[jcifs] NullPointerException in
NtlmPasswordAuthentication.getNTLMv2Response(..)
SD
jcifs at sderman.com
Fri Nov 28 19:28:46 GMT 2008
One is my internal self-signed testing MS Exchange server.
The other is https://exchange.1and1.com
Thank you.
SD
______________________________________________________________________
Previous message on 11/28/08 at 12:43 PM -0500
**********************************************************************
>On Fri, Nov 28, 2008 at 4:59 AM, SD <jcifs at sderman.com> wrote:
>> I had a problem using NTLM authentication. Servers with NTLMv2 worked fine,
>> servers with NTLM pre v2 got a null pointer error.
>
>The problem isn't "servers with NTLM pre v2". It's simply that they
>are not returning the target info. That's a negotiated option.
>
>> targetInfo is null in these cases, below is the updated function from
>> NtlmPasswordAuthentication.java that has null checks.
>
>Ok. That seems logical. I'll apply these changes. Just out of
>curiosity, what are these servers that do not return targetInfo?
>
>Mike
>
>>
>> public static byte[] getNTLMv2Response(
>> byte[] responseKeyNT,
>> byte[] serverChallenge,
>> byte[] clientChallenge,
>> long time,
>> byte[] targetInfo)
>> {
>> byte[] temp = new byte[28 + (targetInfo == null ? 0 :
>> targetInfo.length)];
>>
>> Encdec.enc_uint32le(0x00000101, temp, 0); // Header
>> Encdec.enc_uint32le(0x00000000, temp, 4); // Reserved
>> Encdec.enc_uint64le((time +
>> SmbConstants.MILLISECONDS_BETWEEN_1970_AND_1601)
>> * 10000L, temp, 8);
>> System.arraycopy(clientChallenge, 0, temp, 16, 8);
>> Encdec.enc_uint32le(0x00000000, temp, 24); // Unknown
>> if(targetInfo != null)
>> System.arraycopy(targetInfo, 0, temp, 28,
>>targetInfo.length);
>>
>> return NtlmPasswordAuthentication.computeResponse(responseKeyNT,
>> serverChallenge,
>> temp,
>> 0,
>> temp.length);
>> }
>>
>>
>>
>>
>>
>>
>>
>
>
>
>--
>Michael B Allen
>PHP Active Directory SPNEGO SSO
>http://www.ioplex.com/
--
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From,
Shaun Derman
shaun at derman.com (604) 614-4094
(604) 614-8447
Bus. (604) 637-4894
http://www.derman.com
****
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