public static async Task <Step2Result> Do(ResPq resPq, Int256 newNonce, MtProtoPlainTransport transport)
{
var pqBts = resPq.Pq.ToArrayUnsafe();
Helpers.Assert(pqBts.Length <= 8, "auth step2: pq is too big");
var pq = new BigInteger(1, pqBts);
var(pLong, qLong) = Factorizer.Factorize((ulong)pq.LongValue);
var p = new BigInteger(pLong);
var q = new BigInteger(qLong);
var pqInnerData = new PqInnerData.DefaultTag(
pq: resPq.Pq,
p: p.ToByteArrayUnsigned().ToBytesUnsafe(),
q: q.ToByteArrayUnsigned().ToBytesUnsafe(),
nonce: resPq.Nonce,
serverNonce: resPq.ServerNonce,
newNonce: newNonce
);
var pqInnerDataBts = Serialize((PqInnerData)pqInnerData);
var fingerprint = resPq.ServerPublicKeyFingerprints.TryFind(x => x == TgServerRsaKey.Fingerprint)
?? throw Helpers.FailedAssertion(
$"auth step2: can not find a key for fingerprints: {string.Join(", ", resPq.ServerPublicKeyFingerprints.Select(x => x.ToString("x16")))}"
);
var cipherText = Rsa.Encrypt(TgServerRsaKey.Key, pqInnerDataBts);
var resp = await transport.Call(new ReqDhParams(
nonce : pqInnerData.Nonce,
serverNonce : pqInnerData.ServerNonce,
p : pqInnerData.P,
q : pqInnerData.Q,
publicKeyFingerprint : fingerprint,
encryptedData : cipherText.ToBytesUnsafe()
)).ConfigureAwait(false);
var res = resp.Match(
okTag: x => x,
failTag: _ => throw Helpers.FailedAssertion("auth step2: server_DH_params_fail")
);
Helpers.Assert(res.Nonce == pqInnerData.Nonce, "auth step2: invalid nonce");
Helpers.Assert(res.ServerNonce == pqInnerData.ServerNonce, "auth step2: invalid server nonce");
return(new Step2Result(res, newNonce));
}
public static Dictionary <long, Factorization> Of(IEnumerable <long> numbers)
{
return(Factorizer.Factorize(numbers));
}
public static Factorization Of(long number)
{
return(Factorizer.Factorize(number));
}