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makekey(1) [opensolaris man page]

makekey(1)							   User Commands							makekey(1)

makekey - generate encryption key SYNOPSIS
/usr/lib/makekey DESCRIPTION
makekey improves the usefulness of encryption schemes that depend on a key by increasing the amount of time required to search the key space. It attempts to read 8 bytes for its key (the first eight input bytes), then it attempts to read 2 bytes for its salt (the last two input bytes). The output depends on the input in a way intended to be difficult to compute (that is, to require a substantial fraction of a second). 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 dig- its, ., /, upper- and lower-case letters. The salt characters are repeated as the first two characters of the output. The remaining 11 out- put 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 4,096 cryptographic machines all based on the National Bureau of Standards DES algorithm, but broken in 4,096 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 output key bits in the result. makekey is intended for programs that perform encryption. Usually, its input and output will be pipes. SEE ALSO
ed(1), vi(1), passwd(4) NOTES
makekey can produce different results depending upon whether the input is typed at the terminal or redirected from a file. SunOS 5.11 3 Mar 2008 makekey(1)

Check Out this Related Man Page

CRYPT(3)						     Library Functions Manual							  CRYPT(3)

crypt, setkey, encrypt - DES encryption SYNOPSIS
char *crypt(key, salt) char *key, *salt; setkey(key) char *key; encrypt(block, edflag) char *block; DESCRIPTION
Crypt is the password encryption routine. It is based on the NBS Data Encryption Standard, with variations intended (among other things) to frustrate use of hardware implementations of the DES for key search. The first argument to crypt is a user's typed password. The second is a 2-character string chosen from the set [a-zA-Z0-9./]. The salt string is used to perturb the DES algorithm in one of 4096 different ways, after which the password is used as the key to encrypt repeat- edly a constant string. The returned value points to the encrypted password, in the same alphabet as the salt. The first two characters are the salt itself. The other entries provide (rather primitive) access to the actual DES algorithm. The argument of setkey is a character array of length 64 containing only the characters with numerical value 0 and 1. If this string is divided into groups of 8, the low-order bit in each group is ignored, leading to a 56-bit key which is set into the machine. The argument to the encrypt entry is likewise a character array of length 64 containing 0's and 1's. The argument array is modified in place to a similar array representing the bits of the argument after having been subjected to the DES algorithm using the key set by setkey. If edflag is 0, the argument is encrypted; if non-zero, it is decrypted. SEE ALSO
passwd(1), passwd(5), login(1), getpass(3) BUGS
The return value points to static data whose content is overwritten by each call. CRYPT(3)
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