tdlight/td/mtproto/ProxySecret.h

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//
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// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2023
//
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
//
#pragma once
#include "td/utils/common.h"
#include "td/utils/Slice.h"
#include "td/utils/Status.h"
namespace td {
namespace mtproto {
class ProxySecret {
public:
static constexpr size_t MAX_DOMAIN_LENGTH = 182; // must be small enough to not overflow TLS-hello length
static Result<ProxySecret> from_link(Slice encoded_secret, bool truncate_if_needed = false);
static Result<ProxySecret> from_binary(Slice raw_unchecked_secret, bool truncate_if_needed = false);
static ProxySecret from_raw(Slice raw_secret) {
ProxySecret result;
result.secret_ = raw_secret.str();
return result;
}
Slice get_raw_secret() const {
return secret_;
}
Slice get_proxy_secret() const {
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Slice proxy_secret(secret_);
if (proxy_secret.size() >= 17) {
return proxy_secret.substr(1, 16);
}
return proxy_secret;
}
string get_encoded_secret() const;
bool use_random_padding() const {
return secret_.size() >= 17;
}
bool emulate_tls() const {
return secret_.size() >= 17 && static_cast<unsigned char>(secret_[0]) == 0xee;
}
string get_domain() const {
CHECK(emulate_tls());
return secret_.substr(17);
}
private:
friend bool operator==(const ProxySecret &lhs, const ProxySecret &rhs) {
return lhs.secret_ == rhs.secret_;
}
string secret_;
};
inline bool operator!=(const ProxySecret &lhs, const ProxySecret &rhs) {
return !(lhs == rhs);
}
} // namespace mtproto
} // namespace td