Re: D-TRUST-2048-Bit card .. Compute signature failed: Internal error

This would mean that this reader does not support 2048 bit
keys at all?
Schlumberger cards with 2048 bit keys work fine with this
reader.

In the meantime i tried this with SCM SPR 532, SCM SCR 335
and SCM SCR
333. All give the same result.

Cheers,
Simon

Am Mittwoch, den 14.03.2007, 15:26 +0100 schrieb Ludovic
Rousseau:
> On 14/03/07, Douglas E. Engert <deengertanl.gov> wrote:
> > I wonder if this is one of the cards/readers that
can not handle
> > the default max_send_size/max_recv_size = 256.
> 
> It looks like he is using the SCM SPR 532 [1]. This
reader is limited
> to an APDU of 260 bytes [2] (dwMaxCCIDMessageLength -
10) so only 255
> bytes of data.
> It is 1 byte less than the maximum.
> 
> You should only be able to get a 2040-bits length key
with this reader. Too bad!
> 
> Bye
> 
> [1] http://www.opensc-project.org/piperma
il/opensc-devel/2007-March/009623.html
> [2] http://svn.d
ebian.org/wsvn/pcsclite/trunk/Drivers/ccid/readers/SPR532.tx
t?op=file&rev=0&sc=0
> 
-- 
Simon Eisenmann

[ mailto:simonstruktur.de ]

[ struktur AG | Kronenstraße 22a | D-70173 Stuttgart ]
[ T. +49.711.896656.68 | F.+49.711.89665610 ]
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mailto:infostruktur.de ]

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On 14/03/07, Simon Eisenmann <simonstruktur.de> wrote:
> This would mean that this reader does not support 2048
bit keys at all?
> Schlumberger cards with 2048 bit keys work fine with
this reader.

It would be interesting to log the APDUs to see if/how 256
bytes are received.

> In the meantime i tried this with SCM SPR 532, SCM SCR
335 and SCM SCR
> 333. All give the same result.

All the SCM readers are limited. The SCR 335 and SCR 333 are
(even
more) limited to 248 bytes of data.

If you can, try with a reader from another manufacturer.

Bye,

-- 
  Dr. Ludovic Rousseau
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