通过JAVA来读取数字证书

布满荆棘的人生 2022-04-22 17:52 220阅读 0赞

CARead\_Demo.java文件

import java.awt.BorderLayout;

import java.awt.event.WindowAdapter;

import java.awt.event.WindowEvent;

import javax.swing.JFrame;

public class CARead\_Demo \{

CARead\_Demo()

JFrame frame = new JFrame("证书阅读器");

frame.addWindowListener(new WindowAdapter() \{

public void windowClosing(WindowEvent e) \{System.exit(0);\}

\});

frame.getContentPane().add(new CARead("robin.crt"),BorderLayout.CENTER);

frame.setSize(700, 425);

frame.setVisible(true);

CARead.java文件

import javax.swing.\*;

import java.awt.\*;

import java.awt.event.\*;

import javax.swing.table.\*;

import java.security.cert.CertificateFactory;

import java.security.cert.X509Certificate;

import java.io.\*;

public class CARead extends JPanel \{

private String  CA\_Name;

private String  CA\_ItemData\[\]\[\] = new String\[9\]\[2\];

private String\[\]  columnNames = \{ "证书字段标记", "内容" \};

public CARead(String CertName) \{

CA\_Name = CertName;

/\* 三个Panel用来显示证书内容 \*/

JTabbedPane tabbedPane = new JTabbedPane();

JPanel panelNormal = new JPanel();

tabbedPane.addTab("普通信息", panelNormal);

JPanel panelAll = new JPanel();

panelAll.setLayout(new BorderLayout());

tabbedPane.addTab("所有信息", panelAll);

JPanel panelBase64 = new JPanel();

panelBase64.setLayout(new BorderLayout());

tabbedPane.addTab("Base64编码形式的信息", panelBase64);

/\* 读取证书常规信息 \*/

Read\_Normal(panelNormal);

/\* 读取证书文件字符串表示内容 \*/

Read\_Bin(panelAll);

/\* 以Base64编码形式读取证书文件的信息 \*/

Read\_Raw(panelBase64);

tabbedPane.setSelectedIndex(0);

setLayout(new GridLayout(1, 1));

add(tabbedPane);

private int Read\_Normal(JPanel panel) \{

String Field;

try \{

CertificateFactory certificate\_factory = CertificateFactory

.getInstance("X.509");

FileInputStream file\_inputstream = new FileInputStream(CA\_Name);

X509Certificate x509certificate = (X509Certificate) certificate\_factory

.generateCertificate(file\_inputstream);

Field = x509certificate.getType();

CA\_ItemData\[0\]\[0\] = "类型";

CA\_ItemData\[0\]\[1\] = Field;

Field = Integer.toString(x509certificate.getVersion());

CA\_ItemData\[1\]\[0\] = "版本";

CA\_ItemData\[1\]\[1\] = Field;

Field = x509certificate.getSubjectDN().getName();

CA\_ItemData\[2\]\[0\] = "标题";

CA\_ItemData\[2\]\[1\] = Field;

Field= x509certificate.getNotBefore().toString();//得到开始有效日期

CA\_ItemData\[3\]\[0\] = "开始有效日期";

CA\_ItemData\[3\]\[1\] = Field;

Field= x509certificate. getNotAfter().toString();//得到截止日期

CA\_ItemData\[4\]\[0\] = "截止日期";

CA\_ItemData\[4\]\[1\] = Field;

Field= x509certificate.getSerialNumber().toString(16);//得到序列号

CA\_ItemData\[5\]\[0\] = "序列号";

CA\_ItemData\[5\]\[1\] = Field;

Field=x509certificate.getIssuerDN().getName();//得到发行者名

CA\_ItemData\[6\]\[0\] = "发行者名";

CA\_ItemData\[6\]\[1\] = Field;

Field=x509certificate.getSigAlgName();//得到签名算法

CA\_ItemData\[7\]\[0\] = "签名算法";

CA\_ItemData\[7\]\[1\] = Field;

Field =x509certificate.getPublicKey().getAlgorithm();//得到公钥算法

CA\_ItemData\[8\]\[0\] = "公钥算法";

CA\_ItemData\[8\]\[1\] = Field;

file\_inputstream.close();

final JTable table = new JTable(CA\_ItemData, columnNames);

TableColumn tc = null;

tc = table.getColumnModel().getColumn(1);

tc.setPreferredWidth(600);

panel.add(table);

\}  catch (Exception exception) \{

exception.printStackTrace();

return -1;

return 0;

private int Read\_Bin(JPanel panel) \{

try \{

FileInputStream file\_inputstream = new FileInputStream(CA\_Name);

DataInputStream data\_inputstream = new DataInputStream(

file\_inputstream);

CertificateFactory certificatefactory = CertificateFactory

.getInstance("X.509");

byte\[\] bytes = new byte\[data\_inputstream.available()\];

data\_inputstream.readFully(bytes);

ByteArrayInputStream bais = new ByteArrayInputStream(bytes);

JEditorPane Cert\_EditorPane;

Cert\_EditorPane =  new JEditorPane();

X509Certificate cert= null;

//遍历得到所有的证书属性

if (bais.available() > 0)

cert = (X509Certificate) certificatefactory .generateCertificate(bais);

Cert\_EditorPane.setText( cert.toString());

Cert\_EditorPane.disable();

JScrollPane edit\_scroll = new JScrollPane(Cert\_EditorPane);

panel.add(edit\_scroll);

file\_inputstream.close();

data\_inputstream.close();

\}  catch (Exception exception) \{

exception.printStackTrace();

return -1;

return 0;

private int Read\_Raw(JPanel panel) \{

try \{

JEditorPane Cert\_EditorPane = new JEditorPane();

StringBuffer strBuffer =new StringBuffer();

File inputFile = new File(CA\_Name);

FileReader in = new FileReader(inputFile);

char\[\] buf = new char\[2000\];

int len = in.read(buf, 0, 2000);

for (int i = 1; i < len; i++) \{

strBuffer.append(buf\[i\]);

in.close();

Cert\_EditorPane.setText(strBuffer.toString());

Cert\_EditorPane.disable();

JScrollPane edit\_scroll = new JScrollPane(Cert\_EditorPane);

panel.add(edit\_scroll);

\}  catch (Exception exception) \{

exception.printStackTrace();

return -1;

return 0;

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[https_blog.csdn.net_jiangjunshow]: https://blog.csdn.net/jiangjunshow/article/details/77338485

通过JAVA来读取数字证书

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