/
authzed.go
82 lines (67 loc) · 2.54 KB
/
authzed.go
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package authorization
import (
gocontext "context"
"fmt"
"github.com/kuadrant/authorino/pkg/auth"
"github.com/kuadrant/authorino/pkg/json"
"google.golang.org/grpc"
insecuregrpc "google.golang.org/grpc/credentials/insecure"
authzedpb "github.com/authzed/authzed-go/proto/authzed/api/v1"
authzed "github.com/authzed/authzed-go/v1"
"github.com/authzed/grpcutil"
)
type Authzed struct {
Endpoint string
Insecure bool
SharedSecret string
Subject json.JSONValue
SubjectKind json.JSONValue
Resource json.JSONValue
ResourceKind json.JSONValue
Permission json.JSONValue
}
type permissionResponse struct {
CheckedAt *authzedpb.ZedToken `json:"checked_at,omitempty"`
Permissionship authzedpb.CheckPermissionResponse_Permissionship `json:"permissionship,omitempty"`
}
func (a *Authzed) Call(pipeline auth.AuthPipeline, ctx gocontext.Context) (interface{}, error) {
var dialOpts []grpc.DialOption
if a.Insecure {
dialOpts = append(dialOpts, grpcutil.WithInsecureBearerToken(a.SharedSecret), grpc.WithTransportCredentials(insecuregrpc.NewCredentials()))
} else {
systemCertsOption, _ := grpcutil.WithSystemCerts(grpcutil.VerifyCA)
dialOpts = append(dialOpts, grpcutil.WithBearerToken(a.SharedSecret), systemCertsOption)
}
client, err := authzed.NewClient(a.Endpoint, dialOpts...)
if err != nil {
return nil, err
}
authJSON := pipeline.GetAuthorizationJSON()
resp, err := client.CheckPermission(ctx, &authzedpb.CheckPermissionRequest{
Resource: authzedObjectFor(a.Resource, a.ResourceKind, authJSON),
Subject: &authzedpb.SubjectReference{Object: authzedObjectFor(a.Subject, a.SubjectKind, authJSON)},
Permission: fmt.Sprintf("%s", a.Permission.ResolveFor(authJSON)),
})
if err != nil {
return nil, err
}
if resp.Permissionship != authzedpb.CheckPermissionResponse_PERMISSIONSHIP_HAS_PERMISSION {
var token string
if checkedAt := resp.CheckedAt; checkedAt != nil {
token = fmt.Sprintf(";token=%s", checkedAt.Token)
}
return nil, fmt.Errorf("%s%s", resp.Permissionship, token)
}
// convert to our own PermissionResponse type - hack to avoid the object being stringified in the authorzation JSON
obj := &permissionResponse{
CheckedAt: resp.GetCheckedAt(),
Permissionship: resp.GetPermissionship(),
}
return obj, nil
}
func authzedObjectFor(name, kind json.JSONValue, authJSON string) *authzedpb.ObjectReference {
return &authzedpb.ObjectReference{
ObjectId: fmt.Sprintf("%s", name.ResolveFor(authJSON)),
ObjectType: fmt.Sprintf("%s", kind.ResolveFor(authJSON)),
}
}