Golang api.UserFrom函数代码示例

func (m *VirtualStorage) confirmNoEscalation(ctx kapi.Context, roleBinding *authorizationapi.RoleBinding) error {
	modifyingRole, err := m.getReferencedRole(roleBinding.RoleRef)
	if err != nil {
		return err
	}

	ruleResolver := rulevalidation.NewDefaultRuleResolver(
		m.PolicyRegistry,
		m.BindingRegistry,
		m.ClusterPolicyRegistry,
		m.ClusterPolicyBindingRegistry,
	)
	ownerLocalRules, err := ruleResolver.GetEffectivePolicyRules(ctx)
	if err != nil {
		return err
	}
	masterContext := kapi.WithNamespace(ctx, "")
	ownerGlobalRules, err := ruleResolver.GetEffectivePolicyRules(masterContext)
	if err != nil {
		return err
	}

	ownerRules := make([]authorizationapi.PolicyRule, 0, len(ownerGlobalRules)+len(ownerLocalRules))
	ownerRules = append(ownerRules, ownerLocalRules...)
	ownerRules = append(ownerRules, ownerGlobalRules...)

	ownerRightsCover, missingRights := rulevalidation.Covers(ownerRules, modifyingRole.Rules)
	if !ownerRightsCover {
		user, _ := kapi.UserFrom(ctx)
		return fmt.Errorf("attempt to grant extra privileges: %v\nuser=%v\nownerrules%v\n", missingRights, user, ownerRules)
	}

	return nil
}

func TestAuthenticateRequest(t *testing.T) {
	success := make(chan struct{})
	contextMapper := api.NewRequestContextMapper()
	auth, err := NewRequestAuthenticator(
		contextMapper,
		authenticator.RequestFunc(func(req *http.Request) (user.Info, bool, error) {
			return &user.DefaultInfo{Name: "user"}, true, nil
		}),
		http.HandlerFunc(func(_ http.ResponseWriter, _ *http.Request) {
			t.Errorf("unexpected call to failed")
		}),
		http.HandlerFunc(func(_ http.ResponseWriter, req *http.Request) {
			ctx, ok := contextMapper.Get(req)
			if ctx == nil || !ok {
				t.Errorf("no context stored on contextMapper: %#v", contextMapper)
			}
			user, ok := api.UserFrom(ctx)
			if user == nil || !ok {
				t.Errorf("no user stored in context: %#v", ctx)
			}
			close(success)
		}),
	)

	auth.ServeHTTP(httptest.NewRecorder(), &http.Request{})

	<-success
	empty, err := api.IsEmpty(contextMapper)
	if err != nil {
		t.Fatalf("unexpected error: %v", err)
	}
	if !empty {
		t.Fatalf("contextMapper should have no stored requests: %v", contextMapper)
	}
}

// GetEffectivePolicyRules returns the list of rules that apply to a given user in a given namespace and error.  If an error is returned, the slice of
// PolicyRules may not be complete, but it contains all retrievable rules.  This is done because policy rules are purely additive and policy determinations
// can be made on the basis of those rules that are found.
func (a *DefaultRuleResolver) GetEffectivePolicyRules(ctx kapi.Context) ([]authorizationapi.PolicyRule, error) {
	roleBindings, err := a.GetRoleBindings(ctx)
	if err != nil {
		return nil, err
	}
	user, exists := kapi.UserFrom(ctx)
	if !exists {
		return nil, errors.New("user missing from context")
	}

	errs := []error{}
	rules := make([]authorizationapi.PolicyRule, 0, len(roleBindings))
	for _, roleBinding := range roleBindings {
		if !appliesToUser(roleBinding.Users(), roleBinding.Groups(), user) {
			continue
		}

		role, err := a.GetRole(roleBinding)
		if err != nil {
			errs = append(errs, err)
			continue
		}

		for _, curr := range role.Rules() {
			rules = append(rules, curr)
		}
	}

	return rules, kerrors.NewAggregate(errs)
}

func (r *requestAttributeGetter) GetAttribs(req *http.Request) authorizer.Attributes {
	attribs := authorizer.AttributesRecord{}

	ctx, ok := r.requestContextMapper.Get(req)
	if ok {
		user, ok := api.UserFrom(ctx)
		if ok {
			attribs.User = user
		}
	}

	attribs.ReadOnly = IsReadOnlyReq(*req)

	apiRequestInfo, _ := r.apiRequestInfoResolver.GetAPIRequestInfo(req)

	// If a path follows the conventions of the REST object store, then
	// we can extract the resource.  Otherwise, not.
	attribs.Resource = apiRequestInfo.Resource

	// If the request specifies a namespace, then the namespace is filled in.
	// Assumes there is no empty string namespace.  Unspecified results
	// in empty (does not understand defaulting rules.)
	attribs.Namespace = apiRequestInfo.Namespace

	return &attribs
}

func (r *REST) Create(ctx kapi.Context, obj runtime.Object) (runtime.Object, error) {

	if err := rest.BeforeCreate(projectrequestregistry.Strategy, ctx, obj); err != nil {
		return nil, err
	}

	projectRequest := obj.(*projectapi.ProjectRequest)

	if _, err := r.openshiftClient.Projects().Get(projectRequest.Name); err == nil {
		return nil, kapierror.NewAlreadyExists("project", projectRequest.Name)
	}

	projectName := projectRequest.Name
	projectAdmin := ""
	if userInfo, exists := kapi.UserFrom(ctx); exists {
		projectAdmin = userInfo.GetName()
	}

	template, err := r.getTemplate()
	if err != nil {
		return nil, err
	}

	for i := range template.Parameters {
		switch template.Parameters[i].Name {
		case ProjectAdminUserParam:
			template.Parameters[i].Value = projectAdmin
		case ProjectDescriptionParam:
			template.Parameters[i].Value = projectRequest.Description
		case ProjectDisplayNameParam:
			template.Parameters[i].Value = projectRequest.DisplayName
		case ProjectNameParam:
			template.Parameters[i].Value = projectName
		}
	}

	list, err := r.openshiftClient.TemplateConfigs(kapi.NamespaceDefault).Create(template)
	if err != nil {
		return nil, err
	}
	if err := utilerrors.NewAggregate(runtime.DecodeList(list.Objects, kapi.Scheme)); err != nil {
		return nil, err
	}

	bulk := configcmd.Bulk{
		Mapper: latest.RESTMapper,
		Typer:  kapi.Scheme,
		RESTClientFactory: func(mapping *meta.RESTMapping) (resource.RESTClient, error) {
			return r.openshiftClient, nil
		},
	}
	if err := utilerrors.NewAggregate(bulk.Create(&kapi.List{Items: list.Objects}, projectName)); err != nil {
		return nil, err
	}

	return r.openshiftClient.Projects().Get(projectName)
}

// Validate validates a new image stream.
func (s Strategy) Validate(ctx kapi.Context, obj runtime.Object) fielderrors.ValidationErrorList {
	stream := obj.(*api.ImageStream)
	user, ok := kapi.UserFrom(ctx)
	if !ok {
		return fielderrors.ValidationErrorList{kerrors.NewForbidden("imageStream", stream.Name, fmt.Errorf("unable to update an ImageStream without a user on the context"))}
	}
	errs := s.tagVerifier.Verify(nil, stream, user)
	errs = append(errs, s.tagsChanged(nil, stream)...)
	errs = append(errs, validation.ValidateImageStream(stream)...)
	return errs
}

// List retrieves a list of Projects that match label.
func (s *REST) List(ctx kapi.Context, label labels.Selector, field fields.Selector) (runtime.Object, error) {
	user, ok := kapi.UserFrom(ctx)
	if !ok {
		return nil, kerrors.NewForbidden("Project", "", fmt.Errorf("unable to list projects without a user on the context"))
	}
	namespaceList, err := s.lister.List(user)
	if err != nil {
		return nil, err
	}
	return convertNamespaceList(namespaceList), nil
}

// Create registers a given new ResourceAccessReview instance to r.registry.
func (r *REST) Create(ctx kapi.Context, obj runtime.Object) (runtime.Object, error) {
	subjectAccessReview, ok := obj.(*authorizationapi.SubjectAccessReview)
	if !ok {
		return nil, kerrors.NewBadRequest(fmt.Sprintf("not a subjectAccessReview: %#v", obj))
	}
	if err := kutilerrors.NewAggregate(authorizationvalidation.ValidateSubjectAccessReview(subjectAccessReview)); err != nil {
		return nil, err
	}

	var userToCheck user.Info
	if (len(subjectAccessReview.User) == 0) && (len(subjectAccessReview.Groups) == 0) {
		// if no user or group was specified, use the info from the context
		ctxUser, exists := kapi.UserFrom(ctx)
		if !exists {
			return nil, kerrors.NewBadRequest("user missing from context")
		}
		userToCheck = ctxUser

	} else {
		userToCheck = &user.DefaultInfo{
			Name:   subjectAccessReview.User,
			Groups: subjectAccessReview.Groups.List(),
		}

	}

	namespace := kapi.NamespaceValue(ctx)
	requestContext := kapi.WithUser(ctx, userToCheck)

	attributes := &authorizer.DefaultAuthorizationAttributes{
		Verb:     subjectAccessReview.Verb,
		Resource: subjectAccessReview.Resource,
	}

	allowed, reason, err := r.authorizer.Authorize(requestContext, attributes)
	if err != nil {
		return nil, err
	}

	response := &authorizationapi.SubjectAccessReviewResponse{
		Namespace: namespace,
		Allowed:   allowed,
		Reason:    reason,
	}

	return response, nil
}

// ConnectResource returns a function that handles a connect request on a rest.Storage object.
func ConnectResource(connecter rest.Connecter, scope RequestScope, admit admission.Interface, connectOptionsKind, restPath string, subpath bool, subpathKey string) restful.RouteFunction {
	return func(req *restful.Request, res *restful.Response) {
		w := res.ResponseWriter
		namespace, name, err := scope.Namer.Name(req)
		if err != nil {
			errorJSON(err, scope.Codec, w)
			return
		}
		ctx := scope.ContextFunc(req)
		ctx = api.WithNamespace(ctx, namespace)
		opts, err := getRequestOptions(req, scope, connectOptionsKind, subpath, subpathKey)
		if err != nil {
			errorJSON(err, scope.Codec, w)
			return
		}
		if admit.Handles(admission.Connect) {
			connectRequest := &rest.ConnectRequest{
				Name:         name,
				Options:      opts,
				ResourcePath: restPath,
			}
			userInfo, _ := api.UserFrom(ctx)

			err = admit.Admit(admission.NewAttributesRecord(connectRequest, scope.Kind, namespace, name, scope.Resource, scope.Subresource, admission.Connect, userInfo))
			if err != nil {
				errorJSON(err, scope.Codec, w)
				return
			}
		}
		handler, err := connecter.Connect(ctx, name, opts)
		if err != nil {
			errorJSON(err, scope.Codec, w)
			return
		}
		handler.ServeHTTP(w, req.Request)
		err = handler.RequestError()
		if err != nil {
			errorJSON(err, scope.Codec, w)
			return
		}
	}
}

func (a *openshiftAuthorizer) Authorize(ctx kapi.Context, passedAttributes AuthorizationAttributes) (bool, string, error) {
	attributes := coerceToDefaultAuthorizationAttributes(passedAttributes)

	// keep track of errors in case we are unable to authorize the action.
	// It is entirely possible to get an error and be able to continue determine authorization status in spite of it.
	// This is most common when a bound role is missing, but enough roles are still present and bound to authorize the request.
	errs := []error{}

	masterContext := kapi.WithNamespace(ctx, kapi.NamespaceNone)
	globalAllowed, globalReason, err := a.authorizeWithNamespaceRules(masterContext, attributes)
	if globalAllowed {
		return true, globalReason, nil
	}
	if err != nil {
		errs = append(errs, err)
	}

	namespace, _ := kapi.NamespaceFrom(ctx)
	if len(namespace) != 0 {
		namespaceAllowed, namespaceReason, err := a.authorizeWithNamespaceRules(ctx, attributes)
		if namespaceAllowed {
			return true, namespaceReason, nil
		}
		if err != nil {
			errs = append(errs, err)
		}
	}

	if len(errs) > 0 {
		return false, "", kerrors.NewAggregate(errs)
	}

	user, _ := kapi.UserFrom(ctx)
	denyReason, err := a.forbiddenMessageMaker.MakeMessage(MessageContext{user, namespace, attributes})
	if err != nil {
		denyReason = err.Error()
	}

	return false, denyReason, nil
}

// Get retrieves the item from etcd.
func (r *REST) Get(ctx kapi.Context, name string) (runtime.Object, error) {
	// "~" means the currently authenticated user
	if name == "~" {
		user, ok := kapi.UserFrom(ctx)
		if !ok || user.GetName() == "" {
			return nil, kerrs.NewForbidden("user", "~", errors.New("requests to ~ must be authenticated"))
		}
		name = user.GetName()

		// remove the known virtual groups from the list if they are present
		contextGroups := kutil.NewStringSet(user.GetGroups()...)
		contextGroups.Delete(bootstrappolicy.UnauthenticatedGroup, bootstrappolicy.AuthenticatedGroup)

		if ok, _ := validation.ValidateUserName(name, false); !ok {
			// The user the authentication layer has identified cannot possibly be a persisted user
			// Return an API representation of the virtual user
			return &api.User{ObjectMeta: kapi.ObjectMeta{Name: name}, Groups: contextGroups.List()}, nil
		}

		obj, err := r.Etcd.Get(ctx, name)
		if err == nil {
			return obj, nil
		}

		if !kerrs.IsNotFound(err) {
			return nil, err
		}

		return &api.User{ObjectMeta: kapi.ObjectMeta{Name: name}, Groups: contextGroups.List()}, nil
	}

	if ok, details := validation.ValidateUserName(name, false); !ok {
		return nil, fielderrors.NewFieldInvalid("metadata.name", name, details)
	}

	return r.Etcd.Get(ctx, name)
}

func (r *REST) List(ctx kapi.Context, label labels.Selector, field fields.Selector) (runtime.Object, error) {
	userInfo, exists := kapi.UserFrom(ctx)
	if !exists {
		return nil, errors.New("a user must be provided")
	}

	// the caller might not have permission to run a subject access review (he has it by default, but it could have been removed).
	// So we'll escalate for the subject access review to determine rights
	accessReview := &authorizationapi.SubjectAccessReview{
		Verb:     "create",
		Resource: "projectrequests",
		User:     userInfo.GetName(),
		Groups:   util.NewStringSet(userInfo.GetGroups()...),
	}
	accessReviewResponse, err := r.openshiftClient.ClusterSubjectAccessReviews().Create(accessReview)
	if err != nil {
		return nil, err
	}
	if accessReviewResponse.Allowed {
		return &kapi.Status{Status: kapi.StatusSuccess}, nil
	}

	forbiddenError, _ := kapierror.NewForbidden("ProjectRequest", "", errors.New("you may not request a new project via this API.")).(*kapierror.StatusError)
	if len(r.message) > 0 {
		forbiddenError.ErrStatus.Message = r.message
		forbiddenError.ErrStatus.Details = &kapi.StatusDetails{
			Kind: "ProjectRequest",
			Causes: []kapi.StatusCause{
				{Message: r.message},
			},
		}
	} else {
		forbiddenError.ErrStatus.Message = "You may not request a new project via this API."
	}
	return nil, forbiddenError
}

// UpdateResource returns a function that will handle a resource update
func UpdateResource(r rest.Updater, scope RequestScope, typer runtime.ObjectTyper, admit admission.Interface) restful.RouteFunction {
	return func(req *restful.Request, res *restful.Response) {
		w := res.ResponseWriter

		// TODO: we either want to remove timeout or document it (if we document, move timeout out of this function and declare it in api_installer)
		timeout := parseTimeout(req.Request.URL.Query().Get("timeout"))

		namespace, name, err := scope.Namer.Name(req)
		if err != nil {
			errorJSON(err, scope.Codec, w)
			return
		}
		ctx := scope.ContextFunc(req)
		ctx = api.WithNamespace(ctx, namespace)

		body, err := readBody(req.Request)
		if err != nil {
			errorJSON(err, scope.Codec, w)
			return
		}

		obj := r.New()
		if err := scope.Codec.DecodeInto(body, obj); err != nil {
			err = transformDecodeError(typer, err, obj, body)
			errorJSON(err, scope.Codec, w)
			return
		}

		if err := checkName(obj, name, namespace, scope.Namer); err != nil {
			errorJSON(err, scope.Codec, w)
			return
		}

		if admit.Handles(admission.Update) {
			userInfo, _ := api.UserFrom(ctx)
			err = admit.Admit(admission.NewAttributesRecord(obj, scope.Kind, namespace, scope.Resource, admission.Update, userInfo))
			if err != nil {
				errorJSON(err, scope.Codec, w)
				return
			}
		}

		wasCreated := false
		result, err := finishRequest(timeout, func() (runtime.Object, error) {
			obj, created, err := r.Update(ctx, obj)
			wasCreated = created
			return obj, err
		})
		if err != nil {
			errorJSON(err, scope.Codec, w)
			return
		}

		if err := setSelfLink(result, req, scope.Namer); err != nil {
			errorJSON(err, scope.Codec, w)
			return
		}

		status := http.StatusOK
		if wasCreated {
			status = http.StatusCreated
		}
		writeJSON(status, scope.Codec, result, w, isPrettyPrint(req.Request))
	}
}

func (r *REST) Create(ctx kapi.Context, obj runtime.Object) (runtime.Object, error) {

	if err := rest.BeforeCreate(projectrequestregistry.Strategy, ctx, obj); err != nil {
		return nil, err
	}

	projectRequest := obj.(*projectapi.ProjectRequest)

	if _, err := r.openshiftClient.Projects().Get(projectRequest.Name); err == nil {
		return nil, kapierror.NewAlreadyExists("project", projectRequest.Name)
	}

	projectName := projectRequest.Name
	projectAdmin := ""
	if userInfo, exists := kapi.UserFrom(ctx); exists {
		projectAdmin = userInfo.GetName()
	}

	template, err := r.getTemplate()
	if err != nil {
		return nil, err
	}

	for i := range template.Parameters {
		switch template.Parameters[i].Name {
		case ProjectAdminUserParam:
			template.Parameters[i].Value = projectAdmin
		case ProjectDescriptionParam:
			template.Parameters[i].Value = projectRequest.Description
		case ProjectDisplayNameParam:
			template.Parameters[i].Value = projectRequest.DisplayName
		case ProjectNameParam:
			template.Parameters[i].Value = projectName
		}
	}

	list, err := r.openshiftClient.TemplateConfigs(kapi.NamespaceDefault).Create(template)
	if err != nil {
		return nil, err
	}
	if err := utilerrors.NewAggregate(runtime.DecodeList(list.Objects, kapi.Scheme)); err != nil {
		return nil, kapierror.NewInternalError(err)
	}

	// one of the items in this list should be the project.  We are going to locate it, remove it from the list, create it separately
	var projectFromTemplate *projectapi.Project
	objectsToCreate := &kapi.List{}
	for i := range list.Objects {
		if templateProject, ok := list.Objects[i].(*projectapi.Project); ok {
			projectFromTemplate = templateProject

			if len(list.Objects) > (i + 1) {
				objectsToCreate.Items = append(objectsToCreate.Items, list.Objects[i+1:]...)
			}
			break
		}

		objectsToCreate.Items = append(objectsToCreate.Items, list.Objects[i])
	}
	if projectFromTemplate == nil {
		return nil, kapierror.NewInternalError(fmt.Errorf("the project template (%s/%s) is not correctly configured: must contain a project resource", r.templateNamespace, r.templateName))
	}

	// we split out project creation separately so that in a case of racers for the same project, only one will win and create the rest of their template objects
	if _, err := r.openshiftClient.Projects().Create(projectFromTemplate); err != nil {
		return nil, err
	}

	bulk := configcmd.Bulk{
		Mapper: latest.RESTMapper,
		Typer:  kapi.Scheme,
		RESTClientFactory: func(mapping *meta.RESTMapping) (resource.RESTClient, error) {
			return r.openshiftClient, nil
		},
	}
	if err := utilerrors.NewAggregate(bulk.Create(objectsToCreate, projectName)); err != nil {
		return nil, kapierror.NewInternalError(err)
	}

	return r.openshiftClient.Projects().Get(projectName)
}

// DeleteResource returns a function that will handle a resource deletion
func DeleteResource(r rest.GracefulDeleter, checkBody bool, scope RequestScope, admit admission.Interface) restful.RouteFunction {
	return func(req *restful.Request, res *restful.Response) {
		w := res.ResponseWriter

		// TODO: we either want to remove timeout or document it (if we document, move timeout out of this function and declare it in api_installer)
		timeout := parseTimeout(req.Request.URL.Query().Get("timeout"))

		namespace, name, err := scope.Namer.Name(req)
		if err != nil {
			errorJSON(err, scope.Codec, w)
			return
		}
		ctx := scope.ContextFunc(req)
		ctx = api.WithNamespace(ctx, namespace)

		options := &api.DeleteOptions{}
		if checkBody {
			body, err := readBody(req.Request)
			if err != nil {
				errorJSON(err, scope.Codec, w)
				return
			}
			if len(body) > 0 {
				if err := scope.Codec.DecodeInto(body, options); err != nil {
					errorJSON(err, scope.Codec, w)
					return
				}
			}
		}

		if admit.Handles(admission.Delete) {
			userInfo, _ := api.UserFrom(ctx)
			err = admit.Admit(admission.NewAttributesRecord(nil, scope.Kind, namespace, scope.Resource, admission.Delete, userInfo))
			if err != nil {
				errorJSON(err, scope.Codec, w)
				return
			}
		}

		result, err := finishRequest(timeout, func() (runtime.Object, error) {
			return r.Delete(ctx, name, options)
		})
		if err != nil {
			errorJSON(err, scope.Codec, w)
			return
		}

		// if the rest.Deleter returns a nil object, fill out a status. Callers may return a valid
		// object with the response.
		if result == nil {
			result = &api.Status{
				Status: api.StatusSuccess,
				Code:   http.StatusOK,
				Details: &api.StatusDetails{
					ID:   name,
					Kind: scope.Kind,
				},
			}
		} else {
			// when a non-status response is returned, set the self link
			if _, ok := result.(*api.Status); !ok {
				if err := setSelfLink(result, req, scope.Namer); err != nil {
					errorJSON(err, scope.Codec, w)
					return
				}
			}
		}
		write(http.StatusOK, scope.APIVersion, scope.Codec, result, w, req.Request)
	}
}