Create cert/key files with output of CSR/cert generation if they don't exist

[reedloden]

It would be nice if the writing of the .crt and .key files to disk was built-in so it doesn't have to be done manually (as in, I pass in filenames -- if they exist, they are used... if they don't exist, they are written to with the output of the CSR / cert creation).

[reaperhulk]

Do you mean this for the r509 binary or programmatically? Could you give a sketch of what API you'd like to see? In the API right now it works like this:

csr = R509::CSR.new(:type => "ec", :subject => [['CN','test']])
csr.write_pem("/some/path")
csr.key.write_pem("/some/path.key")