package main import ( "encoding/json" "fmt" "os" "path/filepath" "regexp" "strings" "testing" "github.com/docker/distribution/manifest/schema1" "github.com/docker/distribution/manifest/schema2" "github.com/docker/docker/api/types" "github.com/docker/docker/integration-cli/cli" "github.com/docker/docker/integration-cli/cli/build" digest "github.com/opencontainers/go-digest" "gotest.tools/assert" is "gotest.tools/assert/cmp" ) var ( remoteRepoName = "dockercli/busybox-by-dgst" repoName = fmt.Sprintf("%s/%s", privateRegistryURL, remoteRepoName) pushDigestRegex = regexp.MustCompile(`[\S]+: digest: ([\S]+) size: [0-9]+`) digestRegex = regexp.MustCompile(`Digest: ([\S]+)`) ) func setupImage(c *testing.T) (digest.Digest, error) { return setupImageWithTag(c, "latest") } func setupImageWithTag(c *testing.T, tag string) (digest.Digest, error) { containerName := "busyboxbydigest" // new file is committed because this layer is used for detecting malicious // changes. if this was committed as empty layer it would be skipped on pull // and malicious changes would never be detected. cli.DockerCmd(c, "run", "-e", "digest=1", "--name", containerName, "busybox", "touch", "anewfile") // tag the image to upload it to the private registry repoAndTag := repoName + ":" + tag cli.DockerCmd(c, "commit", containerName, repoAndTag) // delete the container as we don't need it any more cli.DockerCmd(c, "rm", "-fv", containerName) // push the image out := cli.DockerCmd(c, "push", repoAndTag).Combined() // delete our local repo that we previously tagged cli.DockerCmd(c, "rmi", repoAndTag) matches := pushDigestRegex.FindStringSubmatch(out) assert.Equal(c, len(matches), 2, "unable to parse digest from push output: %s", out) pushDigest := matches[1] return digest.Digest(pushDigest), nil } func testPullByTagDisplaysDigest(c *testing.T) { testRequires(c, DaemonIsLinux) pushDigest, err := setupImage(c) assert.NilError(c, err, "error setting up image") // pull from the registry using the tag out, _ := dockerCmd(c, "pull", repoName) // the pull output includes "Digest: ", so find that matches := digestRegex.FindStringSubmatch(out) assert.Equal(c, len(matches), 2, "unable to parse digest from push output: %s", out) pullDigest := matches[1] // make sure the pushed and pull digests match assert.Equal(c, pushDigest.String(), pullDigest) } func (s *DockerRegistrySuite) TestPullByTagDisplaysDigest(c *testing.T) { testPullByTagDisplaysDigest(c) } func (s *DockerSchema1RegistrySuite) TestPullByTagDisplaysDigest(c *testing.T) { testPullByTagDisplaysDigest(c) } func testPullByDigest(c *testing.T) { testRequires(c, DaemonIsLinux) pushDigest, err := setupImage(c) assert.NilError(c, err, "error setting up image") // pull from the registry using the @ reference imageReference := fmt.Sprintf("%s@%s", repoName, pushDigest) out, _ := dockerCmd(c, "pull", imageReference) // the pull output includes "Digest: ", so find that matches := digestRegex.FindStringSubmatch(out) assert.Equal(c, len(matches), 2, "unable to parse digest from push output: %s", out) pullDigest := matches[1] // make sure the pushed and pull digests match assert.Equal(c, pushDigest.String(), pullDigest) } func (s *DockerRegistrySuite) TestPullByDigest(c *testing.T) { testPullByDigest(c) } func (s *DockerSchema1RegistrySuite) TestPullByDigest(c *testing.T) { testPullByDigest(c) } func testPullByDigestNoFallback(c *testing.T) { testRequires(c, DaemonIsLinux) // pull from the registry using the @ reference imageReference := fmt.Sprintf("%s@sha256:ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff", repoName) out, _, err := dockerCmdWithError("pull", imageReference) assert.Assert(c, err != nil, "expected non-zero exit status and correct error message when pulling non-existing image") assert.Assert(c, strings.Contains(out, fmt.Sprintf("manifest for %s not found", imageReference)), "expected non-zero exit status and correct error message when pulling non-existing image") } func (s *DockerRegistrySuite) TestPullByDigestNoFallback(c *testing.T) { testPullByDigestNoFallback(c) } func (s *DockerSchema1RegistrySuite) TestPullByDigestNoFallback(c *testing.T) { testPullByDigestNoFallback(c) } func (s *DockerRegistrySuite) TestCreateByDigest(c *testing.T) { pushDigest, err := setupImage(c) assert.NilError(c, err, "error setting up image") imageReference := fmt.Sprintf("%s@%s", repoName, pushDigest) containerName := "createByDigest" dockerCmd(c, "create", "--name", containerName, imageReference) res := inspectField(c, containerName, "Config.Image") assert.Equal(c, res, imageReference) } func (s *DockerRegistrySuite) TestRunByDigest(c *testing.T) { pushDigest, err := setupImage(c) assert.NilError(c, err) imageReference := fmt.Sprintf("%s@%s", repoName, pushDigest) containerName := "runByDigest" out, _ := dockerCmd(c, "run", "--name", containerName, imageReference, "sh", "-c", "echo found=$digest") foundRegex := regexp.MustCompile("found=([^\n]+)") matches := foundRegex.FindStringSubmatch(out) assert.Equal(c, len(matches), 2, fmt.Sprintf("unable to parse digest from pull output: %s", out)) assert.Equal(c, matches[1], "1", fmt.Sprintf("Expected %q, got %q", "1", matches[1])) res := inspectField(c, containerName, "Config.Image") assert.Equal(c, res, imageReference) } func (s *DockerRegistrySuite) TestRemoveImageByDigest(c *testing.T) { digest, err := setupImage(c) assert.NilError(c, err, "error setting up image") imageReference := fmt.Sprintf("%s@%s", repoName, digest) // pull from the registry using the @ reference dockerCmd(c, "pull", imageReference) // make sure inspect runs ok inspectField(c, imageReference, "Id") // do the delete err = deleteImages(imageReference) assert.NilError(c, err, "unexpected error deleting image") // try to inspect again - it should error this time _, err = inspectFieldWithError(imageReference, "Id") //unexpected nil err trying to inspect what should be a non-existent image assert.ErrorContains(c, err, "No such object") } func (s *DockerRegistrySuite) TestBuildByDigest(c *testing.T) { digest, err := setupImage(c) assert.NilError(c, err, "error setting up image") imageReference := fmt.Sprintf("%s@%s", repoName, digest) // pull from the registry using the @ reference dockerCmd(c, "pull", imageReference) // get the image id imageID := inspectField(c, imageReference, "Id") // do the build name := "buildbydigest" buildImageSuccessfully(c, name, build.WithDockerfile(fmt.Sprintf( `FROM %s CMD ["/bin/echo", "Hello World"]`, imageReference))) assert.NilError(c, err) // get the build's image id res := inspectField(c, name, "Config.Image") // make sure they match assert.Equal(c, res, imageID) } func (s *DockerRegistrySuite) TestTagByDigest(c *testing.T) { digest, err := setupImage(c) assert.NilError(c, err, "error setting up image") imageReference := fmt.Sprintf("%s@%s", repoName, digest) // pull from the registry using the @ reference dockerCmd(c, "pull", imageReference) // tag it tag := "tagbydigest" dockerCmd(c, "tag", imageReference, tag) expectedID := inspectField(c, imageReference, "Id") tagID := inspectField(c, tag, "Id") assert.Equal(c, tagID, expectedID) } func (s *DockerRegistrySuite) TestListImagesWithoutDigests(c *testing.T) { digest, err := setupImage(c) assert.NilError(c, err, "error setting up image") imageReference := fmt.Sprintf("%s@%s", repoName, digest) // pull from the registry using the @ reference dockerCmd(c, "pull", imageReference) out, _ := dockerCmd(c, "images") assert.Assert(c, !strings.Contains(out, "DIGEST"), "list output should not have contained DIGEST header") } func (s *DockerRegistrySuite) TestListImagesWithDigests(c *testing.T) { // setup image1 digest1, err := setupImageWithTag(c, "tag1") assert.NilError(c, err, "error setting up image") imageReference1 := fmt.Sprintf("%s@%s", repoName, digest1) c.Logf("imageReference1 = %s", imageReference1) // pull image1 by digest dockerCmd(c, "pull", imageReference1) // list images out, _ := dockerCmd(c, "images", "--digests") // make sure repo shown, tag=, digest = $digest1 re1 := regexp.MustCompile(`\s*` + repoName + `\s*\s*` + digest1.String() + `\s`) assert.Assert(c, re1.MatchString(out), "expected %q: %s", re1.String(), out) // setup image2 digest2, err := setupImageWithTag(c, "tag2") //error setting up image assert.NilError(c, err) imageReference2 := fmt.Sprintf("%s@%s", repoName, digest2) c.Logf("imageReference2 = %s", imageReference2) // pull image1 by digest dockerCmd(c, "pull", imageReference1) // pull image2 by digest dockerCmd(c, "pull", imageReference2) // list images out, _ = dockerCmd(c, "images", "--digests") // make sure repo shown, tag=, digest = $digest1 assert.Assert(c, re1.MatchString(out), "expected %q: %s", re1.String(), out) // make sure repo shown, tag=, digest = $digest2 re2 := regexp.MustCompile(`\s*` + repoName + `\s*\s*` + digest2.String() + `\s`) assert.Assert(c, re2.MatchString(out), "expected %q: %s", re2.String(), out) // pull tag1 dockerCmd(c, "pull", repoName+":tag1") // list images out, _ = dockerCmd(c, "images", "--digests") // make sure image 1 has repo, tag, AND repo, , digest reWithDigest1 := regexp.MustCompile(`\s*` + repoName + `\s*tag1\s*` + digest1.String() + `\s`) assert.Assert(c, reWithDigest1.MatchString(out), "expected %q: %s", reWithDigest1.String(), out) // make sure image 2 has repo, , digest assert.Assert(c, re2.MatchString(out), "expected %q: %s", re2.String(), out) // pull tag 2 dockerCmd(c, "pull", repoName+":tag2") // list images out, _ = dockerCmd(c, "images", "--digests") // make sure image 1 has repo, tag, digest assert.Assert(c, reWithDigest1.MatchString(out), "expected %q: %s", reWithDigest1.String(), out) // make sure image 2 has repo, tag, digest reWithDigest2 := regexp.MustCompile(`\s*` + repoName + `\s*tag2\s*` + digest2.String() + `\s`) assert.Assert(c, reWithDigest2.MatchString(out), "expected %q: %s", reWithDigest2.String(), out) // list images out, _ = dockerCmd(c, "images", "--digests") // make sure image 1 has repo, tag, digest assert.Assert(c, reWithDigest1.MatchString(out), "expected %q: %s", reWithDigest1.String(), out) // make sure image 2 has repo, tag, digest assert.Assert(c, reWithDigest2.MatchString(out), "expected %q: %s", reWithDigest2.String(), out) // make sure busybox has tag, but not digest busyboxRe := regexp.MustCompile(`\s*busybox\s*latest\s*\s`) assert.Assert(c, busyboxRe.MatchString(out), "expected %q: %s", busyboxRe.String(), out) } func (s *DockerRegistrySuite) TestListDanglingImagesWithDigests(c *testing.T) { // setup image1 digest1, err := setupImageWithTag(c, "dangle1") assert.NilError(c, err, "error setting up image") imageReference1 := fmt.Sprintf("%s@%s", repoName, digest1) c.Logf("imageReference1 = %s", imageReference1) // pull image1 by digest dockerCmd(c, "pull", imageReference1) // list images out, _ := dockerCmd(c, "images", "--digests") // make sure repo shown, tag=, digest = $digest1 re1 := regexp.MustCompile(`\s*` + repoName + `\s*\s*` + digest1.String() + `\s`) assert.Assert(c, re1.MatchString(out), "expected %q: %s", re1.String(), out) // setup image2 digest2, err := setupImageWithTag(c, "dangle2") //error setting up image assert.NilError(c, err) imageReference2 := fmt.Sprintf("%s@%s", repoName, digest2) c.Logf("imageReference2 = %s", imageReference2) // pull image1 by digest dockerCmd(c, "pull", imageReference1) // pull image2 by digest dockerCmd(c, "pull", imageReference2) // list images out, _ = dockerCmd(c, "images", "--digests", "--filter=dangling=true") // make sure repo shown, tag=, digest = $digest1 assert.Assert(c, re1.MatchString(out), "expected %q: %s", re1.String(), out) // make sure repo shown, tag=, digest = $digest2 re2 := regexp.MustCompile(`\s*` + repoName + `\s*\s*` + digest2.String() + `\s`) assert.Assert(c, re2.MatchString(out), "expected %q: %s", re2.String(), out) // pull dangle1 tag dockerCmd(c, "pull", repoName+":dangle1") // list images out, _ = dockerCmd(c, "images", "--digests", "--filter=dangling=true") // make sure image 1 has repo, tag, AND repo, , digest reWithDigest1 := regexp.MustCompile(`\s*` + repoName + `\s*dangle1\s*` + digest1.String() + `\s`) assert.Assert(c, !reWithDigest1.MatchString(out), "unexpected %q: %s", reWithDigest1.String(), out) // make sure image 2 has repo, , digest assert.Assert(c, re2.MatchString(out), "expected %q: %s", re2.String(), out) // pull dangle2 tag dockerCmd(c, "pull", repoName+":dangle2") // list images, show tagged images out, _ = dockerCmd(c, "images", "--digests") // make sure image 1 has repo, tag, digest assert.Assert(c, reWithDigest1.MatchString(out), "expected %q: %s", reWithDigest1.String(), out) // make sure image 2 has repo, tag, digest reWithDigest2 := regexp.MustCompile(`\s*` + repoName + `\s*dangle2\s*` + digest2.String() + `\s`) assert.Assert(c, reWithDigest2.MatchString(out), "expected %q: %s", reWithDigest2.String(), out) // list images, no longer dangling, should not match out, _ = dockerCmd(c, "images", "--digests", "--filter=dangling=true") // make sure image 1 has repo, tag, digest assert.Assert(c, !reWithDigest1.MatchString(out), "unexpected %q: %s", reWithDigest1.String(), out) // make sure image 2 has repo, tag, digest assert.Assert(c, !reWithDigest2.MatchString(out), "unexpected %q: %s", reWithDigest2.String(), out) } func (s *DockerRegistrySuite) TestInspectImageWithDigests(c *testing.T) { digest, err := setupImage(c) assert.Assert(c, err == nil, "error setting up image") imageReference := fmt.Sprintf("%s@%s", repoName, digest) // pull from the registry using the @ reference dockerCmd(c, "pull", imageReference) out, _ := dockerCmd(c, "inspect", imageReference) var imageJSON []types.ImageInspect err = json.Unmarshal([]byte(out), &imageJSON) assert.NilError(c, err) assert.Equal(c, len(imageJSON), 1) assert.Equal(c, len(imageJSON[0].RepoDigests), 1) assert.Check(c, is.Contains(imageJSON[0].RepoDigests, imageReference)) } func (s *DockerRegistrySuite) TestPsListContainersFilterAncestorImageByDigest(c *testing.T) { existingContainers := ExistingContainerIDs(c) digest, err := setupImage(c) assert.NilError(c, err, "error setting up image") imageReference := fmt.Sprintf("%s@%s", repoName, digest) // pull from the registry using the @ reference dockerCmd(c, "pull", imageReference) // build an image from it imageName1 := "images_ps_filter_test" buildImageSuccessfully(c, imageName1, build.WithDockerfile(fmt.Sprintf( `FROM %s LABEL match me 1`, imageReference))) // run a container based on that dockerCmd(c, "run", "--name=test1", imageReference, "echo", "hello") expectedID := getIDByName(c, "test1") // run a container based on the a descendant of that too dockerCmd(c, "run", "--name=test2", imageName1, "echo", "hello") expectedID1 := getIDByName(c, "test2") expectedIDs := []string{expectedID, expectedID1} // Invalid imageReference out, _ := dockerCmd(c, "ps", "-a", "-q", "--no-trunc", fmt.Sprintf("--filter=ancestor=busybox@%s", digest)) assert.Equal(c, strings.TrimSpace(out), "", "Filter container for ancestor filter should be empty") // Valid imageReference out, _ = dockerCmd(c, "ps", "-a", "-q", "--no-trunc", "--filter=ancestor="+imageReference) checkPsAncestorFilterOutput(c, RemoveOutputForExistingElements(out, existingContainers), imageReference, expectedIDs) } func (s *DockerRegistrySuite) TestDeleteImageByIDOnlyPulledByDigest(c *testing.T) { pushDigest, err := setupImage(c) assert.NilError(c, err, "error setting up image") // pull from the registry using the @ reference imageReference := fmt.Sprintf("%s@%s", repoName, pushDigest) dockerCmd(c, "pull", imageReference) // just in case... dockerCmd(c, "tag", imageReference, repoName+":sometag") imageID := inspectField(c, imageReference, "Id") dockerCmd(c, "rmi", imageID) _, err = inspectFieldWithError(imageID, "Id") assert.ErrorContains(c, err, "", "image should have been deleted") } func (s *DockerRegistrySuite) TestDeleteImageWithDigestAndTag(c *testing.T) { pushDigest, err := setupImage(c) assert.NilError(c, err, "error setting up image") // pull from the registry using the @ reference imageReference := fmt.Sprintf("%s@%s", repoName, pushDigest) dockerCmd(c, "pull", imageReference) imageID := inspectField(c, imageReference, "Id") repoTag := repoName + ":sometag" repoTag2 := repoName + ":othertag" dockerCmd(c, "tag", imageReference, repoTag) dockerCmd(c, "tag", imageReference, repoTag2) dockerCmd(c, "rmi", repoTag2) // rmi should have deleted only repoTag2, because there's another tag inspectField(c, repoTag, "Id") dockerCmd(c, "rmi", repoTag) // rmi should have deleted the tag, the digest reference, and the image itself _, err = inspectFieldWithError(imageID, "Id") assert.ErrorContains(c, err, "", "image should have been deleted") } func (s *DockerRegistrySuite) TestDeleteImageWithDigestAndMultiRepoTag(c *testing.T) { pushDigest, err := setupImage(c) assert.NilError(c, err, "error setting up image") repo2 := fmt.Sprintf("%s/%s", repoName, "repo2") // pull from the registry using the @ reference imageReference := fmt.Sprintf("%s@%s", repoName, pushDigest) dockerCmd(c, "pull", imageReference) imageID := inspectField(c, imageReference, "Id") repoTag := repoName + ":sometag" repoTag2 := repo2 + ":othertag" dockerCmd(c, "tag", imageReference, repoTag) dockerCmd(c, "tag", imageReference, repoTag2) dockerCmd(c, "rmi", repoTag) // rmi should have deleted repoTag and image reference, but left repoTag2 inspectField(c, repoTag2, "Id") _, err = inspectFieldWithError(imageReference, "Id") assert.ErrorContains(c, err, "", "image digest reference should have been removed") _, err = inspectFieldWithError(repoTag, "Id") assert.ErrorContains(c, err, "", "image tag reference should have been removed") dockerCmd(c, "rmi", repoTag2) // rmi should have deleted the tag, the digest reference, and the image itself _, err = inspectFieldWithError(imageID, "Id") assert.ErrorContains(c, err, "", "image should have been deleted") } // TestPullFailsWithAlteredManifest tests that a `docker pull` fails when // we have modified a manifest blob and its digest cannot be verified. // This is the schema2 version of the test. func (s *DockerRegistrySuite) TestPullFailsWithAlteredManifest(c *testing.T) { testRequires(c, DaemonIsLinux) manifestDigest, err := setupImage(c) assert.NilError(c, err, "error setting up image") // Load the target manifest blob. manifestBlob := s.reg.ReadBlobContents(c, manifestDigest) var imgManifest schema2.Manifest err = json.Unmarshal(manifestBlob, &imgManifest) assert.NilError(c, err, "unable to decode image manifest from blob") // Change a layer in the manifest. imgManifest.Layers[0].Digest = digest.Digest("sha256:0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef") // Move the existing data file aside, so that we can replace it with a // malicious blob of data. NOTE: we defer the returned undo func. undo := s.reg.TempMoveBlobData(c, manifestDigest) defer undo() alteredManifestBlob, err := json.MarshalIndent(imgManifest, "", " ") assert.NilError(c, err, "unable to encode altered image manifest to JSON") s.reg.WriteBlobContents(c, manifestDigest, alteredManifestBlob) // Now try pulling that image by digest. We should get an error about // digest verification for the manifest digest. // Pull from the registry using the @ reference. imageReference := fmt.Sprintf("%s@%s", repoName, manifestDigest) out, exitStatus, _ := dockerCmdWithError("pull", imageReference) assert.Assert(c, exitStatus != 0) expectedErrorMsg := fmt.Sprintf("manifest verification failed for digest %s", manifestDigest) assert.Assert(c, is.Contains(out, expectedErrorMsg)) } // TestPullFailsWithAlteredManifest tests that a `docker pull` fails when // we have modified a manifest blob and its digest cannot be verified. // This is the schema1 version of the test. func (s *DockerSchema1RegistrySuite) TestPullFailsWithAlteredManifest(c *testing.T) { testRequires(c, DaemonIsLinux) manifestDigest, err := setupImage(c) assert.Assert(c, err == nil, "error setting up image") // Load the target manifest blob. manifestBlob := s.reg.ReadBlobContents(c, manifestDigest) var imgManifest schema1.Manifest err = json.Unmarshal(manifestBlob, &imgManifest) assert.Assert(c, err == nil, "unable to decode image manifest from blob") // Change a layer in the manifest. imgManifest.FSLayers[0] = schema1.FSLayer{ BlobSum: digest.Digest("sha256:0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef"), } // Move the existing data file aside, so that we can replace it with a // malicious blob of data. NOTE: we defer the returned undo func. undo := s.reg.TempMoveBlobData(c, manifestDigest) defer undo() alteredManifestBlob, err := json.MarshalIndent(imgManifest, "", " ") assert.Assert(c, err == nil, "unable to encode altered image manifest to JSON") s.reg.WriteBlobContents(c, manifestDigest, alteredManifestBlob) // Now try pulling that image by digest. We should get an error about // digest verification for the manifest digest. // Pull from the registry using the @ reference. imageReference := fmt.Sprintf("%s@%s", repoName, manifestDigest) out, exitStatus, _ := dockerCmdWithError("pull", imageReference) assert.Assert(c, exitStatus != 0) expectedErrorMsg := fmt.Sprintf("image verification failed for digest %s", manifestDigest) assert.Assert(c, strings.Contains(out, expectedErrorMsg)) } // TestPullFailsWithAlteredLayer tests that a `docker pull` fails when // we have modified a layer blob and its digest cannot be verified. // This is the schema2 version of the test. func (s *DockerRegistrySuite) TestPullFailsWithAlteredLayer(c *testing.T) { testRequires(c, DaemonIsLinux) manifestDigest, err := setupImage(c) assert.Assert(c, err == nil) // Load the target manifest blob. manifestBlob := s.reg.ReadBlobContents(c, manifestDigest) var imgManifest schema2.Manifest err = json.Unmarshal(manifestBlob, &imgManifest) assert.Assert(c, err == nil) // Next, get the digest of one of the layers from the manifest. targetLayerDigest := imgManifest.Layers[0].Digest // Move the existing data file aside, so that we can replace it with a // malicious blob of data. NOTE: we defer the returned undo func. undo := s.reg.TempMoveBlobData(c, targetLayerDigest) defer undo() // Now make a fake data blob in this directory. s.reg.WriteBlobContents(c, targetLayerDigest, []byte("This is not the data you are looking for.")) // Now try pulling that image by digest. We should get an error about // digest verification for the target layer digest. // Remove distribution cache to force a re-pull of the blobs if err := os.RemoveAll(filepath.Join(testEnv.DaemonInfo.DockerRootDir, "image", s.d.StorageDriver(), "distribution")); err != nil { c.Fatalf("error clearing distribution cache: %v", err) } // Pull from the registry using the @ reference. imageReference := fmt.Sprintf("%s@%s", repoName, manifestDigest) out, exitStatus, _ := dockerCmdWithError("pull", imageReference) assert.Assert(c, exitStatus != 0, "expected a non-zero exit status") expectedErrorMsg := fmt.Sprintf("filesystem layer verification failed for digest %s", targetLayerDigest) assert.Assert(c, strings.Contains(out, expectedErrorMsg), "expected error message in output: %s", out) } // TestPullFailsWithAlteredLayer tests that a `docker pull` fails when // we have modified a layer blob and its digest cannot be verified. // This is the schema1 version of the test. func (s *DockerSchema1RegistrySuite) TestPullFailsWithAlteredLayer(c *testing.T) { testRequires(c, DaemonIsLinux) manifestDigest, err := setupImage(c) assert.Assert(c, err == nil) // Load the target manifest blob. manifestBlob := s.reg.ReadBlobContents(c, manifestDigest) var imgManifest schema1.Manifest err = json.Unmarshal(manifestBlob, &imgManifest) assert.Assert(c, err == nil) // Next, get the digest of one of the layers from the manifest. targetLayerDigest := imgManifest.FSLayers[0].BlobSum // Move the existing data file aside, so that we can replace it with a // malicious blob of data. NOTE: we defer the returned undo func. undo := s.reg.TempMoveBlobData(c, targetLayerDigest) defer undo() // Now make a fake data blob in this directory. s.reg.WriteBlobContents(c, targetLayerDigest, []byte("This is not the data you are looking for.")) // Now try pulling that image by digest. We should get an error about // digest verification for the target layer digest. // Remove distribution cache to force a re-pull of the blobs if err := os.RemoveAll(filepath.Join(testEnv.DaemonInfo.DockerRootDir, "image", s.d.StorageDriver(), "distribution")); err != nil { c.Fatalf("error clearing distribution cache: %v", err) } // Pull from the registry using the @ reference. imageReference := fmt.Sprintf("%s@%s", repoName, manifestDigest) out, exitStatus, _ := dockerCmdWithError("pull", imageReference) assert.Assert(c, exitStatus != 0, "expected a non-zero exit status") expectedErrorMsg := fmt.Sprintf("filesystem layer verification failed for digest %s", targetLayerDigest) assert.Assert(c, strings.Contains(out, expectedErrorMsg), "expected error message in output: %s", out) }