Commit Graph

8 Commits

Author SHA1 Message Date
Adnan Maolood
e701ceff71 Add KnownHosts.Hosts function 2021-01-14 18:50:03 -05:00
Adnan Maolood
3fd55c5cee tofu: Add KnownHosts.Load function 2021-01-14 17:09:31 -05:00
Adnan Maolood
6f11910dff tofu: Add NewHostsFile function 2021-01-14 16:54:38 -05:00
Adnan Maolood
da3e9ac0fe tofu: Protect HostWriter with a mutex 2021-01-14 16:35:54 -05:00
Adnan Maolood
9fe837ffac tofu: Refactor known hosts
This commit introduces the KnownHosts struct, whose purpose is simply to
store known hosts entries. The HostWriter struct is now in charge of
appending hosts to files, and the two are not dependent on each other.
Users are now responsible for opening the known hosts file and closing
it when they are finished with it.
2021-01-14 16:26:43 -05:00
Adnan Maolood
4b8bb16a3d tofu: Rename KnownHost to Host 2021-01-14 14:15:08 -05:00
Hugo Wetterberg
95aff9c573 tofu: Refactor
This commit changes underlying file handling and known hosts parsing.

A known hosts file opened through Load() never closed the underlying
file. During known hosts parsing most errors were unchecked, or just
led to the line being skipped.

I removed the KnownHosts type, which didn't really have a role after
the refactor. The embedding of KnownHosts in KnownHosts file has been
removed as it also leaked the map unprotected by the mutex.

The Fingerprint type is now KnownHost and has taken over the
responsibility of marshalling and unmarshalling.

SetOutput now takes a WriteCloser so that we can close the underlying
writer when it's replaced, or when it's explicitly closed through the
new Close() function.

KnownHostsFile.Add() now also writes the known host to the output if
set. I think that makes sense expectation-wise for the type.

Turned WriteAll() into WriteTo() to conform with the io.WriterTo
interface.

Load() is now Open() to better reflect the fact that a file is opened,
and kept open. It can now also return errors from the parsing process.

The parser does a lot more error checking, and this might be an area
where I've changed a desired behaviour as invalid entries no longer
are ignored, but aborts the parsing process. That could be changed to
a warning, or some kind of parsing feedback.

I added KnownHostsFile.TOFU() to fill the developer experience gap
that was left after the client no longer knows about
KnownHostsFile. It implements a basic non-interactive TOFU flow.
2021-01-14 13:48:57 -05:00
Adnan Maolood
d78052ce08 Move tofu.go to a subpackage 2021-01-10 16:46:12 -05:00