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标题:
加密解密
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作者:
songyongpeng
时间:
2016-2-27 07:55
标题:
加密解密
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.Scanner;
public class Crazy {
private static Scanner sc = new Scanner(System.in);
private static String filePath = "";
private static int key = 0;
private static String bombom = ""; //,
private static byte[] keyArr;
private static String basicLock = "";
private static String basicKey = "91,80,111,119,101,114,32,66,121,32,76,105,72,117,97,110,93,";
public static void main(String[] args) throws NumberFormatException, IOException {
// TODO Auto-generated method stub
while (true) {
println("****************************************************");
println("*--------------------------------------------------*");
println("*--------接下来发生的事情有可能出乎你的意料--------*");
println("*---------------------准备开始---------------------*");
println("*--------------------------------------------------*");
println("****************************************************");
println("");
String tempSC = scanner("请输入要操作的路径：");
filePath = tempSC;
File file = getFile(filePath);
if (file.exists()) {
if (file.isDirectory()) {
boolean isEncrypt;
while (true) {
println("****************************************************");
println("*--------------------------------------------------*");
tempSC = scanner("*------------你要进行什么操作(加密/解密)-----------*");
if ("jiami".equals(tempSC) || "加密".equals(tempSC)) {
isEncrypt = true;
break;
} else if ("jiemi".equals(tempSC) || "解密".equals(tempSC)) {
isEncrypt = false;
break;
} else {
//println("*********************请重新输入*********************");
}
}
println("");
println("****************************************************");
println("*--------------------------------------------------*");
tempSC = scanner("*-----------------请输入KEY(密钥)------------------*");
bombom = "";
keyArr = tempSC.getBytes();
key = 0;
for (int i = 0; i < keyArr.length; i++) {
bombom += ((256 - Math.abs(keyArr[i])) ^ 1) + ",";
key += (256 - Math.abs(keyArr[i]));
}
key = Math.abs(key);
if (isEncrypt) {
encrypt(file);
} else {
decrypt(file);
}
} else {
println("你输入的是文件路径！");
}
} else {
println("路径不存在！");
}
println("----------------------------------------------------");
println("****************************************************");
println("");
}
}
public static boolean checkFile(BufferedInputStream bis,String checkType) throws IOException {
String sss = "";
String[] sArr = bombom.split(",");
basicLock = "";
int b;
for (int i = 0; i < basicKey.split(",").length; i++) {
if ((b = bis.read()) != -1) {
basicLock += (b + ",");
} else {
//break;
}
}
if ("encrypt".equals(checkType)) {
if (basicKey.equals(basicLock)) {
//基础密钥一致,说明是已经经过加密的，因此返回false跳过，不再加密处理
return false;
} else {
//基础密钥不一致
//进行加密
return true;
}
} else if ("decrypt".equals(checkType)) {
if (basicKey.equals(basicLock)) {
//基础密钥一致
int forNum = bis.read();
if (forNum == -1) {
return false; //跳出
} else {
for (int j = 0; j < forNum; j++) {
if ((b = bis.read()) != -1) {
sss += (b + ",");
} else {
break;
}
}
if (sss.equals(bombom)) {
return true;
} else {
return false;
}
}
} else {
//基础密钥不一致，说明文件没有经过加密，因此无需进行加密处理，直接返回false跳过
return false;
}
} else {
println("未知错误！");
return false;
}
}
public static void encrypt(File file) throws NumberFormatException, IOException {
File[] fileLists = getFileLists(file);
if (fileLists != null) {
for (File f : fileLists) {
if (f.isDirectory()) {
encrypt(f);
} else {
FileInputStream fis = new FileInputStream(f.getPath());
BufferedInputStream bis = new BufferedInputStream(fis);
FileOutputStream fos = new FileOutputStream(f.getPath() + ".lihuan");
BufferedOutputStream bos = new BufferedOutputStream(fos);
if (checkFile(bis, "encrypt")) {
bis.close();
int b;
String[] sArr = basicKey.split(",");
for (String s : sArr) {
bos.write(Integer.parseInt(s));
}
bos.write(keyArr.length);
sArr = bombom.split(",");
for (String s : sArr) {
bos.write(Integer.parseInt(s));
}
fis = new FileInputStream(f.getPath());
bis = new BufferedInputStream(fis);
while ((b = bis.read()) != -1) {
int tempb;
if ((tempb = bis.read()) != -1) {
b = b ^ tempb;
tempb = tempb ^ key;
bos.write(b);
bos.write(tempb);
} else {
b = b ^ key;
bos.write(b);
}
}
bos.close();
bis.close();
File fileCopy = new File(f.getPath() + ".lihuan");
String filePath = f.getPath();
System.out.println(f.getPath() + "[加密成功]");
f.delete();
File fileNew = new File(filePath);
fileCopy.renameTo(fileNew);
} else {
System.out.println(f.getPath() + "[未操作]");
bos.close();
bis.close();
File fileCopy = new File(f.getPath() + ".lihuan");
fileCopy.delete();
}
}
}
}
}
public static void decrypt(File file) throws NumberFormatException, IOException {
File[] fileLists = getFileLists(file);
if (fileLists != null) {
for (File f : fileLists) {
if (f.isDirectory()) {
decrypt(f);
} else {
FileInputStream fis = new FileInputStream(f.getPath());
BufferedInputStream bis = new BufferedInputStream(fis);
FileOutputStream fos = new FileOutputStream(f.getPath() + ".lihuan");
BufferedOutputStream bos = new BufferedOutputStream(fos);
if (checkFile(bis, "decrypt")) {
int b;
while ((b = bis.read()) != -1) {
int tempb;
if ((tempb = bis.read()) != -1) {
tempb = tempb ^ key;
b = b ^ tempb;
bos.write(b);
bos.write(tempb);
} else {
b = b ^ key;
bos.write(b);
}
}
bos.close();
bis.close();
File fileCopy = new File(f.getPath() + ".lihuan");
String filePath = f.getPath();
println(f.getPath() + "[解密成功]");
f.delete();
File fileNew = new File(filePath);
fileCopy.renameTo(fileNew);
} else {
println(f.getPath() + "[未操作]");
bos.close();
bis.close();
File fileCopy = new File(f.getPath() + ".lihuan");
fileCopy.delete();
}
}
}
}
}
public static File getFile(String filePath) {
File file = new File(filePath);
return file;
}
public static File[] getFileLists(File file) {
File[] fileLists = file.listFiles();
return fileLists;
}
public static String scanner(String message) {
println(message);
String tempStr = sc.nextLine();
if ("exit".equals(tempStr.toLowerCase()) || "tuichu".equals(tempStr.toLowerCase()) || "退出".equals(tempStr.toLowerCase())) {
System.out.println("程序正在退出......");
System.exit(0);
} else {
}
return tempStr;
}
public static void print(String str) {
System.out.print(str);
}
public static void println(String str) {
System.out.println(str);
print("");
}
}
作者:
huang_bing_hua
时间:
2016-2-27 08:19
好复杂，真牛……………………
作者:
lidebin
时间:
2016-2-27 08:24
这是基础班的东西吗
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