@@ -1,214 +0,0 @@
package com.ccag.utils ;
import lombok.extern.slf4j.Slf4j ;
import org.bouncycastle.jce.provider.BouncyCastleProvider ;
import org.springframework.stereotype.Component ;
import javax.crypto.* ;
import javax.crypto.spec.SecretKeySpec ;
import java.io.InputStream ;
import java.io.OutputStream ;
import java.security.NoSuchAlgorithmException ;
import java.security.SecureRandom ;
import java.security.Security ;
import java.util.Base64 ;
@Slf4j
@Component
public class AESUtil {
private static final String FINAL_PARAM = " XzKRqYnUypdE8VJ41yo/i0rMpZ0IlztSZ1PqWhr0q/c= " ;
/**
* 块大小固定为8字节
*/
private final static String AES_CBC_PKCS5PADDING = " RSA/ECB/OAEPWITHSHA-256ANDMGF1PADDING " ;
/**
* 加密字符串
*
* @param content 加密数据
* @return 密文
* @throws Exception
*/
public static String encode ( String content ) throws Exception {
byte [ ] key = Base64 . getDecoder ( ) . decode ( FINAL_PARAM ) ;
byte [ ] data = content . getBytes ( ) ;
SecretKeySpec secretKeySpec = new SecretKeySpec ( key , " AES " ) ;
Cipher cipher = Cipher . getInstance ( AES_CBC_PKCS5PADDING ) ;
cipher . init ( Cipher . ENCRYPT_MODE , secretKeySpec ) ;
return Base64 . getEncoder ( ) . encodeToString ( cipher . doFinal ( data ) ) ;
}
/**
* 解密字符串
*
* @param content 密文
* @return 解密后的数据
* @throws Exception
*/
public static String decode ( String content ) throws Exception {
byte [ ] key = Base64 . getDecoder ( ) . decode ( FINAL_PARAM ) ;
SecretKeySpec secretKeySpec = new SecretKeySpec ( key , " AES " ) ;
Cipher cipher = Cipher . getInstance ( " AES/ECB/PKCS5Padding " ) ;
cipher . init ( Cipher . DECRYPT_MODE , secretKeySpec ) ;
return new String ( cipher . doFinal ( Base64 . getDecoder ( ) . decode ( content ) ) ) ;
}
/**
* 生成随机密钥
*
* @return
*/
public static SecretKey keyGenerator ( ) {
KeyGenerator keyGenerator = null ;
try {
keyGenerator = KeyGenerator . getInstance ( " AES " ) ;
} catch ( NoSuchAlgorithmException e ) {
throw new RuntimeException ( e ) ;
}
keyGenerator . init ( 256 , new SecureRandom ( ) ) ;
return keyGenerator . generateKey ( ) ;
}
// public static void main(String[] args) {
// try {
// String ret = encode("03BD691EB0264CECF79");
// System.out.println("encode:" + ret);
// String raw = decode(ret);
// System.out.println("decode:" + raw);
// } catch (Exception e) {
// throw new RuntimeException(e);
// }
// }
/**
* get Cipher
*
* @param mode
* @param sKey
* @return
*/
private static Cipher getCipher ( int mode , String sKey ) {
byte [ ] IV = new byte [ 16 ] ;
SecureRandom random = new SecureRandom ( ) ;
random . nextBytes ( IV ) ;
Cipher cipher = null ;
try {
cipher = Cipher . getInstance ( AES_CBC_PKCS5PADDING ) ;
cipher . init ( mode , getSecretKeySpec ( sKey ) ) ;
} catch ( Exception e ) {
e . printStackTrace ( ) ;
}
return cipher ;
}
/**
* 通过Skey得到秘钥算法对象
*
* @param sKey
* @return
*/
private static SecretKeySpec getSecretKeySpec ( String sKey ) {
SecretKeySpec key = null ;
try {
//"AES"：请求的密钥算法的标准名称
KeyGenerator kgen = KeyGenerator . getInstance ( " AES " ) ;
//256： ； ：
SecureRandom securerandom = SecureRandom . getInstance ( " SHA1PRNG " ) ;
securerandom . setSeed ( sKey . getBytes ( ) ) ;
kgen . init ( 256 , securerandom ) ;
//生成秘密（对称）密钥
SecretKey secretKey = kgen . generateKey ( ) ;
//返回基本编码格式的密钥
byte [ ] enCodeFormat = secretKey . getEncoded ( ) ;
//根据给定的字节数组构造一个密钥。enCodeFormat： ；
key = new SecretKeySpec ( enCodeFormat , " AES " ) ;
//将提供程序添加到下一个可用位置
Security . addProvider ( new BouncyCastleProvider ( ) ) ;
} catch ( Exception e ) {
e . printStackTrace ( ) ;
}
return key ;
}
/**
* 上传文件加密(传入文件流，输出流对象后直接处理即加密文件流后存储文件)
*
* @param inputStream
* @param outputStream
* @return
*/
public static boolean encryptFile ( InputStream inputStream , OutputStream outputStream , String key ) {
try {
CipherInputStream cipherInputStream = new CipherInputStream ( inputStream , getCipher ( Cipher . ENCRYPT_MODE , key ) ) ;
byte [ ] cache = new byte [ 1024 ] ;
int nRead = 0 ;
while ( ( nRead = cipherInputStream . read ( cache ) ) ! = - 1 ) {
outputStream . write ( cache , 0 , nRead ) ;
outputStream . flush ( ) ;
}
cipherInputStream . close ( ) ;
} catch ( Exception e ) {
e . printStackTrace ( ) ;
}
return true ;
}
/**
* **上传文件加密(传入字节，加密后返回字节)**
*
* @param plainFile
* @return
* @throws Exception
*/
public static byte [ ] encryptFile ( byte [ ] plainFile , String key ) {
byte [ ] cipherText = null ;
try {
cipherText = getCipher ( Cipher . ENCRYPT_MODE , key ) . doFinal ( plainFile ) ;
} catch ( IllegalBlockSizeException | BadPaddingException e ) {
log . error ( " 文件加密失败： " + e ) ;
}
return cipherText ;
}
/**
* 下载文件解密(传入文件流，输出流对象后直接处理即解密文件流后输出文件)
*
* @param inputStream
* @param outputStream
* @return
*/
public static boolean decryptFile ( InputStream inputStream , OutputStream outputStream , String key ) {
try {
CipherOutputStream cipherOutputStream = new CipherOutputStream (
outputStream , getCipher ( Cipher . DECRYPT_MODE , key ) ) ;
byte [ ] buffer = new byte [ 1024 ] ;
int r ;
while ( ( r = inputStream . read ( buffer ) ) > = 0 ) {
cipherOutputStream . write ( buffer , 0 , r ) ;
}
cipherOutputStream . close ( ) ;
} catch ( Exception e ) {
e . printStackTrace ( ) ;
}
return true ;
}
/**
* 下载文件解密(传入字节，解密后返回字节)
*
* @param cipherFile
* @return
* @throws Exception
*/
public static byte [ ] decryptFile ( byte [ ] cipherFile , String key ) {
byte [ ] cipherText = new byte [ 0 ] ;
try {
cipherText = getCipher ( Cipher . DECRYPT_MODE , key ) . doFinal ( cipherFile ) ;
} catch ( IllegalBlockSizeException | BadPaddingException e ) {
log . error ( " 文件解密失败： " + e ) ;
}
return cipherText ;
}
}
