[pgpool-hackers: 3538] Re: [Proposal] Support LDAP Authentication

[Takuma Hoshiai]

I created and attached a patch which support LDAP authentication between client and Pgpool-II.

LDAP authentication can operate in two modes(simple bind mode and search and bind
mode), auth options is set by pool_hba.conf.  These are the same as PostgreSQL LDAP
authentication.

LDAP authentication require a password input from client. It is not used for 
authentication between Pgpool-II and PostgreSQL by default, because LDAP and PostgreSQL
may have different passwords. If LDAP authentication password is the same as PostgreSQL,
we can reuse it for authentication between Pgpool-II and PostgreSQL by setting
backend_use_password to 1 in auth-options.

If you test a this patch, you should need automake and autoconf because this patch
edited configure.ac .

for example:
 $ autoheader
 $ aclocal
 $ automake -a -c
 $ autoconf

Comments and suggestions are welcome.

-- 
Takuma Hoshiai <hoshiai at sraoss.co.jp>
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