NAME
crypt - password encoding
SYNOPSIS
mov $key,r0
jsr pc,crypt
char *crypt(key)
char *key;
DESCRIPTION
On entry, r0 points to a string of characters terminated by
an ASCII NUL. The routine performs an operation on the key
which is difficult to invert (i.e. encrypts it) and leaves
the resulting eight bytes of ASCII alphanumerics in a global
cell called ``word''.
From C, the key argument is a string and the value returned
is a pointer to the eight-character result.
This routine is used to encrypt all passwords.
SEE ALSO
passwd(I), passwd(V), login(I)
BUGS
Short or otherwise simple passwords can be decrypted easily
by exhaustive search. Six characters of gibberish is rea-
sonably safe.
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