Import crt and key to pkcs12 programmatically

http://stackoverflow.com/questions/11410770/java-load-rsa-public-key-from-file

http://stackoverflow.com/questions/17897819/java-keystore-private-key-import

http://stackoverflow.com/questions/3389143/generate-x509certificate-from-byte

http://stackoverflow.com/questions/19353748/how-to-convert-byte-array-to-privatekey-or-publickey-type

https://secinto.wordpress.com/2013/01/04/convert-pkcs12-to-pfx/