Implement activation service

Signed-off-by: Daniel Weiße <dw@edgeless.systems>

activation/server/server_test.go

@@ -0,0 +1,123 @@
+package server
+
+import (
+	"context"
+	"encoding/json"
+	"errors"
+	"testing"
+	"time"
+
+	proto "github.com/edgelesssys/constellation/activation/activationproto"
+	"github.com/edgelesssys/constellation/internal/constants"
+	"github.com/edgelesssys/constellation/internal/file"
+	"github.com/spf13/afero"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+	kubeadmv1 "k8s.io/kubernetes/cmd/kubeadm/app/apis/kubeadm/v1beta3"
+)
+
+func TestActivateNode(t *testing.T) {
+	someErr := errors.New("error")
+	testKey := []byte{0x1, 0x2, 0x3}
+	testID := id{
+		Owner:   []byte{0x4, 0x5, 0x6},
+		Cluster: []byte{0x7, 0x8, 0x9},
+	}
+	testJoinToken := &kubeadmv1.BootstrapTokenDiscovery{
+		APIServerEndpoint: "192.0.2.1",
+		CACertHashes:      []string{"hash"},
+		Token:             "token",
+	}
+
+	testCases := map[string]struct {
+		kubeadm stubTokenGetter
+		kms     stubKeyGetter
+		id      []byte
+		wantErr bool
+	}{
+		"success": {
+			kubeadm: stubTokenGetter{token: testJoinToken},
+			kms:     stubKeyGetter{dataKey: testKey},
+			id:      mustMarshalID(testID),
+		},
+		"GetDataKey fails": {
+			kubeadm: stubTokenGetter{token: testJoinToken},
+			kms:     stubKeyGetter{getDataKeyErr: someErr},
+			id:      mustMarshalID(testID),
+			wantErr: true,
+		},
+		"loading IDs fails": {
+			kubeadm: stubTokenGetter{token: testJoinToken},
+			kms:     stubKeyGetter{dataKey: testKey},
+			id:      []byte{0x1, 0x2, 0x3},
+			wantErr: true,
+		},
+		"no ID file": {
+			kubeadm: stubTokenGetter{token: testJoinToken},
+			kms:     stubKeyGetter{dataKey: testKey},
+			wantErr: true,
+		},
+		"GetJoinToken fails": {
+			kubeadm: stubTokenGetter{getJoinTokenErr: someErr},
+			kms:     stubKeyGetter{dataKey: testKey},
+			id:      mustMarshalID(testID),
+			wantErr: true,
+		},
+	}
+
+	for name, tc := range testCases {
+		t.Run(name, func(t *testing.T) {
+			assert := assert.New(t)
+			require := require.New(t)
+
+			file := file.NewHandler(afero.NewMemMapFs())
+			if len(tc.id) > 0 {
+				require.NoError(file.Write(constants.ActivationIDFilename, tc.id, 0o644))
+			}
+			api := New(file, tc.kubeadm, tc.kms)
+
+			resp, err := api.ActivateNode(context.Background(), &proto.ActivateNodeRequest{DiskUuid: "uuid"})
+			if tc.wantErr {
+				assert.Error(err)
+				return
+			}
+
+			var expectedIDs id
+			require.NoError(json.Unmarshal(tc.id, &expectedIDs))
+
+			require.NoError(err)
+			assert.Equal(tc.kms.dataKey, resp.StateDiskKey)
+			assert.Equal(expectedIDs.Cluster, resp.ClusterId)
+			assert.Equal(expectedIDs.Owner, resp.OwnerId)
+			assert.Equal(tc.kubeadm.token.APIServerEndpoint, resp.ApiServerEndpoint)
+			assert.Equal(tc.kubeadm.token.CACertHashes[0], resp.DiscoveryTokenCaCertHash)
+			assert.Equal(tc.kubeadm.token.Token, resp.Token)
+		})
+	}
+}
+
+func mustMarshalID(id id) []byte {
+	b, err := json.Marshal(id)
+	if err != nil {
+		panic(err)
+	}
+	return b
+}
+
+type stubTokenGetter struct {
+	token           *kubeadmv1.BootstrapTokenDiscovery
+	getJoinTokenErr error
+}
+
+func (f stubTokenGetter) GetJoinToken(time.Duration) (*kubeadmv1.BootstrapTokenDiscovery, error) {
+	return f.token, f.getJoinTokenErr
+}
+
+type stubKeyGetter struct {
+	dataKey       []byte
+	getDataKeyErr error
+}
+
+func (f stubKeyGetter) GetDataKey(context.Context, string, int) ([]byte, error) {
+	return f.dataKey, f.getDataKeyErr
+}