Bug #51250 [Opn->Csd]: iconv_mime_decode() does not ignore malformed Q-encoded words
Edit report at http://bugs.php.net/bug.php?id=51250&edit=1
ID: 51250
Updated by: iliaa@php.net
Reported by: tomlove at gmail dot com
Summary: iconv_mime_decode() does not ignore malformed
Q-encoded words
-Status: Open
+Status: Closed
Type: Bug
Package: ICONV related
Operating System: Linux / Windows
PHP Version: 5.2.13
-Assigned To:
+Assigned To: iliaa
Block user comment: N
Private report: N
New Comment:
This bug has been fixed in SVN.
Snapshots of the sources are packaged every three hours; this change
will be in the next snapshot. You can grab the snapshot at
http://snaps.php.net/.
Thank you for the report, and for helping us make PHP better.
Previous Comments:
------------------------------------------------------------------------
[2010-03-19 12:30:57] tomlove at gmail dot com
Correction - this sentence: "Accordingly, B-encoded encoded-words (as
per RFC
2047) are silently ignored" should read "Accordingly, MALFORMED
B-encoded
encoded-words are silently ignored"
------------------------------------------------------------------------
[2010-03-09 20:49:43] tomlove at gmail dot com
Description:
------------
When calling iconv_mime_decode() with $mode =
ICONV_MIME_DECODE_CONTINUE_ON_ERROR,
the manual states that "iconv_mime_decode_headers() attempts to ignore
any
grammatical errors and continue to process a given header."
Accordingly, B-encoded encoded-words (as per RFC 2047) are silently
ignored.
But when using Q (quoted-printable) encoding, encoded-words with illegal
characters (> 127) cause iconv_mime_decode() to return false as if
ICONV_MIME_DECODE_CONTINUE_ON_ERROR was not specified.
As such it is not resilient towards malformed headers.
Test script:
---------------
$m = ICONV_MIME_DECODE_CONTINUE_ON_ERROR;
var_dump(iconv_mime_decode("Legal encoded-word: =?utf-8?B?Kg==?= .",
$m));
var_dump(iconv_mime_decode("Legal encoded-word: =?utf-8?Q?*?= .", $m));
var_dump(iconv_mime_decode("Illegal encoded-word:
=?utf-8?B?".chr(0xA1)."?= .", $m));
var_dump(iconv_mime_decode("Illegal encoded-word:
=?utf-8?Q?".chr(0xA1)."?= .", $m));
Expected result:
----------------
string(23) "Legal encoded-word: * ."
string(23) "Legal encoded-word: * ."
string(24) "Illegal encoded-word: ."
string(24) "Illegal encoded-word: ."
Actual result:
--------------
string(23) "Legal encoded-word: * ."
string(23) "Legal encoded-word: * ."
string(24) "Illegal encoded-word: ."
bool(false)
------------------------------------------------------------------------
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Edit this bug report at http://bugs.php.net/bug.php?id=51250&edit=1
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