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This commit is contained in:
Thomas Göttgens
2023-01-07 15:24:46 +01:00
parent 8465467aa8
commit d8b85f9a09
6 changed files with 25 additions and 17 deletions
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15
src/platform/esp32/ESP32CryptoEngine.cpp
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@@ -43,18 +43,21 @@ class ESP32CryptoEngine : public CryptoEngine
{
if (key.length > 0) {
uint8_t stream_block[16];
static uint8_t scratch[MAX_BLOCKSIZE];
size_t nc_off = 0;
LOG_DEBUG("ESP32 crypt fr=%x, num=%x, numBytes=%d!\n", fromNode, (uint32_t) packetId, numBytes);
initNonce(fromNode, packetId);
assert(numBytes <= MAX_BLOCKSIZE);
memcpy(scratch, bytes, numBytes);
memset(scratch + numBytes, 0,
if (numBytes <= MAX_BLOCKSIZE) {
static uint8_t scratch[MAX_BLOCKSIZE];
memcpy(scratch, bytes, numBytes);
memset(scratch + numBytes, 0,
sizeof(scratch) - numBytes); // Fill rest of buffer with zero (in case cypher looks at it)
auto res = mbedtls_aes_crypt_ctr(&aes, numBytes, &nc_off, nonce, stream_block, scratch, bytes);
assert(!res);
auto res = mbedtls_aes_crypt_ctr(&aes, numBytes, &nc_off, nonce, stream_block, scratch, bytes);
assert(!res);
} else {
LOG_ERROR("Packet too large for crypto engine: %d. noop encryption!\n", numBytes);
}
}
}