mirror of
https://github.com/edgelesssys/constellation.git
synced 2024-12-25 07:29:38 -05:00
747 lines
17 KiB
Go
747 lines
17 KiB
Go
/*
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Copyright (c) Edgeless Systems GmbH
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SPDX-License-Identifier: AGPL-3.0-only
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*/
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package installer
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import (
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"archive/tar"
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"bufio"
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"bytes"
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"compress/gzip"
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"context"
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"errors"
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"io"
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"io/fs"
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"net"
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"net/http"
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"net/http/httptest"
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"path"
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"sync"
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"testing"
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"time"
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"github.com/edgelesssys/constellation/v2/internal/versions/components"
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"github.com/spf13/afero"
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"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/require"
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"google.golang.org/grpc/test/bufconn"
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testclock "k8s.io/utils/clock/testing"
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)
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func TestInstall(t *testing.T) {
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serverURL := "http://server/path"
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testCases := map[string]struct {
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server httpBufconnServer
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component components.Component
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hash string
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destination string
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extract bool
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wantErr bool
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wantFiles map[string][]byte
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}{
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"download works": {
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server: newHTTPBufconnServerWithBody([]byte("file-contents")),
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component: components.Component{
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URL: serverURL,
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Hash: "sha256:f03779b36bece74893fd6533a67549675e21573eb0e288d87158738f9c24594e",
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InstallPath: "/destination",
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},
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wantFiles: map[string][]byte{"/destination": []byte("file-contents")},
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},
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"download with extract works": {
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server: newHTTPBufconnServerWithBody(createTarGz([]byte("file-contents"), "/destination")),
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component: components.Component{
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URL: serverURL,
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Hash: "sha256:a52a1664ca0a6ec9790384e3d058852ab8b3a8f389a9113d150fdc6ab308d949",
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InstallPath: "/prefix",
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Extract: true,
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},
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wantFiles: map[string][]byte{"/prefix/destination": []byte("file-contents")},
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},
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"hash validation fails": {
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server: newHTTPBufconnServerWithBody([]byte("file-contents")),
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component: components.Component{
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URL: serverURL,
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Hash: "sha256:abc",
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InstallPath: "/destination",
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},
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wantErr: true,
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},
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"download fails": {
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server: newHTTPBufconnServer(func(w http.ResponseWriter, r *http.Request) { w.WriteHeader(500) }),
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component: components.Component{
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URL: serverURL,
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Hash: "sha256:abc",
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InstallPath: "/destination",
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},
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wantErr: true,
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},
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}
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for name, tc := range testCases {
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t.Run(name, func(t *testing.T) {
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assert := assert.New(t)
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require := require.New(t)
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defer tc.server.Close()
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hClient := http.Client{
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Transport: &http.Transport{
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DialContext: tc.server.DialContext,
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Dial: tc.server.Dial,
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DialTLSContext: tc.server.DialContext,
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DialTLS: tc.server.Dial,
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},
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}
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// This test was written before retriability was added to Install. It makes sense to test Install as if it wouldn't retry requests.
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inst := OsInstaller{
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fs: &afero.Afero{Fs: afero.NewMemMapFs()},
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hClient: &hClient,
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clock: testclock.NewFakeClock(time.Time{}),
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retriable: func(err error) bool { return false },
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}
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err := inst.Install(context.Background(), tc.component)
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if tc.wantErr {
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assert.Error(err)
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return
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}
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require.NoError(err)
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for path, wantContents := range tc.wantFiles {
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contents, err := inst.fs.ReadFile(path)
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assert.NoError(err)
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assert.Equal(wantContents, contents)
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}
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})
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}
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}
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func TestExtractArchive(t *testing.T) {
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tarGzTestFile := createTarGz([]byte("file-contents"), "/destination")
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tarGzTestWithFolder := createTarGzWithFolder([]byte("file-contents"), "/folder/destination", nil)
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testCases := map[string]struct {
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source string
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destination string
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contents []byte
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readonly bool
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wantErr bool
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wantFiles map[string][]byte
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}{
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"extract works": {
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source: "in.tar.gz",
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destination: "/prefix",
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contents: tarGzTestFile,
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wantFiles: map[string][]byte{
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"/prefix/destination": []byte("file-contents"),
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},
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},
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"extract with folder works": {
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source: "in.tar.gz",
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destination: "/prefix",
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contents: tarGzTestWithFolder,
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wantFiles: map[string][]byte{
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"/prefix/folder/destination": []byte("file-contents"),
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},
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},
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"source missing": {
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source: "in.tar.gz",
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destination: "/prefix",
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wantErr: true,
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},
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"non-gzip file contents": {
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source: "in.tar.gz",
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contents: []byte("invalid bytes"),
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destination: "/prefix",
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wantErr: true,
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},
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"non-tar file contents": {
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source: "in.tar.gz",
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contents: createGz([]byte("file-contents")),
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destination: "/prefix",
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wantErr: true,
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},
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"mkdir prefix dir fails on RO fs": {
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source: "in.tar.gz",
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contents: tarGzTestFile,
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destination: "/prefix",
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readonly: true,
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wantErr: true,
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},
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"mkdir tar dir fails on RO fs": {
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source: "in.tar.gz",
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contents: tarGzTestWithFolder,
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destination: "/",
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readonly: true,
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wantErr: true,
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},
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"writing tar file fails on RO fs": {
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source: "in.tar.gz",
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contents: tarGzTestFile,
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destination: "/",
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readonly: true,
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wantErr: true,
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},
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"symlink can be detected (but is unsupported on memmapfs)": {
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source: "in.tar.gz",
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contents: createTarGzWithSymlink("source", "dest"),
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destination: "/prefix",
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wantErr: true,
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},
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"unsupported tar header type is detected": {
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source: "in.tar.gz",
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contents: createTarGzWithFifo("/destination"),
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destination: "/prefix",
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wantErr: true,
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},
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"path traversal is detected": {
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source: "in.tar.gz",
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contents: createTarGz([]byte{}, "../destination"),
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wantErr: true,
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},
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"path traversal in symlink is detected": {
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source: "in.tar.gz",
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contents: createTarGzWithSymlink("/source", "../destination"),
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wantErr: true,
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},
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"empty file name is detected": {
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source: "in.tar.gz",
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contents: createTarGz([]byte{}, ""),
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wantErr: true,
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},
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"empty folder name is detected": {
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source: "in.tar.gz",
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contents: createTarGzWithFolder([]byte{}, "source", stringPtr("")),
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wantErr: true,
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},
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"empty symlink source is detected": {
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source: "in.tar.gz",
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contents: createTarGzWithSymlink("", "/target"),
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wantErr: true,
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},
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"empty symlink target is detected": {
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source: "in.tar.gz",
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contents: createTarGzWithSymlink("/source", ""),
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wantErr: true,
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},
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}
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for name, tc := range testCases {
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t.Run(name, func(t *testing.T) {
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assert := assert.New(t)
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require := require.New(t)
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afs := afero.NewMemMapFs()
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if len(tc.source) > 0 && len(tc.contents) > 0 {
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require.NoError(afero.WriteFile(afs, tc.source, tc.contents, fs.ModePerm))
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}
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if tc.readonly {
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afs = afero.NewReadOnlyFs(afs)
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}
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inst := OsInstaller{
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fs: &afero.Afero{Fs: afs},
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}
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err := inst.extractArchive(tc.source, tc.destination, fs.ModePerm)
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if tc.wantErr {
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assert.Error(err)
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return
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}
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require.NoError(err)
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for path, wantContents := range tc.wantFiles {
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contents, err := inst.fs.ReadFile(path)
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assert.NoError(err)
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assert.Equal(wantContents, contents)
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}
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})
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}
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}
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func TestRetryDownloadToTempDir(t *testing.T) {
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testCases := map[string]struct {
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responses []int
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cancelCtx bool
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wantErr bool
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wantFile []byte
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}{
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"Succeed on third try": {
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responses: []int{500, 500, 200},
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wantFile: []byte("file-content"),
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},
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"Cancel after second try": {
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responses: []int{500, 500},
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cancelCtx: true,
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wantErr: true,
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},
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}
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for name, tc := range testCases {
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t.Run(name, func(t *testing.T) {
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assert := assert.New(t)
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require := require.New(t)
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// control the server's responses through stateCh
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stateCh := make(chan int)
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server := newHTTPBufconnServerWithState(stateCh, tc.wantFile)
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defer server.Close()
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hClient := http.Client{
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Transport: &http.Transport{
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DialContext: server.DialContext,
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Dial: server.Dial,
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DialTLSContext: server.DialContext,
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DialTLS: server.Dial,
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},
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}
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afs := afero.NewMemMapFs()
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// control download retries through FakeClock clock
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clock := testclock.NewFakeClock(time.Now())
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inst := OsInstaller{
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fs: &afero.Afero{Fs: afs},
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hClient: &hClient,
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clock: clock,
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retriable: func(error) bool { return true },
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}
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// abort retryDownloadToTempDir in some test cases by using the context
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ctx, cancel := context.WithCancel(context.Background())
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defer cancel()
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wg := sync.WaitGroup{}
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var downloadErr error
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var path string
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wg.Add(1)
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go func() {
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defer wg.Done()
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path, downloadErr = inst.retryDownloadToTempDir(ctx, "http://server/path")
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}()
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// control the server's responses through stateCh.
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for _, resp := range tc.responses {
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stateCh <- resp
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clock.Step(downloadInterval)
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}
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if tc.cancelCtx {
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cancel()
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}
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wg.Wait()
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if tc.wantErr {
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assert.Error(downloadErr)
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return
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}
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require.NoError(downloadErr)
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content, err := inst.fs.ReadFile(path)
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assert.NoError(err)
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assert.Equal(tc.wantFile, content)
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})
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}
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}
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func TestDownloadToTempDir(t *testing.T) {
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testCases := map[string]struct {
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server httpBufconnServer
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readonly bool
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wantErr bool
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wantFile []byte
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}{
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"download works": {
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server: newHTTPBufconnServerWithBody([]byte("file-contents")),
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wantFile: []byte("file-contents"),
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},
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"download fails": {
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server: newHTTPBufconnServer(func(w http.ResponseWriter, r *http.Request) { w.WriteHeader(500) }),
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wantErr: true,
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},
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"creating temp file fails on RO fs": {
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server: newHTTPBufconnServerWithBody([]byte("file-contents")),
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readonly: true,
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wantErr: true,
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},
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"content length mismatch": {
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server: newHTTPBufconnServer(func(writer http.ResponseWriter, request *http.Request) {
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writer.Header().Set("Content-Length", "1337")
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writer.WriteHeader(200)
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}),
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wantErr: true,
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},
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}
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for name, tc := range testCases {
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t.Run(name, func(t *testing.T) {
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assert := assert.New(t)
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require := require.New(t)
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defer tc.server.Close()
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hClient := http.Client{
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Transport: &http.Transport{
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DialContext: tc.server.DialContext,
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Dial: tc.server.Dial,
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DialTLSContext: tc.server.DialContext,
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DialTLS: tc.server.Dial,
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},
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}
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afs := afero.NewMemMapFs()
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if tc.readonly {
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afs = afero.NewReadOnlyFs(afs)
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}
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inst := OsInstaller{
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fs: &afero.Afero{Fs: afs},
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hClient: &hClient,
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}
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path, err := inst.downloadToTempDir(context.Background(), "http://server/path")
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if tc.wantErr {
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assert.Error(err)
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return
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}
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require.NoError(err)
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contents, err := inst.fs.ReadFile(path)
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assert.NoError(err)
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assert.Equal(tc.wantFile, contents)
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})
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}
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}
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func TestCopy(t *testing.T) {
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contents := []byte("file-contents")
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existingFile := "/source"
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testCases := map[string]struct {
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oldname string
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newname string
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perm fs.FileMode
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readonly bool
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wantErr bool
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}{
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"copy works": {
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oldname: existingFile,
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newname: "/destination",
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perm: fs.ModePerm,
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},
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"oldname does not exist": {
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oldname: "missing",
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newname: "/destination",
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wantErr: true,
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},
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"copy on readonly fs fails": {
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oldname: existingFile,
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newname: "/destination",
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perm: fs.ModePerm,
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},
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}
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for name, tc := range testCases {
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t.Run(name, func(t *testing.T) {
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assert := assert.New(t)
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require := require.New(t)
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afs := afero.NewMemMapFs()
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require.NoError(afero.WriteFile(afs, existingFile, contents, fs.ModePerm))
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if tc.readonly {
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afs = afero.NewReadOnlyFs(afs)
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}
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inst := OsInstaller{fs: &afero.Afero{Fs: afs}}
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err := inst.copy(tc.oldname, tc.newname, tc.perm)
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if tc.wantErr {
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assert.Error(err)
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return
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}
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require.NoError(err)
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oldfile, err := afs.Open(tc.oldname)
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assert.NoError(err)
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newfile, err := afs.Open(tc.newname)
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assert.NoError(err)
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oldContents, _ := io.ReadAll(oldfile)
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newContents, _ := io.ReadAll(newfile)
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assert.Equal(oldContents, newContents)
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newStat, _ := newfile.Stat()
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assert.Equal(tc.perm, newStat.Mode())
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})
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}
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}
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|
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func TestVerifyTarPath(t *testing.T) {
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testCases := map[string]struct {
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path string
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wantErr bool
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}{
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"valid relative path": {
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path: "a/b/c",
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},
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"valid absolute path": {
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path: "/a/b/c",
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},
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"valid path with dot": {
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path: "/a/b/.d",
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},
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"valid path with dots": {
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path: "/a/b/..d",
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},
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"single dot in path is allowed": {
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path: ".",
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},
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"simple path traversal": {
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path: "..",
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wantErr: true,
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},
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"simple path traversal 2": {
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path: "../",
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wantErr: true,
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},
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"simple path traversal 3": {
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path: "/..",
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wantErr: true,
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},
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"simple path traversal 4": {
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path: "/../",
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wantErr: true,
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},
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|
"complex relative path traversal": {
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path: "a/b/c/../../../../c/d/e",
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wantErr: true,
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},
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"complex absolute path traversal": {
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path: "/a/b/c/../../../../c/d/e",
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wantErr: true,
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},
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"path traversal at the end": {
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path: "a/..",
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wantErr: true,
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},
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"path traversal at the end with trailing /": {
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path: "a/../",
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wantErr: true,
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},
|
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}
|
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|
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for name, tc := range testCases {
|
|
t.Run(name, func(t *testing.T) {
|
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assert := assert.New(t)
|
|
require := require.New(t)
|
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|
|
err := verifyTarPath(tc.path)
|
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if tc.wantErr {
|
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assert.Error(err)
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return
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}
|
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require.NoError(err)
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|
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assert.Equal(tc.path, path.Clean(tc.path))
|
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})
|
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}
|
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}
|
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|
|
type httpBufconnServer struct {
|
|
*httptest.Server
|
|
*bufconn.Listener
|
|
}
|
|
|
|
func (s *httpBufconnServer) DialContext(ctx context.Context, _, _ string) (net.Conn, error) {
|
|
return s.Listener.DialContext(ctx)
|
|
}
|
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|
|
func (s *httpBufconnServer) Dial(_, _ string) (net.Conn, error) {
|
|
return s.Listener.Dial()
|
|
}
|
|
|
|
func (s *httpBufconnServer) Close() {
|
|
s.Server.Close()
|
|
s.Listener.Close()
|
|
}
|
|
|
|
func newHTTPBufconnServer(handlerFunc http.HandlerFunc) httpBufconnServer {
|
|
server := httptest.NewUnstartedServer(handlerFunc)
|
|
listener := bufconn.Listen(1024)
|
|
server.Listener = listener
|
|
server.Start()
|
|
return httpBufconnServer{
|
|
Server: server,
|
|
Listener: listener,
|
|
}
|
|
}
|
|
|
|
func newHTTPBufconnServerWithBody(body []byte) httpBufconnServer {
|
|
return newHTTPBufconnServer(func(writer http.ResponseWriter, request *http.Request) {
|
|
if _, err := writer.Write(body); err != nil {
|
|
panic(err)
|
|
}
|
|
})
|
|
}
|
|
|
|
func newHTTPBufconnServerWithState(state chan int, body []byte) httpBufconnServer {
|
|
return newHTTPBufconnServer(func(w http.ResponseWriter, r *http.Request) {
|
|
switch <-state {
|
|
case 500:
|
|
w.WriteHeader(500)
|
|
case 200:
|
|
if _, err := w.Write(body); err != nil {
|
|
panic(err)
|
|
}
|
|
default:
|
|
w.WriteHeader(402)
|
|
}
|
|
})
|
|
}
|
|
|
|
func createTarGz(contents []byte, path string) []byte {
|
|
tgzWriter := newTarGzWriter()
|
|
defer func() { _ = tgzWriter.Close() }()
|
|
|
|
if err := tgzWriter.writeHeader(&tar.Header{
|
|
Typeflag: tar.TypeReg,
|
|
Name: path,
|
|
Size: int64(len(contents)),
|
|
Mode: int64(fs.ModePerm),
|
|
}); err != nil {
|
|
panic(err)
|
|
}
|
|
if _, err := tgzWriter.writeTar(contents); err != nil {
|
|
panic(err)
|
|
}
|
|
|
|
return tgzWriter.Bytes()
|
|
}
|
|
|
|
func createTarGzWithFolder(contents []byte, pat string, dirnameOverride *string) []byte {
|
|
tgzWriter := newTarGzWriter()
|
|
defer func() { _ = tgzWriter.Close() }()
|
|
|
|
dir := path.Dir(pat)
|
|
if dirnameOverride != nil {
|
|
dir = *dirnameOverride
|
|
}
|
|
|
|
if err := tgzWriter.writeHeader(&tar.Header{
|
|
Typeflag: tar.TypeDir,
|
|
Name: dir,
|
|
Mode: int64(fs.ModePerm),
|
|
}); err != nil {
|
|
panic(err)
|
|
}
|
|
if err := tgzWriter.writeHeader(&tar.Header{
|
|
Typeflag: tar.TypeReg,
|
|
Name: pat,
|
|
Size: int64(len(contents)),
|
|
Mode: int64(fs.ModePerm),
|
|
}); err != nil {
|
|
panic(err)
|
|
}
|
|
if _, err := tgzWriter.writeTar(contents); err != nil {
|
|
panic(err)
|
|
}
|
|
|
|
return tgzWriter.Bytes()
|
|
}
|
|
|
|
func createTarGzWithSymlink(oldname, newname string) []byte {
|
|
tgzWriter := newTarGzWriter()
|
|
defer func() { _ = tgzWriter.Close() }()
|
|
|
|
if err := tgzWriter.writeHeader(&tar.Header{
|
|
Typeflag: tar.TypeSymlink,
|
|
Name: oldname,
|
|
Linkname: newname,
|
|
Mode: int64(fs.ModePerm),
|
|
}); err != nil {
|
|
panic(err)
|
|
}
|
|
|
|
return tgzWriter.Bytes()
|
|
}
|
|
|
|
func createTarGzWithFifo(name string) []byte {
|
|
tgzWriter := newTarGzWriter()
|
|
defer func() { _ = tgzWriter.Close() }()
|
|
|
|
if err := tgzWriter.writeHeader(&tar.Header{
|
|
Typeflag: tar.TypeFifo,
|
|
Name: name,
|
|
Mode: int64(fs.ModePerm),
|
|
}); err != nil {
|
|
panic(err)
|
|
}
|
|
|
|
return tgzWriter.Bytes()
|
|
}
|
|
|
|
func createGz(contents []byte) []byte {
|
|
tgzWriter := newTarGzWriter()
|
|
defer func() { _ = tgzWriter.Close() }()
|
|
|
|
if _, err := tgzWriter.writeGz(contents); err != nil {
|
|
panic(err)
|
|
}
|
|
|
|
return tgzWriter.Bytes()
|
|
}
|
|
|
|
type tarGzWriter struct {
|
|
buf *bytes.Buffer
|
|
bufWriter *bufio.Writer
|
|
gzWriter *gzip.Writer
|
|
tarWriter *tar.Writer
|
|
}
|
|
|
|
func newTarGzWriter() *tarGzWriter {
|
|
var buf bytes.Buffer
|
|
bufWriter := bufio.NewWriter(&buf)
|
|
gzipWriter := gzip.NewWriter(bufWriter)
|
|
tarWriter := tar.NewWriter(gzipWriter)
|
|
|
|
return &tarGzWriter{
|
|
buf: &buf,
|
|
bufWriter: bufWriter,
|
|
gzWriter: gzipWriter,
|
|
tarWriter: tarWriter,
|
|
}
|
|
}
|
|
|
|
func (w *tarGzWriter) writeHeader(hdr *tar.Header) error {
|
|
return w.tarWriter.WriteHeader(hdr)
|
|
}
|
|
|
|
func (w *tarGzWriter) writeTar(b []byte) (int, error) {
|
|
return w.tarWriter.Write(b)
|
|
}
|
|
|
|
func (w *tarGzWriter) writeGz(b []byte) (int, error) {
|
|
return w.gzWriter.Write(b)
|
|
}
|
|
|
|
func (w *tarGzWriter) Bytes() []byte {
|
|
_ = w.tarWriter.Flush()
|
|
_ = w.gzWriter.Flush()
|
|
_ = w.gzWriter.Close() // required to ensure clean EOF in gz reader
|
|
_ = w.bufWriter.Flush()
|
|
return w.buf.Bytes()
|
|
}
|
|
|
|
func (w *tarGzWriter) Close() (retErr error) {
|
|
retErr = errors.Join(retErr, w.tarWriter.Close())
|
|
retErr = errors.Join(retErr, w.gzWriter.Close())
|
|
return retErr
|
|
}
|
|
|
|
func stringPtr(s string) *string {
|
|
return &s
|
|
}
|