Return to makekey.8 CVS log

Up to [Power 6/32 Unix Tahoe 4.2BSD] / cci / usr / src / man / man8

Annotation of cci/usr/src/man/man8/makekey.8, revision 1.1.1.1

1.1       root        1: .TH MAKEKEY 8 "4 February 1983"
                      2: .SH NAME
                      3: makekey \- generate encryption key
                      4: .SH SYNOPSIS
                      5: .B /usr/lib/makekey
                      6: .SH DESCRIPTION
                      7: .I Makekey
                      8: improves the usefulness of encryption schemes depending on a key by
                      9: increasing the amount of time required to search the key space.  It
                     10: reads 10 bytes from its standard input, and writes 13 bytes on its
                     11: standard output.  The output depends on the input in a way intended to
                     12: be difficult to compute (that is, to require a substantial fraction of
                     13: a second).
                     14: .PP
                     15: The first eight input bytes
                     16: (the
                     17: .IR "input key" )
                     18: can be arbitrary ASCII characters.
                     19: The last two (the
                     20: .IR salt )
                     21: are best chosen from the set of digits, upper- and lower-case
                     22: letters, and `.' and `/'.
                     23: The salt characters are repeated as the first two characters of the output.
                     24: The remaining 11 output characters are chosen from the same set as the salt
                     25: and constitute the
                     26: .I "output key."
                     27: .PP
                     28: The transformation performed is essentially the following:
                     29: the salt is used to select one of 4096 cryptographic
                     30: machines all based on the National Bureau of Standards
                     31: DES algorithm, but modified in 4096 different ways.
                     32: Using the input key as key,
                     33: a constant string is fed into the machine and recirculated a number of times.
                     34: The 64 bits that come out are distributed into the
                     35: 66 useful key bits in the result.
                     36: .PP
                     37: .I Makekey
                     38: is intended for programs that perform encryption (for instance,
                     39: .I ed
                     40: and
                     41: .IR crypt (1)).
                     42: Usually makekey's input and output will be pipes.
                     43: .SH SEE ALSO
                     44: crypt(1), ed(1)

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.