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@peterkir
Created March 24, 2020 14:09
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Java import certificate into keystore
package io.klib.certificates;
import java.io.ByteArrayInputStream;
import java.io.DataInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.security.KeyStore;
import java.security.cert.Certificate;
import java.security.cert.CertificateFactory;
public class ImportCertificateInKeyStore {
public static void main(String[] argv) throws Exception {
String certFile = "";
String certAlias = "";
String keystoreFileString = "";
String keystorePass = "";
for (int i = 0; i < argv.length; i++) {
String[] argArray = argv[i].split("=");
String key = argArray[0];
String value = argArray[1];
switch (key) {
case "certFile":
certFile = value;
break;
case "certAlias":
certAlias = value;
break;
case "keystoreFile":
keystoreFileString = value;
break;
case "keystorePass":
keystorePass = value;
break;
default:
System.out.format("wrong argument specified %s", key);
System.exit(1);
break;
}
}
if (certFile == "" || certAlias == "" || keystoreFileString == "" || keystorePass == "") {
System.out.format(
"\nfollowing args are required \ncertFile=%s\ncertAlias=%s\nkeystoreFile=%s\nkeystorePass=%s\n\n",
certFile, certAlias, keystoreFileString, keystorePass);
System.exit(1);
}
System.out.format("\nimporting certificate %s with alias %s into keystore %s\n\n", certFile, certAlias,
keystoreFileString);
FileInputStream is = new FileInputStream(keystoreFileString);
KeyStore keystore = KeyStore.getInstance(KeyStore.getDefaultType());
keystore.load(is, keystorePass.toCharArray());
char[] password = keystorePass.toCharArray();
//////
CertificateFactory cf = CertificateFactory.getInstance("X.509");
InputStream certstream = fullStream(certFile);
Certificate certs = cf.generateCertificate(certstream);
///
File keystoreFile = new File(keystoreFileString);
// Load the keystore contents
FileInputStream in = new FileInputStream(keystoreFile);
keystore.load(in, password);
in.close();
// Add the certificate
keystore.setCertificateEntry(certAlias, certs);
// Save the new keystore contents
FileOutputStream out = new FileOutputStream(keystoreFile);
keystore.store(out, password);
out.close();
System.out.format("finished\n");
}
private static InputStream fullStream(String fname) throws IOException {
FileInputStream fis = new FileInputStream(fname);
DataInputStream dis = new DataInputStream(fis);
byte[] bytes = new byte[dis.available()];
dis.readFully(bytes);
ByteArrayInputStream bais = new ByteArrayInputStream(bytes);
return bais;
}
}
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