makekey - generate encryption key
The first eight input bytes (the "input key") can be arbitrary ASCII characters. The last two (the salt) are best chosen from the set of digits, uppercase and lowercase letters, the period (.), and the slash (/). The salt characters are repeated as the first two characters of the output. The remaining 11 output characters are chosen from the same set as the salt and constitute the "output key".
The transformation performed is essentially the following: the salt is used to select one of 4096 cryptographic machines all based on the National Bureau of Standards DES algorithm, but modified in 4096 different ways. Using the input key as key, a constant string is fed into the machine and recirculated a number of times. The 64 bits that come out are distributed into the 66 useful key bits in the result.
The command is intended for programs that perform encryption (for instance, Usually input and output for are pipes.
Commands: crypt(1), ed(1), ex(1), vi(1) delim off