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change ctap_atomic_count to increase by user-specified amount

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Conor Patrick
2019-10-08 11:35:35 -04:00
parent 8e0eda8ed4
commit bb2929b28f
3 changed files with 12 additions and 19 deletions
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12
targets/stm32l432/src/device.c
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@@ -410,7 +410,7 @@ void authenticator_write_state(AuthenticatorState * a, int backup)
}
}
uint32_t ctap_atomic_count(int sel)
uint32_t ctap_atomic_count(uint32_t amount)
{
int offset = 0;
uint32_t * ptr = (uint32_t *)flash_addr(COUNTER1_PAGE);
@@ -425,10 +425,12 @@ uint32_t ctap_atomic_count(int sel)
uint32_t lastc = 0;
if (sel != 0)
if (amount == 0)
{
printf2(TAG_ERR,"counter2 not imple\n");
exit(1);
// Use a random count [1-16].
uint8_t rng[1];
ctap_generate_rng(rng, 1);
amount = (rng[1] & 0x0f) + 1;
}
for (offset = 0; offset < PAGE_SIZE/4; offset += 2) // wear-level the flash
@@ -461,7 +463,7 @@ uint32_t ctap_atomic_count(int sel)
return lastc;
}
lastc++;
lastc += amount;
if (lastc/256 > erases)
{