Active Directory - Hortonworks MIT Kerberos cross realm trust establishment

Mon Jun 17 05:22:10 EDT 2019

We are trying to configure IWA for SAS Data Loader for Hadoop (DLH). SAS Servers are running under Active Directory domain and SSO is successfully configured. We need to configure DLH to talk to Hortonworks Hadoop MIT Kerberos using client generated tickets. That functionality is not working. So basically we have problem with AD (ABC.COM) and Hadoop MIT Kerberos (xyz - Hadoop realm name doesnt have any FQDN and it is all small letters) 2 way trust establishment. We have confiure the trust as per the following link (https://docs.hortonworks.com/HDPDocuments/HDP2/HDP-2.6.0/bk_security/content/kerb-config-realm-kdc.html) and everything worked fine but somehow using AD's HTTP ticket, we are not able to login to hadoop and we get the following error message:

com.sas.svcs.dm.hadoop.spi.exception.HadoopConfigurationException: Failed to find GSSCredential. Check Kerberos configuration

we have tried hell lot of troubleshooting. Now finally it has been finalized that we have issue with trust and to test following are the steps are asked to perform.

on SAS Server (linux)

kinit -f HTTP/xxx.abc.com at ABC.COM

klist -eaf

kvno hive/xyz at xyz

if all these above steps works, that means we have trust enabled

This is the error which we see

kvno: KDC returned error string: PROCESS_TGS while getting credentials for hive/xyz at xyz

and

kvno: Decrypt integrity check failed while getting credentials for hive/xyz at xyz

kinit -f HTTP/xxx.abc.com at ABC.COM (this works fine)
Command logs

# kinit -k -t xxx.host.keytab HTTP/xxx.abc.com at ABC.COM
[65181] 1559895039.846538: Getting initial credentials for HTTP/xxx.abc.com at ABC.COM
[65181] 1559895039.846539: Looked up etypes in keytab: des-cbc-crc, des, des-cbc-crc, rc4-hmac, aes256-cts, aes128-cts
[65181] 1559895039.846541: Sending unauthenticated request
[65181] 1559895039.846542: Sending request (220 bytes) to ABC.COM
[65181] 1559895039.846543: Sending initial UDP request to dgram 10.68.5.219:88
[65181] 1559895039.846544: Received answer (819 bytes) from dgram 10.68.5.219:88
[65181] 1559895039.846545: Response was from master KDC
[65181] 1559895039.846546: Processing preauth types: PA-ETYPE-INFO2 (19)
[65181] 1559895039.846547: Selected etype info: etype aes256-cts, salt "ABC.COMHTTPxxx.abc.com", params ""
[65181] 1559895039.846548: Produced preauth for next request: (empty)
[65181] 1559895039.846549: Getting AS key, salt "ABC.COMHTTPxxx.abc.com", params ""
[65181] 1559895039.846550: Retrieving HTTP/xxx.abc.com at ABC.COM from FILE:xxx.host.keytab (vno 0, enctype aes256-cts) with result: 0/Success
[65181] 1559895039.846551: AS key obtained from gak_fct: aes256-cts/8AEB
[65181] 1559895039.846552: Decrypted AS reply; session key is: aes256-cts/E734
[65181] 1559895039.846553: FAST negotiation: unavailable
[65181] 1559895039.846554: Initializing FILE:/tmp/krb5cc_0 with default princ HTTP/xxx.abc.com at ABC.COM
[65181] 1559895039.846555: Storing HTTP/xxx.abc.com at ABC.COM -> krbtgt/ABC.COM at ABC.COM in FILE:/tmp/krb5cc_0

##########################################################

klist -e (this shows the ticket is generated)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

# klist -e
Ticket cache: FILE:/tmp/krb5cc_0
Default principal: HTTP/xxx.abc.com at ABC.COM

Valid starting       Expires              Service principal
06/07/2019 13:40:39  06/07/2019 13:50:39  krbtgt/ABC.COM at ABC.COM
        Etype (skey, tkt): aes256-cts-hmac-sha1-96, aes256-cts-hmac-sha1-96

###########################################################

kvno hive/xyz at xyz (this command fails)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

# kvno hive/xyz at xyz
[65247] 1559895064.242178: Getting credentials HTTP/xxx.abc.com at ABC.COM -> hive/xyz at xyz using ccache FILE:/tmp/krb5cc_0
[65247] 1559895064.242179: Retrieving HTTP/xxx.abc.com at ABC.COM -> hive/xyz at xyz from FILE:/tmp/krb5cc_0 with result: -1765328243/Matching credential not found (filename: /tmp/krb5cc_0)
[65247] 1559895064.242180: Retrieving HTTP/xxx.abc.com at ABC.COM -> krbtgt/xyz at xyz from FILE:/tmp/krb5cc_0 with result: -1765328243/Matching credential not found (filename: /tmp/krb5cc_0)
[65247] 1559895064.242181: Retrieving HTTP/xxx.abc.com at ABC.COM -> krbtgt/ABC.COM at ABC.COM from FILE:/tmp/krb5cc_0 with result: 0/Success
[65247] 1559895064.242182: Starting with TGT for client realm: HTTP/xxx.abc.com at ABC.COM -> krbtgt/ABC.COM at ABC.COM
[65247] 1559895064.242183: Retrieving HTTP/xxx.abc.com at ABC.COM -> krbtgt/xyz at xyz from FILE:/tmp/krb5cc_0 with result: -1765328243/Matching credential not found (filename: /tmp/krb5cc_0)
[65247] 1559895064.242184: Requesting TGT krbtgt/xyz at ABC.COM using TGT krbtgt/ABC.COM at ABC.COM
[65247] 1559895064.242185: Generated subkey for TGS request: aes256-cts/C142
[65247] 1559895064.242186: etypes requested in TGS request: aes256-cts, aes128-cts, aes256-sha2, aes128-sha2, des3-cbc-sha1, rc4-hmac, camellia128-cts, camellia256-cts, des-cbc-crc, des, des-cbc-md4
[65247] 1559895064.242188: Encoding request body and padata into FAST request
[65247] 1559895064.242189: Sending request (1001 bytes) to ABC.COM
[65247] 1559895064.242190: Sending initial UDP request to dgram 10.68.5.219:88
[65247] 1559895064.242191: Received answer (873 bytes) from dgram 10.68.5.219:88
[65247] 1559895064.242192: Response was from master KDC
[65247] 1559895064.242193: Decoding FAST response
[65247] 1559895064.242194: FAST reply key: aes256-cts/9192
[65247] 1559895064.242195: TGS reply is for HTTP/xxx.abc.com at ABC.COM -> krbtgt/xyz at ABC.COM with session key des-cbc-crc/330F
[65247] 1559895064.242196: TGS request result: 0/Success
[65247] 1559895064.242197: Storing HTTP/xxx.abc.com at ABC.COM -> krbtgt/xyz at ABC.COM in FILE:/tmp/krb5cc_0
[65247] 1559895064.242198: Received TGT for service realm: krbtgt/xyz at ABC.COM
[65247] 1559895064.242199: Requesting tickets for hive/xyz at xyz, referrals on
[65247] 1559895064.242200: Generated subkey for TGS request: des-cbc-crc/FB8F
[65247] 1559895064.242201: etypes requested in TGS request: aes256-cts, aes128-cts, aes256-sha2, aes128-sha2, des3-cbc-sha1, rc4-hmac, camellia128-cts, camellia256-cts, des-cbc-crc, des, des-cbc-md4
[65247] 1559895064.242203: Encoding request body and padata into FAST request
[65247] 1559895064.242204: Sending request (935 bytes) to xyz
[65247] 1559895064.242205: Resolving hostname xyz
[65247] 1559895064.242206: Sending initial UDP request to dgram 10.68.166.7:88
[65247] 1559895064.242207: Received answer (138 bytes) from dgram 10.68.166.7:88
[65247] 1559895064.242208: Response was not from master KDC
[65247] 1559895064.242209: TGS request result: -1765328324/KDC returned error string: PROCESS_TGS
[65247] 1559895064.242210: Requesting tickets for hive/xyz at xyz, referrals off
[65247] 1559895064.242211: Generated subkey for TGS request: des-cbc-crc/01C2
[65247] 1559895064.242212: etypes requested in TGS request: aes256-cts, aes128-cts, aes256-sha2, aes128-sha2, des3-cbc-sha1, rc4-hmac, camellia128-cts, camellia256-cts, des-cbc-crc, des, des-cbc-md4
[65247] 1559895064.242214: Encoding request body and padata into FAST request
[65247] 1559895064.242215: Sending request (935 bytes) to xyz
[65247] 1559895064.242216: Resolving hostname xyz
[65247] 1559895064.242217: Sending initial UDP request to dgram 10.68.166.7:88
[65247] 1559895064.242218: Received answer (138 bytes) from dgram 10.68.166.7:88
[65247] 1559895064.242219: Response was not from master KDC
[65247] 1559895064.242220: TGS request result: -1765328324/KDC returned error string: PROCESS_TGS
kvno: KDC returned error string: PROCESS_TGS while getting credentials for hive/xyz at xyz

@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@

Also just for troubleshooting I add enctypes on my AD server using the following command:

ksetup /SetEncTypeAttr xyz DES-CBC-CRC DES-CBC-MD5 RC4-HMAC-MD5 AES128-CTS-HMAC-SHA1-96 AES256-CTS-HMAC-SHA1-96

So, after running the above command when I try to run the kvno command, my error message changes

:from

kvno: KDC returned error string: PROCESS_TGS while getting credentials for hive/xyz at xyz

:to

kvno: Decrypt integrity check failed while getting credentials for hive/xyz at xyz

full kvno cmmand trace is as below:

# kvno hive/xyz at xyz
[128763] 1559917554.849763: Getting credentials HTTP/xxx.abc.com at ABC.COM -> hive/xyz at xyz using ccache FILE:/tmp/krb5cc_0
[128763] 1559917554.849764: Retrieving HTTP/xxx.abc.com at ABC.COM -> hive/xyz at xyz from FILE:/tmp/krb5cc_0 with result: -1765328243/Matching credential not found (filename: /tmp/krb5cc_0)
[128763] 1559917554.849765: Retrieving HTTP/xxx.abc.com at ABC.COM -> krbtgt/xyz at xyz from FILE:/tmp/krb5cc_0 with result: -1765328243/Matching credential not found (filename: /tmp/krb5cc_0)
[128763] 1559917554.849766: Retrieving HTTP/xxx.abc.com at ABC.COM -> krbtgt/ABC.COM at ABC.COM from FILE:/tmp/krb5cc_0 with result: 0/Success
[128763] 1559917554.849767: Starting with TGT for client realm: HTTP/xxx.abc.com at ABC.COM -> krbtgt/ABC.COM at ABC.COM
[128763] 1559917554.849768: Retrieving HTTP/xxx.abc.com at ABC.COM -> krbtgt/xyz at xyz from FILE:/tmp/krb5cc_0 with result: -1765328243/Matching credential not found (filename: /tmp/krb5cc_0)
[128763] 1559917554.849769: Requesting TGT krbtgt/xyz at ABC.COM using TGT krbtgt/ABC.COM at ABC.COM
[128763] 1559917554.849770: Generated subkey for TGS request: aes256-cts/4F0F
[128763] 1559917554.849771: etypes requested in TGS request: aes256-cts, aes128-cts, aes256-sha2, aes128-sha2, des3-cbc-sha1, rc4-hmac, camellia128-cts, camellia256-cts, des-cbc-crc, des, des-cbc-md4
[128763] 1559917554.849773: Encoding request body and padata into FAST request
[128763] 1559917554.849774: Sending request (1022 bytes) to ABC.COM
[128763] 1559917554.849775: Sending initial UDP request to dgram 10.68.5.219:88
[128763] 1559917554.849776: Received answer (969 bytes) from dgram 10.68.5.219:88
[128763] 1559917554.849777: Response was from master KDC
[128763] 1559917554.849778: Decoding FAST response
[128763] 1559917554.849779: FAST reply key: aes256-cts/944C
[128763] 1559917554.849780: TGS reply is for HTTP/xxx.abc.com at ABC.COM -> krbtgt/xyz at ABC.COM with session key aes256-cts/B3D3
[128763] 1559917554.849781: TGS request result: 0/Success
[128763] 1559917554.849782: Storing HTTP/xxx.abc.com at ABC.COM -> krbtgt/xyz at ABC.COM in FILE:/tmp/krb5cc_0
[128763] 1559917554.849783: Received TGT for service realm: krbtgt/xyz at ABC.COM
[128763] 1559917554.849784: Requesting tickets for hive/xyz at xyz, referrals on
[128763] 1559917554.849785: Generated subkey for TGS request: aes256-cts/DF91
[128763] 1559917554.849786: etypes requested in TGS request: aes256-cts, aes128-cts, aes256-sha2, aes128-sha2, des3-cbc-sha1, rc4-hmac, camellia128-cts, camellia256-cts, des-cbc-crc, des, des-cbc-md4
[128763] 1559917554.849788: Encoding request body and padata into FAST request
[128763] 1559917554.849789: Sending request (1013 bytes) to xyz
[128763] 1559917554.849790: Resolving hostname xyz
[128763] 1559917554.849791: Sending initial UDP request to dgram 10.68.166.7:88
[128763] 1559917554.849792: Received answer (138 bytes) from dgram 10.68.166.7:88
[128763] 1559917554.849793: Response was not from master KDC
[128763] 1559917554.849794: TGS request result: -1765328353/Decrypt integrity check failed
[128763] 1559917554.849795: Requesting tickets for hive/xyz at xyz, referrals off
[128763] 1559917554.849796: Generated subkey for TGS request: aes256-cts/34D1
[128763] 1559917554.849797: etypes requested in TGS request: aes256-cts, aes128-cts, aes256-sha2, aes128-sha2, des3-cbc-sha1, rc4-hmac, camellia128-cts, camellia256-cts, des-cbc-crc, des, des-cbc-md4
[128763] 1559917554.849799: Encoding request body and padata into FAST request
[128763] 1559917554.849800: Sending request (1013 bytes) to xyz
[128763] 1559917554.849801: Resolving hostname xyz
[128763] 1559917554.849802: Sending initial UDP request to dgram 10.68.166.7:88
[128763] 1559917554.849803: Received answer (138 bytes) from dgram 10.68.166.7:88

[128763] 1559917554.849805: TGS request result: -1765328353/Decrypt integrity check failed
kvno: Decrypt integrity check failed while getting credentials for hive/xyz at xyz