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package com.kaishengit.util.desfile;
import com.google.gson.Gson;
import javax.crypto.KeyGenerator;
import javax.crypto.CipherInputStream;
import javax.crypto.Cipher;
import javax.crypto.CipherOutputStream;
import java.security.SecureRandom;
import java.security.Key;
import java.io.*;
import java.security.*;
import java.util.ArrayList;
import java.util.List;
import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;
/**
*
* @author Y-T測試成功
*/
public class DesFile3 {
// private static final String k = "24234";
Key key;
public DesFile3() {
getKey("24234");//生成密匙
}
/**
* 根據參數生成KEY
*/
public void getKey(String strKey) {
try {
KeyGenerator _generator = KeyGenerator.getInstance("DES");
_generator.init(new SecureRandom(strKey.getBytes()));
this.key = _generator.generateKey();
_generator = null;
} catch (Exception e) {
throw new RuntimeException("Error initializing SqlMap class. Cause: " + e);
}
}
//加密以byte[]明文輸入,byte[]密文輸出
private byte[] getEncCode(byte[] byteS) {
byte[] byteFina = null;
Cipher cipher;
try {
cipher = Cipher.getInstance("DES");
cipher.init(Cipher.ENCRYPT_MODE, key);
byteFina = cipher.doFinal(byteS);
} catch (Exception e) {
e.printStackTrace();
} finally {
cipher = null;
}
return byteFina;
}
// 加密String明文輸入,String密文輸出
public String setEncString(String strMing) {
BASE64Encoder base64en = new BASE64Encoder();
String s = null;
try {
s = base64en.encode(getEncCode(strMing.getBytes("UTF8")));
} catch (Exception e) {
e.printStackTrace();
}
return s;
}
public String setEncString(String strMing, int count) {
BASE64Encoder base64en = new BASE64Encoder();
String s = strMing;
if (s != null) {
for (int i = 0; i < count; i++) {
try {
s = base64en.encode(getEncCode(s.getBytes("UTF8")));
} catch (Exception e) {
e.printStackTrace();
}
}
} else {
return s;
}
return s;
}
// 解密以byte[]密文輸入,以byte[]明文輸出
public byte[] getDesCode(byte[] byteD) {
Cipher cipher;
byte[] byteFina = null;
try {
cipher = Cipher.getInstance("DES");
cipher.init(Cipher.DECRYPT_MODE, key);
byteFina = cipher.doFinal(byteD);
} catch (Exception e) {
e.printStackTrace();
} finally {
cipher = null;
}
return byteFina;
}
// 解密:以String密文輸入,String明文輸出
public String setDesString(String strMi) {
BASE64Decoder base64De = new BASE64Decoder();
String s = null;
try {
s = new String(getDesCode(base64De.decodeBuffer(strMi)), "UTF8");
} catch (Exception e) {
e.printStackTrace();
}
return s;
}
public String setDesString(String strMi, int count) {
BASE64Decoder base64De = new BASE64Decoder();
String s = strMi;
if (s != null) {
for (int i = 0; i < count; i++) {
try {
s = new String(getDesCode(base64De.decodeBuffer(s)), "UTF8");
} catch (Exception e) {
e.printStackTrace();
}
}
} else {
return s;
}
return s;
}
/**
* 文件file進行加密并保存目標文件destFile中
*
* @param file 要加密的文件 如c:/test/srcFile.txt
* @param destFile 加密后存放的文件名 如c:/加密后文件.txt
*/
public void fileEncrypt(String file, String destFile) throws Exception {
Cipher cipher = Cipher.getInstance("DES");
// cipher.init(Cipher.ENCRYPT_MODE, getKey());
cipher.init(Cipher.ENCRYPT_MODE, this.key);
InputStream is = new FileInputStream(file);
OutputStream out = new FileOutputStream(destFile);
CipherInputStream cis = new CipherInputStream(is, cipher);
byte[] buffer = new byte[1024];
int r;
while ((r = cis.read(buffer)) > 0) {
out.write(buffer, 0, r);
}
cis.close();
is.close();
out.close();
}
public void fileEncrypt(String file, String destFile, int count) throws Exception {
if(file!=null&&!"".equals(file)&&destFile!=null&&!"".equals(destFile)){
if(count==1){
fileEncrypt( file, destFile);
}else {
String temp="";
String st=file;
for(int i=0;i<count;i++){
if(i!=(count-1)){
temp="src/jia"+System.currentTimeMillis();
fileEncrypt( st, temp);
File f = new File(st);
f.delete();
st=temp;
}else {
fileEncrypt( st, destFile);
File f = new File(st);
f.delete();
}
}
}
}
}
/**
* 文件采用DES算法解密文件
*
* @param file 已加密的文件 如c:/加密后文件.txt
* * @param destFile 解密后存放的文件名 如c:/ test/解密后文件.txt
*/
public void fileDecrypt(String file, String dest) throws Exception {
Cipher cipher = Cipher.getInstance("DES");
cipher.init(Cipher.DECRYPT_MODE, this.key);
InputStream is = new FileInputStream(file);
OutputStream out = new FileOutputStream(dest);
CipherOutputStream cos = new CipherOutputStream(out, cipher);
byte[] buffer = new byte[1024];
int r;
while ((r = is.read(buffer)) >= 0) {
cos.write(buffer, 0, r);
}
cos.close();
out.close();
is.close();
}
public void fileDecrypt(String file, String destFile, int count) throws Exception {
if(file!=null&&!"".equals(file)&&destFile!=null&&!"".equals(destFile)){
if(count==1){
fileDecrypt( file, destFile);
}else {
String temp="";
String st=file;
for(int i=0;i<count;i++){
if(i!=(count-1)){
temp="src/jie"+System.currentTimeMillis();
fileDecrypt( st, temp);
File f = new File(st);
f.delete();
st=temp;
}else {
fileDecrypt( st, destFile);
File f = new File(st);
f.delete();
}
}
}
}
}
public static void main(String[] args) throws Exception {
DesFile3 td = new DesFile3();
long begin = System.currentTimeMillis();
td.fileEncrypt("F:\\webservice\\webservice第一部分視頻\\02_wsimport的使用.avi", "F:\\webservice\\webservice第一部分視頻\\04",2); //加密
long jia = System.currentTimeMillis();
System.out.println((jia-begin)/1000);
long begin1 = System.currentTimeMillis();
// td.fileDecrypt("F:\\webservice\\webservice第一部分視頻\\04", "F:\\webservice\\webservice第一部分視頻\\04.a"); //解密
td.fileDecrypt("F:\\webservice\\webservice第一部分視頻\\04", "F:\\webservice\\webservice第一部分視頻\\04.avi",2); //解密
long jie = System.currentTimeMillis();
System.out.println((jie-begin1)/1000);
// List<User> list = new ArrayList<User>();
// User user = new User();
// user.setId(1);
// user.setAge(21);
// user.setName("楊軍威");
// User user1 = new User();
// user1.setId(2);
// user1.setAge(23);
// user1.setName("北京");
// list.add(user);
// list.add(user1);
// Gson gson = new Gson();
// String res = gson.toJson(list);
// System.out.println(res);
// System.out.println("加密==" + td.setEncString(res,2));
// // td.setEncString(res);
// System.out.println("解密==" + td.setDesString(td.setEncString(res,2),2));
}
}