QByteArray Cipher::decrypt(const QByteArray &buf, const Key &key, const QByteArray &iv, bool pad, bool *ok)
{
if(ok)
*ok = false;
const EVP_CIPHER *type = typeToCIPHER(key.type());
if(!type)
return QByteArray();
QByteArray out;
if(!lib_decryptArray(type, buf, key.data(), iv, pad, &out))
return QByteArray();
if(ok)
*ok = true;
return out;
}
vector<DirEntry>::iterator DirEntryList::_findFirst(const Key &hint, std::function<bool (const DirEntry&)> pred) {
//TODO Factor out a datastructure that keeps a sorted std::vector and allows these _findLowerBound()/_findUpperBound operations using this hinted linear search
if (_entries.size() == 0) {
return _entries.end();
}
double startpos_percent = static_cast<double>(*static_cast<const unsigned char*>(hint.data())) / std::numeric_limits<unsigned char>::max();
auto iter = _entries.begin() + static_cast<int>(startpos_percent * (_entries.size()-1));
ASSERT(iter >= _entries.begin() && iter < _entries.end(), "Startpos out of range");
while(iter != _entries.begin() && pred(*iter)) {
--iter;
}
while(iter != _entries.end() && !pred(*iter)) {
++iter;
}
return iter;
}
TimeProofService::TimeProof TimeProofService::getProof(LogicalTime time, const Key& key) {
stdx::lock_guard<stdx::mutex> lk(_cacheMutex);
auto timeCeil = LogicalTime(Timestamp(time.asTimestamp().asULL() | kRangeMask));
if (_cache && _cache->hasProof(timeCeil, key)) {
return _cache->_proof;
}
auto unsignedTimeArray = timeCeil.toUnsignedArray();
// update cache
_cache =
CacheEntry(SHA1Block::computeHmac(
key.data(), key.size(), unsignedTimeArray.data(), unsignedTimeArray.size()),
timeCeil,
key);
return _cache->_proof;
}
CryptorAESIV::CryptorAESIV (const Key &key, const IV &iv) :
encryptor(0),
decryptor(0)
{
LogDebug(mailiverse::core::crypt, "CryptorAES");
SymmetricKey _key (OctetString((const byte *)key.data(), key.size()));
InitializationVector _iv (OctetString((const byte *)iv.data(), iv.size()));
int keySize = key.size();
if (keySize == 16)
{
encryptor = new Pipe(get_cipher("AES-128/CBC/PKCS7", _key, _iv, ENCRYPTION));
decryptor = new Pipe(get_cipher("AES-128/CBC/PKCS7", _key, _iv, DECRYPTION));
}
else
{
encryptor = new Pipe(get_cipher("AES-256/CBC/PKCS7", _key, _iv, ENCRYPTION));
decryptor = new Pipe(get_cipher("AES-256/CBC/PKCS7", _key, _iv, DECRYPTION));
}
}
void write(std::ostream& out, const Key& key, const Val val) {
out.write((const char*)key.data(), key_len_);
Val v = std::min(max_val_, val);
out.write((const char*)&v, val_len_);
}