Follow these steps to import each certificate into the other's
trust store.
- 
On the client, import the server certificate into the client's trust
store:
 keytool -import -alias favoriteServerCertificate \
-file ServerCertificate -keystore ~/vault/ClientTrustStore \
-storepass secretClientTrustStorePassword 
- 
On the server, import the client certificate into the server's trust
store:
 keytool -import -alias Client_1_Certificate \
-file ClientCertificate -keystore ~/vault/ServerTrustStore \
-storepass secretServerTrustStorePassword