102 lines
2.6 KiB
Go
102 lines
2.6 KiB
Go
// Package htpasswd provides a simple authentication scheme that checks for the
|
|
// user credential hash in an htpasswd formatted file in a configuration-determined
|
|
// location.
|
|
//
|
|
// This authentication method MUST be used under TLS, as simple token-replay attack is possible.
|
|
package htpasswd
|
|
|
|
import (
|
|
"errors"
|
|
"fmt"
|
|
"net/http"
|
|
"os"
|
|
|
|
"github.com/docker/distribution/context"
|
|
"github.com/docker/distribution/registry/auth"
|
|
)
|
|
|
|
var (
|
|
// ErrInvalidCredential is returned when the auth token does not authenticate correctly.
|
|
ErrInvalidCredential = errors.New("invalid authorization credential")
|
|
|
|
// ErrAuthenticationFailure returned when authentication failure to be presented to agent.
|
|
ErrAuthenticationFailure = errors.New("authentication failured")
|
|
)
|
|
|
|
type accessController struct {
|
|
realm string
|
|
htpasswd *htpasswd
|
|
}
|
|
|
|
var _ auth.AccessController = &accessController{}
|
|
|
|
func newAccessController(options map[string]interface{}) (auth.AccessController, error) {
|
|
realm, present := options["realm"]
|
|
if _, ok := realm.(string); !present || !ok {
|
|
return nil, fmt.Errorf(`"realm" must be set for htpasswd access controller`)
|
|
}
|
|
|
|
path, present := options["path"]
|
|
if _, ok := path.(string); !present || !ok {
|
|
return nil, fmt.Errorf(`"path" must be set for htpasswd access controller`)
|
|
}
|
|
|
|
f, err := os.Open(path.(string))
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
defer f.Close()
|
|
|
|
h, err := newHTPasswd(f)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return &accessController{realm: realm.(string), htpasswd: h}, nil
|
|
}
|
|
|
|
func (ac *accessController) Authorized(ctx context.Context, accessRecords ...auth.Access) (context.Context, error) {
|
|
req, err := context.GetRequest(ctx)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
username, password, ok := req.BasicAuth()
|
|
if !ok {
|
|
return nil, &challenge{
|
|
realm: ac.realm,
|
|
err: ErrInvalidCredential,
|
|
}
|
|
}
|
|
|
|
if err := ac.htpasswd.authenticateUser(username, password); err != nil {
|
|
context.GetLogger(ctx).Errorf("error authenticating user %q: %v", username, err)
|
|
return nil, &challenge{
|
|
realm: ac.realm,
|
|
err: ErrAuthenticationFailure,
|
|
}
|
|
}
|
|
|
|
return auth.WithUser(ctx, auth.UserInfo{Name: username}), nil
|
|
}
|
|
|
|
// challenge implements the auth.Challenge interface.
|
|
type challenge struct {
|
|
realm string
|
|
err error
|
|
}
|
|
|
|
var _ auth.Challenge = challenge{}
|
|
|
|
// SetHeaders sets the basic challenge header on the response.
|
|
func (ch challenge) SetHeaders(w http.ResponseWriter) {
|
|
w.Header().Set("WWW-Authenticate", fmt.Sprintf("Basic realm=%q", ch.realm))
|
|
}
|
|
|
|
func (ch challenge) Error() string {
|
|
return fmt.Sprintf("basic authentication challenge: %#v", ch)
|
|
}
|
|
|
|
func init() {
|
|
auth.Register("htpasswd", auth.InitFunc(newAccessController))
|
|
}
|