RFR 8044500: Add kinit options and krb5.conf flags that allow users to obtain renewable tickets and specify ticket lifetimes

[Wang Weijun]

> On Nov 18, 2014, at 07:43, Valerie Peng <valerie.peng at oracle.com> wrote:
> 
> 
> The default value 0 for the "renew_lifetime" is documented in MIT's Kerberos conf documentation. http://web.mit.edu/kerberos/krb5-devel/doc/admin/conf_files/krb5_conf.html
> However, I am not sure how this 0 value should be interpreted/handled.

From what I observe, MIT kinit by default sends a null rtime. So it is the same as us.

On the other hand, MIT kinit default sets RENEWABLE_OK, so it always receives a renewable ticket and the renewable lifetime set by KDC. In Java, we only set it when "renewable = true" is included in krb5.conf (see KDCOptions::setDefault), so by default java kinit gets a non-renewable ticket.

Thanks
Max


> Valerie
> On 11/17/2014 12:23 AM, Wang Weijun wrote:
>>> On Nov 15, 2014, at 09:25, Valerie Peng<valerie.peng at oracle.com>  wrote:
>>> 
>>> Max,
>>> 
>>> Most looks fine, just some questions.
>>> 
>>> - Kinit.java: line 56, it should be "sun.security.krb5.internal.tools.Kinit"?
>> Correct.
>> 
>>> - Kinit.java: for the switch block from 135 - 142: add a default case to catch illegal values?
>> Done.
>> 
>>> - Kinit.java: line 163, doesn't the credentials cache exist already?
>> This line would remove all existing service tickets so they will be re-acquired using the new TGT. I copied this behavior from other vendors.
>> 
>>> - KrbAsReq.java: line 128, what if rtime is 0 (default value)?
>> Not sure if I understand. There is no default value for "renew_lifetime". If it does not exist inside krb5.conf, then rtime is not reassigned, which is still null.
>> 
>>> - KDC.java: line 879-883, how can you be sure that there is always more than 1 eType and that the 2nd eType is supported.
>> I'll throw KDC_ERR_ETYPE_NOSUPP.
>> 
>> Thanks
>> Max
>> 
>>> Valerie
>>> 
>>> On 11/6/2014 10:31 AM, Valerie Peng wrote:
>>>> OK, I will take a look.
>>>> 
>>>> Thanks,
>>>> Valerie
>>>> 
>>>> On 11/5/2014 10:04 PM, Wang Weijun wrote:
>>>>> Ping ping...
>>>>> 
>>>>>> On Oct 20, 2014, at 13:22, Wang Weijun<weijun.wang at oracle.com>   wrote:
>>>>>> 
>>>>>> Anyone can take a look?
>>>>>> 
>>>>>>> On Sep 25, 2014, at 18:54, Wang Weijun<weijun.wang at oracle.com>   wrote:
>>>>>>> 
>>>>>>> Hi All
>>>>>>> 
>>>>>>> Please review the code change at
>>>>>>> 
>>>>>>> http://cr.openjdk.java.net/~weijun/8044500/webrev.00
>>>>>>> 
>>>>>>> It adds support for ticket_lifetime and renew_lifetime in krb5.conf, and add -r -l -R to kinit (on Windows).
>>>>>>> 
>>>>>>> Thanks
>>>>>>> Max
>>>>>>>