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Better mifare auth caching

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whowechina 2024-06-19 12:01:26 +08:00
parent c85e42094f
commit d37974fe22
1 changed files with 16 additions and 9 deletions
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25
firmware/src/lib/pn5180.c
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@ -468,27 +468,33 @@ bool pn5180_mifare_auth(const uint8_t uid[4], uint8_t block_id, uint8_t key_id,
} }
uint8_t ignored[16]; uint8_t ignored[16];
if (!pn5180_mifare_read(block_id & 0xfc, ignored)) { if (!pn5180_mifare_read((block_id & 0xfc) + 1, ignored)) {
DEBUG("\nPN5180 Mifare auth check bad"); DEBUG("\nPN5180 Mifare auth check bad");
return false; return false;
} }
cache.result = true; cache.result = true;
return true; return true;
} }
bool pn5180_mifare_read(uint8_t block_id, uint8_t block_data[16]) bool pn5180_mifare_read(uint8_t block_id, uint8_t block_data[16])
{ {
static struct { static struct {
uint8_t block_id;
uint32_t time; uint32_t time;
uint8_t data[16]; uint8_t data[16];
} cache = { 0 }; } cache[3] = { 0 };
uint32_t now = time_us_32(); uint32_t now = time_us_32();
if ((now < cache.time + 1000000) && (block_id == 0)) {
memcpy(block_data, cache.data, 16); if (block_id < 3) {
cache.time = now; if ((cache[block_id].block_id == block_id) &&
return true; (now < cache[block_id].time + 1000000)) {
memcpy(block_data, cache[block_id].data, 16);
cache[block_id].time = now;
return true;
}
} }
uint8_t cmd[] = { CMD_MIFARE_READ, block_id }; uint8_t cmd[] = { CMD_MIFARE_READ, block_id };
@ -504,9 +510,10 @@ bool pn5180_mifare_read(uint8_t block_id, uint8_t block_data[16])
pn5180_read_data(block_data, 16); pn5180_read_data(block_data, 16);
if (block_id == 0) { if (block_id < 3) {
memcpy(cache.data, block_data, 16); memcpy(cache[block_id].data, block_data, 16);
cache.time = time_us_32(); cache[block_id].block_id = block_id;
cache[block_id].time = time_us_32();
} }
return true; return true;