我的代码是，我已经加密了，生成的文件发给别人解不开，为什么呢？发现每次的key都是不一样的，怎么让我们两个的key保持一致？
我的代码：
——————————————————————
public class Locker {
Key key;
public Locker(String str) {
getKey(str);//生成密匙
}
/**
* 根据参数生成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);
}
}
/**
* 文件file进行加密并保存目标文件destFile中
*
* @param file 要加密的文件 如mnt/sdcard/PateokeyNormal.txt
* @param destFile 加密后存放的文件名 如mnt/sdcard/Pateokey.txt
*/
public void encrypt(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);
}
System.out.println("KEY加密="+key);
cis.close();
is.close();
out.close();
}
}
别人的代码：
——————————————————————
public class Locker {
Key key;
public Locker(String str) {
getKey(str);//生成密匙
}
/**
* 根据参数生成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);
}
}
/**
* 文件采用DES算法解密文件
*
* @param file 已加密的文件 如auth/Pateokey.txt
*
*/
public String decrypt(String file) throws Exception {
System.out.println("KEY解密="+key);
Cipher cipher = Cipher.getInstance("DES");
cipher.init(Cipher.DECRYPT_MODE, this.key);
InputStream is = new FileInputStream(file);
String PateoMessage = "";
OutputStream out =System.out;
// start
ByteArrayOutputStream baos = new ByteArrayOutputStream();
CipherOutputStream cos = new CipherOutputStream(baos, cipher);
// end
// CipherOutputStream cos = new CipherOutputStream(out, cipher);
byte[] buffer = new byte[1024];
int r;
while ((r = is.read(buffer)) >= 0) {
System.out.println("正在解密");
cos.write(buffer, 0, r);
}
cos.close();
//out.close();
is.close();
PateoMessage=baos.toString();
baos.close();
System.out.println("正在解密PateoMessage="+PateoMessage);
return PateoMessage;
}
}