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moby--moby/integration-cli/docker_cli_by_digest_test.go
2020-02-11 00:06:42 +01:00

689 lines
25 KiB
Go

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/v3/assert"
is "gotest.tools/v3/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: <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 <name>@<digest> reference
imageReference := fmt.Sprintf("%s@%s", repoName, pushDigest)
out, _ := dockerCmd(c, "pull", imageReference)
// the pull output includes "Digest: <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 <name>@<digest> 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 <name>@<digest> 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 <name>@<digest> 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 <name>@<digest> 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 <name>@<digest> 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=<none>, digest = $digest1
re1 := regexp.MustCompile(`\s*` + repoName + `\s*<none>\s*` + digest1.String() + `\s`)
assert.Assert(c, re1.MatchString(out), "expected %q: %s", re1.String(), out)
// setup image2
digest2, err := setupImageWithTag(c, "tag2")
assert.NilError(c, err, "error setting up image")
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=<none>, digest = $digest1
assert.Assert(c, re1.MatchString(out), "expected %q: %s", re1.String(), out)
// make sure repo shown, tag=<none>, digest = $digest2
re2 := regexp.MustCompile(`\s*` + repoName + `\s*<none>\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, <none> AND repo, <none>, 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, <none>, 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*<none>\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=<none>, digest = $digest1
re1 := regexp.MustCompile(`\s*` + repoName + `\s*<none>\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=<none>, digest = $digest1
assert.Assert(c, re1.MatchString(out), "expected %q: %s", re1.String(), out)
// make sure repo shown, tag=<none>, digest = $digest2
re2 := regexp.MustCompile(`\s*` + repoName + `\s*<none>\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, <none> AND repo, <none>, 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, <none>, 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 <name>@<digest> 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 <name>@<digest> 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 <name>@<digest> 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 <name>@<digest> 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 <name>@<digest> 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 <name>@<digest> 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 <name>@<digest> 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 <name>@<digest> 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 <name>@<digest> 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)
}