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先来个C#版的: public class DESHelper { /// <summary> /// DES加密算法 /// </summary> /// <param name="encryptString">要加密的字符串</param> /// <param name="sKey">加密码Key</param> /// <returns>正确返回加密后的结果,错误返回源字符串</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 默认的是ECB模式,PKCS5padding;c#默认的CBC模式,PKCS7padding 所以这里我们默认使用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解密算法 /// </summary> /// <param name="decryptString">要解密的字符串</param> /// <param name="sKey">加密Key</param> /// <returns>正确返回加密后的结果,错误返回源字符串</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 默认的是ECB模式,PKCS5padding;c#默认的CBC模式,PKCS7padding 所以这里我们默认使用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()); } }
再来个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; } }
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