java使用RSA与AES加密解密
生活随笔
收集整理的這篇文章主要介紹了
java使用RSA与AES加密解密
小編覺得挺不錯(cuò)的,現(xiàn)在分享給大家,幫大家做個(gè)參考.
首先了解下，什么是堆成加密，什么是非對(duì)稱加密？
對(duì)稱加密：加密與解密的密鑰是相同的，加解密速度很快，比如AES
非對(duì)稱加密：加密與解密的秘鑰是不同的，速度較慢，比如RSA
先看代碼（先會(huì)用在研究）
相關(guān)依賴：
<dependency>
<groupId>org.bouncycastle</groupId>
<artifactId>bcprov-jdk15on</artifactId>
<version>1.58</version>
</dependency>
1，RSA工具類：
package cn.wangtao.utils; import org.bouncycastle.jce.provider.BouncyCastleProvider;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory; import javax.crypto.Cipher;
import java.io.ByteArrayOutputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectOutputStream;
import java.security.*;
import java.security.interfaces.RSAPrivateKey;
import java.security.interfaces.RSAPublicKey; /**
* @ClassName RSAUtils
* @Auth 桃子
* @Date 2019-6-25 15:15
* @Version 1.0
* @Description
**/
public class RSAUtils { private static final String RSA = "RSA"; // 加密方式
private static final Logger logger= LoggerFactory.getLogger(RSAUtils.class); //獲取密鑰
public static KeyPair getKey() throws Exception {
try {
KeyPairGenerator keyPairGenerator = KeyPairGenerator.getInstance(RSA, new BouncyCastleProvider());
keyPairGenerator.initialize(2048); // 初始化密鑰長(zhǎng)度
KeyPair keyPair = keyPairGenerator.generateKeyPair();// 生成密鑰對(duì)
return keyPair;
} catch (Exception e) {
logger.error("獲取RSA秘鑰對(duì)異常",e);
throw new Exception("獲取RSA秘鑰對(duì)異常",e);
}
} //利用公鑰進(jìn)行加密
public static String encryptStr(RSAPublicKey publicKey, String str) throws Exception {
try {
Cipher cipher = Cipher.getInstance(RSA, new BouncyCastleProvider());
cipher.init(Cipher.ENCRYPT_MODE, publicKey);
//加密
byte[] bytes = getBytes(str.getBytes(), cipher);
//2進(jìn)行轉(zhuǎn)換成16進(jìn)制
String result = CommonUtils.parseByte2HexStr(bytes);
return result;
} catch (Exception e) {
logger.error("使用RSA公鑰進(jìn)行加密異常",e);
throw new Exception("使用RSA公鑰進(jìn)行加密異常",e);
}
} //利用私鑰進(jìn)行解密
public static String decryptStr(RSAPrivateKey privateKey, String str) throws Exception {
try {
Cipher cipher = Cipher.getInstance(RSA, new BouncyCastleProvider());
cipher.init(Cipher.DECRYPT_MODE, privateKey); // 用密鑰初始化此Cipher對(duì)象
//16進(jìn)制轉(zhuǎn)換成2進(jìn)制
byte[] bytes = CommonUtils.parseHexStr2Byte(str);
//解密
byte[] bs = getBytes(bytes, cipher);
String content=new String(bs,"utf-8");
return content;
} catch (Exception e) {
logger.error("使用RSA私鑰進(jìn)行解密異常",e);
throw new Exception("使用RSA私鑰進(jìn)行解密異常",e);
}
} //通過cipher獲取字節(jié)數(shù)組
public static byte[] getBytes(byte[] bytes,Cipher cipher) throws Exception {
int blockSize = cipher.getBlockSize(); // 返回塊的大小
int j = 0;
ByteArrayOutputStream baos = new ByteArrayOutputStream();
while (bytes.length - j * blockSize > 0) { // 將二進(jìn)制數(shù)據(jù)分塊寫入ByteArrayOutputStream中
if(bytes.length-j*blockSize>blockSize){
baos.write(cipher.doFinal(bytes, j * blockSize, blockSize));
}else{
baos.write(cipher.doFinal(bytes, j * blockSize,bytes.length-j*blockSize));
}
j++;
}
baos.close();
byte[] byteArray = baos.toByteArray();
return byteArray;
} //保存秘鑰對(duì)到文件
public void saveRSAKey(String fileName) throws Exception {
FileOutputStream fos=null;
ObjectOutputStream oos=null;
try {
KeyPair keyPair = getKey();
fos=new FileOutputStream(fileName);
oos=new ObjectOutputStream(fos); //對(duì)象序列號(hào)
oos.writeObject(keyPair);
} catch (Exception e) {
logger.error("RSA秘鑰對(duì)保存到文件異常[{}]",fileName,e);
throw new Exception("RSA秘鑰對(duì)保存到文件異常",e);
}finally {
if(oos!=null){
try {
oos.close();
} catch (IOException e1) {
e1.printStackTrace();
}
}
if(fos!=null){
try {
fos.close();
} catch (IOException e1) {
e1.printStackTrace();
}
}
}
} }
/**
* @ClassName RSAUtils
* @Version 1.0
* @Description RSA工具類
**/
public class RSAUtils { private static final String RSA = "RSA"; public static final String MD5WITHRSA="MD5withRSA"; public static final String SHA1WITHRSA="SHA1withRSA"; private static Logger logger= LoggerFactory.getLogger(RSAUtils.class); /**
* @desc 讀取秘鑰文本內(nèi)容
* @createTime 2019年7月2日 下午5:20:38
* @param keyFile 秘鑰文件
* @return 秘鑰文本內(nèi)容
* @throws Exception
*/
private static String initKeyByFile(File keyFile) throws Exception { if(keyFile.exists() && keyFile.isFile()) {
BufferedReader bufferedReader = null;
try {
bufferedReader = new BufferedReader(new FileReader(keyFile));
StringBuilder stringBuilder = new StringBuilder(); String line = null;
while ((line = bufferedReader.readLine()) != null) {
if (line.length() == 0 || line.charAt(0) == '-') {
continue;
}
stringBuilder.append(line).append(System.getProperty("line.separator"));
}
return stringBuilder.toString();
}catch (Exception e) {
logger.error("讀取秘鑰文本內(nèi)容異常",e);
throw new Exception("讀取秘鑰文本內(nèi)容異常",e);
}finally {
CommonUtils.closeReaderandWriter(bufferedReader, null);
}
}
return null;
} /**
* @desc 獲取公鑰
* @author Liuweian
* @createTime 2019年7月2日 下午5:19:34
* @param pubKeyFileName 公鑰文件地址
* @return PublicKey
* @throws Exception
*/
public static PublicKey getPublicKeyByFile(File pubKeyFile) throws Exception {
String keyContent = initKeyByFile(pubKeyFile);
byte[] keyByte = Base64.decode(keyContent);
KeyFactory kf = KeyFactory.getInstance(RSA);
X509EncodedKeySpec keySpec = new X509EncodedKeySpec(keyByte);
return kf.generatePublic(keySpec);
} /**
* @desc 獲取私鑰
* @createTime 2019年7月2日 下午5:19:16
* @param priKeyFileName 私鑰文件地址
* @return PrivateKey
* @throws Exception
*/
public static PrivateKey getPrivateKeyByFile(File priKeyFile) throws Exception {
String keyContent = initKeyByFile(priKeyFile);
byte[] keyByte = Base64.decode(keyContent);
KeyFactory kf = KeyFactory.getInstance(RSA);
PKCS8EncodedKeySpec keySpec = new PKCS8EncodedKeySpec(keyByte);
return kf.generatePrivate(keySpec);
} /**
* @desc 使用RSA中的私鑰對(duì)數(shù)據(jù)簽名
* @createTime 2019年7月2日 下午5:24:30
* @param privateKey 秘鑰對(duì)中的私鑰
* @param data 待加簽字節(jié)數(shù)組
* @param signType 加簽類型
* @return 加簽后的簽名
* @throws Exception
*/
public static String sign(byte[] data, PrivateKey privateKey, String signType) throws Exception {
Signature signature = Signature.getInstance(signType);
signature.initSign(privateKey);
signature.update(data);
byte[] signByte = signature.sign();
//Base64加密
return new String(Base64.encode(signByte));
} /**
* @desc 使用RSA中的公鑰對(duì)簽名驗(yàn)簽
* @createTime 2019年7月2日 下午5:24:30
* @param data 待驗(yàn)簽字節(jié)數(shù)組
* @param sign 簽名
* @param publicKey 秘鑰對(duì)中的公鑰
* @param signType 加簽類型
* @return 驗(yàn)簽是否成功
* @throws Exception
*/
public static boolean verify(byte[] data, byte[] sign, PublicKey publicKey, String signType) {
try {
Signature signature = Signature.getInstance(signType);
signature.initVerify(publicKey);
signature.update(data);
//Base64解密
byte[] keyByte = Base64.decode(sign);
return signature.verify(keyByte);
} catch (Exception e) {
logger.error("驗(yàn)簽出現(xiàn)異常", e);
return false;
}
} /**
* @desc 使用RSA中的私鑰對(duì)數(shù)據(jù)簽名 加簽方式 MD5withRSA
* @createTime 2019年7月2日 下午5:24:30
* @param privateKey 秘鑰對(duì)中的私鑰
* @param data 待加簽字節(jié)數(shù)組
* @return 加簽后的簽名
* @throws Exception
*/
public static String signMD5withRSA(byte[] data, PrivateKey privateKey) throws Exception {
return sign(data, privateKey, MD5WITHRSA);
} /**
* @desc 使用RSA中的公鑰對(duì)簽名驗(yàn)簽 驗(yàn)簽方式 MD5withRSA
* @createTime 2019年7月2日 下午5:24:30
* @param sign 簽名
* @param publicKey 秘鑰對(duì)中的公鑰
* @param signType 加簽類型
* @return 驗(yàn)簽是否成功，失敗則異常拋出
* @throws Exception
*/
public static void verifyMD5withRSA(byte[] data, byte[] sign, PublicKey publicKey) throws Exception {
if(!verify(data, sign, publicKey, MD5WITHRSA)) {
throw new Exception("驗(yàn)簽失敗");
}
} /**
* @desc 通過cipher獲取字節(jié)數(shù)組 分塊
* @createTime 2019年7月2日 下午5:21:33
* @param data 待加密的字節(jié)數(shù)組
* @param cipher
* @return
* @throws Exception
*/
public static byte[] getBytes(byte[] data, Cipher cipher) throws Exception {
int blockSize = cipher.getBlockSize(); // 返回塊的大小
int j = 0;
ByteArrayOutputStream baos = new ByteArrayOutputStream();
while (data.length - j * blockSize > 0) { // 將二進(jìn)制數(shù)據(jù)分塊寫入ByteArrayOutputStream中
if(data.length - j * blockSize > blockSize) {
baos.write(cipher.doFinal(data, j * blockSize, blockSize));
}else{
baos.write(cipher.doFinal(data, j * blockSize, data.length - j * blockSize));
}
j++;
}
baos.close();
byte[] byteArray = baos.toByteArray();
return byteArray;
} /**
* @desc 利用公鑰進(jìn)行 加密
* @createTime 2019年7月2日 下午5:24:30
* @param key 密鑰對(duì)的一個(gè)
* @param data 待加密字節(jié)數(shù)組
* @return 密文
* @throws Exception
*/
public static String encrypt(Key key, byte[] data) throws Exception {
try {
Cipher cipher = Cipher.getInstance(RSA, new BouncyCastleProvider());
cipher.init(Cipher.ENCRYPT_MODE, key);
//加密
byte[] bytes = getBytes(data, cipher);
//2進(jìn)行轉(zhuǎn)換成16進(jìn)制
String result = CommonUtils.parseByte2HexStr(bytes);
return new String(Base64.encode(result.getBytes(CommonUtils.CODE_TYPE)));
} catch (Exception e) {
logger.error("使用RSA公鑰進(jìn)行加密異常",e);
throw new Exception("使用RSA公鑰進(jìn)行加密異常",e);
}
} /**
* @desc 利用私鑰進(jìn)行 解密
* @createTime 2019年7月2日 下午5:23:10
* @param key 密鑰對(duì)的一個(gè)
* @param data 待解密的字節(jié)數(shù)組
* @return 明文
* @throws Exception
*/
public static String decrypt(Key key, byte[] data) throws Exception {
try {
Cipher cipher = Cipher.getInstance(RSA, new BouncyCastleProvider());
cipher.init(Cipher.DECRYPT_MODE, key); // 用密鑰初始化此Cipher對(duì)象
//16進(jìn)制轉(zhuǎn)換成2進(jìn)制
byte[] bytes = CommonUtils.parseHexStr2Byte(Base64.decode(data));
//解密
byte[] bs = getBytes(bytes, cipher);
String content=new String(bs,CommonUtils.CODE_TYPE);
return content;
} catch (Exception e) {
logger.error("使用RSA私鑰進(jìn)行解密異常",e);
throw new Exception("使用RSA私鑰進(jìn)行解密異常",e);
}
} }
2，CommonUtils通用工具類：
package cn.wangtao.utils; import org.slf4j.Logger;
import org.slf4j.LoggerFactory; import java.io.IOException;
import java.io.Reader;
import java.io.Writer; /**
* @ClassName CommonUtils
* @Auth 桃子
* @Date 2019-6-27 12:51
* @Version 1.0
* @Description
**/
public class CommonUtils { private static final Logger logger= LoggerFactory.getLogger(CommonUtils.class);
//編碼方式
public static final String CODE_TYPE = "UTF-8"; //字符補(bǔ)全
private static final String[] consult = new String[]{"0","1","2","3","4","5","6","7","8","9","A","B","C","D","E","F","G"}; //關(guān)流
public static void closeReaderandWriter(Reader reader, Writer writer){
if(writer!=null){
try {
writer.close();
} catch (IOException e) {
logger.error("關(guān)閉輸出流失敗",e);
}
}
if(reader!=null){
try {
reader.close();
} catch (IOException e) {
logger.error("關(guān)閉輸出流失敗",e);
}
}
} //將16進(jìn)制轉(zhuǎn)換為二進(jìn)制
public static byte[] parseHexStr2Byte(String hexStr) {
if (hexStr.length() < 1)
return null;
byte[] result = new byte[hexStr.length()/2];
for (int i = 0;i< hexStr.length()/2; i++) {
int high = Integer.parseInt(hexStr.substring(i*2, i*2+1), 16);
int low = Integer.parseInt(hexStr.substring(i*2+1, i*2+2), 16);
result[i] = (byte) (high * 16 + low);
}
return result;
} //將二進(jìn)制轉(zhuǎn)換成16進(jìn)制
public static String parseByte2HexStr(byte buf[]) {
StringBuffer sb = new StringBuffer();
for (int i = 0; i < buf.length; i++) {
String hex = Integer.toHexString(buf[i] & 0xFF);
if (hex.length() == 1) {
hex = '0' + hex;
}
sb.append(hex.toUpperCase());
}
return sb.toString();
} //補(bǔ)全字符
public static String completionCodeFor16Bytes(String str) throws Exception {
try{
int num = str.getBytes(CODE_TYPE).length;
int index = num%16;
//進(jìn)行加密內(nèi)容補(bǔ)全操作, 加密內(nèi)容應(yīng)該為 16字節(jié)的倍數(shù), 當(dāng)不足16*n字節(jié)是進(jìn)行補(bǔ)全, 差一位時(shí) 補(bǔ)全16+1位
//補(bǔ)全字符 以 $ 開始,$后一位代表$后補(bǔ)全字符位數(shù),之后全部以0進(jìn)行補(bǔ)全;
if(index != 0){
StringBuffer sbBuffer = new StringBuffer(str);
if(16-index == 1){
sbBuffer.append("$" + consult[16-1] + addStr(16-1-1));
}else{
sbBuffer.append("$" + consult[16-index-1] + addStr(16-index-1-1));
}
str = sbBuffer.toString();
}
return str;
}catch (Exception e){
logger.error("使用AES加密前補(bǔ)全字符異常",e);
throw new Exception("使用AES加密前補(bǔ)全字符異常",e);
}
} //追加字符
public static String addStr(int num){
StringBuffer sbBuffer = new StringBuffer("");
for (int i = 0; i < num; i++) {
sbBuffer.append("0");
}
return sbBuffer.toString();
} //還原字符(進(jìn)行字符判斷)
public static String resumeCodeOf16Bytes(String str) throws Exception{
int indexOf = str.lastIndexOf("$");
if(indexOf == -1){
return str;
}
String trim = str.substring(indexOf+1,indexOf+2).trim();
int num = 0;
for (int i = 0; i < consult.length; i++) {
if(trim.equals(consult[i])){
num = i;
}
}
if(num == 0){
return str;
}
return str.substring(0,indexOf).trim();
} }
3，AESUtils通用工具類：
package cn.wangtao.utils; import org.slf4j.Logger;
import org.slf4j.LoggerFactory; import javax.crypto.Cipher;
import javax.crypto.spec.SecretKeySpec;
import java.io.*;
import java.security.interfaces.RSAPrivateKey;
import java.util.Map; /**
* @ClassName AESUtils
* @Auth 桃子
* @Date 2019-6-27 12:05
* @Version 1.0
* @Description
**/
public class AESUtils { private static final Logger logger= LoggerFactory.getLogger(AESUtils.class); //填充類型
public static final String AES_TYPE = "AES/ECB/PKCS5Padding"; private static final String AES = "AES"; // 加密方式 public static final String DES_TYPE = "DES/ECB/PKCS5Padding"; private static final String DES = "DES"; // 加密方式 private final String defaultDesKey="11112222";//8位 //對(duì)字符串加密
public static String encryptStr(String content,String aesKey) throws Exception {
try {
SecretKeySpec key = new SecretKeySpec(aesKey.getBytes(),AES );
Cipher cipher = Cipher.getInstance(AES_TYPE);
cipher.init(Cipher.ENCRYPT_MODE, key);
//字符補(bǔ)全
String content16Str = CommonUtils.completionCodeFor16Bytes(content);
byte[] encryptedData = cipher.doFinal(content16Str.getBytes(CommonUtils.CODE_TYPE));
//2進(jìn)制轉(zhuǎn)換成16進(jìn)制
String hexStr = CommonUtils.parseByte2HexStr(encryptedData);
return hexStr;
} catch (Exception e) {
logger.error("使用AES對(duì)字符串加密異常",e);
throw new Exception("使用AES對(duì)字符串加密異常",e);
} }
//對(duì)字符串解密
public static String decryptStr(String content,String aesKey) throws Exception {
try {
//16進(jìn)制轉(zhuǎn)換成2進(jìn)制
byte[] bytes = CommonUtils.parseHexStr2Byte(content);
SecretKeySpec key = new SecretKeySpec(
aesKey.getBytes(), AES);
Cipher cipher = Cipher.getInstance(AES_TYPE);
cipher.init(Cipher.DECRYPT_MODE, key);
byte[] decryptedData = cipher.doFinal(bytes);
String result=new String(decryptedData, CommonUtils.CODE_TYPE);
//還原字符
String orgResult = CommonUtils.resumeCodeOf16Bytes(result);
return orgResult;
} catch (Exception e) {
logger.error("使用AES對(duì)字符串解密異常",e);
throw new Exception("使用AES對(duì)字符串解密異常",e);
}
} //對(duì)文件加密
public static File encryptFile(File orgFile, File encryptFile, Map<String,Object> context) throws Exception {
logger.info("使用AES對(duì)文件加密開始，源文件地址[{}]加密后文件地址[{}]",orgFile.getPath(),encryptFile.getPath());
BufferedReader br=null;
BufferedWriter bw=null;
try{
//獲取AESKEY ，如果沒有為默認(rèn)
String aesKey = (String) context.get(Dirt.AES_KEY);
br=new BufferedReader(new FileReader(orgFile)); bw=(BufferedWriter)context.get(Dirt.BUFFEREDWRITER);
if(null==bw){
bw=new BufferedWriter(new FileWriter(encryptFile));
}
String len=null;
while (null!=(len=br.readLine())){
String encrypt= encryptStr(len,aesKey);
bw.write(encrypt);
bw.newLine();
bw.flush();
}
logger.info("使用AES對(duì)文件加密結(jié)束，源文件地址[{}]加密后文件地址[{}]",orgFile.getPath(),encryptFile.getPath());
return encryptFile;
}catch (Exception e){
logger.error("使用AES對(duì)文件加密異常,源文件地址[{}]加密后文件地址[{}]",orgFile.getPath(),encryptFile.getPath(),e);
throw new Exception("使用AES對(duì)文件加密異常",e);
}finally {
CommonUtils.closeReaderandWriter(br,bw);
}
} //對(duì)文本解密，返回解密文件后的文件
public static File decryptFile(File decryptfile, File encryptFile,Map<String,Object> context) throws Exception {
logger.info("使用AES對(duì)文件解密開始，源加密文件地址[{}]解密后文件地址[{}]",encryptFile.getPath(),decryptfile.getPath());
BufferedReader br=null;
BufferedWriter bw=null;
try{
if(decryptfile.exists()){
decryptfile.delete();
}
//邊讀邊加密邊寫
br=new BufferedReader(new FileReader(encryptFile));
bw=new BufferedWriter(new FileWriter(decryptfile)); String len=null;
String aesKey=null;
//判斷是否加密
RSAPrivateKey privateKey= (RSAPrivateKey) context.get(Dirt.RSAPRIVATEKEY);
if(null!=privateKey){
StringBuffer sb=new StringBuffer();
while ((len=br.readLine())!=null){
sb.append(len);
if(len.equals("\n")||len.equals("")||len.equals("\r\n")||len.equals("\r")){
aesKey=RSAUtils.decryptStr(privateKey,sb.toString());
break;
}
}
}
if(null==aesKey){
aesKey=(String) context.get(Dirt.AES_KEY);
}
logger.info("aesKey[{}]",aesKey);
if(aesKey!=null){
while ((len=br.readLine())!=null){
String decrypt= decryptStr(len,aesKey);
bw.write(decrypt);
bw.flush();
bw.newLine();
}
}
logger.info("使用AES對(duì)文件解密結(jié)束，源加密文件地址[{}]解密后文件地址[{}]",encryptFile.getPath(),decryptfile.getPath());
return decryptfile;
}catch (Exception e){
logger.error("使用AES對(duì)文件解密異常,源加密文件地址[{}]解密后文件地址[{}]",encryptFile.getPath(),decryptfile.getPath(),e);
throw new Exception("使用AES對(duì)文件解密異常",e);
}finally {
CommonUtils.closeReaderandWriter(br,bw);
}
}
}
/**
* @ClassName AESUtils
* @Version 1.0
* @Description AES工具類
**/
public class AESUtils { private static final Logger logger = LoggerFactory.getLogger(AESUtils.class); /** 加密方式 */
public static final String AES = "AES"; public static final String AES_Type = "AES/ECB/PKCS5Padding"; /**
* @desc 隨機(jī)生成AES加密秘鑰
* @createTime 2019年7月2日 下午5:36:00
* @return 隨機(jī)的AES的秘鑰串 16位
* @throws Exception
*/
public static String getAesKey() {
Random random = new Random();
String result = "";
for(int i = 0; i< 16; i++){
String charOrNum = random.nextInt(2) % 2 == 0 ? "char" : "num";
// 輸出字母還是數(shù)字
if( "char".equalsIgnoreCase(charOrNum) ) {
// 輸出是大寫字母還是小寫字母
// int temp = random.nextInt(2) % 2 == 0 ? 65 : 97;
result += (char)(random.nextInt(26) + 65);
} else {
result += String.valueOf(random.nextInt(10));
}
}
return result;
} /**
* @desc AES加密操作
* @createTime 2019年7月2日 下午5:30:33
* @param data 待加密字節(jié)數(shù)組
* @param aesKey 秘鑰串
* @return 密文
* @throws Exception
*/
public static String encrypt(byte[] data, String aesKey) throws Exception {
try {
SecretKeySpec key = new SecretKeySpec(aesKey.getBytes(CommonUtils.CODE_TYPE), AES);
Cipher cipher = Cipher.getInstance(AES);
cipher.init(Cipher.ENCRYPT_MODE, key);
byte[] encryptedData = cipher.doFinal(data);
//2進(jìn)制轉(zhuǎn)換成16進(jìn)制并返回密文
String result = CommonUtils.parseByte2HexStr(encryptedData);
return new String(Base64.encode(result.getBytes(CommonUtils.CODE_TYPE)));
} catch (Exception e) {
logger.error("使用AES對(duì)字符串加密異常", e);
throw new Exception("使用AES對(duì)字符串加密異常", e);
}
} /**
* @desc AES解密操作
* @createTime 2019年7月2日 下午5:31:37
* @param data 待解密字節(jié)數(shù)組
* @param aesKey 秘鑰串
* @return 明文
* @throws Exception
*/
public static String decrypt(byte[] data, String aesKey) throws Exception {
try {
// 16進(jìn)制轉(zhuǎn)換成2進(jìn)制
byte[] bytes = CommonUtils.parseHexStr2Byte(Base64.decode(data)); SecretKeySpec key = new SecretKeySpec(aesKey.getBytes(CommonUtils.CODE_TYPE), AES);
Cipher cipher = Cipher.getInstance(AES);
cipher.init(Cipher.DECRYPT_MODE, key);
//執(zhí)行解密
byte[] decryptedData = cipher.doFinal(bytes);
//還原字符并返回
return new String(decryptedData, CommonUtils.CODE_TYPE);
} catch (Exception e) {
logger.error("使用AES對(duì)字符串解密異常", e);
throw new Exception("使用AES對(duì)字符串解密異常", e);
}
} }
4，Dirt常量
package cn.wangtao.utils; import java.security.interfaces.RSAPublicKey; /**
* @ClassName Dirt
* @Auth 桃子
* @Date 2019-6-27 14:20
* @Version 1.0
* @Description
**/
public class Dirt {
public static final String UPLOADFILEURL="uploadFileUrl";
public static final String AES_KEY="aesKey";
public static final String RSAPUBLICKEY="rsaPublicKey";
public static final String RSAPRIVATEKEY="rsaPrivateKey"; public final static String RETURNCODE="returnCode";
public final static String RETURNMSG="returnMsg";
public final static String FILENAME="fileName";
public final static String ORGFILENAME="orgFileName";
public final static String ENCRYPTFILE="encryptFile"; public static final String BUFFEREDWRITER="bufferedWriter"; //是為了在原始文件中進(jìn)行補(bǔ)充加密 //返回碼
public final static String SUCCESSCODE="000000";
public final static String FAILEDCODE="999999"; //加密文件所放的目錄
public final static String BASELOCALDIR="XXX"; //基本目錄路徑
public final static String ENCRYPTLOCALDIR="encrypt"; //加密文件目錄 }
AES的介紹
詳情請(qǐng)參考：https://blog.csdn.net/qq_28205153/article/details/55798628
RSA的介紹
詳情請(qǐng)參考：https://www.cnblogs.com/jiftle/p/7903762.html
總結(jié)
以上是生活随笔為你收集整理的java使用RSA与AES加密解密的全部?jī)?nèi)容，希望文章能夠幫你解決所遇到的問題。
- 上一篇： 土壤含水量监测仪器：合理进行灌溉和土壤改
- 下一篇： 土壤墒情自动监测仪：实现远程监测和数据传