Hoernchen has uploaded this change for review.
firmware: card_emu: fix 7816-3 10.3.2 0=256 case
add_tpdu_byte() accumulates bytes received from the reader, but passes
reader_to_card = 0, but ISO 7816-3 10.3.2 says P3 == 0 means 256 not 0
Only reachable with P3 == 0 in a receive data phase, but
simtrace2-cardem-pcsc only requests PB_AND_RX when there is command data.
Fix this anyway.
Change-Id: I0fa4741bc1293549816595e6b4e8af9e22bcfbc1
---
M firmware/libcommon/source/card_emu.c
1 file changed, 2 insertions(+), 1 deletion(-)
git pull ssh://gerrit.osmocom.org:29418/simtrace2 refs/changes/28/43128/1
diff --git a/firmware/libcommon/source/card_emu.c b/firmware/libcommon/source/card_emu.c
index 98ce662..d6e3bcc 100644
--- a/firmware/libcommon/source/card_emu.c
+++ b/firmware/libcommon/source/card_emu.c
@@ -745,7 +745,8 @@
{
struct msgb *msg;
struct cardemu_usb_msg_rx_data *rd;
- unsigned int num_data_bytes = t0_num_data_bytes(ch->tpdu.hdr[_P3], 0);
+ /* these are bytes the reader sends to us, so P3 is a literal count */
+ unsigned int num_data_bytes = t0_num_data_bytes(ch->tpdu.hdr[_P3], 1);
/* ensure we have a buffer */
if (!ch->uart_rx_msg) {
To view, visit change 43128. To unsubscribe, or for help writing mail filters, visit settings.