On 26/02/16 02:22, Teik Hooi Beh wrote:
Hi,
I have manged to deployed 1 ipa master and 1 ipa client with success on
centos 7.2 with freeipa v4.2. I also managed to create user and set
sshd-rules to for ttester user and also successfully get krb ticket
using *kinit
ttes...@example.my*. I am trying to deploy password-less SSH login with
kerberos using the following guide (
https://uz.sns.it/~enrico/wordpress/2014/03/password-less-ssh-login-with-kerberos/)
-
snippet -
*$ ktutil ktutil: add_entry -password -p ttes...@example.my -k 1 -e
aes256-cts-hmac-sha1-96 ktutil: write_kt keytab*
When I tried *kinit -kt keytab ttes...@example.my*, I get *"**kinit:
Password incorrect while getting initial credentials"*
Doing a trace using KRB5_TRACE on both calls
*1. KRB5_TRACE=/dev/stderr kinit ttes...@example.my*
27242] 1456447025.219676: Getting initial credentials for ttes...@example.my
[27242] 1456447025.222070: Sending request (164 bytes) to EXAMPLE.MY
[27242] 1456447025.222223: Resolving hostname node1.example.my
[27242] 1456447035.238004: Initiating TCP connection to stream
192.168.38.2:88
[27242] 1456447035.238675: Sending TCP request to stream 192.168.38.2:88
[27242] 1456447035.241248: Received answer (337 bytes) from stream
192.168.38.2:88
[27242] 1456447035.241257: Terminating TCP connection to stream
192.168.38.2:88
[27242] 1456447035.241377: Response was from master KDC
[27242] 1456447035.241437: Received error from KDC: -1765328359/Additional
pre-authentication required
[27242] 1456447035.241484: Processing preauth types: 136, 19, 2, 133
[27242] 1456447035.241499: Selected etype info: etype aes256-cts, salt
"s`GD^,#=cA:Vr9hD", params ""
[27242] 1456447035.241504: Received cookie: MIT
Password for ttes...@example.my:
[27242] 1456447062.215750: AS key obtained for encrypted timestamp:
aes256-cts/73C6
[27242] 1456447062.215815: Encrypted timestamp (for 1456447062.215315):
plain 301AA011180F32303136303232363030333734325AA1050203034913, encrypted
F9A2E97E916FC14D141690E151A25DCC00168361179C7F0ACDA94C7F58F3D50429780A5608A6B8623E355F2A5BD676F6FA5272D38FD05C8B
[27242] 1456447062.215942: Preauth module encrypted_timestamp (2) (real)
returned: 0/Success
[27242] 1456447062.215948: Produced preauth for next request: 133, 2
[27242] 1456447062.215965: Sending request (257 bytes) to EXAMPLE.MY
[27242] 1456447062.216010: Resolving hostname node1.example.my
[27242] 1456447072.229254: Initiating TCP connection to stream
192.168.38.2:88
[27242] 1456447072.229655: Sending TCP request to stream 192.168.38.2:88
[27242] 1456447072.236955: Received answer (722 bytes) from stream
192.168.38.2:88
[27242] 1456447072.236974: Terminating TCP connection to stream
192.168.38.2:88
[27242] 1456447072.237080: Response was from master KDC
[27242] 1456447072.237117: Processing preauth types: 19
[27242] 1456447072.237125: Selected etype info: etype aes256-cts, salt
"s`GD^,#=cA:Vr9hD", params ""
[27242] 1456447072.237131: Produced preauth for next request: (empty)
[27242] 1456447072.237140: AS key determined by preauth: aes256-cts/73C6
[27242] 1456447072.237199: Decrypted AS reply; session key is:
aes256-cts/2A71
[27242] 1456447072.237216: FAST negotiation: available
[27242] 1456447072.237236: Initializing KEYRING:persistent:1000:1000 with
default princ ttes...@example.my
[27242] 1456447072.237275: Storing ttes...@example.my ->
krbtgt/example...@example.my in KEYRING:persistent:1000:1000
[27242] 1456447072.237330: Storing config in KEYRING:persistent:1000:1000
for krbtgt/example...@example.my: fast_avail: yes
[27242] 1456447072.237345: Storing ttes...@example.my ->
krb5_ccache_conf_data/fast_avail/krbtgt\/EXAMPLE.MY\@EXAMPLE.MY@X-CACHECONF:
in KEYRING:persistent:1000:1000
[27242] 1456447072.237371: Storing config in KEYRING:persistent:1000:1000
for krbtgt/example...@example.my: pa_type: 2
[27242] 1456447072.237380: Storing ttes...@example.my ->
krb5_ccache_conf_data/pa_type/krbtgt\/EXAMPLE.MY\@EXAMPLE.MY@X-CACHECONF:
in KEYRING:persistent:1000:1000
*2. KRB5_TRACE=/dev/stderr kinit -kt keytab ttes...@example.my*
[27248] 1456447236.144685: Getting initial credentials for
ttes...@example.my
[27248] 1456447236.147107: Looked up etypes in keytab: aes256-cts
[27248] 1456447236.147255: Sending request (164 bytes) to EXAMPLE.MY
[27248] 1456447236.147381: Resolving hostname node1.example.my
[27248] 1456447246.161528: Initiating TCP connection to stream
192.168.38.2:88
[27248] 1456447246.161970: Sending TCP request to stream 192.168.38.2:88
[27248] 1456447246.164772: Received answer (337 bytes) from stream
192.168.38.2:88
[27248] 1456447246.164791: Terminating TCP connection to stream
192.168.38.2:88
[27248] 1456447246.164904: Response was from master KDC
[27248] 1456447246.164943: Received error from KDC: -1765328359/Additional
pre-authentication required
[27248] 1456447246.164987: Processing preauth types: 136, 19, 2, 133
[27248] 1456447246.164997: Selected etype info: etype aes256-cts, salt
"s`GD^,#=cA:Vr9hD", params ""
[27248] 1456447246.165001: Received cookie: MIT
[27248] 1456447246.165142: Retrieving ttes...@example.my from FILE:keytab
(vno 0, enctype aes256-cts) with result: 0/Success
[27248] 1456447246.165166: AS key obtained for encrypted timestamp:
aes256-cts/0A17
[27248] 1456447246.165210: Encrypted timestamp (for 1456447246.164647):
plain 301AA011180F32303136303232363030343034365AA1050203028327, encrypted
C092E6C29FC1CD794625CF12162D18767A68D1728E6C2ADC1F50492D6605E039B664213C29767715E04B3CA8D97EBD691BBF40B76370C9FA
[27248] 1456447246.165224: Preauth module encrypted_timestamp (2) (real)
returned: 0/Success
[27248] 1456447246.165228: Produced preauth for next request: 133, 2
[27248] 1456447246.165239: Sending request (257 bytes) to EXAMPLE.MY
[27248] 1456447246.165253: Resolving hostname node1.example.my
[27248] 1456447256.178637: Initiating TCP connection to stream
192.168.38.2:88
[27248] 1456447256.179456: Sending TCP request to stream 192.168.38.2:88
[27248] 1456447256.184929: Received answer (167 bytes) from stream
192.168.38.2:88
[27248] 1456447256.184941: Terminating TCP connection to stream
192.168.38.2:88
[27248] 1456447256.185043: Response was from master KDC
[27248] 1456447256.185065: Received error from KDC: -1765328353/Decrypt
integrity check failed
kinit: Password incorrect while getting initial credentials
From the 2 trace I notice the return bytes on return from calling using
keytab is only 167 bytes compare to 722 bytes. Does anybody know the
reasons or could point me to where I could debug further?
Thanks
Hello!
I don't know why it does not work with ktutil but I've find other way
how to get keytab for a user:
$ kinit ttester
$ ipa-getkeytab -p ttes...@example.test -k ttester.keytab -e
aes256-cts-hmac-sha1-96
$ kdestroy ttester
$ kinit ttes...@example.test -kt ttester.keytab
HTH,
--
David Kupka
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