86 lines
2.9 KiB
Go
86 lines
2.9 KiB
Go
/*
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* Copyright (C) 2026 Fluxer Contributors
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*
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* This file is part of Fluxer.
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*
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* Fluxer is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Fluxer is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with Fluxer. If not, see <https://www.gnu.org/licenses/>.
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*/
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package integration
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import (
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"fmt"
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"net/http"
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"net/url"
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"strings"
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"testing"
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"time"
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)
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// TestOAuth2AuthorizationCodeReplayPrevention verifies that authorization codes
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// can only be used once. This is a critical security measure to prevent replay attacks
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// where an attacker intercepts an authorization code and attempts to use it multiple times,
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// as required by the OAuth 2.0 specification (RFC 6749).
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func TestOAuth2AuthorizationCodeReplayPrevention(t *testing.T) {
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client := newTestClient(t)
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appOwner := createTestAccount(t, client)
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endUser := createTestAccount(t, client)
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redirectURI := "https://example.com/callback"
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t.Run("application authorization code can only be used once with client secret", func(t *testing.T) {
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appID, _, _, clientSecret := createOAuth2Application(t, client, appOwner,
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fmt.Sprintf("App %d", time.Now().UnixNano()),
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[]string{redirectURI},
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[]string{"identify"},
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)
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authCode, _ := authorizeOAuth2(t, client, endUser.Token, appID, redirectURI, []string{"identify"}, "", "", "")
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token1 := exchangeOAuth2AuthorizationCode(t, client, appID, clientSecret, authCode, redirectURI, "")
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if token1.AccessToken == "" {
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t.Fatalf("first token exchange should succeed")
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}
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form := url.Values{
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"grant_type": {"authorization_code"},
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"code": {authCode},
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"redirect_uri": {redirectURI},
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"client_id": {appID},
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}
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req, err := http.NewRequest(http.MethodPost, fmt.Sprintf("%s/oauth2/token", client.baseURL), strings.NewReader(form.Encode()))
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if err != nil {
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t.Fatalf("failed to build second token request: %v", err)
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}
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req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
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req.SetBasicAuth(appID, clientSecret)
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client.applyCommonHeaders(req)
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resp, err := client.httpClient.Do(req)
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if err != nil {
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t.Fatalf("second token request failed: %v", err)
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}
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defer resp.Body.Close()
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if resp.StatusCode == http.StatusOK {
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t.Fatalf("authorization code should not be reusable - second exchange should fail")
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}
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if resp.StatusCode != http.StatusBadRequest && resp.StatusCode != http.StatusUnauthorized {
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t.Fatalf("expected 400 or 401 for code replay, got %d: %s", resp.StatusCode, readResponseBody(resp))
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}
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})
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}
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