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RSA 实现数据加密解密以及Token管理

boonya 分享于 2016-08-02

推荐:RSA加密、解密

using System; using System.Collections.Generic; using System.Text; using System.Security.Cryptography; using System.IO; namespace Lib.Encryption { ///

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RSA加密解密key都是成对出现的,一个公钥,一个私钥,并且加密解密一般是公钥加密私钥解密。 1.RSA加密工具 package com.wlyd.fmcgwms.util.api;import java.io.ByteArrayOutputStream;import java.security.Key;import java.security.KeyFactory;import java.security.KeyPair;import java.security.KeyPairGenerator;import java.security.PrivateKey;import java.security.PublicKey;import java.security.Signature;import java.security.interfaces.RSAPrivateKey;import java.security.interfaces.RSAPublicKey;import java.security.spec.PKCS8EncodedKeySpec;import java.security.spec.X509EncodedKeySpec;import java.util.HashMap;import java.util.Map;import javax.crypto.Cipher;/** * <p> * RSA公钥/私钥/签名工具包 * </p> * <p> * 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) * </p> * <p> * 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/> * 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/> * 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 * </p> *

* @author IceWee * @date 2012-4-26 * @version 1.0 */public class RSAUtils {

/**

* 加密算法RSA

*/

public static final String KEY_ALGORITHM = "RSA";

/**

* 签名算法

*/

public static final String SIGNATURE_ALGORITHM = "MD5withRSA";

/**

* 获取公钥的key

*/

private static final String PUBLIC_KEY = "RSAPublicKey";

/**

* 获取私钥的key

*/

private static final String PRIVATE_KEY = "RSAPrivateKey";

/**

* RSA最大加密明文大小

*/

private static final int MAX_ENCRYPT_BLOCK = 117;

/**

* RSA最大解密密文大小

*/

private static final int MAX_DECRYPT_BLOCK = 128;

/**

* <p>

* 生成密钥对(公钥和私钥)

* </p>

*

* @return

* @throws Exception

*/

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

KeyPairGenerator keyPairGen = KeyPairGenerator

.getInstance(KEY_ALGORITHM);

keyPairGen.initialize(1024);

KeyPair keyPair = keyPairGen.generateKeyPair();

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

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;

}

/**

* <p>

* 用私钥对信息生成数字签名

* </p>

*

* @param data

*

已加密数据

* @param privateKey

*

私钥(BASE64编码)

*

* @return

* @throws Exception

*/

public static String sign(byte[] data, String privateKey) throws Exception {

byte[] keyBytes = Base64Utils.decode(privateKey);

PKCS8EncodedKeySpec pkcs8KeySpec = new PKCS8EncodedKeySpec(keyBytes);

KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);

PrivateKey privateK = keyFactory.generatePrivate(pkcs8KeySpec);

Signature signature = Signature.getInstance(SIGNATURE_ALGORITHM);

signature.initSign(privateK);

signature.update(data);

return Base64Utils.encode(signature.sign());

}

/**

* <p>

* 校验数字签名

* </p>

*

* @param data

*

已加密数据

* @param publicKey

*

公钥(BASE64编码)

* @param sign

*

数字签名

*

* @return

* @throws Exception

*

*/

public static boolean verify(byte[] data, String publicKey, String sign)

throws Exception {

byte[] keyBytes = Base64Utils.decode(publicKey);

X509EncodedKeySpec keySpec = new X509EncodedKeySpec(keyBytes);

KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);

PublicKey publicK = keyFactory.generatePublic(keySpec);

Signature signature = Signature.getInstance(SIGNATURE_ALGORITHM);

signature.initVerify(publicK);

signature.update(data);

return signature.verify(Base64Utils.decode(sign));

}

/**

* <P>

* 私钥解密

* </p>

*

* @param encryptedData

*

已加密数据

* @param privateKey

*

私钥(BASE64编码)

* @return

* @throws Exception

*/

public static byte[] decryptByPrivateKey(byte[] encryptedData,

String privateKey) throws Exception {

byte[] keyBytes = Base64Utils.decode(privateKey);

PKCS8EncodedKeySpec pkcs8KeySpec = new PKCS8EncodedKeySpec(keyBytes);

KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);

Key privateK = keyFactory.generatePrivate(pkcs8KeySpec);

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

cipher.init(Cipher.DECRYPT_MODE, privateK);

int inputLen = encryptedData.length;

ByteArrayOutputStream out = new ByteArrayOutputStream();

int offSet = 0;

byte[] cache;

int i = 0;

// 对数据分段解密

while (inputLen - offSet > 0) {

if (inputLen - offSet > MAX_DECRYPT_BLOCK) {

cache = cipher

.doFinal(encryptedData, offSet, MAX_DECRYPT_BLOCK);

} else {

cache = cipher

.doFinal(encryptedData, offSet, inputLen - offSet);

}

out.write(cache, 0, cache.length);

i++;

offSet = i * MAX_DECRYPT_BLOCK;

}

byte[] decryptedData = out.toByteArray();

out.close();

return decryptedData;

}

/**

* <p>

* 公钥解密

* </p>

*

* @param encryptedData

*

已加密数据

* @param publicKey

*

公钥(BASE64编码)

* @return

* @throws Exception

*/

public static byte[] decryptByPublicKey(byte[] encryptedData,

String publicKey) throws Exception {

byte[] keyBytes = Base64Utils.decode(publicKey);

X509EncodedKeySpec x509KeySpec = new X509EncodedKeySpec(keyBytes);

KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);

Key publicK = keyFactory.generatePublic(x509KeySpec);

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

cipher.init(Cipher.DECRYPT_MODE, publicK);

int inputLen = encryptedData.length;

ByteArrayOutputStream out = new ByteArrayOutputStream();

int offSet = 0;

byte[] cache;

int i = 0;

// 对数据分段解密

while (inputLen - offSet > 0) {

if (inputLen - offSet > MAX_DECRYPT_BLOCK) {

cache = cipher

.doFinal(encryptedData, offSet, MAX_DECRYPT_BLOCK);

} else {

cache = cipher

.doFinal(encryptedData, offSet, inputLen - offSet);

}

out.write(cache, 0, cache.length);

i++;

offSet = i * MAX_DECRYPT_BLOCK;

}

byte[] decryptedData = out.toByteArray();

out.close();

return decryptedData;

}

/**

* <p>

* 公钥加密

* </p>

*

* @param data

*

源数据

* @param publicKey

*

公钥(BASE64编码)

* @return

* @throws Exception

*/

public static byte[] encryptByPublicKey(byte[] data, String publicKey)

throws Exception {

byte[] keyBytes = Base64Utils.decode(publicKey);

X509EncodedKeySpec x509KeySpec = new X509EncodedKeySpec(keyBytes);

KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);

Key publicK = keyFactory.generatePublic(x509KeySpec);

// 对数据加密

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

cipher.init(Cipher.ENCRYPT_MODE, publicK);

int inputLen = data.length;

ByteArrayOutputStream out = new ByteArrayOutputStream();

int offSet = 0;

byte[] cache;

int i = 0;

// 对数据分段加密

while (inputLen - offSet > 0) {

if (inputLen - offSet > MAX_ENCRYPT_BLOCK) {

cache = cipher.doFinal(data, offSet, MAX_ENCRYPT_BLOCK);

} else {

cache = cipher.doFinal(data, offSet, inputLen - offSet);

}

out.write(cache, 0, cache.length);

i++;

offSet = i * MAX_ENCRYPT_BLOCK;

}

byte[] encryptedData = out.toByteArray();

out.close();

return encryptedData;

}

/**

* <p>

* 私钥加密

* </p>

*

* @param data

*

源数据

* @param privateKey

*

私钥(BASE64编码)

* @return

* @throws Exception

*/

public static byte[] encryptByPrivateKey(byte[] data, String privateKey)

throws Exception {

byte[] keyBytes = Base64Utils.decode(privateKey);

PKCS8EncodedKeySpec pkcs8KeySpec = new PKCS8EncodedKeySpec(keyBytes);

KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);

Key privateK = keyFactory.generatePrivate(pkcs8KeySpec);

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

cipher.init(Cipher.ENCRYPT_MODE, privateK);

int inputLen = data.length;

ByteArrayOutputStream out = new ByteArrayOutputStream();

int offSet = 0;

byte[] cache;

int i = 0;

// 对数据分段加密

while (inputLen - offSet > 0) {

if (inputLen - offSet > MAX_ENCRYPT_BLOCK) {

cache = cipher.doFinal(data, offSet, MAX_ENCRYPT_BLOCK);

} else {

cache = cipher.doFinal(data, offSet, inputLen - offSet);

}

out.write(cache, 0, cache.length);

i++;

offSet = i * MAX_ENCRYPT_BLOCK;

}

byte[] encryptedData = out.toByteArray();

out.close();

return encryptedData;

}

/**

* <p>

* 获取私钥

* </p>

*

* @param keyMap

*

密钥对

* @return

* @throws Exception

*/

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

throws Exception {

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

return Base64Utils.encode(key.getEncoded());

}

/**

* <p>

* 获取公钥

* </p>

*

* @param keyMap

*

密钥对

* @return

* @throws Exception

*/

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

throws Exception {

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

return Base64Utils.encode(key.getEncoded());

}} 2.Token管理工具 package com.wlyd.fmcgwms.util;import java.sql.T

推荐:RSA 加密解密总结

http://blog.csdn.net/ydmdzq_helloworld/article/details/6699328 参考以上文章实现。 1.GenerateRSAKey(1024, priKey, pubKey, seed);

函数调用后会生成pri,

imestamp;import java.util.Date;import java.util.Map;import java.util.concurrent.ConcurrentHashMap;import com.wlyd.fmcgwms.persistence.beans.api.AccessToken;import com.wlyd.fmcgwms.util.api.RSAUtils;/** * SAAS Token管理工具 *

* @packge com.wlyd.wmscloud.util.SAASTokenManager * @date 2016年5月6日 上午10:20:01 * @author pengjunlin * @comment * @update */public class SAASTokenManager {

/**

* Token存储对象,保持5000个并发容量(K-useraccount@corCode,V-token)

*/

public static Map<String, Object> map = new ConcurrentHashMap<String, Object>(

5000);

/**

* 获取用户Token

*

* @MethodName: getToken

* @Description:

* @param key

* @return

* @throws

*/

public static AccessToken getToken(String key) {

if (map.containsKey(key)) {

return (AccessToken) map.get(key);

}

return null;

}

/**

* 添加用户token

*

* @MethodName: putToken

* @Description:

* @param key

*

useraccount@corCode

* @param accessToken

* @throws

*/

public static void putToken(String key, AccessToken accessToken) {

map.put(key, accessToken);

}

/**

* 移除token

*

* @MethodName: removeToken

* @Description:

* @param key

*

useraccount@corCode

* @throws

*/

public static void removeToken(String key) {

if (map.containsKey(key)) {

map.remove(key);

}

}

/**

* 验证Token是否过期

*

* @MethodName: isVlidateToken

* @Description:

* @param key

*

useraccount@corCode

* @return

* @throws

*/

public static boolean isVlidateToken(String key) {

if (map.containsKey(key)) {

AccessToken accessToken = (AccessToken) map.get(key);

long currentTimestamp = new Date().getTime();

// 有效时间两小时

if (accessToken.getLongTime() - currentTimestamp > 2 * 3600 * 1000) {

return false;

}

return true;

}

return false;

}

/**

* 更新Token

*

* @MethodName: reputToken

* @Description:

* @param key

*

useraccount@corCode

* @param accessToken

* @return

* @throws

*/

public static void reputToken(String key, AccessToken accessToken) {

if (map.containsKey(key)) {

putToken(key, accessToken);

}

}

/**

* 更新Token

*

* @MethodName: reputToken

* @Description:

* @param key

*

useraccount@corCode

* @param tokenStr

* @return

* @throws

*/

public static void reputToken(String key, String tokenStr) {

if (map.containsKey(key)) {

AccessToken accessToken = new AccessToken();

accessToken.setToken(tokenStr);

accessToken.setTimestamp(new Timestamp(new Date().getTime()));

putToken(key, accessToken);

}

}

/**

* 是否包含用户token

* @MethodName: iscontainKey

* @Description:

* @param key

*

useraccount@corCode

* @return

* @throws

*/

public static boolean iscontainKey(String key){

return map.containsKey(key);

}

/**

* 生成RSA加密 Token

*

* @MethodName: generateToken

* @Description:

* @param platformCode

* @param tenantCode

* @return

* @throws

*/

public static String generateToken(String publicKey,String platformCode,String tenantCode){

String str=platformCode+tenantCode+new Date().getTime();

try {

byte [] bytes= RSAUtils.encryptByPublicKey(str.getBytes(),publicKey);

return new String( bytes ,"UTF-8");

} catch (Exception e) {

e.printStackTrace();

}

return null;

}

/**

* @throws Exception

* 测试函数入口

*

* @MethodName: main

* @Description:

* @param args

* @throws

*/

public static void main(String[] args) throws Exception {

System.out.println(Md5.getMD5Str("123456"));

String key = "wmsadmin@10000";

AccessToken accessToken = new AccessToken();

accessToken.setToken("token==xxjisifdihfifdds");

accessToken.setTimestamp(new Timestamp(new Date().getTime()));

putToken(key, accessToken);

AccessToken accessToken2 = getToken(key);

System.out.println("token:" + accessToken2.getToken());

System.out.println("isValidate:" + isVlidateToken(key));

Map<String, Object> keyMap=RSAUtils.genKeyPair();

String publicKey=RSAUtils.getPublicKey(keyMap);

String privateKey=RSAUtils.getPrivateKey(keyMap);

String token=generateToken(publicKey,"abcdefghijklmnopqrstuvwxyz", "10000");

System.out.println("RSA Token:"+token);

System.out.println("加密:"+new String(RSAUtils.encryptByPublicKey("this is data".getBytes(), publicKey),"UTF-8"));

System.out.println("明文:"+new String(RSAUtils.decryptByPrivateKey(RSAUtils.encryptByPublicKey("this is data".getBytes(), publicKey), privateKey)));

}} 3.Token实体对象 package com.wlyd.fmcgwms.persistence.beans.api;import java.io.Serializable;import java.sql.Timestamp;/** * SAAS Token WMS管理实体 *

* @packge com.wlyd.wmscloud.persistence.beans.api.AccessToken * @date 2016年5月6日 上午10:27:55 * @author pengjunlin * @comment * @update */public class AccessToken implements Serializable{

/**

*

*/

private static final long serialVersionUID = 4759692267927548118L;

private String token;// AccessToken字符串

private Timestamp timestamp;// 时间戳(用于验证token和重新获取token)

public String getToken() {

return token;

}

public void setToken(String token) {

this.token = token;

}

public Timestamp getTimestamp() {

return timestamp;

}

public void setTimestamp(Timestamp timestamp) {

this.timestamp = timestamp;

}

public long getLongTime(){

if(timestamp!=null){

return timestamp.getTime();

}

return 0;

}} RSA使用时记住:公钥加密私钥解密。 4.Base64Utils package com.wlyd.fmcgwms.util.api;import java.io.ByteArrayInputStream;import java.io.ByteArrayOutputStream;import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.InputStream;import java.io.OutputStream;import org.bouncycastle.util.encoders.Base64;/**

* <p>

* BASE64编码解码工具包

* </p>

* <p>

* 依赖javabase64-1.3.1.jar

* </p>

*

* @author IceWee

* @date 2012-5-19

* @version 1.0

*/

public class Base64Utils {

/**

* 文件读取缓冲区大小

*/

private static final int CACHE_SIZE = 1024;

/**

* <p>

* BASE64字符串解码为二进制数据

* </p>

*

* @param base64

* @return

* @throws Exception

*/

public static byte[] decode(String base64) throws Exception {

return Base64.decode(base64.getBytes());

}

/**

* <p>

* 二进制数据编码为BASE64字符串

* </p>

*

* @param bytes

* @return

* @throws Exception

*/

public static String encode(byte[] bytes) throws Exception {

return new String(Base64.encode(bytes));

}

/**

* <p>

* 将文件编码为BASE64字符串

* </p>

* <p>

* 大文件慎用,可能会导致内存溢出

* </p>

*

* @param filePath 文件绝对路径

* @return

* @throws Exception

*/

public static String encodeFile(String filePath) throws Exception {

byte[] bytes = fileToByte(filePath);

return encode(bytes);

}

/**

* <p>

* BASE64字符串转回文件

* </p>

*

* @param filePath 文件绝对路径

* @param base64 编码字符串

* @throws Exception

*/

public static void decodeToFile(String filePath, String base64) throws Exception {

byte[] bytes = decode(base64);

byteArrayToFile(bytes, filePath);

}

/**

* <p>

* 文件转换为二进制数组

* </p>

*

* @param filePath 文件路径

* @return

* @throws Exception

*/

public static byte[] fileToByte(String filePath) throws Exception {

byte[] data = new byte[0];

File file = new File(filePath);

if (file.exists()) {

FileInputStream in = new FileInputStream(file);

ByteArrayOutputStream out = new ByteArrayOutputStream(2048);

byte[] cache = new byte[CACHE_SIZE];

int nRead = 0;

while ((nRead = in.read(cache)) != -1) {

out.write(cache, 0, nRead);

out.flush();

}

out.close();

in.close();

data = out.toByteArray();

}

return data;

}

/**

* <p>

* 二进制数据写文件

* </p>

*

* @param bytes 二进制数据

* @param filePath 文件生成目录

*/

public static void byteArrayToFile(byte[] bytes, String filePath) throws Exception {

InputStream in = new ByteArrayInputStream(bytes);

File destFile = new File(filePath);

if (!destFile.getParentFile().exists()) {

destFile.getParentFile().mkdirs();

}

destFile.createNewFile();

OutputStream out = new FileOutputStream(destFile);

byte[] cache = new byte[CACHE_SIZE];

int nRead = 0;

while ((nRead = in.read(cache)) != -1) {

out.write(cache, 0, nRead);

out.flush();

}

out.close();

in.close();

}

}Base64的工具网上很多,随便找了个用的。

推荐:RSA加密解密

和后台弄人脸识别这一块时真是欲仙欲死。NND,一直想记录一下,以免以后再掉坑里,拖了个把月才写,真是拖延症加懒癌晚期。网上找的找了很久只有加密,没解密,

RSA加密解密key都是成对出现的,一个公钥,一个私钥,并且加密解密一般是公钥加密私钥解密。 1.RSA加密工具 package com.wlyd.fmcgwms.util.api;import java.io.ByteArrayOutputStream;impor

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