forked from TrueCloudLab/distribution
Add expires_in and issued_at to the auth spec.
This extends the specification for the Bearer token response to include information pertaining to when an issued Bearer token will expire. This also allows the client to accept `access_token` as an alias for `token`. Signed-off-by: Matt Moore <mattmoor@google.com>
This commit is contained in:
Matt Moore
parent
1c5f8166e4
commit
0c7cd3fcf8
3 changed files with 392 additions and 17 deletions
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@ -113,6 +113,45 @@ challenge, the client will need to make a `GET` request to the URL
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</dd>
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</dl>
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#### Token Response Fields
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<dl>
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<dt>
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<code>token</code>
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</dt>
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<dd>
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An opaque <code>Bearer</code> token that clients should supply to subsequent
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requests in the <code>Authorization</code> header.
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</dd>
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<dt>
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<code>access_token</code>
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</dt>
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<dd>
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For compatibility with OAuth 2.0, we will also accept <code>token</code> under the name
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<code>access_token</code>. At least one of these fields <b>must</b> be specified, but
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both may also appear (for compatibility with older clients). When both are specified,
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they should be equivalent; if they differ the client's choice is undefined.
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</dd>
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<dt>
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<code>expires_in</code>
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</dt>
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<dd>
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(Optional) The duration in seconds since the token was issued that it
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will remain valid. When omitted, this defaults to 60 seconds. For
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compatibility with older clients, a token should never be returned with
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less than 60 seconds to live.
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</dd>
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<dt>
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<code>issued_at</code>
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</dt>
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<dd>
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(Optional) The <a href="https://www.ietf.org/rfc/rfc3339.txt">RFC3339</a>-serialized UTC
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standard time at which a given token was issued. If <code>issued_at</code> is omitted, the
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expiration is from when the token exchange completed.
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</dd>
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</dl>
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#### Example
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For this example, the client makes an HTTP GET request to the following URL:
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@ -159,15 +198,16 @@ It is this intersected set of access which is placed in the returned token.
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The server then constructs an implementation-specific token with this
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intersected set of access, and returns it to the Docker client to use to
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authenticate to the audience service:
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authenticate to the audience service (within the indicated window of time):
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```
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HTTP/1.1 200 OK
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Content-Type: application/json
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{"token": "eyJ0eXAiOiJKV1QiLCJhbGciOiJFUzI1NiIsImtpZCI6IlBZWU86VEVXVTpWN0pIOjI2SlY6QVFUWjpMSkMzOlNYVko6WEdIQTozNEYyOjJMQVE6WlJNSzpaN1E2In0.eyJpc3MiOiJhdXRoLmRvY2tlci5jb20iLCJzdWIiOiJqbGhhd24iLCJhdWQiOiJyZWdpc3RyeS5kb2NrZXIuY29tIiwiZXhwIjoxNDE1Mzg3MzE1LCJuYmYiOjE0MTUzODcwMTUsImlhdCI6MTQxNTM4NzAxNSwianRpIjoidFlKQ08xYzZjbnl5N2tBbjBjN3JLUGdiVjFIMWJGd3MiLCJhY2Nlc3MiOlt7InR5cGUiOiJyZXBvc2l0b3J5IiwibmFtZSI6InNhbWFsYmEvbXktYXBwIiwiYWN0aW9ucyI6WyJwdXNoIl19XX0.QhflHPfbd6eVF4lM9bwYpFZIV0PfikbyXuLx959ykRTBpe3CYnzs6YBK8FToVb5R47920PVLrh8zuLzdCr9t3w"}
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{"token": "eyJ0eXAiOiJKV1QiLCJhbGciOiJFUzI1NiIsImtpZCI6IlBZWU86VEVXVTpWN0pIOjI2SlY6QVFUWjpMSkMzOlNYVko6WEdIQTozNEYyOjJMQVE6WlJNSzpaN1E2In0.eyJpc3MiOiJhdXRoLmRvY2tlci5jb20iLCJzdWIiOiJqbGhhd24iLCJhdWQiOiJyZWdpc3RyeS5kb2NrZXIuY29tIiwiZXhwIjoxNDE1Mzg3MzE1LCJuYmYiOjE0MTUzODcwMTUsImlhdCI6MTQxNTM4NzAxNSwianRpIjoidFlKQ08xYzZjbnl5N2tBbjBjN3JLUGdiVjFIMWJGd3MiLCJhY2Nlc3MiOlt7InR5cGUiOiJyZXBvc2l0b3J5IiwibmFtZSI6InNhbWFsYmEvbXktYXBwIiwiYWN0aW9ucyI6WyJwdXNoIl19XX0.QhflHPfbd6eVF4lM9bwYpFZIV0PfikbyXuLx959ykRTBpe3CYnzs6YBK8FToVb5R47920PVLrh8zuLzdCr9t3w", "expires_in": "3600","issued_at": "2009-11-10T23:00:00Z"}
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```
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## Using the Bearer token
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Once the client has a token, it will try the registry request again with the
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@ -10,6 +10,7 @@ import (
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"sync"
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"time"
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"github.com/Sirupsen/logrus"
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"github.com/docker/distribution/registry/client"
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"github.com/docker/distribution/registry/client/transport"
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)
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@ -85,11 +86,24 @@ func (ea *endpointAuthorizer) ModifyRequest(req *http.Request) error {
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return nil
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}
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// This is the minimum duration a token can last (in seconds).
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// A token must not live less than 60 seconds because older versions
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// of the Docker client didn't read their expiration from the token
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// response and assumed 60 seconds. So to remain compatible with
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// those implementations, a token must live at least this long.
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const minimumTokenLifetimeSeconds = 60
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// Private interface for time used by this package to enable tests to provide their own implementation.
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type clock interface {
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Now() time.Time
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}
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type tokenHandler struct {
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header http.Header
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creds CredentialStore
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scope tokenScope
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transport http.RoundTripper
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clock clock
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tokenLock sync.Mutex
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tokenCache string
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@ -108,12 +122,24 @@ func (ts tokenScope) String() string {
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return fmt.Sprintf("%s:%s:%s", ts.Resource, ts.Scope, strings.Join(ts.Actions, ","))
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}
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// An implementation of clock for providing real time data.
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type realClock struct{}
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// Now implements clock
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func (realClock) Now() time.Time { return time.Now() }
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// NewTokenHandler creates a new AuthenicationHandler which supports
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// fetching tokens from a remote token server.
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func NewTokenHandler(transport http.RoundTripper, creds CredentialStore, scope string, actions ...string) AuthenticationHandler {
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return newTokenHandler(transport, creds, realClock{}, scope, actions...)
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}
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// newTokenHandler exposes the option to provide a clock to manipulate time in unit testing.
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func newTokenHandler(transport http.RoundTripper, creds CredentialStore, c clock, scope string, actions ...string) AuthenticationHandler {
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return &tokenHandler{
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transport: transport,
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creds: creds,
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clock: c,
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scope: tokenScope{
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Resource: "repository",
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Scope: scope,
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@ -146,40 +172,43 @@ func (th *tokenHandler) AuthorizeRequest(req *http.Request, params map[string]st
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func (th *tokenHandler) refreshToken(params map[string]string) error {
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th.tokenLock.Lock()
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defer th.tokenLock.Unlock()
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now := time.Now()
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now := th.clock.Now()
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if now.After(th.tokenExpiration) {
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token, err := th.fetchToken(params)
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tr, err := th.fetchToken(params)
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if err != nil {
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return err
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}
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th.tokenCache = token
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th.tokenExpiration = now.Add(time.Minute)
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th.tokenCache = tr.Token
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th.tokenExpiration = tr.IssuedAt.Add(time.Duration(tr.ExpiresIn) * time.Second)
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}
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return nil
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}
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type tokenResponse struct {
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Token string `json:"token"`
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Token string `json:"token"`
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AccessToken string `json:"access_token"`
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ExpiresIn int `json:"expires_in"`
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IssuedAt time.Time `json:"issued_at"`
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}
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func (th *tokenHandler) fetchToken(params map[string]string) (token string, err error) {
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func (th *tokenHandler) fetchToken(params map[string]string) (token *tokenResponse, err error) {
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//log.Debugf("Getting bearer token with %s for %s", challenge.Parameters, ta.auth.Username)
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realm, ok := params["realm"]
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if !ok {
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return "", errors.New("no realm specified for token auth challenge")
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return nil, errors.New("no realm specified for token auth challenge")
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}
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// TODO(dmcgowan): Handle empty scheme
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realmURL, err := url.Parse(realm)
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if err != nil {
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return "", fmt.Errorf("invalid token auth challenge realm: %s", err)
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return nil, fmt.Errorf("invalid token auth challenge realm: %s", err)
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}
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req, err := http.NewRequest("GET", realmURL.String(), nil)
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if err != nil {
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return "", err
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return nil, err
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}
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reqParams := req.URL.Query()
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@ -206,26 +235,44 @@ func (th *tokenHandler) fetchToken(params map[string]string) (token string, err
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resp, err := th.client().Do(req)
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if err != nil {
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return "", err
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return nil, err
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}
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defer resp.Body.Close()
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if !client.SuccessStatus(resp.StatusCode) {
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return "", fmt.Errorf("token auth attempt for registry: %s request failed with status: %d %s", req.URL, resp.StatusCode, http.StatusText(resp.StatusCode))
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return nil, fmt.Errorf("token auth attempt for registry: %s request failed with status: %d %s", req.URL, resp.StatusCode, http.StatusText(resp.StatusCode))
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}
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decoder := json.NewDecoder(resp.Body)
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tr := new(tokenResponse)
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if err = decoder.Decode(tr); err != nil {
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return "", fmt.Errorf("unable to decode token response: %s", err)
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return nil, fmt.Errorf("unable to decode token response: %s", err)
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}
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// `access_token` is equivalent to `token` and if both are specified
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// the choice is undefined. Canonicalize `access_token` by sticking
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// things in `token`.
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if tr.AccessToken != "" {
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tr.Token = tr.AccessToken
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}
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if tr.Token == "" {
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return "", errors.New("authorization server did not include a token in the response")
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return nil, errors.New("authorization server did not include a token in the response")
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}
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return tr.Token, nil
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if tr.ExpiresIn < minimumTokenLifetimeSeconds {
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logrus.Debugf("Increasing token expiration to: %d seconds", tr.ExpiresIn)
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// The default/minimum lifetime.
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tr.ExpiresIn = minimumTokenLifetimeSeconds
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}
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if tr.IssuedAt.IsZero() {
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// issued_at is optional in the token response.
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tr.IssuedAt = th.clock.Now()
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}
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return tr, nil
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}
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type basicHandler struct {
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@ -7,11 +7,20 @@ import (
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"net/http/httptest"
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"net/url"
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"testing"
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"time"
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"github.com/docker/distribution/registry/client/transport"
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"github.com/docker/distribution/testutil"
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)
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// An implementation of clock for providing fake time data.
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type fakeClock struct {
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current time.Time
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}
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// Now implements clock
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func (fc *fakeClock) Now() time.Time { return fc.current }
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func testServer(rrm testutil.RequestResponseMap) (string, func()) {
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h := testutil.NewHandler(rrm)
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s := httptest.NewServer(h)
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@ -210,7 +219,7 @@ func TestEndpointAuthorizeTokenBasic(t *testing.T) {
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},
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Response: testutil.Response{
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StatusCode: http.StatusOK,
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Body: []byte(`{"token":"statictoken"}`),
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Body: []byte(`{"access_token":"statictoken"}`),
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},
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},
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})
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@ -265,6 +274,285 @@ func TestEndpointAuthorizeTokenBasic(t *testing.T) {
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}
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}
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func TestEndpointAuthorizeTokenBasicWithExpiresIn(t *testing.T) {
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service := "localhost.localdomain"
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repo := "some/fun/registry"
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scope := fmt.Sprintf("repository:%s:pull,push", repo)
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username := "tokenuser"
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password := "superSecretPa$$word"
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tokenMap := testutil.RequestResponseMap([]testutil.RequestResponseMapping{
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{
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Request: testutil.Request{
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Method: "GET",
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Route: fmt.Sprintf("/token?account=%s&scope=%s&service=%s", username, url.QueryEscape(scope), service),
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},
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Response: testutil.Response{
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StatusCode: http.StatusOK,
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Body: []byte(`{"token":"statictoken", "expires_in": 3001}`),
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},
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},
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{
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Request: testutil.Request{
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Method: "GET",
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Route: fmt.Sprintf("/token?account=%s&scope=%s&service=%s", username, url.QueryEscape(scope), service),
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},
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Response: testutil.Response{
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StatusCode: http.StatusOK,
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Body: []byte(`{"access_token":"statictoken", "expires_in": 3001}`),
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},
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},
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})
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authenicate1 := fmt.Sprintf("Basic realm=localhost")
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tokenExchanges := 0
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basicCheck := func(a string) bool {
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tokenExchanges = tokenExchanges + 1
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return a == fmt.Sprintf("Basic %s", basicAuth(username, password))
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}
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te, tc := testServerWithAuth(tokenMap, authenicate1, basicCheck)
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defer tc()
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m := testutil.RequestResponseMap([]testutil.RequestResponseMapping{
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{
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Request: testutil.Request{
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Method: "GET",
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Route: "/v2/hello",
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},
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Response: testutil.Response{
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StatusCode: http.StatusAccepted,
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},
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},
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{
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Request: testutil.Request{
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Method: "GET",
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Route: "/v2/hello",
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},
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Response: testutil.Response{
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StatusCode: http.StatusAccepted,
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},
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},
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{
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Request: testutil.Request{
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Method: "GET",
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Route: "/v2/hello",
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},
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Response: testutil.Response{
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StatusCode: http.StatusAccepted,
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},
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},
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{
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Request: testutil.Request{
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Method: "GET",
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Route: "/v2/hello",
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},
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Response: testutil.Response{
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StatusCode: http.StatusAccepted,
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},
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},
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{
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Request: testutil.Request{
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Method: "GET",
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Route: "/v2/hello",
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},
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Response: testutil.Response{
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StatusCode: http.StatusAccepted,
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},
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},
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})
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authenicate2 := fmt.Sprintf("Bearer realm=%q,service=%q", te+"/token", service)
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bearerCheck := func(a string) bool {
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return a == "Bearer statictoken"
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}
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e, c := testServerWithAuth(m, authenicate2, bearerCheck)
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defer c()
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creds := &testCredentialStore{
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username: username,
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password: password,
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}
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challengeManager := NewSimpleChallengeManager()
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_, err := ping(challengeManager, e+"/v2/", "")
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if err != nil {
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t.Fatal(err)
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}
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clock := &fakeClock{current: time.Now()}
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transport1 := transport.NewTransport(nil, NewAuthorizer(challengeManager, newTokenHandler(nil, creds, clock, repo, "pull", "push"), NewBasicHandler(creds)))
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client := &http.Client{Transport: transport1}
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// First call should result in a token exchange
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// Subsequent calls should recycle the token from the first request, until the expiration has lapsed.
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timeIncrement := 1000 * time.Second
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for i := 0; i < 4; i++ {
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req, _ := http.NewRequest("GET", e+"/v2/hello", nil)
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resp, err := client.Do(req)
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if err != nil {
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t.Fatalf("Error sending get request: %s", err)
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}
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if resp.StatusCode != http.StatusAccepted {
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t.Fatalf("Unexpected status code: %d, expected %d", resp.StatusCode, http.StatusAccepted)
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}
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if tokenExchanges != 1 {
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t.Fatalf("Unexpected number of token exchanges, want: 1, got %d (iteration: %d)", tokenExchanges, i)
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}
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clock.current = clock.current.Add(timeIncrement)
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}
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// After we've exceeded the expiration, we should see a second token exchange.
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req, _ := http.NewRequest("GET", e+"/v2/hello", nil)
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resp, err := client.Do(req)
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if err != nil {
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t.Fatalf("Error sending get request: %s", err)
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}
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if resp.StatusCode != http.StatusAccepted {
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t.Fatalf("Unexpected status code: %d, expected %d", resp.StatusCode, http.StatusAccepted)
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}
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if tokenExchanges != 2 {
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t.Fatalf("Unexpected number of token exchanges, want: 2, got %d", tokenExchanges)
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}
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}
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func TestEndpointAuthorizeTokenBasicWithExpiresInAndIssuedAt(t *testing.T) {
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service := "localhost.localdomain"
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repo := "some/fun/registry"
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scope := fmt.Sprintf("repository:%s:pull,push", repo)
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username := "tokenuser"
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password := "superSecretPa$$word"
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// This test sets things up such that the token was issued one increment
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// earlier than its sibling in TestEndpointAuthorizeTokenBasicWithExpiresIn.
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// This will mean that the token expires after 3 increments instead of 4.
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clock := &fakeClock{current: time.Now()}
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timeIncrement := 1000 * time.Second
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firstIssuedAt := clock.Now()
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clock.current = clock.current.Add(timeIncrement)
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secondIssuedAt := clock.current.Add(2 * timeIncrement)
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tokenMap := testutil.RequestResponseMap([]testutil.RequestResponseMapping{
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{
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Request: testutil.Request{
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Method: "GET",
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Route: fmt.Sprintf("/token?account=%s&scope=%s&service=%s", username, url.QueryEscape(scope), service),
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},
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Response: testutil.Response{
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||||
StatusCode: http.StatusOK,
|
||||
Body: []byte(`{"token":"statictoken", "issued_at": "` + firstIssuedAt.Format(time.RFC3339Nano) + `", "expires_in": 3001}`),
|
||||
},
|
||||
},
|
||||
{
|
||||
Request: testutil.Request{
|
||||
Method: "GET",
|
||||
Route: fmt.Sprintf("/token?account=%s&scope=%s&service=%s", username, url.QueryEscape(scope), service),
|
||||
},
|
||||
Response: testutil.Response{
|
||||
StatusCode: http.StatusOK,
|
||||
Body: []byte(`{"access_token":"statictoken", "issued_at": "` + secondIssuedAt.Format(time.RFC3339Nano) + `", "expires_in": 3001}`),
|
||||
},
|
||||
},
|
||||
})
|
||||
|
||||
authenicate1 := fmt.Sprintf("Basic realm=localhost")
|
||||
tokenExchanges := 0
|
||||
basicCheck := func(a string) bool {
|
||||
tokenExchanges = tokenExchanges + 1
|
||||
return a == fmt.Sprintf("Basic %s", basicAuth(username, password))
|
||||
}
|
||||
te, tc := testServerWithAuth(tokenMap, authenicate1, basicCheck)
|
||||
defer tc()
|
||||
|
||||
m := testutil.RequestResponseMap([]testutil.RequestResponseMapping{
|
||||
{
|
||||
Request: testutil.Request{
|
||||
Method: "GET",
|
||||
Route: "/v2/hello",
|
||||
},
|
||||
Response: testutil.Response{
|
||||
StatusCode: http.StatusAccepted,
|
||||
},
|
||||
},
|
||||
{
|
||||
Request: testutil.Request{
|
||||
Method: "GET",
|
||||
Route: "/v2/hello",
|
||||
},
|
||||
Response: testutil.Response{
|
||||
StatusCode: http.StatusAccepted,
|
||||
},
|
||||
},
|
||||
{
|
||||
Request: testutil.Request{
|
||||
Method: "GET",
|
||||
Route: "/v2/hello",
|
||||
},
|
||||
Response: testutil.Response{
|
||||
StatusCode: http.StatusAccepted,
|
||||
},
|
||||
},
|
||||
{
|
||||
Request: testutil.Request{
|
||||
Method: "GET",
|
||||
Route: "/v2/hello",
|
||||
},
|
||||
Response: testutil.Response{
|
||||
StatusCode: http.StatusAccepted,
|
||||
},
|
||||
},
|
||||
})
|
||||
|
||||
authenicate2 := fmt.Sprintf("Bearer realm=%q,service=%q", te+"/token", service)
|
||||
bearerCheck := func(a string) bool {
|
||||
return a == "Bearer statictoken"
|
||||
}
|
||||
e, c := testServerWithAuth(m, authenicate2, bearerCheck)
|
||||
defer c()
|
||||
|
||||
creds := &testCredentialStore{
|
||||
username: username,
|
||||
password: password,
|
||||
}
|
||||
|
||||
challengeManager := NewSimpleChallengeManager()
|
||||
_, err := ping(challengeManager, e+"/v2/", "")
|
||||
if err != nil {
|
||||
t.Fatal(err)
|
||||
}
|
||||
transport1 := transport.NewTransport(nil, NewAuthorizer(challengeManager, newTokenHandler(nil, creds, clock, repo, "pull", "push"), NewBasicHandler(creds)))
|
||||
client := &http.Client{Transport: transport1}
|
||||
|
||||
// First call should result in a token exchange
|
||||
// Subsequent calls should recycle the token from the first request, until the expiration has lapsed.
|
||||
// We shaved one increment off of the equivalent logic in TestEndpointAuthorizeTokenBasicWithExpiresIn
|
||||
// so this loop should have one fewer iteration.
|
||||
for i := 0; i < 3; i++ {
|
||||
req, _ := http.NewRequest("GET", e+"/v2/hello", nil)
|
||||
resp, err := client.Do(req)
|
||||
if err != nil {
|
||||
t.Fatalf("Error sending get request: %s", err)
|
||||
}
|
||||
if resp.StatusCode != http.StatusAccepted {
|
||||
t.Fatalf("Unexpected status code: %d, expected %d", resp.StatusCode, http.StatusAccepted)
|
||||
}
|
||||
if tokenExchanges != 1 {
|
||||
t.Fatalf("Unexpected number of token exchanges, want: 1, got %d (iteration: %d)", tokenExchanges, i)
|
||||
}
|
||||
clock.current = clock.current.Add(timeIncrement)
|
||||
}
|
||||
|
||||
// After we've exceeded the expiration, we should see a second token exchange.
|
||||
req, _ := http.NewRequest("GET", e+"/v2/hello", nil)
|
||||
resp, err := client.Do(req)
|
||||
if err != nil {
|
||||
t.Fatalf("Error sending get request: %s", err)
|
||||
}
|
||||
if resp.StatusCode != http.StatusAccepted {
|
||||
t.Fatalf("Unexpected status code: %d, expected %d", resp.StatusCode, http.StatusAccepted)
|
||||
}
|
||||
if tokenExchanges != 2 {
|
||||
t.Fatalf("Unexpected number of token exchanges, want: 2, got %d", tokenExchanges)
|
||||
}
|
||||
}
|
||||
|
||||
func TestEndpointAuthorizeBasic(t *testing.T) {
|
||||
m := testutil.RequestResponseMap([]testutil.RequestResponseMapping{
|
||||
{
|
||||
|
|
|
|||
Loading…
Reference in a new issue