====== Java Keytool ======

==== Java Keytool Commands for Creating and Importing ====


These commands allow you to generate a new Java Keytool keystore file, create a CSR, and import certificates. Any root or intermediate certificates will need to be imported before importing the primary certificate for your domain.

Generate a Java keystore and key pair
<code java>
keytool -genkey -alias mydomain -keyalg RSA -keystore keystore.jks -keysize 2048
</code>

Generate a certificate signing request (CSR) for an existing Java keystore
<code java>
keytool -certreq -alias mydomain -keystore keystore.jks -file mydomain.csr
</code>

Import a root or intermediate CA certificate to an existing Java keystore
<code java>
keytool -import -trustcacerts -alias root -file Thawte.crt -keystore keystore.jks
</code>

Import a signed primary certificate to an existing Java keystore
<code java>
keytool -import -trustcacerts -alias mydomain -file mydomain.crt -keystore keystore.jks
</code>

Generate a keystore and self-signed certificate (see How to Create a Self Signed Certificate using Java Keytool for more info)
<code java>
keytool -genkey -keyalg RSA -alias selfsigned -keystore keystore.jks -storepass password -validity 360 -keysize 2048
</code>

==== Java Keytool Commands for Checking ====


If you need to check the information within a certificate, or Java keystore, use these commands.

Check a stand-alone certificate
<code java>
keytool -printcert -v -file mydomain.crt
</code>

Check which certificates are in a Java keystore
<code java>
keytool -list -v -keystore keystore.jks
</code>

Check a particular keystore entry using an alias
<code java>
keytool -list -v -keystore keystore.jks -alias mydomain
</code>

==== Other Java Keytool Commands ====


Delete a certificate from a Java Keytool keystore
<code java>
keytool -delete -alias mydomain -keystore keystore.jks
</code>

Change a Java keystore password
<code java>
keytool -storepasswd -new new_storepass -keystore keystore.jks
</code>

Export a certificate from a keystore
<code java>
keytool -export -alias mydomain -file mydomain.crt -keystore keystore.jks
</code>

List Trusted CA Certs
<code java>
keytool -list -v -keystore $JAVA_HOME/jre/lib/security/cacerts
</code>

Import New CA into Trusted Certs
<code java>
keytool -import -trustcacerts -file /path/to/ca/ca.pem -alias CA_ALIAS -keystore $JAVA_HOME/jre/lib/security/cacerts
</code>