cff1a5ffdc
See: d796729b6b/registry/handlers/app.go (L498)
Per the comment on line 498, this moves the logic of setting the http
status code into the serveJSON func, leaving the auth.Challenge.ServeHTTP()
func to just set the auth challenge header.
Signed-off-by: Doug Davis <dug@us.ibm.com>
95 lines
2.6 KiB
Go
95 lines
2.6 KiB
Go
// Package silly provides a simple authentication scheme that checks for the
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// existence of an Authorization header and issues access if is present and
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// non-empty.
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//
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// This package is present as an example implementation of a minimal
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// auth.AccessController and for testing. This is not suitable for any kind of
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// production security.
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package silly
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import (
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"fmt"
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"net/http"
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"strings"
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ctxu "github.com/docker/distribution/context"
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"github.com/docker/distribution/registry/auth"
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"golang.org/x/net/context"
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)
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// accessController provides a simple implementation of auth.AccessController
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// that simply checks for a non-empty Authorization header. It is useful for
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// demonstration and testing.
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type accessController struct {
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realm string
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service string
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}
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var _ auth.AccessController = &accessController{}
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func newAccessController(options map[string]interface{}) (auth.AccessController, error) {
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realm, present := options["realm"]
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if _, ok := realm.(string); !present || !ok {
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return nil, fmt.Errorf(`"realm" must be set for silly access controller`)
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}
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service, present := options["service"]
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if _, ok := service.(string); !present || !ok {
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return nil, fmt.Errorf(`"service" must be set for silly access controller`)
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}
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return &accessController{realm: realm.(string), service: service.(string)}, nil
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}
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// Authorized simply checks for the existence of the authorization header,
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// responding with a bearer challenge if it doesn't exist.
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func (ac *accessController) Authorized(ctx context.Context, accessRecords ...auth.Access) (context.Context, error) {
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req, err := ctxu.GetRequest(ctx)
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if err != nil {
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return nil, err
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}
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if req.Header.Get("Authorization") == "" {
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challenge := challenge{
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realm: ac.realm,
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service: ac.service,
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}
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if len(accessRecords) > 0 {
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var scopes []string
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for _, access := range accessRecords {
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scopes = append(scopes, fmt.Sprintf("%s:%s:%s", access.Type, access.Resource.Name, access.Action))
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}
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challenge.scope = strings.Join(scopes, " ")
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}
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return nil, &challenge
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}
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return auth.WithUser(ctx, auth.UserInfo{Name: "silly"}), nil
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}
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type challenge struct {
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realm string
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service string
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scope string
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}
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func (ch *challenge) ServeHTTP(w http.ResponseWriter, r *http.Request) {
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header := fmt.Sprintf("Bearer realm=%q,service=%q", ch.realm, ch.service)
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if ch.scope != "" {
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header = fmt.Sprintf("%s,scope=%q", header, ch.scope)
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}
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w.Header().Set("WWW-Authenticate", header)
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}
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func (ch *challenge) Error() string {
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return fmt.Sprintf("silly authentication challenge: %#v", ch)
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}
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// init registers the silly auth backend.
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func init() {
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auth.Register("silly", auth.InitFunc(newAccessController))
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}
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