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Initial checkin of a contributed type that handles passwords efficiently.

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D'Arcy J.M. Cain
2001-05-03 12:32:13 +00:00
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$Header: /cvsroot/pgsql/contrib/chkpass/Attic/README.chkpass,v 1.1 2001/05/03 12:32:13 darcy Exp $
Chkpass is a password type that is automatically checked and converted upon
entry. It is stored encrypted. To compare, simply compare agains a clear
text password and the comparison function will encrypt it before comparing.
It also returns an error if the code determines that the password is easily
crackable. This is currently a stub that does nothing.
I haven't worried about making this type indexable. I doubt that anyone
would ever need to sort a file in order of encrypted password.
If you precede the string with a colon, the encryption and checking are
skipped so that you can enter existing passwords into the field.
On output, a colon is prepended. This makes it possible to dump and reload
passwords without re-encrypting them. If you want the password (encrypted)
without the colon then use the raw() function. This allows you to use the
type with things like Apache's Auth_PostgreSQL module.
D'Arcy J.M. Cain
darcy@druid.net