bool ne7ssh_crypt::makeKexSecret (Botan::SecureVector<Botan::byte> &result, Botan::BigInt &f)
{
PK_Key_Agreement key_agreement(*privKexKey, "Raw");
SymmetricKey negotiated = key_agreement.derive_key(32, (byte*)f.data(), f.bytes(), "");
// SymmetricKey negotiated = privKexKey->derive_key (f);
if (!negotiated.length()) return false;
BigInt Kint (negotiated.begin(), negotiated.length());
ne7ssh_string::bn2vector(result, Kint);
K = Botan::SecureVector<Botan::byte>(result);
delete privKexKey;
privKexKey = 0;
return true;
}
QByteArray AbstractSshPacket::encodeMpInt(const Botan::BigInt &number)
{
if (number.is_zero())
return QByteArray(4, 0);
int stringLength = number.bytes();
const bool positiveAndMsbSet = number.sign() == Botan::BigInt::Positive
&& (number.byte_at(stringLength - 1) & 0x80);
if (positiveAndMsbSet)
++stringLength;
QByteArray data;
data.resize(4 + stringLength);
int pos = 4;
if (positiveAndMsbSet)
data[pos++] = '\0';
number.binary_encode(reinterpret_cast<Botan::byte *>(data.data()) + pos);
setLengthField(data);
return data;
}