diff options
Diffstat (limited to 'program/include')
| -rw-r--r-- | program/include/rcube_imap.php | 51 |
1 files changed, 32 insertions, 19 deletions
diff --git a/program/include/rcube_imap.php b/program/include/rcube_imap.php index 439c55663..0c365752a 100644 --- a/program/include/rcube_imap.php +++ b/program/include/rcube_imap.php @@ -2416,32 +2416,45 @@ class rcube_imap */ function decode_mime_string($input, $fallback=null) { + // Initialize variable $out = ''; - $pos = strpos($input, '=?'); - if ($pos !== false) - { - // rfc: all line breaks or other characters not found - // in the Base64 Alphabet must be ignored by decoding software - // delete all blanks between MIME-lines, differently we can - // receive unnecessary blanks and broken utf-8 symbols - $input = preg_replace("/\?=\s+=\?/", '?==?', $input); + // Iterate instead of recursing, this way if there are too many values we don't have stack overflows + // rfc: all line breaks or other characters not found + // in the Base64 Alphabet must be ignored by decoding software + // delete all blanks between MIME-lines, differently we can + // receive unnecessary blanks and broken utf-8 symbols + $input = preg_replace("/\?=\s+=\?/", '?==?', $input); - $out = substr($input, 0, $pos); - - $end_cs_pos = strpos($input, "?", $pos+2); - $end_en_pos = strpos($input, "?", $end_cs_pos+1); - $end_pos = strpos($input, "?=", $end_en_pos+1); - - $encstr = substr($input, $pos+2, ($end_pos-$pos-2)); - $rest = substr($input, $end_pos+2); + // Check if there is stuff to decode + if (strpos($input, '=?') !== false) { + // Loop through the string to decode all occurences of =? ?= into the variable $out + while(($pos = strpos($input, '=?')) !== false) { + // Append everything that is before the text to be decoded + $out .= substr($input, 0, $pos); - $out .= rcube_imap::_decode_mime_string_part($encstr); - $out .= rcube_imap::decode_mime_string($rest, $fallback); + // Get the location of the text to decode + $end_cs_pos = strpos($input, "?", $pos+2); + $end_en_pos = strpos($input, "?", $end_cs_pos+1); + $end_pos = strpos($input, "?=", $end_en_pos+1); - return $out; + // Extract the encoded string + $encstr = substr($input, $pos+2, ($end_pos-$pos-2)); + // Extract the remaining string + $input = substr($input, $end_pos+2); + + // Decode the string fragement + $out .= rcube_imap::_decode_mime_string_part($encstr); } + // Deocde the rest (if any) + if (strlen($input) != 0) + $out .= rcube_imap::decode_mime_string($input, $fallback); + + // return the results + return $out; + } + // no encoding information, use fallback return rcube_charset_convert($input, !empty($fallback) ? $fallback : rcmail::get_instance()->config->get('default_charset', 'ISO-8859-1')); |