Working with base64 encoded java key stores and x509 certificates

Some helpful commands for working with base64 encoded java key stores and x509 certificates.

Requires keytool and base64 to be installed.

• base64 is usually installed by default on most mac and linux systems.
• keytool is usually installed as part of the java development kit (JDK).

# Convert a base64 encoded string representing a java key store to a .jks file
echo paste_base64_string_here | base64 --decode > output.jks

# Or grab the base64 string from a file
base64 --decode input.jks > output.jks

#Import a PEM encoded x509 certificate into a java key store
keytool -import -alias insert_cert_alias_here -file insert_cer_file_path_here -storetype JKS -keystore output.jks

# Convert the java key store back to a base64 encoded string
base64 -i output.jks -o keystore.base64