mirror of
https://github.com/gravitational/teleport.git
synced 2026-10-31 02:56:01 +08:00
99 lines
2.6 KiB
Go
99 lines
2.6 KiB
Go
/*
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* Teleport
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* Copyright (C) 2023 Gravitational, Inc.
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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 <http://www.gnu.org/licenses/>.
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*/
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package githubactions
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import (
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"context"
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"encoding/json"
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"net/http"
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"net/url"
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"os"
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"github.com/gravitational/trace"
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)
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type tokenResponse struct {
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Value string `json:"value"`
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}
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// IDTokenSource allows a GitHub ID token to be fetched whilst executing
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// within the context of a GitHub actions workflow.
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type IDTokenSource struct {
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getIDTokenURL func() string
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getRequestToken func() string
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client http.Client
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}
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func NewIDTokenSource() *IDTokenSource {
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return &IDTokenSource{
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getIDTokenURL: func() string {
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return os.Getenv("ACTIONS_ID_TOKEN_REQUEST_URL")
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},
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getRequestToken: func() string {
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return os.Getenv("ACTIONS_ID_TOKEN_REQUEST_TOKEN")
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},
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}
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}
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// GetIDToken utilizes values set in the environment and the GitHub API to
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// fetch a GitHub issued IDToken.
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func (ip *IDTokenSource) GetIDToken(ctx context.Context) (string, error) {
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audience := "teleport.cluster.local"
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tokenURL := ip.getIDTokenURL()
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requestToken := ip.getRequestToken()
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if tokenURL == "" {
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return "", trace.BadParameter(
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"ACTIONS_ID_TOKEN_REQUEST_URL environment variable missing",
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)
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}
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if requestToken == "" {
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return "", trace.BadParameter(
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"ACTIONS_ID_TOKEN_REQUEST_TOKEN environment variable missing",
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)
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}
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tokenURL = tokenURL + "&audience=" + url.QueryEscape(audience)
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req, err := http.NewRequestWithContext(
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ctx, http.MethodGet, tokenURL, nil,
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)
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if err != nil {
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return "", trace.Wrap(err)
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}
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req.Header.Set("Authorization", "Bearer "+requestToken)
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req.Header.Set("Accept", "application/json; api-version=2.0")
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req.Header.Set("Content-Type", "application/json")
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res, err := ip.client.Do(req)
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if err != nil {
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return "", trace.Wrap(err)
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}
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defer res.Body.Close()
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var data tokenResponse
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if err := json.NewDecoder(res.Body).Decode(&data); err != nil {
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return "", trace.Wrap(err)
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}
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if data.Value == "" {
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return "", trace.BadParameter("response did not include ID token")
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}
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return data.Value, nil
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}
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