Internal Program Version:  libmcrypt 2.5.8  (The HEADER-Files)

Libmcrypt  is a data encryption library.  The library is thread safe
and provides encryption and decryption functions. This version of the
library supports many encryption algorithms and encryption modes.
Supported algorithms include SERPENT, RIJNDAEL, 3DES, GOST, SAFER+,
CAST-256, RC2, XTEA, 3WAY, TWOFISH, BLOWFISH, ARC. FOUR, and WAKE.

http://sourceforge.net/projects/mcrypt