Hidde Beydals
1be91ee7dd
Adds two layers of coverage for the SSH commit-signing path that the previous commit wires through PlainGitBootstrapper. TestPlainGitBootstrapper_resolveSigner exercises every branch of the new dispatcher: nil configuration, GPG-only, SSH-only, encrypted-SSH- without-passphrase failure, and the documented GPG-wins-when-both- set precedence. TestPlainGitBootstrapper_sshSignerProducesVerifiableCommit drives an end-to-end roundtrip: resolveSigner returns an SSH signer, the signer plugs into repository.WithSigner, gogit.Client.Commit produces a commit object, and signature.VerifySSHSignature cryptographically verifies the gpgsig header against the matching authorized_key. Catches regressions in the SSH-signing wiring that the dispatcher unit tests would miss. Signed-off-by: Hidde Beydals <hidde@hhh.computer>
616 lines
18 KiB
Go
616 lines
18 KiB
Go
/*
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Copyright 2023 The Flux authors
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package bootstrap
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import (
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"context"
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"crypto/ed25519"
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"crypto/rand"
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"encoding/pem"
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"io"
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"strings"
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"testing"
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"github.com/ProtonMail/go-crypto/openpgp"
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"github.com/fluxcd/pkg/apis/meta"
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"github.com/fluxcd/pkg/git"
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gogit "github.com/fluxcd/pkg/git/gogit"
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"github.com/fluxcd/pkg/git/repository"
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"github.com/fluxcd/pkg/git/signature"
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extgogit "github.com/go-git/go-git/v5"
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"github.com/go-git/go-git/v5/plumbing"
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. "github.com/onsi/gomega"
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gossh "golang.org/x/crypto/ssh"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/runtime"
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"sigs.k8s.io/controller-runtime/pkg/client"
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"sigs.k8s.io/controller-runtime/pkg/client/fake"
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kustomizev1 "github.com/fluxcd/kustomize-controller/api/v1"
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notificationv1 "github.com/fluxcd/notification-controller/api/v1beta2"
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sourcev1 "github.com/fluxcd/source-controller/api/v1"
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"github.com/fluxcd/flux2/v2/internal/utils"
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)
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func Test_hasRevision(t *testing.T) {
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var revision = "main@sha1:5bf3a8f9bb0aa5ae8afd6208f43757ab73fc033a"
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tests := []struct {
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name string
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obj objectWithConditions
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rev string
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expectErr bool
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expectedBool bool
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}{
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{
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name: "Kustomization revision",
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obj: &kustomizev1.Kustomization{
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TypeMeta: metav1.TypeMeta{
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Kind: kustomizev1.KustomizationKind,
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},
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Status: kustomizev1.KustomizationStatus{
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LastAttemptedRevision: "main@sha1:5bf3a8f9bb0aa5ae8afd6208f43757ab73fc033a",
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},
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},
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expectedBool: true,
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},
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{
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name: "GitRepository revision",
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obj: &sourcev1.GitRepository{
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TypeMeta: metav1.TypeMeta{
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Kind: sourcev1.GitRepositoryKind,
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APIVersion: sourcev1.GroupVersion.String(),
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},
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Status: sourcev1.GitRepositoryStatus{
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Artifact: &meta.Artifact{
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Revision: "main@sha1:5bf3a8f9bb0aa5ae8afd6208f43757ab73fc033a",
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},
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},
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},
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expectedBool: true,
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},
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{
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name: "GitRepository revision (wrong revision)",
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obj: &sourcev1.GitRepository{
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TypeMeta: metav1.TypeMeta{
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Kind: sourcev1.GitRepositoryKind,
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APIVersion: sourcev1.GroupVersion.String(),
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},
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Status: sourcev1.GitRepositoryStatus{
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Artifact: &meta.Artifact{
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Revision: "main@sha1:e7f3a8f9bb0aa5ae8afd6208f43757ab73fc043a",
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},
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},
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},
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},
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{
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name: "Kustomization revision (empty revision)",
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obj: &kustomizev1.Kustomization{
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TypeMeta: metav1.TypeMeta{
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Kind: kustomizev1.KustomizationKind,
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},
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Status: kustomizev1.KustomizationStatus{
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LastAttemptedRevision: "",
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},
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},
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},
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{
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name: "OCIRepository revision",
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obj: &sourcev1.OCIRepository{
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TypeMeta: metav1.TypeMeta{
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Kind: sourcev1.OCIRepositoryKind,
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},
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Status: sourcev1.OCIRepositoryStatus{
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Artifact: &meta.Artifact{
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Revision: "main@sha1:5bf3a8f9bb0aa5ae8afd6208f43757ab73fc033a",
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},
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},
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},
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expectedBool: true,
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},
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{
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name: "Alert revision(Not supported)",
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obj: ¬ificationv1.Alert{
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TypeMeta: metav1.TypeMeta{
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Kind: notificationv1.AlertKind,
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},
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Status: notificationv1.AlertStatus{
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ObservedGeneration: 1,
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},
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},
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},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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g := NewWithT(t)
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obj, err := runtime.DefaultUnstructuredConverter.ToUnstructured(tt.obj)
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g.Expect(err).To(BeNil())
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got, err := hasRevision(tt.obj.GetObjectKind().GroupVersionKind().Kind, obj, revision)
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if tt.expectErr {
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g.Expect(err).To(HaveOccurred())
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return
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}
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g.Expect(got).To(Equal(tt.expectedBool))
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})
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}
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}
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func Test_objectReconciled(t *testing.T) {
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expectedRev := "main@sha1:5bf3a8f9bb0aa5ae8afd6208f43757ab73fc033a"
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type updateStatus struct {
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statusFn func(o client.Object)
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expectedErr bool
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expectedBool bool
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}
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tests := []struct {
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name string
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obj objectWithConditions
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statuses []updateStatus
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}{
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{
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name: "GitRepository with no status",
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obj: &sourcev1.GitRepository{
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TypeMeta: metav1.TypeMeta{
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Kind: sourcev1.GitRepositoryKind,
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APIVersion: sourcev1.GroupVersion.String(),
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},
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ObjectMeta: metav1.ObjectMeta{
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Name: "flux-system",
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Namespace: "flux-system",
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},
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},
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statuses: []updateStatus{
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{
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expectedErr: false,
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expectedBool: false,
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},
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},
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},
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{
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name: "suspended Kustomization",
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obj: &kustomizev1.Kustomization{
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TypeMeta: metav1.TypeMeta{
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Kind: kustomizev1.KustomizationKind,
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APIVersion: kustomizev1.GroupVersion.String(),
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},
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ObjectMeta: metav1.ObjectMeta{
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Name: "flux-system",
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Namespace: "flux-system",
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},
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Spec: kustomizev1.KustomizationSpec{
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Suspend: true,
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},
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},
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statuses: []updateStatus{
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{
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expectedErr: true,
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},
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},
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},
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{
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name: "Kustomization - status with old generation",
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obj: &kustomizev1.Kustomization{
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TypeMeta: metav1.TypeMeta{
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Kind: kustomizev1.KustomizationKind,
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APIVersion: kustomizev1.GroupVersion.String(),
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},
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ObjectMeta: metav1.ObjectMeta{
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Name: "flux-system",
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Namespace: "flux-system",
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Generation: 1,
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},
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Status: kustomizev1.KustomizationStatus{
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ObservedGeneration: -1,
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},
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},
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statuses: []updateStatus{
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{
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expectedErr: false,
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expectedBool: false,
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},
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},
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},
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{
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name: "GitRepository - status with same generation but no conditions",
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obj: &sourcev1.GitRepository{
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TypeMeta: metav1.TypeMeta{
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Kind: sourcev1.GitRepositoryKind,
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APIVersion: sourcev1.GroupVersion.String(),
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},
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ObjectMeta: metav1.ObjectMeta{
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Name: "flux-system",
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Namespace: "flux-system",
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Generation: 1,
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},
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Status: sourcev1.GitRepositoryStatus{
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ObservedGeneration: 1,
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},
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},
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statuses: []updateStatus{
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{
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expectedErr: false,
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expectedBool: false,
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},
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},
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},
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{
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name: "GitRepository - status with conditions but no ready condition",
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obj: &sourcev1.GitRepository{
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TypeMeta: metav1.TypeMeta{
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Kind: sourcev1.GitRepositoryKind,
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APIVersion: sourcev1.GroupVersion.String(),
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},
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ObjectMeta: metav1.ObjectMeta{
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Name: "flux-system",
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Namespace: "flux-system",
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Generation: 1,
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},
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Status: sourcev1.GitRepositoryStatus{
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ObservedGeneration: 1,
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Conditions: []metav1.Condition{
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{Type: meta.ReconcilingCondition, Status: metav1.ConditionTrue, ObservedGeneration: 1, Reason: "Progressing", Message: "Progressing"},
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},
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},
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},
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statuses: []updateStatus{
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{
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expectedErr: false,
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expectedBool: false,
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},
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},
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},
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{
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name: "Kustomization - status with false ready condition",
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obj: &kustomizev1.Kustomization{
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TypeMeta: metav1.TypeMeta{
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Kind: kustomizev1.KustomizationKind,
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APIVersion: kustomizev1.GroupVersion.String(),
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},
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ObjectMeta: metav1.ObjectMeta{
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Name: "flux-system",
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Namespace: "flux-system",
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Generation: 1,
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},
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Status: kustomizev1.KustomizationStatus{
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ObservedGeneration: 1,
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Conditions: []metav1.Condition{
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{Type: meta.ReadyCondition, Status: metav1.ConditionFalse, ObservedGeneration: 1, Reason: "Failing", Message: "Failed to clone"},
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},
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},
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},
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statuses: []updateStatus{
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{
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expectedErr: true,
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expectedBool: false,
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},
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},
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},
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{
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name: "Kustomization - status with true ready condition but different revision",
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obj: &kustomizev1.Kustomization{
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TypeMeta: metav1.TypeMeta{
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Kind: kustomizev1.KustomizationKind,
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APIVersion: kustomizev1.GroupVersion.String(),
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},
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ObjectMeta: metav1.ObjectMeta{
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Name: "flux-system",
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Namespace: "flux-system",
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Generation: 1,
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},
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Status: kustomizev1.KustomizationStatus{
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ObservedGeneration: 1,
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Conditions: []metav1.Condition{
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{Type: meta.ReadyCondition, Status: metav1.ConditionTrue, ObservedGeneration: 1, Reason: "Passing", Message: "Applied revision"},
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},
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LastAttemptedRevision: "main@sha1:e7f3a8f9bb0aa5ae8afd6208f43757ab73fc043a",
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},
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},
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statuses: []updateStatus{
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{
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expectedErr: false,
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expectedBool: false,
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},
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},
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},
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{
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name: "GitRepository - status with true ready condition but different revision",
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obj: &sourcev1.GitRepository{
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TypeMeta: metav1.TypeMeta{
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Kind: sourcev1.GitRepositoryKind,
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APIVersion: sourcev1.GroupVersion.String(),
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},
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ObjectMeta: metav1.ObjectMeta{
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Name: "flux-system",
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Namespace: "flux-system",
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Generation: 1,
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},
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Status: sourcev1.GitRepositoryStatus{
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ObservedGeneration: 1,
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Conditions: []metav1.Condition{
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{Type: meta.ReadyCondition, Status: metav1.ConditionTrue, ObservedGeneration: 1, Reason: "Readyyy", Message: "Cloned successfully"},
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},
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Artifact: &meta.Artifact{
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Revision: "main@sha1:e7f3a8f9bb0aa5ae8afd6208f43757ab73fc043a",
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},
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},
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},
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statuses: []updateStatus{
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{
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expectedErr: false,
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expectedBool: false,
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},
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},
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},
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{
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name: "GitRepository - ready with right revision",
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obj: &sourcev1.GitRepository{
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TypeMeta: metav1.TypeMeta{
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Kind: sourcev1.GitRepositoryKind,
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APIVersion: sourcev1.GroupVersion.String(),
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},
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ObjectMeta: metav1.ObjectMeta{
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Name: "flux-system",
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Namespace: "flux-system",
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Generation: 1,
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},
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Status: sourcev1.GitRepositoryStatus{
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ObservedGeneration: 1,
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Conditions: []metav1.Condition{
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{Type: meta.ReadyCondition, Status: metav1.ConditionTrue, ObservedGeneration: 1, Reason: "Readyyy", Message: "Cloned successfully"},
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},
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Artifact: &meta.Artifact{
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Revision: expectedRev,
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},
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},
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},
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statuses: []updateStatus{
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{
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expectedErr: false,
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expectedBool: true,
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},
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},
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},
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{
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name: "GitRepository - sequence of status updates before ready",
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obj: &sourcev1.GitRepository{
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TypeMeta: metav1.TypeMeta{
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Kind: sourcev1.GitRepositoryKind,
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APIVersion: sourcev1.GroupVersion.String(),
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},
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ObjectMeta: metav1.ObjectMeta{
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Name: "flux-system",
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Namespace: "flux-system",
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Generation: 1,
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},
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},
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statuses: []updateStatus{
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{
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// observed gen different
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statusFn: func(o client.Object) {
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gitRepo := o.(*sourcev1.GitRepository)
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gitRepo.Status = sourcev1.GitRepositoryStatus{
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ObservedGeneration: -1,
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}
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},
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},
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{
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// ready failing
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statusFn: func(o client.Object) {
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gitRepo := o.(*sourcev1.GitRepository)
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gitRepo.Status = sourcev1.GitRepositoryStatus{
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ObservedGeneration: 1,
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Conditions: []metav1.Condition{
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{Type: meta.ReadyCondition, Status: metav1.ConditionFalse, ObservedGeneration: 1, Reason: "Not Ready", Message: "Transient connection issue"},
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},
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}
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},
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expectedErr: true,
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},
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{
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// updated to a different revision
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statusFn: func(o client.Object) {
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gitRepo := o.(*sourcev1.GitRepository)
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gitRepo.Status = sourcev1.GitRepositoryStatus{
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ObservedGeneration: 1,
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Conditions: []metav1.Condition{
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{Type: meta.ReadyCondition, Status: metav1.ConditionTrue, ObservedGeneration: 1, Reason: "Readyyy", Message: "Cloned successfully"},
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},
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Artifact: &meta.Artifact{
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Revision: "wrong rev",
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},
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}
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},
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},
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{
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// updated to the expected revision
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statusFn: func(o client.Object) {
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gitRepo := o.(*sourcev1.GitRepository)
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gitRepo.Status = sourcev1.GitRepositoryStatus{
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ObservedGeneration: 1,
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Conditions: []metav1.Condition{
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{Type: meta.ReadyCondition, Status: metav1.ConditionTrue, ObservedGeneration: 1, Reason: "Readyyy", Message: "Cloned successfully"},
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},
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Artifact: &meta.Artifact{
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Revision: expectedRev,
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},
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}
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},
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expectedBool: true,
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},
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},
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},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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g := NewWithT(t)
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builder := fake.NewClientBuilder().WithScheme(utils.NewScheme())
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builder.WithObjects(tt.obj)
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kubeClient := builder.Build()
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for _, updates := range tt.statuses {
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if updates.statusFn != nil {
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updates.statusFn(tt.obj)
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cloneObj := tt.obj.DeepCopyObject().(client.Object)
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g.Expect(kubeClient.Update(context.TODO(), cloneObj)).To(Succeed())
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}
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waitFunc := objectReconciled(kubeClient, client.ObjectKeyFromObject(tt.obj), tt.obj, expectedRev)
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got, err := waitFunc(context.TODO())
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g.Expect(err != nil).To(Equal(updates.expectedErr), "unexpected error: %v, for: %v", err, tt.obj)
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g.Expect(got).To(Equal(updates.expectedBool))
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}
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})
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}
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}
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func TestPlainGitBootstrapper_resolveSigner(t *testing.T) {
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t.Run("no signing configured returns nil signer", func(t *testing.T) {
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g := NewWithT(t)
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b := &PlainGitBootstrapper{}
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signer, err := b.resolveSigner()
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g.Expect(err).ToNot(HaveOccurred())
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g.Expect(signer).To(BeNil())
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})
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t.Run("GPG key ring returns an OpenPGP signer", func(t *testing.T) {
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g := NewWithT(t)
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entity, err := openpgp.NewEntity("Alice", "test", "alice@example.com", nil)
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g.Expect(err).ToNot(HaveOccurred())
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b := &PlainGitBootstrapper{gpgKeyRing: openpgp.EntityList{entity}}
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signer, err := b.resolveSigner()
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g.Expect(err).ToNot(HaveOccurred())
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g.Expect(signer).ToNot(BeNil())
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})
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t.Run("SSH key returns an SSH signer", func(t *testing.T) {
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g := NewWithT(t)
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_, priv, err := ed25519.GenerateKey(rand.Reader)
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g.Expect(err).ToNot(HaveOccurred())
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block, err := gossh.MarshalPrivateKey(priv, "test ed25519 key")
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g.Expect(err).ToNot(HaveOccurred())
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pemBytes := pem.EncodeToMemory(block)
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|
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b := &PlainGitBootstrapper{sshSigningKey: pemBytes}
|
|
signer, err := b.resolveSigner()
|
|
g.Expect(err).ToNot(HaveOccurred())
|
|
g.Expect(signer).ToNot(BeNil())
|
|
})
|
|
|
|
t.Run("encrypted SSH key without password errors", func(t *testing.T) {
|
|
g := NewWithT(t)
|
|
_, priv, err := ed25519.GenerateKey(rand.Reader)
|
|
g.Expect(err).ToNot(HaveOccurred())
|
|
block, err := gossh.MarshalPrivateKeyWithPassphrase(priv, "test ed25519 key", []byte("pw"))
|
|
g.Expect(err).ToNot(HaveOccurred())
|
|
pemBytes := pem.EncodeToMemory(block)
|
|
|
|
b := &PlainGitBootstrapper{sshSigningKey: pemBytes}
|
|
_, err = b.resolveSigner()
|
|
g.Expect(err).To(HaveOccurred())
|
|
})
|
|
|
|
t.Run("GPG path takes precedence over SSH path", func(t *testing.T) {
|
|
g := NewWithT(t)
|
|
entity, err := openpgp.NewEntity("Alice", "test", "alice@example.com", nil)
|
|
g.Expect(err).ToNot(HaveOccurred())
|
|
b := &PlainGitBootstrapper{
|
|
gpgKeyRing: openpgp.EntityList{entity},
|
|
sshSigningKey: []byte("ignored"),
|
|
}
|
|
signer, err := b.resolveSigner()
|
|
g.Expect(err).ToNot(HaveOccurred())
|
|
g.Expect(signer).ToNot(BeNil())
|
|
})
|
|
}
|
|
|
|
// TestPlainGitBootstrapper_sshSignerProducesVerifiableCommit is an
|
|
// end-to-end wiring test. resolveSigner already has unit tests for
|
|
// dispatch behaviour, but nothing in pkg/bootstrap exercises the full
|
|
// path from sshSigningKey → resolveSigner → repository.WithSigner →
|
|
// gogit.Client.Commit → gpgsig header on the resulting commit object.
|
|
// This test drives that path and then verifies the signature via
|
|
// signature.VerifySSHSignature, catching regressions that the existing
|
|
// dispatcher unit tests would miss.
|
|
func TestPlainGitBootstrapper_sshSignerProducesVerifiableCommit(t *testing.T) {
|
|
g := NewWithT(t)
|
|
|
|
// Generate an ed25519 keypair and marshal the private key to PEM.
|
|
pub, priv, err := ed25519.GenerateKey(rand.Reader)
|
|
g.Expect(err).ToNot(HaveOccurred())
|
|
pemBlock, err := gossh.MarshalPrivateKey(priv, "test ed25519 key")
|
|
g.Expect(err).ToNot(HaveOccurred())
|
|
pemBytes := pem.EncodeToMemory(pemBlock)
|
|
|
|
// Resolve a Signer via the same path the bootstrap commit code uses.
|
|
b := &PlainGitBootstrapper{sshSigningKey: pemBytes}
|
|
signer, err := b.resolveSigner()
|
|
g.Expect(err).ToNot(HaveOccurred())
|
|
g.Expect(signer).ToNot(BeNil())
|
|
|
|
// Initialise a gogit.Client against a fresh on-disk repo. Init sets
|
|
// the internal repository pointer so that Commit can operate.
|
|
tmp := t.TempDir()
|
|
gogitClient, err := gogit.NewClient(tmp, nil)
|
|
g.Expect(err).ToNot(HaveOccurred())
|
|
// Use a file:// URL; Init only records the remote URL, it does not
|
|
// actually connect, so any syntactically valid URL works here.
|
|
g.Expect(gogitClient.Init(context.Background(), "file:///dev/null", git.DefaultBranch)).To(Succeed())
|
|
|
|
// Drive a commit through the same gogit pipeline bootstrap uses.
|
|
hash, err := gogitClient.Commit(
|
|
git.Commit{
|
|
Author: git.Signature{Name: "Test", Email: "test@example.com"},
|
|
Message: "ssh-signed test commit",
|
|
},
|
|
repository.WithFiles(map[string]io.Reader{
|
|
"signed-file": strings.NewReader("hello sshsig"),
|
|
}),
|
|
repository.WithSigner(signer),
|
|
)
|
|
g.Expect(err).ToNot(HaveOccurred())
|
|
|
|
// Read the commit object back via a plain go-git open of the same path.
|
|
repo, err := extgogit.PlainOpen(tmp)
|
|
g.Expect(err).ToNot(HaveOccurred())
|
|
commit, err := repo.CommitObject(plumbing.NewHash(hash))
|
|
g.Expect(err).ToNot(HaveOccurred())
|
|
|
|
// The commit must carry an SSH signature header.
|
|
g.Expect(commit.PGPSignature).To(HavePrefix("-----BEGIN SSH SIGNATURE-----"))
|
|
|
|
// Reconstruct the canonical payload (commit without signature) and
|
|
// run the full cryptographic verification against the known public key.
|
|
encoded := &plumbing.MemoryObject{}
|
|
g.Expect(commit.EncodeWithoutSignature(encoded)).To(Succeed())
|
|
payloadReader, err := encoded.Reader()
|
|
g.Expect(err).ToNot(HaveOccurred())
|
|
payload, err := io.ReadAll(payloadReader)
|
|
g.Expect(err).ToNot(HaveOccurred())
|
|
|
|
gosshPub, err := gossh.NewPublicKey(pub)
|
|
g.Expect(err).ToNot(HaveOccurred())
|
|
authorizedKey := gossh.MarshalAuthorizedKey(gosshPub)
|
|
|
|
_, err = signature.VerifySSHSignature(commit.PGPSignature, payload, string(authorizedKey))
|
|
g.Expect(err).ToNot(HaveOccurred())
|
|
}
|