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clean up the crypto api

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This commit is contained in:
Kevin Hester
2021-02-23 10:10:35 +08:00
parent 94cd96cfde
commit 2761c85564
7 changed files with 135 additions and 105 deletions
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27
src/nrf52/NRF52CryptoEngine.cpp
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@@ -6,30 +6,13 @@
class NRF52CryptoEngine : public CryptoEngine
{
/// How many bytes in our key
uint8_t keySize = 0;
const uint8_t *keyBytes;
public:
NRF52CryptoEngine() {}
~NRF52CryptoEngine() {}
/**
* Set the key used for encrypt, decrypt.
*
* As a special case: If all bytes are zero, we assume _no encryption_ and send all data in cleartext.
*
* @param numBytes must be 16 (AES128), 32 (AES256) or 0 (no crypt)
* @param bytes a _static_ buffer that will remain valid for the life of this crypto instance (i.e. this class will cache the
* provided pointer)
*/
virtual void setKey(size_t numBytes, uint8_t *bytes)
{
keySize = numBytes;
keyBytes = bytes;
}
/**
* Encrypt a packet
*
@@ -39,11 +22,11 @@ class NRF52CryptoEngine : public CryptoEngine
{
// DEBUG_MSG("NRF52 encrypt!\n");
if (keySize != 0) {
if (key.length > 0) {
ocrypto_aes_ctr_ctx ctx;
initNonce(fromNode, packetNum);
ocrypto_aes_ctr_init(&ctx, keyBytes, keySize, nonce);
ocrypto_aes_ctr_init(&ctx, key.bytes, key.length, nonce);
ocrypto_aes_ctr_encrypt(&ctx, bytes, bytes, numBytes);
}
@@ -53,11 +36,11 @@ class NRF52CryptoEngine : public CryptoEngine
{
// DEBUG_MSG("NRF52 decrypt!\n");
if (keySize != 0) {
if (key.length > 0) {
ocrypto_aes_ctr_ctx ctx;
initNonce(fromNode, packetNum);
ocrypto_aes_ctr_init(&ctx, keyBytes, keySize, nonce);
ocrypto_aes_ctr_init(&ctx, key.bytes, key.length, nonce);
ocrypto_aes_ctr_decrypt(&ctx, bytes, bytes, numBytes);
}