private void send_client_DH_inner_data(long retry_id) {
byte[] b_data = new byte[256];
Common.random.nextBytes(b_data);
BigInteger b = new BigInteger(1, b_data);
BigInteger g_b = g.modPow(b, dh_prime);
Common.logError(
"g_b length: " + g_b.toByteArray().length + " -> " + Common.toBytes(g_b).length);
BigInteger akey = g_a.modPow(b, dh_prime);
Common.logError("auth_key: " + akey.toString());
setAuthKey(Common.toBytes(akey));
// gen data (client_DH_inner_data)
TL.Object data_obj = TL.newObject("client_DH_inner_data", cl_nonce, sv_nonce, retry_id, g_b);
byte[] data = data_obj.serialize();
byte[] hash = Common.getSHA1(data);
byte[] data_with_hash = new byte[(hash.length + data.length + 15) / 16 * 16];
System.arraycopy(hash, 0, data_with_hash, 0, hash.length);
System.arraycopy(data, 0, data_with_hash, hash.length, data.length);
// send set_client_DH_params
TL.Object req_obj =
TL.newObject("set_client_DH_params", cl_nonce, sv_nonce, aes.IGE(data_with_hash, true));
send(req_obj, false, false);
}
private void TL_ResPQ(TL.Object obj) {
sv_nonce = obj.getBytes("server_nonce");
BigInteger pq = new BigInteger(1, obj.getBytes("pq"));
TL.Vector v_fp = obj.getVector("server_public_key_fingerprints");
fp = v_fp.getLong(0);
Common.logError("pq: " + pq.toString());
// prime factorization for pq
BigInteger q = Common.rho(pq);
BigInteger p = pq.divide(q);
if (p.compareTo(q) > 0) {
BigInteger t = p;
p = q;
q = t;
}
SecureRandom rnd = new SecureRandom();
new_nonce = new byte[32];
rnd.nextBytes(new_nonce);
// generate encrypted_data
TL.Object data_obj = TL.newObject("p_q_inner_data", pq, p, q, cl_nonce, sv_nonce, new_nonce);
byte[] data = data_obj.serialize();
byte[] hash = Common.getSHA1(data);
byte[] data_with_hash = new byte[255];
System.arraycopy(hash, 0, data_with_hash, 0, hash.length);
System.arraycopy(data, 0, data_with_hash, hash.length, data.length);
GEN_random_bytes(data_with_hash, data.length + hash.length, 255);
byte[] encrypted_data = Common.RSA(RSA_MODULUS, RSA_EXPONENT, data_with_hash);
// req_DH_params
TL.Object req_obj = TL.newObject("req_DH_params", cl_nonce, sv_nonce, p, q, fp, encrypted_data);
send(req_obj, false, false);
}