package lastfm
import (
"bytes"
"encoding/json"
"io"
"net/http"
"net/http/httptest"
"time"
"github.com/navidrome/navidrome/core/agents"
"github.com/navidrome/navidrome/core/auth"
"github.com/navidrome/navidrome/model"
"github.com/navidrome/navidrome/model/request"
"github.com/navidrome/navidrome/tests"
. "github.com/onsi/ginkgo/v2"
. "github.com/onsi/gomega"
)
var _ = Describe("auth_router", func() {
var (
ds *tests.MockDataStore
userProps *tests.MockedUserPropsRepo
httpClient *tests.FakeHttpClient
router *Router
)
const (
victimID = "victim-user-id"
attackerID = "attacker-user-id"
)
BeforeEach(func() {
userProps = &tests.MockedUserPropsRepo{}
ds = &tests.MockDataStore{
MockedProperty: &tests.MockedPropertyRepo{},
MockedUserProps: userProps,
}
auth.Init(ds)
httpClient = &tests.FakeHttpClient{}
router = &Router{
ds: ds,
apiKey: "API_KEY",
secret: "SECRET",
sessionKeys: &agents.SessionKeys{DataStore: ds, KeyName: sessionKeyProperty},
}
router.client = newClient(router.apiKey, router.secret, httpClient)
router.Handler = router.routes()
})
storedSessionKey := func(userID string) string {
key, _ := userProps.Get(userID, sessionKeyProperty)
return key
}
stubGetSessionOK := func(sessionKey string) {
httpClient.Res = http.Response{
Body: io.NopCloser(bytes.NewBufferString(`{"session":{"name":"Navidrome","key":"` + sessionKey + `","subscriber":0}}`)),
StatusCode: 200,
}
}
Describe("getLinkStatus", func() {
It("includes a signed linkToken for the authenticated user", func() {
req := httptest.NewRequest(http.MethodGet, "/link", nil)
ctx := request.WithUser(req.Context(), model.User{ID: victimID})
req = req.WithContext(ctx)
rec := httptest.NewRecorder()
router.getLinkStatus(rec, req)
Expect(rec.Code).To(Equal(http.StatusOK))
var body map[string]any
Expect(json.Unmarshal(rec.Body.Bytes(), &body)).To(Succeed())
Expect(body["apiKey"]).To(Equal("API_KEY"))
Expect(body["status"]).To(Equal(false))
token, ok := body["linkToken"].(string)
Expect(ok).To(BeTrue())
Expect(token).ToNot(BeEmpty())
verified, err := verifyLinkToken(token)
Expect(err).ToNot(HaveOccurred())
Expect(verified).To(Equal(victimID))
})
})
Describe("callback", func() {
It("stores the session key under the user encoded in the signed token", func() {
stubGetSessionOK("LEGIT_SESSION")
linkToken, err := createLinkToken(victimID)
Expect(err).ToNot(HaveOccurred())
req := httptest.NewRequest(http.MethodGet, "/link/callback?uid="+linkToken+"&token=LASTFM_TOKEN", nil)
rec := httptest.NewRecorder()
router.callback(rec, req)
Expect(rec.Code).To(Equal(http.StatusOK))
Expect(storedSessionKey(victimID)).To(Equal("LEGIT_SESSION"))
})
It("rejects a raw (unsigned) uid value", func() {
req := httptest.NewRequest(http.MethodGet, "/link/callback?uid="+victimID+"&token=LASTFM_TOKEN", nil)
rec := httptest.NewRecorder()
router.callback(rec, req)
Expect(rec.Code).To(Equal(http.StatusBadRequest))
Expect(storedSessionKey(victimID)).To(BeEmpty())
Expect(httpClient.SavedRequest).To(BeNil())
})
It("rejects an expired link token", func() {
expiredToken, err := auth.EncodeToken(map[string]any{
"uid": victimID,
"scope": linkTokenScope,
"exp": time.Now().Add(-1 * time.Minute).UTC().Unix(),
})
Expect(err).ToNot(HaveOccurred())
req := httptest.NewRequest(http.MethodGet, "/link/callback?uid="+expiredToken+"&token=LASTFM_TOKEN", nil)
rec := httptest.NewRecorder()
router.callback(rec, req)
Expect(rec.Code).To(Equal(http.StatusBadRequest))
Expect(storedSessionKey(victimID)).To(BeEmpty())
Expect(httpClient.SavedRequest).To(BeNil())
})
It("rejects a token with the wrong scope (e.g. a regular session JWT)", func() {
sessionJWT, err := auth.CreateToken(&model.User{ID: attackerID, UserName: "attacker"})
Expect(err).ToNot(HaveOccurred())
req := httptest.NewRequest(http.MethodGet, "/link/callback?uid="+sessionJWT+"&token=LASTFM_TOKEN", nil)
rec := httptest.NewRecorder()
router.callback(rec, req)
Expect(rec.Code).To(Equal(http.StatusBadRequest))
Expect(storedSessionKey(attackerID)).To(BeEmpty())
Expect(httpClient.SavedRequest).To(BeNil())
})
It("writes only under the user encoded in the token, regardless of query manipulation", func() {
stubGetSessionOK("ATTACKER_SESSION")
attackerToken, err := createLinkToken(attackerID)
Expect(err).ToNot(HaveOccurred())
req := httptest.NewRequest(http.MethodGet, "/link/callback?uid="+attackerToken+"&token=LASTFM_TOKEN&user="+victimID, nil)
rec := httptest.NewRecorder()
router.callback(rec, req)
Expect(rec.Code).To(Equal(http.StatusOK))
Expect(storedSessionKey(attackerID)).To(Equal("ATTACKER_SESSION"))
Expect(storedSessionKey(victimID)).To(BeEmpty())
})
It("returns 400 when uid is missing", func() {
req := httptest.NewRequest(http.MethodGet, "/link/callback?token=LASTFM_TOKEN", nil)
rec := httptest.NewRecorder()
router.callback(rec, req)
Expect(rec.Code).To(Equal(http.StatusBadRequest))
})
It("returns 400 when token is missing", func() {
linkToken, err := createLinkToken(victimID)
Expect(err).ToNot(HaveOccurred())
req := httptest.NewRequest(http.MethodGet, "/link/callback?uid="+linkToken, nil)
rec := httptest.NewRecorder()
router.callback(rec, req)
Expect(rec.Code).To(Equal(http.StatusBadRequest))
})
})
Describe("link token helpers", func() {
It("round-trips a freshly issued token", func() {
token, err := createLinkToken(victimID)
Expect(err).ToNot(HaveOccurred())
uid, err := verifyLinkToken(token)
Expect(err).ToNot(HaveOccurred())
Expect(uid).To(Equal(victimID))
})
It("rejects garbage", func() {
_, err := verifyLinkToken("not-a-jwt")
Expect(err).To(HaveOccurred())
})
It("rejects a token whose scope claim is wrong", func() {
wrongScopeToken, err := auth.EncodeToken(map[string]any{
"uid": victimID,
"scope": "some-other-scope",
"exp": time.Now().Add(linkTokenTTL).UTC().Unix(),
})
Expect(err).ToNot(HaveOccurred())
_, err = verifyLinkToken(wrongScopeToken)
Expect(err).To(MatchError("invalid link token scope"))
})
It("rejects a scoped token that has no expiration", func() {
nonExpiringToken, err := auth.EncodeToken(map[string]any{
"uid": victimID,
"scope": linkTokenScope,
})
Expect(err).ToNot(HaveOccurred())
_, err = verifyLinkToken(nonExpiringToken)
Expect(err).To(MatchError("link token missing expiration"))
})
})
})
