carddav with DIGEST-MD5

[Ken Murchison]

I had issues with the Apple clients and Digest.  Unless you really need 
Digest, I'd recommend using TLS + Basic.



On 07/23/2014 01:27 PM, Johan Hattne wrote:
> Hi Ken;
>
> That fixes the crash but results in a “401 Unauthorized”.  I’ll look into that a bit more at the next opportunity.
>
> This is using Contacts (8.0 1371) on an up-to-date OS X 10.9.4.  It also works on the iPhone (iOS 7.1.2).
>
> // Johan
>
>
> On Jul 23, 2014, at 10:55, Ken Murchison <murch at andrew.cmu.edu> wrote:
>
>> Hi Johan,
>>
>> I believe this issue is fixed by the following commit: http://git.cyrusimap.org/cyrus-sasl/commit/?id=76ce885a44e7cb511ba54ceae46349036abb9cc8
>>
>> BTW, which CardDAV client is using Digest?
>>
>>
>> On 07/22/2014 01:48 PM, Johan Hattne wrote:
>>> While PLAIN authentication works fine, I had the https daemon crash during DIGEST-MD5 authentication.  The crash turned out to be a divide error in libdigestmd5 from cyrus-sasl.  In particular (in cyrus-sasl’s plugins/digestmd5.c):
>>>
>>>    /* Create an initial cache entry for non-persistent HTTP connections */
>>>    unsigned val = hash((char *) nonce) % text->reauth->size;
>>>
>>> would fail due to text->reauth->size being zero.  If I’m reading this correctly, this appears to be the effect of initializing the plugin (as done in digestmd5_server_plug_init(), defined in same file as the snippet above) with an undefined reauth_timeout.  And indeed, adding "sasl_reauth_timeout: 10” to /etc/imapd.conf makes the crash go away.
>>>
>>> I didn’t expect a configuration without reauth_timeout to crash imapd, but I haven’t done enough research to be sure, nor to tell where the problem lies should this be a real issue.  Any further insight is greatly appreciated!
>>>
>>> // Cheers; Johan
>>>
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>>
>> -- 
>> Kenneth Murchison
>> Principal Systems Software Engineer
>> Carnegie Mellon University
>>


-- 
Kenneth Murchison
Principal Systems Software Engineer
Carnegie Mellon University