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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 fosite
import (
"context"
"encoding/json"
"fmt"
"net/http"
"github.com/pkg/errors"
)
// NewRevocationRequest handles incoming token revocation requests and
// validates various parameters as specified in:
// https://tools.ietf.org/html/rfc7009#section-2.1
//
// The authorization server first validates the client credentials (in
// case of a confidential client) and then verifies whether the token
// was issued to the client making the revocation request. If this
// validation fails, the request is refused and the client is informed
// of the error by the authorization server as described below.
//
// In the next step, the authorization server invalidates the token.
// The invalidation takes place immediately, and the token cannot be
// used again after the revocation.
//
// * https://tools.ietf.org/html/rfc7009#section-2.2
// An invalid token type hint value is ignored by the authorization
// server and does not influence the revocation response.
func (f *Fosite) NewRevocationRequest(ctx context.Context, r *http.Request) error {
if r.Method != "POST" {
return errors.WithStack(ErrInvalidRequest.WithHintf("HTTP method is \"%s\", expected \"POST\".", r.Method))
} else if err := r.ParseMultipartForm(1 << 20); err != nil && err != http.ErrNotMultipart {
return errors.WithStack(ErrInvalidRequest.WithHint("Unable to parse HTTP body, make sure to send a properly formatted form request body.").WithDebug(err.Error()))
} else if len(r.PostForm) == 0 {
return errors.WithStack(ErrInvalidRequest.WithHint("The POST body can not be empty."))
}
client, err := f.AuthenticateClient(ctx, r, r.PostForm)
if err != nil {
return err
}
token := r.PostForm.Get("token")
tokenTypeHint := TokenType(r.PostForm.Get("token_type_hint"))
var found bool
for _, loader := range f.RevocationHandlers {
if err := loader.RevokeToken(ctx, token, tokenTypeHint, client); err == nil {
found = true
} else if errors.Cause(err).Error() == ErrUnknownRequest.Error() {
// do nothing
} else if err != nil {
return err
}
}
if !found {
return errors.WithStack(ErrInvalidRequest)
}
return nil
}
// WriteRevocationResponse writes a token revocation response as specified in:
// https://tools.ietf.org/html/rfc7009#section-2.2
//
// The authorization server responds with HTTP status code 200 if the
// token has been revoked successfully or if the client submitted an
// invalid token.
//
// Note: invalid tokens do not cause an error response since the client
// cannot handle such an error in a reasonable way. Moreover, the
// purpose of the revocation request, invalidating the particular token,
// is already achieved.
func (f *Fosite) WriteRevocationResponse(rw http.ResponseWriter, err error) {
if err == nil {
rw.WriteHeader(http.StatusOK)
return
}
switch errors.Cause(err).Error() {
case ErrInvalidRequest.Error():
fallthrough
case ErrInvalidClient.Error():
rw.Header().Set("Content-Type", "application/json;charset=UTF-8")
js, err := json.Marshal(ErrInvalidClient)
if err != nil {
http.Error(rw, fmt.Sprintf(`{"error": "%s"}`, err.Error()), http.StatusInternalServerError)
return
}
rw.WriteHeader(ErrInvalidClient.Code)
rw.Write(js)
default:
// 200 OK
rw.WriteHeader(http.StatusOK)
}
}
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