[users@httpd] REMOTE_USER is not available at the time of external function call in httpd RewriteMap

[Chudamani Padhan]

Hi,
I am trying to set HTTP basic auth header for an user which is already
authenticated by external application. For doing that, we have to set
base64 encoded of "username:dummy"  where password is any dummy value.  In
ssl config, REMOTE_USER is getting captured properly in RequestHeader(Line
5) but not in RewriteRule (Line 3).  In line 3, I tried with REMOTE_USER,
LA-U:REMOTE_USER, HTTP:REMOTE_USER. But all these variables are null. Am I
missing any config here?


ssl.conf

Line 1- RewriteEngine on
Line 2- RewriteMap base64map "prg:/opt/scripts/base64.pl"
Line 3- RewriteRule .* -
[E=AUTHN:${base64map:%{LA-U:REMOTE_USER}:%{LA-U:REMOTE_USER}},NE]
Line 4- RequestHeader set Authorization "Basic %{AUTHN}e"

Line 5- RequestHeader set X-Remote-User2 %{REMOTE_USER}s

Thanks,
Chudamani