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Bug #66117 imap_fetchstructure dparameters[0]->value incomplete
Submitted: 2013-11-19 13:01 UTC Modified: 2020-10-25 04:22 UTC
Votes:3
Avg. Score:4.3 ± 0.9
Reproduced:2 of 2 (100.0%)
Same Version:2 (100.0%)
Same OS:0 (0.0%)
From: saygushkin at gmail dot com Assigned: cmb (profile)
Status: No Feedback Package: IMAP related
PHP Version: 5.4.22 OS: Linux
Private report: No CVE-ID: None
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 [2013-11-19 13:01 UTC] saygushkin at gmail dot com
Description:
------------
---
From manual page: http://www.php.net/function.imap-fetchstructure#refsect1-function.imap-fetchstructure-returnvalues
---

I attached to the mail of the file with name "пустой файл.txt".
Filename in dparameters->value is incomplete.
Mail source code:

--------------030200090909050404050001
Content-Type: text/plain; charset="UTF-8";
	name="=?UTF-8?B?0L/Rg9GB0YLQvtC5INGE0LDQudC7LnR4dA==?="
Content-Transfer-Encoding: base64
Content-Disposition: attachment;
	filename*0*="UTF-8''%D0%BF%D1%83%D1%81%D1%82%D0%BE%D0%B9%20%D1%84%D0%B0%D0";
	filename*1*="%B9%D0%BB%2E%74%78%74"

0L/Rg9GB0YLQvtC5INGE0LDQudC7Cg==

--------------030200090909050404050001--

Test script:
---------------
$imapStream = imap_open($imapPath, $login, $password);

$mailIds = imap_search($imapStream, 'ALL', SE_UID);

$mailId = array_shift(mailIds);

$mailStructure = imap_fetchstructure($imapStream, $mailId, FT_UID);

var_dump($mailStructure);
var_dump($mailStructure->parts[1]->dparameters[0]->value);
var_dump(urldecode('%D0%BF%D1%83%D1%81%D1%82%D0%BE%D0%B9%20%D1%84%D0%B0%D0'));

Expected result:
----------------
["dparameters"]=>
array(1) {
  [0]=>
  object(stdClass)#724 (2) {
    ["attribute"]=>
    string(8) "filename"
    ["value"]=>
    string(61) "UTF-8''%D0%BF%D1%83%D1%81%D1%82%D0%BE%D0%B9%20%D1%84%D0%B0%D0"
  }
}
["ifparameters"]=>
int(1)
["parameters"]=>
array(2) {
  [0]=>
  object(stdClass)#725 (2) {
    ["attribute"]=>
    string(7) "charset"
    ["value"]=>
    string(5) "UTF-8"
  }
  [1]=>
  object(stdClass)#726 (2) {
    ["attribute"]=>
    string(4) "name"
    ["value"]=>
    string(48) "=?UTF-8?B?0L/Rg9GB0YLQvtC5INGE0LDQudC7LnR4dA==?="
  }
}

string(61) "UTF-8''%D0%BF%D1%83%D1%81%D1%82%D0%BE%D0%B9%20%D1%84%D0%B0%D0"
string(18) "пустой фа�"

Actual result:
--------------
["dparameters"]=>
array(1) {
  [0]=>
  object(stdClass)#724 (2) {
    ["attribute"]=>
    string(8) "filename"
    ["value"]=>
    string(61) "UTF-8''%D0%BF%D1%83%D1%81%D1%82%D0%BE%D0%B9%20%D1%84%D0%B0%D0%B9%D0%BB%2E%74%78%74"
  }
}
["ifparameters"]=>
int(1)
["parameters"]=>
array(2) {
  [0]=>
  object(stdClass)#725 (2) {
    ["attribute"]=>
    string(7) "charset"
    ["value"]=>
    string(5) "UTF-8"
  }
  [1]=>
  object(stdClass)#726 (2) {
    ["attribute"]=>
    string(4) "name"
    ["value"]=>
    string(48) "=?UTF-8?B?0L/Rg9GB0YLQvtC5INGE0LDQudC7LnR4dA==?="
  }
}

string(61) "UTF-8''%D0%BF%D1%83%D1%81%D1%82%D0%BE%D0%B9%20%D1%84%D0%B0%D0%B9%D0%BB%2E%74%78%74"
string(25) "пустой файл.txt"

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 [2013-11-19 13:05 UTC] saygushkin at gmail dot com
-Summary: CentOS release 6.2 (Final) +Summary: imap_fetchstructure dparameters[0]->value incomplete
 [2013-11-19 13:05 UTC] saygushkin at gmail dot com
fix summary
 [2013-11-19 19:21 UTC] requinix@php.net
Expected and actual outputs are backwards.

The relevant RFC is #2231: "MIME Parameter Value and Encoded Word Extensions: Character Sets, Languages, and Continuations"
http://tools.ietf.org/html/rfc2231

tl;dr: the filename would be interpreted as coming in multiple parts (because of the *Ns) and contains charset info (because of the trailing *s), and the value is decoded as UTF-8 (raw value is formatted as charset'language'value).
 [2020-10-16 14:27 UTC] cmb@php.net
-Status: Open +Status: Feedback -Assigned To: +Assigned To: cmb
 [2020-10-16 14:27 UTC] cmb@php.net
Based on requinix' comment, it's pretty clear what happens: the
continuation is ignored.  I can, however, not reproduce the
reported behavior.
 [2020-10-25 04:22 UTC] php-bugs at lists dot php dot net
No feedback was provided. The bug is being suspended because
we assume that you are no longer experiencing the problem.
If this is not the case and you are able to provide the
information that was requested earlier, please do so and
change the status of the bug back to "Re-Opened". Thank you.
 
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Last updated: Wed Oct 28 09:01:28 2020 UTC