* feat(lib): implement request weight
Replaces #608
This is a big one and will be what makes Anubis a generic web
application firewall. This introduces the WEIGH option, allowing
administrators to have facets of request metadata add or remove
"weight", or the level of suspicion. This really makes Anubis weigh
the soul of requests.
Signed-off-by: Xe Iaso <me@xeiaso.net>
* fix(lib): maintain legacy challenge behavior
Signed-off-by: Xe Iaso <me@xeiaso.net>
* fix(lib): make weight have dedicated checkers for the hashes
Signed-off-by: Xe Iaso <me@xeiaso.net>
* feat(data): convert some rules over to weight points
Signed-off-by: Xe Iaso <me@xeiaso.net>
* docs: document request weight
Signed-off-by: Xe Iaso <me@xeiaso.net>
* fix(CHANGELOG): spelling error
Signed-off-by: Xe Iaso <me@xeiaso.net>
* chore: spelling
Signed-off-by: Xe Iaso <me@xeiaso.net>
* docs: fix links to challenge information
Signed-off-by: Xe Iaso <me@xeiaso.net>
* docs(policies): fix formatting
Signed-off-by: Xe Iaso <me@xeiaso.net>
* fix(config): make default weight adjustment 5
Signed-off-by: Xe Iaso <me@xeiaso.net>
---------
Signed-off-by: Xe Iaso <me@xeiaso.net>
* feat(lib/policy): add support for CEL checkers
This adds the ability for administrators to use Common Expression
Language[0] (CEL) for more advanced check logic than Anubis previously
offered.
These can be as simple as:
```yaml
- name: allow-api-routes
action: ALLOW
expression:
and:
- '!(method == "HEAD" || method == "GET")'
- path.startsWith("/api/")
```
or get as complicated as:
```yaml
- name: allow-git-clients
action: ALLOW
expression:
and:
- userAgent.startsWith("git/") || userAgent.contains("libgit") || userAgent.startsWith("go-git") || userAgent.startsWith("JGit/") || userAgent.startsWith("JGit-")
- >
"Git-Protocol" in headers && headers["Git-Protocol"] == "version=2"
```
Internally these are compiled and evaluated with cel-go[1]. This also
leaves room for extensibility should that be desired in the future. This
will intersect with #338 and eventually intersect with TLS fingerprints
as in #337.
[0]: https://cel.dev/
[1]: https://github.com/google/cel-go
Signed-off-by: Xe Iaso <me@xeiaso.net>
* feat(data/apps): add API route allow rule for non-HEAD/GET
Signed-off-by: Xe Iaso <me@xeiaso.net>
* docs: document expression syntax
Signed-off-by: Xe Iaso <me@xeiaso.net>
* fix: fixes in review
Signed-off-by: Xe Iaso <me@xeiaso.net>
---------
Signed-off-by: Xe Iaso <me@xeiaso.net>
* feat(config): support importing bot policy snippets
This changes the grammar of the Anubis bot policy config to allow
importing from internal shared rules or external rules on the
filesystem.
This lets you create a file at `/data/policies/block-evilbot.yaml` and
then import it with:
```yaml
bots:
- import: /data/policies/block-evilbot.yaml
```
This also explodes the default policy file into a bunch of composable
snippets.
Thank you @Aibrew for your example gitea Atom / RSS feed rules!
Signed-off-by: Xe Iaso <me@xeiaso.net>
* fix(data): update botPolicies.json to use imports
Signed-off-by: Xe Iaso <me@xeiaso.net>
* fix(cmd/anubis): extract bot policies with --extract-resources
This allows a user that doesn't have anything but the Anubis binary to
figure out what the default configuration does.
* docs(data/botPolices.yaml): document import syntax in-line
Signed-off-by: Xe Iaso <me@xeiaso.net>
* fix(lib/policy): better test importing from JSON snippets
Signed-off-by: Xe Iaso <me@xeiaso.net>
* docs(admin): Add import syntax documentation
This documents the import syntax and is based on the block comment at
the top of the default bot policy file.
* docs(changelog): add note about importing snippets
Signed-off-by: Xe Iaso <me@xeiaso.net>
* style(lib/policy/config): use an error value instead of an inline error
Signed-off-by: Xe Iaso <me@xeiaso.net>
---------
Signed-off-by: Xe Iaso <me@xeiaso.net>
* fix: improve error handling for resource closing and JSON encoding in MakeChallenge
* chore: update CHANGELOG with recent changes and improvements
* refactor: simplify RenderIndex function and improve error handling
---------
Signed-off-by: Jason Cameron <git@jasoncameron.dev>
This makes each check into its own type that has encapsulated check
logic, meaning that it's easier to add new checker implementations in
the future.
Signed-off-by: Xe Iaso <me@xeiaso.net>
* Refactor anubis to split business logic into a lib, and cmd to just be direct usage.
* Post-rebase fixes.
* Update changelog, remove unnecessary one.
* lib: refactor this
This is mostly based on my personal preferences for how Go code should
be laid out. I'm not sold on the package name "lib" (I'd call it anubis
but that would stutter), but people are probably gonna import it as
libanubis so it's likely fine.
Packages have been "flattened" to centralize implementation with area of
concern. This goes against the Java-esque style that many people like,
but I think this helps make things simple.
Most notably: the dnsbl client (which is a hack) is an internal package
until it's made more generic. Then it can be made external.
I also fixed the logic such that `go generate` works and rebased on
main.
* internal/test: run tests iff npx exists and DONT_USE_NETWORK is not set
Signed-off-by: Xe Iaso <me@xeiaso.net>
* internal/test: install deps
Signed-off-by: Xe Iaso <me@xeiaso.net>
* .github/workflows: verbose go tests?
Signed-off-by: Xe Iaso <me@xeiaso.net>
* internal/test: sleep 2
Signed-off-by: Xe Iaso <me@xeiaso.net>
* internal/test: nix this test so CI works
Signed-off-by: Xe Iaso <me@xeiaso.net>
* internal/test: warmup per browser?
Signed-off-by: Xe Iaso <me@xeiaso.net>
* internal/test: disable for now :(
Signed-off-by: Xe Iaso <me@xeiaso.net>
* lib/anubis: do not apply bot rules if address check fails
Closes#83
---------
Signed-off-by: Xe Iaso <me@xeiaso.net>
Co-authored-by: Xe Iaso <me@xeiaso.net>
