When implementing SSL with Oracle technologies such as OHS an Oracle Wallet is required. The Oracle Wallet is Oracle's proprietary keystore for holding identity and trust SSL keys. Often though, a company will provide the Java Keystore (jks) format. Here is a trick to convert the JKS into an Oracle Wallet via the command line using the orapki command from an Oracle Client installation.
# create a new wallet. If C:\wallet_temp already exists, remove it first.
orapki wallet create -wallet c:\wallet_temp -auto_login_local
orapki wallet create -wallet c:\wallet_temp\ewallet.p12 -auto_login
# Remove all the default trusts from new wallet for a truly empty wallet
orapki wallet remove -wallet c:\wallet_temp\ewallet.p12 -trusted_cert_all
# using an existing jks file, import all contents into the new wallet
orapki wallet jks_to_pkcs12 -wallet c:\wallet_temp\ewallet.p12 -keystore c:\wallet_temp\my_java_keystore.jks -jkspwd "my_java_keystore_password"