Java对文件压缩/加密/解密/解压缩的例子,DES/RSA
RSA压缩加密/解压缩解密
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
加密:encryptZip
通过路径找到Key:getKey
解密:decryptUnzip
转自【http://topic.csdn.net/u/20081215/09/6ad763bd-a158-488a-8e5e-b34cec2a0424.html及http://www.blogjava.net/zhaochengming/archive/2007/09/03/142396.html】
- 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"));
- */
- }
- }
- 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);
- }
- }
通过路径找到Key:getKey
解密:decryptUnzip
转自【http://topic.csdn.net/u/20081215/09/6ad763bd-a158-488a-8e5e-b34cec2a0424.html及http://www.blogjava.net/zhaochengming/archive/2007/09/03/142396.html】