RSA接口加密

﹏ヽ暗。殇╰゛Y 2024-04-18 12:49 52阅读 0赞

### 文章目录 ###

*  1.工具类
 *  2.测试
 *  3.http工具类

# 1.工具类 #

import java.security.KeyFactory;
    import java.security.KeyPair;
    import java.security.KeyPairGenerator;
    import java.security.NoSuchAlgorithmException;
    import java.security.SecureRandom;
    import java.security.interfaces.RSAPrivateKey;
    import java.security.interfaces.RSAPublicKey;
    import java.security.spec.PKCS8EncodedKeySpec;
    import java.security.spec.X509EncodedKeySpec;
    import java.util.ArrayList;
    import java.util.Base64;
    import java.util.List;
    
    import javax.crypto.Cipher;
    
    import org.apache.commons.lang3.ArrayUtils;
    /** * Java RSA 加密工具类 * 参考： https://blog.csdn.net/qy20115549/article/details/83105736 */
    public class RSAUtils { 
        /** * 密钥长度 于原文长度对应 以及越长速度越慢 */
        private final static int KEY_SIZE = 1024;
        /** * 用于封装随机产生的公钥与私钥 */
    // private static Map<Integer, String> keyMap = new HashMap<Integer, String>();
        /** * 随机生成密钥对 */
        public static List<String> genKeyPair() throws NoSuchAlgorithmException { 
        	List<String> keyList = new ArrayList();
            // KeyPairGenerator类用于生成公钥和私钥对，基于RSA算法生成对象
            KeyPairGenerator keyPairGen = KeyPairGenerator.getInstance("RSA");
            // 初始化密钥对生成器
            keyPairGen.initialize(KEY_SIZE, new SecureRandom());
            // 生成一个密钥对，保存在keyPair中
            KeyPair keyPair = keyPairGen.generateKeyPair();
            // 得到私钥
            RSAPrivateKey privateKey = (RSAPrivateKey) keyPair.getPrivate();
            // 得到公钥
            RSAPublicKey publicKey = (RSAPublicKey) keyPair.getPublic();
            String publicKeyString = Base64.getEncoder().encodeToString(publicKey.getEncoded());
            // 得到私钥字符串
            String privateKeyString = Base64.getEncoder().encodeToString(privateKey.getEncoded());
            // 将公钥和私钥保存到Map
            //0表示公钥
            keyList.add(publicKeyString);
            //1表示私钥
            keyList.add(privateKeyString);
    		return keyList;
        }
        
        
        
        
        /** * RSA公钥加密 * * @param str 加密字符串 * @param publicKey 公钥 * @return 密文 * @throws Exception 加密过程中的异常信息 */
        public static String encrypt(String str, String publicKey) throws Exception { 
            //base64编码的公钥
            byte[] decoded = Base64.getDecoder().decode(publicKey);
            RSAPublicKey pubKey = (RSAPublicKey) KeyFactory.getInstance("RSA").generatePublic(new X509EncodedKeySpec(decoded));
            //RSA加密
            Cipher cipher = Cipher.getInstance("RSA");
            cipher.init(Cipher.ENCRYPT_MODE, pubKey);
            
            byte[] bytes = str.getBytes("UTF-8");
            byte[] dataReturn = { };
            // 加密时超过117字节就报错。为此采用分段加密的办法来加密
         			StringBuilder sb = new StringBuilder();
         			for (int i = 0; i < bytes.length; i += 100) { 
         				byte[] doFinal = cipher.doFinal(ArrayUtils.subarray(bytes, i,i + 100));
         				sb.append(new String(doFinal));
         				dataReturn = ArrayUtils.addAll(dataReturn, doFinal);
         			}
            String outStr = Base64.getEncoder().encodeToString(dataReturn);
            return outStr;
        }
        /** * RSA私钥解密 * * @param str 加密字符串 * @param privateKey 私钥 * @return 明文 * @throws Exception 解密过程中的异常信息 */
        public static String decrypt(String str, String privateKey) throws Exception { 
        	//64位解码加密后的字符串
            byte[] inputByte = Base64.getDecoder().decode(str);
            //base64编码的私钥
            byte[] decoded = Base64.getDecoder().decode(privateKey);
            RSAPrivateKey priKey = (RSAPrivateKey) KeyFactory.getInstance("RSA").generatePrivate(new PKCS8EncodedKeySpec(decoded));
            //RSA解密
            Cipher cipher = Cipher.getInstance("RSA/ECB/PKCS1Padding");
            cipher.init(Cipher.DECRYPT_MODE, priKey);
            
            byte[] dataReturn = { };
            // 解密时超过128字节就报错。为此采用分段解密的办法来解密
         	StringBuilder sb = new StringBuilder();
         	for (int i = 0; i < inputByte.length; i += 128) { 
         		byte[] doFinal = cipher.doFinal(ArrayUtils.subarray(inputByte, i,
         				i + 128));	
         		sb.append(new String(doFinal));
         	}
         	dataReturn = sb.toString().getBytes("UTF-8");
            
            String outStr = new String(dataReturn);
            return outStr;
        }
    
    }

# 2.测试 #

long temp = System.currentTimeMillis();
    	        //生成公钥和私钥
    	        //加密字符串
    		 List<String> genKeyPair = RSAUtils.genKeyPair();
    		 	String publicKey  = genKeyPair.get(0);
    		 	String privateKey = genKeyPair.get(1);
    	        System.out.println("公钥:" + publicKey);
    	        System.out.println("私钥:" + privateKey);
    	        System.out.println("生成密钥消耗时间:" + (System.currentTimeMillis() - temp) / 1000.0 + "秒");
    	        String message = "我是中文";
    	        System.out.println("原文:" + message);
    	        temp = System.currentTimeMillis();
    	        String messageEn = RSAUtils.encrypt(message, publicKey);
    	        System.out.println("密文:" + messageEn);
    	        System.out.println("加密消耗时间:" + (System.currentTimeMillis() - temp) / 1000.0 + "秒");
    	        temp = System.currentTimeMillis();
    	        String messageDe = RSAUtils.decrypt("hgveRO0cVu+E6VZ1Npm0i0dpsq3dyUW9i2IeUACXNs/oz7XtXH0PxI+rkPt4URrQaUX2eAaBMxyzgdglPoNEA99+H1vTJt2aeQGphCpmof0f92zi4QAcdfwZFgv1kMg6fW5O8bxDUJJ6jMy+/uo4o/rWUVgRgiZFMK1U/cDcXbU=", "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");
    	        //System.out.println("解密:" + messageDe);
    	        //System.out.println("解密消耗时间:" + (System.currentTimeMillis() - temp) / 1000.0 + "秒");
    // 
    		String httpPost = HttpClientUtil.httpPost("http://127.0.0.1:9001/api/test", messageEn, privateKey);

# 3.http工具类 #

package com.dstz.base.rest.util;
    
    import java.io.IOException;
    import java.io.UnsupportedEncodingException;
    import java.util.ArrayList;
    import java.util.List;
    import java.util.Map;
    import java.util.Map.Entry;
    
    import org.apache.http.Header;
    import org.apache.http.HttpEntity;
    import org.apache.http.HttpResponse;
    import org.apache.http.NameValuePair;
    import org.apache.http.ParseException;
    import org.apache.http.client.HttpClient;
    import org.apache.http.client.entity.UrlEncodedFormEntity;
    import org.apache.http.client.methods.HttpGet;
    import org.apache.http.client.methods.HttpPost;
    import org.apache.http.entity.StringEntity;
    import org.apache.http.impl.client.DefaultHttpClient;
    import org.apache.http.message.BasicNameValuePair;
    import org.apache.http.params.BasicHttpParams;
    import org.apache.http.params.CoreConnectionPNames;
    import org.apache.http.params.HttpParams;
    import org.apache.http.util.EntityUtils;
    import org.slf4j.Logger;
    import org.slf4j.LoggerFactory;
    import org.springframework.web.context.request.NativeWebRequest;
    
    /** * HttpClientUtil 工具类 * * @author Frez */
    public class HttpClientUtil { 
    
        // 设置默认超时时间为60s
        public static final int DEFAULT_TIME_OUT = 60 * 1000;
        // 默认字符集UTF-8
        public static final String DEFAULT_CHARSET = "UTF-8";
    
        private static Logger log = LoggerFactory.getLogger(HttpClientUtil.class);
    
    
        /** * http请求 * * @param url * @param paramMap * @param charset * @param isPost * @return */
        public static String sendHttpRequest(String url, Map<String, String> paramMap, String charset, boolean isPost) { 
            return sendHttpRequest(url, paramMap, charset, isPost, DEFAULT_TIME_OUT);
        }
    
        /** * http请求 * * @param url * @param paramMap * @param charset * @param isPost * @param timeout * @return */
        public static String sendHttpRequest(String url, Map<String, String> paramMap, String charset, boolean isPost, int timeout) { 
            if (isPost) { 
                return httpPost(url, paramMap, charset, timeout);
            }
            return httpGet(url, paramMap, charset, timeout);
        }
    
        public static String httpPost(String url, Map<String, String> params) { 
            return httpPost(url, params, DEFAULT_CHARSET, DEFAULT_TIME_OUT);
        }
    
        /** * post请求 * * @param url * @param params * @param charset * @param timeout * @return */
        public static String httpPost(String url, Map<String, String> params, String charset, int timeout) { 
            log.error("http request url: " + url + " charset:" + charset + " timeout: " + timeout + " request str: " + params);
            // 参数组装
            List<NameValuePair> pairs = new ArrayList<NameValuePair>();
            for (Entry<String, String> entry : params.entrySet()) { 
                String key = entry.getKey();
                String value = entry.getValue();
                pairs.add(new BasicNameValuePair(key, formatStr(value)));
            }
            HttpEntity httpEntity;
            try { 
                httpEntity = new UrlEncodedFormEntity(pairs);
                return httpPost(url, charset, timeout, httpEntity);
            } catch (UnsupportedEncodingException e) { 
                e.printStackTrace();
            }
            return null;
        }
    
        /** * post请求 * * @param url * @param jsonStr * @return */
        public static String httpPost(String url, String jsonStr) { 
            return httpPost(url, jsonStr, "UTF-8", DEFAULT_TIME_OUT);
        }
        
        
        /** * post请求 * * @param url * @param jsonStr * @param token * @return */
        public static String httpPost(String url, String jsonStr,String token) { 
            return httpPost(url, jsonStr, "UTF-8", DEFAULT_TIME_OUT,token);
        }
    
    
        /** * post请求 * * @param url * @param jsonStr * @param charset * @param timeout * @return */
        public static String httpPost(String url, String jsonStr, String charset, int timeout,String token) { 
            log.error("http request url: " + url + " charset:" + charset + " timeout: " + timeout + " request jsonStr: " + jsonStr+ " token : " + token);
            HttpEntity httpEntity = null;
            httpEntity = new StringEntity(jsonStr, charset);
    		return httpPost(url, charset, timeout, httpEntity,token);
        }
    
    	/** * post请求 * * @param url * @param jsonStr * @param charset * @param timeout * @return */
        public static String httpPost(String url, String jsonStr, String charset, int timeout) { 
            log.error("http request url: " + url + " charset:" + charset + " timeout: " + timeout + " request jsonStr: " + jsonStr);
            HttpEntity httpEntity = null;
            httpEntity = new StringEntity(jsonStr, charset);
    		return httpPost(url, charset, timeout, httpEntity);
        }
    
        public static String httpPost(String url, HttpEntity httpEntity) { 
            return httpPost(url, "UTF-8", DEFAULT_TIME_OUT, httpEntity);
        }
        
        /** * post请求 * * @param url * @param charset * @param timeout * @param httpEntity * @return */
        public static String httpPost(String url, String charset, int timeout, HttpEntity httpEntity,String token) { 
            log.error("http url:" + url);
            if (url == null || url.equals("")) { 
                return null;
            }
            String result = null;
            HttpClient httpClient = null;
            HttpPost httpPost = null;
            String responseBody = null;
            HttpResponse httpResponse = null;
            try { 
                HttpParams httpParams = new BasicHttpParams();
                httpParams.setParameter(CoreConnectionPNames.CONNECTION_TIMEOUT, timeout);
                httpClient = new DefaultHttpClient(httpParams);
                httpPost = new HttpPost(url);
                httpPost.setEntity(httpEntity);
    			httpPost.setHeader("token", token);
                httpResponse = httpClient.execute(httpPost);
                int statusCode = httpResponse.getStatusLine().getStatusCode();
                if (statusCode != 200) { 
                    httpPost.abort();
                    throw new RuntimeException("HttpClient,error status code :" + statusCode);
                }
                HttpEntity entity = httpResponse.getEntity();
                responseBody = EntityUtils.toString(entity, charset);
                result = responseBody;
            } catch (Exception e) { 
                e.printStackTrace();
            } finally { 
                try { 
                    // 关闭连接,释放资源
                    if (httpClient != null) { 
                        httpClient.getConnectionManager().shutdown();
                    }
                } catch (Exception e) { 
                    e.printStackTrace();
                }
            }
            log.error("http return:" + result);
            return result;
        }
    
        /** * post请求 * * @param url * @param charset * @param timeout * @param httpEntity * @return */
        public static String httpPost(String url, String charset, int timeout, HttpEntity httpEntity) { 
            log.error("http url:" + url);
            if (url == null || url.equals("")) { 
                return null;
            }
            String result = null;
            HttpClient httpClient = null;
            HttpPost httpPost = null;
            String responseBody = null;
            HttpResponse httpResponse = null;
            try { 
                HttpParams httpParams = new BasicHttpParams();
                httpParams.setParameter(CoreConnectionPNames.CONNECTION_TIMEOUT, timeout);
                httpClient = new DefaultHttpClient(httpParams);
                httpPost = new HttpPost(url);
                httpPost.setEntity(httpEntity);
                httpResponse = httpClient.execute(httpPost);
                int statusCode = httpResponse.getStatusLine().getStatusCode();
                if (statusCode != 200) { 
                    httpPost.abort();
                    throw new RuntimeException("HttpClient,error status code :" + statusCode);
                }
                HttpEntity entity = httpResponse.getEntity();
                responseBody = EntityUtils.toString(entity, charset);
                result = responseBody;
            } catch (Exception e) { 
                e.printStackTrace();
            } finally { 
                try { 
                    // 关闭连接,释放资源
                    if (httpClient != null) { 
                        httpClient.getConnectionManager().shutdown();
                    }
                } catch (Exception e) { 
                    e.printStackTrace();
                }
            }
            log.error("http return:" + result);
            return result;
        }
    
        /** * get请求 * * @param url * @param params * @return */
        public static String httpGet(String url, Map<String, String> params) { 
            return httpGet(url, params, "UTF-8", DEFAULT_TIME_OUT);
        }
    
        /** * get请求 * * @param url * @param params * @param charset * @param timeout * @return */
        public static String httpGet(String url, Map<String, String> params, String charset, int timeout) { 
            HttpClient httpClient = null;
            try { 
                HttpParams httpParams = new BasicHttpParams();
                httpParams.setParameter(CoreConnectionPNames.CONNECTION_TIMEOUT, DEFAULT_TIME_OUT);
                httpClient = new DefaultHttpClient(httpParams);
                HttpEntity httpEntity = httpGetEntity(httpClient, url, params, DEFAULT_CHARSET);
                return EntityUtils.toString(httpEntity, charset);
            } catch (ParseException e) { 
                e.printStackTrace();
            } catch (IOException e) { 
                e.printStackTrace();
            } finally { 
                try { 
                    if (httpClient != null) { 
                        httpClient.getConnectionManager().shutdown();
                    }
                } catch (Exception e) { 
                    e.printStackTrace();
                }
            }
            return null;
        }
    
        /** * get请求 * * @param url * @param params * @param charset * @param timeout * @return */
        public static byte[] httpGetBytes(String url, Map<String, String> params) { 
            HttpClient httpClient = null;
            try { 
                HttpParams httpParams = new BasicHttpParams();
                httpParams.setParameter(CoreConnectionPNames.CONNECTION_TIMEOUT, DEFAULT_TIME_OUT);
                httpClient = new DefaultHttpClient(httpParams);
                HttpEntity httpEntity = httpGetEntity(httpClient, url, params, DEFAULT_CHARSET);
                return EntityUtils.toByteArray(httpEntity);
            } catch (ParseException e) { 
                e.printStackTrace();
            } catch (IOException e) { 
                e.printStackTrace();
            } finally { 
                try { 
                    if (httpClient != null) { 
                        httpClient.getConnectionManager().shutdown();
                    }
                } catch (Exception e) { 
                    e.printStackTrace();
                }
            }
            return null;
        }
    
        /** * get请求 * * @param url * @param params * @param charset * @param timeout * @return */
        public static HttpEntity httpGetEntity(HttpClient httpClient, String url, Map<String, String> params, String charset) { 
            log.error("http request url: " + url + " charset:" + charset + " request str: " + params);
            if (url == null || url.equals("")) { 
                return null;
            }
            HttpGet httpGet;
            HttpResponse httpResponse;
            HttpEntity entity = null;
            try { 
                if (params != null && !params.isEmpty()) { 
                    List<NameValuePair> pairs = new ArrayList<NameValuePair>();
                    for (Entry<String, String> entry : params.entrySet()) { 
                        String key = entry.getKey();
                        String value = entry.getValue();
                        pairs.add(new BasicNameValuePair(key, formatStr(value)));
                    }
                    url = url + "?" + EntityUtils.toString(new UrlEncodedFormEntity(pairs, charset));
                }
                httpGet = new HttpGet(url);
                httpResponse = httpClient.execute(httpGet);
                int statusCode = httpResponse.getStatusLine().getStatusCode();
                if (statusCode != 200) { 
                    httpGet.abort();
                    throw new RuntimeException("HttpClient,error status code :" + statusCode);
                }
                entity = httpResponse.getEntity();
            } catch (Exception e) { 
                e.printStackTrace();
            }
            return entity;
        }
    
        private static String formatStr(String text) { 
            return (null == text ? "" : text.trim());
        }
    }