Increasing fileKeySize

[W4rH0rse]

If I were to increase fileKeySize in age.go would that break anything (other than compatibility), and would I need to change anything else to get a 256 bit fileKey?

[FiloSottile]

I haven't tested it, but it should probably work. You'll also need to update the expected size of encrypted stanza bodies. It won't work with most plugins.

Note that if you want 256 bits against Grover, you don't need them, see https://words.filippo.io/post-quantum-age/.