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https://github.com/golang/oauth2.git
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95bec95381
go/programmable-auth-design for context. Adds support for user defined supplier methods to return subject tokens and AWS security credentials. Change-Id: I7bc41f8c5202ae933fce516632f5049bbeb3d378 GitHub-Last-Rev: ac519b242f8315df572f1b205b0670f139bfc6c3 GitHub-Pull-Request: golang/oauth2#690 Reviewed-on: https://go-review.googlesource.com/c/oauth2/+/550835 LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com> Reviewed-by: Leo Siracusa <leosiracusa@google.com> Reviewed-by: Chris Smith <chrisdsmith@google.com> TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Cody Oss <codyoss@google.com>
80 lines
2.2 KiB
Go
80 lines
2.2 KiB
Go
// Copyright 2020 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package externalaccount
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import (
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"context"
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"encoding/json"
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"errors"
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"fmt"
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"io"
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"io/ioutil"
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"net/http"
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"golang.org/x/oauth2"
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)
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type urlCredentialSource struct {
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URL string
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Headers map[string]string
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Format Format
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ctx context.Context
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}
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func (cs urlCredentialSource) credentialSourceType() string {
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return "url"
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}
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func (cs urlCredentialSource) subjectToken() (string, error) {
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client := oauth2.NewClient(cs.ctx, nil)
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req, err := http.NewRequest("GET", cs.URL, nil)
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if err != nil {
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return "", fmt.Errorf("oauth2/google/externalaccount: HTTP request for URL-sourced credential failed: %v", err)
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}
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req = req.WithContext(cs.ctx)
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for key, val := range cs.Headers {
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req.Header.Add(key, val)
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}
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resp, err := client.Do(req)
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if err != nil {
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return "", fmt.Errorf("oauth2/google/externalaccount: invalid response when retrieving subject token: %v", err)
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}
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defer resp.Body.Close()
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respBody, err := ioutil.ReadAll(io.LimitReader(resp.Body, 1<<20))
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if err != nil {
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return "", fmt.Errorf("oauth2/google/externalaccount: invalid body in subject token URL query: %v", err)
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}
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if c := resp.StatusCode; c < 200 || c > 299 {
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return "", fmt.Errorf("oauth2/google/externalaccount: status code %d: %s", c, respBody)
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}
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switch cs.Format.Type {
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case "json":
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jsonData := make(map[string]interface{})
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err = json.Unmarshal(respBody, &jsonData)
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if err != nil {
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return "", fmt.Errorf("oauth2/google/externalaccount: failed to unmarshal subject token file: %v", err)
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}
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val, ok := jsonData[cs.Format.SubjectTokenFieldName]
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if !ok {
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return "", errors.New("oauth2/google/externalaccount: provided subject_token_field_name not found in credentials")
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}
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token, ok := val.(string)
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if !ok {
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return "", errors.New("oauth2/google/externalaccount: improperly formatted subject token")
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}
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return token, nil
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case "text":
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return string(respBody), nil
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case "":
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return string(respBody), nil
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default:
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return "", errors.New("oauth2/google/externalaccount: invalid credential_source file format type")
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}
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}
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