package com.lzw.aes;
import java.io.UnsupportedEncodingException;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.spec.SecretKeySpec;
/**
* 此处使用AES-128-ECB加密模式,key需要为16位。
* @author lzw
* @Date 2019年10月18日
*/
public class Aes {
/**
* @param args
* @throws Exception
*/
public static void main(String[] args) throws Exception {
//密钥
String cKey = "1234567890defghi";
// 需要加密的字串
String cSrc = "Abc123";
System.out.println(cSrc);
// 加密
String enString = Aes.Encrypt(cSrc, cKey);
System.out.println("加密后的字串是:" + enString);
// 解密
String DeString = Aes.Decrypt(enString, cKey);
System.out.println("解密后的字串是:" + DeString);
}
/**
* 二进制转换成十六进制
*
* @param buf
* @return
*/
private 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();
}
/**
* 加密
* @param sSrc 待加密的密码
* @param sKey 解密密钥
* @return
* @throws Exception
*/
public static String Encrypt(String sSrc, String sKey) {
try {
byte[] raw = sKey.getBytes("ASCII");
SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");//"算法/模式/补码方式"
cipher.init(Cipher.ENCRYPT_MODE, skeySpec);
byte[] encrypted = cipher.doFinal(sSrc.getBytes("utf-8"));
return parseByte2HexStr(encrypted);
} catch (IllegalBlockSizeException e) {
e.printStackTrace();
} catch (BadPaddingException e) {
e.printStackTrace();
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (InvalidKeyException e) {
e.printStackTrace();
} catch (NoSuchPaddingException e) {
e.printStackTrace();
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
}
return null;
}
/**
* 解密
*
* @param sSrc
* 待解密的密码
* @param sKey
* 解密密钥
* @return
* @throws Exception
*/
public static String Decrypt(String sSrc, String sKey) {
try {
byte[] raw = sKey.getBytes("utf-8");
SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
cipher.init(Cipher.DECRYPT_MODE, skeySpec);
byte[] encrypted = parseHexStr2Byte(sSrc);
byte[] original = cipher.doFinal(encrypted);
return new String(original, "utf-8");
} catch (IllegalBlockSizeException e) {
e.printStackTrace();
} catch (BadPaddingException e) {
e.printStackTrace();
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (InvalidKeyException e) {
e.printStackTrace();
} catch (NoSuchPaddingException e) {
e.printStackTrace();
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
}
return null;
}
/**
* 十六进制转换成二进制
*
* @param hexStr
* @return
*/
private 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;
}
}
Java 使用AES加密解密
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转载自blog.csdn.net/weixin_42228950/article/details/102625674
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