Re: [EXT] Re: Problems to use LDAP again AD directory with disabledanonymous logon - Mailing list pgadmin-support

Hi

I did as advised and get now this as response in UI 
{"success":0,"errormsg":"attribute type not present","info":"","result":null,"data":null}
and here the error stack

2020-05-06 04:57:59,908: ERROR
flask.app: attribute type not present
Traceback (most recent call last):
  File "/usr/local/lib/python3.7/site-packages/flask/app.py", line 1813, in full_dispatch_request
    rv = self.dispatch_request()
  File "/usr/local/lib/python3.7/site-packages/flask/app.py", line 1799, in dispatch_request
    return self.view_functions[rule.endpoint](**req.view_args)
  File "/pgadmin4/pgadmin/authenticate/__init__.py", line 54, in login
    status, msg = auth_obj.authenticate()
  File "/pgadmin4/pgadmin/authenticate/__init__.py", line 117, in authenticate
    status, msg = source.authenticate(self.form)
  File "/pgadmin4/pgadmin/authenticate/ldap.py", line 49, in authenticate
    status, user_email = self.search_ldap_user()
  File "/pgadmin4/pgadmin/authenticate/ldap.py", line 170, in search_ldap_user
    attributes=ALL_ATTRIBUTES
  File "/usr/local/lib/python3.7/site-packages/ldap3/core/connection.py", line 765, in search
    search_base = safe_dn(search_base)
  File "/usr/local/lib/python3.7/site-packages/ldap3/utils/dn.py", line 353, in safe_dn
    for component in parse_dn(dn, escape=True):
  File "/usr/local/lib/python3.7/site-packages/ldap3/utils/dn.py", line 315, in parse_dn
    if not _validate_attribute_type(attribute_type):
  File "/usr/local/lib/python3.7/site-packages/ldap3/utils/dn.py", line 172, in _validate_attribute_type
    raise LDAPInvalidDnError('attribute type not present')
ldap3.core.exceptions.LDAPInvalidDnError: attribute type not present

Also one question:
The user that will logon in our should be heiko.onnebrink@metronom.com, the user SVCLDAP is not used to work with
pgAdmin.. so should the config not be swapped between these users ?
 

cheers
Heiko

From: Khushboo Vashi <khushboo.vashi@enterprisedb.com>
Date: Wednesday, 6. May 2020 at 06:42
To: "Onnebrink, Heiko" <heiko.onnebrink@metronom.com>
Cc: "pgadmin-support lists.postgresql.org" <pgadmin-support@lists.postgresql.org>
Subject: [EXT] Re: Problems to use LDAP again AD directory with disabled anonymous logon

Hi,

On Wed, May 6, 2020 at 12:57 AM <mailto:heiko.onnebrink@metronom.com> wrote:
Hi
I am exited to see that with the latest patch we have LDAP support in pgAdmin
I tried to make it work but did not succeed. 

We use Microsoft AD. We have a global catalog that allows LDAP access but anonymous access is disabled.

I have a technical user SVCLDAP that I can use to auth against LDAP and search for a user via UPN and did some
ldapsearchtests before I changed the config of pgAdmin:
 

ldapsearch -H ldap://http://ldap.mgi.de:389 -D "CN=SVCLDAP, CN=Users, DC=ASF, DC=madm, DC=net" -W  -b "dc=R2,
dc=madm,dc=net""(userPrincipalName=mailto:heiko.onnebrink@metronom.com)"
 
Enter LDAP Password: somepwd

# extended LDIF
#
# LDAPv3
# base <dc=madm,dc=net> with scope subtree
# filter: (userPrincipalName=mailto:heiko.onnebrink@metronom.com)
# requesting: ALL
#

# Onnebrink Heiko, HQ01-DUS, Users, DE, MSYS, http://r2.madm.net
dn: CN=Onnebrink Heiko,OU=HQ01-DUS,OU=Users,OU=DE,OU=MSYS,DC=r2,DC=madm,DC=net
..

If I do the same query without providing a bind DN gives an sasl error

ldapsearch -H ldap://http://ldap.mgi.de:389 -b "dc=R2, dc=madm,dc=net"
"(userPrincipalName=mailto:heiko.onnebrink@metronom.com)"


SASL/GSSAPI authentication started
ldap_sasl_interactive_bind_s: Local error (-2)
additional info: SASL(-1): generic failure: GSSAPI Error: Unspecified GSS failure.  Minor code may provide more
information(No Kerberos credentials available (default cache: FILE:/tmp/krb5cc_500))
 


If I disable SASL (-x) it works but returns no data:

ldapsearch -H ldap://http://ldap.mgi.de:389 -x  -b "dc=R2, dc=madm,dc=net"
"(userPrincipalName=mailto:heiko.onnebrink@metronom.com)"
# extended LDIF
#
# LDAPv3
# base <dc=R2, dc=madm,dc=net> with scope subtree
# filter: (userPrincipalName=mailto:heiko.onnebrink@metronom.com)
# requesting: ALL
#

# search result
search: 2
result: 0 Success

# numResponses: 1

I transferred now the above settings to the pgAdmin config (docker is used here)

docker run -p 443:443 --name pgadminssl -e 'PGADMIN_CONFIG_LDAP_SERVER_URI="ldap://http://ldap.mgi.de:389"'  -e
'PGADMIN_CONFIG_LDAP_USERNAME_ATTRIBUTE="userPrincipalName"'-e 'PGADMIN_CONFIG_LDAP_BASE_DN="(dc=madm,dc=net)"' -e
'PGADMIN_CONFIG_SEARCH_SCOPE="SUBTREE"'-e
 
'PGADMIN_CONFIG_AUTHENTICATION_SOURCES="ldap","internal"' -v '/dockerdata/pgadmin/servers.json:/servers.json' -v
'/dockerdata/pgadmin/server.cert:/certs/server.cert'-v '/dockerdata/pgadmin/server.key:/certs/server.key' -e
PGADMIN_ENABLE_TLS=TRUE-e
 
PGADMIN_DEFAULT_PASSWORD=admin -e
PGADMIN_DEFAULT_EMAIL=mailto:admin@metronom.com http://registry.metroscales.io/rdb-dev/pgadmin:latest

As per your ldapsearch (ldapsearch -H ldap://http://ldap.mgi.de:389 -D "CN=SVCLDAP, CN=Users, DC=ASF, DC=madm, DC=net"
-W -b "dc=R2, dc=madm,dc=net" "(userPrincipalName=mailto:heiko.onnebrink@metronom.com)"), the pgAdmin LDAP parameters
shouldbe configured as below.
 

PGADMIN_CONFIG_AUTHENTICATION_SOURCES=["ldap", "internal"]
PGADMIN_CONFIG_LDAP_SERVER_URI="ldap://http://ldap.mgi.de:389"
PGADMIN_CONFIG_LDAP_BASE_DN="CN=Users, DC=ASF, DC=madm, DC=net"
PGADMIN_CONFIG_LDAP_USERNAME_ATTRIBUTE="CN"
PGADMIN_CONFIG_SEARCH_SCOPE="SUBTREE"
PGADMIN_CONFIG_LDAP_SEARCH_BASE_DN="dc=R2, dc=madm,dc=net"
PGADMIN_CONFIG_LDAP_SEARCH_FILTER="(userPrincipalName=mailto:heiko.onnebrink@metronom.com)"

The LDAP configuration details can be found
at https://www.pgadmin.org/docs/pgadmin4/4.21/enabling_ldap_authentication.html

When you try to login to the pgAdmin application, SVCLDAP should be given in the username input box.
Ref: https://www.pgadmin.org/docs/pgadmin4/4.21/login.html
 
2020-05-05 10:27:46,936: ERROR
flask.app: Error binding to the LDAP server.
Traceback (most recent call last):
  File "/pgadmin4/pgadmin/authenticate/ldap.py", line 115, in connect
    auto_bind=True
  File "/usr/local/lib/python3.7/site-packages/ldap3/core/connection.py", line 355, in __init__
    self.do_auto_bind()
  File "/usr/local/lib/python3.7/site-packages/ldap3/core/connection.py", line 384, in do_auto_bind
    raise LDAPBindError(self.last_error)
ldap3.core.exceptions.LDAPBindError: None

From config description I do not see how I pass a bind user that would required (as we do not allow anonymous access)
sothat an LDAP query can be executed that finds the logon user via his UPN. Once record is found we have the DN that
canbe used to bind the user with his entered password to verify that password is valid.
 
pgAdmin will first bind the LDAP server with the given configurations, then filter out user based on the
LDAP_SEARCH_BASE_DNand LDAP_SEARCH_FILTER configurations.
 

Thanks,
Khushboo
Thanks for sharing how it works internally and what mistake I have here in my config..

cheers
Heiko

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Geschäftsanschrift/Business address: METRO-NOM GmbH, Metro-Straße 12, 40235 Duesseldorf, Germany
Aufsichtsrat/Supervisory Board: Olaf Koch (Vorsitzender/Chairman)
Geschäftsführung/Management Board: Timo Salzsieder (Vorsitzender/CEO), Felix Lindemann (COO), Frank Hammerle (CFO)
Sitz Düsseldorf, Amtsgericht Düsseldorf, HRB 18232/Registered Office Düsseldorf, Commercial Register of the Düsseldorf
LocalCourt, HRB 18232 

Betreffend Mails von *@metronom.com <http://metrosystems.net/>
Die in dieser E-Mail enthaltenen Nachrichten und Anhänge sind ausschließlich für den bezeichneten Adressaten bestimmt.
Siekönnen rechtlich geschützte, vertrauliche Informationen enthalten. Falls Sie nicht der bezeichnete Empfänger oder
zumEmpfang dieser E-Mail nicht berechtigt sind, ist die Verwendung, Vervielfältigung oder Weitergabe der Nachrichten
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undvernichten Sie die E-Mail. 

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informationwhich may also be protected by professional secrecy. Unless you are the named addressee (or authorised to
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