mirror of
https://git.postgresql.org/git/postgresql.git
synced 2024-09-29 15:22:16 +02:00
85 lines
2.0 KiB
Plaintext
85 lines
2.0 KiB
Plaintext
|
<sect1 id="chkpass">
|
||
|
|
<title>chkpass</title>
|
||
|
|
|
||
|
|
<!--
|
||
|
|
<indexterm zone="chkpass">
|
||
|
|
<primary>chkpass</primary>
|
||
|
|
</indexterm>
|
||
|
|
-->
|
||
|
|
<para>
|
||
|
|
chkpass is a password type that is automatically checked and converted upon
|
||
|
|
entry. It is stored encrypted. To compare, simply compare against 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.
|
||
|
|
</para>
|
||
|
|
|
||
|
|
<para>
|
||
|
|
Note that the chkpass data type is not indexable.
|
||
|
|
<!--
|
||
|
|
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.
|
||
|
|
-->
|
||
|
|
</para>
|
||
|
|
|
||
|
|
<para>
|
||
|
|
If you precede the string with a colon, the encryption and checking are
|
||
|
|
skipped so that you can enter existing passwords into the field.
|
||
|
|
</para>
|
||
|
|
|
||
|
|
<para>
|
||
|
|
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.
|
||
|
|
</para>
|
||
|
|
|
||
|
|
<para>
|
||
|
|
The encryption uses the standard Unix function crypt(), and so it suffers
|
||
|
|
from all the usual limitations of that function; notably that only the
|
||
|
|
first eight characters of a password are considered.
|
||
|
|
</para>
|
||
|
|
|
||
|
|
<para>
|
||
|
|
Here is some sample usage:
|
||
|
|
</para>
|
||
|
|
|
||
|
|
<programlisting>
|
||
|
|
test=# create table test (p chkpass);
|
||
|
|
CREATE TABLE
|
||
|
|
test=# insert into test values ('hello');
|
||
|
|
INSERT 0 1
|
||
|
|
test=# select * from test;
|
||
|
|
p
|
||
|
|
----------------
|
||
|
|
:dVGkpXdOrE3ko
|
||
|
|
(1 row)
|
||
|
|
|
||
|
|
test=# select raw(p) from test;
|
||
|
|
raw
|
||
|
|
---------------
|
||
|
|
dVGkpXdOrE3ko
|
||
|
|
(1 row)
|
||
|
|
|
||
|
|
test=# select p = 'hello' from test;
|
||
|
|
?column?
|
||
|
|
----------
|
||
|
|
t
|
||
|
|
(1 row)
|
||
|
|
|
||
|
|
test=# select p = 'goodbye' from test;
|
||
|
|
?column?
|
||
|
|
----------
|
||
|
|
f
|
||
|
|
(1 row)
|
||
|
|
</programlisting>
|
||
|
|
|
||
|
|
<sect2>
|
||
|
|
<title>Author</title>
|
||
|
|
<para>
|
||
|
|
D'Arcy J.M. Cain <email>darcy@druid.net</email>
|
||
|
|
</para>
|
||
|
|
</sect2>
|
||
|
|
</sect1>
|
||
|
|
|