java加解密:
1 public class Encrypt 2 { 3 public Encrypt() 4 { 5 } 6 public static String eCode(String needEncrypt) throws Exception 7 { 8 byte result[] = null; 9 try 10 { 11 Cipher enCipher = Cipher.getInstance("DES"); 12 javax.crypto.SecretKey key = Key.loadKey(); 13 enCipher.init(1, key); 14 result = enCipher.doFinal(needEncrypt.getBytes()); 15 BASE64Encoder b = new BASE64Encoder(); 16 ByteArrayOutputStream bos = new ByteArrayOutputStream(); 17 b.encode(result, bos); 18 result = bos.toByteArray(); 19 } 20 catch(Exception e) 21 { 22 throw e; 23 } 24 return new String(result); 25 } 26 public static String dCode(byte result[]) 27 throws Exception 28 { 29 String s = null; 30 String key = ""; 31 try 32 { 33 Cipher deCipher = Cipher.getInstance("DES"); 34 deCipher.init(2, Key.loadKey()); 35 BASE64Decoder d = new BASE64Decoder(); 36 result = d.decodeBuffer(new String(result)); 37 byte[] iv = deCipher.getIV(); 38 byte strByte[] = deCipher.doFinal(result); 39 s = new String(strByte); 40 } 41 catch(Exception e) 42 { 43 throw e; 44 } 45 return s; 46 } 47 }
注:Key.loadKey()实现从配置文件中读取key,然后base64解码，封装在SecretKey对象中。
原：http://blog.sina.com.cn/s/blog_6d51d25e0100lp28.html
.Net解密:
（详见：http://www.cnblogs.com/ryhan/archive/2012/08/28/2660372.html）
1 private string dCode(string str,string strKey) 2 { 3 byte[] bStr = Convert.FromBase64String(str); 4 byte[] key = Convert.FromBase64String(strKey); 5 DES des = new DESCryptoServiceProvider(); 6 des.Mode = System.Security.Cryptography.CipherMode.ECB; 7 des.Key = key; 8 des.IV = new byte[8]; 9 byte[] resultBytes = des.CreateDecryptor().TransformFinalBlock(bStr, 0, bStr.Length); 10 return System.Text.Encoding.UTF8.GetString(resultBytes); 11 } 12 算法区别： 1.java和.net默认的加密模式不同，java是ECB模式，.net是CBC模式。如果.net不手工指定ECB模式的话，在bStr.length>8时会抛异常。 2.java和.net默认初始化向量(IV)不同，java中如不指定IV,则自动以byte[8]初始化，而.net会抛异常,要des.IV = new byte[8];
