Java Keytool
The Java Keytool is a command line tool which can generate public key / private key pairs and store them in a Java KeyStore. The Keytool executable is distributed with the Java SDK (or JRE), so if you have an SDK installed you will also have the Keytool executable.
# GENERATE A SELF SIGNED CERTIFICATE
keytool -genkey -alias 'myalias' -keyalg RSA -keysize 2048 -keystore yoursite.jks -storepass '12345' -keypass '6789'
# EXPORT A CERTIFICATE FROM A JKS
keytool -export -alias selfsigned -keystore keystore.jks -rfc -file X509_certificate.cer
# LIST JKS DATA
keytool -v -list -storetype pkcs12 -keystore equipamento.pfx
# GENERATE JKS FROM PFX
keytool -alias p3za8tyicxy755kio0ofdrsn4ci= -importkeystore -srckeystore equipamento_a1.pfx -srcstoretype pkcs12 -destkeystore clientcert.jks -deststoretype JKS
# EXPORT KEYSTORE TO CER
keytool -export -alias p3za8tyicxy755kio0ofdrsn4ci= -file client.cer -keystore clientcert.jks
# CREATE JKS TRUSTSTORE FROM CER FILE
keytool -import -trustcacerts -alias p3za8tyicxy755kio0ofdrsn4ci= -file public.cer -keystore truststore.jks
# IMPORT TRUSTSTORE TO JVM
keytool -import -alias p3za8tyicxy755kio0ofdrsn4ci= -keystore "C:\Program Files\Java\jdk1.8.0_45\jre\lib\security\cacerts" -storepass changeit -file truststore.jks
# DELETE ALIAS FROM JVM
keytool -delete -alias p3za8tyicxy755kio0ofdrsn4ci= -keystore "C:\Program Files\Java\jdk1.8.0_45\jre\lib\security\cacerts"
keytool -import -alias p3za8tyicxy755kio0ofdrsn4ci= -keystore cacerts -file vip_cert.der
keytool -keystore new_identity_keystore.jks -storepass jkgbseMM@@387 -storetype JKS -keypass jkgbseMM@@387 -alias server -certfile tempcertfile.crt -keyfile your_domain_name.key-keyfilepass jkgbseMM@@387
keytool -import -trustcacerts -alias certAlias -file client.cer -keystore truststore.jks
Sun Microsystems Utility
This Java code is a utility that automates the process of downloading a server's SSL certificate and adding it to a Java KeyStore (jssecacerts). It's commonly used to handle SSL certificate issues in Java applications when connecting to a server with a certificate not yet trusted by the local Java runtime.
/*
* Copyright 2006 Sun Microsystems, Inc. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of Sun Microsystems nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
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;
public class InstallCert {
private static final char[] HEXDIGITS = "0123456789abcdef".toCharArray();
private static final String HOST = "receitaws.com.br";
private static final int PORT = 443;
private static final String PASSWORD = "changeit";
public static void main(String[] args) throws Exception {
File file = new File("jssecacerts");
if (file.isFile() == false) {
char SEP = File.separatorChar;
File dir = new File(System.getProperty("java.home") + SEP + "lib" + SEP + "security");
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, PASSWORD.toCharArray());
in.close();
SSLContext context = SSLContext.getInstance("TLS");
TrustManagerFactory tmf = TrustManagerFactory.getInstance(TrustManagerFactory.getDefaultAlgorithm());
tmf.init(ks);
X509TrustManager defaultTrustManager = (X509TrustManager) tmf.getTrustManagers()[0];
SavingTrustManager tm = new SavingTrustManager(defaultTrustManager);
context.init(null, new TrustManager[]{tm}, null);
SSLSocketFactory factory = context.getSocketFactory();
System.out.println("Opening connection to " + HOST + ":" + PORT + "...");
SSLSocket socket = (SSLSocket) factory.createSocket(HOST, PORT);
socket.setSoTimeout(10000);
try {
System.out.println("Starting SSL handshake...");
socket.startHandshake();
socket.close();
System.out.println();
System.out.println("No errors, certificate is already trusted");
}
catch (SSLException e) {
System.out.println();
e.printStackTrace(System.out);
}
X509Certificate[] chain = tm.chain;
if (chain == null) {
System.out.println("Could not obtain server certificate chain");
return;
}
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
System.out.println();
System.out.println("Server sent " + chain.length + " certificate(s):");
System.out.println();
MessageDigest sha1 = MessageDigest.getInstance("SHA1");
MessageDigest md5 = MessageDigest.getInstance("MD5");
for (int i = 0; i < chain.length; i++) {
X509Certificate cert = chain[i];
System.out.println(" " + (i + 1) + " 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()));
System.out.println();
}
System.out.println("Enter certificate to add to trusted keystore or 'q' to quit: [1]");
String line = reader.readLine().trim();
int k;
try {
k = (line.length() == 0) ? 0 : Integer.parseInt(line) - 1;
} catch (NumberFormatException e) {
System.out.println("KeyStore not changed");
return;
}
X509Certificate cert = chain[k];
String alias = HOST + "-" + (k + 1);
ks.setCertificateEntry(alias, cert);
OutputStream out = new FileOutputStream("jssecacerts");
ks.store(out, PASSWORD.toCharArray());
out.close();
System.out.println();
System.out.println(cert);
System.out.println();
System.out.println("Added certificate to keystore 'jssecacerts' using alias '"
+ alias + "'");
}
private static String toHexString(byte[] bytes) {
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(X509TrustManager tm) {
this.tm = tm;
}
@Override
public X509Certificate[] getAcceptedIssuers() {
throw new UnsupportedOperationException();
}
@Override
public void checkClientTrusted(X509Certificate[] chain, String authType)
throws CertificateException {
throw new UnsupportedOperationException();
}
@Override
public void checkServerTrusted(X509Certificate[] chain, String authType)
throws CertificateException {
this.chain = chain;
tm.checkServerTrusted(chain, authType);
}
}
}