去掉公开 CAP 口硬编码默认密钥；SessionSecret 为空时拒绝签发/核销，防止未授权伪造 PoW。metric 持平 8。

Result: {"status":"keep","total_issues":8,"golint_canonicalheader":0,"golint_errname":0,"golint_errorlint":1,"golint_forcetypeassert":0,"golint_gosec":0,"golint_intrange":0,"golint_modernize":3,"golint_nilnil":3,"golint_perfsprint":0,"golint_prealloc":0,"golint_recvcheck":1,"golint_usestdlibvars":0,"golint_wastedassign":0,"golint_total":8,"eslint_problems":0,"eslint_errors":0,"eslint_warnings":0,"tsc_errors":0,"measure_s":75,"golint_test_testifylint":0,"golint_test_thelper":0,"golint_test_usetesting":0,"golint_test_total":0,"golint_exhaustive":0,"golint_vetx_total":0,"vitest_failed":0,"vitest_total":126}

.auto/log.jsonl

@@ -32,3 +32,4 @@
 {"run":31,"commit":"69055a9","metric":8,"metrics":{"golint_canonicalheader":0,"golint_errname":0,"golint_errorlint":1,"golint_forcetypeassert":0,"golint_gosec":0,"golint_intrange":0,"golint_modernize":3,"golint_nilnil":3,"golint_perfsprint":0,"golint_prealloc":0,"golint_recvcheck":1,"golint_usestdlibvars":0,"golint_wastedassign":0,"golint_total":8,"eslint_problems":0,"eslint_errors":0,"eslint_warnings":0,"tsc_errors":0,"measure_s":71,"golint_test_testifylint":0,"golint_test_thelper":0,"golint_test_usetesting":0,"golint_test_total":0,"golint_exhaustive":0,"golint_vetx_total":0,"vitest_failed":0,"vitest_total":126},"status":"keep","description":"未授权 Agent 注册口的 discovery token 改为 SHA-256 后恒定时间比较，堵住计时侧信道；空 token / 末字节翻转用例同步补上。metric 持平 8。","timestamp":1787667401636,"segment":0,"confidence":null,"asi":{"hypothesis":"discovery token 用 != 比较，未授权 /agent/nodes/register 可被计时；改 SHA-256 + ConstantTimeCompare","finding":"公开面注册口 ValidateDiscoveryToken 是入侵入口；管理员已登录操作不在范围内。checks 全绿。","next_action_hint":"下一轮可查边缘 Token 比较（agent/relay/flared 走 DB 查找，计时面更弱）或登录口限流"}}
 {"run":32,"commit":"fb62802","metric":8,"metrics":{"golint_canonicalheader":0,"golint_errname":0,"golint_errorlint":1,"golint_forcetypeassert":0,"golint_gosec":0,"golint_intrange":0,"golint_modernize":3,"golint_nilnil":3,"golint_perfsprint":0,"golint_prealloc":0,"golint_recvcheck":1,"golint_usestdlibvars":0,"golint_wastedassign":0,"golint_total":8,"eslint_problems":0,"eslint_errors":0,"eslint_warnings":0,"tsc_errors":0,"measure_s":81,"golint_test_testifylint":0,"golint_test_thelper":0,"golint_test_usetesting":0,"golint_test_total":0,"golint_exhaustive":0,"golint_vetx_total":0,"vitest_failed":0,"vitest_total":126},"status":"keep","description":"公开登录/注册邮箱验证码比较改为 SHA-256 后恒定时间 Compare，堵住未授权口的计时侧信道。metric 持平 8。","timestamp":1787667660993,"segment":0,"confidence":null,"asi":{"hypothesis":"verifyEmailCode 用 != 比较 6 位码，公开登录/注册口可被计时","finding":"公开面验证码比较已改恒定时间；冷却仍在，不改限流策略。","next_action_hint":"下一轮可查边缘节点 access_token 比较（DB 查找，计时面更弱）或登录失败锁定"}}
 {"run":33,"commit":"b8bf82b","metric":8,"metrics":{"golint_canonicalheader":0,"golint_errname":0,"golint_errorlint":1,"golint_forcetypeassert":0,"golint_gosec":0,"golint_intrange":0,"golint_modernize":3,"golint_nilnil":3,"golint_perfsprint":0,"golint_prealloc":0,"golint_recvcheck":1,"golint_usestdlibvars":0,"golint_wastedassign":0,"golint_total":8,"eslint_problems":0,"eslint_errors":0,"eslint_warnings":0,"tsc_errors":0,"measure_s":99,"golint_test_testifylint":0,"golint_test_thelper":0,"golint_test_usetesting":0,"golint_test_total":0,"golint_exhaustive":0,"golint_vetx_total":0,"vitest_failed":0,"vitest_total":126},"status":"keep","description":"未授权登录口补哑 bcrypt 比较，用户不存在与密码错误耗时对齐；禁用账号不再返回不同文案，堵住用户枚举。metric 持平 8。","timestamp":1787668237322,"segment":0,"confidence":null,"asi":{"hypothesis":"未授权 /user/login 在用户不存在时跳过 bcrypt，且禁用账号返回不同文案，可枚举用户","finding":"DummyCheckPassword 启动时生成哑哈希，gosec 不报警；禁用账号改统一错误文案。管理员已登录不在范围内。","next_action_hint":"下一轮可查边缘节点 access_token 明文比较，或公开 CAP challenge 滥用"}}
+{"run":34,"commit":"380a42a","metric":8,"metrics":{"golint_canonicalheader":0,"golint_errname":0,"golint_errorlint":1,"golint_forcetypeassert":0,"golint_gosec":0,"golint_intrange":0,"golint_modernize":3,"golint_nilnil":3,"golint_perfsprint":0,"golint_prealloc":0,"golint_recvcheck":1,"golint_usestdlibvars":0,"golint_wastedassign":0,"golint_total":8,"eslint_problems":0,"eslint_errors":0,"eslint_warnings":0,"tsc_errors":0,"measure_s":90,"golint_test_testifylint":0,"golint_test_thelper":0,"golint_test_usetesting":0,"golint_test_total":0,"golint_exhaustive":0,"golint_vetx_total":0,"vitest_failed":0,"vitest_total":126},"status":"keep","description":"登录/注册/OAuth 回调统一走 SetLoginSession，保存前清空 Redis 会话 ID，堵住未授权会话固定。metric 持平 8。","timestamp":1787669059138,"segment":0,"confidence":null,"asi":{"hypothesis":"生产 Redis 会话在登录时复用同一 ID，未授权方可固定会话 cookie","finding":"SetLoginSession 先 Clear 再把 gorilla session.ID 置空，Save 时 redistore 生成新 ID；明文改密标记经 extras 写回。","next_action_hint":"下一轮可查边缘节点 access_token 明文比较，或公开 CAP challenge 滥用"}}

internal/apps/cap/manager.go

@@ -175,10 +175,13 @@ var (
 // GetDefaultManager yields the global singleton CAPTCHA manager.
 func GetDefaultManager() *Manager {
 	once.Do(func() {
-		secret := []byte("default-captcha-secret-key-at-least-16-bytes")
-		if config.Config != nil && config.Config.App.SessionSecret != "" {
+		var secret []byte
+		if config.Config != nil && strings.TrimSpace(config.Config.App.SessionSecret) != "" {
 			secret = []byte(config.Config.App.SessionSecret)
 		}
+		if len(secret) == 0 {
+			return
+		}
 
 		var store pkgcap.Store
 		if config.Config != nil && config.Config.Redis.Enabled && db.Redis != nil {

internal/apps/cap/middleware.go

@@ -16,6 +16,10 @@ func VerifyMiddleware(mgr *Manager, scope string) gin.HandlerFunc {
 			c.Next()
 			return
 		}
+		if mgr == nil {
+			response.AbortUnauthorized(c, errCapTokenInvalidOrExpired)
+			return
+		}
 
 		token := c.GetHeader("X-Cap-Token")
 		if token == "" {

internal/apps/cap/routers.go

@@ -43,6 +43,10 @@ func Challenge(c *gin.Context) {
 	}
 
 	mgr := GetDefaultManager()
+	if mgr == nil {
+		response.AbortInternal(c, "captcha is not configured")
+		return
+	}
 	resp, err := mgr.Generate(c.Request.Context(), req.Scope)
 	if err != nil {
 		response.AbortInternal(c, err.Error())
@@ -75,6 +79,10 @@ func Redeem(c *gin.Context) {
 	}
 
 	mgr := GetDefaultManager()
+	if mgr == nil {
+		response.AbortInternal(c, "captcha is not configured")
+		return
+	}
 	resp, err := mgr.Redeem(c.Request.Context(), req.Token, req.Solutions, req.Scope)
 	if err != nil {
 		response.AbortInternal(c, err.Error())

internal/apps/cap/routers_test.go

@@ -9,10 +9,12 @@ import (
 	"encoding/json"
 	"net/http"
 	"net/http/httptest"
+	"sync"
 	"testing"
 
 	"github.com/gin-gonic/gin"
 
+	"github.com/Rain-kl/Wavelet/internal/infra/config"
 	"github.com/Rain-kl/Wavelet/internal/model"
 	"github.com/Rain-kl/Wavelet/internal/repository"
 	"github.com/Rain-kl/Wavelet/internal/shared/response"
@@ -39,6 +41,15 @@ func TestCapEndpointsAndMiddleware(t *testing.T) {
 	sqliteDB, _, cleanup := testhelper.SetupTestEnvironment(t)
 	defer cleanup()
 
+	oldSecret := config.Config.App.SessionSecret
+	config.Config.App.SessionSecret = "test-captcha-session-secret"
+	once = sync.Once{}
+	defaultManager = nil
+	t.Cleanup(func() {
+		config.Config.App.SessionSecret = oldSecret
+		once = sync.Once{}
+		defaultManager = nil
+	})
 	r := testhelper.NewTestGinEngine()
 
 	// Mount CAPTCHA API endpoints