build: remove DCT support for classic builder

cli/command/image/build.go

@@ -1,8 +1,6 @@
 package image
 
 import (
-	"archive/tar"
-	"bufio"
 	"bytes"
 	"context"
 	"encoding/json"
@@ -20,9 +18,7 @@ import (
 	"github.com/docker/cli/cli/command/completion"
 	"github.com/docker/cli/cli/command/image/build"
 	"github.com/docker/cli/cli/streams"
-	"github.com/docker/cli/cli/trust"
 	"github.com/docker/cli/internal/jsonstream"
-	"github.com/docker/cli/internal/lazyregexp"
 	"github.com/docker/cli/opts"
 	buildtypes "github.com/docker/docker/api/types/build"
 	"github.com/docker/docker/api/types/container"
@@ -65,7 +61,6 @@ type buildOptions struct {
 	target         string
 	imageIDFile    string
 	platform       string
-	untrusted      bool
 }
 
 // dockerfileFromStdin returns true when the user specified that the Dockerfile
@@ -144,7 +139,8 @@ func NewBuildCommand(dockerCli command.Cli) *cobra.Command {
 	flags.SetAnnotation("target", annotation.ExternalURL, []string{"https://docs.docker.com/reference/cli/docker/buildx/build/#target"})
 	flags.StringVar(&options.imageIDFile, "iidfile", "", "Write the image ID to the file")
 
-	command.AddTrustVerificationFlags(flags, &options.untrusted, dockerCli.ContentTrustEnabled())
+	flags.Bool("disable-content-trust", dockerCli.ContentTrustEnabled(), "Skip image verification (deprecated)")
+	_ = flags.MarkHidden("disable-content-trust")
 
 	flags.StringVar(&options.platform, "platform", os.Getenv("DOCKER_DEFAULT_PLATFORM"), "Set platform if server is multi-platform capable")
 	flags.SetAnnotation("platform", "version", []string{"1.38"})
@@ -286,26 +282,6 @@ func runBuild(ctx context.Context, dockerCli command.Cli, options buildOptions)
 	ctx, cancel := context.WithCancel(ctx)
 	defer cancel()
 
-	var resolvedTags []*resolvedTag
-	if !options.untrusted {
-		translator := func(ctx context.Context, ref reference.NamedTagged) (reference.Canonical, error) {
-			return TrustedReference(ctx, dockerCli, ref)
-		}
-		// if there is a tar wrapper, the dockerfile needs to be replaced inside it
-		if buildCtx != nil {
-			// Wrap the tar archive to replace the Dockerfile entry with the rewritten
-			// Dockerfile which uses trusted pulls.
-			buildCtx = replaceDockerfileForContentTrust(ctx, buildCtx, relDockerfile, translator, &resolvedTags)
-		} else if dockerfileCtx != nil {
-			// if there was not archive context still do the possible replacements in Dockerfile
-			newDockerfile, _, err := rewriteDockerfileFromForContentTrust(ctx, dockerfileCtx, translator)
-			if err != nil {
-				return err
-			}
-			dockerfileCtx = io.NopCloser(bytes.NewBuffer(newDockerfile))
-		}
-	}
-
 	if options.compress {
 		buildCtx, err = build.Compress(buildCtx)
 		if err != nil {
@@ -402,21 +378,10 @@ func runBuild(ctx context.Context, dockerCli command.Cli, options buildOptions)
 			return err
 		}
 	}
-	if !options.untrusted {
-		// Since the build was successful, now we must tag any of the resolved
-		// images from the above Dockerfile rewrite.
-		for _, resolved := range resolvedTags {
-			if err := trust.TagTrusted(ctx, dockerCli.Client(), dockerCli.Err(), resolved.digestRef, resolved.tagRef); err != nil {
-				return err
-			}
-		}
-	}
 
 	return nil
 }
 
-type translatorFunc func(context.Context, reference.NamedTagged) (reference.Canonical, error)
-
 // validateTag checks if the given image name can be resolved.
 func validateTag(rawRepo string) (string, error) {
 	_, err := reference.ParseNormalizedNamed(rawRepo)
@@ -427,118 +392,6 @@ func validateTag(rawRepo string) (string, error) {
 	return rawRepo, nil
 }
 
-var dockerfileFromLinePattern = lazyregexp.New(`(?i)^[\s]*FROM[ \f\r\t\v]+(?P<image>[^ \f\r\t\v\n#]+)`)
-
-// resolvedTag records the repository, tag, and resolved digest reference
-// from a Dockerfile rewrite.
-type resolvedTag struct {
-	digestRef reference.Canonical
-	tagRef    reference.NamedTagged
-}
-
-// noBaseImageSpecifier is the symbol used by the FROM
-// command to specify that no base image is to be used.
-const noBaseImageSpecifier = "scratch"
-
-// rewriteDockerfileFromForContentTrust rewrites the given Dockerfile by resolving images in
-// "FROM <image>" instructions to a digest reference. `translator` is a
-// function that takes a repository name and tag reference and returns a
-// trusted digest reference.
-// This should be called *only* when content trust is enabled
-func rewriteDockerfileFromForContentTrust(ctx context.Context, dockerfile io.Reader, translator translatorFunc) (newDockerfile []byte, resolvedTags []*resolvedTag, err error) {
-	scanner := bufio.NewScanner(dockerfile)
-	buf := bytes.NewBuffer(nil)
-
-	// Scan the lines of the Dockerfile, looking for a "FROM" line.
-	for scanner.Scan() {
-		line := scanner.Text()
-
-		matches := dockerfileFromLinePattern.FindStringSubmatch(line)
-		if matches != nil && matches[1] != noBaseImageSpecifier {
-			// Replace the line with a resolved "FROM repo@digest"
-			var ref reference.Named
-			ref, err = reference.ParseNormalizedNamed(matches[1])
-			if err != nil {
-				return nil, nil, err
-			}
-			ref = reference.TagNameOnly(ref)
-			if ref, ok := ref.(reference.NamedTagged); ok {
-				trustedRef, err := translator(ctx, ref)
-				if err != nil {
-					return nil, nil, err
-				}
-
-				line = dockerfileFromLinePattern.ReplaceAllLiteralString(line, "FROM "+reference.FamiliarString(trustedRef))
-				resolvedTags = append(resolvedTags, &resolvedTag{
-					digestRef: trustedRef,
-					tagRef:    ref,
-				})
-			}
-		}
-
-		_, err := fmt.Fprintln(buf, line)
-		if err != nil {
-			return nil, nil, err
-		}
-	}
-
-	return buf.Bytes(), resolvedTags, scanner.Err()
-}
-
-// replaceDockerfileForContentTrust wraps the given input tar archive stream and
-// uses the translator to replace the Dockerfile which uses a trusted reference.
-// Returns a new tar archive stream with the replaced Dockerfile.
-func replaceDockerfileForContentTrust(ctx context.Context, inputTarStream io.ReadCloser, dockerfileName string, translator translatorFunc, resolvedTags *[]*resolvedTag) io.ReadCloser {
-	pipeReader, pipeWriter := io.Pipe()
-	go func() {
-		tarReader := tar.NewReader(inputTarStream)
-		tarWriter := tar.NewWriter(pipeWriter)
-
-		defer inputTarStream.Close()
-
-		for {
-			hdr, err := tarReader.Next()
-			if err == io.EOF {
-				// Signals end of archive.
-				_ = tarWriter.Close()
-				_ = pipeWriter.Close()
-				return
-			}
-			if err != nil {
-				_ = pipeWriter.CloseWithError(err)
-				return
-			}
-
-			content := io.Reader(tarReader)
-			if hdr.Name == dockerfileName {
-				// This entry is the Dockerfile. Since the tar archive was
-				// generated from a directory on the local filesystem, the
-				// Dockerfile will only appear once in the archive.
-				var newDockerfile []byte
-				newDockerfile, *resolvedTags, err = rewriteDockerfileFromForContentTrust(ctx, content, translator)
-				if err != nil {
-					_ = pipeWriter.CloseWithError(err)
-					return
-				}
-				hdr.Size = int64(len(newDockerfile))
-				content = bytes.NewBuffer(newDockerfile)
-			}
-
-			if err := tarWriter.WriteHeader(hdr); err != nil {
-				_ = pipeWriter.CloseWithError(err)
-				return
-			}
-
-			if _, err := io.Copy(tarWriter, content); err != nil {
-				_ = pipeWriter.CloseWithError(err)
-				return
-			}
-		}
-	}()
-
-	return pipeReader
-}
-
 func imageBuildOptions(dockerCli command.Cli, options buildOptions) buildtypes.ImageBuildOptions {
 	configFile := dockerCli.ConfigFile()
 	return buildtypes.ImageBuildOptions{

cli/command/image/build_test.go

@@ -47,7 +47,6 @@ func TestRunBuildDockerfileFromStdinWithCompress(t *testing.T) {
 	options.compress = true
 	options.dockerfileName = "-"
 	options.context = dir.Path()
-	options.untrusted = true
 	assert.NilError(t, runBuild(context.TODO(), cli, options))
 
 	expected := []string{fakeBuild.options.Dockerfile, ".dockerignore", "foo"}
@@ -74,7 +73,6 @@ func TestRunBuildResetsUidAndGidInContext(t *testing.T) {
 
 	options := newBuildOptions()
 	options.context = dir.Path()
-	options.untrusted = true
 	assert.NilError(t, runBuild(context.TODO(), cli, options))
 
 	headers := fakeBuild.headers(t)
@@ -109,7 +107,6 @@ COPY data /data
 	options := newBuildOptions()
 	options.context = dir.Path()
 	options.dockerfileName = df.Path()
-	options.untrusted = true
 	assert.NilError(t, runBuild(context.TODO(), cli, options))
 
 	expected := []string{fakeBuild.options.Dockerfile, ".dockerignore", "data"}
@@ -170,7 +167,6 @@ RUN echo hello world
 	cli := test.NewFakeCli(&fakeClient{imageBuildFunc: fakeBuild.build})
 	options := newBuildOptions()
 	options.context = tmpDir.Join("context-link")
-	options.untrusted = true
 	assert.NilError(t, runBuild(context.TODO(), cli, options))
 
 	assert.DeepEqual(t, fakeBuild.filenames(t), []string{"Dockerfile"})

contrib/completion/bash/docker

@@ -2803,7 +2803,6 @@ _docker_image_build() {
 	"
 
 	local boolean_options="
-		--disable-content-trust=false
 		--force-rm
 		--help
 		--no-cache

contrib/completion/fish/docker.fish

@@ -139,7 +139,6 @@ complete -c docker -A -f -n '__fish_seen_subcommand_from build' -l cpu-quota -d
 complete -c docker -A -f -n '__fish_seen_subcommand_from build' -s c -l cpu-shares -d 'CPU shares (relative weight)'
 complete -c docker -A -f -n '__fish_seen_subcommand_from build' -l cpuset-cpus -d 'CPUs in which to allow execution (0-3, 0,1)'
 complete -c docker -A -f -n '__fish_seen_subcommand_from build' -l cpuset-mems -d 'MEMs in which to allow execution (0-3, 0,1)'
-complete -c docker -A -f -n '__fish_seen_subcommand_from build' -l disable-content-trust -d 'Skip image verification'
 complete -c docker -A -f -n '__fish_seen_subcommand_from build' -s f -l file -d "Name of the Dockerfile (Default is ‘PATH/Dockerfile’)"
 complete -c docker -A -f -n '__fish_seen_subcommand_from build' -l force-rm -d 'Always remove intermediate containers'
 complete -c docker -A -f -n '__fish_seen_subcommand_from build' -l help -d 'Print usage'

contrib/completion/zsh/_docker

@@ -1005,7 +1005,6 @@ __docker_image_subcommand() {
                 "($help)--cpu-rt-runtime=[Limit the CPU real-time runtime]:CPU real-time runtime in microseconds: " \
                 "($help)--cpuset-cpus=[CPUs in which to allow execution]:CPUs: " \
                 "($help)--cpuset-mems=[MEMs in which to allow execution]:MEMs: " \
-                "($help)--disable-content-trust[Skip image verification]" \
                 "($help -f --file)"{-f=,--file=}"[Name of the Dockerfile]:Dockerfile:_files" \
                 "($help)--force-rm[Always remove intermediate containers]" \
                 "($help)--isolation=[Container isolation technology]:isolation:(default hyperv process)" \

docs/reference/commandline/build.md

@@ -21,7 +21,6 @@ Build an image from a Dockerfile
 | `-c`, `--cpu-shares`                                                                                                                                 | `int64`       | `0`       | CPU shares (relative weight)                                      |
 | `--cpuset-cpus`                                                                                                                                      | `string`      |           | CPUs in which to allow execution (0-3, 0,1)                       |
 | `--cpuset-mems`                                                                                                                                      | `string`      |           | MEMs in which to allow execution (0-3, 0,1)                       |
-| `--disable-content-trust`                                                                                                                            | `bool`        | `true`    | Skip image verification                                           |
 | [`-f`](https://docs.docker.com/reference/cli/docker/buildx/build/#file), [`--file`](https://docs.docker.com/reference/cli/docker/buildx/build/#file) | `string`      |           | Name of the Dockerfile (Default is `PATH/Dockerfile`)             |
 | `--force-rm`                                                                                                                                         | `bool`        |           | Always remove intermediate containers                             |
 | `--iidfile`                                                                                                                                          | `string`      |           | Write the image ID to the file                                    |

docs/reference/commandline/builder_build.md

@@ -21,7 +21,6 @@ Build an image from a Dockerfile
 | `-c`, `--cpu-shares`                                                                                                                                 | `int64`       | `0`       | CPU shares (relative weight)                                      |
 | `--cpuset-cpus`                                                                                                                                      | `string`      |           | CPUs in which to allow execution (0-3, 0,1)                       |
 | `--cpuset-mems`                                                                                                                                      | `string`      |           | MEMs in which to allow execution (0-3, 0,1)                       |
-| `--disable-content-trust`                                                                                                                            | `bool`        | `true`    | Skip image verification                                           |
 | [`-f`](https://docs.docker.com/reference/cli/docker/buildx/build/#file), [`--file`](https://docs.docker.com/reference/cli/docker/buildx/build/#file) | `string`      |           | Name of the Dockerfile (Default is `PATH/Dockerfile`)             |
 | `--force-rm`                                                                                                                                         | `bool`        |           | Always remove intermediate containers                             |
 | `--iidfile`                                                                                                                                          | `string`      |           | Write the image ID to the file                                    |

docs/reference/commandline/image_build.md

@@ -21,7 +21,6 @@ Build an image from a Dockerfile
 | `-c`, `--cpu-shares`                                                                                                                                 | `int64`       | `0`       | CPU shares (relative weight)                                      |
 | `--cpuset-cpus`                                                                                                                                      | `string`      |           | CPUs in which to allow execution (0-3, 0,1)                       |
 | `--cpuset-mems`                                                                                                                                      | `string`      |           | MEMs in which to allow execution (0-3, 0,1)                       |
-| `--disable-content-trust`                                                                                                                            | `bool`        | `true`    | Skip image verification                                           |
 | [`-f`](https://docs.docker.com/reference/cli/docker/buildx/build/#file), [`--file`](https://docs.docker.com/reference/cli/docker/buildx/build/#file) | `string`      |           | Name of the Dockerfile (Default is `PATH/Dockerfile`)             |
 | `--force-rm`                                                                                                                                         | `bool`        |           | Always remove intermediate containers                             |
 | `--iidfile`                                                                                                                                          | `string`      |           | Write the image ID to the file                                    |

e2e/image/build_test.go

@@ -14,7 +14,6 @@ import (
 	is "gotest.tools/v3/assert/cmp"
 	"gotest.tools/v3/fs"
 	"gotest.tools/v3/icmd"
-	"gotest.tools/v3/skip"
 )
 
 func TestBuildFromContextDirectoryWithTag(t *testing.T) {
@@ -62,68 +61,6 @@ func TestBuildFromContextDirectoryWithTag(t *testing.T) {
 	})
 }
 
-func TestTrustedBuild(t *testing.T) {
-	skip.If(t, environment.RemoteDaemon())
-	t.Setenv("DOCKER_BUILDKIT", "0")
-
-	dir := fixtures.SetupConfigFile(t)
-	defer dir.Remove()
-	image1 := fixtures.CreateMaskedTrustedRemoteImage(t, registryPrefix, "trust-build1", "latest")
-	image2 := fixtures.CreateMaskedTrustedRemoteImage(t, registryPrefix, "trust-build2", "latest")
-
-	buildDir := fs.NewDir(t, "test-trusted-build-context-dir",
-		fs.WithFile("Dockerfile", fmt.Sprintf(`
-	FROM %s as build-base
-	RUN echo ok > /foo
-	FROM %s
-	COPY --from=build-base foo bar
-		`, image1, image2)))
-	defer buildDir.Remove()
-
-	result := icmd.RunCmd(
-		icmd.Command("docker", "build", "-t", "myimage", "."),
-		withWorkingDir(buildDir),
-		fixtures.WithConfig(dir.Path()),
-		fixtures.WithTrust,
-		fixtures.WithNotary,
-	)
-
-	result.Assert(t, icmd.Expected{
-		Out: fmt.Sprintf("FROM %s@sha", image1[:len(image1)-7]),
-		Err: fmt.Sprintf("Tagging %s@sha", image1[:len(image1)-7]),
-	})
-	result.Assert(t, icmd.Expected{
-		Out: fmt.Sprintf("FROM %s@sha", image2[:len(image2)-7]),
-	})
-}
-
-func TestTrustedBuildUntrustedImage(t *testing.T) {
-	skip.If(t, environment.RemoteDaemon())
-	t.Setenv("DOCKER_BUILDKIT", "0")
-
-	dir := fixtures.SetupConfigFile(t)
-	defer dir.Remove()
-	buildDir := fs.NewDir(t, "test-trusted-build-context-dir",
-		fs.WithFile("Dockerfile", fmt.Sprintf(`
-	FROM %s
-	RUN []
-		`, fixtures.AlpineImage)))
-	defer buildDir.Remove()
-
-	result := icmd.RunCmd(
-		icmd.Command("docker", "build", "-t", "myimage", "."),
-		withWorkingDir(buildDir),
-		fixtures.WithConfig(dir.Path()),
-		fixtures.WithTrust,
-		fixtures.WithNotary,
-	)
-
-	result.Assert(t, icmd.Expected{
-		ExitCode: 1,
-		Err:      "does not have trust data for",
-	})
-}
-
 func TestBuildIidFileSquash(t *testing.T) {
 	environment.SkipIfNotExperimentalDaemon(t)
 	t.Setenv("DOCKER_BUILDKIT", "0")