hldecrsaface.java

RSA加长分段解密算法

                        //密文段起始字符的位置（在EncText中）                        
                        int SegmentStartPos=staticRSA_Dec.preDecRsa();
                        preSegmentStartPos=SegmentStartPos;
                        setProgressBar();
                        progresserPos+=SegmentStartPos-preSegmentStartPos;
                        jMenuItem5.setEnabled(false);
                        jMenuItem5.setText("正在解密1");//changed
                        setTitle("HL-RSA解密器 - 正在解密“"+fileName+"”文件");
                        while(SegmentStartPos<staticRSA_Dec.getSectText().length()&&stop==false){
                            preSegmentStartPos=SegmentStartPos;
                            SegmentStartPos=staticRSA_Dec.DecRsa(SegmentStartPos);//调用解密方法
                            progresserPos+=SegmentStartPos-preSegmentStartPos;
                        }
                        staticRSA_Dec.froDecRsa();//善后处理
                    }
                   progresserPos=progresserLength;
                   setProgressBar();
                    if(stop==false){
                        JOptionPane.showMessageDialog(HLDecRSAFace.this,
                                "密文已成功解密！",
                                "恭喜",
                                JOptionPane.INFORMATION_MESSAGE);
                        jTextArea3.setText(staticRSA_Dec.getDecText());//输出解密后的明文;
                    } else{
                        JOptionPane.showMessageDialog(HLDecRSAFace.this,
                                "解密密文已取消！",
                                "提示！",
                                JOptionPane.INFORMATION_MESSAGE);
                        progresser.setValue(0);
                        jButton3.setText("解密密文");
                        jLabel1.setText("已解密："+(String.valueOf(0))+" %");
                    }
                    stop=false;
                    jMenuItem5.setEnabled(true);
                    jMenuItem5.setText("解密密文");
                    setTitle("HL-RSA解密器");
                } catch(Exception e){}
            } else {
                JOptionPane.showMessageDialog(HLDecRSAFace.this,
                        "你还没有读取密文！",
                        "Error",
                        JOptionPane.ERROR_MESSAGE);
            }
        } catch(Exception e){};
        jButton3.setText("解密密文");
    }
    private void srcFileLoader()throws Exception{//浏览文件，打开明文
        JFileChooser fileChooser=new JFileChooser(".");
        fileChooser.addChoosableFileFilter(new FileFilterImpl(new String[]{"dat"},"Security Files(*.dat)"));
        int r=fileChooser.showOpenDialog(HLDecRSAFace.this);
        File file=fileChooser.getSelectedFile();
        if (file.isFile() && file.canRead()) {
            if(readEncFile=true){
                fileName=file.getName();
                readEncFile=true;
            }
            rsaKeyAndEncFilePath=file.getPath();
        } else{JOptionPane.showMessageDialog(HLDecRSAFace.this,
                "打开文件失败: " + file,
                "Error",
                JOptionPane.ERROR_MESSAGE);
        }
    }
    private void save(){//保存明文操作
        JFileChooser chooser;
        chooser=new JFileChooser(".");
        int r=chooser.showSaveDialog(HLDecRSAFace.this);
        if(r==JFileChooser.APPROVE_OPTION){
            File file=chooser.getSelectedFile();
            if(file.getName().indexOf(".")!=-1)
                ;
            else file=new File(file.getPath()+".txt");
            String content=jTextArea3.getText();
            content=StringEdit.StringReplace(content,"\n","\r\n");
            try{
                BufferedWriter bw=new BufferedWriter(new OutputStreamWriter(new FileOutputStream(file)));
                bw.write(content);
                bw.close();
            } catch(IOException ioe) {
                ioe.printStackTrace();
            }
        }
    }
    
    public static void main(String args[]) {
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new HLDecRSAFace(new HLDecRSA()).setVisible(true);
            }
        });
    }
    
    // 变量声明 - 不进行修改//GEN-BEGIN:variables
    private javax.swing.ButtonGroup buttonGroup1;
    private javax.swing.JButton jButton1;
    private javax.swing.JButton jButton2;
    private javax.swing.JButton jButton3;
    private javax.swing.JButton jButton4;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JMenu jMenu1;
    private javax.swing.JMenu jMenu2;
    private javax.swing.JMenu jMenu3;
    private javax.swing.JMenu jMenu4;
    private javax.swing.JMenu jMenu5;
    private javax.swing.JMenu jMenu6;
    private javax.swing.JMenuBar jMenuBar1;
    private javax.swing.JMenuItem jMenuItem1;
    private javax.swing.JMenuItem jMenuItem2;
    private javax.swing.JMenuItem jMenuItem3;
    private javax.swing.JMenuItem jMenuItem4;
    private javax.swing.JMenuItem jMenuItem5;
    private javax.swing.JMenuItem jMenuItem6;
    private javax.swing.JMenuItem jMenuItem7;
    private javax.swing.JMenuItem jMenuItem8;
    private javax.swing.JPanel jPanel1;
    private javax.swing.JPanel jPanel2;
    private javax.swing.JPanel jPanel3;
    private javax.swing.JPanel jPanel4;
    private javax.swing.JPanel jPanel5;
    private javax.swing.JRadioButtonMenuItem jRadioButtonMenuItem1;
    private javax.swing.JRadioButtonMenuItem jRadioButtonMenuItem2;
    private javax.swing.JScrollPane jScrollPane1;
    private javax.swing.JScrollPane jScrollPane2;
    private javax.swing.JScrollPane jScrollPane3;
    private javax.swing.JTextArea jTextArea1;
    private javax.swing.JTextArea jTextArea2;
    private javax.swing.JTextArea jTextArea3;
    // 变量声明结束//GEN-END:variables
    private DataDialog dialog = null;
    private JProgressBar progresser;
    private Boolean readEnc,readKey,readEncFile;
    private Boolean lookJava,stop;
    private byte[] mt;
    private HLDecRSA staticRSA_Dec;
    private int progresserPos,progresserLength;
    private int midSegmentStartPos;
    private int keyLength;
    private String fileName;
    private String rsaKeyAndEncFilePath;
    private String str1 = "com.sun.java.swing.plaf.windows.WindowsLookAndFeel";
    private String str2 = "javax.swing.plaf.metal.MetalLookAndFeel";
}

class StringEdit//保存明文文件辅助类
{
    public static String StringReplace(String Source,String indexStr,String replaceWord) {
        int scanPoint=0;
        String backUp=Source;
        while(scanPoint!=-1&&scanPoint<backUp.length()) {
            scanPoint=backUp.indexOf(indexStr,scanPoint);
            if(scanPoint!=-1) {
                String frontStr=backUp.substring(0,scanPoint);
                String backStr=backUp.substring(scanPoint+indexStr.length(),backUp.length());
                backUp=frontStr+replaceWord+backStr;
                scanPoint++;
                scanPoint+=(replaceWord.length()-indexStr.length());
            }
        }
        return backUp;
    }
}

//打开文件类型过虑类
class FileFilterImpl extends javax.swing.filechooser.FileFilter{
    String[] exts;
    String description;
    public FileFilterImpl(String[] extensions,String description){
        exts=new String[extensions.length];
        for(int i=0;i<exts.length;i++)
            exts[i]=extensions[i];
        this.description=description;
    }
    public boolean accept(File f){
        String fileName=f.getName();
        for(int i=0;i<exts.length;i++){
            if(fileName.endsWith(exts[i]))
                return true;
        }
        return false;
    }
    public String getDescription(){
        return description;
    }
}

class ConnectInfo {
    public int keyLength;
    public ConnectInfo(int keyLen) {
        keyLength=keyLen; }
}
//产生密钥对话框类
class DataDialog extends JDialog implements ActionListener {
    private JTextField username, password;
    private JButton okButton, cancelButton;
    private boolean ok,yes;
    private javax.swing.JButton jButton1;
    private javax.swing.JButton jButton2;
    private javax.swing.JComboBox jComboBox1;
    private javax.swing.JLabel jLabel2;
    private Boolean lookJava;
    private String str1 = "com.sun.java.swing.plaf.windows.WindowsLookAndFeel";
    private String str2 = "javax.swing.plaf.metal.MetalLookAndFeel";
    public DataDialog(JFrame parent,Boolean lookJava) {
        super(parent, "产生密钥", true);
        JPanel contenPane=(JPanel)getContentPane();
        contenPane.setLayout(null);
        jLabel2=new JLabel("密钥长度:");
        jComboBox1 = new javax.swing.JComboBox();
        jComboBox1.setModel(new javax.swing.DefaultComboBoxModel(new String[] { "512", "640", "768", "1024", "1380", "1636", "1892", "2048" }));
        jButton1 = new javax.swing.JButton("确定");
        jButton2 = new javax.swing.JButton("取消");
        jButton1.addActionListener(this);
        jButton2.addActionListener(this);
        jLabel2.setBounds(new Rectangle(30, 20, 90, 30));
        jLabel2.setFont(new java.awt.Font("宋体", 0, 14));
        jComboBox1.setBounds(new Rectangle(120, 20, 70, 25));
        jButton1.setBounds(new Rectangle(30, 80, 60, 30));
        jButton2.setBounds(new Rectangle(130, 80, 60, 30));
        contenPane.add(jLabel2);
        contenPane.add(jComboBox1);
        contenPane.add(jButton1);
        contenPane.add(jButton2);
        setSize(220, 160);
        setResizable(false);
        java.awt.Dimension screenSize = java.awt.Toolkit.getDefaultToolkit().getScreenSize();
        setBounds((screenSize.width-230)/2, (screenSize.height-190)/2, 230, 190);
        if(lookJava==true){
            try{
                UIManager.setLookAndFeel(str2);
                SwingUtilities.updateComponentTreeUI(this);
            } catch(Exception e ){}
        }
    }
    public Boolean getyes(){
        return yes;
    }
    
    public void actionPerformed(ActionEvent evt) {
        Object source = evt.getSource();
        if(source == jButton1) {
            ok = true;
            yes=true;
            setVisible(false);
        } else if (source == jButton2)
            setVisible(false);
    }
    
    public boolean showDialog(ConnectInfo transfer,Boolean lookJava) {
        this.lookJava=lookJava;
        ok = false;
        yes=false;
        if(lookJava==false){
            try{
                UIManager.setLookAndFeel(str1);
                SwingUtilities.updateComponentTreeUI(this);
            } catch(Exception e ){}
        }
        show();
        if (ok) {
            transfer.keyLength = Integer.parseInt(jComboBox1.getSelectedItem().toString());
        }
        return ok;
    }
}