package main
 
 import (

 	"encoding/json"

 	"fmt"
 	"regexp"
 	"strings"
 

 	"github.com/docker/distribution/digest"
 	"github.com/docker/distribution/manifest"

 	"github.com/docker/docker/api/types"
 	"github.com/docker/docker/pkg/stringutils"

 	"github.com/docker/docker/utils"

 	"github.com/go-check/check"

 )
 
 var (

 	remoteRepoName  = "dockercli/busybox-by-dgst"
 	repoName        = fmt.Sprintf("%v/%s", privateRegistryURL, remoteRepoName)

 	pushDigestRegex = regexp.MustCompile("[\\S]+: digest: ([\\S]+) size: [0-9]+")
 	digestRegex     = regexp.MustCompile("Digest: ([\\S]+)")

 )
 

 func setupImage(c *check.C) (digest.Digest, error) {

 	return setupImageWithTag(c, "latest")

 }
 

 func setupImageWithTag(c *check.C, tag string) (digest.Digest, error) {

 	containerName := "busyboxbydigest"
 

 	dockerCmd(c, "run", "-d", "-e", "digest=1", "--name", containerName, "busybox")

 
 	// tag the image to upload it to the private registry
 	repoAndTag := utils.ImageReference(repoName, tag)

 	if out, _, err := dockerCmdWithError("commit", containerName, repoAndTag); err != nil {

 		return "", fmt.Errorf("image tagging failed: %s, %v", out, err)
 	}
 
 	// delete the container as we don't need it any more
 	if err := deleteContainer(containerName); err != nil {
 		return "", err
 	}
 
 	// push the image

 	out, _, err := dockerCmdWithError("push", repoAndTag)

 	if err != nil {
 		return "", fmt.Errorf("pushing the image to the private registry has failed: %s, %v", out, err)
 	}
 
 	// delete our local repo that we previously tagged

 	if rmiout, _, err := dockerCmdWithError("rmi", repoAndTag); err != nil {

 		return "", fmt.Errorf("error deleting images prior to real test: %s, %v", rmiout, err)

 	}
 

 	matches := pushDigestRegex.FindStringSubmatch(out)

 	if len(matches) != 2 {
 		return "", fmt.Errorf("unable to parse digest from push output: %s", out)
 	}
 	pushDigest := matches[1]
 

 	return digest.Digest(pushDigest), nil

 }
 

 func (s *DockerRegistrySuite) TestPullByTagDisplaysDigest(c *check.C) {

 	testRequires(c, DaemonIsLinux)

 	pushDigest, err := setupImage(c)

 	if err != nil {

 		c.Fatalf("error setting up image: %v", err)

 	}
 
 	// 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)
 	if len(matches) != 2 {

 		c.Fatalf("unable to parse digest from pull output: %s", out)

 	}
 	pullDigest := matches[1]
 
 	// make sure the pushed and pull digests match

 	if pushDigest.String() != pullDigest {

 		c.Fatalf("push digest %q didn't match pull digest %q", pushDigest, pullDigest)

 	}
 }
 

 func (s *DockerRegistrySuite) TestPullByDigest(c *check.C) {

 	testRequires(c, DaemonIsLinux)

 	pushDigest, err := setupImage(c)

 	if err != nil {

 		c.Fatalf("error setting up image: %v", err)

 	}
 
 	// 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)
 	if len(matches) != 2 {

 		c.Fatalf("unable to parse digest from pull output: %s", out)

 	}
 	pullDigest := matches[1]
 
 	// make sure the pushed and pull digests match

 	if pushDigest.String() != pullDigest {

 		c.Fatalf("push digest %q didn't match pull digest %q", pushDigest, pullDigest)

 	}
 }
 

 func (s *DockerRegistrySuite) TestPullByDigestNoFallback(c *check.C) {

 	testRequires(c, DaemonIsLinux)

 	// pull from the registry using the <name>@<digest> reference
 	imageReference := fmt.Sprintf("%s@sha256:ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff", repoName)

 	out, _, err := dockerCmdWithError("pull", imageReference)

 	if err == nil || !strings.Contains(out, "manifest unknown") {

 		c.Fatalf("expected non-zero exit status and correct error message when pulling non-existing image: %s", out)
 	}
 }
 

 func (s *DockerRegistrySuite) TestCreateByDigest(c *check.C) {

 	pushDigest, err := setupImage(c)

 	if err != nil {

 		c.Fatalf("error setting up image: %v", err)

 	}
 
 	imageReference := fmt.Sprintf("%s@%s", repoName, pushDigest)
 
 	containerName := "createByDigest"

 	out, _ := dockerCmd(c, "create", "--name", containerName, imageReference)

 
 	res, err := inspectField(containerName, "Config.Image")
 	if err != nil {

 		c.Fatalf("failed to get Config.Image: %s, %v", out, err)

 	}
 	if res != imageReference {

 		c.Fatalf("unexpected Config.Image: %s (expected %s)", res, imageReference)

 	}
 }
 

 func (s *DockerRegistrySuite) TestRunByDigest(c *check.C) {

 	pushDigest, err := setupImage(c)

 	if err != nil {

 		c.Fatalf("error setting up image: %v", 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)
 	if len(matches) != 2 {

 		c.Fatalf("error locating expected 'found=1' output: %s", out)

 	}
 	if matches[1] != "1" {

 		c.Fatalf("Expected %q, got %q", "1", matches[1])

 	}
 
 	res, err := inspectField(containerName, "Config.Image")
 	if err != nil {

 		c.Fatalf("failed to get Config.Image: %s, %v", out, err)

 	}
 	if res != imageReference {

 		c.Fatalf("unexpected Config.Image: %s (expected %s)", res, imageReference)

 	}
 }
 

 func (s *DockerRegistrySuite) TestRemoveImageByDigest(c *check.C) {

 	digest, err := setupImage(c)

 	if err != nil {

 		c.Fatalf("error setting up image: %v", err)

 	}
 
 	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
 	if _, err := inspectField(imageReference, "Id"); err != nil {

 		c.Fatalf("failed to inspect image: %v", err)

 	}
 
 	// do the delete
 	if err := deleteImages(imageReference); err != nil {

 		c.Fatalf("unexpected error deleting image: %v", err)

 	}
 
 	// try to inspect again - it should error this time
 	if _, err := inspectField(imageReference, "Id"); err == nil {

 		c.Fatalf("unexpected nil err trying to inspect what should be a non-existent image")

 	} else if !strings.Contains(err.Error(), "No such image") {

 		c.Fatalf("expected 'No such image' output, got %v", err)

 	}
 }
 

 func (s *DockerRegistrySuite) TestBuildByDigest(c *check.C) {

 	digest, err := setupImage(c)

 	if err != nil {

 		c.Fatalf("error setting up image: %v", err)

 	}
 
 	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, err := inspectField(imageReference, "Id")
 	if err != nil {

 		c.Fatalf("error getting image id: %v", err)

 	}
 
 	// do the build
 	name := "buildbydigest"
 	_, err = buildImage(name, fmt.Sprintf(
 		`FROM %s
      CMD ["/bin/echo", "Hello World"]`, imageReference),
 		true)
 	if err != nil {

 		c.Fatal(err)

 	}
 
 	// get the build's image id
 	res, err := inspectField(name, "Config.Image")
 	if err != nil {

 		c.Fatal(err)

 	}
 	// make sure they match
 	if res != imageID {

 		c.Fatalf("Image %s, expected %s", res, imageID)

 	}
 }
 

 func (s *DockerRegistrySuite) TestTagByDigest(c *check.C) {

 	digest, err := setupImage(c)

 	if err != nil {

 		c.Fatalf("error setting up image: %v", err)

 	}
 
 	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, err := inspectField(imageReference, "Id")
 	if err != nil {

 		c.Fatalf("error getting original image id: %v", err)

 	}
 
 	tagID, err := inspectField(tag, "Id")
 	if err != nil {

 		c.Fatalf("error getting tagged image id: %v", err)

 	}
 
 	if tagID != expectedID {

 		c.Fatalf("expected image id %q, got %q", expectedID, tagID)

 	}
 }
 

 func (s *DockerRegistrySuite) TestListImagesWithoutDigests(c *check.C) {

 	digest, err := setupImage(c)

 	if err != nil {

 		c.Fatalf("error setting up image: %v", err)

 	}
 
 	imageReference := fmt.Sprintf("%s@%s", repoName, digest)
 
 	// pull from the registry using the <name>@<digest> reference

 	dockerCmd(c, "pull", imageReference)

 	out, _ := dockerCmd(c, "images")

 
 	if strings.Contains(out, "DIGEST") {

 		c.Fatalf("list output should not have contained DIGEST header: %s", out)

 	}
 
 }
 

 func (s *DockerRegistrySuite) TestListImagesWithDigests(c *check.C) {

 
 	// setup image1

 	digest1, err := setupImageWithTag(c, "tag1")

 	if err != nil {

 		c.Fatalf("error setting up image: %v", err)

 	}
 	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`)

 	if !re1.MatchString(out) {

 		c.Fatalf("expected %q: %s", re1.String(), out)

 	}
 
 	// setup image2

 	digest2, err := setupImageWithTag(c, "tag2")

 	if err != nil {

 		c.Fatalf("error setting up image: %v", 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=<none>, digest = $digest1
 	if !re1.MatchString(out) {

 		c.Fatalf("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`)

 	if !re2.MatchString(out) {

 		c.Fatalf("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
 	reWithTag1 := regexp.MustCompile(`\s*` + repoName + `\s*tag1\s*<none>\s`)

 	reWithDigest1 := regexp.MustCompile(`\s*` + repoName + `\s*<none>\s*` + digest1.String() + `\s`)

 	if !reWithTag1.MatchString(out) {

 		c.Fatalf("expected %q: %s", reWithTag1.String(), out)

 	}
 	if !reWithDigest1.MatchString(out) {

 		c.Fatalf("expected %q: %s", reWithDigest1.String(), out)

 	}
 	// make sure image 2 has repo, <none>, digest
 	if !re2.MatchString(out) {

 		c.Fatalf("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
 	if !reWithTag1.MatchString(out) {

 		c.Fatalf("expected %q: %s", re1.String(), out)

 	}
 
 	// make sure image 2 has repo, tag, digest
 	reWithTag2 := regexp.MustCompile(`\s*` + repoName + `\s*tag2\s*<none>\s`)

 	reWithDigest2 := regexp.MustCompile(`\s*` + repoName + `\s*<none>\s*` + digest2.String() + `\s`)

 	if !reWithTag2.MatchString(out) {

 		c.Fatalf("expected %q: %s", reWithTag2.String(), out)

 	}
 	if !reWithDigest2.MatchString(out) {

 		c.Fatalf("expected %q: %s", reWithDigest2.String(), out)

 	}
 
 	// list images

 	out, _ = dockerCmd(c, "images", "--digests")

 
 	// make sure image 1 has repo, tag, digest
 	if !reWithTag1.MatchString(out) {

 		c.Fatalf("expected %q: %s", re1.String(), out)

 	}
 	// make sure image 2 has repo, tag, digest
 	if !reWithTag2.MatchString(out) {

 		c.Fatalf("expected %q: %s", re2.String(), out)

 	}
 	// make sure busybox has tag, but not digest
 	busyboxRe := regexp.MustCompile(`\s*busybox\s*latest\s*<none>\s`)
 	if !busyboxRe.MatchString(out) {

 		c.Fatalf("expected %q: %s", busyboxRe.String(), out)

 	}
 }
 

 func (s *DockerRegistrySuite) TestInspectImageWithDigests(c *check.C) {
 	digest, err := setupImage(c)
 	c.Assert(err, check.IsNil, check.Commentf("error setting up image: %v", err))
 
 	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
 	if err = json.Unmarshal([]byte(out), &imageJSON); err != nil {
 		c.Fatalf("unable to unmarshal body for latest version: %v", err)
 	}
 
 	c.Assert(len(imageJSON), check.Equals, 1)
 	c.Assert(len(imageJSON[0].RepoDigests), check.Equals, 1)
 	c.Assert(stringutils.InSlice(imageJSON[0].RepoDigests, imageReference), check.Equals, true)
 }
 

 func (s *DockerRegistrySuite) TestPsListContainersFilterAncestorImageByDigest(c *check.C) {
 	digest, err := setupImage(c)
 	c.Assert(err, check.IsNil, check.Commentf("error setting up image: %v", err))
 
 	imageReference := fmt.Sprintf("%s@%s", repoName, digest)
 
 	// pull from the registry using the <name>@<digest> reference
 	dockerCmd(c, "pull", imageReference)
 
 	// build a image from it
 	imageName1 := "images_ps_filter_test"
 	_, err = buildImage(imageName1, fmt.Sprintf(
 		`FROM %s
 		 LABEL match me 1`, imageReference), true)
 	c.Assert(err, check.IsNil)
 
 	// run a container based on that
 	out, _ := dockerCmd(c, "run", "-d", imageReference, "echo", "hello")
 	expectedID := strings.TrimSpace(out)
 
 	// run a container based on the a descendant of that too
 	out, _ = dockerCmd(c, "run", "-d", imageName1, "echo", "hello")
 	expectedID1 := strings.TrimSpace(out)
 
 	expectedIDs := []string{expectedID, expectedID1}
 
 	// Invalid imageReference
 	out, _ = dockerCmd(c, "ps", "-a", "-q", "--no-trunc", fmt.Sprintf("--filter=ancestor=busybox@%s", digest))
 	if strings.TrimSpace(out) != "" {
 		c.Fatalf("Expected filter container for %s ancestor filter to be empty, got %v", fmt.Sprintf("busybox@%s", digest), strings.TrimSpace(out))
 	}
 
 	// Valid imageReference
 	out, _ = dockerCmd(c, "ps", "-a", "-q", "--no-trunc", "--filter=ancestor="+imageReference)
 	checkPsAncestorFilterOutput(c, out, imageReference, expectedIDs)
 }
 

 func (s *DockerRegistrySuite) TestDeleteImageByIDOnlyPulledByDigest(c *check.C) {

 	pushDigest, err := setupImage(c)

 	if err != nil {

 		c.Fatalf("error setting up image: %v", err)

 	}
 
 	// pull from the registry using the <name>@<digest> reference
 	imageReference := fmt.Sprintf("%s@%s", repoName, pushDigest)

 	dockerCmd(c, "pull", imageReference)

 	// just in case...
 

 	imageID, err := inspectField(imageReference, "Id")

 	if err != nil {

 		c.Fatalf("error inspecting image id: %v", err)

 	}
 

 	dockerCmd(c, "rmi", imageID)

 }

 
 // TestPullFailsWithAlteredManifest tests that a `docker pull` fails when
 // we have modified a manifest blob and its digest cannot be verified.
 func (s *DockerRegistrySuite) TestPullFailsWithAlteredManifest(c *check.C) {

 	testRequires(c, DaemonIsLinux)

 	manifestDigest, err := setupImage(c)
 	if err != nil {
 		c.Fatalf("error setting up image: %v", err)
 	}
 
 	// Load the target manifest blob.
 	manifestBlob := s.reg.readBlobContents(c, manifestDigest)
 
 	var imgManifest manifest.Manifest
 	if err := json.Unmarshal(manifestBlob, &imgManifest); err != nil {
 		c.Fatalf("unable to decode image manifest from blob: %s", err)
 	}
 
 	// Add a malicious layer digest to the list of layers in the manifest.
 	imgManifest.FSLayers = append(imgManifest.FSLayers, manifest.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.Marshal(imgManifest)
 	if err != nil {
 		c.Fatalf("unable to encode altered image manifest to JSON: %s", err)
 	}
 
 	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)
 	if exitStatus == 0 {

 		c.Fatalf("expected a non-zero exit status but got %d: %s", exitStatus, out)

 	}
 
 	expectedErrorMsg := fmt.Sprintf("image verification failed for digest %s", manifestDigest)
 	if !strings.Contains(out, expectedErrorMsg) {
 		c.Fatalf("expected error message %q in output: %s", expectedErrorMsg, out)
 	}
 }
 
 // TestPullFailsWithAlteredLayer tests that a `docker pull` fails when
 // we have modified a layer blob and its digest cannot be verified.
 func (s *DockerRegistrySuite) TestPullFailsWithAlteredLayer(c *check.C) {

 	testRequires(c, DaemonIsLinux)

 	manifestDigest, err := setupImage(c)
 	if err != nil {
 		c.Fatalf("error setting up image: %v", err)
 	}
 
 	// Load the target manifest blob.
 	manifestBlob := s.reg.readBlobContents(c, manifestDigest)
 
 	var imgManifest manifest.Manifest
 	if err := json.Unmarshal(manifestBlob, &imgManifest); err != nil {
 		c.Fatalf("unable to decode image manifest from blob: %s", err)
 	}
 
 	// 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.
 
 	// Pull from the registry using the <name>@<digest> reference.
 	imageReference := fmt.Sprintf("%s@%s", repoName, manifestDigest)
 	out, exitStatus, _ := dockerCmdWithError("pull", imageReference)
 	if exitStatus == 0 {
 		c.Fatalf("expected a zero exit status but got: %d", exitStatus)
 	}
 
 	expectedErrorMsg := fmt.Sprintf("filesystem layer verification failed for digest %s", targetLayerDigest)
 	if !strings.Contains(out, expectedErrorMsg) {
 		c.Fatalf("expected error message %q in output: %s", expectedErrorMsg, out)
 	}
 }