package com.java110.common.factory;
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import com.alibaba.fastjson.JSONArray;
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import com.alibaba.fastjson.JSONObject;
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import com.java110.common.cache.MappingCache;
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import com.java110.common.constant.MappingConstant;
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import com.java110.common.constant.ResponseConstant;
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import com.java110.common.exception.NoAuthorityException;
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import com.java110.entity.center.DataFlow;
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import org.apache.commons.codec.digest.DigestUtils;
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import javax.crypto.Cipher;
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import java.io.ByteArrayInputStream;
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import java.io.ByteArrayOutputStream;
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import java.io.UnsupportedEncodingException;
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import java.security.*;
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import java.security.spec.PKCS8EncodedKeySpec;
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import java.security.spec.X509EncodedKeySpec;
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import java.util.Base64;
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/**
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*
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* 鉴权工厂类
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* Created by wuxw on 2018/4/23.
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*/
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public class AuthenticationFactory {
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/**
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* md5签名
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* @param inStr
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* @return
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*/
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public static String md5(String inStr) throws NoAuthorityException{
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try {
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return DigestUtils.md5Hex(inStr.getBytes("UTF-8"));
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} catch (UnsupportedEncodingException e) {
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throw new NoAuthorityException(ResponseConstant.RESULT_CODE_NO_AUTHORITY_ERROR,"MD5签名过程中出现错误");
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}
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}
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/**
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* dataFlow 对象签名
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* @param dataFlow
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* @return
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*/
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public static String dataFlowMd5(DataFlow dataFlow) throws NoAuthorityException{
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if(dataFlow == null){
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throw new NoAuthorityException(ResponseConstant.RESULT_CODE_NO_AUTHORITY_ERROR,"MD5签名过程中出现错误");
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}
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String reqInfo = dataFlow.getTransactionId() + dataFlow.getAppId() + dataFlow.getReqBusiness().toJSONString()+dataFlow.getAppRoutes().get(0).getSecurityCode();
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return md5(reqInfo);
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}
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/**
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* md5加密
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* @param transactionId 流水
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* @param appId 应用ID
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* @param businesses 内容
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* @return
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*/
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public static String md5(String transactionId,String appId,String businesses,String code){
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return md5(transactionId+appId+businesses).toLowerCase();
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}
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/**
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* 添加 sign
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* @param dataFlow
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* @param responseJson
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*/
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public static void putSign(DataFlow dataFlow,JSONObject responseJson){
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JSONObject orders = responseJson.getJSONObject("orders");
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JSONArray business = responseJson.getJSONArray("business");
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if(dataFlow == null || dataFlow.getAppRoutes() == null || dataFlow.getAppRoutes().size() == 0) {
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/*orders.put("sign", AuthenticationFactory.md5(orders.getString("transactionId"), orders.getString("responseTime"),
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business.toJSONString(), MappingCache.getValue(MappingConstant.KEY_DEFAULT_SECURITY_CODE)));*/
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orders.put("sign","");
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}else {
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orders.put("sign", AuthenticationFactory.md5(orders.getString("transactionId"), orders.getString("responseTime"),
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business.toJSONString(), dataFlow.getAppRoutes().get(0).getSecurityCode()));
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}
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}
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/**
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* 加密
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* @param data
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* @param publicKey
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* @param keySize
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* @return
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* @throws Exception
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*/
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public static byte[] encrypt(byte[] data, PublicKey publicKey, int keySize)
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throws Exception
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{
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Cipher cipher = Cipher.getInstance("RSA/ECB/PKCS1PADDING", "BC");
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cipher.init(Cipher.ENCRYPT_MODE, publicKey);
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int blockSize = (keySize >> 3) - 11;
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int inputLen = data.length;
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ByteArrayOutputStream out = new ByteArrayOutputStream();
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int offSet = 0;
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int i = 0;
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while (inputLen - offSet > 0) {
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byte[] buf;
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if (inputLen - offSet > blockSize) {
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buf = cipher.doFinal(data, offSet, blockSize);
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}else {
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buf = cipher.doFinal(data, offSet, inputLen - offSet);
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}
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out.write(buf, 0, buf.length);
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++i;
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offSet = i * blockSize;
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}
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byte[] result = out.toByteArray();
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return result;
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}
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/**
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* 解密
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* @param data
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* @param privateKey
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* @param keySize
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* @return
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* @throws Exception
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*/
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public static byte[] decrypt(byte[] data, PrivateKey privateKey, int keySize)
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throws Exception
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{
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Cipher cipher = Cipher.getInstance("RSA/ECB/PKCS1PADDING", "BC");
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cipher.init(Cipher.DECRYPT_MODE, privateKey);
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int blockSize = keySize >> 3;
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ByteArrayInputStream byteArrayInputStream = new ByteArrayInputStream(data);
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ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
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byte[] buf = new byte[blockSize];
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int len = 0;
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while ((len = byteArrayInputStream.read(buf)) > 0) {
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byteArrayOutputStream.write(cipher.doFinal(buf, 0, len));
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}
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return byteArrayOutputStream.toByteArray();
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}
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/**
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* 加载公钥
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* @param keyData
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* @return
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* @throws Exception
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*/
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public static PublicKey loadPubKey(String keyData)
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throws Exception
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{
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return loadPemPublicKey(keyData, "RSA");
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}
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/**
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* 加载私钥
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* @param keyData
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* @return
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* @throws Exception
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*/
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public static PrivateKey loadPrivateKey(String keyData) throws Exception {
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return loadPrivateKeyPkcs8(keyData, "RSA");
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}
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/**
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* 加载私钥
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* @param privateKeyPem
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* @param algorithm
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* @return
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* @throws Exception
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*/
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public static PrivateKey loadPrivateKeyPkcs8(String privateKeyPem, String algorithm)
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throws Exception
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{
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String privateKeyData = privateKeyPem.replace("-----BEGIN PRIVATE KEY-----", "");
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privateKeyData = privateKeyData.replace("-----END PRIVATE KEY-----", "");
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privateKeyData = privateKeyData.replace("\n", "");
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privateKeyData = privateKeyData.replace("\r", "");
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byte[] decoded = Base64.getDecoder().decode(privateKeyData.getBytes());
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PKCS8EncodedKeySpec pkcs8KeySpec = new PKCS8EncodedKeySpec(decoded);
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KeyFactory keyFactory = KeyFactory.getInstance(algorithm);
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return keyFactory.generatePrivate(pkcs8KeySpec);
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}
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/**
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* 加载公钥
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* @param publicPemData
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* @param algorithm
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* @return
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* @throws Exception
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*/
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public static PublicKey loadPemPublicKey(String publicPemData, String algorithm)
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throws Exception
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{
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String publicKeyPEM = publicPemData.replace("-----BEGIN PUBLIC KEY-----", "");
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publicKeyPEM = publicKeyPEM.replace("-----END PUBLIC KEY-----", "");
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publicKeyPEM = publicKeyPEM.replace("\n", "");
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publicKeyPEM = publicKeyPEM.replace("\r", "");
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byte[] decoded =Base64.getDecoder().decode(publicKeyPEM.getBytes());
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X509EncodedKeySpec spec = new X509EncodedKeySpec(decoded);
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KeyFactory keyFactory = KeyFactory.getInstance(algorithm);
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return keyFactory.generatePublic(spec);
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}
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//生成密钥对
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private static KeyPair genKeyPair(int keyLength) throws Exception{
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KeyPairGenerator keyPairGenerator=KeyPairGenerator.getInstance("RSA");
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keyPairGenerator.initialize(1024);
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return keyPairGenerator.generateKeyPair();
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}
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public static void main(String[] args) throws Exception{
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KeyPair keyPair=genKeyPair(1024);
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//获取公钥，并以base64格式打印出来
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PublicKey publicKey=keyPair.getPublic();
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System.out.println("公钥："+new String(Base64.getEncoder().encode(publicKey.getEncoded())));
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//获取私钥，并以base64格式打印出来
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PrivateKey privateKey=keyPair.getPrivate();
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System.out.println("私钥："+new String(Base64.getEncoder().encode(privateKey.getEncoded())));
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}
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}
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