#pam_krb5+ldap

Patch to extend the pam_krb5 compile options and functionality

Assists with UID/GID mapping for users that are not stored locally, but within an LDAP directory. Supports RFC2307 POSIX account schema attributes for uid, gid, homeDirectory, and defaultShell.

##Installation:

###This patch Pull down the latest patch first

git clone https://github.com:jas-/pam_krb5-ldap.git

###pam_krb5 Pull down the latest pam_krb5 git repo like so:

git clone https://git.fedorahosted.org/pam_krb5.git

###Apply the patch Now apply the patch

patch -p0 > latest-pam_krb5+ldap.patch

###Build Build necessary tools for build

./autogen

###Configure In order to enable this functionality simply run the configure command with the --with-ldap argument like so.

./configure --with-ldap

###Install Install the authentication module

make install

If you do not see the "WITH_LDAP" flag during compile of the source files you may need to force the param like so.

make CFLAGS="-DWITH_LDAP" install

##Configuration You will now need to configure the /etc/krb5.conf & the PAM service files to enable the pam_krb5.so authentication module.

/etc/pam_krb5.conf

Add LDAP specific data to /etc/krb5.conf appdefaults section.

####Options

• schema: Available options are ad or ldap (use ad for Microsoft Active Directory & ldap for OpenLDAP)
• ldapservs: A space separated list of Active Directory or OpenLDAP servers hostnames (FQDN)
• ldapport: The Active Directory or OpenLDAP port assignment (default is 389)
• binddn: The bind DN for the read only account
• basedn: The OU with which is a base for account lookups
• ldapuser: The username to bind with (should be a limited privilege account)
• ldappass: The password to bind with
• passwd: The passwd file (default is /etc/passwd)
• shadow: The shadow file (default is /etc/shadow, NO PASSWORDS GET ENTERED HERE)
• group: The group file (default is /etc/group)
• groups: A comma separated list of groups the authenticated user should be added to
• homedir: If defined will overwrite the entry from Active Directory/OpenLDAP
• defshell: If defined will overwrite the entry from Active Directory/OpenLDAP

####Example An example is listed here:

[appdefaults]
pam = {
        ticket_lifetime = 1d
        renew_lifetime = 1d
        forwardable = true
        proxiable = false
        retain_after_close = false
        minimum_uid = 2
        try_first_pass = true
        ignore_root = true

        schema = ad #ad | ldap to meet your requirements
        ldapservs = ad.domain.com ldap.domain.com
        ldapport = 389
        binddn = uid=read-only-user,ou=Users,dc=ldap,dc=domain,dc=com
        basedn = ou=campus,dc=ad,dc=domain,dc=com
        ldapuser = [readonly-username]
        ldappass = [readonly-password]
        
        passwd = /etc/passwd
        shadow = /etc/shadow

	# If you wish to add the user to groups
	# a comma separted list should be used
	group = /etc/group
	groups = audio,cdrom,cdrw,usb,plugdev,video,games

        # If you define these they will
        # over write anything obtained from
        # ldap/active directory
        #homedir = /home
        #defshell = /bin/bash
}

/etc/pam.d/

Now you will want to add the pam_krb5 module to your authentication stack per the service you wish to enable this authentication for.

Example

auth            required        pam_env.so
auth            sufficient      pam_krb5.so
auth            sufficient      pam_unix.so try_first_pass likeauth nullok
auth            required        pam_deny.so

account         required        pam_unix.so

password        required        pam_cracklib.so difok=2 minlen=8 dcredit=2 ocredit=2 retry=3
password        sufficient      pam_krb5.so
password        sufficient      pam_unix.so try_first_pass use_authtok nullok sha512 shadow
password        required        pam_deny.so

session         required        pam_limits.so
session         required        pam_env.so
session         optional        pam_krb5.so
session         required        pam_unix.so

##Errors If you are still unable to authenticate your users you may enable the debug option like so

auth	optional	pam_krb5.so debug

Please report any bugs to @ https://github.com/jas-/pam_krb5-ldap/issues