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Code Activity

- Generalize CryptoInterface.

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- Add more HMAC and hash functions to CryptoInterface.

- Add MeshCryptoInterface as a holder of mesh specific crypto functionality.

- Rename broadcastMetadataDelimiter to metadataDelimiter in FloodingMesh since it is not just used for broadcasts, and to save some typing.
This commit is contained in:
Anders
2019-11-10 21:50:43 +01:00
parent 3132325bf8
commit 2fef67dcb0
9 changed files with 1055 additions and 138 deletions
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4
libraries/ESP8266WiFiMesh/src/EncryptedConnectionData.cpp
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@ -26,7 +26,7 @@
#include "UtilityFunctions.h"
#include "TypeConversionFunctions.h"
#include "JsonTranslator.h"
#include "CryptoInterface.h"
#include "MeshCryptoInterface.h"
using EspnowProtocolInterpreter::espnowHashKeyLength;
@ -128,7 +128,7 @@ uint64_t EncryptedConnectionData::getOwnSessionKey() const { return _ownSessionK
uint64_t EncryptedConnectionData::incrementSessionKey(uint64_t sessionKey, const uint8_t *hashKey, uint8_t hashKeyLength)
{
String hmac = CryptoInterface::createBearsslHmac(uint64ToString(sessionKey), hashKey, hashKeyLength);
String hmac = MeshCryptoInterface::createMeshHmac(uint64ToString(sessionKey), hashKey, hashKeyLength);
/* HMAC truncation should be OK since hmac sha256 is a PRF and we are truncating to the leftmost (MSB) bits.
PRF: https://crypto.stackexchange.com/questions/26410/whats-the-gcm-sha-256-of-a-tls-protocol/26434#26434