QByteArray Cipher::randomIv(int length)
{
if (length == 0) {//directly return empty byte array if no need to genenrate iv
return QByteArray();
}
Botan::AutoSeeded_RNG rng;
QByteArray out;
out.resize(length);
rng.randomize(reinterpret_cast<Botan::byte *>(out.data()), length);
return out;
}
void BuildResponseRecord::compile()
{
Botan::AutoSeeded_RNG rng;
rng.randomize(m_data.data() + 16, 495);
m_data[511] = (unsigned char)m_reply;
Botan::Pipe hashPipe(new Botan::Hash_Filter("SHA-256"));
hashPipe.start_msg();
hashPipe.write(m_data.data() + 16, 496);
hashPipe.end_msg();
hashPipe.read(m_header.data(), 16);
hashPipe.read(m_data.data(), 16);
}
QByteArray Encryptor::createRandomString()
{
QByteArray randomString;
Botan::AutoSeeded_RNG rng;
const uint RANDOM_DATA_SIZE = 256;
Botan::byte randomData[RANDOM_DATA_SIZE];
rng.randomize(randomData, RANDOM_DATA_SIZE);
for (int index = 0; index < RANDOM_DATA_SIZE; ++index) {
randomString.append(randomData[index]);
}
return randomString;
}
Message::Message()
{
Botan::AutoSeeded_RNG rng;
rng.randomize((unsigned char *)&m_msgId, sizeof(m_msgId));
}