Signed-off-by: Asra Ali <asraa@google.com>

Signed-off-by: Asra Ali <asraa@google.com>

* update boilerplate header and apply go fmt

Signed-off-by: Carlos Panato <ctadeu@gmail.com>

* lints: fix golangci-lint issues

Signed-off-by: Carlos Panato <ctadeu@gmail.com>

* updated based on feedback

Signed-off-by: Carlos Panato <ctadeu@gmail.com>

The error was turning signature bytes into a string directly. We could
base64 encode it, but that's not terribly useful either.

Signed-off-by: Dan Lorenc <dlorenc@google.com>

Signed-off-by: Dan Lorenc <dlorenc@google.com>

saves second pass over data

Still need to add some more e2e-style tests that go through the ArtifactFactory flow.