179 lines
5.3 KiB
Go
179 lines
5.3 KiB
Go
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// +build ignore
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/*
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* Minio Cloud Storage, (C) 2018 Minio, Inc.
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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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*/
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package main
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import (
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"context"
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"crypto/rand"
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"encoding/base64"
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"encoding/json"
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"encoding/xml"
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"flag"
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"fmt"
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"log"
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"net/http"
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"net/url"
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"time"
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"golang.org/x/oauth2"
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googleOAuth2 "golang.org/x/oauth2/google"
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"github.com/minio/minio/pkg/auth"
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)
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// AssumedRoleUser - The identifiers for the temporary security credentials that
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// the operation returns. Please also see https://docs.aws.amazon.com/goto/WebAPI/sts-2011-06-15/AssumedRoleUser
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type AssumedRoleUser struct {
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Arn string
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AssumedRoleID string `xml:"AssumeRoleId"`
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// contains filtered or unexported fields
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}
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// AssumeRoleWithWebIdentityResponse contains the result of successful AssumeRoleWithWebIdentity request.
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type AssumeRoleWithWebIdentityResponse struct {
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XMLName xml.Name `xml:"https://sts.amazonaws.com/doc/2011-06-15/ AssumeRoleWithWebIdentityResponse" json:"-"`
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Result WebIdentityResult `xml:"AssumeRoleWithWebIdentityResult"`
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ResponseMetadata struct {
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RequestID string `xml:"RequestId,omitempty"`
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} `xml:"ResponseMetadata,omitempty"`
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}
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// WebIdentityResult - Contains the response to a successful AssumeRoleWithWebIdentity
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// request, including temporary credentials that can be used to make Minio API requests.
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type WebIdentityResult struct {
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AssumedRoleUser AssumedRoleUser `xml:",omitempty"`
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Audience string `xml:",omitempty"`
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Credentials auth.Credentials `xml:",omitempty"`
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PackedPolicySize int `xml:",omitempty"`
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Provider string `xml:",omitempty"`
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SubjectFromWebIdentityToken string `xml:",omitempty"`
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}
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// Returns a base64 encoded random 32 byte string.
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func randomState() string {
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b := make([]byte, 32)
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rand.Read(b)
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return base64.RawURLEncoding.EncodeToString(b)
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}
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var (
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stsEndpoint string
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authEndpoint string
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tokenEndpoint string
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clientID string
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clientSecret string
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)
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func init() {
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flag.StringVar(&stsEndpoint, "sts-ep", "http://localhost:9000", "STS endpoint")
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flag.StringVar(&authEndpoint, "auth-ep", googleOAuth2.Endpoint.AuthURL, "Auth endpoint")
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flag.StringVar(&tokenEndpoint, "token-ep", googleOAuth2.Endpoint.TokenURL, "Token endpoint")
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flag.StringVar(&clientID, "cid", "", "Client ID")
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flag.StringVar(&clientSecret, "csec", "", "Client secret")
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}
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func main() {
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flag.Parse()
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if clientID == "" || clientSecret == "" {
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flag.PrintDefaults()
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return
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}
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ctx := context.Background()
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config := oauth2.Config{
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ClientID: clientID,
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ClientSecret: clientSecret,
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Endpoint: oauth2.Endpoint{
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AuthURL: authEndpoint,
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TokenURL: tokenEndpoint,
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},
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RedirectURL: "http://localhost:8080/oauth2/callback",
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Scopes: []string{"openid", "profile", "email"},
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}
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state := randomState()
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http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
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http.Redirect(w, r, config.AuthCodeURL(state), http.StatusFound)
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})
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http.HandleFunc("/oauth2/callback", func(w http.ResponseWriter, r *http.Request) {
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if r.URL.Query().Get("state") != state {
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http.Error(w, "state did not match", http.StatusBadRequest)
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return
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}
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oauth2Token, err := config.Exchange(ctx, r.URL.Query().Get("code"))
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if err != nil {
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http.Error(w, "Failed to exchange token: "+err.Error(), http.StatusInternalServerError)
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return
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}
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if oauth2Token.Valid() {
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v := url.Values{}
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v.Set("Action", "AssumeRoleWithWebIdentity")
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v.Set("WebIdentityToken", fmt.Sprintf("%s", oauth2Token.Extra("id_token")))
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v.Set("DurationSeconds", fmt.Sprintf("%d", int64(oauth2Token.Expiry.Sub(time.Now().UTC()).Seconds())))
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v.Set("Version", "2011-06-15")
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u, err := url.Parse("http://localhost:9000")
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if err != nil {
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http.Error(w, err.Error(), http.StatusInternalServerError)
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return
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}
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u.RawQuery = v.Encode()
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req, err := http.NewRequest("POST", u.String(), nil)
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if err != nil {
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http.Error(w, err.Error(), http.StatusInternalServerError)
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return
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}
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resp, err := http.DefaultClient.Do(req)
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if err != nil {
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http.Error(w, err.Error(), http.StatusInternalServerError)
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return
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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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http.Error(w, resp.Status, resp.StatusCode)
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return
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}
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a := AssumeRoleWithWebIdentityResponse{}
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if err = xml.NewDecoder(resp.Body).Decode(&a); err != nil {
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http.Error(w, err.Error(), http.StatusInternalServerError)
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return
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}
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w.Write([]byte("##### Credentials\n"))
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c, err := json.MarshalIndent(a.Result.Credentials, "", "\t")
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if err != nil {
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http.Error(w, err.Error(), http.StatusInternalServerError)
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return
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}
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w.Write(c)
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}
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})
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log.Printf("listening on http://%s/", "localhost:8080")
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log.Fatal(http.ListenAndServe("localhost:8080", nil))
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}
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