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permission.go
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permission.go
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package service
import (
"context"
"fmt"
"github.com/go-kratos/kratos/v2/errors"
api2 "github.com/go-saas/kit/pkg/api"
"github.com/go-saas/kit/pkg/authz/authz"
"github.com/go-saas/kit/user/api"
pb "github.com/go-saas/kit/user/api/permission/v1"
"github.com/go-saas/kit/user/util"
"github.com/go-saas/saas"
"github.com/samber/lo"
)
type PermissionService struct {
pb.UnimplementedPermissionServiceServer
auth authz.Service
permissionMgr authz.PermissionManagementService
sr authz.SubjectResolver
trust api2.TrustedContextValidator
}
func NewPermissionService(auth authz.Service, permissionMgr authz.PermissionManagementService, sr authz.SubjectResolver, trust api2.TrustedContextValidator) *PermissionService {
return &PermissionService{auth: auth, permissionMgr: permissionMgr, sr: sr, trust: trust}
}
func (s *PermissionService) GetCurrent(ctx context.Context, req *pb.GetCurrentPermissionRequest) (*pb.GetCurrentPermissionReply, error) {
subjects, err := s.sr.ResolveFromContext(ctx)
if err != nil {
return nil, err
}
newSubjects, err := s.sr.ResolveProcessed(ctx, subjects...)
if err != nil {
return nil, err
}
beans, err := s.permissionMgr.ListAcl(ctx, newSubjects...)
if err != nil {
return nil, err
}
acl := lo.Map(beans, func(bean authz.PermissionBean, _ int) *pb.Permission {
t := &pb.Permission{}
util.MapPermissionBeanToPb(bean, t)
return t
})
return &pb.GetCurrentPermissionReply{Acl: acl}, nil
}
func (s *PermissionService) CheckCurrent(ctx context.Context, req *pb.CheckPermissionRequest) (*pb.CheckPermissionReply, error) {
grant, err := s.auth.Check(ctx, authz.NewEntityResource(req.Namespace, req.Resource), authz.ActionStr(req.Action))
if err != nil {
return nil, err
}
effect := pb.Effect_FORBIDDEN
if grant.Allowed {
effect = pb.Effect_GRANT
}
return &pb.CheckPermissionReply{Effect: effect}, nil
}
//CheckForSubjects internal api for remote permission checker
func (s *PermissionService) CheckForSubjects(ctx context.Context, req *pb.CheckSubjectsPermissionRequest) (*pb.CheckSubjectsPermissionReply, error) {
//if _, err := s.auth.Check(ctx, authz.NewEntityResource(api.ResourcePermissionInternal, "*"), authz.AnyAction); err != nil {
// return nil, err
//}
if ok, _ := s.trust.Trusted(ctx); !ok {
return nil, errors.Forbidden("", "")
}
subjects := make([]authz.Subject, len(req.Subjects))
for i, subject := range req.Subjects {
subjects[i] = authz.SubjectStr(subject)
}
grantList, err := s.auth.BatchCheckForSubjects(ctx, lo.Map(req.Requirements, func(t *pb.PermissionRequirement, _ int) *authz.Requirement {
return authz.NewRequirement(authz.NewEntityResource(t.Namespace, t.Resource), authz.ActionStr(t.Action))
}), subjects...)
if err != nil {
//other error
return nil, err
}
effList := lo.Map(grantList, func(t *authz.Result, _ int) pb.Effect {
effect := pb.Effect_FORBIDDEN
if t.Allowed {
effect = pb.Effect_GRANT
}
return effect
})
return &pb.CheckSubjectsPermissionReply{EffectList: effList}, err
}
func (s *PermissionService) AddSubjectPermission(ctx context.Context, req *pb.AddSubjectPermissionRequest) (*pb.AddSubjectPermissionResponse, error) {
if _, err := s.auth.Check(ctx, authz.NewEntityResource(api.ResourcePermission, req.Subject), authz.WriteAction); err != nil {
return nil, err
}
if err := s.findAnyValidateModifyPermissionDef(ctx, req.Namespace, req.Action); err != nil {
return nil, err
}
if err := s.permissionMgr.AddGrant(ctx, authz.NewEntityResource(req.Namespace, req.Resource),
authz.ActionStr(req.Action), authz.SubjectStr(req.Subject), req.TenantId, util.MapPbEffect2AuthEffect(req.Effect)); err != nil {
return nil, err
}
return &pb.AddSubjectPermissionResponse{}, nil
}
func (s *PermissionService) ListSubjectPermission(ctx context.Context, req *pb.ListSubjectPermissionRequest) (*pb.ListSubjectPermissionResponse, error) {
if _, err := s.auth.Check(ctx, authz.NewEntityResource(api.ResourcePermission, "*"), authz.ReadAction); err != nil {
return nil, err
}
subs := make([]authz.Subject, len(req.Subjects))
for i, subject := range req.Subjects {
subs[i] = authz.SubjectStr(subject)
}
acl, err := s.permissionMgr.ListAcl(ctx, subs...)
if err != nil {
return nil, err
}
resItems := make([]*pb.Permission, len(acl))
for i, bean := range acl {
r := &pb.Permission{}
util.MapPermissionBeanToPb(bean, r)
resItems[i] = r
}
res := &pb.ListSubjectPermissionResponse{
Acl: resItems,
}
ti, _ := saas.FromCurrentTenant(ctx)
var groups []*pb.PermissionDefGroup
authz.WalkGroups(len(ti.GetId()) == 0, true, func(group *authz.PermissionDefGroup) {
g := &pb.PermissionDefGroup{}
mapGroupDef2Pb(group, g)
groups = append(groups, g)
var defs []*pb.PermissionDef
group.Walk(len(ti.GetId()) == 0, true, func(def *authz.PermissionDef) {
d := &pb.PermissionDef{}
mapDef2Pb(def, d)
defs = append(defs, d)
})
g.Def = defs
})
res.DefGroups = groups
return res, nil
}
func (s *PermissionService) UpdateSubjectPermission(ctx context.Context, req *pb.UpdateSubjectPermissionRequest) (*pb.UpdateSubjectPermissionResponse, error) {
//check update permission
if _, err := s.auth.Check(ctx, authz.NewEntityResource(api.ResourcePermission, req.Subject), authz.WriteAction); err != nil {
return nil, err
}
var acl []authz.UpdateSubjectPermission
for _, a := range req.Acl {
if err := s.findAnyValidateModifyPermissionDef(ctx, a.Namespace, a.Action); err != nil {
return nil, err
}
effect := util.MapPbEffect2AuthEffect(a.Effect)
acl = append(acl, authz.UpdateSubjectPermission{
Resource: authz.NewEntityResource(a.Namespace, a.Resource),
Action: authz.ActionStr(a.Action),
TenantID: a.TenantId,
Effect: effect,
})
}
if err := s.permissionMgr.UpdateGrant(ctx, authz.SubjectStr(req.Subject), acl); err != nil {
return nil, err
}
return &pb.UpdateSubjectPermissionResponse{}, nil
}
func (s *PermissionService) RemoveSubjectPermission(ctx context.Context, req *pb.RemoveSubjectPermissionRequest) (*pb.RemoveSubjectPermissionReply, error) {
//check delete permission
if _, err := s.auth.Check(ctx, authz.NewEntityResource(api.ResourcePermission, req.Subject), authz.WriteAction); err != nil {
return nil, err
}
effList := make([]authz.Effect, len(req.Effects))
for i, effect := range req.Effects {
effList[i] = util.MapPbEffect2AuthEffect(effect)
}
var opts []authz.FilterFunc
opts = append(opts, authz.WithEffectsFilter(effList...))
if req.Action != nil {
opts = append(opts, authz.WithActionFilter(authz.ActionStr(*req.Action)))
}
if req.Resource != nil && req.Namespace != nil {
opts = append(opts, authz.WithResourceFilter(authz.NewEntityResource(*req.Namespace, *req.Resource)))
}
if req.TenantId != nil {
opts = append(opts, authz.WithTenantFilter(*req.TenantId))
}
if err := s.permissionMgr.RemoveGrant(ctx, authz.SubjectStr(req.Subject), opts...); err != nil {
return nil, err
}
return &pb.RemoveSubjectPermissionReply{}, nil
}
func (s *PermissionService) findAnyValidateModifyPermissionDef(ctx context.Context, namespace string, action string) error {
//find def
def, err := authz.FindDef(namespace, authz.ActionStr(action), true)
if err != nil {
return err
}
ti, _ := saas.FromCurrentTenant(ctx)
if (def.Side == authz.PermissionAllowSide_HOST_ONLY && len(ti.GetId()) != 0) || (def.Side == authz.PermissionAllowSide_TENANT_ONLY && len(ti.GetId()) == 0) {
return errors.New(400, authz.DefNotFoundReason, fmt.Sprintf("action %s in %s side mismatch", action, namespace))
}
return nil
}
func mapGroupDef2Pb(a *authz.PermissionDefGroup, b *pb.PermissionDefGroup) {
b.DisplayName = a.Name
b.Side = mapSide2Pb(a.Side)
b.Priority = a.Priority
b.Extra = a.Extra
}
func mapDef2Pb(a *authz.PermissionDef, b *pb.PermissionDef) {
b.DisplayName = a.Name
b.Side = mapSide2Pb(a.Side)
b.Extra = a.Extra
b.Namespace = a.Namespace
b.Action = a.Action
}
func mapSide2Pb(side authz.PermissionAllowSide) pb.PermissionSide {
switch side {
case authz.PermissionAllowSide_HOST_ONLY:
return pb.PermissionSide_HOST_ONLY
case authz.PermissionAllowSide_TENANT_ONLY:
return pb.PermissionSide_TENANT_ONLY
default:
return pb.PermissionSide_BOTH
}
}