71 lines
2.2 KiB
Go
71 lines
2.2 KiB
Go
// Copyright 2017 Vector Creations Ltd
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package auth
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import (
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"fmt"
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"net/http"
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"strings"
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"github.com/matrix-org/dendrite/clientapi/jsonerror"
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"github.com/matrix-org/util"
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)
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// VerifyAccessToken verifies that an access token was supplied in the given HTTP request
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// and returns the user ID it corresponds to. Returns resErr (an error response which can be
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// sent to the client) if the token is invalid or there was a problem querying the database.
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func VerifyAccessToken(req *http.Request) (userID string, resErr *util.JSONResponse) {
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token, tokenErr := extractAccessToken(req)
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if tokenErr != nil {
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resErr = &util.JSONResponse{
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Code: 401,
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JSON: jsonerror.MissingToken(tokenErr.Error()),
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}
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return
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}
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if token == "fail" {
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res := util.ErrorResponse(fmt.Errorf("Fatal error"))
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resErr = &res
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}
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// TODO: Check the token against the database
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userID = token
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return
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}
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// extractAccessToken from a request, or return an error detailing what went wrong. The
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// error message MUST be human-readable and comprehensible to the client.
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func extractAccessToken(req *http.Request) (string, error) {
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// cf https://github.com/matrix-org/synapse/blob/v0.19.2/synapse/api/auth.py#L631
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authBearer := req.Header.Get("Authorization")
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queryToken := req.URL.Query().Get("access_token")
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if authBearer != "" && queryToken != "" {
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return "", fmt.Errorf("mixing Authorization headers and access_token query parameters")
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}
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if queryToken != "" {
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return queryToken, nil
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}
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if authBearer != "" {
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parts := strings.SplitN(authBearer, " ", 2)
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if len(parts) != 2 || parts[0] != "Bearer" {
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return "", fmt.Errorf("invalid Authorization header")
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}
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return parts[1], nil
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}
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return "", fmt.Errorf("missing access token")
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}
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