I am writing a bash script which generates unattended GPG keys, I have looked through Unattended Usage of GPG and was surprised to find that 'Currently only one subkey can be handled.'
I am unable to find if there is a way to modify a GPG key to add a second subkey using the unattended generation functions available, or if I'll have to add the subkey manually myself.
I have attempted to use
here strings and creating a file with one input per line as well as using
printf similar to below:
printf 'addkey' | gpg2 --edit-key 'firstname.lastname@example.org'
With none of these solutions working:
balthasar@magi:~$ printf 'addkey' | gpg2 --edit-key 'email@example.com' printf 'addkey' | gpg2 --edit-key 'firstname.lastname@example.org' gpg (GnuPG) 2.0.26; Copyright (C) 2013 Free Software Foundation, Inc. This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Secret key is available. pub 4096R/AB96CED4 created: 2016-12-02 expires: 2017-09-02 usage: SC trust: ultimate validity: ultimate sub 2048R/71804CF2 created: 2016-12-02 expires: 2017-09-02 usage: E [ultimate] (1). test3 <email@example.com> gpg>
My GPG Key File
Key-Type: RSA Key-Length: 4096 Key-Usage: sign Subkey-Type: RSA Subkey-Length: 2048 Subkey-Usage: encrypt Name-Real: Foo Bar Name-Email: firstname.lastname@example.org Expire-Date: 2017-09-02 %ask-passphrase %commit
UPDATE: 4, December 2016
I have passed the first hurdle of getting some input to GPG by using the following snippet:
~$ stty -echo; gpg2 --edit-key <keyname> "addkey"
However I am unable to 'pipe' input after running the