RfidResearchGroup/proxmark3
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Fix hf 14a reader --ecp to work consistently

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kormax 2022-06-15 22:40:27 +03:00
parent 6118b11a3e
commit 5ea305be28
2 changed files with 9 additions and 4 deletions
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1
CHANGELOG.md
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@ -3,6 +3,7 @@ All notable changes to this project will be documented in this file.
This project uses the changelog in accordance with [keepchangelog](http://keepachangelog.com/). Please use this to write notable changes, which is not the same as git commit log...
## [unreleased][unreleased]
- Fixed `hf 14a reader --ecp` to work consistently (@kormax)
- Change `trace list -t 14a` to annotate ECP frames of all valid V1 and V2 formats (@kormax)
- Changed `hf mf staticnested` - significant speedups by using two encrypted nonces (@xianglin1998)
- Change use of `sprintf` in code to `snprintf` to fix compilation on macOS (@Doridian)

12
armsrc/iso14443a.c
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@ -2441,7 +2441,8 @@ static void iso14a_set_ATS_times(const uint8_t *ats) {
static int GetATQA(uint8_t *resp, uint8_t *resp_par, bool use_ecp, bool use_magsafe) {
#define ECP_DELAY 15
#define ECP_DELAY 10
#define ECP_RETRY_TIMEOUT 100
#define WUPA_RETRY_TIMEOUT 10 // 10ms
// 0x26 - REQA
@ -2457,12 +2458,14 @@ static int GetATQA(uint8_t *resp, uint8_t *resp_par, bool use_ecp, bool use_mags
uint32_t save_iso14a_timeout = iso14a_get_timeout();
iso14a_set_timeout(1236 / 128 + 1); // response to WUPA is expected at exactly 1236/fc. No need to wait longer.
bool first_try = true;
uint32_t retry_timeout = use_ecp ? ECP_RETRY_TIMEOUT : WUPA_RETRY_TIMEOUT;
uint32_t start_time = GetTickCount();
int len;
// we may need several tries if we did send an unknown command or a wrong authentication before...
do {
if (use_ecp) {
if (use_ecp && !first_try) {
uint8_t ecp[] = { 0x6a, 0x02, 0xC8, 0x01, 0x00, 0x03, 0x00, 0x02, 0x79, 0x00, 0x00, 0x00, 0x00, 0xC2, 0xD8};
ReaderTransmit(ecp, sizeof(ecp), NULL);
SpinDelay(ECP_DELAY);
@ -2476,12 +2479,13 @@ static int GetATQA(uint8_t *resp, uint8_t *resp_par, bool use_ecp, bool use_mags
}
}
// Broadcast for a card, WUPA (0x52) will force response from all cards in the field
ReaderTransmitBitsPar(wupa, 7, NULL, NULL);
// Receive the ATQA
len = ReaderReceive(resp, resp_par);
} while (len == 0 && GetTickCountDelta(start_time) <= WUPA_RETRY_TIMEOUT);
first_try = false;
} while (len == 0 && GetTickCountDelta(start_time) <= retry_timeout);
iso14a_set_timeout(save_iso14a_timeout);
return len;