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
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>

posted on 2007-09-03 17:35 helloworld2008 阅读(4635) 评论(2) 编辑收藏所属分类: java 、java - jca

# re: 解密解压缩的例子,DES/RSA 2008-04-28 08:39 xi

123 回复更多评论

# re: 对文件压缩加密/解密解压缩的例子,DES/RSA[未登录] 2008-12-21 20:47 what

好像不是zip格式的,而其key是一个文件
加密:encryptZip
通过路径找到Key:getKey
解密:decryptUnzip 回复更多评论

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