DNS INWX Problem

[KevinGully]

Steps to reproduce

acme.sh --issue -d mydomain.com --dns dns_inwx
results in "invalid domain" "Error add txt for domain:_acme-challenge.mydomain.com"

What I found out:
The Problem appears in dns_inwx.sh

acme.sh/dnsapi/dns_inwx.sh

Lines 253 to 299 in 0da839c

	_get_root() {
	domain=$1
	_debug "get root"
	domain=$1
	i=2
	p=1
	xml_content='<?xml version="1.0" encoding="UTF-8"?>
	<methodCall>
	<methodName>nameserver.list</methodName>
	<params>
	<param>
	<value>
	<struct>
	<member>
	<name>pagelimit</name>
	<value>
	<int>9999</int>
	</value>
	</member>
	</struct>
	</value>
	</param>
	</params>
	</methodCall>'
	response="$(_post "$xml_content" "$INWX_Api" "" "POST")"
	while true; do
	h=$(printf "%s" "$domain" | cut -d . -f $i-100)
	_debug h "$h"
	if [ -z "$h" ]; then
	#not valid
	return 1
	fi
	if _contains "$response" "$h"; then
	_sub_domain=$(printf "%s" "$domain" | cut -d . -f 1-$p)
	_domain="$h"
	return 0
	fi
	p=$i
	i=$(_math "$i" + 1)
	done
	return 1
	}

The response in the Method get_root() at line 280 looks like this:
Error Code 2002 "Command use error"
But I don't know what's wrong.
3 Month ago everything was fine.
INWX API Doc

<?xml version="1.0" encoding="UTF-8"?>
<methodResponse>
  <params>
    <param>
      <value>
        <struct>
          <member>
            <name>code</name>
            <value>
              <int>2002</int>
            </value>
          </member>
          <member>
            <name>msg</name>
            <value>
              <string>Command use error</string>
            </value>
          </member>
          <member>
            <name>svTRID</name>
            <value>
              <string>20230831-2893536221</string>
            </value>
          </member>
          <member>
            <name>runtime</name>
            <value>
              <double>0.001400</double>
            </value>
          </member>
        </struct>
      </value>
    </param>
  </params>
</methodResponse>

[github-actions]

Please upgrade to the latest code and try again first. Maybe it's already fixed. acme.sh --upgrade If it's still not working, please provide the log with --debug 2, otherwise, nobody can help you.

[KevinGully]

The Problem was found by @bekanne:

I found the problem in the dns_inwx.sh script. The cookie string cannot be saved because INWX changed a header key to lower case. This string is needed to stay authenticated for all further requests to the INWX API.

Solution:
In the dns_inwx.sh script the cookie string getting from a header value is being saved in a variable. The check for the header key should be case insensitive. This can be done by adding `-i`to the grep function:
https://github.com/acmesh-official/acme.sh/blob/0da839cce35f4ab014a6d62133fac03c8f4c6979/dnsapi/dns_inwx.sh#L197

So the line should be look like this:
`INWX_Cookie=$(printf "Cookie: %s" "$(grep "domrobot=" "$HTTP_HEADER" | grep -i "^Set-Cookie:" | _tail_n 1 | _egrep_o 'domrobot=[^;]*;' | tr -d ';')")`

@Kulturserver you can also use this as workaround by editing the .acme.sh/dnsapi/dns_inwx.sh file.

Originally posted by @bekanne in #4763 (comment)

And the INWX Dev also replied:

Hey there,

we just wanted to report this issue.

While header fields always were case-insensitive our infrastructure used "Set-Cookie" in its responses.
Last week we enabled HTTP/2 on our API. HTTP/2 does not allow uppercase characters in header fields anymore.

https://datatracker.ietf.org/doc/html/rfc9113#section-8.2.1

Best regards

Originally posted by @inwx-developer in #4763 (comment)