frostfs-node/pkg/services/object/ape/checker.go
Airat Arifullin c8baf76fae [#872] object: Introduce APE middlewar for object service
Signed-off-by: Airat Arifullin <a.arifullin@yadro.com>
2024-01-12 18:41:35 +03:00

82 lines
2.2 KiB
Go

package ape
import (
"context"
"fmt"
objectV2 "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/object"
apistatus "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/client/status"
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 apeErr(prm.Method, status)
}
const accessDeniedAPEReasonFmt = "access to operation %s is denied by access policy engine: %s"
func apeErr(op string, status apechain.Status) error {
errAccessDenied := &apistatus.ObjectAccessDenied{}
errAccessDenied.WriteReason(fmt.Sprintf(accessDeniedAPEReasonFmt, op, status.String()))
return errAccessDenied
}