Question

我是java的新手。我已经有一个用于图像加密的AES算法代码。我的问题是我只想为我的加密图像添加密钥，只有我给密钥的人才能解密图像示例，如对称加密，md5，pgp或其他任何你应该建议我用作密钥的东西。这是我的代码

package crypto;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import javax.crypto.Cipher;
import javax.crypto.CipherOutputStream;
import javax.crypto.spec.SecretKeySpec;
import javax.swing.JFileChooser;
import javax.swing.JOptionPane;

/**
 *
 * @author fIZI/Z47
 */
public class ImageCrypto extends javax.swing.JFrame {

    /**
     * Creates new form ImageCrypto
     */
    public ImageCrypto() {
        initComponents();
    }

    private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {                                         
        // TODO add your handling code here:
        JFileChooser chooser = new JFileChooser();
        chooser.showOpenDialog(null);
        File f = chooser.getSelectedFile();
        file_path.setText(f.getAbsolutePath());
    }                                        

    private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) {                                         
        // TODO add your handling code here:
        try{
            FileInputStream file = new FileInputStream(file_path.getText());
            FileOutputStream outStream = new FileOutputStream("C:\\Users\\Z47\\Desktop\\Encrypt Image.jpg");
            byte k[]="FiZi1701NuLl5252".getBytes();
            SecretKeySpec key = new SecretKeySpec(k, "AES");
            Cipher enc = Cipher.getInstance("AES");
            enc.init(Cipher.ENCRYPT_MODE, key);
            CipherOutputStream cos = new CipherOutputStream(outStream, enc);
            byte[] buf = new byte[1024];
            int read;
            while((read=file.read(buf))!=-1){
                cos.write(buf,0,read);
            }
            file.close();
            outStream.flush();
            cos.close();
            JOptionPane.showMessageDialog(null, "The image was encrypted successfully !");
        }catch(Exception e){
            JOptionPane.showMessageDialog(null, e);
        }
    }                                        

    private void jButton3ActionPerformed(java.awt.event.ActionEvent evt) {                                         
        // TODO add your handling code here:
        try{
            FileInputStream file = new FileInputStream(file_path.getText());
            FileOutputStream outStream = new FileOutputStream("C:\\Users\\Z47\\Desktop\\Decrypt Image.jpg");
            byte k[]="FiZi1701NuLl5252".getBytes();
            SecretKeySpec key = new SecretKeySpec(k, "AES");
            Cipher enc = Cipher.getInstance("AES");
            enc.init(Cipher.DECRYPT_MODE, key);
            CipherOutputStream cos = new CipherOutputStream(outStream, enc);
            byte[] buf = new byte[1024];
            int read;
            while((read=file.read(buf))!=-1){
                cos.write(buf,0,read);
            }
            file.close();
            outStream.flush();
            cos.close();
            JOptionPane.showMessageDialog(null, "Success! your image was decrypted. Click OK to preview the image.");
            Runtime.getRuntime().exec("rundll32 url.dll, FileProtocolHandler "+"C:\\Users\\Z47\\Desktop\\Decrypt Image.jpg");
        }catch(Exception e){
            JOptionPane.showMessageDialog(null, e);
        }
    }                                        

    private void file_pathActionPerformed(java.awt.event.ActionEvent evt) {                                          
        // TODO add your handling code here:
    }                                         

    /**
     * @param args the command line arguments
     */
    public static void main(String args[]) {
        /* Set the Nimbus look and feel */
        //<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
        /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
         * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html 
         */
        try {
            for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
                if ("Nimbus".equals(info.getName())) {
                    javax.swing.UIManager.setLookAndFeel(info.getClassName());
                    break;
                }
            }
        } catch (ClassNotFoundException ex) {
            java.util.logging.Logger.getLogger(ImageCrypto.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(ImageCrypto.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(ImageCrypto.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(ImageCrypto.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        }
        //</editor-fold>

        /* Create and display the form */
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new ImageCrypto().setVisible(true);
            }
        });
    }
    // Variables declaration - do not modify                     
    private javax.swing.JTextField file_path;
    private javax.swing.JButton jButton1;
    private javax.swing.JButton jButton2;
    private javax.swing.JButton jButton3;
    private javax.swing.JPanel jPanel2;
    // End of variables declaration                   
}

顺便说一下，我在JFrame中使用netbeans并运行GUI。任何人都可以显示密钥的完整代码吗？与我的编码相结合。

Answer 1

我只是想为我的加密图片添加密钥而只添加我的人给密钥只能解密图像

在您的代码中，您的密钥为byte[] k。

如果您想将其与加密图像一起安全地发送给收件人，您可能需要考虑使用非对称密钥加密算法来加密您的密钥。

实际上，您将使用收件人的公钥来加密AES算法中使用的密钥。只有他们才能解密该密钥才能解密消息。

如何使用AES算法放置图像加密密钥

1 个答案: