A replacement for the old unix crypt(1) command. Mcrypt uses the
following encryption (block) algorithms: BLOWFISH, DES, TripleDES,
3-WAY, SAFER-SK64, SAFER-SK128, CAST-128, RC2 TEA (extended), TWOFISH,
RC6, IDEA, and GOST. The Unix crypt algorithm is also included to allow
compatibility with the crypt(1) command. CBC, ECB, OFB, and CFB modes
of encryption are supported.