feat(api): add tenant funcs to retrieve subjects based on clusterrole bindings (#1231)

Signed-off-by: Oliver Bähler <oliverbaehler@hotmail.com>

api/v1beta2/tenant_func.go

@@ -4,9 +4,13 @@
 package v1beta2
 
 import (
+	"slices"
 	"sort"
 
 	corev1 "k8s.io/api/core/v1"
+	rbacv1 "k8s.io/api/rbac/v1"
+
+	"github.com/projectcapsule/capsule/pkg/api"
 )
 
 func (in *Tenant) IsFull() bool {
@@ -36,3 +40,128 @@ func (in *Tenant) AssignNamespaces(namespaces []corev1.Namespace) {
 func (in *Tenant) GetOwnerProxySettings(name string, kind OwnerKind) []ProxySettings {
 	return in.Spec.Owners.FindOwner(name, kind).ProxyOperations
 }
+
+// GetClusterRolePermissions returns a map where the clusterRole is the key
+// and the value is a list of permission subjects (kind and name) that reference that role.
+// These mappings are gathered from the owners and additionalRolebindings spec.
+func (in *Tenant) GetSubjectsByClusterRoles(ignoreOwnerKind []OwnerKind) (rolePerms map[string][]rbacv1.Subject) {
+	rolePerms = make(map[string][]rbacv1.Subject)
+
+	// Helper to add permissions for a given clusterRole
+	addPermission := func(clusterRole string, permission rbacv1.Subject) {
+		if _, exists := rolePerms[clusterRole]; !exists {
+			rolePerms[clusterRole] = []rbacv1.Subject{}
+		}
+
+		rolePerms[clusterRole] = append(rolePerms[clusterRole], permission)
+	}
+
+	// Helper to check if a kind is in the ignoreOwnerKind list
+	isIgnoredKind := func(kind string) bool {
+		for _, ignored := range ignoreOwnerKind {
+			if kind == ignored.String() {
+				return true
+			}
+		}
+
+		return false
+	}
+
+	// Process owners
+	for _, owner := range in.Spec.Owners {
+		if !isIgnoredKind(owner.Kind.String()) {
+			for _, clusterRole := range owner.ClusterRoles {
+				perm := rbacv1.Subject{
+					Name: owner.Name,
+					Kind: owner.Kind.String(),
+				}
+				addPermission(clusterRole, perm)
+			}
+		}
+	}
+
+	// Process additional role bindings
+	for _, role := range in.Spec.AdditionalRoleBindings {
+		for _, subject := range role.Subjects {
+			if !isIgnoredKind(subject.Kind) {
+				perm := rbacv1.Subject{
+					Name: subject.Name,
+					Kind: subject.Kind,
+				}
+				addPermission(role.ClusterRoleName, perm)
+			}
+		}
+	}
+
+	return
+}
+
+// Get the permissions for a tenant ordered by groups and users.
+func (in *Tenant) GetClusterRolesBySubject(ignoreOwnerKind []OwnerKind) (maps map[string]map[string]api.TenantSubjectRoles) {
+	maps = make(map[string]map[string]api.TenantSubjectRoles)
+
+	// Initialize a nested map for kind ("User", "Group") and name
+	initNestedMap := func(kind string) {
+		if _, exists := maps[kind]; !exists {
+			maps[kind] = make(map[string]api.TenantSubjectRoles)
+		}
+	}
+	// Helper to check if a kind is in the ignoreOwnerKind list
+	isIgnoredKind := func(kind string) bool {
+		for _, ignored := range ignoreOwnerKind {
+			if kind == ignored.String() {
+				return true
+			}
+		}
+
+		return false
+	}
+
+	// Process owners
+	for _, owner := range in.Spec.Owners {
+		if !isIgnoredKind(owner.Kind.String()) {
+			initNestedMap(owner.Kind.String())
+
+			if perm, exists := maps[owner.Kind.String()][owner.Name]; exists {
+				// If the permission entry already exists, append cluster roles
+				perm.ClusterRoles = append(perm.ClusterRoles, owner.ClusterRoles...)
+				maps[owner.Kind.String()][owner.Name] = perm
+			} else {
+				// Create a new permission entry
+				maps[owner.Kind.String()][owner.Name] = api.TenantSubjectRoles{
+					ClusterRoles: owner.ClusterRoles,
+				}
+			}
+		}
+	}
+
+	// Process additional role bindings
+	for _, role := range in.Spec.AdditionalRoleBindings {
+		for _, subject := range role.Subjects {
+			if !isIgnoredKind(subject.Kind) {
+				initNestedMap(subject.Kind)
+
+				if perm, exists := maps[subject.Kind][subject.Name]; exists {
+					// If the permission entry already exists, append cluster roles
+					perm.ClusterRoles = append(perm.ClusterRoles, role.ClusterRoleName)
+					maps[subject.Kind][subject.Name] = perm
+				} else {
+					// Create a new permission entry
+					maps[subject.Kind][subject.Name] = api.TenantSubjectRoles{
+						ClusterRoles: []string{role.ClusterRoleName},
+					}
+				}
+			}
+		}
+	}
+
+	// Remove duplicates from cluster roles in both maps
+	for kind, nameMap := range maps {
+		for name, perm := range nameMap {
+			perm.ClusterRoles = slices.Compact(perm.ClusterRoles)
+			maps[kind][name] = perm
+		}
+	}
+
+	return maps
+}

api/v1beta2/tenant_func_test.go

@@ -0,0 +1,192 @@
+// Copyright 2020-2023 Project Capsule Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package v1beta2
+
+import (
+	"reflect"
+	"testing"
+
+	"github.com/projectcapsule/capsule/pkg/api"
+	rbacv1 "k8s.io/api/rbac/v1"
+)
+
+var tenant = &Tenant{
+	Spec: TenantSpec{
+		Owners: []OwnerSpec{
+			{
+				Kind:         "User",
+				Name:         "user1",
+				ClusterRoles: []string{"cluster-admin", "read-only"},
+			},
+			{
+				Kind:         "Group",
+				Name:         "group1",
+				ClusterRoles: []string{"edit"},
+			},
+			{
+				Kind:         ServiceAccountOwner,
+				Name:         "service",
+				ClusterRoles: []string{"read-only"},
+			},
+		},
+		AdditionalRoleBindings: []api.AdditionalRoleBindingsSpec{
+			{
+				ClusterRoleName: "developer",
+				Subjects: []rbacv1.Subject{
+					{Kind: "User", Name: "user2"},
+					{Kind: "Group", Name: "group1"},
+				},
+			},
+			{
+				ClusterRoleName: "cluster-admin",
+				Subjects: []rbacv1.Subject{
+					{
+						Kind: "User",
+						Name: "user3",
+					},
+					{
+						Kind: "Group",
+						Name: "group1",
+					},
+				},
+			},
+			{
+				ClusterRoleName: "deployer",
+				Subjects: []rbacv1.Subject{
+					{
+						Kind: "ServiceAccount",
+						Name: "system:serviceaccount:argocd:argo-operator",
+					},
+				},
+			},
+		},
+	},
+}
+
+// TestGetClusterRolePermissions tests the GetClusterRolePermissions function
+func TestGetSubjectsByClusterRoles(t *testing.T) {
+	expected := map[string][]rbacv1.Subject{
+		"cluster-admin": {
+			{Kind: "User", Name: "user1"},
+			{Kind: "User", Name: "user3"},
+			{Kind: "Group", Name: "group1"},
+		},
+		"read-only": {
+			{Kind: "User", Name: "user1"},
+			{Kind: "ServiceAccount", Name: "service"},
+		},
+		"edit": {
+			{Kind: "Group", Name: "group1"},
+		},
+		"developer": {
+			{Kind: "User", Name: "user2"},
+			{Kind: "Group", Name: "group1"},
+		},
+		"deployer": {
+			{Kind: "ServiceAccount", Name: "system:serviceaccount:argocd:argo-operator"},
+		},
+	}
+
+	// Call the function to test
+	permissions := tenant.GetSubjectsByClusterRoles(nil)
+
+	if !reflect.DeepEqual(permissions, expected) {
+		t.Errorf("Expected %v, but got %v", expected, permissions)
+	}
+
+	// Ignore SubjectTypes (Ignores ServiceAccounts)
+	ignored := tenant.GetSubjectsByClusterRoles([]OwnerKind{"ServiceAccount"})
+	expectedIgnored := map[string][]rbacv1.Subject{
+		"cluster-admin": {
+			{Kind: "User", Name: "user1"},
+			{Kind: "User", Name: "user3"},
+			{Kind: "Group", Name: "group1"},
+		},
+		"read-only": {
+			{Kind: "User", Name: "user1"},
+		},
+		"edit": {
+			{Kind: "Group", Name: "group1"},
+		},
+		"developer": {
+			{Kind: "User", Name: "user2"},
+			{Kind: "Group", Name: "group1"},
+		},
+	}
+
+	if !reflect.DeepEqual(ignored, expectedIgnored) {
+		t.Errorf("Expected %v, but got %v", expectedIgnored, ignored)
+	}
+
+}
+
+func TestGetClusterRolesBySubject(t *testing.T) {
+
+	expected := map[string]map[string]api.TenantSubjectRoles{
+		"User": {
+			"user1": {
+				ClusterRoles: []string{"cluster-admin", "read-only"},
+			},
+			"user2": {
+				ClusterRoles: []string{"developer"},
+			},
+			"user3": {
+				ClusterRoles: []string{"cluster-admin"},
+			},
+		},
+		"Group": {
+			"group1": {
+				ClusterRoles: []string{"edit", "developer", "cluster-admin"},
+			},
+		},
+		"ServiceAccount": {
+			"service": {
+				ClusterRoles: []string{"read-only"},
+			},
+			"system:serviceaccount:argocd:argo-operator": {
+				ClusterRoles: []string{"deployer"},
+			},
+		},
+	}
+
+	permissions := tenant.GetClusterRolesBySubject(nil)
+	if !reflect.DeepEqual(permissions, expected) {
+		t.Errorf("Expected %v, but got %v", expected, permissions)
+	}
+
+	delete(expected, "ServiceAccount")
+	ignored := tenant.GetClusterRolesBySubject([]OwnerKind{"ServiceAccount"})
+
+	if !reflect.DeepEqual(ignored, expected) {
+		t.Errorf("Expected %v, but got %v", expected, ignored)
+	}
+}
+
+// Helper function to run tests
+func TestMain(t *testing.M) {
+	t.Run()
+}
+
+// permissionsEqual checks the equality of two TenantPermission structs.
+func permissionsEqual(a, b api.TenantSubjectRoles) bool {
+	if a.Kind != b.Kind {
+		return false
+	}
+	if len(a.ClusterRoles) != len(b.ClusterRoles) {
+		return false
+	}
+
+	// Create a map to count occurrences of cluster roles
+	counts := make(map[string]int)
+	for _, role := range a.ClusterRoles {
+		counts[role]++
+	}
+	for _, role := range b.ClusterRoles {
+		counts[role]--
+		if counts[role] < 0 {
+			return false // More occurrences in b than in a
+		}
+	}
+	return true
+}

pkg/api/tenant_roles.go

@@ -0,0 +1,12 @@
+// Copyright 2020-2023 Project Capsule Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package api
+
+// Type to extract all clusterroles for a subject on a tenant
+// from the owner and additionalRoleBindings spec.
+type TenantSubjectRoles struct {
+	Kind         string
+	Name         string
+	ClusterRoles []string
+}