fix: 开启自助注册须先有 8-64 字符安全码

docs/DEVIATIONS.md

@@ -1358,3 +1358,12 @@ issue #3 未关闭，`feat/fix-3-downlink-deadlock` 未合入 `main`。下面是
 - 原因：只关 listener 时 MQTT 客户端看不到规范的停机原因码。
 - 备选方案：等 L-03 一并做（本线仍提供 broker API，避免监听线无法调用）。
 - 影响：进程退出时端会收到 server shutting down；监听器 HTTP 优雅停机仍未做。
+
+### 复审修复 U-01
+
+1. **开启自助注册必须已有 8–64 字符安全码**  
+   - 原条款：PRD F23 / D14：管理员开启并设置注册安全码（8–64 字符）；注册必须带当前安全码。  
+   - 实际做法：`register()` 在锁定检查前，若存储码不是 8–64 字符则 403 `registration_closed` 并记不含码的警告，不计入锁定。`PUT /api/admin/registration` 在同一写操作末尾读回开关与安全码，开启且码不合法则 400 并回滚；允许一次提交 `enabled`+`code`/`generate`。后台无已保存安全码时禁用开关。  
+   - 原因：新库无码行或空码时 `constantTimeEqual("", "")` 为真，只开开关即可裸注册。  
+   - 备选方案：仅拦管理 PUT、不拦已处于「开启+空码」的旧库（否决，缺少纵深防御）。  
+   - 影响：原先「先开开关再设码」的两步会 400；须先设码或一次提交开启与码。

docs/api/admin-api.md

@@ -396,6 +396,8 @@ Authorization: Bearer nxm_...
 ```
 
 - `generate: true` 时服务器生成 16 位安全码并忽略请求里的 `code`。
+- 允许一次提交 `{"enabled":true,"code":"..."}` 或 `{"enabled":true,"generate":true}`。
+- 最终状态为开启时，安全码必须是 8–64 字符；仅 `{"enabled":true}` 且库中没有合法安全码时返回 400，整次更新回滚。
 - 成功 `data` 同 GET。
 
 ---

internal/admin/a3_test.go

@@ -134,6 +134,66 @@ func TestRegistrationToggleAndGenerate(t *testing.T) {
 	}
 }
 
+func TestRegistrationEnableRequiresCode(t *testing.T) {
+	db, srv, client := setupA3(t)
+	base := srv.URL
+
+	res := doReq(t, client, http.MethodPut, base+"/api/admin/registration",
+		`{"enabled":true}`, csrf())
+	env := decodeEnv(t, res)
+	if res.StatusCode != 400 || env.OK {
+		t.Fatalf("enable without code: %d %+v", res.StatusCode, env)
+	}
+	if env.Error == nil || !strings.Contains(env.Error.Message, "8–64") {
+		t.Fatalf("want 8–64 message, got %+v", env.Error)
+	}
+
+	res = doReq(t, client, http.MethodGet, base+"/api/admin/registration", "", nil)
+	env = decodeEnv(t, res)
+	var got map[string]any
+	_ = json.Unmarshal(env.Data, &got)
+	if got["enabled"] != false {
+		t.Fatalf("switch must stay off after 400: %v", got)
+	}
+	var n int
+	if err := db.Read.QueryRow(`SELECT COUNT(*) FROM settings WHERE key = ? AND value = '1'`, "registration_enabled").Scan(&n); err != nil {
+		t.Fatal(err)
+	}
+	if n != 0 {
+		t.Fatalf("enabled setting rolled back, count=%d", n)
+	}
+
+	res = doReq(t, client, http.MethodPut, base+"/api/admin/registration",
+		`{"enabled":true,"generate":true}`, csrf())
+	env = decodeEnv(t, res)
+	if res.StatusCode != 200 || !env.OK {
+		t.Fatalf("enable+generate: %d %+v", res.StatusCode, env)
+	}
+	_ = json.Unmarshal(env.Data, &got)
+	code, _ := got["code"].(string)
+	if got["enabled"] != true || len(code) != 16 {
+		t.Fatalf("after generate: %v", got)
+	}
+
+	res = doReq(t, client, http.MethodPut, base+"/api/admin/registration",
+		`{"enabled":false}`, csrf())
+	if res.StatusCode != 200 {
+		t.Fatalf("disable: %d", res.StatusCode)
+	}
+	_ = res.Body.Close()
+
+	res = doReq(t, client, http.MethodPut, base+"/api/admin/registration",
+		`{"enabled":true,"code":"abcdefgh"}`, csrf())
+	env = decodeEnv(t, res)
+	if res.StatusCode != 200 || !env.OK {
+		t.Fatalf("enable+code: %d %+v", res.StatusCode, env)
+	}
+	_ = json.Unmarshal(env.Data, &got)
+	if got["enabled"] != true || got["code"] != "abcdefgh" {
+		t.Fatalf("after enable+code: %v", got)
+	}
+}
+
 func TestMessageDetailHasNoBody(t *testing.T) {
 	db, srv, client := setupA3(t)
 	base := srv.URL

internal/admin/registration.go

@@ -77,9 +77,7 @@ func (h *Handler) handleRegistrationPut(w http.ResponseWriter, r *http.Request)
 			); e != nil {
 				return e
 			}
-			return nil
+		} else if req.Code != nil {
-		}
-		if req.Code != nil {
 			code := *req.Code
 			n := utf8.RuneCountInString(code)
 			if n < minRegistrationCodeLen || n > maxRegistrationCodeLen {
@@ -93,6 +91,18 @@ func (h *Handler) handleRegistrationPut(w http.ResponseWriter, r *http.Request)
 				return e
 			}
 		}
+
+		var enabledVal, codeVal sql.NullString
+		if e := tx.QueryRow(`SELECT value FROM settings WHERE key = ?`, settingRegistrationEnabled).Scan(&enabledVal); e != nil && !errors.Is(e, sql.ErrNoRows) {
+			return e
+		}
+		if e := tx.QueryRow(`SELECT value FROM settings WHERE key = ?`, settingRegistrationCode).Scan(&codeVal); e != nil && !errors.Is(e, sql.ErrNoRows) {
+			return e
+		}
+		n := utf8.RuneCountInString(codeVal.String)
+		if registrationTruthy(enabledVal.String) && (n < minRegistrationCodeLen || n > maxRegistrationCodeLen) {
+			return errBadRequest("开启自助注册前须先设置 8–64 字符的安全码")
+		}
 		return nil
 	})
 	if err != nil {

internal/app/identity/register.go

@@ -25,6 +25,9 @@ const (
 	settingRegistrationEnabled = "registration_enabled"
 	settingRegistrationCode    = "registration_code"
 
+	minRegistrationCodeLen = 8
+	maxRegistrationCodeLen = 64
+
 	sourceSelf = "self"
 
 	idAlphabet = "abcdefghijklmnopqrstuvwxyz0123456789"
@@ -144,6 +147,11 @@ func (h *RegisterHandler) register(ctx context.Context, req *protocol.RegisterRe
 	if !enabled {
 		return RegisterResult{}, apiErr(http.StatusForbidden, protocol.CodeRegistrationClosed, "registration closed")
 	}
+	// 存储码不是 8–64 字符时视为关闭（含开启+空码的旧库）。放在锁定检查之前，不计入锁定。
+	if n := utf8.RuneCountInString(storedCode); n < minRegistrationCodeLen || n > maxRegistrationCodeLen {
+		h.cfg.Logger.Warn("register", "result", protocol.CodeRegistrationClosed, "reason", "unusable_code", "ip", ip)
+		return RegisterResult{}, apiErr(http.StatusForbidden, protocol.CodeRegistrationClosed, "registration closed")
+	}
 
 	lockKey := auth.LockKey{Kind: auth.LockRegisterIP, IP: ip}
 	if locked, _ := h.cfg.Locks.Check(lockKey); locked {

internal/app/identity/register_test.go

@@ -141,6 +141,33 @@ func openTestEnv(t *testing.T) *testEnv {
 	return env
 }
 
+func (e *testEnv) setEnabledOnly(t *testing.T, enabled bool) {
+	t.Helper()
+	en := "0"
+	if enabled {
+		en = "1"
+	}
+	now := time.Now().UnixMilli()
+	err := e.db.Queue.Do(context.Background(), func(tx *sql.Tx) error {
+		if _, err := tx.Exec(`INSERT INTO settings(key, value, updated_at) VALUES(?, ?, ?)
+			ON CONFLICT(key) DO UPDATE SET value=excluded.value, updated_at=excluded.updated_at`,
+			settingRegistrationEnabled, en, now); err != nil {
+			return err
+		}
+		_, err := tx.Exec(`DELETE FROM settings WHERE key = ?`, settingRegistrationCode)
+		return err
+	})
+	if err != nil {
+		t.Fatal(err)
+	}
+}
+
+func (l *registerIPLocker) failCount(ip string) int {
+	l.mu.Lock()
+	defer l.mu.Unlock()
+	return len(l.fails[ip])
+}
+
 func (e *testEnv) setRegistration(t *testing.T, enabled bool, code string) {
 	t.Helper()
 	en := "0"
@@ -233,6 +260,43 @@ func TestRegisterF23_ClosedFails(t *testing.T) {
 	}
 }
 
+func TestRegister_EnabledWithoutUsableCodeIsClosed(t *testing.T) {
+	cases := []struct {
+		name string
+		prep func(*testEnv, *testing.T)
+	}{
+		{"no_code_row", func(env *testEnv, t *testing.T) { env.setEnabledOnly(t, true) }},
+		{"empty_code", func(env *testEnv, t *testing.T) { env.setRegistration(t, true, "") }},
+		{"short_code", func(env *testEnv, t *testing.T) { env.setRegistration(t, true, "short") }},
+	}
+	bodies := []string{
+		`{"registration_code":"","id":"ep_empty","login_password":"password1"}`,
+		`{"registration_code":"anything1","id":"ep_any","login_password":"password1"}`,
+	}
+	for _, tc := range cases {
+		t.Run(tc.name, func(t *testing.T) {
+			env := openTestEnv(t)
+			tc.prep(env, t)
+			for _, body := range bodies {
+				code, resp, _ := env.doRegister(t, body)
+				if code != http.StatusForbidden || resp.Error == nil || resp.Error.Code != protocol.CodeRegistrationClosed {
+					t.Fatalf("body=%s status=%d resp=%+v", body, code, resp)
+				}
+			}
+			if env.locks.failCount(env.fixedIP) != 0 {
+				t.Fatalf("unusable code must not count as lock fail: %d", env.locks.failCount(env.fixedIP))
+			}
+			logged := env.logBuf.String()
+			if strings.Contains(logged, "anything1") || strings.Contains(logged, "short") {
+				t.Fatalf("log leaked code: %s", logged)
+			}
+			if !strings.Contains(logged, "unusable_code") {
+				t.Fatalf("missing warn: %s", logged)
+			}
+		})
+	}
+}
+
 func TestRegisterF23_WrongCodeFails_RightCodeOK(t *testing.T) {
 	env := openTestEnv(t)
 	env.setRegistration(t, true, "good-code-01")

web/e2e/admin-main.spec.ts

@@ -106,11 +106,12 @@ test.describe("后台主路径 W4", () => {
 
     await nav(page, "注册设置");
     await expect(page).toHaveURL(/\/registration/);
-    await page.getByTestId("reg-enabled").click();
+    await expect(page.getByTestId("reg-code-missing")).toBeVisible();
-    await expect(page.getByText("已开启自助注册")).toBeVisible();
     await page.getByTestId("reg-code").locator("input").fill("w4-reg-code-01");
     await page.getByTestId("reg-save-code").click();
     await expect(page.getByText("安全码已更新")).toBeVisible();
+    await page.getByTestId("reg-enabled").click();
+    await expect(page.getByText("已开启自助注册")).toBeVisible();
 
     await nav(page, "群");
     await expect(page).toHaveURL(/\/groups/);

web/src/views/RegistrationView.spec.ts

@@ -0,0 +1,53 @@
+import { config, mount, flushPromises } from "@vue/test-utils";
+import { createPinia, setActivePinia } from "pinia";
+import { beforeEach, describe, expect, it, vi } from "vitest";
+import {
+  NConfigProvider,
+  NDialogProvider,
+  NMessageProvider,
+  dateZhCN,
+  zhCN,
+} from "naive-ui";
+import { defineComponent, h } from "vue";
+import RegistrationView from "./RegistrationView.vue";
+import { mockApi } from "@/api/mock";
+
+vi.mock("@/api/admin", async () => import("@/api/admin-mock"));
+
+config.global.stubs = { teleport: true };
+
+function wrap(Comp: object) {
+  return defineComponent({
+    setup() {
+      return () =>
+        h(NConfigProvider, { locale: zhCN, dateLocale: dateZhCN, size: "small" }, {
+          default: () =>
+            h(NMessageProvider, null, {
+              default: () =>
+                h(NDialogProvider, null, {
+                  default: () => h(Comp),
+                }),
+            }),
+        });
+    },
+  });
+}
+
+describe("RegistrationView", () => {
+  beforeEach(() => {
+    setActivePinia(createPinia());
+    mockApi._setSession();
+  });
+
+  it("已有安全码时不显示缺码提示", async () => {
+    const pinia = createPinia();
+    const w = mount(wrap(RegistrationView), {
+      global: { plugins: [pinia] },
+      attachTo: document.body,
+    });
+    await flushPromises();
+    expect(w.get('[data-testid="reg-enabled"]').exists()).toBe(true);
+    expect(w.find('[data-testid="reg-code-missing"]').exists()).toBe(false);
+    w.unmount();
+  });
+});

web/src/views/RegistrationView.vue

@@ -1,6 +1,6 @@
 <script setup lang="ts">
-import { onMounted, ref } from "vue";
+import { computed, onMounted, ref } from "vue";
-import { NButton, NForm, NFormItem, NInput, NSpace, NSpin, NSwitch, NText } from "naive-ui";
+import { NAlert, NButton, NForm, NFormItem, NInput, NSpace, NSpin, NSwitch, NText } from "naive-ui";
 import PageHeader from "@/components/PageHeader.vue";
 import HelpTip from "@/components/HelpTip.vue";
 import { getRegistration, updateRegistration, type RegistrationSettings } from "@/api/admin";
@@ -12,6 +12,9 @@ const saving = ref(false);
 const data = ref<RegistrationSettings | null>(null);
 const codeDraft = ref("");
 
+const hasSavedCode = computed(() => (data.value?.code ?? "").length >= 8);
+const switchDisabled = computed(() => !hasSavedCode.value && !data.value?.enabled);
+
 async function load() {
   loading.value = true;
   try {
@@ -28,6 +31,10 @@ onMounted(() => {
 
 async function onToggle(enabled: boolean) {
   if (!data.value) return;
+  if (enabled && !hasSavedCode.value) {
+    message.error("请先保存或生成安全码");
+    return;
+  }
   saving.value = true;
   try {
     data.value = await updateRegistration({ enabled });
@@ -66,6 +73,13 @@ async function generateCode() {
     <div class="page-body">
       <n-spin :show="loading">
         <n-form v-if="data" label-placement="left" label-width="100" :show-feedback="false" style="max-width: 560px">
+          <n-alert
+            v-if="!hasSavedCode"
+            type="warning"
+            title="请先保存或生成安全码"
+            data-testid="reg-code-missing"
+            style="margin-bottom: 12px"
+          />
           <n-form-item>
             <template #label>
               开放注册
@@ -74,6 +88,7 @@ async function generateCode() {
             <n-switch
               :value="data.enabled"
               :loading="saving"
+              :disabled="switchDisabled"
               data-testid="reg-enabled"
               @update:value="onToggle"
             />
@@ -88,7 +103,7 @@ async function generateCode() {
             <n-button type="primary" :loading="saving" data-testid="reg-save-code" @click="saveCode">
               保存安全码
             </n-button>
-            <n-button :loading="saving" @click="generateCode">生成安全码</n-button>
+            <n-button :loading="saving" data-testid="reg-generate-code" @click="generateCode">生成安全码</n-button>
           </n-space>
         </n-form>
       </n-spin>