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* ccid-driver.c (ccid_transceive): Add T=1 chaining for sending.

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This commit is contained in:
Werner Koch 2003-10-09 15:18:08 +00:00
parent 30342b06ef
commit 1bc1427e72
2 changed files with 75 additions and 33 deletions
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4
scd/ChangeLog
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@ -1,3 +1,7 @@
2003-10-09 Werner Koch <wk@gnupg.org>
* ccid-driver.c (ccid_transceive): Add T=1 chaining for sending.
2003-10-08 Werner Koch <wk@gnupg.org>
* app-openpgp.c (do_getattr): Support SERIALNO and AID.

100
scd/ccid-driver.c
View File

@ -132,6 +132,11 @@
#endif /* This source not used by scdaemon. */
/* Define to print information pertaining the T=1 protocol. */
#undef DEBUG_T1 1
enum {
RDR_to_PC_NotifySlotChange= 0x50,
RDR_to_PC_HardwareError = 0x51,
@ -566,7 +571,7 @@ bulk_in (ccid_driver_t handle, unsigned char *buffer, size_t length,
return -1;
}
DEBUGOUT_3 ("status: %02X error: %02X clock-status: %02X\n"
DEBUGOUT_3 ("status: %02X error: %02X octet[9]: %02X\n"
" data:", buffer[7], buffer[8], buffer[9] );
for (i=10; i < msglen; i++)
DEBUGOUT_CONT_1 (" %02X", buffer[i]);
@ -753,44 +758,62 @@ ccid_get_atr (ccid_driver_t handle,
int
ccid_transceive (ccid_driver_t handle,
const unsigned char *apdu, size_t apdulen,
const unsigned char *apdu_buf, size_t apdu_buflen,
unsigned char *resp, size_t maxresplen, size_t *nresp)
{
int rc;
unsigned char send_buffer[10+258], recv_buffer[10+258];
const unsigned char *apdu;
size_t apdulen;
unsigned char *msg, *tpdu, *p;
size_t msglen, tpdulen, n;
unsigned char seqno;
int i;
unsigned char crc;
size_t dummy_nresp;
int next_chunk = 1;
int sending = 1;
if (!nresp)
nresp = &dummy_nresp;
*nresp = 0;
/* Construct an I-Block. */
if (apdulen > 254)
return -1; /* Invalid length. */
tpdulen = 0; /* Avoid compiler warning about no initialization. */
msg = send_buffer;
tpdu = msg+10;
tpdu[0] = ((1 << 4) | 0); /* NAD: DAD=1, SAD=0 */
tpdu[1] = ((handle->t1_ns & 1) << 6); /* I-block */
tpdu[2] = apdulen;
memcpy (tpdu+3, apdu, apdulen);
crc = 0;
for (i=0,p=tpdu; i < apdulen+3; i++)
crc ^= *p++;
tpdu[3+apdulen] = crc;
tpdulen = apdulen + 4;
for (;;)
{
if (next_chunk)
{
next_chunk = 0;
apdu = apdu_buf;
apdulen = apdu_buflen;
assert (apdulen);
/* Construct an I-Block. */
if (apdulen > 254)
return -1; /* Invalid length. */
tpdu = msg+10;
tpdu[0] = ((1 << 4) | 0); /* NAD: DAD=1, SAD=0 */
tpdu[1] = ((handle->t1_ns & 1) << 6); /* I-block */
if (apdulen > 128 /* fixme: replace by ifsc */)
{
apdulen = 128;
apdu_buf += 128;
apdu_buflen -= 128;
tpdu[1] |= (1 << 5); /* Set more bit. */
}
tpdu[2] = apdulen;
memcpy (tpdu+3, apdu, apdulen);
crc = 0;
for (i=0,p=tpdu; i < apdulen+3; i++)
crc ^= *p++;
tpdu[3+apdulen] = crc;
tpdulen = apdulen + 4;
}
msg[0] = PC_to_RDR_XfrBlock;
msg[5] = 0; /* slot */
msg[6] = seqno = handle->seqno++;
@ -805,10 +828,12 @@ ccid_transceive (ccid_driver_t handle,
DEBUGOUT_CONT_1 (" %02X", msg[i]);
DEBUGOUT_LF ();
/* fprintf (stderr, "T1: put %c-block seq=%d\n", */
/* ((msg[11] & 0xc0) == 0x80)? 'R' : */
/* (msg[11] & 0x80)? 'S' : 'I', */
/* ((msg[11] & 0x80)? !!(msg[11]& 0x10) : !!(msg[11] & 0x40))); */
#ifdef DEBUG_T1
fprintf (stderr, "T1: put %c-block seq=%d\n",
((msg[11] & 0xc0) == 0x80)? 'R' :
(msg[11] & 0x80)? 'S' : 'I',
((msg[11] & 0x80)? !!(msg[11]& 0x10) : !!(msg[11] & 0x40)));
#endif
rc = bulk_out (handle, msg, msglen);
if (rc)
@ -829,12 +854,14 @@ ccid_transceive (ccid_driver_t handle,
return -1;
}
/* fprintf (stderr, "T1: got %c-block seq=%d err=%d\n", */
/* ((msg[11] & 0xc0) == 0x80)? 'R' : */
/* (msg[11] & 0x80)? 'S' : 'I', */
/* ((msg[11] & 0x80)? !!(msg[11]& 0x10) : !!(msg[11] & 0x40)), */
/* ((msg[11] & 0xc0) == 0x80)? (msg[11] & 0x0f) : 0 */
/* ); */
#ifdef DEBUG_T1
fprintf (stderr, "T1: got %c-block seq=%d err=%d\n",
((msg[11] & 0xc0) == 0x80)? 'R' :
(msg[11] & 0x80)? 'S' : 'I',
((msg[11] & 0x80)? !!(msg[11]& 0x10) : !!(msg[11] & 0x40)),
((msg[11] & 0xc0) == 0x80)? (msg[11] & 0x0f) : 0
);
#endif
if (!(tpdu[1] & 0x80))
{ /* This is an I-block. */
@ -899,9 +926,20 @@ ccid_transceive (ccid_driver_t handle,
{ /* Error: repeat last block */
msg = send_buffer;
}
else if (sending && !!(tpdu[1] & 0x40) == handle->t1_ns)
{ /* Reponse does not match our sequence number. */
DEBUGOUT ("R-block with wrong seqno received on more bit\n");
return -1;
}
else if (sending)
{ /* Send next chunk. */
msg = send_buffer;
next_chunk = 1;
handle->t1_ns ^= 1;
}
else
{
DEBUGOUT ("unxpectec ACK R-block received\n");
DEBUGOUT ("unexpected ACK R-block received\n");
return -1;
}
}