Java和C#利用DES算法加密和解密数据
今天晚上折腾了很久，一直在想， .NET 的 DES算法 加密的数据 JAVA能解吗，看了下 微软的SDK帮助文档,其实就是一个加密算法，只要知道IV和KEY就能解密数据.
C# SDK API地址：
http://msdn.microsoft.com/zh-cn/library/system.security.cryptography.descryptoserviceprovider%28v=VS.80%29.aspx
.NET加密实现(iv我用一个byte数组,值是1-8)
1 2 3 4 5 6 7 8 9 10 11 12 | public static string EncryptDES(string encryptString, string encryptKey) { DESCryptoServiceProvider dCSP = new DESCryptoServiceProvider(); byte[] rgbKey = Encoding.UTF8.GetBytes(encryptKey); byte[] inputByteArray = Encoding.UTF8.GetBytes(encryptString); MemoryStream mStream = new MemoryStream(); CryptoStream cStream = new CryptoStream(mStream, dCSP.CreateEncryptor(rgbKey, new byte[]{1,2,3,4,5,6,6,7,8}), CryptoStreamMode.Write); cStream.Write(inputByteArray, 0, inputByteArray.Length); cStream.FlushFinalBlock(); return Convert.ToBase64String(mStream.ToArray()); } |
.NET解密实现（解密的key和iv一定要一样,否则解密失败）
1 2 3 4 5 6 7 8 9 10 11 | public static string DecryptDES(string decryptString, string decryptKey) { byte[] rgbKey = Encoding.UTF8.GetBytes(decryptKey); byte[] inputByteArray = Convert.FromBase64String(decryptString); DESCryptoServiceProvider DCSP = new DESCryptoServiceProvider(); MemoryStream mStream = new MemoryStream(); CryptoStream cStream = new CryptoStream(mStream, DCSP.CreateDecryptor(rgbKey, new byte[]{1,2,3,4,5,6,6,7,8}), CryptoStreamMode.Write); cStream.Write(inputByteArray, 0, inputByteArray.Length); cStream.FlushFinalBlock(); return Encoding.UTF8.GetString(mStream.ToArray()); } |
下面是JAVA版的
JAVA加密：
1 2 3 4 5 6 7 8 9 | public static String encryptDES(String encryptString, String encryptKey) throws Exception { IvParameterSpec zeroIv = new IvParameterSpec(new byte[8]); SecretKeySpec key = new SecretKeySpec(encryptKey.getBytes(), "DES"); Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding"); cipher.init(Cipher.ENCRYPT_MODE, key, zeroIv); byte[] encryptedData = cipher.doFinal(encryptString.getBytes()); return new BASE64Encoder().encode(encryptedData); } |
java解密：
1 2 3 4 5 6 7 8 9 | public static String decryptDES(String decryptString, String decryptKey) throws Exception { byte[] byteMi = new BASE64Decoder().decodeBuffer(decryptString); IvParameterSpec zeroIv = new IvParameterSpec(new byte[8]); SecretKeySpec key = new SecretKeySpec(decryptKey.getBytes(), "DES"); Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding"); cipher.init(Cipher.DECRYPT_MODE, key, zeroIv); byte decryptedData[] = cipher.doFinal(byteMi); return new String(decryptedData); } |
另外再贴上两个装换工具
java版：
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 | public static byte[] convertHexString(String ss) { byte digest[] = new byte[ss.length() / 2]; for(int i = 0; i < digest.length; i++) { String byteString = ss.substring(2 * i, 2 * i + 2); int byteValue = Integer.parseInt(byteString, 16); digest[i] = (byte)byteValue; } return digest; } public static String toHexString(byte b[]) { StringBuffer hexString = new StringBuffer(); for (int i = 0; i < b.length; i++) { String plainText = Integer.toHexString(0xff & b[i]); if (plainText.length() < 2) plainText = "0" + plainText; hexString.append(plainText); } return hexString.toString(); } |
C#版
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 | private static string ToHexString(string str) { byte[] bytes = Encoding.UTF8.GetBytes(str); string temp = ""; for (int i = 0; i < bytes.Length; i++) { int inttemp = (int)bytes[i]; temp += Convert.ToString((byte)inttemp, 16); } return temp; } private static string HexToString(string str) { // byte[] bytes = Encoding.UTF8.GetBytes(str); byte[] buff = new byte[str.Length / 2]; for (int i = 0; i < buff.Length; i++) { buff[i] = (byte)((int)byte.Parse(str.Substring(i * 2, 2), System.Globalization.NumberStyles.AllowHexSpecifier)); } string aa = Encoding.UTF8.GetString(buff); return aa; } |
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