fix auth completion and payment resume hardening

backend/internal/handler/auth_oauth_pending_flow.go

@@ -1350,10 +1350,24 @@ func (h *AuthHandler) ExchangePendingOAuthCompletion(c *gin.Context) {
 		return
 	}
 	if !adoptionDecision.hasDecision() {
-		response.Success(c, payload)
-		return
+		adoptionRequired, _ := payload["adoption_required"].(bool)
+		if adoptionRequired {
+			response.Success(c, payload)
+			return
+		}
 	}
-	decision, err := h.upsertPendingOAuthAdoptionDecision(c, session.ID, adoptionDecision)
+
+	decisionReq := adoptionDecision
+	if !decisionReq.hasDecision() {
+		adoptDisplayName := false
+		adoptAvatar := false
+		decisionReq = oauthAdoptionDecisionRequest{
+			AdoptDisplayName: &adoptDisplayName,
+			AdoptAvatar:      &adoptAvatar,
+		}
+	}
+
+	decision, err := h.ensurePendingOAuthAdoptionDecision(c, session.ID, decisionReq)
 	if err != nil {
 		response.ErrorFrom(c, err)
 		return

backend/internal/handler/auth_oauth_pending_flow_test.go

@@ -523,6 +523,68 @@ func TestExchangePendingOAuthCompletionLoginFalseFalseBindsIdentityWithoutAdopti
 	require.NotNil(t, storedSession.ConsumedAt)
 }
 
+func TestExchangePendingOAuthCompletionLoginWithoutDecisionStillBindsIdentity(t *testing.T) {
+	handler, client := newOAuthPendingFlowTestHandler(t, false)
+	ctx := context.Background()
+
+	userEntity, err := client.User.Create().
+		SetEmail("login-nodecision@example.com").
+		SetUsername("legacy-name").
+		SetPasswordHash("hash").
+		SetRole(service.RoleUser).
+		SetStatus(service.StatusActive).
+		Save(ctx)
+	require.NoError(t, err)
+
+	session, err := client.PendingAuthSession.Create().
+		SetSessionToken("login-nodecision-session-token").
+		SetIntent("login").
+		SetProviderType("linuxdo").
+		SetProviderKey("linuxdo").
+		SetProviderSubject("login-nodecision-123").
+		SetTargetUserID(userEntity.ID).
+		SetResolvedEmail(userEntity.Email).
+		SetBrowserSessionKey("login-nodecision-browser-session-key").
+		SetUpstreamIdentityClaims(map[string]any{
+			"username": "login-nodecision-user",
+		}).
+		SetLocalFlowState(map[string]any{
+			oauthCompletionResponseKey: map[string]any{
+				"access_token": "access-token",
+			},
+		}).
+		SetExpiresAt(time.Now().UTC().Add(10 * time.Minute)).
+		Save(ctx)
+	require.NoError(t, err)
+
+	recorder := httptest.NewRecorder()
+	ginCtx, _ := gin.CreateTestContext(recorder)
+	req := httptest.NewRequest(http.MethodPost, "/api/v1/auth/oauth/pending/exchange", nil)
+	req.AddCookie(&http.Cookie{Name: oauthPendingSessionCookieName, Value: encodeCookieValue(session.SessionToken)})
+	req.AddCookie(&http.Cookie{Name: oauthPendingBrowserCookieName, Value: encodeCookieValue("login-nodecision-browser-session-key")})
+	ginCtx.Request = req
+
+	handler.ExchangePendingOAuthCompletion(ginCtx)
+
+	require.Equal(t, http.StatusOK, recorder.Code)
+
+	identity, err := client.AuthIdentity.Query().
+		Where(
+			authidentity.ProviderTypeEQ("linuxdo"),
+			authidentity.ProviderKeyEQ("linuxdo"),
+			authidentity.ProviderSubjectEQ("login-nodecision-123"),
+		).
+		Only(ctx)
+	require.NoError(t, err)
+	require.Equal(t, userEntity.ID, identity.UserID)
+
+	storedSession, err := client.PendingAuthSession.Query().
+		Where(pendingauthsession.IDEQ(session.ID)).
+		Only(ctx)
+	require.NoError(t, err)
+	require.NotNil(t, storedSession.ConsumedAt)
+}
+
 func TestExchangePendingOAuthCompletionBlocksBackendModeBeforeReturningTokenPayload(t *testing.T) {
 	handler, client := newOAuthPendingFlowTestHandlerWithDependencies(t, oauthPendingFlowTestHandlerOptions{
 		settingValues: map[string]string{

backend/internal/service/payment_order_lifecycle.go

@@ -190,8 +190,9 @@ func (s *PaymentService) VerifyOrderByOutTradeNo(ctx context.Context, outTradeNo
 	return o, nil
 }
 
-// VerifyOrderPublic verifies payment status without user authentication.
-// Used by the payment result page when the user's session has expired.
+// VerifyOrderPublic returns the currently persisted public order state without
+// triggering any upstream reconciliation. Signed resume-token recovery is the
+// only public recovery path allowed to query upstream state.
 func (s *PaymentService) VerifyOrderPublic(ctx context.Context, outTradeNo string) (*dbent.PaymentOrder, error) {
 	o, err := s.entClient.PaymentOrder.Query().
 		Where(paymentorder.OutTradeNo(outTradeNo)).
@@ -199,15 +200,6 @@ func (s *PaymentService) VerifyOrderPublic(ctx context.Context, outTradeNo strin
 	if err != nil {
 		return nil, infraerrors.NotFound("NOT_FOUND", "order not found")
 	}
-	if o.Status == OrderStatusPending || o.Status == OrderStatusExpired {
-		result := s.checkPaid(ctx, o)
-		if result == checkPaidResultAlreadyPaid {
-			o, err = s.entClient.PaymentOrder.Get(ctx, o.ID)
-			if err != nil {
-				return nil, fmt.Errorf("reload order: %w", err)
-			}
-		}
-	}
 	return o, nil
 }
 

backend/internal/service/payment_resume_lookup_test.go

@@ -200,3 +200,48 @@ func TestGetPublicOrderByResumeTokenChecksUpstreamForPendingOrder(t *testing.T)
 	require.Equal(t, order.ID, got.ID)
 	require.Equal(t, 1, provider.queryCount)
 }
+
+func TestVerifyOrderPublicDoesNotCheckUpstreamForPendingOrder(t *testing.T) {
+	ctx := context.Background()
+	client := newPaymentConfigServiceTestClient(t)
+	user, err := client.User.Create().
+		SetEmail("public-verify@example.com").
+		SetPasswordHash("hash").
+		SetUsername("public-verify-user").
+		Save(ctx)
+	require.NoError(t, err)
+
+	order, err := client.PaymentOrder.Create().
+		SetUserID(user.ID).
+		SetUserEmail(user.Email).
+		SetUserName(user.Username).
+		SetAmount(88).
+		SetPayAmount(88).
+		SetFeeRate(0).
+		SetRechargeCode("PUBLIC-VERIFY").
+		SetOutTradeNo("sub2_public_verify_pending").
+		SetPaymentType(payment.TypeAlipay).
+		SetPaymentTradeNo("trade-public-verify").
+		SetOrderType(payment.OrderTypeBalance).
+		SetStatus(OrderStatusPending).
+		SetExpiresAt(time.Now().Add(time.Hour)).
+		SetClientIP("127.0.0.1").
+		SetSrcHost("api.example.com").
+		Save(ctx)
+	require.NoError(t, err)
+
+	registry := payment.NewRegistry()
+	provider := &paymentResumeLookupProvider{}
+	registry.Register(provider)
+
+	svc := &PaymentService{
+		entClient:       client,
+		registry:        registry,
+		providersLoaded: true,
+	}
+
+	got, err := svc.VerifyOrderPublic(ctx, order.OutTradeNo)
+	require.NoError(t, err)
+	require.Equal(t, order.ID, got.ID)
+	require.Equal(t, 0, provider.queryCount)
+}

backend/internal/service/payment_resume_service.go

@@ -36,6 +36,9 @@ const (
 
 	paymentResumeNotConfiguredCode    = "PAYMENT_RESUME_NOT_CONFIGURED"
 	paymentResumeNotConfiguredMessage = "payment resume tokens require a configured signing key"
+
+	paymentResumeTokenTTL        = 24 * time.Hour
+	wechatPaymentResumeTokenTTL  = 15 * time.Minute
 )
 
 type ResumeTokenClaims struct {
@@ -46,6 +49,7 @@ type ResumeTokenClaims struct {
 	PaymentType        string `json:"pt,omitempty"`
 	CanonicalReturnURL string `json:"ru,omitempty"`
 	IssuedAt           int64  `json:"iat"`
+	ExpiresAt          int64  `json:"exp,omitempty"`
 }
 
 type WeChatPaymentResumeClaims struct {
@@ -58,6 +62,7 @@ type WeChatPaymentResumeClaims struct {
 	RedirectTo  string `json:"rd,omitempty"`
 	Scope       string `json:"scp,omitempty"`
 	IssuedAt    int64  `json:"iat"`
+	ExpiresAt   int64  `json:"exp,omitempty"`
 }
 
 type PaymentResumeService struct {
@@ -263,6 +268,9 @@ func (s *PaymentResumeService) CreateToken(claims ResumeTokenClaims) (string, er
 	if claims.IssuedAt == 0 {
 		claims.IssuedAt = time.Now().Unix()
 	}
+	if claims.ExpiresAt == 0 {
+		claims.ExpiresAt = time.Now().Add(paymentResumeTokenTTL).Unix()
+	}
 	return s.createSignedToken(claims)
 }
 
@@ -277,6 +285,9 @@ func (s *PaymentResumeService) ParseToken(token string) (*ResumeTokenClaims, err
 	if claims.OrderID <= 0 {
 		return nil, infraerrors.BadRequest("INVALID_RESUME_TOKEN", "resume token missing order id")
 	}
+	if err := validatePaymentResumeExpiry(claims.ExpiresAt, "INVALID_RESUME_TOKEN", "resume token has expired"); err != nil {
+		return nil, err
+	}
 	return &claims, nil
 }
 
@@ -291,6 +302,9 @@ func (s *PaymentResumeService) CreateWeChatPaymentResumeToken(claims WeChatPayme
 	if claims.IssuedAt == 0 {
 		claims.IssuedAt = time.Now().Unix()
 	}
+	if claims.ExpiresAt == 0 {
+		claims.ExpiresAt = time.Now().Add(wechatPaymentResumeTokenTTL).Unix()
+	}
 	if normalized := NormalizeVisibleMethod(claims.PaymentType); normalized != "" {
 		claims.PaymentType = normalized
 	}
@@ -319,6 +333,9 @@ func (s *PaymentResumeService) ParseWeChatPaymentResumeToken(token string) (*WeC
 	if claims.OpenID == "" {
 		return nil, infraerrors.BadRequest("INVALID_WECHAT_PAYMENT_RESUME_TOKEN", "wechat payment resume token missing openid")
 	}
+	if err := validatePaymentResumeExpiry(claims.ExpiresAt, "INVALID_WECHAT_PAYMENT_RESUME_TOKEN", "wechat payment resume token has expired"); err != nil {
+		return nil, err
+	}
 	if normalized := NormalizeVisibleMethod(claims.PaymentType); normalized != "" {
 		claims.PaymentType = normalized
 	}
@@ -355,6 +372,16 @@ func (s *PaymentResumeService) parseSignedToken(token string, dest any) error {
 	return json.Unmarshal(payload, dest)
 }
 
+func validatePaymentResumeExpiry(expiresAt int64, code, message string) error {
+	if expiresAt <= 0 {
+		return nil
+	}
+	if time.Now().Unix() > expiresAt {
+		return infraerrors.BadRequest(code, message)
+	}
+	return nil
+}
+
 func (s *PaymentResumeService) sign(payload string) string {
 	mac := hmac.New(sha256.New, s.signingKey)
 	_, _ = mac.Write([]byte(payload))

backend/internal/service/payment_resume_service_test.go

@@ -11,6 +11,7 @@ import (
 	"net/url"
 	"strconv"
 	"testing"
+	"time"
 
 	"github.com/Wei-Shaw/sub2api/internal/payment"
 )
@@ -175,6 +176,26 @@ func TestParseTokenRejectsFallbackSignedTokenWhenSigningKeyMissing(t *testing.T)
 	}
 }
 
+func TestParseTokenRejectsExpiredToken(t *testing.T) {
+	t.Parallel()
+
+	svc := NewPaymentResumeService([]byte("0123456789abcdef0123456789abcdef"))
+	token, err := svc.CreateToken(ResumeTokenClaims{
+		OrderID:   42,
+		UserID:    7,
+		IssuedAt:  time.Now().Add(-25 * time.Hour).Unix(),
+		ExpiresAt: time.Now().Add(-1 * time.Hour).Unix(),
+	})
+	if err != nil {
+		t.Fatalf("CreateToken returned error: %v", err)
+	}
+
+	_, err = svc.ParseToken(token)
+	if err == nil {
+		t.Fatal("ParseToken should reject expired tokens")
+	}
+}
+
 func TestWeChatPaymentResumeTokenRoundTrip(t *testing.T) {
 	t.Parallel()
 
@@ -233,6 +254,26 @@ func TestParseWeChatPaymentResumeTokenRejectsFallbackSignedTokenWhenSigningKeyMi
 	}
 }
 
+func TestParseWeChatPaymentResumeTokenRejectsExpiredToken(t *testing.T) {
+	t.Parallel()
+
+	svc := NewPaymentResumeService([]byte("0123456789abcdef0123456789abcdef"))
+	token, err := svc.CreateWeChatPaymentResumeToken(WeChatPaymentResumeClaims{
+		OpenID:      "openid-123",
+		PaymentType: payment.TypeWxpay,
+		IssuedAt:    time.Now().Add(-30 * time.Minute).Unix(),
+		ExpiresAt:   time.Now().Add(-1 * time.Minute).Unix(),
+	})
+	if err != nil {
+		t.Fatalf("CreateWeChatPaymentResumeToken returned error: %v", err)
+	}
+
+	_, err = svc.ParseWeChatPaymentResumeToken(token)
+	if err == nil {
+		t.Fatal("ParseWeChatPaymentResumeToken should reject expired tokens")
+	}
+}
+
 func TestNormalizeVisibleMethodSource(t *testing.T) {
 	t.Parallel()
 

frontend/src/views/user/PaymentResultView.vue

@@ -219,7 +219,6 @@ onMounted(async () => {
   const routeOrderId = Number(route.query.order_id) || 0
   const outTradeNo = String(route.query.out_trade_no || '')
   let orderId = 0
-  let canUseLegacyPublicVerify = false
 
   if (resumeToken && typeof window !== 'undefined') {
     const restored = readPaymentRecoverySnapshot(
@@ -264,23 +263,12 @@ onMounted(async () => {
   const hasLegacyFallbackContext = typeof route.query.trade_status === 'string'
     && route.query.trade_status.trim() !== ''
   if (!order.value && !resumeToken && !orderId && outTradeNo && hasLegacyFallbackContext) {
-    canUseLegacyPublicVerify = true
     returnInfo.value = {
       outTradeNo,
       money: String(route.query.money || ''),
       type: String(route.query.type || ''),
       tradeStatus: String(route.query.trade_status || ''),
     }
-
-    try {
-      const result = await paymentAPI.verifyOrderPublic(outTradeNo)
-      order.value = result.data
-    } catch (_err: unknown) {
-      try {
-        const result = await paymentAPI.verifyOrder(outTradeNo)
-        order.value = result.data
-      } catch (_e: unknown) { /* fall through */ }
-    }
   }
 
   const refreshOrder = async (): Promise<PaymentOrder | null> => {
@@ -292,20 +280,6 @@ onMounted(async () => {
       return await paymentStore.pollOrderStatus(orderId)
     }
 
-    if (canUseLegacyPublicVerify && outTradeNo) {
-      try {
-        const result = await paymentAPI.verifyOrderPublic(outTradeNo)
-        return result.data
-      } catch (_err: unknown) {
-        try {
-          const result = await paymentAPI.verifyOrder(outTradeNo)
-          return result.data
-        } catch (_e: unknown) {
-          return null
-        }
-      }
-    }
-
     return null
   }
 

frontend/src/views/user/__tests__/PaymentResultView.spec.ts

@@ -225,16 +225,13 @@ describe('PaymentResultView', () => {
     expect(verifyOrder).not.toHaveBeenCalled()
   })
 
-  it('keeps legacy out_trade_no verification as a fallback when no order context is available', async () => {
+  it('does not use anonymous out_trade_no verification when no signed resume context is available', async () => {
     routeState.query = {
       out_trade_no: 'legacy-123',
       trade_status: 'TRADE_SUCCESS',
     }
-    verifyOrderPublic.mockResolvedValue({
-      data: orderFactory('PAID'),
-    })
 
-    const wrapper = mount(PaymentResultView, {
+    mount(PaymentResultView, {
       global: {
         stubs: {
           OrderStatusBadge: true,
@@ -244,8 +241,8 @@ describe('PaymentResultView', () => {
 
     await flushPromises()
 
-    expect(verifyOrderPublic).toHaveBeenCalledWith('legacy-123')
-    expect(wrapper.text()).toContain('payment.result.success')
+    expect(verifyOrderPublic).not.toHaveBeenCalled()
+    expect(verifyOrder).not.toHaveBeenCalled()
   })
 
   it('does not use public out_trade_no verification for bare order numbers without legacy return markers', async () => {