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PGP

The pgp sub-commands are low-level commands, exposing the PGP capabilities of Scala CLI. These capabilities are used in the publish and publish setup commands in particular.

These commands make it possible to

  • create PGP keys with pgp create
  • get a key fingerprint with pgp key-id
  • push them to / pull them from key servers with pgp push / pgp pull
  • sign files with pgp sign
  • verify signatures with pgp verify

These capabilities rely on the Bouncy Castle library. Note that sub-commands relying on signing, such as publish, also allow signing to be handled using gpg.

Create key pairs​

$ scala-cli pgp create --email alex@alex.me --password env:MY_PASSWORD
Wrote public key e259e7e8a23475b3 to key.pub
Wrote secret key to key.skr

See the dedicated page for the various formats accepted by the --password option.

Get the fingerprint of a public key​

$ scala-cli pgp key-id ./key.pub
e259e7e8a23475b3

Push public keys to key servers​

$ scala-cli pgp push key.pub
Key 0xe259e7e8a23475b3 uploaded to http://keyserver.ubuntu.com:11371

Pull public keys from key servers​

$ scala-cli pgp pull 0x914d298df8fa4d20
-----BEGIN PGP PUBLIC KEY BLOCK-----
…
-----END PGP PUBLIC KEY BLOCK-----

Sign files​

$ scala-cli pgp sign --secret-key file:./key.skr --password value:1234 ./foo
$ cat ./foo.asc
-----BEGIN PGP MESSAGE-----
…
-----END PGP MESSAGE-----

$ scala-cli pgp sign --secret-key file:./key.skr --password value:1234 ./foo --stdout
-----BEGIN PGP MESSAGE-----
…
-----END PGP MESSAGE-----

Verify signatures​

$ scala-cli pgp verify --key key.pub foo.asc
foo.asc: valid signature