/
oauth2_client_credentials.go
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/
oauth2_client_credentials.go
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/*
* Copyright © 2015-2018 Aeneas Rekkas <aeneas+oss@aeneas.io>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* @author Aeneas Rekkas <aeneas+oss@aeneas.io>
* @Copyright 2015-2018 Aeneas Rekkas <aeneas+oss@aeneas.io>
* @license Apache-2.0
*
*/
package authentication
import (
"context"
"encoding/json"
"net/http"
"github.com/pkg/errors"
"golang.org/x/oauth2/clientcredentials"
)
// swagger:model authenticationOAuth2ClientCredentialsSession
type OAuth2ClientCredentialsSession struct {
// Here, it's subject
*DefaultSession
}
type OAuth2ClientCredentialsAuthentication struct {
tokenURL string
}
// swagger:model AuthenticationOAuth2ClientCredentialsRequest
type AuthenticationOAuth2ClientCredentialsRequest struct {
// Token is the token to introspect.
ClientID string `json:"id"`
ClientSecret string `json:"secret"`
// Scope is an array of scopes that are required.
Scopes []string `json:"scope"`
}
func NewOAuth2ClientCredentialsSession() *OAuth2ClientCredentialsSession {
return &OAuth2ClientCredentialsSession{
DefaultSession: new(DefaultSession),
}
}
func NewOAuth2ClientCredentialsAuthentication(tokenURL string) *OAuth2ClientCredentialsAuthentication {
return &OAuth2ClientCredentialsAuthentication{
tokenURL: tokenURL,
}
}
func (a *OAuth2ClientCredentialsAuthentication) Authenticate(r *http.Request) (Session, error) {
var auth AuthenticationOAuth2ClientCredentialsRequest
if err := json.NewDecoder(r.Body).Decode(&auth); err != nil {
return nil, errors.WithStack(err)
}
c := &clientcredentials.Config{
TokenURL: a.tokenURL,
ClientID: auth.ClientID,
ClientSecret: auth.ClientSecret,
Scopes: auth.Scopes,
}
token, err := c.Token(context.Background())
if err != nil {
return nil, errors.WithStack(ErrUnauthorized)
} else if token.AccessToken == "" {
return nil, errors.WithStack(ErrUnauthorized)
}
return &OAuth2ClientCredentialsSession{
DefaultSession: &DefaultSession{
Subject: auth.ClientID,
},
}, nil
}