2.openas2-server.2.7.0.source-code.CheckCertificate Maven / Gradle / Ivy
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Open source implementation of the AS2 standard for signed encrypted and compressed document transfer
import javax.net.ssl.*;
import java.io.*;
import java.security.KeyStore;
import java.security.NoSuchAlgorithmException;
import java.security.cert.CertificateException;
import java.security.cert.PKIXParameters;
import java.security.cert.TrustAnchor;
import java.security.cert.X509Certificate;
import java.util.Iterator;
/**
* Class used to add the server's certificate to the KeyStore with your trusted
* certificates.
*/
public class CheckCertificate
{
public static int CheckCertStore(String host, int port, String targetKeyStore, String keyStorePwd) throws Exception
{
if (keyStorePwd == null || keyStorePwd.length() < 1)
keyStorePwd = "changeit";
char[] passphrase = keyStorePwd.toCharArray();
File file = new File(targetKeyStore);
if (file.isFile() == false)
{
char SEP = File.separatorChar;
File dir = new File(System.getProperty("java.home") + SEP + "lib" + SEP + "security");
/* Check if this is a JDK home */
if (!dir.isDirectory())
{
dir = new File(System.getProperty("java.home") + SEP + "jre" + SEP + "lib" + SEP + "security");
}
if (!dir.isDirectory()) { throw new Exception(
"The JSSE folder could not be identified. Please check that JSSE is installed."); }
file = new File(dir, "jssecacerts");
if (file.isFile() == false)
{
file = new File(dir, "cacerts");
}
}
// System.out.println("Loading KeyStore " + file + "...");
InputStream in = new FileInputStream(file);
KeyStore ks = KeyStore.getInstance(KeyStore.getDefaultType());
ks.load(in, passphrase);
in.close();
SSLSocket socket = null;
try {
socket = (SSLSocket) SSLSocketFactory.getDefault().createSocket(host, port);
}
catch (Exception e) {
throw new Exception("\nSOCKET FAIL ::: Reason: " + e + "\n");
}
SSLParameters sslParms = socket.getSSLParameters();
String [] protocols = sslParms.getProtocols();
//String [] protocols = socket.getEnabledProtocols();
//for (int i = 0; i < protocols.length; i++) System.out.println("\nProtocol : " + protocols[i]);
TrustManagerFactory tmf = TrustManagerFactory.getInstance(TrustManagerFactory.getDefaultAlgorithm());
tmf.init(ks);
X509TrustManager defaultX509TM = null;
for (TrustManager tm : tmf.getTrustManagers()) {
if (tm instanceof X509TrustManager) {
defaultX509TM = (X509TrustManager) tm;
break;
}
}
SavingTrustManager tm = new SavingTrustManager(defaultX509TM);
String lastExceptionMsg = "";
for (int i = 0; i < protocols.length; i++)
{
SSLContext context;
try
{
context = SSLContext.getInstance(protocols[i]);
}
catch (NoSuchAlgorithmException e1)
{
lastExceptionMsg = e1.getMessage();
continue;
}
context.init(null, new TrustManager[]{ tm }, null);
SSLSocketFactory factory = context.getSocketFactory();
try
{
socket = (SSLSocket) factory.createSocket(host, port);
}
catch (IOException io)
{
/*possibly an unsupported protocol so keep going */
lastExceptionMsg = io.getMessage();
continue;
}
catch (Exception e)
{
throw new Exception(e);
}
break; // Must have successfully connected now
}
if (socket == null)
throw new Exception("Failed to connect to remote system: " + lastExceptionMsg);
try
{
socket.setSoTimeout(10000);
// System.out.println("Starting SSL handshake...");
socket.startHandshake();
socket.close();
//System.out.println();
//System.out.println("No errors, certificate is already trusted");
// Trusted cert so no need to do anything
System.out.println("No errors, certificate is already trusted");
return 0;
}
catch (SSLHandshakeException e)
{
//e.printStackTrace(System.out);
System.out.println("\nException caught starting SSL handshake so set up a local certificate store with trust chain....\n\n");
}
X509Certificate[] chain = tm.chain;
if (chain == null)
{
throw new Exception("Could not obtain server certificate chain");
}
System.out.println("Number of certificates in chain: " + chain.length);
// If the chain contains intermediates then Only install the certificate chain not the host cert
// Otherwise if the chain length is 1 then probably the root certificate is not trusted so store that
int startNdx = (chain.length == 1)?0:1;
if (startNdx == 0)
{
findClosestMatchTrustedCert(ks, chain[0]);
System.out.println("\n\nThe root certificate is not trusted so storing it locally... ");
}
for (int k = 0; k < chain.length; k++)
{
X509Certificate cert = chain[k];
String alias = host + "-" + (k + 1);
ks.setCertificateEntry(alias, cert);
OutputStream out = new FileOutputStream(targetKeyStore);
ks.store(out, passphrase);
out.close();
System.out.println("Installed certificate as trusted: " + cert.getIssuerDN() + "::" + cert.getSigAlgName());
}
return 0;
}
private static void findClosestMatchTrustedCert(KeyStore ks, X509Certificate rootCert)
{
// This class retrieves the most-trusted CAs from the keystore
PKIXParameters params;
try
{
params = new PKIXParameters(ks);
} catch (Exception e)
{
// TODO Auto-generated catch block
e.printStackTrace();
return;
}
String rootCertDN = rootCert.getIssuerDN().getName();
String org = getDNField("O", rootCertDN).toLowerCase();
String org1StWord = org.replaceAll("(\\S*)[^$]*", "$1").toLowerCase();
System.out.println("Looking for matches to root certificate DN:\n\t" + rootCertDN
+ "\n\t\tReference certificate signing algorthim: " + rootCert.getSigAlgName()
+ "\n\n\tTrusted certificate(s) most closely matching \"O\" field of root certificate DN:");
// Get the set of trust anchors, which contain the most-trusted CA certificates
Iterator it = params.getTrustAnchors().iterator();
boolean found = false;
while( it.hasNext() ) {
TrustAnchor ta = (TrustAnchor)it.next();
// Get certificate
X509Certificate cert = ta.getTrustedCert();
String dn = cert.getIssuerDN().getName();
String lcDN = dn.toLowerCase();
if (lcDN.contains(org) || lcDN.contains(org1StWord))
{
found = true;
System.out.println(
"\t\tTrusted certificate DN:\n\t\t" + dn
+ "\n\t\tTrusted certificate signing algorthim: " + cert.getSigAlgName());
}
}
if (!found) System.out.println("\n\t\t\tNo matching certificates found");
}
private static String getDNField(String dnFld, String dn)
{
return dn.contains(" "+dnFld+"=\"")?dn.replaceAll(".* "+dnFld+"=\"([^\"]*)\",[^$]*", "$1"):dn.replaceAll(".* "+dnFld+"=([^,]*),[^$]*", "$1");
}
private static class SavingTrustManager implements X509TrustManager
{
private final X509TrustManager tm;
private X509Certificate[] chain;
SavingTrustManager(X509TrustManager tm)
{
this.tm = tm;
}
public X509Certificate[] getAcceptedIssuers()
{
return tm.getAcceptedIssuers();
}
public void checkClientTrusted(X509Certificate[] chain, String authType) throws CertificateException
{
tm.checkClientTrusted(chain, authType);
}
public void checkServerTrusted(X509Certificate[] chain, String authType) throws CertificateException
{
this.chain = chain;
tm.checkServerTrusted(chain, authType);
}
}
public static void main(String[] args) throws Exception
{
String host;
int port;
String keyStoreFile;
String passphrase;
if ((args.length == 2) || (args.length == 3))
{
String[] c = args[0].split(":");
host = c[0];
port = (c.length == 1) ? 443 : Integer.parseInt(c[1]);
keyStoreFile = args[1];
passphrase = (args.length == 2) ? "changeit" : args[2];
}
else
{
System.out.println("Usage: java CheckCertChain [:port] [passphrase]");
return;
}
CheckCertStore(host, port, keyStoreFile, passphrase);
}
}
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