When you install JDK or JRE on your machine, Java comes with its own trustStore (collection of the certificate from well known CA like Verisign, goDaddy, thwarte, etc. The trustStore and keyStore in Java 6 and newer releases. ![]() In Java, one file can represent both keyStore and trustStore, but it’s better to separate private and public credentials both for security and maintenance reasons. In Java property is used to specify keystore while is used to specify trustStore. In this case, the client will store its private key and identify certificate on keyStore and server will authenticate the client against certificate stored on the server’s trustStore. Though I omitted this in the last section to reduce confusion you can have both keyStore and trustStore on client and server side if the client also needs to authenticate itself on the server. If your browser connects to any website over SSL, it verifies certificate presented by the server against its trustStore. It is used to store a server’s identity certificate, which servers will present to a client on the connection while trustStore setup on client side must contain the server certificate to make the connection work. Keystore is needed when you are setting up server-side on SSL. Keystore is used to store your credential (server or client) while trustStore is used to store others credential (Certificates from CA). Let’s see the difference between trustStore and keyStore in point format which is much clear and easy to understand: If you are implementing SSL on the server side, you need a KeyStore to store your server certificate and private key.Īnytime a client connects to the server, the server will present its certificate stored in KeyStore and client will verify that certificate by comparing with certificates stored on its trustStore. Many Java programmers don’t pay attention to whether they are implementing the server side of SSL connection or client side of SSL Connection.įor example, setting up SSL for tomcat is server side of SSL while setting up JDBC over SSL is client side of SSL connection. In order to understand the difference between keyStore and trustStore you need to understand how SSL conversation happens between client and server because this is the starting point of confusion. TrustStore stores certificates from the third party, your Java application communicate or certificates signed by CA (certificate authorities like Verisign, Thawte, Geotrust or GoDaddy) which can be used to identify the third party. The keyStore in Java stores private key and certificates corresponding to there public keys and require if you are SSL Server or SSL requires client authentication. In SSL handshake, the purpose of trustStore is to verify credentials and purpose of keyStore is to provide the credential. The only difference between trustStore and keyStore is what they store, and their purpose. TrustStore and keyStore are very much similar in terms of construct and structure as both are managed by keytool command and represented by KeyStore programmatically but they often confuse Java programmers, both beginners and intermediate alike. ![]() The trustStore and keyStore are used in the context of setting up SSL connection in Java application between client and server. The keytool command comes with Java installation and its available in the bin directory of JAVA_HOME. By the way, you can use a keytool command to view certificates from trustStore and keyStore. In this Java tutorial, we will explore both keyStore and trustStore and understand the main differences between them. One reason for this could be SSL setup being a one-time job, and not many programmers get the opportunity to do that. That was a one-liner difference between trustStore and keyStore in Java, but no doubt these two terms are quite confusing not just for anyone who is configuring SSL connection in Java for the first time, but also many intermediate and senior level programmers. ![]() The main difference between trustStore and keyStore is that trustStore (as name suggest) is used to store certificates from trusted Certificate authorities(CA) which are used to verify certificate presented by Server in SSL Connection, while keyStore is used to store private keys and identity certificates which programs should present to other parties (Server or client) to verify its identity.
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