哪位大哥有用java做的数字签名源代码啊？

OK
这是一个我在屈城氏项目中创造的基于RSA加密会话密钥的源码，
先造出两把KEY，PUBKEY和PRIVKEY，然后PRIVKEY加密
用IRVKEY加密会话密钥，再用会话密钥加密信息
信息的组成部会如下会话密钥长度(int)+会话密钥+iv(16位固定)+加密的信息解密时先把PRIVKEY解密（基于口令，口令是"isdnymk"）然后拿privkey解密会话密钥，再解密信息，
package fileencryptorrsa;import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.security.*;
import java.security.spec.*;
import javax.crypto.*;
import javax.crypto.spec.*;
import java.io.*;
import java.util.*;
public class mainframe extends JFrame {
  JPanel contentPane;
  JButton ok_btn = new JButton();  //Construct the frame
  public mainframe() {
    enableEvents(AWTEvent.WINDOW_EVENT_MASK);
    try {
      jbInit();
    }
    catch(Exception e) {
      e.printStackTrace();
    }
  }  //Component initialization
  private void jbInit() throws Exception  {
    contentPane = (JPanel) this.getContentPane();
    ok_btn.setBounds(new Rectangle(187, 179, 119, 34));
    ok_btn.setText("ok");
    ok_btn.addActionListener(new mainframe_ok_btn_actionAdapter(this));
    contentPane.setMaximumSize(new Dimension(2147483647, 2147483647));
    contentPane.setLayout(null);
    this.setSize(new Dimension(400, 300));
    this.setTitle("Frame Title");
    contentPane.add(ok_btn, null);
  }
  private String privateKeyFileName="privkey.bin";
  private String password="isdnymk";
  private String publicKeyFileName="pubkey.bin";
  private int ITERATIONS=1000;
  private String fileName="a.txt";
  private String encryptFile="ea.txt";
  private String decryptFile="da.txt";
  //Overridden so we can exit when window is closed
  protected void processWindowEvent(WindowEvent e) {
    super.processWindowEvent(e);
    if (e.getID() == WindowEvent.WINDOW_CLOSING) {
      System.exit(0);
    }
  }  private void createKey(){
    try
    {
      KeyPairGenerator keyPairGenerator=KeyPairGenerator.getInstance("RSA");
      keyPairGenerator.initialize(1024);
      KeyPair keyPair=keyPairGenerator.genKeyPair();
      byte[] pubKeyBytes=keyPair.getPublic().getEncoded();
      FileOutputStream fos=new FileOutputStream(publicKeyFileName);
      fos.write(pubKeyBytes);
      fos.close();
      byte[] privateKeyBytes=keyPair.getPrivate().getEncoded();
      byte[] encryptedPrivateKeyBytes=passwordEncrypt(password.toCharArray(),privateKeyBytes);
      fos=new FileOutputStream(privateKeyFileName);
      fos.write(encryptedPrivateKeyBytes);
      fos.close();
    }catch(Exception ex){
      JOptionPane.showMessageDialog(null,"error:"+ex);
    }
  }
  private byte[] passwordEncrypt(char[] password,byte[] plaintext){
    try
    {
      byte[] salt=new byte[8];
      Random random=new Random();
      random.nextBytes(salt);
      PBEKeySpec keySpec=new PBEKeySpec(password);
      SecretKeyFactory keyFactory=SecretKeyFactory.getInstance("PBEWithSHAAndTwofish-CBC");
      SecretKey key=keyFactory.generateSecret(keySpec);
      PBEParameterSpec paramSpec=new PBEParameterSpec(salt,ITERATIONS);
      Cipher cipher=Cipher.getInstance("PBEWithSHAAndTwofish-CBC");
      cipher.init(Cipher.ENCRYPT_MODE,key,paramSpec);
      byte[] ciphertext=cipher.doFinal(plaintext);
      ByteArrayOutputStream baos=new ByteArrayOutputStream();
      baos.write(salt);
      baos.write(ciphertext);
      return baos.toByteArray();
    }catch(Exception ex){
      JOptionPane.showMessageDialog(null,"error:"+ex);
    }
    return null;
  }
  public byte[] passwordDecrypt(char[] password,byte[] ciphertext){
    try
    {
      byte[] salt=new byte[8];
      ByteArrayInputStream bais=new ByteArrayInputStream(ciphertext);
      bais.read(salt,0,8);
      byte[] remainingCiphertext=new byte[ciphertext.length-8];
      bais.read(remainingCiphertext,0,ciphertext.length-8);
      PBEKeySpec keySpec=new PBEKeySpec(password);
      SecretKeyFactory keyFactory=SecretKeyFactory.getInstance("PBEWithSHAAndTwofish-CBC");
      SecretKey key=keyFactory.generateSecret(keySpec);
      PBEParameterSpec paramSpec=new PBEParameterSpec(salt,ITERATIONS);
      Cipher cipher=Cipher.getInstance("PBEWithSHAAndTwofish-CBC");
      cipher.init(cipher.DECRYPT_MODE,key,paramSpec);
      return cipher.doFinal(remainingCiphertext);
    }catch(Exception ex){
      JOptionPane.showMessageDialog(null,"error:"+ex);
    }
    return null;
  }
public void encrypt(String fileInput){
    try
   {
     FileInputStream fis=new FileInputStream(publicKeyFileName);
     ByteArrayOutputStream baos=new ByteArrayOutputStream();
     int theByte=0;
     while((theByte=fis.read())!=-1)
     {
       baos.write(theByte);
     }
     fis.close();
     byte[] keyBytes=baos.toByteArray();
     baos.close();
     X509EncodedKeySpec keySpec=new X509EncodedKeySpec(keyBytes);
     KeyFactory keyFactory=KeyFactory.getInstance("RSA");
     PublicKey publicKey=keyFactory.generatePublic(keySpec);
     DataOutputStream output=new DataOutputStream(new FileOutputStream(encryptFile));
     Cipher rsaCipher=Cipher.getInstance("RSA/ECB/PKCS1Padding");
     rsaCipher.init(Cipher.ENCRYPT_MODE,publicKey);
     KeyGenerator rijndaelKeyGenerator=KeyGenerator.getInstance("Rijndael");
     rijndaelKeyGenerator.init(256);
     Key rijndaelKey=rijndaelKeyGenerator.generateKey();
     byte[] encodedKeyBytes=rsaCipher.doFinal(rijndaelKey.getEncoded());
     output.writeInt(encodedKeyBytes.length);
     output.write(encodedKeyBytes);
     SecureRandom random=new SecureRandom();
     byte[] iv=new byte[16];
     random.nextBytes(iv);
     output.write(iv);
     IvParameterSpec spec=new IvParameterSpec(iv);
     Cipher symmetricCipher=Cipher.getInstance("Rijndael/CBC/PKCS5Padding");
     symmetricCipher.init(Cipher.ENCRYPT_MODE,rijndaelKey,spec);
     CipherOutputStream cos=new CipherOutputStream(output,symmetricCipher);
     FileInputStream input=new FileInputStream(fileName);
     theByte=0;
     while((theByte=input.read())!=-1){
       cos.write(theByte);
     }
     input.close();
     cos.close();
     return;
   }catch(Exception ex){
     JOptionPane.showMessageDialog(null,"error:"+ex);
   }
  }  private void decrypt(String fileInput){
    try
    {
      FileInputStream fis=new FileInputStream(privateKeyFileName);
      ByteArrayOutputStream baos=new ByteArrayOutputStream();
      int theByte=0;
      while((theByte=fis.read())!=-1)
      {
        baos.write(theByte);
      }
      fis.close();
      byte[] keyBytes=baos.toByteArray();
      baos.close();
      keyBytes=passwordDecrypt(password.toCharArray(),keyBytes);
      PKCS8EncodedKeySpec keySpec=new PKCS8EncodedKeySpec(keyBytes);
      KeyFactory keyFactory=KeyFactory.getInstance("RSA");
      PrivateKey privateKey=keyFactory.generatePrivate(keySpec);
      Cipher rsaCipher=Cipher.getInstance("RSA/ECB/PKCS1Padding");
      DataInputStream dis=new DataInputStream(new FileInputStream(fileInput));
      byte[] encryptedKeyBytes=new byte[dis.readInt()];
      dis.readFully(encryptedKeyBytes);
      rsaCipher.init(Cipher.DECRYPT_MODE,privateKey);
      byte[] rijndaelKeyBytes=rsaCipher.doFinal(encryptedKeyBytes);
      SecretKey rijndaelKey=new SecretKeySpec(rijndaelKeyBytes,"Rijndael");
      byte[] iv=new byte[16];
      dis.read(iv);
      IvParameterSpec spec=new IvParameterSpec(iv);
      Cipher cipher=Cipher.getInstance("Rijndael/CBC/PKCS5Padding");
      cipher.init(Cipher.DECRYPT_MODE,rijndaelKey,spec);
      CipherInputStream cis=new CipherInputStream(dis,cipher);
      FileOutputStream fos=new FileOutputStream(decryptFile);
      theByte=0;
      while((theByte=cis.read())!=-1){
        fos.write(theByte);
      }
      cis.close();
      fos.close();
      return;
    }catch(Exception ex){
      JOptionPane.showMessageDialog(null,"error:"+ex);
    }
  }
  void ok_btn_actionPerformed(ActionEvent e) {
    try
    {
      this.createKey();
      this.encrypt("a.txt");
      this.decrypt("ea.txt");
    }catch(Exception ex){
      JOptionPane.showMessageDialog(null,"error:"+ex);
    }
  }
}class mainframe_ok_btn_actionAdapter implements java.awt.event.ActionListener {
  mainframe adaptee;  mainframe_ok_btn_actionAdapter(mainframe adaptee) {
    this.adaptee = adaptee;
  }
  public void actionPerformed(ActionEvent e) {
    adaptee.ok_btn_actionPerformed(e);
  }
}

调试易

哪位大哥有用java做的数字签名源代码啊？

解决方案 »