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mrdearmrdear
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增加加密解密相关工具类
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‎Util-Demo/.idea/libraries/Maven__commons_codec_commons_codec_1_10.xml‎

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‎Util-Demo/.idea/libraries/Maven__org_bouncycastle_bcprov_jdk15on_1_52.xml‎

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‎Util-Demo/.idea/workspace.xml‎

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‎Util-Demo/Util-Demo.iml‎

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</content>
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<orderEntry type="inheritedJdk" />
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<orderEntry type="sourceFolder" forTests="false" />
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<orderEntry type="library" name="Maven: org.bouncycastle:bcprov-jdk15on:1.52" level="project" />
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<orderEntry type="library" name="Maven: commons-codec:commons-codec:1.10" level="project" />
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<orderEntry type="library" name="Maven: dom4j:dom4j:1.6.1" level="project" />
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<orderEntry type="library" name="Maven: xml-apis:xml-apis:1.0.b2" level="project" />
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<orderEntry type="library" name="Maven: org.apache.httpcomponents:httpclient:4.5.2" level="project" />
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<orderEntry type="library" name="Maven: org.apache.httpcomponents:httpcore:4.4.4" level="project" />
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<orderEntry type="library" name="Maven: commons-logging:commons-logging:1.2" level="project" />
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<orderEntry type="library" name="Maven: commons-codec:commons-codec:1.9" level="project" />
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<orderEntry type="library" name="Maven: redis.clients:jedis:2.8.0" level="project" />
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<orderEntry type="library" name="Maven: org.apache.commons:commons-pool2:2.3" level="project" />
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<orderEntry type="library" name="Maven: junit:junit:4.12" level="project" />

‎Util-Demo/pom.xml‎

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<version>1.0-SNAPSHOT</version>
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<dependencies>
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<!--RSA依赖-->
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<dependency>
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<groupId>org.bouncycastle</groupId>
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<artifactId>bcprov-jdk15on</artifactId>
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<version>1.52</version>
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</dependency>
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<!--加密解密依赖-->
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<dependency>
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<groupId>commons-codec</groupId>
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<artifactId>commons-codec</artifactId>
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<version>1.10</version>
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</dependency>
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<!--xmlUtil依赖-->
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<dependency>
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<groupId>dom4j</groupId>

‎Util-Demo/src/main/java/cn/mrdear/util/SecurityUtil/AESUtil.java‎

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package cn.mrdear.util.SecurityUtil;
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import org.apache.commons.codec.binary.Base64;
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import java.security.SecureRandom;
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import javax.crypto.Cipher;
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import javax.crypto.KeyGenerator;
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import javax.crypto.spec.SecretKeySpec;
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/**
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* AES工具类
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* 使用base64AndaesEncrypt加密
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* 使用base64AndaesDecrypt解密
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*/
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public class AESUtil {
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/**
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* 测试方法
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* @param args
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* @throws Exception 抛出异常
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*/
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public static void main(String[] args) throws Exception {
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String str = "niuli111";
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String encry = base64AndEncrypt(str,"niuli");
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System.out.println(encry);
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System.out.println(base64AndDecrypt(encry,"niuli"));
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}
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/**
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* AES加密
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*
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* @param content
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* 待加密的内容
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* @param encryptKey
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* 加密密钥
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* @return 加密后的byte[]
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*/
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public static byte[] EncryptToBytes(String content, String encryptKey) {
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return EncryptToBytes(content.getBytes(),encryptKey);
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}
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/**
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* AES加密
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*
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* @param encryptContent
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* 待加密的内容
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* @param encryptKey
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* 加密密钥
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* @return 加密后的byte[]
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*/
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public static byte[] EncryptToBytes(byte[] encryptContent, String encryptKey){
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try {
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return aesByMode(encryptContent,encryptKey, Cipher.ENCRYPT_MODE);
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} catch (Exception e) {
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e.printStackTrace();
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}
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return null;
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}
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/**
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* AES加密为base 64 code
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*
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* @param content
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* 待加密的内容
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* @param encryptKey
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* 加密密钥
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* @return 加密后的base 64 code
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*/
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public static String base64AndEncrypt(String content, String encryptKey){
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return Base64.encodeBase64URLSafeString(EncryptToBytes(content, encryptKey));
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}
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/**
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* AES解密
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*
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* @param encryptBytes
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* 待解密的byte[]
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* @param decryptKey
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* 解密密钥
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* @return 解密后的String
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*/
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public static String DecryptByBytes(byte[] encryptBytes, String decryptKey){
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try {
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byte[] decryptBytes = aesByMode(encryptBytes,decryptKey,Cipher.DECRYPT_MODE);
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return new String(decryptBytes, "UTF-8");
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} catch (Exception e) {
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e.printStackTrace();
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}
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return null;
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}
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/**
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* 根据mode选择解密或者加密
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* @param content 要操作的内容
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* @param key 密钥
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* @param MODE 选择模型 Cipher里面的常量
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* @return 操作后的串
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*/
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private static byte[] aesByMode(byte[] content, String key,Integer MODE) throws Exception {
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KeyGenerator kgen = KeyGenerator.getInstance("AES");
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SecureRandom secureRandom = SecureRandom.getInstance("SHA1PRNG");
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secureRandom.setSeed(key.getBytes());
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//生成128位的key
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kgen.init(128, secureRandom);
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Cipher cipher = Cipher.getInstance("AES");
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cipher.init(MODE, new SecretKeySpec(kgen.generateKey().getEncoded(), "AES"));
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return cipher.doFinal(content);
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}
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/**
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* AES解密
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* @param normalStr 带解密的串
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* @param decryptKey 密钥
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* @return 解密后的string
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*/
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public static String DecryptByStr(String normalStr, String decryptKey){
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return (normalStr==null || "".equals(normalStr)) ? null : DecryptByBytes(normalStr.getBytes(), decryptKey);
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}
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/**
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* 将base 64 code AES解密
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*
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* @param encryptStr
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* 待解密的base 64 code
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* @param decryptKey
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* 解密密钥
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* @return 解密后的string
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*/
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public static String base64AndDecrypt(String encryptStr, String decryptKey){
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return (encryptStr==null || "".equals(encryptStr)) ? null : DecryptByBytes(Base64.decodeBase64(encryptStr), decryptKey);
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}
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}

‎Util-Demo/src/main/java/cn/mrdear/util/SecurityUtil/DigestUtil.java‎

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package cn.mrdear.util.SecurityUtil;
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import org.apache.commons.codec.binary.Hex;
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import org.apache.commons.codec.digest.DigestUtils;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import java.security.MessageDigest;
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import java.security.NoSuchAlgorithmException;
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import java.security.SecureRandom;
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/**
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* 摘要签名工具类
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*/
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public class DigestUtil {
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private static final Logger logger = LoggerFactory.getLogger(DigestUtil.class);
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private static final String SHA1_PRNG = "SHA1PRNG";
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private static SecureRandom sRandom;
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public enum SecurityEnum {
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MD5("MD5"), SHA256("SHA-256"), SHA512("SHA-512"), SHA384("SHA-384"), SHA1("SHA-1"), SHA("SHA");
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SecurityEnum(String value) {
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this.value = value;
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}
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private String value;
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public String getValue() {
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return value;
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}
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}
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static {
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try {
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sRandom = SecureRandom.getInstance(SHA1_PRNG);
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} catch (NoSuchAlgorithmException e) {
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logger.error("生成安全随机数失败:", e);
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}
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}
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/**
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* 生成指定bit的安全随机数
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* @param bits bit位
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* @return 生成结果
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*/
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private static byte[] getNextSecureRandom(int bits) {
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if ((bits % 8) != 0) {
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throw new IllegalArgumentException("Size is not divisible by 8!");
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}
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final byte[] bytes = new byte[bits / 8];
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sRandom.nextBytes(bytes);
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return bytes;
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}
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/**
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* 随机生成指定位数字串
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* @return 生成字串
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*/
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public static String getNextHexRandomNum(int bits) {
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return Hex.encodeHexString(getNextSecureRandom(bits*8));
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}
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/**
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* 根据算法得到相应摘要
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* @param instance 算法
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* @param bytes 需要摘要的内容
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* @return 摘要
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*/
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public static String digest(SecurityEnum instance, byte[] bytes) {
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MessageDigest digestUtils = getInstance(instance);
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digestUtils.update(bytes);
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return byte2String(digestUtils.digest());
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}
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/**
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* 根据算法得到相应摘要
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* @param instance 算法
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* @param content 需要摘要的内容
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* @return 摘要
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*/
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public static String digest(SecurityEnum instance, String content) {
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if (content == null) return "";
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return digest(instance,content.getBytes());
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}
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/**
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* 根据算法拿到一个实现者
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* @param securityEnum 算法
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* @return 实例
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*/
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private static MessageDigest getInstance(SecurityEnum securityEnum){
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MessageDigest digestUtils = null;
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try {
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digestUtils = MessageDigest.getInstance(securityEnum.getValue());
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} catch (NoSuchAlgorithmException e) {
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e.printStackTrace();
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logger.error("不存在的加密算法");
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digestUtils = DigestUtils.getDigest(securityEnum.getValue());
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}
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return digestUtils;
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}
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/**
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* 加密后的内容转成String
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* @param content 内容
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* @return 字符串
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*/
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private static String byte2String(byte[] content){
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StringBuilder hexString = new StringBuilder();
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// 字节数组转换为 十六进制 数
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for (int i = 0; i < content.length; i++) {
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String shaHex = Integer.toHexString(content[i] & 0xFF);
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if (shaHex.length() < 2) {
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hexString.append(0);
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}
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hexString.append(shaHex);
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}
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return hexString.toString();
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}
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}

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