Hello Paul,
On Saturday, January 3, 2015 9:36:22 PM UTC+5:30, Paul Koning wrote:
>
> What is SCST?   

SCST is SCSI target sub-system for linux. 

>
>
> Various crypto protocols indeed uses SHA-1 (typically in more complex form 
> like HMAC) for message authentication.  And each of them will obviously 
> have some identifier for that.  But that has nothing to do with CHAP.  For 
> CHAP in iSCSI, you have to look in the iSCSI RFC, and you will find in 
> there only a single identifier, which is for CHAP using MD5. 
>
Yes ,you are right. But their is some correction. In iSCSI RFC(3720) page 
186 (CHAP 11.1.4)  Points to RFC1994(CHAP) for the implementation of CHAP 
and RFC3720 also mandates initiator/targets to implement MD5 as one 
required option. But it does not bar the possibility of implementing another 
hash 
algorithm with CHAP.  

>
> It would certainly be possible to define CHAP using SHA-1 (or for that 
> matter SHA-2) but that hasn’t been done and there hasn’t been a significant 
> push for it.  While MD5 has issues, those do not affect its use in CHAP. 
>
> Correct. while going through SCST target code i found it implements 
SHA-1.I am just experimenting, thought if their are any initiators that 
support SHA. 

>         paul 
>

Thanks and regards.
Tejas V 

>
> > On Jan 3, 2015, at 4:15 AM, Tejas vaykole <[email protected] 
> <javascript:>> wrote: 
> > 
> > Hello, 
> > I am looking at the SCST target code, where it looks like it supports 
> the SHA-1 Algorithim for message digest generation.The number assigned to 
> SHA-1 is '7' 
> > 
> > Thanks. 
> > Tejas 
> > 
> > On Monday, September 15, 2014 11:30:52 AM UTC+5:30, Uli wrote: 
> > >>> Tejas vaykole <[email protected]> schrieb am 11.09.2014 um 12:22 
> in 
> > Nachricht <[email protected] 
> <javascript:>>: 
> > > Hello, 
> > > 
> > > I am trying out with the open-iscsi initiator.I see that the initiator 
> uses 
> > > MD5 algorithm for CHAP. 
> > > I need help in configuring the initiator to use SHA-1 hashing 
> Algorithm for 
> > > CHAP. 
> > 
> > Whcih algorithm number has been assigned to SHA-1 for CHAP? Ic ould not 
> find it. 
> > 
> > > 
> > > Thanks. 
> > > Tejas 
>

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