Hello Khushboo, thnak you for your time and advice. We had to change the concept based on your recommendation, because as I wrote, we used external kdc on linux to provide krb ticket for the service and therefore there was not any user on AD. We created service user account on the AD (password never expire, AES 128/256 encryption), set service SPN to that user, generate keytab via ktpass command. When we use pgadmin to use this keytab and ask directly AD for kerberos ticket we ended with the error message
"ERROR pgadmin: Major (65536): An unsupported mechanism was requested, Minor (0): Unknown error" When I tried to get ticket for the service via kinit command a can get it, but default principal is not service SPN but the windows 2000 logon name of the user of AD which is this SPN mapped to? Do you have any idea/advice hot to solve this problem? Logs from the container 2023-01-07 10:16:44,252: DEBUG pgadmin: Authentication initiated via source: kerberos ::ffff:10.238.6.198 - - [07/Jan/2023:10:16:44 +0000] "GET /login?next=%2Fbrowser%2F HTTP/1.1" 401 4725 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.0.0 Safari/537.36 Edg/108.0.1462.54" 2023-01-07 10:16:44,388: DEBUG pgadmin: Authentication initiated via source: kerberos 2023-01-07 10:16:44,407: ERROR pgadmin: Major (65536): An unsupported mechanism was requested, Minor (0): Unknown error Traceback (most recent call last): File "/pgadmin4/pgadmin/authenticate/kerberos.py", line 237, in negotiate_start out_token = context.step(base64.b64decode(in_token)) File "/venv/lib/python3.10/site-packages/decorator.py", line 232, in fun return caller(func, *(extras + args), **kw) File "/venv/lib/python3.10/site-packages/gssapi/_utils.py", line 165, in check_last_err return func(self, *args, **kwargs) File "/venv/lib/python3.10/site-packages/decorator.py", line 232, in fun return caller(func, *(extras + args), **kw) File "/venv/lib/python3.10/site-packages/gssapi/_utils.py", line 131, in catch_and_return_token return func(self, *args, **kwargs) File "/venv/lib/python3.10/site-packages/gssapi/sec_contexts.py", line 582, in step return self._acceptor_step(token=token or b"") File "/venv/lib/python3.10/site-packages/gssapi/sec_contexts.py", line 590, in _acceptor_step res = rsec_contexts.accept_sec_context(token, self._creds, File "gssapi/raw/sec_contexts.pyx", line 270, in gssapi.raw.sec_contexts.accept_sec_context gssapi.raw.exceptions.BadMechanismError: Major (65536): An unsupported mechanism was requested, Minor (0): Unknown error Thank you very much for your time and investigation Ragards milanm From: Khushboo Vashi <khushboo.va...@enterprisedb.com> Sent: Wednesday, January 4, 2023 5:43 AM To: Milan MOLNÁR <milan_mol...@tatrabanka.sk> Cc: pgadmin-supp...@postgresql.org Subject: Re: pgadmin kerberos auth propblem - Delegated credentials not supplied. [EXTERNÝ E-MAIL] Tento e-mail prichádza z prostredia mimo Tatra banka Group. Hi, As you are using AD, there are 2 things you need to check. 1. Configure the AD server in a way that the UPN associated with HTTP should be able to delegate the tickets to the client. 2. Your browser should be able to support the kerberos ticket negotiation and delegation. Reference: https://www.pgadmin.org/docs/pgadmin4/6.18/kerberos.html<https://eur03.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.pgadmin.org%2Fdocs%2Fpgadmin4%2F6.18%2Fkerberos.html&data=05%7C01%7Ciskamomi%40rbinternational.onmicrosoft.com%7Cc258016e49a74e56125e08daee0e36ff%7C9b511fdaf0b143a5b06e1e720f64520a%7C0%7C0%7C638084042071648743%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=eqEPmDUZv6roU8HuuiOMSpU59YRoVRKRe7RR5YAXAhA%3D&reserved=0> https://www.youtube.com/watch?v=EDg6I21kCak<https://eur03.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3DEDg6I21kCak&data=05%7C01%7Ciskamomi%40rbinternational.onmicrosoft.com%7Cc258016e49a74e56125e08daee0e36ff%7C9b511fdaf0b143a5b06e1e720f64520a%7C0%7C0%7C638084042071648743%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=bGKoK71M6Nxdqs%2BoYsW4j46L2knQXDCe6r79XaJ6QTM%3D&reserved=0> Thanks, Khushboo On Tue, Jan 3, 2023 at 2:32 PM Milan MOLNÁR <milan_mol...@tatrabanka.sk<mailto:milan_mol...@tatrabanka.sk>> wrote: Hello, I have trouble to setup kerberos authetication with pgadmin. I run pgadmin in the docker container and I'd like to use SPENGO SSO to access pgadmin. Pgadmin fails to authenticate user and the error message is "'Delegated credentials not supplied." It seem, that credentials does not contain delegated part. Do you have any suggestion where is the problem with my setup? Do you use kerberos auth - pls can you share your setup or just explain it a little bit? We have kdc servers on the linux and there is trust between active directory (we use kerberos for many other services and it is working properly). I tried to connect from the PC where I'm loggend in the AD. Docker container Dockerfile FROM dpage/pgadmin4:6.17 COPY krb5.conf /etc/krb5.conf COPY config.py /pgadmin4/config.py config.py changed variables (we have reason why to change vars here) AUTHENTICATION_SOURCES = ['kerberos','internal'] KRB_APP_HOST_NAME = 'fqdn of pgadmin' KRB_KTNAME = '/var/lib/pgadmin/pgadmin.keytab' krb5.conf cat krb5-wsl.conf [libdefaults] clockskew = 18000 canonicalize = true dns_canonicalize_hostname= false rdns = false default_realm = EXAMPLE.COM<https://eur03.safelinks.protection.outlook.com/?url=http%3A%2F%2Fexample.com%2F&data=05%7C01%7Ciskamomi%40rbinternational.onmicrosoft.com%7Cc258016e49a74e56125e08daee0e36ff%7C9b511fdaf0b143a5b06e1e720f64520a%7C0%7C0%7C638084042071648743%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=hGC7V72n17fKenhVXN3M2H1Q9Szilx7GjbOABRmm6mU%3D&reserved=0> default_keytab_name=/var/lib/pgadmin/pgadmin.keytab dns_lookup_kdc = false #ignore_acceptor_hostname = true proxiable = true realm_try_domains = 1 dns_lookup_realm = false ticket_lifetime = 86400 renew_lifetime = 604800 forwardable = true #default_tgs_enctypes = aes256-cts-hmac-sha1-96 #default_tkt_enctypes = aes256-cts-hmac-sha1-96 permitted_enctypes = aes256-cts aes128-cts udp_preference_limit = 1 kdc_timeout = 5000 [realms] EXAMPLE.COM<https://eur03.safelinks.protection.outlook.com/?url=http%3A%2F%2Fexample.com%2F&data=05%7C01%7Ciskamomi%40rbinternational.onmicrosoft.com%7Cc258016e49a74e56125e08daee0e36ff%7C9b511fdaf0b143a5b06e1e720f64520a%7C0%7C0%7C638084042071648743%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=hGC7V72n17fKenhVXN3M2H1Q9Szilx7GjbOABRmm6mU%3D&reserved=0> = { kdc = kdc01.EXAMPLE.COM<https://eur03.safelinks.protection.outlook.com/?url=http%3A%2F%2Fkdc01.example.com%2F&data=05%7C01%7Ciskamomi%40rbinternational.onmicrosoft.com%7Cc258016e49a74e56125e08daee0e36ff%7C9b511fdaf0b143a5b06e1e720f64520a%7C0%7C0%7C638084042071648743%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=heY9YpRlidIwE%2Fn%2BROv6Q2FPVNldZuB2wnTpoMybjsY%3D&reserved=0> kdc = kdc02.EXAMPLE.COM<https://eur03.safelinks.protection.outlook.com/?url=http%3A%2F%2Fkdc02.example.com%2F&data=05%7C01%7Ciskamomi%40rbinternational.onmicrosoft.com%7Cc258016e49a74e56125e08daee0e36ff%7C9b511fdaf0b143a5b06e1e720f64520a%7C0%7C0%7C638084042071648743%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=Cx%2F31IWIHev%2FjUwpJUxiz4lD8UG1h%2BOnAYFcwr2jDGs%3D&reserved=0> admin_server = kdc01.EXAMPLE.COM<https://eur03.safelinks.protection.outlook.com/?url=http%3A%2F%2Fkdc01.example.com%2F&data=05%7C01%7Ciskamomi%40rbinternational.onmicrosoft.com%7Cc258016e49a74e56125e08daee0e36ff%7C9b511fdaf0b143a5b06e1e720f64520a%7C0%7C0%7C638084042071648743%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=heY9YpRlidIwE%2Fn%2BROv6Q2FPVNldZuB2wnTpoMybjsY%3D&reserved=0> default_domain = EXAMPLE.COM<https://eur03.safelinks.protection.outlook.com/?url=http%3A%2F%2Fexample.com%2F&data=05%7C01%7Ciskamomi%40rbinternational.onmicrosoft.com%7Cc258016e49a74e56125e08daee0e36ff%7C9b511fdaf0b143a5b06e1e720f64520a%7C0%7C0%7C638084042071804958%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=Sn6R%2FOAIt1rjkJOxzBoCIilrz6Nv06uh1wNBuWIHZV8%3D&reserved=0> } [domain_realm] .EXAMPLE.COM<https://eur03.safelinks.protection.outlook.com/?url=http%3A%2F%2Fexample.com%2F&data=05%7C01%7Ciskamomi%40rbinternational.onmicrosoft.com%7Cc258016e49a74e56125e08daee0e36ff%7C9b511fdaf0b143a5b06e1e720f64520a%7C0%7C0%7C638084042071804958%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=Sn6R%2FOAIt1rjkJOxzBoCIilrz6Nv06uh1wNBuWIHZV8%3D&reserved=0>=EXAMPLE.COM<https://eur03.safelinks.protection.outlook.com/?url=http%3A%2F%2Fexample.com%2F&data=05%7C01%7Ciskamomi%40rbinternational.onmicrosoft.com%7Cc258016e49a74e56125e08daee0e36ff%7C9b511fdaf0b143a5b06e1e720f64520a%7C0%7C0%7C638084042071804958%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=Sn6R%2FOAIt1rjkJOxzBoCIilrz6Nv06uh1wNBuWIHZV8%3D&reserved=0> EXAMPLE.COM<https://eur03.safelinks.protection.outlook.com/?url=http%3A%2F%2Fexample.com%2F&data=05%7C01%7Ciskamomi%40rbinternational.onmicrosoft.com%7Cc258016e49a74e56125e08daee0e36ff%7C9b511fdaf0b143a5b06e1e720f64520a%7C0%7C0%7C638084042071804958%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=Sn6R%2FOAIt1rjkJOxzBoCIilrz6Nv06uh1wNBuWIHZV8%3D&reserved=0> = EXAMPLE.COM<https://eur03.safelinks.protection.outlook.com/?url=http%3A%2F%2Fexample.com%2F&data=05%7C01%7Ciskamomi%40rbinternational.onmicrosoft.com%7Cc258016e49a74e56125e08daee0e36ff%7C9b511fdaf0b143a5b06e1e720f64520a%7C0%7C0%7C638084042071804958%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=Sn6R%2FOAIt1rjkJOxzBoCIilrz6Nv06uh1wNBuWIHZV8%3D&reserved=0> pgadmin4/pgadmin/authenticate/kerberos.py def negotiate_start(self, in_token): svc_princ = gssapi.Name('HTTP@%s' % config.KRB_APP_HOST_NAME, name_type=gssapi.NameType.hostbased_service) cname = svc_princ.canonicalize(gssapi.MechType.kerberos) try: server_creds = gssapi.Credentials(usage='accept', name=cname) context = gssapi.SecurityContext(creds=server_creds) out_token = context.step(base64.b64decode(in_token)) except Exception as e: current_app.logger.exception(e) return False, e if out_token and not context.complete: return False, out_token if context.complete: deleg_creds = context.delegated_creds if not hasattr(deleg_creds, 'name'): error_msg = gettext('Delegated credentials not supplied.') current_app.logger.error(error_msg) return False, Exception(error_msg) try: ... Thank you Regards Milanm ________________________________________________________________________ Informácie obsiahnuté v tomto dokumente sú určené výlučne pre potreby jeho adresáta. Dokument môže obsahovať informácie chránené bankovým alebo obchodným tajomstvom alebo informácie podliehajúce ochrane podľa iných právnych predpisov. V prípade, že Vám bol tento dokument doručený omylom, vyzývame Vás, aby ste sa zdržali odtajnenia alebo použitia pre vlastnú potrebu. Zároveň si Vás dovoľujeme požiadať, aby ste nás o takomto prípade bez zbytočného odkladu informovali a následne dokument zlikvidovali. The information contained in this document is intended exclusively for the needs of its addressee. The document may contain information protected by banking or trade secrets or information subject to protection under other legal regulations. In the event that this document was delivered to you by mistake, we urge you to refrain from declassifying it or using it for your own purposes. At the same time, we would like to request that you inform us of such a case without undue delay and then dispose of the document. Tatra banka, a.s. Hodžovo námestie 3, 811 06 Bratislava 1 IČO: 00 686 930 Zapísaná v obchodnom registri Okresného sudu Bratislava I Oddiel: Sa, vložka číslo: 71/B https://www.tatrabanka.sk
