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board/sg-nfc.c: Use non-hardcoded UID

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Turns out this does in fact vary between cards, even though its
actual value is unimportant.
This commit is contained in:
Tau
2018-12-17 17:09:56 -05:00
parent 9159be00a2
commit 755be05603
3 changed files with 27 additions and 11 deletions
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12
cardhook/_com12.c
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@ -13,13 +13,14 @@
#include "hooklib/uart.h"
#include "util/crc.h"
#include "util/dprintf.h"
#include "util/dump.h"
static HRESULT com12_handle_irp(struct irp *irp);
static HRESULT com12_handle_irp_locked(struct irp *irp);
static HRESULT com12_mifare_poll(void *ctx);
static HRESULT com12_mifare_poll(void *ctx, uint32_t *uid);
static HRESULT com12_mifare_read_luid(void *ctx, uint8_t *luid, size_t nbytes);
static HRESULT com12_led_set_color(void *ctx, uint8_t r, uint8_t g, uint8_t b);
@ -117,7 +118,7 @@ static HRESULT com12_handle_irp_locked(struct irp *irp)
return hr;
}
static HRESULT com12_mifare_poll(void *ctx)
static HRESULT com12_mifare_poll(void *ctx, uint32_t *uid)
{
HRESULT hr;
FILE *f;
@ -152,6 +153,13 @@ static HRESULT com12_mifare_poll(void *ctx)
com12_aime_luid[i] = byte;
}
/* NOTE: We are just arbitrarily using the CRC32 of the LUID here, real
cards do not work like this! However, neither the application code nor
the network protocol care what the UID is, it just has to be a stable
unique identifier for over-the-air NFC communications. */
*uid = crc32(com12_aime_luid, sizeof(com12_aime_luid), 0);
hr = S_OK;
end: