Thanks. It's working now using ipa-getkeytab. Correct me if I am wrong (as I am new to freeipa), using ktutil I could add multiple user in a keytab file (correct???) but in this case using ipa-getkeytab can I do the same?
On Fri, Feb 26, 2016 at 9:15 PM, David Kupka <[email protected]> wrote: > On 26/02/16 08:56, David Kupka wrote: > >> 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 >>> [email protected]*. 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 [email protected] -k 1 -e >>> aes256-cts-hmac-sha1-96 ktutil: write_kt keytab* >>> >>> When I tried *kinit -kt keytab [email protected]*, I get *"**kinit: >>> Password incorrect while getting initial credentials"* >>> Doing a trace using KRB5_TRACE on both calls >>> >>> *1. KRB5_TRACE=/dev/stderr kinit [email protected]* >>> 27242] 1456447025.219676: Getting initial credentials for >>> [email protected] >>> [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 [email protected]: >>> [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 [email protected] >>> [27242] 1456447072.237275: Storing [email protected] -> >>> krbtgt/[email protected] in KEYRING:persistent:1000:1000 >>> [27242] 1456447072.237330: Storing config in KEYRING:persistent:1000:1000 >>> for krbtgt/[email protected]: fast_avail: yes >>> [27242] 1456447072.237345: Storing [email protected] -> >>> >>> 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/[email protected]: pa_type: 2 >>> [27242] 1456447072.237380: Storing [email protected] -> >>> 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 [email protected]* >>> [27248] 1456447236.144685: Getting initial credentials for >>> [email protected] >>> [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 [email protected] 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 [email protected] -k ttester.keytab -e >> aes256-cts-hmac-sha1-96 >> $ kdestroy ttester >> $ kinit [email protected] -kt ttester.keytab >> >> HTH, >> >> > Oh, I forget to mention that this also sets random krbPrincipalKey for the > user so you can kinit only with the keytab. ipa-getkeytab has also option > -r (--retrive) that should not change krbPrincipalKey but for some reason > user is not allowed to retrieve it. > You can of course add ACI to allow that but I would not do it because > there's probably good reason why it's forbidden by default. > > -- > David Kupka >
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