RSA public/private keys in YAML

You can store your keys as text (“ASCII-armored” / base 64 encoded). From Wikipedia, the syntax for multiline strings in YAML is:

- title: An example multi-line string in YAML
  body : |
    This is a multi-line string.
    "special" metacharacters may
    appear here. The extent of this string is
    indicated by indentation.