• AES加密,解决了同步问题,和随机密钥和固定密钥,多端通信加密不一致解决办法


    1、密钥随机生成。

    import java.security.InvalidAlgorithmParameterException;
    import java.security.InvalidKeyException;
    import java.security.NoSuchAlgorithmException;
    import java.security.SecureRandom;
    import java.security.spec.AlgorithmParameterSpec;
    
    import javax.crypto.BadPaddingException;
    import javax.crypto.Cipher;
    import javax.crypto.IllegalBlockSizeException;
    import javax.crypto.KeyGenerator;
    import javax.crypto.NoSuchPaddingException;
    import javax.crypto.SecretKey;
    import javax.crypto.spec.IvParameterSpec;
    
    
    /** 
    * @ClassName: AESUtil 
    * @Description: 对cookie进行加密解密
    * @author 
    * @date 2015-9-23 上午9:07:18 
    *  
    */
    public class AesUtils {
        
        public static final String logalrithm = "AES/CBC/PKCS5Padding";
        
        private static byte[] keyValue = new byte[] {        
            22,25,-35,-45,25,98,-55,-45,10,20,-45,25,
            26,-95,25,-65,-11,-99,85,45,-62,10,-0,11,
            -35,48,-98,65,-32,14,-78,25,36,-56,-45,-45,
            12,15,-35,-75,15,-14,62,-25,33,-45,55,68,-88
        };
        private static byte[] iv = new byte[] {                
            -12,35,-25,65,45,-87,95,-22,-15,45,55,-66,32,5-4,84,55
        };
        private static SecretKey key;                        
        private static AlgorithmParameterSpec paramSpec;                         
        
        static{        
            KeyGenerator kgen;
            try {
                kgen = KeyGenerator.getInstance("AES");
                kgen.init(128, new SecureRandom(keyValue));
                key = kgen.generateKey();
                paramSpec = new IvParameterSpec(iv);
            } catch (NoSuchAlgorithmException e) {
                e.printStackTrace();
            }
        }
    
        
        /** 
        * @Title: encrypt 
        * @Description: 加密,使用指定数据源生成密钥,使用用户数据作为算法参数进行AES加密
        * @return String    返回类型 
        * @param msg 加密的数据
        * @return
        * @date 2015-9-23 上午9:09:20 
        * @throws 
        */
        public static String encrypt(String msg) {
            String str = "";
            try {    
                Cipher ecipher = Cipher.getInstance(logalrithm);
                ecipher.init(Cipher.ENCRYPT_MODE, key, paramSpec);
                str = asHex(ecipher.doFinal(msg.getBytes()));
            } catch (BadPaddingException e) {
                e.printStackTrace();
            } catch (InvalidKeyException e) {
                e.printStackTrace();
            } catch (InvalidAlgorithmParameterException e) {
                e.printStackTrace();
            } catch (IllegalBlockSizeException e) {
                e.printStackTrace();
            } catch (NoSuchAlgorithmException e) {
                e.printStackTrace();
            } catch (NoSuchPaddingException e) {
                e.printStackTrace();
            }
            return str;
        }
        
        
        /** 
        * @Title: decrypt 
        * @Description: 解密,对生成的16进制的字符串进行解密
        * @return String    返回类型 
        * @author WUWeidong   
        * @param value
        * @return
        * @date 2015-9-23 上午9:10:01 
        * @throws 
        */
        public static String decrypt(String value) {
            try {
                Cipher ecipher = Cipher.getInstance(logalrithm);
                ecipher.init(Cipher.DECRYPT_MODE, key, paramSpec);
                return new String(ecipher.doFinal(asBin(value)));
            } catch (BadPaddingException e) {
                e.printStackTrace();
            } catch (InvalidKeyException e) {
                e.printStackTrace();
            } catch (InvalidAlgorithmParameterException e) {
                e.printStackTrace();
            } catch (IllegalBlockSizeException e) {
                e.printStackTrace();
            } catch (NoSuchAlgorithmException e) {
                e.printStackTrace();
            } catch (NoSuchPaddingException e) {
                e.printStackTrace();
            }
            return "";
        }
    
        
        /** 
        * @Title: asHex 
        * @Description: 将字节数组转换成16进制字符串
        * @return String    返回类型 
        * @param buf
        * @return
        * @date 2015-9-23 上午9:10:25 
        * @throws 
        */
        private static String asHex(byte[] buf) {
            StringBuffer strbuf = new StringBuffer(buf.length * 2);
            int i;
            for (i = 0; i < buf.length; i++) {
                if (((int) buf[i] & 0xff) < 0x10){
                    strbuf.append("0");
                }
                strbuf.append(Long.toString((int) buf[i] & 0xff, 16));
            }
            return strbuf.toString();
        }
    
       
        /** 
        * @Title: asBin 
        * @Description: 将16进制字符串转换成字节数组
        * @return byte[]    返回类型 
        * @author WUWeidong   
        * @param src
        * @return
        * @date 2015-9-23 上午9:10:52 
        * @throws 
        */
        private static byte[] asBin(String src) {
            if (src.length() < 1){
                return null;
            }
            byte[] encrypted = new byte[src.length() / 2];
            for (int i = 0; i < src.length() / 2; i++) {
                int high = Integer.parseInt(src.substring(i * 2, i * 2 + 1), 16);
                int low = Integer.parseInt(src.substring(i * 2 + 1, i * 2 + 2), 16);
                encrypted[i] = (byte) (high * 16 + low);
            }
            return encrypted;
        }
        
        public static void main(String[] args) {
            String msg="897807300";
            System.out.println(encrypt(msg));
            System.out.println(decrypt(encrypt(msg)));
        }
    }

    2、密钥固定,加密通信的时候可以使用

    package com.cmcc.omp.securityplatform.base;
    import java.io.UnsupportedEncodingException;
    import java.security.InvalidAlgorithmParameterException;
    import java.security.InvalidKeyException;
    import java.security.Key;
    import java.security.NoSuchAlgorithmException;
    
    import javax.crypto.BadPaddingException;
    import javax.crypto.Cipher;
    import javax.crypto.IllegalBlockSizeException;
    import javax.crypto.NoSuchPaddingException;
    import javax.crypto.spec.IvParameterSpec;
    import javax.crypto.spec.SecretKeySpec;
    
    
    /** 
    * @ClassName: AESUtil 
    * @Description: 对cookie进行加密解密
    * @date 2015-9-23 上午9:07:18 
    *  
    */
    public class AesUtils {
        
        public static final String logalrithm = "AES/CBC/PKCS5Padding";
        public static final String bm = "utf-8";  
        private static byte[] keyValue = new byte[] {        
            22,-35,-45,25,98,-55,-45,10,35,-45,25,26,-95,25,-35,48
        };
        private static byte[] iv = new byte[] {                
            -12,35,-25,65,45,-87,95,-22,-15,45,55,-66,32,5-4,84,55
        };
        
        private static Key keySpec;
        private static IvParameterSpec ivSpec;                     
    
        static{        
            keySpec = new SecretKeySpec(keyValue, "AES");
            ivSpec = new IvParameterSpec(iv);     
        }    
        
        /** 
        * @Title: encrypt 
        * @Description: 加密,使用指定数据源生成密钥,使用用户数据作为算法参数进行AES加密
        * @return String    返回类型 
        * @param msg 加密的数据
        * @return
        * @date 2015-9-23 上午9:09:20 
        * @throws 
        */
        public static String encrypt(String msg) {
            byte[] encryptedData = null;
            try {
                Cipher ecipher = Cipher.getInstance(logalrithm);
                ecipher.init(Cipher.ENCRYPT_MODE, keySpec, ivSpec);
                encryptedData = ecipher.doFinal(msg.getBytes(bm));  
            } catch (IllegalBlockSizeException | BadPaddingException e) {
                e.printStackTrace();
            } catch (NoSuchAlgorithmException e) {
                e.printStackTrace();
            } catch (NoSuchPaddingException e) {
                e.printStackTrace();
            } catch (InvalidKeyException e) {
                e.printStackTrace();
            } catch (InvalidAlgorithmParameterException e) {
                e.printStackTrace();
            } catch (UnsupportedEncodingException e) {
                e.printStackTrace();
            }
            return asHex(encryptedData);
        }
        
        
        /** 
        * @Title: decrypt 
        * @Description: 解密,对生成的16进制的字符串进行解密
        * @return String    返回类型    
        * @param value
        * @return
        * @date 2015-9-23 上午9:10:01 
        * @throws 
        */
        public static String decrypt(String value) {
            try {
                Cipher ecipher = Cipher.getInstance(logalrithm);
                ecipher.init(Cipher.DECRYPT_MODE, keySpec, ivSpec);
                return new String(ecipher.doFinal(asBin(value)));
            } catch (BadPaddingException e) {
                System.out.println("解密错误:"+value);
                e.printStackTrace();
            } catch (IllegalBlockSizeException e) {
                System.out.println("解密错误:"+value);
                e.printStackTrace();
            } catch (NoSuchAlgorithmException e) {
                e.printStackTrace();
            } catch (NoSuchPaddingException e) {
                e.printStackTrace();
            } catch (InvalidKeyException e) {
                e.printStackTrace();
            } catch (InvalidAlgorithmParameterException e) {
                e.printStackTrace();
            }
            return "";
        }
    
        
        /** 
        * @Title: asHex 
        * @Description: 将字节数组转换成16进制字符串
        * @return String    返回类型  
        * @param buf
        * @return
        * @date 2015-9-23 上午9:10:25 
        * @throws 
        */
        private static String asHex(byte[] buf) {
            StringBuffer strbuf = new StringBuffer(buf.length * 2);
            int i;
            for (i = 0; i < buf.length; i++) {
                if (((int) buf[i] & 0xff) < 0x10){
                    strbuf.append("0");
                }
                strbuf.append(Long.toString((int) buf[i] & 0xff, 16));
            }
            return strbuf.toString();
        }
    
       
        /** 
        * @Title: asBin 
        * @Description: 将16进制字符串转换成字节数组
        * @return byte[]    返回类型 
        * @param src
        * @return
        * @date 2015-9-23 上午9:10:52 
        * @throws 
        */
        private static byte[] asBin(String src) {
            if (src.length() < 1){
                return null;
            }
            byte[] encrypted = new byte[src.length() / 2];
            for (int i = 0; i < src.length() / 2; i++) {
                int high = Integer.parseInt(src.substring(i * 2, i * 2 + 1), 16);
                int low = Integer.parseInt(src.substring(i * 2 + 1, i * 2 + 2), 16);
                encrypted[i] = (byte) (high * 16 + low);
            }
            return encrypted;
        }
        
        public static void main(String[] args) {
            String userid = "897807300@qq.com";
            String token = "8aa8690f65f080aee595d8781e7044a7eacda7a86520786db0838136554920b6";
            System.out.println(encrypt(userid));
            System.out.println(decrypt(encrypt(userid)));
        }
        
    }
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  • 原文地址:https://www.cnblogs.com/wuweidong/p/5952902.html
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