The getCertificateAlias() method of java.security.KeyStore class is used to get name of the first KeyStore entry which has the specified Certificate.
Syntax:
public final String getCertificateAlias(Certificate cert)
throws KeyStoreException
Parameter: This method accepts the certificate name a parameter which is to be matched with Keystore entry.
Return Value: This method returns the name of the first KeyStore entry which has the specified Certificate.
Exception: This method throws KeyStoreException if you don’t initialize this keystore.
Note: All the programs in this article won’t run on online IDE as no ‘privatekey’ Keystore exists. You can check this code on Java compiler on your system. To check this code, create a Keystore ‘privatekey’ on your system and set your own keystore password to access that keystore.
Below are the examples to illustrate the getCertificateAlias() method:
Example 1:
Java
// Java program to demonstrate getCertificateAlias() methodimport java.security.*;import java.security.cert.*;import java.util.*;import java.io.*;public class GFG { public static void main(String[] argv) { try { // creating the object of KeyStore // and getting instance // By using getInstance() method KeyStore sr = KeyStore.getInstance("JKS"); // keystore password is required to access keystore char[] pass = ("123456").toCharArray(); // creating and initializing object of InputStream InputStream is = new FileInputStream( "f:/java/private Key.store"); // initializing keystore object sr.load(is, pass); // getting the certificate X509Certificate cert = (X509Certificate)sr .getCertificate("ftpkey"); // getting alias name for the keyentry // using getCertificateAlias() method String alias = sr.getCertificateAlias(cert); // display the result System.out.println("alias name for the particular entry : " + alias); } catch (NoSuchAlgorithmException e) { System.out.println("Exception thrown : " + e); } catch (NullPointerException e) { System.out.println("Exception thrown : " + e); } catch (KeyStoreException e) { System.out.println("Exception thrown : " + e); } catch (FileNotFoundException e) { System.out.println("Exception thrown : " + e); } catch (IOException e) { System.out.println("Exception thrown : " + e); } catch (CertificateException e) { System.out.println("Exception thrown : " + e); } }} |
Example 2: For KeyStoreException
Java
// Java program to demonstrate getCertificateAlias() methodimport java.security.*;import java.security.cert.*;import java.util.*;import java.io.*;public class GFG { public static void main(String[] argv) { try { // creating the object of KeyStore // and getting instance // By using getInstance() method KeyStore sr = KeyStore.getInstance("JKS"); // keystore password is required to access keystore char[] pass = ("123456").toCharArray(); // creating and initializing object of InputStream InputStream is = new FileInputStream( "f:/java/private Key.store"); // initializing keystore object // sr.load(is, pass); // getting the certificate X509Certificate cert = (X509Certificate)sr .getCertificate("ftpkey"); // getting alias name for the keyentry // using getCertificateAlias() method String alias = sr.getCertificateAlias(cert); // display the result System.out.println("alias name for the particular entry : " + alias); } catch (FileNotFoundException e) { System.out.println("Exception thrown : " + e); } catch (NullPointerException e) { System.out.println("Exception thrown : " + e); } catch (KeyStoreException e) { System.out.println("Exception thrown : " + e); } }} |
