MD5 message-digest algorithm.
Used in Qt Core ( QCryptographicHash ). Configure with -DQT_CRYPTOGRAPHICHASH_ONLY_SHA1 to avoid.
The sources can be found in tqtc-qt5/qtbase/src/3rdparty/md5.
Written by Colin Plumb in 1993, no copyright is claimed. Ian Jackson <ian@chiark.greenend.org.uk>.
公共领域。