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@nuboat
Last active August 29, 2015 14:02
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InstallCert
package com.thjug.tools.sslcert;
import javax.net.ssl.*;
import java.io.*;
import java.security.KeyStore;
import java.security.MessageDigest;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
/**
* Default cert path : $JAVA_HOME\jre\lib\security
* @author nuboat
*/
public class InstallCert {
public static void main(final String[] args) throws Exception {
final String host = "facebook.com";
final int port = 443;
final char[] passphrase = "changeit".toCharArray();
final String source = "./src/main/resources/cacerts";
final String output = "./src/main/resources/jssecacerts";
final char[] outputpassphase = "changeit".toCharArray();
final File file = new File(source);
System.out.println("Loading KeyStore " + file + "...");
final KeyStore ks;
try (final InputStream in = new FileInputStream(file)) {
ks = KeyStore.getInstance(KeyStore.getDefaultType());
ks.load(in, passphrase);
}
final SSLContext context = SSLContext.getInstance("TLS");
final TrustManagerFactory tmf =
TrustManagerFactory.getInstance(TrustManagerFactory.getDefaultAlgorithm());
tmf.init(ks);
final X509TrustManager defaultTrustManager = (X509TrustManager) tmf.getTrustManagers()[0];
final SavingTrustManager tm = new SavingTrustManager(defaultTrustManager);
context.init(null, new TrustManager[]{tm}, null);
final SSLSocketFactory factory = context.getSocketFactory();
System.out.println("Opening connection to " + host + ":" + port + "...");
try (final SSLSocket socket = (SSLSocket) factory.createSocket(host, port)) {
socket.setSoTimeout(10000);
System.out.println("Starting SSL handshake...");
socket.startHandshake();
System.out.println();
System.out.println("No errors, certificate is already trusted");
return;
} catch (final Exception e) {
System.out.println("Errors: " + e.getMessage());
}
final X509Certificate[] chain = tm.chain;
if (chain == null) {
System.out.println("Could not obtain server certificate chain");
return;
}
System.out.println();
System.out.println("Server sent " + chain.length + " certificate(s):");
System.out.println();
final MessageDigest sha1 = MessageDigest.getInstance("SHA1");
final MessageDigest md5 = MessageDigest.getInstance("MD5");
for (final X509Certificate cert : chain) {
System.out.println(" Subject " + cert.getSubjectDN());
System.out.println(" Issuer " + cert.getIssuerDN());
sha1.update(cert.getEncoded());
System.out.println(" sha1 " + toHexString(sha1.digest()));
md5.update(cert.getEncoded());
System.out.println(" md5 " + toHexString(md5.digest()));
}
int i = 1;
try (final OutputStream out = new FileOutputStream(output)) {
for (final X509Certificate cert : chain) {
final String alias = host + "-" + i++;
ks.setCertificateEntry(alias, cert);
ks.store(out, outputpassphase);
System.out.println();
System.out.println(cert);
System.out.println();
System.out.println("Added certificate to keystore 'cacerts.jks' using alias '" + alias + "'");
}
}
}
private static final char[] HEXDIGITS = "0123456789abcdef".toCharArray();
private static String toHexString(final byte[] bytes) {
final StringBuilder sb = new StringBuilder(bytes.length * 3);
for (int b : bytes) {
b &= 0xff;
sb.append(HEXDIGITS[b >> 4]);
sb.append(HEXDIGITS[b & 15]);
sb.append(' ');
}
return sb.toString();
}
private static class SavingTrustManager implements X509TrustManager {
private final X509TrustManager tm;
private X509Certificate[] chain;
SavingTrustManager(final X509TrustManager tm) {
this.tm = tm;
}
@Override
public X509Certificate[] getAcceptedIssuers() {
return null;
}
@Override
public void checkClientTrusted(final X509Certificate[] chain, final String authType)
throws CertificateException {
throw new UnsupportedOperationException();
}
@Override
public void checkServerTrusted(final X509Certificate[] chain, final String authType)
throws CertificateException {
this.chain = chain;
tm.checkServerTrusted(chain, authType);
}
}
}
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