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crypto: Fix CCM mode when message size > 256

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Fixes part of issue #8107
This commit is contained in:
Mathias Tausig 2019-10-03 12:12:05 +02:00
parent 4c4cb8a14f
commit 116240d721
1 changed files with 4 additions and 2 deletions
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6
sys/crypto/modes/ccm.c
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@ -37,7 +37,8 @@ static inline int min(int a, int b)
static int ccm_compute_cbc_mac(cipher_t *cipher, const uint8_t iv[16],
const uint8_t *input, size_t length, uint8_t *mac)
{
uint8_t offset, block_size, mac_enc[16] = { 0 };
uint8_t block_size, mac_enc[16] = { 0 };
uint32_t offset;
block_size = cipher_get_block_size(cipher);
memmove(mac, iv, 16);
@ -244,7 +245,8 @@ int cipher_decrypt_ccm(cipher_t *cipher,
uint8_t nonce_counter[16] = { 0 }, mac_iv[16] = { 0 }, mac[16] = { 0 },
mac_recv[16] = { 0 }, stream_block[16] = { 0 },
zero_block[16] = { 0 },
plain_len, block_size;
block_size;
size_t plain_len;
if (mac_length % 2 != 0 || mac_length < 4 || mac_length > 16) {
return CCM_ERR_INVALID_MAC_LENGTH;