ToArray());        }    }

 

再來個Java版的

public class DESHelper {private byte[] desKey;public DES(String desKey) {this.desKey = desKey.getBytes();}public byte[] desEncrypt(byte[] plainText) throws Exception {SecureRandom sr = new SecureRandom();byte rawKeyData[] = desKey;DESKeySpec dks = new DESKeySpec(rawKeyData);SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");SecretKey key = keyFactory.generateSecret(dks);Cipher cipher = Cipher.getInstance("DES");cipher.init(Cipher.ENCRYPT_MODE, key, sr);byte data[] = plainText;byte encryptedData[] = cipher.doFinal(data);return encryptedData;}public byte[] desDecrypt(byte[] encryptText) throws Exception {SecureRandom sr = new SecureRandom();byte rawKeyData[] = desKey;DESKeySpec dks = new DESKeySpec(rawKeyData);SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");SecretKey key = keyFactory.generateSecret(dks);Cipher cipher = Cipher.getInstance("DES");cipher.init(Cipher.DECRYPT_MODE, key, sr);byte encryptedData[] = encryptText;byte decryptedData[] = cipher.doFinal(encryptedData);return decryptedData;}public String encrypt(String input) throws Exception {return base64Encode(desEncrypt(input.getBytes()));}public String decrypt(String input) throws Exception {byte[] result = base64Decode(input);return new String(desDecrypt(result));}public static String base64Encode(byte[] s) {if (s == null)return null;BASE64Encoder b = new sun.misc.BASE64Encoder();return b.encode(s);}public static byte[] base64Decode(String s) throws IOException {if (s == null)return null;BASE64Decoder decoder = new BASE64Decoder();byte[] b = decoder.decodeBuffer(s);return b;}}