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Minor cleanup/testing for HMAC upload tokens

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Changes configuration variable, lowercases private interface methods,
adds token sanity tests.
This commit is contained in:
Brian Bland 2015-01-05 14:25:28 -08:00
parent 07ba5db168
commit ea6c082e85
6 changed files with 135 additions and 15 deletions
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2
app.go
View file

@ -64,7 +64,7 @@ func NewApp(configuration configuration.Configuration) *App {
app.driver = driver
app.services = storage.NewServices(app.driver)
app.tokenProvider = newHMACTokenProvider(configuration.Cluster.Secret)
app.tokenProvider = newHMACTokenProvider(configuration.HTTP.Secret)
authType := configuration.Auth.Type()

5
configuration/configuration.go
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@ -32,13 +32,10 @@ type Configuration struct {
HTTP struct {
// Addr specifies the bind address for the registry instance.
Addr string `yaml:"addr"`
} `yaml:"http"`
// Cluster contains configuration parameters for clustering the registry.
Cluster struct {
// Secret specifies the secret key which HMAC tokens are created with.
Secret string `yaml:"secret"`
} `yaml:"cluster"`
} `yaml:"http"`
}
// v0_1Configuration is a Version 0.1 Configuration struct

4
layerupload.go
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@ -33,7 +33,7 @@ func layerUploadDispatcher(ctx *Context, r *http.Request) http.Handler {
if luh.UUID != "" {
luh.log = luh.log.WithField("uuid", luh.UUID)
state, err := ctx.tokenProvider.LayerUploadStateFromToken(r.FormValue("_state"))
state, err := ctx.tokenProvider.layerUploadStateFromToken(r.FormValue("_state"))
if err != nil {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
logrus.Infof("error resolving upload: %v", err)
@ -172,7 +172,7 @@ func (luh *layerUploadHandler) CancelLayerUpload(w http.ResponseWriter, r *http.
// left to the caller.
func (luh *layerUploadHandler) layerUploadResponse(w http.ResponseWriter, r *http.Request) error {
values := make(url.Values)
stateToken, err := luh.Context.tokenProvider.LayerUploadStateToToken(storage.LayerUploadState{Name: luh.Upload.Name(), UUID: luh.Upload.UUID(), Offset: luh.Upload.Offset()})
stateToken, err := luh.Context.tokenProvider.layerUploadStateToToken(storage.LayerUploadState{Name: luh.Upload.Name(), UUID: luh.Upload.UUID(), Offset: luh.Upload.Offset()})
if err != nil {
logrus.Infof("error building upload state token: %s", err)
return err

2
storage/layerupload.go
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@ -59,6 +59,8 @@ type layerUploadStore interface {
New(name string) (LayerUploadState, error)
Open(uuid string) (layerFile, error)
GetState(uuid string) (LayerUploadState, error)
// TODO: factor this method back in
// SaveState(lus LayerUploadState) error
DeleteState(uuid string) error
}

16
tokens.go
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@ -12,11 +12,11 @@ import (
// tokenProvider contains methods for serializing and deserializing state from token strings.
type tokenProvider interface {
// LayerUploadStateFromToken retrieves the LayerUploadState for a given state token.
LayerUploadStateFromToken(stateToken string) (storage.LayerUploadState, error)
// layerUploadStateFromToken retrieves the LayerUploadState for a given state token.
layerUploadStateFromToken(stateToken string) (storage.LayerUploadState, error)
// LayerUploadStateToToken returns a token string representing the given LayerUploadState.
LayerUploadStateToToken(layerUploadState storage.LayerUploadState) (string, error)
// layerUploadStateToToken returns a token string representing the given LayerUploadState.
layerUploadStateToToken(layerUploadState storage.LayerUploadState) (string, error)
}
type hmacTokenProvider struct {
@ -27,8 +27,8 @@ func newHMACTokenProvider(secret string) tokenProvider {
return &hmacTokenProvider{secret: secret}
}
// LayerUploadStateFromToken deserializes the given HMAC stateToken and validates the prefix HMAC
func (ts *hmacTokenProvider) LayerUploadStateFromToken(stateToken string) (storage.LayerUploadState, error) {
// layerUploadStateFromToken deserializes the given HMAC stateToken and validates the prefix HMAC
func (ts *hmacTokenProvider) layerUploadStateFromToken(stateToken string) (storage.LayerUploadState, error) {
var lus storage.LayerUploadState
tokenBytes, err := base64.URLEncoding.DecodeString(stateToken)
@ -56,8 +56,8 @@ func (ts *hmacTokenProvider) LayerUploadStateFromToken(stateToken string) (stora
return lus, nil
}
// LayerUploadStateToToken serializes the given LayerUploadState to JSON with an HMAC prepended
func (ts *hmacTokenProvider) LayerUploadStateToToken(lus storage.LayerUploadState) (string, error) {
// layerUploadStateToToken serializes the given LayerUploadState to JSON with an HMAC prepended
func (ts *hmacTokenProvider) layerUploadStateToToken(lus storage.LayerUploadState) (string, error) {
mac := hmac.New(sha256.New, []byte(ts.secret))
stateJSON := fmt.Sprintf("{\"Name\": \"%s\", \"UUID\": \"%s\", \"Offset\": %d}", lus.Name, lus.UUID, lus.Offset)
mac.Write([]byte(stateJSON))

121
tokens_test.go Normal file
View file

@ -0,0 +1,121 @@
package registry
import (
"testing"
"github.com/docker/distribution/storage"
)
var layerUploadStates = []storage.LayerUploadState{
{
Name: "hello",
UUID: "abcd-1234-qwer-0987",
Offset: 0,
},
{
Name: "hello-world",
UUID: "abcd-1234-qwer-0987",
Offset: 0,
},
{
Name: "h3ll0_w0rld",
UUID: "abcd-1234-qwer-0987",
Offset: 1337,
},
{
Name: "ABCDEFG",
UUID: "ABCD-1234-QWER-0987",
Offset: 1234567890,
},
{
Name: "this-is-A-sort-of-Long-name-for-Testing",
UUID: "dead-1234-beef-0987",
Offset: 8675309,
},
}
var secrets = []string{
"supersecret",
"12345",
"a",
"SuperSecret",
"Sup3r... S3cr3t!",
"This is a reasonably long secret key that is used for the purpose of testing.",
"\u2603+\u2744", // snowman+snowflake
}
// TestLayerUploadTokens constructs stateTokens from LayerUploadStates and
// validates that the tokens can be used to reconstruct the proper upload state.
func TestLayerUploadTokens(t *testing.T) {
tokenProvider := newHMACTokenProvider("supersecret")
for _, testcase := range layerUploadStates {
token, err := tokenProvider.layerUploadStateToToken(testcase)
if err != nil {
t.Fatal(err)
}
lus, err := tokenProvider.layerUploadStateFromToken(token)
if err != nil {
t.Fatal(err)
}
assertLayerUploadStateEquals(t, testcase, lus)
}
}
// TestHMACValidate ensures that any HMAC token providers are compatible if and
// only if they share the same secret.
func TestHMACValidation(t *testing.T) {
for _, secret := range secrets {
tokenProvider1 := newHMACTokenProvider(secret)
tokenProvider2 := newHMACTokenProvider(secret)
badTokenProvider := newHMACTokenProvider("DifferentSecret")
for _, testcase := range layerUploadStates {
token, err := tokenProvider1.layerUploadStateToToken(testcase)
if err != nil {
t.Fatal(err)
}
lus, err := tokenProvider2.layerUploadStateFromToken(token)
if err != nil {
t.Fatal(err)
}
assertLayerUploadStateEquals(t, testcase, lus)
_, err = badTokenProvider.layerUploadStateFromToken(token)
if err == nil {
t.Fatalf("Expected token provider to fail at retrieving state from token: %s", token)
}
badToken, err := badTokenProvider.layerUploadStateToToken(testcase)
if err != nil {
t.Fatal(err)
}
_, err = tokenProvider1.layerUploadStateFromToken(badToken)
if err == nil {
t.Fatalf("Expected token provider to fail at retrieving state from token: %s", badToken)
}
_, err = tokenProvider2.layerUploadStateFromToken(badToken)
if err == nil {
t.Fatalf("Expected token provider to fail at retrieving state from token: %s", badToken)
}
}
}
}
func assertLayerUploadStateEquals(t *testing.T, expected storage.LayerUploadState, received storage.LayerUploadState) {
if expected.Name != received.Name {
t.Fatalf("Expected Name=%q, Received Name=%q", expected.Name, received.Name)
}
if expected.UUID != received.UUID {
t.Fatalf("Expected UUID=%q, Received UUID=%q", expected.UUID, received.UUID)
}
if expected.Offset != received.Offset {
t.Fatalf("Expected Offset=%d, Received Offset=%d", expected.Offset, received.Offset)
}
}