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backend/internal/runtime/executor/helps/cloak_utils.go

@@ -0,0 +1,69 @@
+package helps
+
+import (
+	"crypto/rand"
+	"encoding/hex"
+	"encoding/json"
+	"regexp"
+
+	"github.com/google/uuid"
+)
+
+var claudeMetadataDeviceIDPattern = regexp.MustCompile(`^[a-f0-9]{64}$`)
+
+type claudeMetadataUserID struct {
+	DeviceID    string `json:"device_id"`
+	AccountUUID string `json:"account_uuid"`
+	SessionID   string `json:"session_id"`
+}
+
+// generateFakeUserID generates metadata.user_id in the JSON string format used
+// by Claude Code 2.1.78 and newer.
+func generateFakeUserID() string {
+	return generateFakeUserIDWithSessionID(uuid.New().String())
+}
+
+func generateFakeUserIDWithSessionID(sessionID string) string {
+	if _, errParse := uuid.Parse(sessionID); errParse != nil {
+		sessionID = uuid.New().String()
+	}
+	hexBytes := make([]byte, 32)
+	_, _ = rand.Read(hexBytes)
+	value, _ := json.Marshal(claudeMetadataUserID{
+		DeviceID:    hex.EncodeToString(hexBytes),
+		AccountUUID: "",
+		SessionID:   sessionID,
+	})
+	return string(value)
+}
+
+// isValidUserID checks the Claude Code 2.1.220 metadata.user_id shape.
+func isValidUserID(userID string) bool {
+	var value claudeMetadataUserID
+	if errUnmarshal := json.Unmarshal([]byte(userID), &value); errUnmarshal != nil {
+		return false
+	}
+	if !claudeMetadataDeviceIDPattern.MatchString(value.DeviceID) {
+		return false
+	}
+	if _, errParse := uuid.Parse(value.SessionID); errParse != nil {
+		return false
+	}
+	if value.AccountUUID == "" {
+		return true
+	}
+	_, errParse := uuid.Parse(value.AccountUUID)
+	return errParse == nil
+}
+
+func GenerateFakeUserID() string {
+	return generateFakeUserID()
+}
+
+func GenerateFakeUserIDWithSessionID(sessionID string) string {
+	return generateFakeUserIDWithSessionID(sessionID)
+}
+
+func IsValidUserID(userID string) bool {
+	return isValidUserID(userID)
+}