init

Telegram/SourceFiles/mtproto/mtproto_dh_utils.h

@@ -0,0 +1,38 @@
+/*
+This file is part of Telegram Desktop,
+the official desktop application for the Telegram messaging service.
+
+For license and copyright information please follow this link:
+https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
+*/
+#pragma once
+
+#include "base/bytes.h"
+
+namespace openssl {
+class BigNum;
+} // namespace openssl
+
+namespace MTP {
+
+struct ModExpFirst {
+	static constexpr auto kRandomPowerSize = 256;
+
+	bytes::vector modexp;
+	bytes::vector randomPower;
+};
+
+[[nodiscard]] bool IsPrimeAndGood(bytes::const_span primeBytes, int g);
+[[nodiscard]] bool IsGoodModExpFirst(
+	const openssl::BigNum &modexp,
+	const openssl::BigNum &prime);
+[[nodiscard]] ModExpFirst CreateModExp(
+	int g,
+	bytes::const_span primeBytes,
+	bytes::const_span randomSeed);
+[[nodiscard]] bytes::vector CreateAuthKey(
+	bytes::const_span firstBytes,
+	bytes::const_span randomBytes,
+	bytes::const_span primeBytes);
+
+} // namespace MTP