// TrustedReference returns the canonical trusted reference for an image reference
func TrustedReference(ctx context.Context, cli *command.DockerCli, ref reference.NamedTagged) (reference.Canonical, error) {
repoInfo, err := registry.ParseRepositoryInfo(ref)
if err != nil {
return nil, err
}
// Resolve the Auth config relevant for this server
authConfig := command.ResolveAuthConfig(ctx, cli, repoInfo.Index)
notaryRepo, err := trust.GetNotaryRepository(cli, repoInfo, authConfig, "pull")
if err != nil {
fmt.Fprintf(cli.Out(), "Error establishing connection to trust repository: %s\n", err)
return nil, err
}
t, err := notaryRepo.GetTargetByName(ref.Tag(), trust.ReleasesRole, data.CanonicalTargetsRole)
if err != nil {
return nil, err
}
// Only list tags in the top level targets role or the releases delegation role - ignore
// all other delegation roles
if t.Role != trust.ReleasesRole && t.Role != data.CanonicalTargetsRole {
return nil, trust.NotaryError(repoInfo.FullName(), fmt.Errorf("No trust data for %s", ref.Tag()))
}
r, err := convertTarget(t.Target)
if err != nil {
return nil, err
}
return reference.WithDigest(reference.TrimNamed(ref), r.digest)
}
func trustedResolveDigest(ctx context.Context, cli *command.DockerCli, ref reference.NamedTagged) (distreference.Canonical, error) {
repoInfo, err := registry.ParseRepositoryInfo(ref)
if err != nil {
return nil, err
}
authConfig := command.ResolveAuthConfig(ctx, cli, repoInfo.Index)
notaryRepo, err := trust.GetNotaryRepository(cli, repoInfo, authConfig, "pull")
if err != nil {
return nil, errors.Wrap(err, "error establishing connection to trust repository")
}
t, err := notaryRepo.GetTargetByName(ref.Tag(), trust.ReleasesRole, data.CanonicalTargetsRole)
if err != nil {
return nil, trust.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 != trust.ReleasesRole && t.Role != data.CanonicalTargetsRole {
return nil, trust.NotaryError(repoInfo.FullName(), fmt.Errorf("No trust data for %s", ref.String()))
}
logrus.Debugf("retrieving target for %s role\n", t.Role)
h, ok := t.Hashes["sha256"]
if !ok {
return nil, errors.New("no valid hash, expecting sha256")
}
dgst := digest.NewDigestFromHex("sha256", hex.EncodeToString(h))
// Using distribution reference package to make sure that adding a
// digest does not erase the tag. When the two reference packages
// are unified, this will no longer be an issue.
return distreference.WithDigest(ref, dgst)
}
// trustedPush handles content trust pushing of an image
func trustedPush(ctx context.Context, cli *command.DockerCli, repoInfo *registry.RepositoryInfo, ref reference.Named, authConfig types.AuthConfig, requestPrivilege types.RequestPrivilegeFunc) error {
responseBody, err := imagePushPrivileged(ctx, cli, authConfig, ref.String(), requestPrivilege)
if err != nil {
return err
}
defer responseBody.Close()
// If it is a trusted push we would like to find the target entry which match the
// tag provided in the function and then do an AddTarget later.
target := &client.Target{}
// Count the times of calling for handleTarget,
// if it is called more that once, that should be considered an error in a trusted push.
cnt := 0
handleTarget := func(aux *json.RawMessage) {
cnt++
if cnt > 1 {
// handleTarget should only be called one. This will be treated as an error.
return
}
var pushResult distribution.PushResult
err := json.Unmarshal(*aux, &pushResult)
if err == nil && pushResult.Tag != "" && pushResult.Digest.Validate() == nil {
h, err := hex.DecodeString(pushResult.Digest.Hex())
if err != nil {
target = nil
return
}
target.Name = pushResult.Tag
target.Hashes = data.Hashes{string(pushResult.Digest.Algorithm()): h}
target.Length = int64(pushResult.Size)
}
}
var tag string
switch x := ref.(type) {
case reference.Canonical:
return errors.New("cannot push a digest reference")
case reference.NamedTagged:
tag = x.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
}
fmt.Fprintln(cli.Out(), "No tag specified, skipping trust metadata push")
return nil
}
if err = jsonmessage.DisplayJSONMessagesToStream(responseBody, cli.Out(), handleTarget); err != nil {
return err
}
if cnt > 1 {
return fmt.Errorf("internal error: only one call to handleTarget expected")
}
if target == nil {
fmt.Fprintln(cli.Out(), "No targets found, please provide a specific tag in order to sign it")
return nil
}
fmt.Fprintln(cli.Out(), "Signing and pushing trust metadata")
repo, err := trust.GetNotaryRepository(cli, repoInfo, authConfig, "push", "pull")
if err != nil {
fmt.Fprintf(cli.Out(), "Error establishing connection to notary repository: %s\n", err)
return err
}
// get the latest repository metadata so we can figure out which roles to sign
err = repo.Update(false)
switch err.(type) {
case client.ErrRepoNotInitialized, client.ErrRepositoryNotExist:
keys := repo.CryptoService.ListKeys(data.CanonicalRootRole)
var rootKeyID string
// always select the first root key
if len(keys) > 0 {
sort.Strings(keys)
rootKeyID = keys[0]
} else {
rootPublicKey, err := repo.CryptoService.Create(data.CanonicalRootRole, "", data.ECDSAKey)
if err != nil {
return err
}
rootKeyID = rootPublicKey.ID()
}
// Initialize the notary repository with a remotely managed snapshot key
if err := repo.Initialize([]string{rootKeyID}, data.CanonicalSnapshotRole); err != nil {
return trust.NotaryError(repoInfo.FullName(), err)
}
fmt.Fprintf(cli.Out(), "Finished initializing %q\n", repoInfo.FullName())
err = repo.AddTarget(target, data.CanonicalTargetsRole)
case nil:
// already initialized and we have successfully downloaded the latest metadata
err = addTargetToAllSignableRoles(repo, target)
default:
return trust.NotaryError(repoInfo.FullName(), err)
}
if err == nil {
err = repo.Publish()
}
if err != nil {
fmt.Fprintf(cli.Out(), "Failed to sign %q:%s - %s\n", repoInfo.FullName(), tag, err.Error())
return trust.NotaryError(repoInfo.FullName(), err)
}
fmt.Fprintf(cli.Out(), "Successfully signed %q:%s\n", repoInfo.FullName(), tag)
return nil
}
// trustedPull handles content trust pulling of an image
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 := trust.GetNotaryRepository(cli, repoInfo, authConfig, "pull")
if err != nil {
fmt.Fprintf(cli.Out(), "Error establishing connection to trust repository: %s\n", err)
return err
}
if tagged, isTagged := ref.(reference.NamedTagged); !isTagged {
// List all targets
targets, err := notaryRepo.ListTargets(trust.ReleasesRole, data.CanonicalTargetsRole)
if err != nil {
return trust.NotaryError(repoInfo.FullName(), err)
}
for _, tgt := range targets {
t, err := convertTarget(tgt.Target)
if err != nil {
fmt.Fprintf(cli.Out(), "Skipping target for %q\n", repoInfo.Name())
continue
}
// Only list tags in the top level targets role or the releases delegation role - ignore
// all other delegation roles
if tgt.Role != trust.ReleasesRole && tgt.Role != data.CanonicalTargetsRole {
continue
}
refs = append(refs, t)
}
if len(refs) == 0 {
return trust.NotaryError(repoInfo.FullName(), fmt.Errorf("No trusted tags for %s", repoInfo.FullName()))
}
} else {
t, err := notaryRepo.GetTargetByName(tagged.Tag(), trust.ReleasesRole, data.CanonicalTargetsRole)
if err != nil {
return trust.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 != trust.ReleasesRole && t.Role != data.CanonicalTargetsRole {
return trust.NotaryError(repoInfo.FullName(), fmt.Errorf("No trust data for %s", tagged.Tag()))
}
logrus.Debugf("retrieving target for %s role\n", t.Role)
r, err := convertTarget(t.Target)
if err != nil {
return err
}
refs = append(refs, r)
}
for i, r := range refs {
displayTag := r.name
if displayTag != "" {
displayTag = ":" + displayTag
}
fmt.Fprintf(cli.Out(), "Pull (%d of %d): %s%s@%s\n", i+1, len(refs), repoInfo.Name(), displayTag, r.digest)
ref, err := reference.WithDigest(reference.TrimNamed(repoInfo), r.digest)
if err != nil {
return err
}
if err := imagePullPrivileged(ctx, cli, authConfig, ref.String(), requestPrivilege, false); 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
}
