java实现多种加密模式的AES算法-总有一种你用的着
https://blog.csdn.net/u013871100/article/details/80100992
AES-128位-无向量-ECB/PKCS7Padding
package com.debug.steadyjack.springbootMQ.server.util;
import org.apache.commons.codec.binary.Base64;
import javax.crypto.Cipher;
import javax.crypto.spec.SecretKeySpec;
import java.security.Security;
/**
* AES加密算法util
* Created by steadyjack on 2018/4/21.
*/
public class AESUtil {
private static final String EncryptAlg ="AES";
private static final String Cipher_Mode="AES/ECB/PKCS7Padding";
private static final String Encode="UTF-8";
private static final int Secret_Key_Size=32;
private static final String Key_Encode="UTF-8";
/**
* AES/ECB/PKCS7Padding 加密
* @param content
* @param key 密钥
* @return aes加密后 转base64
* @throws Exception
*/
public static String aesPKCS7PaddingEncrypt(String content, String key) throws Exception {
try {
Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());
Cipher cipher = Cipher.getInstance(Cipher_Mode);
byte[] realKey=getSecretKey(key);
cipher.init(Cipher.ENCRYPT_MODE, new SecretKeySpec(realKey,EncryptAlg));
byte[] data=cipher.doFinal(content.getBytes(Encode));
String result=new Base64().encodeToString(data);
return result;
} catch (Exception e) {
e.printStackTrace();
throw new Exception("AES加密失败：content=" +content +" key="+key);
}
}
/**
* AES/ECB/PKCS7Padding 解密
* @param content
* @param key 密钥
* @return 先转base64 再解密
* @throws Exception
*/
public static String aesPKCS7PaddingDecrypt(String content, String key) throws Exception {
try {
//Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());
byte[] decodeBytes=Base64.decodeBase64(content);
Cipher cipher = Cipher.getInstance(Cipher_Mode);
byte[] realKey=getSecretKey(key);
cipher.init(Cipher.DECRYPT_MODE, new SecretKeySpec(realKey,EncryptAlg));
byte[] realBytes=cipher.doFinal(decodeBytes);
return new String(realBytes, Encode);
} catch (Exception e) {
e.printStackTrace();
throw new Exception("AES解密失败：Aescontent = " +e.fillInStackTrace(),e);
}
}
/**
* 对密钥key进行处理：如密钥长度不够位数的则 以指定paddingChar 进行填充；
* 此处用空格字符填充，也可以 0 填充，具体可根据实际项目需求做变更
* @param key
* @return
* @throws Exception
*/
public static byte[] getSecretKey(String key) throws Exception{
final byte paddingChar=' ';
byte[] realKey = new byte[Secret_Key_Size];
byte[] byteKey = key.getBytes(Key_Encode);
for (int i =0;i<realKey.length;i++){
if (i<byteKey.length){
realKey[i] = byteKey[i];
}else {
realKey[i] = paddingChar;
}
}
return realKey;
}
}
————————————————
public static void main(String[] args) throws Exception{
//密钥 加密内容(对象序列化后的内容-json格式字符串)
String key="debug";
String content="{\"domain\":{\"method\":\"getDetails\",\"url\":\"http://www.baidu.com\"},\"name\":\"steadyjack_age\",\"age\":\"23\",\"address\":\"Canada\",\"id\":\"12\",\"phone\":\"15627284601\"}";
String encryptRes=aesPKCS7PaddingEncrypt(content,key);
System.out.println(String.format("加密结果：%s ",encryptRes));
String decryptRes=aesPKCS7PaddingDecrypt(encryptRes,key);
System.out.println(String.format("解密结果：%s ",decryptRes));
}
AES-128位-有向量-CBC/PKCS5Padding
package com.debug.steadyjack.springbootMQ.server.util;
import org.apache.commons.codec.binary.Base64;
import javax.crypto.Cipher;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
import java.io.UnsupportedEncodingException;
/**
* AES加解密工具
* Created by steadyjack on 2018/2/9.
*/
public class EncryptUtil {
private static final String CipherMode="AES/CBC/PKCS5Padding";
private static final String SecretKey="debug";
private static final Integer IVSize=16;
private static final String EncryptAlg ="AES";
private static final String Encode="UTF-8";
private static final int SecretKeySize=32;
private static final String Key_Encode="UTF-8";
/**
* 创建密钥
* @return
*/
private static SecretKeySpec createKey(){
StringBuilder sb=new StringBuilder(SecretKeySize);
sb.append(SecretKey);
if (sb.length()>SecretKeySize){
sb.setLength(SecretKeySize);
}
if (sb.length()<SecretKeySize){
while (sb.length()<SecretKeySize){
sb.append(" ");
}
}
try {
byte[] data=sb.toString().getBytes(Encode);
return new SecretKeySpec(data, EncryptAlg);
}catch (Exception e){
e.printStackTrace();
}
return null;
}
/**
* 创建16位向量: 不够则用0填充
* @return
*/
private static IvParameterSpec createIV() {
StringBuffer sb = new StringBuffer(IVSize);
sb.append(SecretKey);
if (sb.length()>IVSize){
sb.setLength(IVSize);
}
if (sb.length()<IVSize){
while (sb.length()<IVSize){
sb.append("0");
}
}
byte[] data=null;
try {
data=sb.toString().getBytes(Encode);
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
return new IvParameterSpec(data);
}
/**
* 加密：有向量16位，结果转base64
* @param context
* @return
*/
public static String encrypt(String context) {
try {
byte[] content=context.getBytes(Encode);
SecretKeySpec key = createKey();
Cipher cipher = Cipher.getInstance(CipherMode);
cipher.init(Cipher.ENCRYPT_MODE, key, createIV());
byte[] data = cipher.doFinal(content);
String result=Base64.encodeBase64String(data);
return result;
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
/**
* 解密
* @param context
* @return
*/
public static String decrypt(String context) {
try {
byte[] data=Base64.decodeBase64(context);
SecretKeySpec key = createKey();
Cipher cipher = Cipher.getInstance(CipherMode);
cipher.init(Cipher.DECRYPT_MODE, key, createIV());
byte[] content = cipher.doFinal(data);
String result=new String(content,Encode);
return result;
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
public static void main(String[] args) throws Exception{
//密钥 加密内容(对象序列化后的内容-json格式字符串)
String content="{\"domain\":{\"method\":\"getDetails\",\"url\":\"http://www.baidu.com\"},\"name\":\"steadyjack_age\",\"age\":\"23\",\"address\":\"Canada\",\"id\":\"12\",\"phone\":\"15627284601\"}";
String encryptText=encrypt(content);
String decryptText=decrypt(encryptText);
System.out.println(String.format("明文：%s \n加密结果：%s \n解密结果：%s ",content,encryptText,decryptText));
}
}
