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@aeneasr @arekkas @michaelboke @antham
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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 oauth2
import (
"context"
"time"
"github.com/pkg/errors"
"github.com/ory/fosite"
)
type ClientCredentialsGrantHandler struct {
*HandleHelper
ScopeStrategy fosite.ScopeStrategy
AudienceMatchingStrategy fosite.AudienceMatchingStrategy
}
// IntrospectTokenEndpointRequest implements https://tools.ietf.org/html/rfc6749#section-4.4.2
func (c *ClientCredentialsGrantHandler) HandleTokenEndpointRequest(_ context.Context, request fosite.AccessRequester) error {
// grant_type REQUIRED.
// Value MUST be set to "client_credentials".
if !request.GetGrantTypes().Exact("client_credentials") {
return errors.WithStack(fosite.ErrUnknownRequest)
}
client := request.GetClient()
for _, scope := range request.GetRequestedScopes() {
if !c.ScopeStrategy(client.GetScopes(), scope) {
return errors.WithStack(fosite.ErrInvalidScope.WithHintf("The OAuth 2.0 Client is not allowed to request scope \"%s\".", scope))
}
}
if err := c.AudienceMatchingStrategy(client.GetAudience(), request.GetRequestedAudience()); err != nil {
return err
}
// The client MUST authenticate with the authorization server as described in Section 3.2.1.
// This requirement is already fulfilled because fosite requires all token requests to be authenticated as described
// in https://tools.ietf.org/html/rfc6749#section-3.2.1
if client.IsPublic() {
return errors.WithStack(fosite.ErrInvalidGrant.WithHint("The OAuth 2.0 Client is marked as public and is thus not allowed to use authorization grant \"client_credentials\"."))
}
// if the client is not public, he has already been authenticated by the access request handler.
request.GetSession().SetExpiresAt(fosite.AccessToken, time.Now().UTC().Add(c.AccessTokenLifespan))
return nil
}
// PopulateTokenEndpointResponse implements https://tools.ietf.org/html/rfc6749#section-4.4.3
func (c *ClientCredentialsGrantHandler) PopulateTokenEndpointResponse(ctx context.Context, request fosite.AccessRequester, response fosite.AccessResponder) error {
if !request.GetGrantTypes().Exact("client_credentials") {
return errors.WithStack(fosite.ErrUnknownRequest)
}
if !request.GetClient().GetGrantTypes().Has("client_credentials") {
return errors.WithStack(fosite.ErrInvalidGrant.WithHint("The OAuth 2.0 Client is not allowed to use authorization grant \"client_credentials\"."))
}
return c.IssueAccessToken(ctx, request, response)
}
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