CARead.java file code:
Common class CARead extends JPanel {
Private string CA _ Name
Private string CA_ItemData[][] = new string [9] [2];
Private String[] columnNames = {"Certificate field tag", "content"};
Public CARead (string certificate name)
CA _ Name = CertName
/* Three panels are used to display certificate contents */
JTabbedPane tabbedPane = new JTabbedPane()；
JPanel panel normal = new JPanel()；
Tab bepane. add tab ("general information", panel normal);
JPanel panel all = new JPanel()；
panel all . set layout(new BorderLayout())；
Tab bepane. add tab ("all information", pane);
JPanel panel base 64 = new JPanel()；
panel base 64 . set layout(new BorderLayout())；
Tab be pane. addtab ("information in base64 encoded form", panel base64);
/* Read the general information of the certificate */
read _ Normal(panel Normal)；
/* Read the contents of the certificate file string */
read _ Bin(panel all)；
/* Read the certificate file information in Base64 encoding format */
read _ Raw(panel base 64)；
tabbedepane . setselectedindex(0)；
set layout(new GridLayout( 1， 1))；
Add (tabbedepane);
}
Private int Read_Normal(JPanel panel)
String field;
Try {
Certification factory certificate_factory = certification factory
. getInstance(" x . 509 ")；
file inputstream file _ inputstream = new file inputstream(CA _ Name)；
x509 certificate x509 certificate =(x509 certificate)certificate _ factory
. generate certificate(file _ inputstream)；
field = x509 certificate . gettype()；
CA _ item data[0][0]= " type "；
CA _ item data[0][ 1]= Field；
field = integer . tostring(x509 certificate . getversion())；
CA _ item data[ 1][0]= " version "；
CA _ item data[ 1][ 1]= Field；
field = x509 certificate . getsubjectdn()。 getName()；
CA _ item data[2][0]= " title "；
CA _ item data[2][ 1]= Field；
field = x509 certificate . getnotbefore()。 toString()； //Get the start effective date
CA_ItemData[3][0] = "effective date";
CA _ item data[3][ 1]= Field；
Field = certificate. getNotAfter()。 toString()； //Get the expiration date
CA _ item data[4][0]= " Deadline "；
CA _ item data[4][ 1]= Field；
field = x509 certificate . get serial number()。 toString( 16)； //Get the serial number
CA_ItemData[5][0] = "serial number";
CA _ item data[5][ 1]= Field；
field = x509 certificate . getissuerdn()。 getName()； //Get the publisher name
CA_ItemData[6][0] = "publisher name";
CA _ item data[6][ 1]= Field；
field = x509 certificate . getsigalgname()； //get the signature algorithm
CA_ItemData[7][0] = "signature algorithm";
CA _ item data[7][ 1]= Field；
field = x509 certificate . get public key()。 getAlgorithm()； //Algorithm for obtaining public key
CA_ItemData[8][0] = "public key algorithm";
CA _ item data[8][ 1]= Field；
//Close the input stream object
file _ inputstream . close()；
final JTable table = new JTable(CA _ item data，column names)；
TableColumn tc = null// table column control
tc = table.getColumnModel()。 getColumn( 1)； //Get the title
TC . setpreferedwidth(600)； //Set the width
Panel.add (form); //Add to Layout Panel
} catch (exception exception) {
exception . printstacktrace()； //exception capture,
return- 1；
}
Returns 0;
}
//Read the binary fingerprint file
Private int Read_Bin(JPanel panel) (
Try {
file inputstream file _ inputstream = new file inputstream(CA _ Name)；
data inputstream data _ inputstream = new data inputstream(
file _ inputstream)；
Certification Factory Certification Factory = Certification Factory
. getInstance(" x . 509 ")；
byte[]bytes = new byte[data _ inputstream . available()]；
Data_inputstream.readFully (bytes);
ByteArrayInputStream bais = New ByteArrayInputStream (bytes);
JEditorPane Cert _ EditorPane
cert _ editor pane = new jeditor pane()；
X509Certificate cert = null
//Traverse to get all certificate properties.
if(Bais . available()>； 0)
{
Cert = (X509Certificate) certificate factory. Generate a certificate (BAIS);
cert _ editor pane . settext(cert . tostring())；
}
cert _ editor pane . disable()；
JScrollPane edit _ scroll = new JScrollPane(Cert _ editor pane)；
panel . add(edit _ scroll)；
file _ inputstream . close()；
data _ inputstream . close()；
} catch (exception exception) {
exception . printstacktrace()；
return- 1；
}
Returns 0;
}
Private int Read_Raw(JPanel panel) (
Try {
JEditorPane Cert _ editor pane = new JEditorPane()；
string buffer strBuffer = new string buffer()；
File inputFile = new file (ca _ name);
file reader in = new file reader(input file)；
char[]buf = new char[2000]；
int len = in.read(buf，0，2000)；
for(int I = 1； I & ltleni++) {
strbuffer . append(buf[I])；
}
in . close()；
cert _ editor pane . settext(strbuffer . tostring())；
cert _ editor pane . disable()；
JScrollPane edit _ scroll = new JScrollPane(Cert _ editor pane)；
panel . add(edit _ scroll)；
} catch (exception exception) {
exception . printstacktrace()；
return- 1；
}
Returns 0;
}
}