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Refactor from feedback

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Signed-off-by: Derek McGowan <derek@mcgstyle.net> (github: dmcgowan)
This commit is contained in:
Derek McGowan 2015-01-02 11:13:11 -08:00
parent 213e3d1166
commit 25945a40c4
5 changed files with 82 additions and 93 deletions
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16
docker/docker.go
View file

@ -6,7 +6,6 @@ import (
"fmt"
"io/ioutil"
"os"
"path"
"strings"
log "github.com/Sirupsen/logrus"
@ -16,7 +15,6 @@ import (
flag "github.com/docker/docker/pkg/mflag"
"github.com/docker/docker/pkg/reexec"
"github.com/docker/docker/utils"
"github.com/docker/libtrust"
)
const (
@ -79,22 +77,10 @@ func main() {
}
protoAddrParts := strings.SplitN(flHosts[0], "://", 2)
err := os.MkdirAll(path.Dir(*flTrustKey), 0700)
trustKey, err := api.LoadOrCreateTrustKey(*flTrustKey)
if err != nil {
log.Fatal(err)
}
trustKey, err := libtrust.LoadKeyFile(*flTrustKey)
if err == libtrust.ErrKeyFileDoesNotExist {
trustKey, err = libtrust.GenerateECP256PrivateKey()
if err != nil {
log.Fatalf("Error generating key: %s", err)
}
if err := libtrust.SaveKey(*flTrustKey, trustKey); err != nil {
log.Fatalf("Error saving key file: %s", err)
}
} else if err != nil {
log.Fatalf("Error loading key file: %s", err)
}
var (
cli *client.DockerCli

79
graph/manifest.go
View file

@ -1,6 +1,7 @@
package graph
import (
"bytes"
"encoding/json"
"errors"
"fmt"
@ -8,10 +9,12 @@ import (
"io/ioutil"
"path"
log "github.com/Sirupsen/logrus"
"github.com/docker/docker/engine"
"github.com/docker/docker/pkg/tarsum"
"github.com/docker/docker/registry"
"github.com/docker/docker/runconfig"
"github.com/docker/libtrust"
)
func (s *TagStore) CmdManifest(job *engine.Job) engine.Status {
@ -49,11 +52,15 @@ func (s *TagStore) newManifest(localName, remoteName, tag string) ([]byte, error
Tag: tag,
SchemaVersion: 1,
}
localRepo, exists := s.Repositories[localName]
if !exists {
localRepo, err := s.Get(localName)
if err != nil {
return nil, err
}
if localRepo == nil {
return nil, fmt.Errorf("Repo does not exist: %s", localName)
}
// Get the top-most layer id which the tag points to
layerId, exists := localRepo[tag]
if !exists {
return nil, fmt.Errorf("Tag does not exist for %s: %s", localName, tag)
@ -102,7 +109,6 @@ func (s *TagStore) newManifest(localName, remoteName, tag string) ([]byte, error
}
tarId := tarSum.Sum(nil)
// Save tarsum to image json
manifest.FSLayers = append(manifest.FSLayers, &registry.FSLayer{BlobSum: tarId})
@ -121,3 +127,70 @@ func (s *TagStore) newManifest(localName, remoteName, tag string) ([]byte, error
return manifestBytes, nil
}
func (s *TagStore) verifyManifest(eng *engine.Engine, manifestBytes []byte) (*registry.ManifestData, bool, error) {
sig, err := libtrust.ParsePrettySignature(manifestBytes, "signatures")
if err != nil {
return nil, false, fmt.Errorf("error parsing payload: %s", err)
}
keys, err := sig.Verify()
if err != nil {
return nil, false, fmt.Errorf("error verifying payload: %s", err)
}
payload, err := sig.Payload()
if err != nil {
return nil, false, fmt.Errorf("error retrieving payload: %s", err)
}
var manifest registry.ManifestData
if err := json.Unmarshal(payload, &manifest); err != nil {
return nil, false, fmt.Errorf("error unmarshalling manifest: %s", err)
}
if manifest.SchemaVersion != 1 {
return nil, false, fmt.Errorf("unsupported schema version: %d", manifest.SchemaVersion)
}
var verified bool
for _, key := range keys {
job := eng.Job("trust_key_check")
b, err := key.MarshalJSON()
if err != nil {
return nil, false, fmt.Errorf("error marshalling public key: %s", err)
}
namespace := manifest.Name
if namespace[0] != '/' {
namespace = "/" + namespace
}
stdoutBuffer := bytes.NewBuffer(nil)
job.Args = append(job.Args, namespace)
job.Setenv("PublicKey", string(b))
// Check key has read/write permission (0x03)
job.SetenvInt("Permission", 0x03)
job.Stdout.Add(stdoutBuffer)
if err = job.Run(); err != nil {
return nil, false, fmt.Errorf("error running key check: %s", err)
}
result := engine.Tail(stdoutBuffer, 1)
log.Debugf("Key check result: %q", result)
if result == "verified" {
verified = true
}
}
return &manifest, verified, nil
}
func checkValidManifest(manifest *registry.ManifestData) error {
if len(manifest.FSLayers) != len(manifest.History) {
return fmt.Errorf("length of history not equal to number of layers")
}
if len(manifest.FSLayers) == 0 {
return fmt.Errorf("no FSLayers in manifest")
}
return nil
}

67
graph/pull.go
View file

@ -1,8 +1,6 @@
package graph
import (
"bytes"
"encoding/json"
"fmt"
"io"
"io/ioutil"
@ -18,63 +16,8 @@ import (
"github.com/docker/docker/pkg/tarsum"
"github.com/docker/docker/registry"
"github.com/docker/docker/utils"
"github.com/docker/libtrust"
)
func (s *TagStore) verifyManifest(eng *engine.Engine, manifestBytes []byte) (*registry.ManifestData, bool, error) {
sig, err := libtrust.ParsePrettySignature(manifestBytes, "signatures")
if err != nil {
return nil, false, fmt.Errorf("error parsing payload: %s", err)
}
keys, err := sig.Verify()
if err != nil {
return nil, false, fmt.Errorf("error verifying payload: %s", err)
}
payload, err := sig.Payload()
if err != nil {
return nil, false, fmt.Errorf("error retrieving payload: %s", err)
}
var manifest registry.ManifestData
if err := json.Unmarshal(payload, &manifest); err != nil {
return nil, false, fmt.Errorf("error unmarshalling manifest: %s", err)
}
if manifest.SchemaVersion != 1 {
return nil, false, fmt.Errorf("unsupported schema version: %d", manifest.SchemaVersion)
}
var verified bool
for _, key := range keys {
job := eng.Job("trust_key_check")
b, err := key.MarshalJSON()
if err != nil {
return nil, false, fmt.Errorf("error marshalling public key: %s", err)
}
namespace := manifest.Name
if namespace[0] != '/' {
namespace = "/" + namespace
}
stdoutBuffer := bytes.NewBuffer(nil)
job.Args = append(job.Args, namespace)
job.Setenv("PublicKey", string(b))
// Check key has read/write permission (0x03)
job.SetenvInt("Permission", 0x03)
job.Stdout.Add(stdoutBuffer)
if err = job.Run(); err != nil {
return nil, false, fmt.Errorf("error running key check: %s", err)
}
result := engine.Tail(stdoutBuffer, 1)
log.Debugf("Key check result: %q", result)
if result == "verified" {
verified = true
}
}
return &manifest, verified, nil
}
func (s *TagStore) CmdPull(job *engine.Job) engine.Status {
if n := len(job.Args); n != 1 && n != 2 {
return job.Errorf("Usage: %s IMAGE [TAG]", job.Name)
@ -113,7 +56,6 @@ func (s *TagStore) CmdPull(job *engine.Job) engine.Status {
}
defer s.poolRemove("pull", repoInfo.LocalName+":"+tag)
log.Debugf("pulling image from host %q with remote name %q", repoInfo.Index.Name, repoInfo.RemoteName)
endpoint, err := repoInfo.GetEndpoint()
if err != nil {
@ -484,8 +426,8 @@ func (s *TagStore) pullV2Tag(eng *engine.Engine, r *registry.Session, out io.Wri
return false, fmt.Errorf("error verifying manifest: %s", err)
}
if len(manifest.FSLayers) != len(manifest.History) {
return false, fmt.Errorf("length of history not equal to number of layers")
if err := checkValidManifest(manifest); err != nil {
return false, err
}
if verified {
@ -493,11 +435,6 @@ func (s *TagStore) pullV2Tag(eng *engine.Engine, r *registry.Session, out io.Wri
} else {
out.Write(sf.FormatStatus(tag, "Pulling from %s", repoInfo.CanonicalName))
}
if len(manifest.FSLayers) == 0 {
return false, fmt.Errorf("no blobSums in manifest")
}
downloads := make([]downloadInfo, len(manifest.FSLayers))
for i := len(manifest.FSLayers) - 1; i >= 0; i-- {

10
graph/push.go
View file

@ -311,14 +311,13 @@ func (s *TagStore) CmdPush(job *engine.Job) engine.Status {
// TODO Create manifest and sign
}
// try via manifest
manifest, verified, err := s.verifyManifest(job.Eng, []byte(manifestBytes))
if err != nil {
return job.Errorf("error verifying manifest: %s", err)
}
if len(manifest.FSLayers) != len(manifest.History) {
return job.Errorf("length of history not equal to number of layers")
if err := checkValidManifest(manifest); err != nil {
return job.Errorf("invalid manifest: %s", err)
}
if !verified {
@ -337,11 +336,6 @@ func (s *TagStore) CmdPush(job *engine.Job) engine.Status {
}
manifestSum := sumParts[1]
// for each layer, check if it exists ...
// XXX wait this requires having the TarSum of the layer.tar first
// skip this step for now. Just push the layer every time for this naive implementation
//shouldPush, err := r.PostV2ImageMountBlob(imageName, sumType, sum string, token []string)
img, err := image.NewImgJSON(imgJSON)
if err != nil {
return job.Errorf("Failed to parse json: %s", err)

3
registry/session_v2.go
View file

@ -5,7 +5,6 @@ import (
"fmt"
"io"
"io/ioutil"
"net/url"
"strconv"
log "github.com/Sirupsen/logrus"
@ -223,7 +222,7 @@ func (r *Session) PutV2ImageBlob(imageName, sumType, sumStr string, blobRdr io.R
if err != nil {
return err
}
queryParams := url.Values{}
queryParams := req.URL.Query()
queryParams.Add("digest", sumType+":"+sumStr)
req.URL.RawQuery = queryParams.Encode()
if err := auth.Authorize(req); err != nil {