Bug #51250 [Opn]: 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 User updated by: tomlove at gmail dot com Reported by: tomlove at gmail dot com Summary: iconv_mime_decode() does not ignore malformed Q-encoded words Status: Open Type: Bug Package: ICONV related Operating System: Linux / Windows PHP Version: 5.2.13 New Comment: 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" Previous Comments: ------------------------------------------------------------------------ [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) ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/bug.php?id=51250&edit=1