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registry: Remove reference.go

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This removes some very old vestigial code that really should have been
removed during the content addressability transition. It implements
something called "reference" but it behaves differently from the actual
reference package. This was only used by client-side content trust code,
and is relatively easy to extricate.

Signed-off-by: Aaron Lehmann <aaron.lehmann@docker.com>
This commit is contained in:
Aaron Lehmann 2016-12-06 11:27:27 -08:00
parent eefbf1ddd3
commit d91ed88365
3 changed files with 29 additions and 111 deletions
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17
cli/command/image/pull.go
View file

@ -55,16 +55,6 @@ func runPull(dockerCli *command.DockerCli, opts pullOptions) error {
fmt.Fprintf(dockerCli.Out(), "Using default tag: %s\n", reference.DefaultTag)
}
var tag string
switch x := distributionRef.(type) {
case reference.Canonical:
tag = x.Digest().String()
case reference.NamedTagged:
tag = x.Tag()
}
registryRef := registry.ParseReference(tag)
// Resolve the Repository name from fqn to RepositoryInfo
repoInfo, err := registry.ParseRepositoryInfo(distributionRef)
if err != nil {
@ -76,9 +66,10 @@ func runPull(dockerCli *command.DockerCli, opts pullOptions) error {
authConfig := command.ResolveAuthConfig(ctx, dockerCli, repoInfo.Index)
requestPrivilege := command.RegistryAuthenticationPrivilegedFunc(dockerCli, repoInfo.Index, "pull")
if command.IsTrusted() && !registryRef.HasDigest() {
// Check if tag is digest
err = trustedPull(ctx, dockerCli, repoInfo, registryRef, authConfig, requestPrivilege)
// Check if reference has a digest
_, isCanonical := distributionRef.(reference.Canonical)
if command.IsTrusted() && !isCanonical {
err = trustedPull(ctx, dockerCli, repoInfo, distributionRef, authConfig, requestPrivilege)
} else {
err = imagePullPrivileged(ctx, dockerCli, authConfig, distributionRef.String(), requestPrivilege, opts.all)
}

55
cli/command/image/trust.go
View file

@ -46,9 +46,9 @@ var (
)
type target struct {
reference registry.Reference
digest digest.Digest
size int64
name string
digest digest.Digest
size int64
}
// trustedPush handles content trust pushing of an image
@ -81,7 +81,7 @@ func trustedPush(ctx context.Context, cli *command.DockerCli, repoInfo *registry
target = nil
return
}
target.Name = registry.ParseReference(pushResult.Tag).String()
target.Name = pushResult.Tag
target.Hashes = data.Hashes{string(pushResult.Digest.Algorithm()): h}
target.Length = int64(pushResult.Size)
}
@ -93,11 +93,9 @@ func trustedPush(ctx context.Context, cli *command.DockerCli, repoInfo *registry
return errors.New("cannot push a digest reference")
case reference.NamedTagged:
tag = x.Tag()
}
// We want trust signatures to always take an explicit tag,
// otherwise it will act as an untrusted push.
if tag == "" {
default:
// We want trust signatures to always take an explicit tag,
// otherwise it will act as an untrusted push.
if err = jsonmessage.DisplayJSONMessagesToStream(responseBody, cli.Out(), nil); err != nil {
return err
}
@ -234,7 +232,7 @@ func imagePushPrivileged(ctx context.Context, cli *command.DockerCli, authConfig
}
// trustedPull handles content trust pulling of an image
func trustedPull(ctx context.Context, cli *command.DockerCli, repoInfo *registry.RepositoryInfo, ref registry.Reference, authConfig types.AuthConfig, requestPrivilege types.RequestPrivilegeFunc) error {
func trustedPull(ctx context.Context, cli *command.DockerCli, repoInfo *registry.RepositoryInfo, ref reference.Named, authConfig types.AuthConfig, requestPrivilege types.RequestPrivilegeFunc) error {
var refs []target
notaryRepo, err := GetNotaryRepository(cli, repoInfo, authConfig, "pull")
@ -243,7 +241,7 @@ func trustedPull(ctx context.Context, cli *command.DockerCli, repoInfo *registry
return err
}
if ref.String() == "" {
if tagged, isTagged := ref.(reference.NamedTagged); !isTagged {
// List all targets
targets, err := notaryRepo.ListTargets(releasesRole, data.CanonicalTargetsRole)
if err != nil {
@ -266,14 +264,14 @@ func trustedPull(ctx context.Context, cli *command.DockerCli, repoInfo *registry
return notaryError(repoInfo.FullName(), fmt.Errorf("No trusted tags for %s", repoInfo.FullName()))
}
} else {
t, err := notaryRepo.GetTargetByName(ref.String(), releasesRole, data.CanonicalTargetsRole)
t, err := notaryRepo.GetTargetByName(tagged.Tag(), releasesRole, data.CanonicalTargetsRole)
if err != nil {
return notaryError(repoInfo.FullName(), err)
}
// Only get the tag if it's in the top level targets role or the releases delegation role
// ignore it if it's in any other delegation roles
if t.Role != releasesRole && t.Role != data.CanonicalTargetsRole {
return notaryError(repoInfo.FullName(), fmt.Errorf("No trust data for %s", ref.String()))
return notaryError(repoInfo.FullName(), fmt.Errorf("No trust data for %s", tagged.Tag()))
}
logrus.Debugf("retrieving target for %s role\n", t.Role)
@ -286,7 +284,7 @@ func trustedPull(ctx context.Context, cli *command.DockerCli, repoInfo *registry
}
for i, r := range refs {
displayTag := r.reference.String()
displayTag := r.name
if displayTag != "" {
displayTag = ":" + displayTag
}
@ -300,19 +298,16 @@ func trustedPull(ctx context.Context, cli *command.DockerCli, repoInfo *registry
return err
}
// If reference is not trusted, tag by trusted reference
if !r.reference.HasDigest() {
tagged, err := reference.WithTag(repoInfo, r.reference.String())
if err != nil {
return err
}
trustedRef, err := reference.WithDigest(reference.TrimNamed(repoInfo), r.digest)
if err != nil {
return err
}
if err := TagTrusted(ctx, cli, trustedRef, tagged); err != nil {
return err
}
tagged, err := reference.WithTag(repoInfo, r.name)
if err != nil {
return err
}
trustedRef, err := reference.WithDigest(reference.TrimNamed(repoInfo), r.digest)
if err != nil {
return err
}
if err := TagTrusted(ctx, cli, trustedRef, tagged); err != nil {
return err
}
}
return nil
@ -533,9 +528,9 @@ func convertTarget(t client.Target) (target, error) {
return target{}, errors.New("no valid hash, expecting sha256")
}
return target{
reference: registry.ParseReference(t.Name),
digest: digest.NewDigestFromHex("sha256", hex.EncodeToString(h)),
size: t.Length,
name: t.Name,
digest: digest.NewDigestFromHex("sha256", hex.EncodeToString(h)),
size: t.Length,
}, nil
}

68
registry/reference.go
View file

@ -1,68 +0,0 @@
package registry
import (
"strings"
"github.com/docker/distribution/digest"
)
// Reference represents a tag or digest within a repository
type Reference interface {
// HasDigest returns whether the reference has a verifiable
// content addressable reference which may be considered secure.
HasDigest() bool
// ImageName returns an image name for the given repository
ImageName(string) string
// Returns a string representation of the reference
String() string
}
type tagReference struct {
tag string
}
func (tr tagReference) HasDigest() bool {
return false
}
func (tr tagReference) ImageName(repo string) string {
return repo + ":" + tr.tag
}
func (tr tagReference) String() string {
return tr.tag
}
type digestReference struct {
digest digest.Digest
}
func (dr digestReference) HasDigest() bool {
return true
}
func (dr digestReference) ImageName(repo string) string {
return repo + "@" + dr.String()
}
func (dr digestReference) String() string {
return dr.digest.String()
}
// ParseReference parses a reference into either a digest or tag reference
func ParseReference(ref string) Reference {
if strings.Contains(ref, ":") {
dgst, err := digest.ParseDigest(ref)
if err == nil {
return digestReference{digest: dgst}
}
}
return tagReference{tag: ref}
}
// DigestReference creates a digest reference using a digest
func DigestReference(dgst digest.Digest) Reference {
return digestReference{digest: dgst}
}