RSA 非对称加密
Posted 缤纷世界WB
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篇首语：本文由小常识网(cha138.com)小编为大家整理，主要介绍了RSA 非对称加密相关的知识，希望对你有一定的参考价值。
演示代码：https://pan.baidu.com/s/10rfSUUDEEHvCDEYH0oEVCw
Base64工具类，可以让rsa编码的乱码变成一串字符序列
1 package com.utils;
2
3 import java.io.ByteArrayInputStream;
4 import java.io.ByteArrayOutputStream;
5 import java.io.File;
6 import java.io.FileInputStream;
7 import java.io.FileOutputStream;
8 import java.io.InputStream;
9 import java.io.OutputStream;
10
11 import it.sauronsoftware.base64.Base64;
12
13 /** */
14 /**
15 * <p>
16 * BASE64编码解码工具包
17 * </p>
18 * <p>
19 * 依赖javabase64-1.3.1.jar
20 * </p>
21 *
22 * @author IceWee
23 * @date 2012-5-19
24 * @version 1.0
25 */
26 public class Base64Utils {
27
28 /** */
29 /**
30 * 文件读取缓冲区大小
31 */
32 private static final int CACHE_SIZE = 1024;
33
34 /** */
35 /**
36 * <p>
37 * BASE64字符串解码为二进制数据
38 * </p>
39 *
40 * @param base64
41 * @return
42 * @throws Exception
43 */
44 public static byte[] decode(String base64) throws Exception {
45 return Base64.decode(base64.getBytes());
46 }
47
48 /** */
49 /**
50 * <p>
51 * 二进制数据编码为BASE64字符串
52 * </p>
53 *
54 * @param bytes
55 * @return
56 * @throws Exception
57 */
58 public static String encode(byte[] bytes) throws Exception {
59 return new String(Base64.encode(bytes));
60 }
61
62 /** */
63 /**
64 * <p>
65 * 将文件编码为BASE64字符串
66 * </p>
67 * <p>
68 * 大文件慎用，可能会导致内存溢出
69 * </p>
70 *
71 * @param filePath
72 * 文件绝对路径
73 * @return
74 * @throws Exception
75 */
76 public static String encodeFile(String filePath) throws Exception {
77 byte[] bytes = fileToByte(filePath);
78 return encode(bytes);
79 }
80
81 /** */
82 /**
83 * <p>
84 * BASE64字符串转回文件
85 * </p>
86 *
87 * @param filePath
88 * 文件绝对路径
89 * @param base64
90 * 编码字符串
91 * @throws Exception
92 */
93 public static void decodeToFile(String filePath, String base64) throws Exception {
94 byte[] bytes = decode(base64);
95 byteArrayToFile(bytes, filePath);
96 }
97
98 /** */
99 /**
100 * <p>
101 * 文件转换为二进制数组
102 * </p>
103 *
104 * @param filePath
105 * 文件路径
106 * @return
107 * @throws Exception
108 */
109 public static byte[] fileToByte(String filePath) throws Exception {
110 byte[] data = new byte[0];
111 File file = new File(filePath);
112 if (file.exists()) {
113 FileInputStream in = new FileInputStream(file);
114 ByteArrayOutputStream out = new ByteArrayOutputStream(2048);
115 byte[] cache = new byte[CACHE_SIZE];
116 int nRead = 0;
117 while ((nRead = in.read(cache)) != -1) {
118 out.write(cache, 0, nRead);
119 out.flush();
120 }
121 out.close();
122 in.close();
123 data = out.toByteArray();
124 }
125 return data;
126 }
127
128 /** */
129 /**
130 * <p>
131 * 二进制数据写文件
132 * </p>
133 *
134 * @param bytes
135 * 二进制数据
136 * @param filePath
137 * 文件生成目录
138 */
139 public static void byteArrayToFile(byte[] bytes, String filePath) throws Exception {
140 InputStream in = new ByteArrayInputStream(bytes);
141 File destFile = new File(filePath);
142 if (!destFile.getParentFile().exists()) {
143 destFile.getParentFile().mkdirs();
144 }
145 destFile.createNewFile();
146 OutputStream out = new FileOutputStream(destFile);
147 byte[] cache = new byte[CACHE_SIZE];
148 int nRead = 0;
149 while ((nRead = in.read(cache)) != -1) {
150 out.write(cache, 0, nRead);
151 out.flush();
152 }
153 out.close();
154 in.close();
155 }
156
157 }
RsaUtil工具类，可以调用里面的方法，产生公钥私钥对，和采用公钥加密，私钥加密等
1 package com.utils;
2
3 import java.io.ByteArrayOutputStream;
4 import java.security.Key;
5 import java.security.KeyFactory;
6 import java.security.KeyPair;
7 import java.security.KeyPairGenerator;
8 import java.security.PrivateKey;
9 import java.security.PublicKey;
10 import java.security.Signature;
11 import java.security.interfaces.RSAPrivateKey;
12 import java.security.interfaces.RSAPublicKey;
13 import java.security.spec.PKCS8EncodedKeySpec;
14 import java.security.spec.X509EncodedKeySpec;
15 import java.util.HashMap;
16 import java.util.Map;
17
18 import javax.crypto.Cipher;
19
20 /** */
21 /**
22 * <p>
23 * RSA公钥/私钥/签名工具包
24 * </p>
25 * <p>
26 * 罗纳德·李维斯特（Ron [R]ivest）、阿迪·萨莫尔（Adi [S]hamir）和伦纳德·阿德曼（Leonard [A]dleman）
27 * </p>
28 * <p>
29 * 字符串格式的密钥在未在特殊说明情况下都为BASE64编码格式<br/>
30 * 由于非对称加密速度极其缓慢，一般文件不使用它来加密而是使用对称加密，<br/>
31 * 非对称加密算法可以用来对对称加密的密钥加密，这样保证密钥的安全也就保证了数据的安全
32 * </p>
33 *
34 * @author IceWee
35 * @date 2012-4-26
36 * @version 1.0
37 */
38 public class RSAUtils {
39
40 /** */
41 /**
42 * 加密算法RSA
43 */
44 public static final String KEY_ALGORITHM = "RSA";
45
46 /** */
47 /**
48 * 签名算法
49 */
50 public static final String SIGNATURE_ALGORITHM = "MD5withRSA";
51
52 /** */
53 /**
54 * 获取公钥的key
55 */
56 private static final String PUBLIC_KEY = "RSAPublicKey";
57
58 /** */
59 /**
60 * 获取私钥的key
61 */
62 private static final String PRIVATE_KEY = "RSAPrivateKey";
63
64 /** */
65 /**
66 * RSA最大加密明文大小
67 */
68 private static final int MAX_ENCRYPT_BLOCK = 117;
69
70 /** */
71 /**
72 * RSA最大解密密文大小
73 */
74 private static final int MAX_DECRYPT_BLOCK = 128;
75
76 /** */
77 /**
78 * <p>
79 * 生成密钥对(公钥和私钥)
80 * </p>
81 *
82 * @return
83 * @throws Exception
84 */
85 public static Map<String, Object> genKeyPair() throws Exception {
86 KeyPairGenerator keyPairGen = KeyPairGenerator.getInstance(KEY_ALGORITHM);
87 keyPairGen.initialize(1024);
88 KeyPair keyPair = keyPairGen.generateKeyPair();
89 RSAPublicKey publicKey = (RSAPublicKey) keyPair.getPublic();
90 RSAPrivateKey privateKey = (RSAPrivateKey) keyPair.getPrivate();
91 Map<String, Object> keyMap = new HashMap<String, Object>(2);
92 keyMap.put(PUBLIC_KEY, publicKey);
93 keyMap.put(PRIVATE_KEY, privateKey);
94 return keyMap;
95 }
96
97 /** */
98 /**
99 * <p>
100 * 用私钥对信息生成数字签名
101 * </p>
102 *
103 * @param data
104 * 已加密数据
105 * @param privateKey
106 * 私钥(BASE64编码)
107 *
108 * @return
109 * @throws Exception
110 */
111 public static String sign(byte[] data, String privateKey) throws Exception {
112 byte[] keyBytes = Base64Utils.decode(privateKey);
113 PKCS8EncodedKeySpec pkcs8KeySpec = new PKCS8EncodedKeySpec(keyBytes);
114 KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);
115 PrivateKey privateK = keyFactory.generatePrivate(pkcs8KeySpec);
116 Signature signature = Signature.getInstance(SIGNATURE_ALGORITHM);
117 signature.initSign(privateK);
118 signature.update(data);
119 return Base64Utils.encode(signature.sign());
120 }
121
122 /** */
123 /**
124 * <p>
125 * 校验数字签名
126 * </p>
127 *
128 * @param data
129 * 已加密数据
130 * @param publicKey
131 * 公钥(BASE64编码)
132 * @param sign
133 * 数字签名
134 *
135 * @return
136 * @throws Exception
137 *
138 */
139 public static boolean verify(byte[] data, String publicKey, String sign) throws Exception {
140 byte[] keyBytes = Base64Utils.decode(publicKey);
141 X509EncodedKeySpec keySpec = new X509EncodedKeySpec(keyBytes);
142 KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);
143 PublicKey publicK = keyFactory.generatePublic(keySpec);
144 Signature signature = Signature.getInstance(SIGNATURE_ALGORITHM);
145 signature.initVerify(publicK);
146 signature.update(data);
147 return signature.verify(Base64Utils.decode(sign));
148 }
149
150 /** */
151 /**
152 * <P>
153 * 私钥解密
154 * </p>
155 *
156 * @param encryptedData
157 * 已加密数据
158 * @param privateKey
159 * 私钥(BASE64编码)
160 * @return
161 * @throws Exception
162 */
163 public static byte[] decryptByPrivateKey(byte[] encryptedData, String privateKey) throws Exception {
164 byte[] keyBytes = Base64Utils.decode(privateKey);
165 PKCS8EncodedKeySpec pkcs8KeySpec = new PKCS8EncodedKeySpec(keyBytes);
166 KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);
167 Key privateK = keyFactory.generatePrivate(pkcs8KeySpec);
168 Cipher cipher = Cipher.getInstance(keyFactory.getAlgorithm());
169 cipher.init(Cipher.DECRYPT_MODE, privateK);
170 int inputLen = encryptedData.length;
171 ByteArrayOutputStream out = new ByteArrayOutputStream();
172 int offSet = 0;
173 byte[] cache;
174 int i = 0;
175 // 对数据分段解密
176 while (inputLen - offSet > 0) {
177 if (inputLen - offSet > MAX_DECRYPT_BLOCK) {
178 cache = cipher.doFinal(encryptedData, offSet, MAX_DECRYPT_BLOCK);
179 } else {
180 cache = cipher.doFinal(encryptedData, offSet, inputLen - offSet);
181 }
182 out.write(cache, 0, cache.length);
183 i++;
184 offSet = i * MAX_DECRYPT_BLOCK;
185 }
186 byte[] decryptedData = out.toByteArray();
187 out.close();
188 return decryptedData;
189 }
190
191 /** */
192 /**
193 * <p>
194 * 公钥解密
195 * </p>
196 *
197 * @param encryptedData
198 * 已加密数据
199 * @param publicKey
200 * 公钥(BASE64编码)
201 * @return
202 * @throws Exception
203 */
204 public static byte[] decryptByPublicKey(byte[] encryptedData, String publicKey) throws Exception {
205 byte[] keyBytes = Base64Utils.decode(publicKey);
206 X509EncodedKeySpec x509KeySpec = new X509EncodedKeySpec(keyBytes);
207 KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);
208 Key publicK = keyFactory.generatePublic(x509KeySpec);
209 Cipher cipher = Cipher.getInstance(keyFactory.getAlgorithm());
210 cipher.init(Cipher.DECRYPT_MODE, publicK);
211 int inputLen = encryptedData.length;
212 ByteArrayOutputStream out = new ByteArrayOutputStream();
213 int offSet = 0;
214 byte[] cache;
215 int i = 0;
216 // 对数据分段解密
217 while (inputLen - offSet > 0) {
218 if (inputLen - offSet > MAX_DECRYPT_BLOCK) {
219 cache = cipher.doFinal(encryptedData, offSet, MAX_DECRYPT_BLOCK);
220 } else {
221 cache = cipher.doFinal(encryptedData, offSet, inputLen - offSet);
222 }
223 out.write(cache, 0, cache.length);
224 i++;
225 offSet = i * MAX_DECRYPT_BLOCK;
226 }
227 byte[] decryptedData = out.toByteArray();
228 out.close();
229 return decryptedData;
230 }
231
232 /** */
233 /**
234 * <p>
235 * 公钥加密
236 * </p>
237 *
238 * @param data
239 * 源数据
240 * @param publicKey
241 * 公钥(BASE64编码)
242 * @return
243 * @throws Exception
244 */
245 public static byte[] encryptByPublicKey(byte[] data, String publicKey) throws Exception {
246 byte[] keyBytes = Base64Utils.decode(publicKey);
247 X509EncodedKeySpec x509KeySpec = new X509EncodedKeySpec(keyBytes);
248 KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);
249 Key publicK = keyFactory.generatePublic(x509KeySpec);
250 // 对数据加密
251 Cipher cipher = Cipher.getInstance(keyFactory.getAlgorithm());
252 cipher.init(Cipher.ENCRYPT_MODE, publicK);
253 int inputLen = data.length;
254 ByteArrayOutputStream out = new ByteArrayOutputStream();
255 int offSet = 0;
256 byte[] cache;
257 int i = 0;
258 // 对数据分段加密
259 while (inputLen - offSet > 0) {
260 if (inputLen - offSet > MAX_ENCRYPT_BLOCK) {
261 cache = cipher.doFinal(data, offSet, MAX_ENCRYPT_BLOCK);
262 } else {
263 cache = cipher.doFinal(data, offSet, inputLen - offSet);
264 }
265 out.write(cache, 0, cache.length);
266 i++;
267 offSet = i * MAX_ENCRYPT_BLOCK;
268 }
269 byte[] encryptedData = out.toByteArray();
270 out.close();
271 return encryptedData;
272 }
273
274 /** */
275 /**
276 * <p>
277 * 私钥加密
278 * </p>
279 *
280 * @param data
281 * 源数据
282 * @param privateKey
283 * 私钥(BASE64编码)
284 * @return
285 * @throws Exception
286 */
287 public static byte[] encryptByPrivateKey(byte[] data, String privateKey) throws Exception {
288 byte[] keyBytes = Base64Utils.decode(privateKey);
289 PKCS8EncodedKeySpec pkcs8KeySpec = new PKCS8EncodedKeySpec(keyBytes);
290 KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);
291 Key privateK = keyFactory.generatePrivate(pkcs8KeySpec);
292 Cipher cipher = Cipher.getInstance(keyFactory.getAlgorithm());
293 cipher.init(Cipher.ENCRYPT_MODE, privateK);
294 int inputLen = data.length;
295 ByteArrayOutputStream out = new ByteArrayOutputStream();
296 int offSet = 0;
297 byte[] cache;
298 int i = 0;
299 // 对数据分段加密
300 while (inputLen - offSet > 0) {
301 if (inputLen - offSet > MAX_ENCRYPT_BLOCK) {
302 cache = cipher.doFinal(data, offSet, MAX_ENCRYPT_BLOCK);
303 } else {
304 cache = cipher.doFinal(data, offSet, inputLen - offSet);
305 }
306 out.write(cache, 0, cache.length);
307 i++;
308 offSet = i * MAX_ENCRYPT_BLOCK;
309 }
310 byte[] encryptedData = out.toByteArray();
311 out.close();
312 return encryptedData;
313 }
314
315 /** */
316 /**
317 * <p>
318 * 获取私钥
319 * </p>
320 *
321 * @param keyMap
322 * 密钥对
323 * @return
324 * @throws Exception
325 */
326 public static String getPrivateKey(Map<String, Object> keyMap) throws Exception {
327 Key key = (Key) keyMap.get(PRIVATE_KEY);
328 return Base64Utils.encode(key.getEncoded());
329 }
330
331 /** */
332 /**
333 * <p>
334 * 获取公钥
335 * </p>
336 *
337 * @param keyMap
338 * 密钥对
339 * @return
340 * @throws Exception
341 */
342 public static String getPublicKey(Map<String, Object> keyMap) throws Exception {
343 Key key = (Key) keyMap.get(PUBLIC_KEY);
344 return Base64Utils.encode(key.getEncoded());
345 }
346
347 /**
348 * java端公钥加密
349 */
350 public static String encryptedDataOnJava(String data, String PUBLICKEY) {
351 try {
352 data = Base64Utils.encode(encryptByPublicKey(data.getBytes(), PUBLICKEY));
353 } catch (Exception e) {
354 // TODO Auto-generated catch block
355 e.printStackTrace();
356 }
357 return data;
358 }
359
360 /**
361 * java端私钥解密
362 */
363 public static String decryptDataOnJava(String data, String PRIVATEKEY) {
364 String temp = "";
365 try {
366 byte[] rs = Base64Utils.decode(data);
367 temp = new String(RSAUtils.decryptByPrivateKey(rs, PRIVATEKEY),"UTF-8"); //以utf-8的方式生成字符串
368
369 } catch (Exception e) {
370 e.printStackTrace();
371 }
372 return temp;
373 }
374
375 }
json工具类
1 package com.utils;
2
3 import com.google.gson.Gson;
4 import com.google.gson.GsonBuilder;
5 import com.google.gson.JsonNull;
6
7 public class JsonUtil {
8
9 private static Gson gson = new GsonBuilder().setDateFormat("yyyy-MM-dd").serializeNulls().create();
10
11 /**
12 * @MethodName : toJson
13 * @Description : 将对象转为JSON串，此方法能够满足大部分需求
14 * @param src
15 * :将要被转化的对象
16 * @return :转化后的JSON串
17 */
18 public static String toJson(Object src) {
19 if (src == null) {
20 return gson.toJson(JsonNull.INSTANCE);
21 }
22 return gson.toJson(src);
23 }
24 }
到这一步我们的工具类准备的差不多了，可以开始进入我们的主题了，java端Rsa测试类和web端交互的demo了
Rsa测试java测试类
1 package com.test;
2
3 import java.util.Map;
4
5 import org.junit.Test;
6
7 import com.utils.Base64Utils;
8 import com.utils.RSAUtils;
9
10 public class RSATester {
11
12 static String publicKey;
13 static String privateKey;
14
15 static {
16 try {
17 Map<String, Object> keyMap = RSAUtils.genKeyPair();
18 publicKey = RSAUtils.getPublicKey(keyMap);
19 privateKey = RSAUtils.getPrivateKey(keyMap);
20 System.err.println("公钥: \\n\\r" + publicKey);
21 System.err.println("私钥： \\n\\r" + privateKey);
22 } catch (Exception e) {
23 e.printStackTrace();
24 }
25 }
26
27 public static void main(String[] args) throws Exception {
28 testJavaRsa();
29 }
30
31 @Test
32 public void tests() throws Exception {
33 String data = "hNYdT0/8wxljGvLQVPYUDeoWS217rmB5msKOljb6OBsOhdL1Domxt6Sy3BqdGqS3StGJuZuQ9wEFzGdyoTQ7IRiC0gRrkLuxvCUq8FANt1JpJCBqvzLdQD/ygCjkJMWWkMU4EFUW3xYkAsidqM8Zynhpk+mdja3789Ng4s68xJI=";
34
35 String privateKey = "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";
36 byte[] rs = Base64Utils.decode(data);
37
38 String r1 = new String(RSAUtils.decryptByPrivateKey(rs, privateKey));
39
40 System.out.println("\\r\\n\\r\\n" + r1 + "okb");
41
42 }
43
44 static void testSign() throws Exception {
45 System.err.println("私钥加密——公钥解密");
46 String source = "32232";
47 System.out.println("原文字：\\r\\n" + source);
48 byte[] data = source.getBytes();
49 byte[] encodedData = RSAUtils.encryptByPrivateKey(data, privateKey);
50 System.out.println("加密后：\\r\\n" + new String(encodedData));
51 byte[] decodedData = RSAUtils.decryptByPublicKey(encodedData, publicKey);
52 String target = new String(decodedData);
53 System.out.println("解密后: \\r\\n" + target);
54 System.err.println("私钥签名——公钥验证签名");
55 String sign = RSAUtils.sign(encodedData, privateKey);
56 System.err.println("签名:\\r" + sign);
57 boolean status = RSAUtils.verify(encodedData, publicKey, sign);
58 System.err.println("验证结果:\\r" + status);
59 }
60
61 static void test() throws Exception {
62 System.err.println("公钥加密——私钥解密");
63 String source = "这是一行没有任何意义的文字，你看完了等于没看，不是吗？";
64 System.out.println("\\r加密前文字：\\r\\n" + source);
65 byte[] data = source.getBytes();
66 byte[] encodedData = RSAUtils.encryptByPublicKey(data, publicKey);
67 System.out.println("加密后文字：\\r\\n" + new String(encodedData));
68 System.out.println("----------------:base64处理：" + Base64Utils.encode(encodedData));
69 byte[] decodedData = RSAUtils.decryptByPrivateKey(encodedData, privateKey);
70 String target = new String(decodedData);
71 System.out.println("解密后文字: \\r\\n" + target);
72 }
73
74 /*
75 * 测试自己封装java端加密和解密的方法
76 */
77
78 static void testJavaRsa() {
79 String PUBLICKEY = "MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCcd+0zTY9Gn94iqkQJTlxYnEnCeFsLkk0a7hoAvi2B74VzDVV3xH0ZO9RkXvo1SgCB+uzbEWdrgQkzTqyjfTtgOguu3OnkVxIMJF34ibchTY0LWHGxq1m2gLGuVVqrlu1LtdV0X7xo/5zc8Mr+46veWb86kSpqe6rOAm69WWo5GwIDAQAB";
80 String PRIVATEKEY = "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";
81 String data = "你好啊，冯老师！s 223 1@324234234sfsfsf";
82 data = RSAUtils.encryptedDataOnJava(data, PUBLICKEY);
83 System.out.println("加密数据：" + data);
84
85 System.out.println("解密数据：" + RSAUtils.decryptDataOnJava(data, PRIVATEKEY));
86 }
87
88 static void testFrontEncrptAndAfterDecrypt() {
89 String PRIVATEKEY = "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";
90 String data = "FBGU7sQfpSfCgB2hqFuIqkivEUHVRHD8JFdyxYeWqQHsTj9UEuVmvi28n1fOHRwW+3aZD3ttdzfUHWiXD2NErcX/CYs5BtSXT7RcJfWWcXvegq5BBDEAJCADWCRdYnblN+SLUC+ctDXcLw4xmjwAajowSzhCfY/lU3TdnJjO488=";
91 System.out.println("解密数据：" + RSAUtils.decryptDataOnJava(data, PRIVATEKEY));
92 }
93
94 }
前端加密jsp页面
1 <%@ page language="java" contentType="text/html; charset=UTF-8" 2 pageEncoding="UTF-8"%> 3 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> 4 <html> 5 <head> 6 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 7 <title>Insert title here</title> 8 <script src="js/jquery-2.1.3.js"></script> 9 <script src="js/jsencrypt.min.js"></script> 10 </head> 11 <body> 12 13 <script type="text/javascript"> 14 $(function() { 15 $("#bt").click( 16 function() { 17 18 var encrypt = new JSEncrypt(); 19 encrypt.setPublicKey($("#publickey").val()); 20 encrypt.setPrivateKey($("#privatekey").val()); 21 var password = $("#password").val(); 22 var uname = $("#uname").val(); 23 password = encrypt.encrypt(password); 24 25 uname = encrypt.encrypt(uname); 26 $("#jmName").val(uname); 27 $("#jmPasswrod").val(password); 28 var jsonData = { 29 "password" : password, 30 "uname" : uname 31 }; 32 33 $.post("jiemi.do", jsonData, function(result) { 34 alert("解密的用户名：" + result.uname + "\\n" + "解密的密码：" 35 + result.password); 36 37 }, \'json\'); 38 }); 39 }); 40 </script> 41 <h2>公钥：</h2> 42 <textarea id="publickey" rows="5" cols="45">MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCJ9s1qlOyv9qpuaTqauW6fUftzE50rVk3yVPZwv1aO1Ch/XSEz76xCwkyvqpaqceRXrPpdBmO5+ruJ+I8osOHo7L5GWEOcMOO+8izp9hXKBBrmRMD4Egpn00k9DhVIEKp/vyddZPS/doxB8onhN6poTJDLdFLFVEicMf52caN9GQIDAQAB 43 </textarea> 44 <h2>私钥</h2> 45 <textarea rows="10" cols="45" id="privatekey">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</textarea> 46 <hr /> 47 <form> 48 用户名：<input type="text" name="uname" id="uname" /> 密码：<input 49 type="text" name="password" id="password" /> 50 <hr /> 51 用户密文 52 <textarea id="jmName"> 53 </textarea> 54 密码密文 55 <textarea id="jmPasswrod"> 56 </textarea> 57 <input type="button" id="bt" value="提交" /> 58 </form> 59 60 </body> 61 </html>
后端servlet解密
1 package com;
2
3 import java.io.IOException;
4 import java.util.HashMap;
5
6 import javax.servlet.ServletException;
7 import javax.servlet.http.HttpServlet;
8 import javax.servlet.http.HttpServletRequest;
9 import javax.servlet.http.HttpServletResponse;
10
11 import com.utils.JsonUtil;
12 import com.utils.RSAUtils;
13
14 /**
15 * Servlet implementation class JieMiServlet
16 */
17 public class JieMiServlet extends HttpServlet {
18 private static final long serialVersionUID = 1L;
19
20 protected void doGet(HttpServletRequest request, HttpServletResponse response)
21 throws ServletException, IOException {
22 doPost(request, response);
23 }
24
25 protected void doPost(HttpServletRequest request, HttpServletResponse response)
26 throws ServletException, IOException {
27 // 获取数据
28 String uname = request.getParameter("uname");
29 String password = request.getParameter("password");
30 String PRIVATEKEY = "MIICdgIBADANBgkqhkiG9w0BAQEFAASCAmAwggJcAgEAAoGBAIn2zWqU7K/2qm5pOpq5bp9R+3MTnStWTfJU9nC/Vo7UKH9dITPvrELCTK+qlqpx5Fes+l0GY7n6u4n4jyiw4ejsvkZYQ5ww477yLOn2FcoEGuZEwPgSCmfTST0OFUgQqn+/J11k9L92jEHyieE3qmhMkMt0UsVUSJwx/nZxo30ZAgMBAAECgYBD3YHigeuEC4R+14iaf8jo2j0kuGtB3Cxvnlez0otTqw1YyYkBsU49cLKkXvfKVEgM0Ow/QltgKvSBxCE31PrrDka5TygVMqqA/IM7NrDvjUcGLjyoeNmLA8660fWcDxUTlAGN5kxIvUATayVwKVflpWPWu0FPKsWrZustnEo+4QJBAMCmYsWqAKWYMVRXFP3/XGRfio8DV793TOckyBSN9eh8UhgoZyT3u7oeHmDJEwm4aNMHlg1Pcdc6tNsvi1FRCiUCQQC3VNzfF4xOtUgX7vWPL8YVljLuXmy12iVYmg6ofu9l31nwM9FLQ1TRFglvF5LWrIXTQb07PgGd5DJMAQWGsqLlAkAPE7Z9M73TN+L8b8hDzJ1leZi1cpSGdoa9PEKwYR/SrxAZtefEm+LEQSEtf+8OfrEtetWCeyo0pvKKiOEFXytFAkEAgynL/DC0yXsZYUYtmYvshHU5ayFTVagFICbYZeSrEo+BoUDxdI9vl0fU6A5NmBlGhaZ65G+waG5jLc1tTrlvoQJAXBEoPcBNAosiZHQfYBwHqU6mJ9/ZacJh3MtJzGGebfEwJgtln5b154iANqNWXpySBLvkK+Boq7FYRiD83pqmUg==";
31 // 解密
32 uname = RSAUtils.decryptDataOnJava(uname, PRIVATEKEY);
33 password = RSAUtils.decryptDataOnJava(password, PRIVATEKEY);
34 // 用map封装返回的数据
35 HashMap<String, Object> result = new HashMap<String, Object>();
36 result.put("uname", uname);
37 result.put("password", password);
38
39 response.getWriter().print(JsonUtil.toJson(result));
40
41 }
42
43 }
转自【https://www.cnblogs.com/nanyangke-cjz/p/5898361.html】
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