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Generate keys when Lora Region is set (#6951)

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* Generate keys when Lora Region changes

* Nest the ifs

* Even more entropy

* Namespacing
This commit is contained in:
Jonathan Bennett
2025-06-04 12:16:37 -05:00
committed by GitHub
parent a5716cf25c
commit 55b2bbf937
3 changed files with 32 additions and 1 deletions
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13
src/mesh/CryptoEngine.cpp
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@@ -3,12 +3,17 @@
#include "architecture.h"
#if !(MESHTASTIC_EXCLUDE_PKI)
#include "NodeDB.h"
#include "aes-ccm.h"
#include "meshUtils.h"
#include <Crypto.h>
#include <Curve25519.h>
#include <RNG.h>
#include <SHA256.h>
#if !(MESHTASTIC_EXCLUDE_PKI_KEYGEN)
#if !defined(ARCH_STM32WL)
#define CryptRNG RNG
#endif
/**
* Create a public/private key pair with Curve25519.
@@ -18,6 +23,14 @@
*/
void CryptoEngine::generateKeyPair(uint8_t *pubKey, uint8_t *privKey)
{
// Mix in any randomness we can, to make key generation stronger.
CryptRNG.begin(optstr(APP_VERSION));
if (myNodeInfo.device_id.size == 16) {
CryptRNG.stir(myNodeInfo.device_id.bytes, myNodeInfo.device_id.size);
}
auto noise = random();
CryptRNG.stir((uint8_t *)&noise, sizeof(noise));
LOG_DEBUG("Generate Curve25519 keypair");
Curve25519::dh1(public_key, private_key);
memcpy(pubKey, public_key, sizeof(public_key));