Problem with amazonaws.com

[UnveilTech]

Hi,
is that normal that none of amazonaws.com hosts are found ?
ex: kinesis.us-east-1.amazonaws.com
each time it gives NULL

bye Fred

[Pascal76]

same issue (s3.amazonaws.com) :(

• Deprecated: strlen(): Passing null to parameter nb 1 ($string) of type string is deprecated in <...>/registered-domain-libs/regDomain.class.php on line 69
• I have to strtolower the domain before ... is it expected ?(try on Rfitvintage.com)

(on php 8.1)

[usrflo]

@UnveilTech : I tried all 3 implementations with kinesis.us-east-1.amazonaws.com and the results look good to me:

registered-domain-libs/PHP $ php test-regDomain.php kinesis.us-east-1.amazonaws.com
kinesis.us-east-1.amazonaws.com
registered-domain-libs/PHP $ php test-regDomain.php test.kinesis.us-east-1.amazonaws.com
kinesis.us-east-1.amazonaws.com

registered-domain-libs/Perl $ perl -I. test-regDomain.pl kinesis.us-east-1.amazonaws.com
kinesis.us-east-1.amazonaws.com
registered-domain-libs/Perl $ perl -I. test-regDomain.pl test.kinesis.us-east-1.amazonaws.com
kinesis.us-east-1.amazonaws.com

registered-domain-libs/C $ ./test-regdom kinesis.us-east-1.amazonaws.com
kinesis.us-east-1.amazonaws.com: kinesis.us-east-1.amazonaws.com
registered-domain-libs/C $ ./test-regdom test.kinesis.us-east-1.amazonaws.com
test.kinesis.us-east-1.amazonaws.com: kinesis.us-east-1.amazonaws.com

What exactly fails with NULL?

(on PHP 8.1.2 and perl 5, version 34)

[usrflo]

same issue (s3.amazonaws.com) :(

@Pascal76: as s3.amazonaws.com is listed in https://publicsuffix.org/list/public_suffix_list.dat and is considered to be a public suffix according to the definition at https://publicsuffix.org/ : 'A "public suffix" is one under which Internet users can (or historically could) directly register names'.

This regdom-lib allows to detect registered domain names equal to the subdomain below a public suffix.
Because of the list record s3.amazonaws.com you get as a result:

• s3.amazonaws.com is no registered domain
• sub.s3.amazonaws.com could be a registered domain

Looking at the request of an Amazon employee in publicsuffix/list#105 to add s3.amazonaws.com to the public suffix list I think Amazon may have had a different requirement: as you can see at https://publicsuffix.org/learn/ in section "Uses" browsers e.g. restrict cookie settings with these public suffixes. It may be Amazon tried to force some restrictions with their detailed list of suffixes. And this may break the detection of the registered domain that in my view should be amazonaws.com in case of s3.amazonaws.com.

@lawells: you were the one that requested publicsuffix/list#105 back in 2016. Could you please clarify why Amazon had the need to have these detailed *.amazonaws.com public suffixes published?

[Pascal76]

public function validDomainPart($domPart) {
// see http://www.register.com/domain-extension-rules.rcmx
$len = strlen($domPart);

There should be a check to avoid NULL for $domPart

[usrflo]

There should be a check to avoid NULL for $domPart

I just added it in ee64e44

[UnveilTech]

Hi,

$szDom is NULL, it should be "amazonaws.com"

bye Fred

[UnveilTech]

$szHost = "kinesis.us-east-1.amazonaws.com";
$szDom = getRegisteredDomain($szHost);

[usrflo]

$szDom is NULL, it should be "amazonaws.com"

$szDom is "kinesis.us-east-1.amazonaws.com" according to the explanation in #16 (comment).

Maybe it would be more precise to differ between
a) registered domain like amazonaws.com or dyndns.org
b) domain that can be used to restrict cookie settings for. Otherwise sites at *.amazonaws.com or *.dyndns.org could all collide/access cookies at amazonaws.com/dyndns.org

What's your use-case for getRegisteredDomain(...) ?

[UnveilTech]

What's your use-case for getRegisteredDomain(...) ?

$szDom = getRegisteredDomain("kinesis.us-east-1.amazonaws.com");
result is NULL for $szDom

[usrflo]

Are you sure you're using the latest implementation?

$registeredDomain = getRegisteredDomain("kinesis.us-east-1.amazonaws.com", $tldTree);
--> the result in $registeredDomain is "kinesis.us-east-1.amazonaws.com"

[UnveilTech]

Hi,
latest implementation does not return NULL anymore, that's good.
but it should return the master domain "amazonaws.com" instead of "kinesis.us-east-1.amazonaws.com", no ?

bye Fred

[usrflo]

but it should return the master domain "amazonaws.com" instead of "kinesis.us-east-1.amazonaws.com", no ?

@UnveilTech : yes, sure. Can you confirm that my explanation for this issue in #16 (comment) makes the problem clear?