From 9608e8a7ffeaf7767545628fa266501c6a271f24 Mon Sep 17 00:00:00 2001
From: Benjamin Demarteau <benjamin.demarteau@liege.be>
Date: Wed, 14 Jul 2021 10:08:00 +0000
Subject: [PATCH] mod_ssl: Expose serialNumber (2.5.4.5) as standard env var
 from certificate DN

serialNumber (2.5.4.5) is a standard LDAP attribute embedded in the subject's
and/or issuer's DN, extract it by standard means from the DN and expose
via StdEnvVars.

This fixes BZ #35154.

Co-authored-by: Michael Osipov <michaelo@apache.org>
---
 modules/ssl/ssl_engine_vars.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/modules/ssl/ssl_engine_vars.c b/modules/ssl/ssl_engine_vars.c
index 6c45b65d400..83344bf8600 100644
--- a/modules/ssl/ssl_engine_vars.c
+++ b/modules/ssl/ssl_engine_vars.c
@@ -720,6 +720,7 @@ static const struct {
     { "G",     NID_givenName,              1 },
     { "S",     NID_surname,                1 },
     { "D",     NID_description,            1 },
+    { "SerialNumber", NID_serialNumber,    1 },
 #ifdef NID_userId
     { "UID",   NID_userId,                 1 },
 #endif