Java trusted certificates list

How can I get a list of trusted root certificates in Java?

Question: I have one certificates installed in java and I can execute this command under the JRE security director: That gives me the list of installed certificates, now what i am trying is that all the certificates that are listed under this command to be copied in a folder named temp and this temp folder i have created under in unix at the following so please advise how can i opy all the certifactes from keystore to a folder named temp Solution: If you’re trying to dump the output to file the following command will work: For verbose: Question: I want to retrieve certificate with password from personal my store by java programming. I found some code of retrieving certificate but it shows all certificates.

How can I get a list of trusted root certificates in Java?

I would like to be able to get access to all trusted root certificates programmatically in a Java app.

I was looking at the keystore interface, but I’m hoping to get the list of trusted roots that’s implicit with the JRE.

Is this accessible anywhere?

There’s an example that shows how to get a Set of the root certificates and iterate through them called Listing the Most-Trusted Certificate Authorities (CA) in a Key Store. Here’s a slightly modified version that prints out each certificate (tested on Windows Vista).

import java.io.File; import java.io.FileInputStream; import java.io.IOException; import java.security.InvalidAlgorithmParameterException; import java.security.KeyStore; import java.security.KeyStoreException; 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; public class Main < public static void main(String[] args) < try < // Load the JDK's cacerts keystore file String filename = System.getProperty("java.home") + "/lib/security/cacerts".replace('/', File.separatorChar); FileInputStream is = new FileInputStream(filename); KeyStore keystore = KeyStore.getInstance(KeyStore.getDefaultType()); String password = "changeit"; keystore.load(is, password.toCharArray()); // This class retrieves the most-trusted CAs from the keystore PKIXParameters params = new PKIXParameters(keystore); // Get the set of trust anchors, which contain the most-trusted CA certificates Iterator it = params.getTrustAnchors().iterator(); while( it.hasNext() ) < TrustAnchor ta = (TrustAnchor)it.next(); // Get certificate X509Certificate cert = ta.getTrustedCert(); System.out.println(cert); >> catch (CertificateException e) < >catch (KeyStoreException e) < >catch (NoSuchAlgorithmException e) < >catch (InvalidAlgorithmParameterException e) < >catch (IOException e) < >> > 

This should be more flexible using the default trust store in the system to get all certificates:

TrustManagerFactory trustManagerFactory = TrustManagerFactory.getInstance(TrustManagerFactory.getDefaultAlgorithm()); List x509Certificates = new ArrayList<>(); trustManagerFactory.init((KeyStore)null); Arrays.asList(trustManagerFactory.getTrustManagers()).stream().forEach(t -> < x509Certificates.addAll(Arrays.asList(((X509TrustManager)t).getAcceptedIssuers())); >); 

A working example, combining concept from Bill the Lizard and k_o_ answer:

import java.io.FileInputStream; import java.nio.file.Path; import java.nio.file.Paths; import java.security.KeyStore; import java.security.cert.X509Certificate; import javax.net.ssl.TrustManager; import javax.net.ssl.TrustManagerFactory; import javax.net.ssl.X509TrustManager; public class JDKTrustStoreCertListing < public static void main(String[] args) throws Exception< String javaHome=System.getProperty("java.home"); Path jdkCACertPath=Paths.get(javaHome, "lib", "security", "cacerts"); TrustManagerFactory trustManagerFactory=TrustManagerFactory .getInstance(TrustManagerFactory .getDefaultAlgorithm()); FileInputStream fis=new FileInputStream(jdkCACertPath.toFile()); String keystorePassword="changeit"; KeyStore keyStore=KeyStore.getInstance(KeyStore.getDefaultType()); keyStore.load(fis, keystorePassword.toCharArray()); fis.close(); trustManagerFactory.init(keyStore); TrustManager[] truestManagers=trustManagerFactory.getTrustManagers(); for(TrustManager t:truestManagers) for(X509Certificate c:((X509TrustManager)t).getAcceptedIssuers()) System.out.println(c.getIssuerX500Principal()); >//main closing >//class closing 

How to use certificates from a java PKCS#12 keystore, WebJava has build-in support for work with PKCS#12 keystores, work with this containers doesn’t much differ than standart JKS keystore. For example, …

Accessing keystore certificates in Java

I am developing a Java applet for singing PDF documents in the web browser. The applet needs to be able to work with both Windows and Mac OS. The applet will display a list of installed certificates on user’s computer and let the user select one of them for signing.

I have found examples how to read certificates from a windows keystore using the «Windows-MY» identifier, but I cannot find any example working with certificates in Java for Mac OS. How can a list of certificates be read from keystore on a Mac?

I am new to java programming (being a .NET web developer primarily), maybe I miss something. Thank you for any help.

This is documented here: Java Cryptography Architecture Oracle Providers Documentation for JDK 8

You should read the whole page, but the relevant part for your question is at the bottom:

The Apple provider implements a java.security.KeyStore that provides access to the Mac OS X Keychain. The following algorithms are available in the Apple provider:

Engine: KeyStore
Algorithm Name(s): KeychainStore

So, in other words: You obtain a KeyStore object for the Mac OS X keychain by using the name » KeychainStore «:

KeyStore ks = KeyStore.getInstance("KeychainStore"); 

After that it’s basically the same as for every other keystore type. For example to list all certificates and their aliases:

ks.load(null, null); Enumeration en = ks.aliases(); while (en.hasMoreElements())

BTW, the browser vendors and Oracle are phasing out the browser plugin for applets. Java Web Start might be an alternative.

KeyStore getCertificateChain() method in Java with, Web2020/06/10· To check this code, create a Keystore ‘privatekey’ on your system and set your own keystore password to access that keystore. …

Copying all the certificates from keystore to a temp directory explicitly

I have one certificates installed in java and I can execute this command under the JRE security director:

 keytool -list -keystore cacerts 

That gives me the list of installed certificates, now what i am trying is that all the certificates that are listed under this command to be copied in a folder named temp and this temp folder i have created under in unix at the following

so please advise how can i opy all the certifactes from keystore to a folder named temp

If you’re trying to dump the output to file the following command will work:

keytool -list -keystore cacerts >> /opt/app/temp/

keytool -list -v -keystore cacerts >> /opt/app/temp/

Java — loading a certificate from keystore, Web2011/08/21· 3 Answers. To read the certificate is really trivial. CertificateFactory factory = CertificateFactory.getInstance («X.509»); …

How to retrieve certificate from personal my store

I want to retrieve certificate with password from personal my store by java programming. I found some code of retrieving certificate but it shows all certificates. These certificates shown data didn’t need to open with these related password. I do not want to these style of showing certificate. I want to write the code format type is- choose certificate I want and I add password of this certificate on the browser and then show of this certificate information.

 KeyStore ks = KeyStore.getInstance("Windows-MY"); ks.load(null, null) ; Enumeration en = ks.aliases() ; while (en.hasMoreElements()) < String aliasKey = (String)en.nextElement() ; Certificate c = ks.getCertificate(aliasKey) ; System.out.println("--->alias : " + aliasKey) ; if (ks.isKeyEntry(aliasKey)) < Certificate[] chain = ks.getCertificateChain(aliasKey); System.out.println("--->chain length: " + chain.length); X509Certificate Cert = null; for (Certificate cert: chain) < System.out.println(cert); >> > 

How to repair this code? And I found some C# code for accessing certificate. I wanna also use just like this by java program. How to convert the following C# code to java code?

X509Store store = new X509Store(StoreName.Root, StoreLocation.LocalMachine); store.Open(OpenFlags.ReadOnly); X509Certificate2Collection col = store.Certificates.Find(X509FindType.FindBySerialNumber, "", true); //service is the webservice that need to //be authenticated using X509 certificate TestWebService service = new TestWebService(); //Note, we should find the certificate from the the //root certificate store on local machine if the //certificate is imported correctly and the serial //number is correct if (col.Count == 1) < //all we need to do is to add the certificate //after that we can use the webservice as usual service.ClientCertificates.Add(col[0]); service.Test(); >

The password is not certificate specific. The password is for the keyestore. Its similar to the database where in the password is for a schema and not individual tables.

To answer other question of retrieving on a single certificate, for that you would need to know the alias beforehand and use that alias to retrieve the certificate.

in your code it would be ks.getCertifcate(«alias»)

Get certificate by alias in keystore with multiple entries, Web1 Answer. Basically what you want is Mutual or 2 way SSL. Read these for more information — here and here. In short — the SSL communication works …

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Получить список доверенных сертификатов в Java

В этом кратком руководстве мы научимся читать список доверенных сертификатов в Java на быстрых и практических примерах.

2. Загрузка хранилища ключей ​

Java хранит доверенные сертификаты в специальном файле с именем cacerts , который находится в папке установки Java.

Давайте начнем с чтения этого файла и загрузки его в KeyStore :

 private KeyStore loadKeyStore()    String relativeCacertsPath = "/lib/security/cacerts".replace("/", File.separator);   String filename = System.getProperty("java.home") + relativeCacertsPath;   FileInputStream is = new FileInputStream(filename);    KeyStore keystore = KeyStore.getInstance(KeyStore.getDefaultType());   String password = "changeit";   keystore.load(is, password.toCharArray());    return keystore;   > 

Пароль по умолчанию для этого хранилища ключей — «changeit» , но он может быть другим, если он ранее был изменен в нашей системе.

После загрузки в KeyStore будут храниться наши доверенные сертификаты, а затем мы увидим, как их читать.

3. Чтение сертификатов из указанного хранилища ключей ​

Мы собираемся использовать класс PKIXParameters , который принимает KeyStore в качестве параметра конструктора:

 @Test   public void whenLoadingCacertsKeyStore_thenCertificatesArePresent()    KeyStore keyStore = loadKeyStore();   PKIXParameters params = new PKIXParameters(keyStore);    SetTrustAnchor> trustAnchors = params.getTrustAnchors();   ListCertificate> certificates = trustAnchors.stream()   .map(TrustAnchor::getTrustedCert)   .collect(Collectors.toList());    assertFalse(certificates.isEmpty());   > 

Класс PKIXParameters обычно используется для проверки сертификата, но в нашем примере мы просто использовали его для получения сертификатов из нашего хранилища ключей .

При создании экземпляра PKIXParametrs он создает список TrustAnchor , который будет содержать доверенные сертификаты, присутствующие в нашем KeyStore .

Экземпляр TrustAnchor просто представляет доверенный сертификат.

4. Чтение сертификатов из хранилища ключей по умолчанию ​

Мы также можем получить список доверенных сертификатов, присутствующих в нашей системе, используя класс TrustManagerFactory и инициализировав его без KeyStore , который будет использовать KeyStore по умолчанию .

Если мы не предоставим KeyStore явно, по умолчанию будет использоваться то же самое из предыдущей главы:

 @Test   public void whenLoadingDefaultKeyStore_thenCertificatesArePresent()    TrustManagerFactory trustManagerFactory = TrustManagerFactory.getInstance(TrustManagerFactory.getDefaultAlgorithm());   trustManagerFactory.init((KeyStore) null);    ListTrustManager> trustManagers = Arrays.asList(trustManagerFactory.getTrustManagers());   ListX509Certificate> certificates = trustManagers.stream()   .filter(X509TrustManager.class::isInstance)   .map(X509TrustManager.class::cast)   .map(trustManager -> Arrays.asList(trustManager.getAcceptedIssuers()))   .flatMap(Collection::stream)   .collect(Collectors.toList());    assertFalse(certificates.isEmpty());   > 

В приведенном выше примере мы использовали X509TrustManager , специализированный TrustManager, используемый для аутентификации удаленной части SSL-соединения .

Обратите внимание, что такое поведение может зависеть от конкретной реализации JDK, поскольку спецификация не определяет, что должно произойти, если параметр init() KeyStore имеет значение null .

5. Псевдонимы сертификатов​

Псевдоним сертификата — это просто строка , которая однозначно идентифицирует сертификат.

Среди сертификатов по умолчанию, импортированных Java, есть также известный сертификат, выпущенный GoDaddy, общедоступным регистратором интернет-доменов, который мы будем использовать в наших тестах:

 String GODADDY_CA_ALIAS = "godaddyrootg2ca [jdk]"; 

Давайте посмотрим, как мы можем прочитать все псевдонимы сертификатов, присутствующие в нашем KeyStore :

 @Test   public void whenLoadingKeyStore_thenGoDaddyCALabelIsPresent()    KeyStore keyStore = loadKeyStore();    EnumerationString> aliasEnumeration = keyStore.aliases();   ListString> aliases = Collections.list(aliasEnumeration);   assertTrue(aliases.contains(GODADDY_CA_ALIAS));   > 

В следующем примере мы увидим, как мы можем получить сертификат по его псевдониму:

 @Test   public void whenLoadingKeyStore_thenGoDaddyCertificateIsPresent()    KeyStore keyStore = loadKeyStore();    Certificate goDaddyCertificate = keyStore.getCertificate(GODADDY_CA_ALIAS);   assertNotNull(goDaddyCertificate);   > 

6. Заключение​

В этой быстрой статье мы рассмотрели различные способы перечисления доверенных сертификатов в Java на быстрых и практических примерах.

Как всегда, фрагменты кода можно найти на GitHub .

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