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package xxx.common.util;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.spec.SecretKeySpec;
import java.io.UnsupportedEncodingException;
import java.security.InvalidAlgorithmParameterException;
import java.security.InvalidKeyException;
import java.security.Key;
import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;
import java.util.Base64;
/**
* Created by windwant on 2016/12/13.
*/
public class EncryptUtil {
private static final Logger logger = LoggerFactory.getLogger(EncryptUtil.class);
private static final String DEFAULT_CHARSET = "UTF-8";
private static final String EMPTY_STR = "";
private static final int AES_KEY_SIZE = 16;//256/192/128~32/24/16
public static void main(String[] args) {
String tempkey = "!@#$%^&*()_+";
String ming = "at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_77]";
long begin = System.currentTimeMillis();
for (int i = 0; i < 100000; i++) {
String en = tripleDesEncrypt(ming, tempkey);
String den = tripleDesDecrypt(en, tempkey);
}
long end = System.currentTimeMillis();
System.out.println("TripleDES: " + (end - begin));
System.out.println("TripleDES: " + (end - begin)/100000.0);
begin = System.currentTimeMillis();
for (int i = 0; i < 100000; i++) {
String en = desEncrypt(ming, tempkey);
String den = desDecrypt(en, tempkey);
}
end = System.currentTimeMillis();
System.out.println("DES: " + (end - begin));
System.out.println("DES: " + (end - begin)/100000.0);
begin = System.currentTimeMillis();
for (int i = 0; i < 100000; i++) {
String en = aesEncrypt(ming, tempkey);
String den = aesDecrypt(en, tempkey);
}
end = System.currentTimeMillis();
System.out.println("AES: " + (end - begin));
System.out.println("AES: " + (end - begin)/100000.0);
/*
100000次
key: !@#$%^&*()_+
src: at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_77]
TripleDES: 3831
TripleDES: 0.03831
DES: 845
DES: 0.00845
AES: 888
AES: 0.00888
*/
}
private static final String ENCRYPT = "AES";
private static final String CIPHER = "AES/CBC/PKCS5Padding";
/**
* AES加密
* @param key 加密密鑰
* @param src 加密內容
* @return 前往BASE64密文
*/
public static final String aesEncrypt(String src, String key) {
if(key == null || src == null){
return EMPTY_STR;
}
try {
byte[] bs = getAESResult(key, src.getBytes(DEFAULT_CHARSET), Cipher.ENCRYPT_MODE);
if (bs != null) {
return Base64.getEncoder().encodeToString(bs);
}
} catch (Exception e) {
logger.error(e.getMessage());
}
return src;
}
/**
* AES解密
* @param key 解密密鑰
* @param src 解密內容
* @return 明文
*/
public static final String aesDecrypt(String src, String key) {
if(key == null || src == null){
return EMPTY_STR;
}
try {
byte[] bs = getAESResult(key, Base64.getDecoder().decode(src.getBytes(DEFAULT_CHARSET)), Cipher.DECRYPT_MODE);
if (bs != null) {
return new String(bs, DEFAULT_CHARSET);
}
} catch (Exception e) {
e.printStackTrace();
logger.error(e.getMessage());
}
return src;
}
/**
* AES加解密後果
* @param key 密鑰
* @param textBytes 明文 密文 字節數組
* @param encryptMode 加密 解密
* @return
*/
private static byte[] getAESResult(String key, byte[] textBytes, final int encryptMode)
throws NoSuchPaddingException, NoSuchAlgorithmException, InvalidKeyException, BadPaddingException,
IllegalBlockSizeException, InvalidAlgorithmParameterException, UnsupportedEncodingException {
Key newKey = new SecretKeySpec(buildCLenKey(key, AES_KEY_SIZE), ENCRYPT);
Cipher cipher = Cipher.getInstance(ENCRYPT);
cipher.init(encryptMode, newKey, new SecureRandom());
return cipher.doFinal(textBytes);
}
//定義加密算法，有DES、DESede(3DES)
private static final String ALGORITHM = "DESede";
// 算法稱號/加密形式/填充方式
private static final String CIPHER_ALGORITHM_ECB = "DESede/ECB/PKCS5Padding";
/**
* TripleDES加密辦法
* @param src
* @param key
* @return BASE64
*/
public static final String tripleDesEncrypt(String src, String key) {
if(key == null || src == null){
return EMPTY_STR;
}
try {
byte[] des = getTripleDESResult(key, src.getBytes(), Cipher.ENCRYPT_MODE);
if(des != null) {
return Base64.getEncoder().encodeToString(des);
}
} catch (Exception e) {
logger.error(e.getMessage());
}
return src;
}
/**
* TripleDES解密函數
* @param src 密文的字節數組
* @param key 密鑰
* @return String 明文
*/
public static final String tripleDesDecrypt(String src, String key) {
if(key == null || src == null){
return EMPTY_STR;
}
try {
byte[] srcb = Base64.getDecoder().decode(src);
byte[] des = getTripleDESResult(key, srcb, Cipher.DECRYPT_MODE);
return new String(des, DEFAULT_CHARSET);
} catch (Exception e) {
logger.error(e.getMessage());
}
return src;
}
/**
* TripleDES加解密後果
* @param key 密鑰
* @param textBytes 明文 密文 字節數組
* @param encryptMode 加密 解密
* @return
*/
private static byte[] getTripleDESResult(String key, byte[] textBytes, final int encryptMode)
throws NoSuchPaddingException, NoSuchAlgorithmException, InvalidKeyException, BadPaddingException,
IllegalBlockSizeException, InvalidAlgorithmParameterException, UnsupportedEncodingException {
Key newKey = new SecretKeySpec(buildCLenKey(key, 24), ALGORITHM);
Cipher cipher = Cipher.getInstance(CIPHER_ALGORITHM_ECB);
cipher.init(encryptMode, newKey, new SecureRandom());
return cipher.doFinal(textBytes);
}
/**
* 依據字符串生成密鑰字節數組
* @param keyStr 密鑰字符串
* @param lgn 密鑰長度
* @return 長度密鑰字節數組
* @throws UnsupportedEncodingException
*/
private static byte[] buildCLenKey(String keyStr, int lgn) throws UnsupportedEncodingException {
byte[] key = new byte[lgn]; //聲明一個24位的字節數組，默許外面都是0
byte[] temp = keyStr.getBytes("UTF-8"); //將字符串轉成字節數組
///執行數組拷貝
if (key.length > temp.length) {
//假如temp不夠24位，則拷貝temp數組整個長度的內容到key數組中
System.arraycopy(temp, 0, key, 0, temp.length);
} else {
//假如temp大於24位，則拷貝temp數組24個長度的內容到key數組中
System.arraycopy(temp, 0, key, 0, key.length);
}
return key;
}
private static final String DES_ALGORITHM = "DES";
public static final String DES_CIPHER_ALGORITHM = "DES";
/**
* DES 加密辦法
* @param src
* @param key
* @return BASE64
*/
public static final String desEncrypt(String src, String key) {
if(key == null || src == null){
return EMPTY_STR;
}
try {
byte[] des = getDESResult(key, src.getBytes(), Cipher.ENCRYPT_MODE);
if(des != null) {
return Base64.getEncoder().encodeToString(des);
}
} catch (Exception e) {
logger.error(e.getMessage());
}
return src;
}
/**
* DES解密函數
* @param src 密文的字節數組
* @param key 密鑰
* @return String 明文
*/
public static final String desDecrypt(String src, String key) {
if(key == null || src == null){
return EMPTY_STR;
}
try {
byte[] srcb = Base64.getDecoder().decode(src);
byte[] des = getDESResult(key, srcb, Cipher.DECRYPT_MODE);
return new String(des, DEFAULT_CHARSET);
} catch (Exception e) {
logger.error(e.getMessage());
}
return src;
}
private static byte[] getDESResult(String key, byte[] textBytes, final int encryptMode)
throws NoSuchPaddingException, NoSuchAlgorithmException, InvalidKeyException, BadPaddingException,
IllegalBlockSizeException, InvalidAlgorithmParameterException, UnsupportedEncodingException {
Key newKey = new SecretKeySpec(buildCLenKey(key, 8), DES_ALGORITHM);
Cipher cipher = Cipher.getInstance(DES_CIPHER_ALGORITHM);
cipher.init(encryptMode, newKey, new SecureRandom());
return cipher.doFinal(textBytes);
}
}
