android和.net webservice中的DES加密算法

少年辛苦终身事，莫向光阴惰寸功。这篇文章主要讲述android和.net webservice中的DES加密算法相关的知识，希望能为你提供帮助。

也是看了一堆的例子,本身并不会写加密算法,好在只要会用就行了,我们把在app中使用的参数加密,然后在.net端的webservice中进行解密,本身并没有什么问题,但是android下和.net下的des加密算法有些不同,写下供以后使用.
android端的DES.

public class DES { private static byte[] iv = { 1, 2, 3, 4, 5, 6, 7, 8 }; //加密. public static String encryptDES(String encryptString, String encryptKey) throws Exception { Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding"); DESKeySpec desKeySpec = new DESKeySpec(encryptKey.getBytes("UTF-8")); SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES"); SecretKey secretKey = keyFactory.generateSecret(desKeySpec); IvParameterSpec iv = new IvParameterSpec(encryptKey.getBytes("UTF-8")); cipher.init(Cipher.ENCRYPT_MODE, secretKey, iv); return toHexString(cipher.doFinal(encryptString.getBytes("UTF-8"))); }//解密. public static String decryptDES(String decryptString, String decryptKey) throws Exception { byte[] bytesrc =https://www.songbingjia.com/android/convertHexString(decryptString); Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding"); DESKeySpec desKeySpec = new DESKeySpec(decryptKey.getBytes("UTF-8")); SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES"); SecretKey secretKey = keyFactory.generateSecret(desKeySpec); IvParameterSpec iv = new IvParameterSpec(decryptKey.getBytes("UTF-8")); cipher.init(Cipher.DECRYPT_MODE, secretKey, iv); byte[] retByte = cipher.doFinal(bytesrc); return new String(retByte); }public static String myKey(){//这个可以不要，我是为了方便，获得加密解密的key return "12345678"; }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(); }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 = https://www.songbingjia.com/android/Integer.parseInt(byteString, 16); digest[i] = (byte)byteValue; }return digest; } }

.net端的.

Private sKey As String = "12345678" ‘====================说明========================= ‘开始于2017-6-15,用于测试android studio调用webservice的例子,用完可以删除.... ‘================================================= < WebMethod()> _ Public Function HelloWorld() As String Return "测试成功,用于返回一个有用的结果值!" End Function‘‘‘ < summary> ‘‘‘ DES加密算法 ‘‘‘ < /summary> ‘‘‘ < param name="pToEncrypt"> < /param> ‘‘‘ < param name="sKey"> < /param> ‘‘‘ < returns> < /returns> ‘‘‘ < remarks> < /remarks> Public Function Encrypt(ByVal pToEncrypt As String, ByVal sKey As String) As String Dim des As New DESCryptoServiceProvider() Dim inputByteArray() As Byte = Encoding.UTF8.GetBytes(pToEncrypt)des.Key = UTF8Encoding.UTF8.GetBytes(sKey) des.IV = UTF8Encoding.UTF8.GetBytes(sKey) Dim ms As New MemoryStream() Dim cs As New CryptoStream(ms, des.CreateEncryptor(), CryptoStreamMode.Write)cs.Write(inputByteArray, 0, inputByteArray.Length) cs.FlushFinalBlock()Dim ret As New StringBuilder() For Each b As Byte In ms.ToArray() ret.AppendFormat("{0:X2}", b) Next b ret.ToString() Return ret.ToString() End Function‘‘‘ < summary> ‘‘‘ DES解密算法. ‘‘‘ < /summary> ‘‘‘ < param name="pToDecrypt"> < /param> ‘‘‘ < param name="sKey"> < /param> ‘‘‘ < returns> < /returns> ‘‘‘ < remarks> < /remarks> Public Function Decrypt(ByVal pToDecrypt As String, ByVal sKey As String) As String Dim des As New DESCryptoServiceProvider()Dim inputByteArray((pToDecrypt.Length \ 2) - 1) As Byte For x As Integer = 0 To (pToDecrypt.Length \ 2) - 1 Dim i As Integer = (Convert.ToInt32(pToDecrypt.Substring(x * 2, 2), 16)) inputByteArray(x) = CByte(i) Next xdes.Key = UTF8Encoding.UTF8.GetBytes(sKey) des.IV = UTF8Encoding.UTF8.GetBytes(sKey) Dim ms As New MemoryStream() Dim cs As New CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write) cs.Write(inputByteArray, 0, inputByteArray.Length) cs.FlushFinalBlock() Dim ret As New StringBuilder() Return Encoding.UTF8.GetString(ms.ToArray()) End Function

【android和.net webservice中的DES加密算法】
经过使用,发现没有任何问题,可以相互加解密.