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// Copyright 2024 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package keygenconfig_test
import (
"errors"
"reflect"
"testing"
"github.com/tink-crypto/tink-go/v2/internal/keygenconfig"
"github.com/tink-crypto/tink-go/v2/key"
)
type stubParams1 struct{}
func (p *stubParams1) HasIDRequirement() bool { return true }
func (p *stubParams1) Equal(other key.Parameters) bool { return true }
type stubKey1 struct{}
func (k *stubKey1) Parameters() key.Parameters { return &stubParams1{} }
func (k *stubKey1) Equal(other key.Key) bool { return true }
func (k *stubKey1) IDRequirement() (uint32, bool) { return 123, true }
func stubKeyCreator1(p key.Parameters, idRequirement uint32) (key.Key, error) {
return &stubKey1{}, nil
}
type stubParams2 struct{}
func (p *stubParams2) HasIDRequirement() bool { return false }
func (p *stubParams2) Equal(other key.Parameters) bool { return true }
type stubKey2 struct{}
func (k *stubKey2) Parameters() key.Parameters { return nil }
func (k *stubKey2) Equal(other key.Key) bool { return true }
func (k *stubKey2) IDRequirement() (uint32, bool) { return 123, true }
func stubKeyCreator2(p key.Parameters, idRequirement uint32) (key.Key, error) {
return &stubKey2{}, nil
}
func TestRegisterKeyCreatorWorks(t *testing.T) {
config := keygenconfig.New()
if err := config.RegisterKeyCreator(reflect.TypeOf((*stubParams1)(nil)), stubKeyCreator1); err != nil {
t.Fatalf("config.RegisterKeyCreator(reflect.TypeOf((*stubParams1)(nil)), stubKeyCreator1) err = %v, want nil", err)
}
if err := config.RegisterKeyCreator(reflect.TypeOf((*stubParams2)(nil)), stubKeyCreator2); err != nil {
t.Fatalf("config.RegisterKeyCreator(reflect.TypeOf((*stubParams2)(nil)), stubKeyCreator2) err = %v, want nil", err)
}
key1, err := config.CreateKey(&stubParams1{}, 123)
if err != nil {
t.Fatalf("config.CreateKey(&stubParams1{}, 123) err = %v, want nil", err)
}
if _, ok := key1.(*stubKey1); !ok {
t.Errorf("key is of type %T; want *stubKey1", key1)
}
key2, err := config.CreateKey(&stubParams2{}, 123)
if err != nil {
t.Fatalf("config.CreateKey(&stubParams2{}, 123) err = %v, want nil", err)
}
if _, ok := key2.(*stubKey2); !ok {
t.Errorf("key is of type %T; want *stubKey2", key2)
}
}
func TestRegisterKeyCreatorFailsIfRegisteredTwice(t *testing.T) {
config := keygenconfig.New()
if err := config.RegisterKeyCreator(reflect.TypeOf((*stubParams1)(nil)), stubKeyCreator1); err != nil {
t.Errorf("config.RegisterKeyCreator(reflect.TypeOf((*stubParams1)(nil)), stubKeyCreator1) err = %v, want nil", err)
}
// Another creator function for the same type fails.
if err := config.RegisterKeyCreator(reflect.TypeOf((*stubParams1)(nil)), stubKeyCreator2); err == nil {
t.Errorf("config.RegisterKeyCreator(reflect.TypeOf((*stubParams1)(nil)), stubKeyCreator1) err = nil, want error")
}
}
func TestCreateKeyFailsIfKeyCreatorIsNotRegistered(t *testing.T) {
config := keygenconfig.New()
if _, err := config.CreateKey(&stubParams1{}, 123); err == nil {
t.Errorf("config.CreateKey(&stubParams1{}, 123) err = nil, want error")
}
}
func stubKeyCreatorFails(p key.Parameters, idRequirement uint32) (key.Key, error) {
return nil, errors.New("oh no :(")
}
func TestCreateKeyFailsIfKeyCreatorFails(t *testing.T) {
config := keygenconfig.New()
if err := config.RegisterKeyCreator(reflect.TypeOf((*stubParams1)(nil)), stubKeyCreatorFails); err != nil {
t.Errorf("config.RegisterKeyCreator(reflect.TypeOf((*stubParams1)(nil)), stubKeyCreatorFails) err = %v, want nil", err)
}
if _, err := config.CreateKey(&stubParams1{}, 123); err == nil {
t.Errorf("config.CreateKey(&stubParams1{}, 123) err = nil, want error")
}
}
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