100 lines
3.2 KiB
Go
100 lines
3.2 KiB
Go
// Vikunja is a to-do list application to facilitate your life.
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// Copyright 2018-present Vikunja and contributors. All rights reserved.
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//
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// This program 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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// This program 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 this program. If not, see <https://www.gnu.org/licenses/>.
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package feeds
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import (
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"strings"
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"code.vikunja.io/api/pkg/db"
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"code.vikunja.io/api/pkg/log"
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"code.vikunja.io/api/pkg/models"
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"code.vikunja.io/api/pkg/user"
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"github.com/labstack/echo/v5"
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"xorm.io/xorm"
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)
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func checkAPIToken(s *xorm.Session, username, token string) (*user.User, error) {
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apiToken, u, err := models.ValidateTokenAndGetOwner(s, token)
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if err != nil {
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return nil, err
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}
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if apiToken == nil || u == nil {
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return nil, nil
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}
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if !apiToken.HasFeedsAccess() {
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log.Debugf("[feeds auth] API token %d does not have feeds access permission", apiToken.ID)
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return nil, nil
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}
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if u.Username != username {
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log.Debugf("[feeds auth] API token %d owner %s does not match provided username %s", apiToken.ID, u.Username, username)
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return nil, nil
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}
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return u, nil
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}
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// AuthenticateFeedToken validates feed credentials against an existing session.
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// Only API tokens are accepted — password and LDAP credentials are rejected
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// outright because feed URLs are commonly exported, shared, or cached by feed
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// readers. It returns the authenticated user, or nil for any rejection so
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// callers can treat "invalid" and "unknown" identically.
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func AuthenticateFeedToken(s *xorm.Session, username, password string) (*user.User, error) {
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if !strings.HasPrefix(password, models.APITokenPrefix) {
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return nil, nil
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}
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// GetTokenFromTokenString slices password[len-8:] without a length check,
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// so a stray "tk_" or other short prefix-only string would panic before
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// the credentials could be rejected. Real tokens are far longer than
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// prefix+8, so anything shorter is invalid by construction.
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if len(password) < len(models.APITokenPrefix)+8 {
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return nil, nil
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}
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u, err := checkAPIToken(s, username, password)
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if err != nil {
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log.Errorf("Error during API token auth for feeds: %v", err)
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return nil, nil
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}
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if u == nil {
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return nil, nil
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}
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if u.IsBot() {
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log.Warningf("Feed auth rejected for bot user %d", u.ID)
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return nil, nil
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}
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return u, nil
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}
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// BasicAuth authenticates feed requests for echo's BasicAuth middleware. The
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// validation logic is shared with the v2 handler via AuthenticateFeedToken.
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func BasicAuth(c *echo.Context, username, password string) (bool, error) {
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s := db.NewSession()
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defer s.Close()
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u, err := AuthenticateFeedToken(s, username, password)
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if err != nil || u == nil {
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return false, err
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}
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c.Set("userBasicAuth", u)
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return true, nil
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}
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