libchipcard, PC/SC ifdhandlers and 64bit systems

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Moin,

although it's nearly two months since I got my new machine with x64_64
architecture (Intel Core2 Duo, Gentoo amd64) I have yet to get
libchipcard working (and thus HBCI through gnucash) working again.

After trying some constellations which I didn't believe to work in the
first place and don't want to bother anyone with I have now arrived at
a fallback configuration which I think should work, but doesn't.

This is libchipcard3 3.0.2 (on Gentoo Linux 2006.1, compiled for
x86_64) with Ludovic Rousseau's ccid ifdhandler version 1.2.1 and an
Omnikey Cardman 5121.

The error message I get when trying to transmit an APDU is
commands.c:1091:CmdXfrBlockTPDU_T0() Command too long (-891425008 bytes) for max: 261 bytes

This indicates that the tx_length parameter in CmdXfrBlockTPDU (in
libccid) has been passed a ridiculously wrong value. This function
gets its tx_length straight from the DWORD TxLength parameter of
IFDHTransmitToICC() and gdb shows that the value is already wrong there:

Breakpoint 1, IFDHTransmitToICC (Lun=0, SendPci={Protocol = 47236763568210, Length = 0}, 
    TxBuffer=0x4 <Address 0x4 out of bounds>, TxLength=140736596930320,
    RxBuffer=0x7fff8028233c "+\001", RxLength=0x7fff80282330, RecvPci=0x2af62a82be29) at ifdhandler.c:909
909     {
(gdb) print sizeof(DWORD)
$1 = 8
(gdb) print sizeof(unsigned int)
$2 = 4
(gdb)


IFDHTransmitToICC() in turn is called (through some magic) in 
src/drivers/ifd/driverifd.c in libchipcard on line 423 as dct->transmitFn
which in driverifd_p.h is defined to be of type CCIDTRANSMIT_PTR where 
TxBufferLen is defined as GWEN_TYPE_UINT32.

So obviously there's some confusion about the length of the arguments.
I didn't find a specification as to what DWORD is defined to mean in the
PC/SC context so I don't know who is to blame here.

- -- 
Henryk Plötz
Grüße aus Berlin
~ Help Microsoft fight software piracy: Give Linux to a friend today! ~
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