865d513e35
* 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>
73 lines
1.4 KiB
Go
73 lines
1.4 KiB
Go
package config
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import (
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"encoding/json"
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"errors"
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"testing"
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)
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func TestExpressionOrListUnmarshal(t *testing.T) {
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for _, tt := range []struct {
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name string
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inp string
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err error
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validErr error
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result *ExpressionOrList
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}{
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{
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name: "simple",
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inp: `"\"User-Agent\" in headers"`,
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result: &ExpressionOrList{
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Expression: `"User-Agent" in headers`,
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},
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},
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{
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name: "object-and",
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inp: `{
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"all": ["\"User-Agent\" in headers"]
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}`,
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result: &ExpressionOrList{
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All: []string{
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`"User-Agent" in headers`,
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},
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},
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},
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{
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name: "object-or",
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inp: `{
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"any": ["\"User-Agent\" in headers"]
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}`,
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result: &ExpressionOrList{
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Any: []string{
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`"User-Agent" in headers`,
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},
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},
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},
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{
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name: "both-or-and",
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inp: `{
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"all": ["\"User-Agent\" in headers"],
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"any": ["\"User-Agent\" in headers"]
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}`,
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validErr: ErrExpressionCantHaveBoth,
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},
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} {
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t.Run(tt.name, func(t *testing.T) {
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var eol ExpressionOrList
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if err := json.Unmarshal([]byte(tt.inp), &eol); !errors.Is(err, tt.err) {
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t.Errorf("wanted unmarshal error: %v but got: %v", tt.err, err)
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}
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if tt.result != nil && !eol.Equal(tt.result) {
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t.Logf("wanted: %#v", tt.result)
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t.Logf("got: %#v", &eol)
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t.Fatal("parsed expression is not what was expected")
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}
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if err := eol.Valid(); !errors.Is(err, tt.validErr) {
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t.Errorf("wanted validation error: %v but got: %v", tt.err, err)
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}
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})
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}
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}
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