package org.carelife.creader.util;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.security.Key;
import java.security.SecureRandom;
import javax.crypto.Cipher;
import javax.crypto.CipherInputStream;
import javax.crypto.CipherOutputStream;
import javax.crypto.KeyGenerator;
import Decoder.BASE64Decoder;
import Decoder.BASE64Encoder;
public class DesUtil {
Key key ;
public DesUtil() {
}
public DesUtil(String str) {
setKey(str); // �����ܳ�
}
public Key getKey() {
return key ;
}
public void setKey(Key key) {
this.key = key;
}
/**
* ���ݲ������� KEY
*/
public void setKey(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);
}
}
/**
* ���� String �������� ,String �������
*/
public String encryptStr(String strMing) {
byte [] byteMi = null ;
byte [] byteMing = null ;
String strMi = "" ;
BASE64Encoder base64en = new BASE64Encoder();
try {
byteMing = strMing.getBytes( "UTF8" );
byteMi = this .encryptByte(byteMing);
strMi = base64en.encode(byteMi);
} catch (Exception e) {
throw new RuntimeException(
"Error initializing SqlMap class. Cause: " + e);
} finally {
base64en = null ;
byteMing = null ;
byteMi = null ;
}
return strMi;
}
/**
* ���� �� String �������� ,String �������
*
* @param strMi
* @return
*/
public String decryptStr(String strMi) {
BASE64Decoder base64De = new BASE64Decoder();
byte [] byteMing = null ;
byte [] byteMi = null ;
String strMing = "" ;
try {
byteMi = base64De.decodeBuffer(strMi);
byteMing = this .decryptByte(byteMi);
strMing = new String(byteMing, "UTF8" );
} catch (Exception e) {
throw new RuntimeException(
"Error initializing SqlMap class. Cause: " + e);
} finally {
base64De = null ;
byteMing = null ;
byteMi = null ;
}
return strMing;
}
/**
* ������ byte[] �������� ,byte[] �������
*
* @param byteS
* @return
*/
private byte [] encryptByte( 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) {
throw new RuntimeException(
"Error initializing SqlMap class. Cause: " + e);
} finally {
cipher = null ;
}
return byteFina;
}
/**
* ������ byte[] �������� , �� byte[] �������
*
* @param byteD
* @return
*/
private byte [] decryptByte( 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) {
throw new RuntimeException(
"Error initializing SqlMap class. Cause: " + e);
} finally {
cipher = null ;
}
return byteFina;
}
/**
* �ļ� file ���м��ܲ�����Ŀ���ļ� destFile ��
*
* @param file
* Ҫ���ܵ��ļ� �� c:/test/srcFile.txt
* @param destFile
* ���ܺ��ŵ��ļ��� �� c:/ ���ܺ��ļ� .txt
*/
public void encryptFile(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 encryptFile(InputStream in, OutputStream out) throws Exception {
Cipher cipher = Cipher.getInstance ( "DES" );
// cipher.init(Cipher.ENCRYPT_MODE, getKey());
cipher.init(Cipher. ENCRYPT_MODE , key );
CipherInputStream cis = new CipherInputStream(in, cipher);
byte [] buffer = new byte [1024];
int r;
while ((r = cis.read(buffer)) > 0) {
out.write(buffer, 0, r);
}
cis.close();
in.close();
out.close();
}
/**
* �ļ����� DES �㷨�����ļ�
*
* @param file
* �Ѽ��ܵ��ļ� �� c:/ ���ܺ��ļ� .txt *
* @param destFile
* ���ܺ��ŵ��ļ��� �� c:/ test/ ���ܺ��ļ� .txt
*/
public void decryptFile(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);
}
try{
cos.close();
}catch(Exception e){
cos = null;
e.printStackTrace();
}
out.close();
is.close();
}
public static void testDES() throws Exception {
DesUtil des = new DesUtil( "1234567" );
//DES �����ļ�
// des.encryptFile(FileUtil.new_dir+"test.txt", FileUtil.new_dir+"test_des.txt");
InputStream is = new FileInputStream(FileUtil.new_dir+"test.txt");
OutputStream out = new FileOutputStream(FileUtil.new_dir+"test_des.txt");
des.encryptFile(is, out);
//DES �����ļ�
des.decryptFile(FileUtil.new_dir+"test_des.txt", FileUtil.new_dir+"test_afterdes.txt");
String str1 = " Ҫ���ܵ��ַ��� test!@#$%^&*()_+|\\[]{};:,.<>����������;:()&*&^*&%$%#%@@!�q(�s3�t)�r" ;
// DES �����ַ���
String str2 = des.encryptStr(str1);
// DES �����ַ���
String deStr = des.decryptStr(str2);
System. out .println( " ����ǰ�� " + str1);
System. out .println( " ���ܺ� " + str2);
System. out .println( " ���ܺ� " + deStr);
}
}