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* misc RegionMap and key store methods

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This commit is contained in:
Scott Powell 2025-11-03 18:14:44 +11:00
parent 03fc949014
commit f797744f7c
4 changed files with 130 additions and 22 deletions
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68
src/helpers/TransportKeyStore.cpp
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@ -12,7 +12,32 @@ uint16_t TransportKey::calcTransportCode(const mesh::Packet* packet) const {
return code;
}
int TransportKeyStore::loadKeysFor(const char* name, uint16_t id, TransportKey keys[], int max_num) {
void TransportKeyStore::putCache(uint16_t id, const TransportKey& key) {
if (num_cache < MAX_TKS_ENTRIES) {
cache_ids[num_cache] = id;
cache_keys[num_cache] = key;
num_cache++;
} else {
// TODO: evict oldest cache entry
}
}
void TransportKeyStore::getAutoKeyFor(uint16_t id, const char* name, TransportKey& dest) {
for (int i = 0; i < num_cache; i++) { // first, check cache
if (cache_ids[i] == id) { // cache hit!
dest = cache_keys[i];
return;
}
}
// calc key for publicly-known hashtag region name
SHA256 sha;
sha.update(name, strlen(name));
sha.finalize(&dest.key, sizeof(dest.key));
putCache(id, dest);
}
int TransportKeyStore::loadKeysFor(uint16_t id, TransportKey keys[], int max_num) {
int n = 0;
for (int i = 0; i < num_cache && n < max_num; i++) { // first, check cache
if (cache_ids[i] == id) {
@ -21,24 +46,35 @@ int TransportKeyStore::loadKeysFor(const char* name, uint16_t id, TransportKey k
}
if (n > 0) return n; // cache hit!
if (*name == '#') { // is a publicly-known hashtag region
SHA256 sha;
sha.update(name, strlen(name));
sha.finalize(&keys[0], sizeof(keys[0].key));
n = 1;
} else {
// TODO: retrieve from difficult-to-copy keystore
}
// TODO: retrieve from difficult-to-copy keystore
// store in cache (if room)
for (int i = 0; i < n; i++) {
if (num_cache < MAX_TKS_ENTRIES) {
cache_ids[num_cache] = id;
cache_keys[num_cache] = keys[i];
num_cache++;
} else {
// TODO: evict oldest cache entry
}
putCache(id, keys[i]);
}
return n;
}
bool TransportKeyStore::saveKeysFor(uint16_t id, const TransportKey keys[], int num) {
invalidateCache();
// TODO: update hardware keystore
return false; // failed
}
bool TransportKeyStore::removeKeys(uint16_t id) {
invalidateCache();
// TODO: remove from hardware keystore
return false; // failed
}
bool TransportKeyStore::clear() {
invalidateCache();
// TODO: clear hardware keystore
return false; // failed
}