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/*
* Copyright © 2015-2018 Aeneas Rekkas <[email protected]>
*
* 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 <[email protected]>
* @copyright 2015-2018 Aeneas Rekkas <[email protected]>
* @license Apache-2.0
*
*/
package fosite
import (
"context"
"net/http"
"strings"
"github.com/pkg/errors"
)
type TokenIntrospector interface {
IntrospectToken(ctx context.Context, token string, tokenType TokenType, accessRequest AccessRequester, scopes []string) (TokenType, error)
}
func AccessTokenFromRequest(req *http.Request) string {
// According to https://tools.ietf.org/html/rfc6750 you can pass tokens through:
// - Form-Encoded Body Parameter. Recommended, more likely to appear. e.g.: Authorization: Bearer mytoken123
// - URI Query Parameter e.g. access_token=mytoken123
auth := req.Header.Get("Authorization")
split := strings.SplitN(auth, " ", 2)
if len(split) != 2 || !strings.EqualFold(split[0], "bearer") {
// Nothing in Authorization header, try access_token
// Empty string returned if there's no such parameter
if err := req.ParseMultipartForm(1 << 20); err != nil && err != http.ErrNotMultipart {
return ""
}
return req.Form.Get("access_token")
}
return split[1]
}
func (f *Fosite) IntrospectToken(ctx context.Context, token string, tokenType TokenType, session Session, scopes ...string) (TokenType, AccessRequester, error) {
var found bool = false
var foundTokenType TokenType = ""
ar := NewAccessRequest(session)
for _, validator := range f.TokenIntrospectionHandlers {
tt, err := validator.IntrospectToken(ctx, token, tokenType, ar, scopes)
if err := errors.Cause(err); err == nil {
found = true
foundTokenType = tt
} else if err.Error() == ErrUnknownRequest.Error() {
// Nothing to do
} else if err != nil {
rfcerr := ErrorToRFC6749Error(err)
return "", nil, errors.WithStack(rfcerr)
}
}
if !found {
return "", nil, errors.WithStack(ErrRequestUnauthorized.WithHint("Unable to find a suitable validation strategy for the token, thus it is invalid."))
}
return foundTokenType, ar, nil
}
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