1
0
Fork 0
mirror of https://github.com/moby/moby.git synced 2022-11-09 12:21:53 -05:00
moby--moby/registry/session_v2.go
Derek McGowan 7c88e8f13d Add provenance pull flow for official images
Add support for pulling signed images from a version 2 registry.
Only official images within the library namespace will be pull from the
new registry and check the build signature.

Signed-off-by: Derek McGowan <derek@mcgstyle.net> (github: dmcgowan)
2014-10-01 18:26:06 -07:00

386 lines
10 KiB
Go

package registry
import (
"encoding/json"
"fmt"
"io"
"io/ioutil"
"net/url"
"strconv"
"github.com/docker/docker/pkg/log"
"github.com/docker/docker/utils"
"github.com/gorilla/mux"
)
func newV2RegistryRouter() *mux.Router {
router := mux.NewRouter()
v2Router := router.PathPrefix("/v2/").Subrouter()
// Version Info
v2Router.Path("/version").Name("version")
// Image Manifests
v2Router.Path("/manifest/{imagename:[a-z0-9-._/]+}/{tagname:[a-zA-Z0-9-._]+}").Name("manifests")
// List Image Tags
v2Router.Path("/tags/{imagename:[a-z0-9-._/]+}").Name("tags")
// Download a blob
v2Router.Path("/blob/{imagename:[a-z0-9-._/]+}/{sumtype:[a-z0-9_+-]+}/{sum:[a-fA-F0-9]{4,}}").Name("downloadBlob")
// Upload a blob
v2Router.Path("/blob/{imagename:[a-z0-9-._/]+}/{sumtype:[a-z0-9_+-]+}").Name("uploadBlob")
// Mounting a blob in an image
v2Router.Path("/mountblob/{imagename:[a-z0-9-._/]+}/{sumtype:[a-z0-9_+-]+}/{sum:[a-fA-F0-9]{4,}}").Name("mountBlob")
return router
}
// APIVersion2 /v2/
var v2HTTPRoutes = newV2RegistryRouter()
func getV2URL(e *Endpoint, routeName string, vars map[string]string) (*url.URL, error) {
route := v2HTTPRoutes.Get(routeName)
if route == nil {
return nil, fmt.Errorf("unknown regisry v2 route name: %q", routeName)
}
varReplace := make([]string, 0, len(vars)*2)
for key, val := range vars {
varReplace = append(varReplace, key, val)
}
routePath, err := route.URLPath(varReplace...)
if err != nil {
return nil, fmt.Errorf("unable to make registry route %q with vars %v: %s", routeName, vars, err)
}
return &url.URL{
Scheme: e.URL.Scheme,
Host: e.URL.Host,
Path: routePath.Path,
}, nil
}
// V2 Provenance POC
func (r *Session) GetV2Version(token []string) (*RegistryInfo, error) {
routeURL, err := getV2URL(r.indexEndpoint, "version", nil)
if err != nil {
return nil, err
}
method := "GET"
log.Debugf("[registry] Calling %q %s", method, routeURL.String())
req, err := r.reqFactory.NewRequest(method, routeURL.String(), nil)
if err != nil {
return nil, err
}
setTokenAuth(req, token)
res, _, err := r.doRequest(req)
if err != nil {
return nil, err
}
defer res.Body.Close()
if res.StatusCode != 200 {
return nil, utils.NewHTTPRequestError(fmt.Sprintf("Server error: %d fetching Version", res.StatusCode), res)
}
decoder := json.NewDecoder(res.Body)
versionInfo := new(RegistryInfo)
err = decoder.Decode(versionInfo)
if err != nil {
return nil, fmt.Errorf("unable to decode GetV2Version JSON response: %s", err)
}
return versionInfo, nil
}
//
// 1) Check if TarSum of each layer exists /v2/
// 1.a) if 200, continue
// 1.b) if 300, then push the
// 1.c) if anything else, err
// 2) PUT the created/signed manifest
//
func (r *Session) GetV2ImageManifest(imageName, tagName string, token []string) ([]byte, error) {
vars := map[string]string{
"imagename": imageName,
"tagname": tagName,
}
routeURL, err := getV2URL(r.indexEndpoint, "manifests", vars)
if err != nil {
return nil, err
}
method := "GET"
log.Debugf("[registry] Calling %q %s", method, routeURL.String())
req, err := r.reqFactory.NewRequest(method, routeURL.String(), nil)
if err != nil {
return nil, err
}
setTokenAuth(req, token)
res, _, err := r.doRequest(req)
if err != nil {
return nil, err
}
defer res.Body.Close()
if res.StatusCode != 200 {
if res.StatusCode == 401 {
return nil, errLoginRequired
} else if res.StatusCode == 404 {
return nil, ErrDoesNotExist
}
return nil, utils.NewHTTPRequestError(fmt.Sprintf("Server error: %d trying to fetch for %s:%s", res.StatusCode, imageName, tagName), res)
}
buf, err := ioutil.ReadAll(res.Body)
if err != nil {
return nil, fmt.Errorf("Error while reading the http response: %s", err)
}
return buf, nil
}
// - Succeeded to mount for this image scope
// - Failed with no error (So continue to Push the Blob)
// - Failed with error
func (r *Session) PostV2ImageMountBlob(imageName, sumType, sum string, token []string) (bool, error) {
vars := map[string]string{
"imagename": imageName,
"sumtype": sumType,
"sum": sum,
}
routeURL, err := getV2URL(r.indexEndpoint, "mountBlob", vars)
if err != nil {
return false, err
}
method := "POST"
log.Debugf("[registry] Calling %q %s", method, routeURL.String())
req, err := r.reqFactory.NewRequest(method, routeURL.String(), nil)
if err != nil {
return false, err
}
setTokenAuth(req, token)
res, _, err := r.doRequest(req)
if err != nil {
return false, err
}
res.Body.Close() // close early, since we're not needing a body on this call .. yet?
switch res.StatusCode {
case 200:
// return something indicating no push needed
return true, nil
case 300:
// return something indicating blob push needed
return false, nil
}
return false, fmt.Errorf("Failed to mount %q - %s:%s : %d", imageName, sumType, sum, res.StatusCode)
}
func (r *Session) GetV2ImageBlob(imageName, sumType, sum string, blobWrtr io.Writer, token []string) error {
vars := map[string]string{
"imagename": imageName,
"sumtype": sumType,
"sum": sum,
}
routeURL, err := getV2URL(r.indexEndpoint, "downloadBlob", vars)
if err != nil {
return err
}
method := "GET"
log.Debugf("[registry] Calling %q %s", method, routeURL.String())
req, err := r.reqFactory.NewRequest(method, routeURL.String(), nil)
if err != nil {
return err
}
setTokenAuth(req, token)
res, _, err := r.doRequest(req)
if err != nil {
return err
}
defer res.Body.Close()
if res.StatusCode != 200 {
if res.StatusCode == 401 {
return errLoginRequired
}
return utils.NewHTTPRequestError(fmt.Sprintf("Server error: %d trying to pull %s blob", res.StatusCode, imageName), res)
}
_, err = io.Copy(blobWrtr, res.Body)
return err
}
func (r *Session) GetV2ImageBlobReader(imageName, sumType, sum string, token []string) (io.ReadCloser, int64, error) {
vars := map[string]string{
"imagename": imageName,
"sumtype": sumType,
"sum": sum,
}
routeURL, err := getV2URL(r.indexEndpoint, "downloadBlob", vars)
if err != nil {
return nil, 0, err
}
method := "GET"
log.Debugf("[registry] Calling %q %s", method, routeURL.String())
req, err := r.reqFactory.NewRequest(method, routeURL.String(), nil)
if err != nil {
return nil, 0, err
}
setTokenAuth(req, token)
res, _, err := r.doRequest(req)
if err != nil {
return nil, 0, err
}
if res.StatusCode != 200 {
if res.StatusCode == 401 {
return nil, 0, errLoginRequired
}
return nil, 0, utils.NewHTTPRequestError(fmt.Sprintf("Server error: %d trying to pull %s blob", res.StatusCode, imageName), res)
}
lenStr := res.Header.Get("Content-Length")
l, err := strconv.ParseInt(lenStr, 10, 64)
if err != nil {
return nil, 0, err
}
return res.Body, l, err
}
// Push the image to the server for storage.
// 'layer' is an uncompressed reader of the blob to be pushed.
// The server will generate it's own checksum calculation.
func (r *Session) PutV2ImageBlob(imageName, sumType string, blobRdr io.Reader, token []string) (serverChecksum string, err error) {
vars := map[string]string{
"imagename": imageName,
"sumtype": sumType,
}
routeURL, err := getV2URL(r.indexEndpoint, "uploadBlob", vars)
if err != nil {
return "", err
}
method := "PUT"
log.Debugf("[registry] Calling %q %s", method, routeURL.String())
req, err := r.reqFactory.NewRequest(method, routeURL.String(), blobRdr)
if err != nil {
return "", err
}
setTokenAuth(req, token)
res, _, err := r.doRequest(req)
if err != nil {
return "", err
}
defer res.Body.Close()
if res.StatusCode != 201 {
if res.StatusCode == 401 {
return "", errLoginRequired
}
return "", utils.NewHTTPRequestError(fmt.Sprintf("Server error: %d trying to push %s blob", res.StatusCode, imageName), res)
}
type sumReturn struct {
Checksum string `json:"checksum"`
}
decoder := json.NewDecoder(res.Body)
var sumInfo sumReturn
err = decoder.Decode(&sumInfo)
if err != nil {
return "", fmt.Errorf("unable to decode PutV2ImageBlob JSON response: %s", err)
}
// XXX this is a json struct from the registry, with its checksum
return sumInfo.Checksum, nil
}
// Finally Push the (signed) manifest of the blobs we've just pushed
func (r *Session) PutV2ImageManifest(imageName, tagName string, manifestRdr io.Reader, token []string) error {
vars := map[string]string{
"imagename": imageName,
"tagname": tagName,
}
routeURL, err := getV2URL(r.indexEndpoint, "manifests", vars)
if err != nil {
return err
}
method := "PUT"
log.Debugf("[registry] Calling %q %s", method, routeURL.String())
req, err := r.reqFactory.NewRequest(method, routeURL.String(), manifestRdr)
if err != nil {
return err
}
setTokenAuth(req, token)
res, _, err := r.doRequest(req)
if err != nil {
return err
}
res.Body.Close()
if res.StatusCode != 201 {
if res.StatusCode == 401 {
return errLoginRequired
}
return utils.NewHTTPRequestError(fmt.Sprintf("Server error: %d trying to push %s:%s manifest", res.StatusCode, imageName, tagName), res)
}
return nil
}
// Given a repository name, returns a json array of string tags
func (r *Session) GetV2RemoteTags(imageName string, token []string) ([]string, error) {
vars := map[string]string{
"imagename": imageName,
}
routeURL, err := getV2URL(r.indexEndpoint, "tags", vars)
if err != nil {
return nil, err
}
method := "GET"
log.Debugf("[registry] Calling %q %s", method, routeURL.String())
req, err := r.reqFactory.NewRequest(method, routeURL.String(), nil)
if err != nil {
return nil, err
}
setTokenAuth(req, token)
res, _, err := r.doRequest(req)
if err != nil {
return nil, err
}
defer res.Body.Close()
if res.StatusCode != 200 {
if res.StatusCode == 401 {
return nil, errLoginRequired
} else if res.StatusCode == 404 {
return nil, ErrDoesNotExist
}
return nil, utils.NewHTTPRequestError(fmt.Sprintf("Server error: %d trying to fetch for %s", res.StatusCode, imageName), res)
}
decoder := json.NewDecoder(res.Body)
var tags []string
err = decoder.Decode(&tags)
if err != nil {
return nil, fmt.Errorf("Error while decoding the http response: %s", err)
}
return tags, nil
}