Avoid having ssh-agent a hard dependency of `rad-auth`.
Only add the user's key in `auth::init()` to ssh-agent if it is running,
instead of exiting with error.
For `auth::authenticate()` which is used to authenticate the user with
Radicle, assume using `RAD_PASSPHRASE` is a fallback authentication
method. If ssh-agent is not-detected, verify the RAD_PASSPHRASE is
present and correct. Treat neither being present as an error.
Support this by clarifying on `ssh::agent::connect()`s error which are
due to it not being present.
In interactive (user) contexts, use `try_sign` instead of `sign`.
We also revisit the `Profile` by adding a `signer` method that can
fail, eg. if we couldn't connect to ssh-agent.
Finally, we replace `UnsafeSigner` with `MemorySigner`, which makes
use of `ssh::Keystore`.
Signed-off-by: Alexis Sellier <alexis@radicle.xyz>
Armored signatures are used by Git for signing commits. Support reading
writing these signatures by implementing a new trait to read and write
to the SSH formmat.
Signed-off-by: Slack Coder <slackcoder@server.ky>
Slack Coder
Alexis Sellier