int OTPCalculator_Init (OTPCalculator *calc, int num_otps, int cipher)
{
ASSERT(num_otps >= 0)
ASSERT(BEncryption_cipher_valid(cipher))
// init arguments
calc->num_otps = num_otps;
calc->cipher = cipher;
// remember block size
calc->block_size = BEncryption_cipher_block_size(calc->cipher);
// calculate number of blocks
if (calc->num_otps > SIZE_MAX / sizeof(otp_t)) {
goto fail0;
}
calc->num_blocks = bdivide_up(calc->num_otps * sizeof(otp_t), calc->block_size);
// allocate buffer
if (!(calc->data = (otp_t *)BAllocArray(calc->num_blocks, calc->block_size))) {
goto fail0;
}
// init debug object
DebugObject_Init(&calc->d_obj);
return 1;
fail0:
return 0;
}
void OTPGenerator_SetSeed (OTPGenerator *g, uint8_t *key, uint8_t *iv)
{
DebugObject_Access(&g->d_obj);
// free existing work
if (g->tw_have) {
BThreadWork_Free(&g->tw);
}
// copy key and IV
memcpy(g->tw_key, key, BEncryption_cipher_key_size(g->cipher));
memcpy(g->tw_iv, iv, BEncryption_cipher_block_size(g->cipher));
// start work
BThreadWork_Init(&g->tw, g->twd, (BThreadWork_handler_done)work_done_handler, g, (BThreadWork_work_func)work_func, g);
// set have work
g->tw_have = 1;
}
void OTPChecker_AddSeed (OTPChecker *mc, uint16_t seed_id, uint8_t *key, uint8_t *iv)
{
ASSERT(mc->next_table >= 0)
ASSERT(mc->next_table < mc->num_tables)
DebugObject_Access(&mc->d_obj);
// free existing work
if (mc->tw_have) {
BThreadWork_Free(&mc->tw);
}
// set table's seed ID
mc->tables[mc->next_table].id = seed_id;
// copy key and IV
memcpy(mc->tw_key, key, BEncryption_cipher_key_size(mc->cipher));
memcpy(mc->tw_iv, iv, BEncryption_cipher_block_size(mc->cipher));
// start work
BThreadWork_Init(&mc->tw, mc->twd, (BThreadWork_handler_done)work_done_handler, mc, (BThreadWork_work_func)work_func, mc);
// set have work
mc->tw_have = 1;
}
