对文件压缩加密/解密解压缩的例子,DES/RSA [转]
RSA压缩加密/解压缩解密
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.security.Key;
import java.security.KeyPair;
import java.security.KeyPairGenerator;
import java.security.PrivateKey;
import java.security.PublicKey;
import java.security.SecureRandom;
import java.util.Properties;
import java.util.UUID;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;
import java.util.zip.ZipOutputStream;
import javax.crypto.Cipher;
/**
* 对文件压缩加密/解密解压缩 对象类
*
*/
public class ZipEncrypt {
private static PrivateKey privateKey;
private static PublicKey publicKey;
private static void directoryZip(ZipOutputStream out, File f, String base)
throws Exception {
// 如果传入的是目录
if (f.isDirectory()) {
File[] fl = f.listFiles();
// 创建压缩的子目录
out.putNextEntry(new ZipEntry(base + "/"));
if (base.length() == 0) {
base = "";
} else {
base = base + "/";
}
for (int i = 0; i < fl.length; i++) {
directoryZip(out, fl[i], base + fl[i].getName());
}
} else {
// 把压缩文件加入rar中
out.putNextEntry(new ZipEntry(base));
FileInputStream in = new FileInputStream(f);
byte[] bb = new byte[2048];
int aa = 0;
while ((aa = in.read(bb)) != -1) {
out.write(bb, 0, aa);
}
in.close();
}
}
/**
* 压缩文件
* @param zos
* @param file
* @throws Exception
*/
private static void fileZip(ZipOutputStream zos, File file)
throws Exception {
if (file.isFile()) {
zos.putNextEntry(new ZipEntry(file.getName()));
FileInputStream fis = new FileInputStream(file);
byte[] bb = new byte[2048];
int aa = 0;
while ((aa = fis.read(bb)) != -1) {
zos.write(bb, 0, aa);
}
fis.close();
System.out.println(file.getName());
} else {
directoryZip(zos, file, "");
}
}
/**
* 解压缩文件
*
* @param zis
* @param file
* @throws Exception
*/
private static void fileUnZip(ZipInputStream zis, File file)
throws Exception {
ZipEntry zip = zis.getNextEntry();
if (zip == null)
return;
String name = zip.getName();
File f = new File(file.getAbsolutePath() + "/" + name);
if (zip.isDirectory()) {
f.mkdirs();
fileUnZip(zis, file);
} else {
f.createNewFile();
FileOutputStream fos = new FileOutputStream(f);
byte b[] = new byte[2048];
int aa = 0;
while ((aa = zis.read(b)) != -1) {
fos.write(b, 0, aa);
}
fos.close();
fileUnZip(zis, file);
}
}
/**
* 对directory目录下的文件压缩，保存为指定的文件zipFile
*
* @param directory
* @param zipFile
*/
private static void zip(String directory, String zipFile) {
try {
ZipOutputStream zos = new ZipOutputStream(new FileOutputStream(
zipFile));
fileZip(zos, new File(directory));
zos.close();
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* 解压缩文件zipFile保存在directory目录下
*
* @param directory
* @param zipFile
*/
private static void unZip(String directory, String zipFile) {
try {
ZipInputStream zis = new ZipInputStream(
new FileInputStream(zipFile));
File f = new File(directory);
f.mkdirs();
fileUnZip(zis, f);
zis.close();
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* 根据key的路径文件获得持久化成文件的key
* <P>
* 例子: RsaEncrypt.getKey("c:/systemkey/private.key");
*
* @param keyPath
* @return
*/
public static Key getKey(String keyPath) throws Exception {
Key key = null;
FileInputStream fis = new FileInputStream(keyPath);
ObjectInputStream ofs = new ObjectInputStream(fis);
key = (Key) ofs.readObject();
return key;
}
/**
* 把文件srcFile加密后存储为destFile
*
* @param srcFile
* @param destFile
*/
private static void encrypt(String srcFile, String destFile, Key privateKey)
throws Exception {
Cipher cipher = Cipher.getInstance("RSA");
cipher.init(Cipher.ENCRYPT_MODE, privateKey);
FileInputStream fis = new FileInputStream(srcFile);
FileOutputStream fos = new FileOutputStream(destFile);
byte[] b = new byte[53];
while (fis.read(b) != -1) {
fos.write(cipher.doFinal(b));
}
fos.close();
fis.close();
}
/**
* 把文件srcFile解密后存储为destFile
*
* @param srcFile
* @param destFile
* @param privateKey
* @throws Exception
*/
private static void decrypt(String srcFile, String destFile, Key privateKey)
throws Exception {
Cipher cipher = Cipher.getInstance("RSA");
cipher.init(Cipher.DECRYPT_MODE, privateKey);
FileInputStream fis = new FileInputStream(srcFile);
FileOutputStream fos = new FileOutputStream(destFile);
byte[] b = new byte[64];
while (fis.read(b) != -1) {
fos.write(cipher.doFinal(b));
}
fos.close();
fis.close();
}
/**
* 对目录srcFile下的所有文件目录进行先压缩后操作,然后保存为destfile
*
* @param srcFile
* 要操作的目录 如c:/test/test
* @param destfile
* 压缩加密后存放的文件名 如c:/加密压缩文件.zip
* @param keyfile
* 公钥存放地点
*/
public static void encryptZip(String srcFile, String destfile, String keyfile) throws Exception {
SecureRandom sr = new SecureRandom();
KeyPairGenerator kg = KeyPairGenerator.getInstance("RSA");
kg.initialize(512, sr);
//产生新密钥对
KeyPair kp = kg.generateKeyPair();
//获得私匙
ZipEncrypt.privateKey = kp.getPrivate();
//获得公钥
ZipEncrypt.publicKey = kp.getPublic();
File f = new File(keyfile);
f.createNewFile();
FileOutputStream fos = new FileOutputStream(f);
ObjectOutputStream dos = new ObjectOutputStream(fos);
dos.writeObject(ZipEncrypt.publicKey);
File temp = new File(UUID.randomUUID().toString() + ".zip");
temp.deleteOnExit();
// 先压缩文件
zip(srcFile, temp.getAbsolutePath());
// 对文件加密
encrypt(temp.getAbsolutePath(), destfile, privateKey);
temp.delete();
}
/**
* 对文件srcfile进行先解密后解压缩,然后解压缩到目录destfile下
*
* @param srcfile
* 要解密和解压缩的文件名 如c:/目标.zip
* @param destfile
* 解压缩后的目录 如c:/abc
* @param publicKey
* 公钥
*/
public static void decryptUnzip(String srcfile, String destfile,
Key publicKey) throws Exception {
// 先对文件解密
File temp = new File(UUID.randomUUID().toString() + ".zip");
temp.deleteOnExit();
decrypt(srcfile, temp.getAbsolutePath(), publicKey);
// 解压缩
unZip(destfile, temp.getAbsolutePath());
temp.delete();
}
public static void main(String args[]) throws Exception {
File f = new File(".");
Properties prop = new Properties(); ;
FileInputStream fis = new FileInputStream("./conf.properties");
prop.load(fis);
//要压缩的目录
String srcPath = prop.getProperty("SRC_PATH");
//压缩后的存放文件
String destZip = prop.getProperty("DEST_FILE");
//压缩加密后的publickey
String keyfile = prop.getProperty("KEY_FILE");
ZipEncrypt.encryptZip(srcPath, destZip,keyfile);
/*解密
ZipEncrypt.decryptUnzip("e:/comXXX/comxxxx.zip", "d:/comxxx", ZipEncrypt
.getKey("e:/comXXX/public.key"));
*/
}
}
AES压缩加密/解压缩解密，网上一般用base64来对byte[]编码,其实不需要，指定AES/CBC/PKCS5Padding
来指定加密解密时候位数不对的情况下，用pkcs5padding来附加位数，不过这个时候读解密的文件的时候，要多读16位的验证位就不会报异常
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.ObjectInputStream;
import java.security.Key;
import java.security.SecureRandom;
import java.util.UUID;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;
import java.util.zip.ZipOutputStream;
import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import javax.crypto.SecretKey;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
/**
* 对文件加密/解密和压缩/解压缩对象类
* @author 赵成明
*/
public class ZipEncrypt {
private void directoryZip(ZipOutputStream out, File f, String base)
throws Exception {
// 如果传入的是目录
if (f.isDirectory()) {
File[] fl = f.listFiles();
// 创建压缩的子目录
out.putNextEntry(new ZipEntry(base + "/"));
if (base.length() == 0) {
base = "";
} else {
base = base + "/";
}
for (int i = 0; i < fl.length; i++) {
directoryZip(out, fl[i], base + fl[i].getName());
}
} else {
// 把压缩文件加入rar中
out.putNextEntry(new ZipEntry(base));
FileInputStream in = new FileInputStream(f);
byte[] bb = new byte[2048];
int aa = 0;
while ((aa = in.read(bb)) != -1) {
out.write(bb, 0, aa);
}
in.close();
}
}
/**
* 压缩文件
* @param zos
* @param file
* @throws Exception
*/
private void fileZip(ZipOutputStream zos, File file)
throws Exception {
if (file.isFile()) {
zos.putNextEntry(new ZipEntry(file.getName()));
FileInputStream fis = new FileInputStream(file);
byte[] bb = new byte[2048];
int aa = 0;
while ((aa = fis.read(bb)) != -1) {
zos.write(bb, 0, aa);
}
fis.close();
System.out.println(file.getName());
} else {
directoryZip(zos, file, "");
}
}
/**
* 解压缩文件
*
* @param zis
* @param file
* @throws Exception
*/
private void fileUnZip(ZipInputStream zis, File file)
throws Exception {
ZipEntry zip = zis.getNextEntry();
if (zip == null)
return;
String name = zip.getName();
File f = new File(file.getAbsolutePath() + "/" + name);
if (zip.isDirectory()) {
f.mkdirs();
fileUnZip(zis, file);
} else {
f.createNewFile();
FileOutputStream fos = new FileOutputStream(f);
byte b[] = new byte[2048];
int aa = 0;
while ((aa = zis.read(b)) != -1) {
fos.write(b, 0, aa);
}
fos.close();
fileUnZip(zis, file);
}
}
/**
* 对directory目录下的文件压缩，保存为指定的文件zipFile
*
* @param directory
* @param zipFile
*/
private void zip(String directory, String zipFile) {
try {
ZipOutputStream zos = new ZipOutputStream(new FileOutputStream(
zipFile));
fileZip(zos, new File(directory));
zos.close();
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* 解压缩文件zipFile保存在directory目录下
*
* @param directory
* @param zipFile
*/
private void unZip(String directory, String zipFile) {
try {
ZipInputStream zis = new ZipInputStream(new FileInputStream(zipFile));
File f = new File(directory);
f.mkdirs();
fileUnZip(zis, f);
zis.close();
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* 根据key的路径文件获得持久化成文件的key
* <P>
* 例子: RsaEncrypt.getKey("c:/systemkey/private.key");
*
* @param keyPath
* @return
*/
private Key getKey(String keyPath) throws Exception {
FileInputStream fis = new FileInputStream(keyPath);
byte[] b = new byte[16];
fis.read(b);
SecretKeySpec dks = new SecretKeySpec(b,"AES");
fis.close();
return dks;
}
/**
* 把文件srcFile加密后存储为destFile
*
* @param srcFile
* @param destFile
*/
private void encrypt(String srcFile, String destFile, Key privateKey)
throws Exception {
SecureRandom sr = new SecureRandom();
Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
IvParameterSpec spec=new IvParameterSpec(privateKey.getEncoded());
cipher.init(Cipher.ENCRYPT_MODE, privateKey,spec,sr);
FileInputStream fis = new FileInputStream(srcFile);
FileOutputStream fos = new FileOutputStream(destFile);
byte[] b = new byte[2048];
while (fis.read(b) != -1) {
fos.write(cipher.doFinal(b));
}
fos.close();
fis.close();
}
/**
* 把文件srcFile解密后存储为destFile
*
* @param srcFile
* @param destFile
* @param privateKey
* @throws Exception
*/
private void decrypt(String srcFile, String destFile, Key privateKey)
throws Exception {
SecureRandom sr = new SecureRandom();
Cipher ciphers = Cipher.getInstance("AES/CBC/PKCS5Padding");
IvParameterSpec spec=new IvParameterSpec(privateKey.getEncoded());
ciphers.init(Cipher.DECRYPT_MODE,privateKey,spec,sr);
FileInputStream fis = new FileInputStream(srcFile);
FileOutputStream fos = new FileOutputStream(destFile);
byte[] b = new byte[2064];
while (fis.read(b) != -1) {
fos.write(ciphers.doFinal(b));
}
fos.close();
fis.close();
}
/**
* 对目录srcFile下的所有文件目录进行先压缩后操作,然后保存为destfile
*
* @param srcFile
* 要操作的目录 如c:/test/test
* @param destfile
* 压缩加密后存放的文件名 如c:/加密压缩文件.zip
* @param keyfile
* 公钥存放地点
*/
public void encryptZip(String srcFile, String destfile, String keyfile) throws Exception {
SecureRandom sr = new SecureRandom();
KeyGenerator kg = KeyGenerator.getInstance("AES");
kg.init(128,sr);
SecretKey key = kg.generateKey();
File f = new File(keyfile);
if (!f.getParentFile().exists())
f.getParentFile().mkdirs();
f.createNewFile();
FileOutputStream fos = new FileOutputStream(f);
fos.write(key.getEncoded());
File temp = new File(UUID.randomUUID().toString() + ".zip");
temp.deleteOnExit();
// 先压缩文件
zip(srcFile, temp.getAbsolutePath());
// 对文件加密
encrypt(temp.getAbsolutePath(), destfile, key);
temp.delete();
}
/**
* 对文件srcfile进行先解密后解压缩,然后解压缩到目录destfile下
*
* @param srcfile
* 要解密和解压缩的文件名 如c:/目标.zip
* @param destfile
* 解压缩后的目录 如c:/abc
* @param publicKey
* 公钥
*/
public void decryptUnzip(String srcfile, String destfile,
String keyfile) throws Exception {
// 先对文件解密
File temp = new File(UUID.randomUUID().toString() + ".zip");
temp.deleteOnExit();
decrypt(srcfile, temp.getAbsolutePath(), this.getKey(keyfile));
// 解压缩
unZip(destfile, temp.getAbsolutePath());
temp.delete();
}
public static void main(String args[]) throws Exception {
long a = System.currentTimeMillis();
new ZipEncrypt().encryptZip("e:/com", "e:/comXXX/page.zip","e:/comXXX/public.key");
System.out.println(System.currentTimeMillis()-a);
a = System.currentTimeMillis();
new ZipEncrypt().decryptUnzip("e:/comXXX/page.zip", "e:/comxxx", "e:/comXXX/public.key");
System.out.println(System.currentTimeMillis()-a);
}
}
</script>
出自：http://www.blogjava.net/zhaochengming/archive/2007/09/03/142396.html
