go/hybrid/hybrid_b243759652_test.go

// Copyright 2019 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 hybrid_test

import (
	"testing"

	"github.com/google/tink/go/aead"
	"github.com/google/tink/go/hybrid"
	"github.com/google/tink/go/keyset"
)

/* This test demonstrates buggy behavior of Tink. Please do not rely on it. */
func TestBHybridDecrypt(t *testing.T) {
	manager := keyset.NewManager()
	id, err := manager.Add(aead.AES256GCMKeyTemplate())
	if err != nil {
		t.Fatalf("manager.Add gives err = '%v', want nil", err)
	}
	err = manager.SetPrimary(id)
	if err != nil {
		t.Fatalf("manager.SetPrimary gives err = '%v', want nil", err)
	}
	_, err = manager.Add(hybrid.DHKEM_X25519_HKDF_SHA256_HKDF_SHA256_AES_128_GCM_Key_Template())
	if err != nil {
		t.Fatalf("manager.Add gives err = '%v', want nil", err)
	}
	handle, err := manager.Handle()
	if err != nil {
		t.Fatalf("manager.Handle gives err = '%v', want nil", err)
	}

	// TODO(b/243759652): This should fail.
	_, err = hybrid.NewHybridDecrypt(handle)
	if err != nil {
		t.Fatalf("hybrid.NewHybridDecrypt gives err = '%v', you fixed b/243759652, please change the test.", err)
	}
}

/* This test demonstrates buggy behavior of Tink. Please do not rely on it. */
func TestBHybridEncrypt(t *testing.T) {
	handle, err := keyset.NewHandle(hybrid.DHKEM_X25519_HKDF_SHA256_HKDF_SHA256_AES_128_GCM_Key_Template())
	if err != nil {
		t.Fatalf("keyset.NewHandle gives err = '%v', want nil", err)
	}
	pub, err := handle.Public()
	if err != nil {
		t.Fatalf("handle.Public gives err = '%v', want nil", err)
	}
	manager := keyset.NewManagerFromHandle(pub)
	_, err = manager.Add(aead.AES128GCMKeyTemplate())
	if err != nil {
		t.Fatalf("manager.Add gives err = '%v', want nil", err)
	}
	mixedHandle, err := manager.Handle()
	if err != nil {
		t.Fatalf("manager.Handle gives err = '%v', want nil", err)
	}
	// TODO(b/243759652): We now have a HybridEncrypt and a Aead key, so this should fail
	_, err = hybrid.NewHybridEncrypt(mixedHandle)
	if err != nil {
		t.Fatalf("hybrid.NewHybridEncrypt gives err = '%v', you fixed b/243759652, please change the test.", err)
	}
}