An OpenSSL-compatible implementation of the RSA Data Security, Inc. MD4 Message-Digest Algorithm.

Used in Qt Core (QCryptographicHash). Configure with -DQT_CRYPTOGRAPHICHASH_ONLY_SHA1 to avoid.

The sources can be found in doc/src/qtcoreattributions.

Written by Alexander Peslyak - better known as Solar Designer <solar@openwall.com> - in 2001, and placed in the public domain. There's absolutely no warranty.

Public Domain.

Available under certain Qt licenses.
Find out more.