frostfs-node/pkg/services/object/ape/checker.go
Airat Arifullin f2f3294fc3 [#919] ape: Improve error messages in ape service
* Wrap all APE middleware errors in apeErr that
  makes errors more explicit with status AccessDenied.
* Use denyingRuleErr for denying status from chain router.

Signed-off-by: Airat Arifullin <a.arifullin@yadro.com>
2024-01-23 08:11:24 +00:00

73 lines
1.8 KiB
Go

package ape
import (
"context"
"fmt"
objectV2 "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/object"
cid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id"
oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
apechain "git.frostfs.info/TrueCloudLab/policy-engine/pkg/chain"
policyengine "git.frostfs.info/TrueCloudLab/policy-engine/pkg/engine"
)
type checkerImpl struct {
chainRouter policyengine.ChainRouter
headerProvider HeaderProvider
}
func NewChecker(chainRouter policyengine.ChainRouter, headerProvider HeaderProvider) Checker {
return &checkerImpl{
chainRouter: chainRouter,
headerProvider: headerProvider,
}
}
type Prm struct {
Namespace string
Container cid.ID
// Object ID is omitted for some methods.
Object *oid.ID
// If Header is set, then object attributes and properties will be parsed from
// a request/response's header.
Header *objectV2.Header
// Method must be represented only as a constant represented in native schema.
Method string
// Role must be representedonly as a constant represented in native schema.
Role string
// An encoded sender's public key string.
SenderKey string
}
var (
errMissingOID = fmt.Errorf("object ID is not set")
)
// CheckAPE checks if a request or a response is permitted creating an ape request and passing
// it to chain router.
func (c *checkerImpl) CheckAPE(ctx context.Context, prm Prm) error {
r, err := c.newAPERequest(ctx, prm)
if err != nil {
return fmt.Errorf("failed to create ape request: %w", err)
}
status, ruleFound, err := c.chainRouter.IsAllowed(apechain.Ingress,
policyengine.NewRequestTarget(prm.Namespace, prm.Container.EncodeToString()), r)
if err != nil {
return err
}
if !ruleFound || status == apechain.Allow {
return nil
}
return fmt.Errorf("found denying rule for %s: %s", prm.Method, status)
}