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btstack_crypto: fix encrypt/decrypt with block_len > 16

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This commit is contained in:
Matthias Ringwald 2018-10-29 21:45:21 +01:00
parent e5b6c4e973
commit 89be578cb9
1 changed files with 6 additions and 4 deletions
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10
src/btstack_crypto.c
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@ -567,9 +567,6 @@ static void btstack_crypto_ccm_handle_sn(btstack_crypto_ccm_t * btstack_crypto_c
}
static void btstack_crypto_ccm_next_block(btstack_crypto_ccm_t * btstack_crypto_ccm, btstack_crypto_ccm_state_t state_when_done){
#ifdef DEBUG_CCM
printf("btstack_crypto_ccm_next_block\n");
#endif
uint16_t bytes_to_process = btstack_min(btstack_crypto_ccm->block_len, 16);
// next block
btstack_crypto_ccm->counter++;
@ -577,11 +574,16 @@ static void btstack_crypto_ccm_next_block(btstack_crypto_ccm_t * btstack_crypto_
btstack_crypto_ccm->output += bytes_to_process;
btstack_crypto_ccm->block_len -= bytes_to_process;
btstack_crypto_ccm->message_len -= bytes_to_process;
#ifdef DEBUG_CCM
printf("btstack_crypto_ccm_next_block (message len %u, blockk_len %u)\n", btstack_crypto_ccm->message_len, btstack_crypto_ccm->block_len);
#endif
if (btstack_crypto_ccm->message_len == 0){
btstack_crypto_ccm->state = CCM_CALCULATE_S0;
} else {
btstack_crypto_ccm->state = state_when_done;
btstack_crypto_done(&btstack_crypto_ccm->btstack_crypto);
if (btstack_crypto_ccm->block_len == 0){
btstack_crypto_done(&btstack_crypto_ccm->btstack_crypto);
}
}
}