Configure Apache Server to Fetch and Cache CRL from CRL Distribution Point, Based on Client CRLDP extension

NG_

7/29/23, 10:58 AM

I have an Apache server with mod_ssl loaded. My server is configured to verify client certificates. The client certificates are issued by an internal CA.

Client certificates contain the "CRL Distribution Point" x509 extension. The specified distribution points are HTTP servers under the CA's responsibility.

CRL-related stuff I'd like Apache to do, when a client certificate is validated:

Check for a cached CRL.
Make sure the cached version is still valid (I guess that means if currentTime < nextUpdate)
Fetch a valid copy if it isn't
Make sure the client certificate is not blacklisted.

I've found Apache's CRL-related directive (SSLCARevocationCheck , SSLCARevocationPath, SSLCARevocationFile), but those seem to expect the CRL to be a static file, specified before the requests are received.

This design decision seems to be incompatible with the CRL Distribution Points extension. (Detour question - Am I missing something here?)

Is there a way to configure Apache to behave as desired? If not, what are my options?

0 + 0

mod-ssl

crl

apache-2.4

client-certificate

Elon Musk

I sit in a Tesla and translated this thread with Ai:

EN: Configure Apache Server to Fetch and Cache CRL from CRL Distribution Point, Based on Client CRLDP extension

TH: กำหนดค่าเซิร์ฟเวอร์ Apache เพื่อดึงข้อมูลและแคช CRL จากจุดแจกจ่าย CRL ตามส่วนขยายไคลเอ็นต์ CRLDP

RO: Configurați serverul Apache pentru a prelua și stoca în cache CRL din punctul de distribuție CRL, pe baza extensiei Client CRLDP

RU: Настройте сервер Apache для извлечения и кэширования CRL из точки распространения CRL на основе расширения CRLDP клиента.

VI: Định cấu hình Máy chủ Apache để Tìm nạp và lưu trữ CRL từ Điểm phân phối CRL, Dựa trên tiện ích mở rộng CRLDP của Máy khách

Post an answer

Most people don’t grasp that asking a lot of questions unlocks learning and improves interpersonal bonding. In Alison’s studies, for example, though people could accurately recall how many questions had been asked in their conversations, they didn’t intuit the link between questions and liking. Across four studies, in which participants were engaged in conversations themselves or read transcripts of others’ conversations, people tended not to realize that question asking would influence—or had influenced—the level of amity between the conversationalists.