sdk/go/arvadostest/oidc_provider.go

   1 // Copyright (C) The Arvados Authors. All rights reserved.
   2 //
   3 // SPDX-License-Identifier: Apache-2.0
   4
   5 package arvadostest
   6
   7 import (
   8         "crypto/rand"
   9         "crypto/rsa"
  10         "encoding/base64"
  11         "encoding/json"
  12         "net/http"
  13         "net/http/httptest"
  14         "net/url"
  15         "strings"
  16         "time"
  17
  18         "gopkg.in/check.v1"
  19         "gopkg.in/square/go-jose.v2"
  20         "gopkg.in/square/go-jose.v2/jwt"
  21 )
  22
  23 type OIDCProvider struct {
  24         // expected token request
  25         ValidCode         string
  26         ValidClientID     string
  27         ValidClientSecret string
  28         // desired response from token endpoint
  29         AuthEmail          string
  30         AuthEmailVerified  bool
  31         AuthName           string
  32         AccessTokenPayload map[string]interface{}
  33
  34         PeopleAPIResponse map[string]interface{}
  35
  36         key       *rsa.PrivateKey
  37         Issuer    *httptest.Server
  38         PeopleAPI *httptest.Server
  39         c         *check.C
  40 }
  41
  42 func NewOIDCProvider(c *check.C) *OIDCProvider {
  43         p := &OIDCProvider{c: c}
  44         var err error
  45         p.key, err = rsa.GenerateKey(rand.Reader, 2048)
  46         c.Assert(err, check.IsNil)
  47         p.Issuer = httptest.NewServer(http.HandlerFunc(p.serveOIDC))
  48         p.PeopleAPI = httptest.NewServer(http.HandlerFunc(p.servePeopleAPI))
  49         p.AccessTokenPayload = map[string]interface{}{"sub": "example"}
  50         return p
  51 }
  52
  53 func (p *OIDCProvider) ValidAccessToken() string {
  54         buf, _ := json.Marshal(p.AccessTokenPayload)
  55         return p.fakeToken(buf)
  56 }
  57
  58 func (p *OIDCProvider) serveOIDC(w http.ResponseWriter, req *http.Request) {
  59         req.ParseForm()
  60         p.c.Logf("serveOIDC: got req: %s %s %s", req.Method, req.URL, req.Form)
  61         w.Header().Set("Content-Type", "application/json")
  62         switch req.URL.Path {
  63         case "/.well-known/openid-configuration":
  64                 json.NewEncoder(w).Encode(map[string]interface{}{
  65                         "issuer":                 p.Issuer.URL,
  66                         "authorization_endpoint": p.Issuer.URL + "/auth",
  67                         "token_endpoint":         p.Issuer.URL + "/token",
  68                         "jwks_uri":               p.Issuer.URL + "/jwks",
  69                         "userinfo_endpoint":      p.Issuer.URL + "/userinfo",
  70                 })
  71         case "/token":
  72                 var clientID, clientSecret string
  73                 auth, _ := base64.StdEncoding.DecodeString(strings.TrimPrefix(req.Header.Get("Authorization"), "Basic "))
  74                 authsplit := strings.Split(string(auth), ":")
  75                 if len(authsplit) == 2 {
  76                         clientID, _ = url.QueryUnescape(authsplit[0])
  77                         clientSecret, _ = url.QueryUnescape(authsplit[1])
  78                 }
  79                 if clientID != p.ValidClientID || clientSecret != p.ValidClientSecret {
  80                         p.c.Logf("OIDCProvider: expected (%q, %q) got (%q, %q)", p.ValidClientID, p.ValidClientSecret, clientID, clientSecret)
  81                         w.WriteHeader(http.StatusUnauthorized)
  82                         return
  83                 }
  84
  85                 if req.Form.Get("code") != p.ValidCode || p.ValidCode == "" {
  86                         w.WriteHeader(http.StatusUnauthorized)
  87                         return
  88                 }
  89                 idToken, _ := json.Marshal(map[string]interface{}{
  90                         "iss":            p.Issuer.URL,
  91                         "aud":            []string{clientID},
  92                         "sub":            "fake-user-id",
  93                         "exp":            time.Now().UTC().Add(time.Minute).Unix(),
  94                         "iat":            time.Now().UTC().Unix(),
  95                         "nonce":          "fake-nonce",
  96                         "email":          p.AuthEmail,
  97                         "email_verified": p.AuthEmailVerified,
  98                         "name":           p.AuthName,
  99                         "alt_verified":   true,                    // for custom claim tests
 100                         "alt_email":      "alt_email@example.com", // for custom claim tests
 101                         "alt_username":   "desired-username",      // for custom claim tests
 102                 })
 103                 json.NewEncoder(w).Encode(struct {
 104                         AccessToken  string `json:"access_token"`
 105                         TokenType    string `json:"token_type"`
 106                         RefreshToken string `json:"refresh_token"`
 107                         ExpiresIn    int32  `json:"expires_in"`
 108                         IDToken      string `json:"id_token"`
 109                 }{
 110                         AccessToken:  p.ValidAccessToken(),
 111                         TokenType:    "Bearer",
 112                         RefreshToken: "test-refresh-token",
 113                         ExpiresIn:    30,
 114                         IDToken:      p.fakeToken(idToken),
 115                 })
 116         case "/jwks":
 117                 json.NewEncoder(w).Encode(jose.JSONWebKeySet{
 118                         Keys: []jose.JSONWebKey{
 119                                 {Key: p.key.Public(), Algorithm: string(jose.RS256), KeyID: ""},
 120                         },
 121                 })
 122         case "/auth":
 123                 w.WriteHeader(http.StatusInternalServerError)
 124         case "/userinfo":
 125                 authhdr := req.Header.Get("Authorization")
 126                 if _, err := jwt.ParseSigned(strings.TrimPrefix(authhdr, "Bearer ")); err != nil {
 127                         p.c.Logf("OIDCProvider: bad auth %q", authhdr)
 128                         w.WriteHeader(http.StatusUnauthorized)
 129                         return
 130                 }
 131                 json.NewEncoder(w).Encode(map[string]interface{}{
 132                         "sub":            "fake-user-id",
 133                         "name":           p.AuthName,
 134                         "given_name":     p.AuthName,
 135                         "family_name":    "",
 136                         "alt_username":   "desired-username",
 137                         "email":          p.AuthEmail,
 138                         "email_verified": p.AuthEmailVerified,
 139                 })
 140         default:
 141                 w.WriteHeader(http.StatusNotFound)
 142         }
 143 }
 144
 145 func (p *OIDCProvider) servePeopleAPI(w http.ResponseWriter, req *http.Request) {
 146         req.ParseForm()
 147         p.c.Logf("servePeopleAPI: got req: %s %s %s", req.Method, req.URL, req.Form)
 148         w.Header().Set("Content-Type", "application/json")
 149         switch req.URL.Path {
 150         case "/v1/people/me":
 151                 if f := req.Form.Get("personFields"); f != "emailAddresses,names" {
 152                         w.WriteHeader(http.StatusBadRequest)
 153                         break
 154                 }
 155                 json.NewEncoder(w).Encode(p.PeopleAPIResponse)
 156         default:
 157                 w.WriteHeader(http.StatusNotFound)
 158         }
 159 }
 160
 161 func (p *OIDCProvider) fakeToken(payload []byte) string {
 162         signer, err := jose.NewSigner(jose.SigningKey{Algorithm: jose.RS256, Key: p.key}, nil)
 163         if err != nil {
 164                 p.c.Error(err)
 165                 return ""
 166         }
 167         object, err := signer.Sign(payload)
 168         if err != nil {
 169                 p.c.Error(err)
 170                 return ""
 171         }
 172         t, err := object.CompactSerialize()
 173         if err != nil {
 174                 p.c.Error(err)
 175                 return ""
 176         }
 177         p.c.Logf("fakeToken(%q) == %q", payload, t)
 178         return t
 179 }