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moby--moby/integration-cli/registry/registry.go

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package registry
import (
"fmt"
"io/ioutil"
"net/http"
"os"
"os/exec"
"path/filepath"
"github.com/opencontainers/go-digest"
)
const (
v2binary = "registry-v2"
v2binarySchema1 = "registry-v2-schema1"
)
type testingT interface {
logT
Fatal(...interface{})
Fatalf(string, ...interface{})
}
type logT interface {
Logf(string, ...interface{})
}
// V2 represent a registry version 2
type V2 struct {
cmd *exec.Cmd
registryURL string
dir string
auth string
username string
password string
email string
}
// NewV2 creates a v2 registry server
func NewV2(schema1 bool, auth, tokenURL, registryURL string) (*V2, error) {
tmp, err := ioutil.TempDir("", "registry-test-")
if err != nil {
return nil, err
}
template := `version: 0.1
loglevel: debug
storage:
filesystem:
rootdirectory: %s
http:
addr: %s
%s`
var (
authTemplate string
username string
password string
email string
)
switch auth {
case "htpasswd":
htpasswdPath := filepath.Join(tmp, "htpasswd")
// generated with: htpasswd -Bbn testuser testpassword
userpasswd := "testuser:$2y$05$sBsSqk0OpSD1uTZkHXc4FeJ0Z70wLQdAX/82UiHuQOKbNbBrzs63m"
username = "testuser"
password = "testpassword"
email = "test@test.org"
if err := ioutil.WriteFile(htpasswdPath, []byte(userpasswd), os.FileMode(0644)); err != nil {
return nil, err
}
authTemplate = fmt.Sprintf(`auth:
htpasswd:
realm: basic-realm
path: %s
`, htpasswdPath)
case "token":
authTemplate = fmt.Sprintf(`auth:
token:
realm: %s
service: "registry"
issuer: "auth-registry"
rootcertbundle: "fixtures/registry/cert.pem"
`, tokenURL)
}
confPath := filepath.Join(tmp, "config.yaml")
config, err := os.Create(confPath)
if err != nil {
return nil, err
}
defer config.Close()
if _, err := fmt.Fprintf(config, template, tmp, registryURL, authTemplate); err != nil {
os.RemoveAll(tmp)
return nil, err
}
binary := v2binary
if schema1 {
binary = v2binarySchema1
}
cmd := exec.Command(binary, confPath)
if err := cmd.Start(); err != nil {
os.RemoveAll(tmp)
return nil, err
}
return &V2{
cmd: cmd,
dir: tmp,
auth: auth,
username: username,
password: password,
email: email,
registryURL: registryURL,
}, nil
}
// Ping sends an http request to the current registry, and fail if it doesn't respond correctly
func (r *V2) Ping() error {
// We always ping through HTTP for our test registry.
resp, err := http.Get(fmt.Sprintf("http://%s/v2/", r.registryURL))
if err != nil {
return err
}
resp.Body.Close()
fail := resp.StatusCode != http.StatusOK
if r.auth != "" {
// unauthorized is a _good_ status when pinging v2/ and it needs auth
fail = fail && resp.StatusCode != http.StatusUnauthorized
}
if fail {
return fmt.Errorf("registry ping replied with an unexpected status code %d", resp.StatusCode)
}
return nil
}
// Close kills the registry server
func (r *V2) Close() {
r.cmd.Process.Kill()
r.cmd.Process.Wait()
os.RemoveAll(r.dir)
}
func (r *V2) getBlobFilename(blobDigest digest.Digest) string {
// Split the digest into its algorithm and hex components.
dgstAlg, dgstHex := blobDigest.Algorithm(), blobDigest.Hex()
// The path to the target blob data looks something like:
// baseDir + "docker/registry/v2/blobs/sha256/a3/a3ed...46d4/data"
return fmt.Sprintf("%s/docker/registry/v2/blobs/%s/%s/%s/data", r.dir, dgstAlg, dgstHex[:2], dgstHex)
}
// ReadBlobContents read the file corresponding to the specified digest
func (r *V2) ReadBlobContents(t testingT, blobDigest digest.Digest) []byte {
// Load the target manifest blob.
manifestBlob, err := ioutil.ReadFile(r.getBlobFilename(blobDigest))
if err != nil {
t.Fatalf("unable to read blob: %s", err)
}
return manifestBlob
}
// WriteBlobContents write the file corresponding to the specified digest with the given content
func (r *V2) WriteBlobContents(t testingT, blobDigest digest.Digest, data []byte) {
if err := ioutil.WriteFile(r.getBlobFilename(blobDigest), data, os.FileMode(0644)); err != nil {
t.Fatalf("unable to write malicious data blob: %s", err)
}
}
// TempMoveBlobData moves the existing data file aside, so that we can replace it with a
// malicious blob of data for example.
func (r *V2) TempMoveBlobData(t testingT, blobDigest digest.Digest) (undo func()) {
tempFile, err := ioutil.TempFile("", "registry-temp-blob-")
if err != nil {
t.Fatalf("unable to get temporary blob file: %s", err)
}
tempFile.Close()
blobFilename := r.getBlobFilename(blobDigest)
// Move the existing data file aside, so that we can replace it with a
// another blob of data.
if err := os.Rename(blobFilename, tempFile.Name()); err != nil {
os.Remove(tempFile.Name())
t.Fatalf("unable to move data blob: %s", err)
}
return func() {
os.Rename(tempFile.Name(), blobFilename)
os.Remove(tempFile.Name())
}
}
// Username returns the configured user name of the server
func (r *V2) Username() string {
return r.username
}
// Password returns the configured password of the server
func (r *V2) Password() string {
return r.password
}
// Email returns the configured email of the server
func (r *V2) Email() string {
return r.email
}
// Path returns the path where the registry write data
func (r *V2) Path() string {
return filepath.Join(r.dir, "docker", "registry", "v2")
}