建设银行对接（四）

上接“建设银行对接（三）”，javaeye的文章字数限制也太少了点吧，一篇文章连一个类代码都贴不完，这类代码也不长啊。

  /**   

     * 用私钥加密 

     * @param data 

     * @param key 

     * @return 

     * @throws Exception 

     */ 

    public static byte[] encryptByPrivateKey(byte[] data, byte[] key)  

            throws Exception {  

        // 对密钥解密  

        //byte[] keyBytes = decryptBASE64(key);  

 

        // 取得私钥  

        PKCS8EncodedKeySpec pkcs8KeySpec = new PKCS8EncodedKeySpec(key);  

        KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);  

        Key privateKey = keyFactory.generatePrivate(pkcs8KeySpec);  

 

        // 对数据加密  

        Cipher cipher = Cipher.getInstance(keyFactory.getAlgorithm());  

        cipher.init(Cipher.ENCRYPT_MODE, privateKey);  

 

        return cipher.doFinal(data);  

    }   

 

/** 

     * 取得私钥 

     *  

     * @param keyMap 

     * @return 

     * @throws Exception 

     */ 

    public static byte[] getPrivateKey(Map<String, Object> keyMap)  

            throws Exception {   

        Key key = (Key) keyMap.get(PRIVATE_KEY);  

 

        return key.getEncoded();  

    }  

 

    /** 

     * 取得公钥 

     *  

     * @param keyMap 

     * @return 

     * @throws Exception 

     */ 

    public static byte[] getPublicKey(Map<String, Object> keyMap)  

            throws Exception {  

        Key key = (Key) keyMap.get(PUBLIC_KEY);  

 

        return key.getEncoded();  

    }  

 

    /** 

     * 初始化密钥 

     *  

     * @return 

     * @throws Exception 

     */ 

    public static Map<String, Object> initKey() throws Exception {  

        KeyPairGenerator keyPairGen = KeyPairGenerator  

                .getInstance(KEY_ALGORITHM);  

        keyPairGen.initialize(1024);  

 

        KeyPair keyPair = keyPairGen.generateKeyPair();  

 

        // 公钥  

        RSAPublicKey publicKey = (RSAPublicKey) keyPair.getPublic();

 

        // 私钥  

        RSAPrivateKey privateKey = (RSAPrivateKey) keyPair.getPrivate();  

 

        Map<String, Object> keyMap = new HashMap<String, Object>(2);  

 

        keyMap.put(PUBLIC_KEY, publicKey);  

        keyMap.put(PRIVATE_KEY, privateKey);  

        return keyMap;  

    }  

} 

 

 

下面是建设银行服务类

 

package cn.ipanel.payment.business.bank.ccb;

import cn.ipanel.payment.business.bank.BankException;

import cn.ipanel.payment.business.bank.ccb.encryption.ByteUtil;

import cn.ipanel.payment.business.bank.ccb.encryption.Encoder;

import cn.ipanel.payment.business.bank.ccb.encryption.RSAEncoder;

 

 

/**

 * 建设银行服务

 * @author wangxiaoxue

 *

 */

public class CCBBankService{

         

    /**

     * 对建行返回的数据进行数字签名校验，校验算法如下:<br>

     * 1:将签名字符串和公钥转换成二进制格式<br>

     * 2:使用公钥进行签名的逆运算<br>

     * 3:使用标准MD5算法运算原文<br>

     * 4:比较1、2结果

     * @param  signature  数字签名字符串

     * @param  content    原文字符串

     * @param  publicKey  公钥字符串

     */

          public static boolean verifySignature(String signature,String content,String publicKey) throws BankException {

                   boolean status=false;

                   try {

                            //对原文进行MD5加密

                            byte[] md5bytes = Encoder.encryptMD5(content.getBytes());

                           

                            //对签名字符串进行逆运算，将16进制字符串按照约定算法转换为二进制数据

                            byte[] signbytes = ByteUtil.charToByte(signature);

                           

            //对公钥字符串进行逆运算，将16进制字符串按照约定算法转换为二进制数据

                            byte[] keybytes = ByteUtil.charToByte(publicKey);

                           

                            //校验

                            status = RSAEncoder.verify(md5bytes, keybytes, signbytes);

                   } catch (Exception e) {

                            e.printStackTrace();

                            throw new BankException("校验数字签名过程出现错误");

                   }                

                   return status;

          }

         

         

          /**

           * 加密发送的内容

           * @param senddata  发送的内容原文

           * @return  加密后的内容

           * @throws BankException

           */

          public static String encryptSenddata(String senddata)throws BankException{

                   String result=null;

                   try {

                            result= ByteUtil.byteToChar(Encoder.encryptMD5(senddata.getBytes()));

                   } catch (Exception e) {

                            e.printStackTrace();

                            throw new BankException("加密过程出现错误");

                   }       

                   return result;

          }