mirror of
https://github.com/RGBCube/serenity
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120 lines
3.5 KiB
C++
120 lines
3.5 KiB
C++
/*
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* Copyright (c) 2020, Ali Mohammad Pur <ali.mpfard@gmail.com>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include <AK/ByteBuffer.h>
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#include <AK/Endian.h>
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#include <AK/Types.h>
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namespace TLS {
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enum class MessageType : u8 {
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ChangeCipher = 0x14,
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Alert = 0x15,
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Handshake = 0x16,
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ApplicationData = 0x17,
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};
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enum class Version : u16 {
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V10 = 0x0301,
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V11 = 0x0302,
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V12 = 0x0303,
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V13 = 0x0304
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};
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class PacketBuilder {
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public:
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PacketBuilder(MessageType type, u16 version, size_t size_hint = 0xfdf)
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: PacketBuilder(type, (Version)version, size_hint)
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{
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}
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PacketBuilder(MessageType type, Version version, size_t size_hint = 0xfdf)
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{
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m_packet_data = ByteBuffer::create_uninitialized(size_hint + 16);
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m_current_length = 5;
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m_packet_data[0] = (u8)type;
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*(u16*)m_packet_data.offset_pointer(1) = AK::convert_between_host_and_network_endian((u16)version);
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}
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inline void append(u16 value)
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{
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value = AK::convert_between_host_and_network_endian(value);
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append((const u8*)&value, sizeof(value));
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}
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inline void append(u8 value)
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{
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append((const u8*)&value, sizeof(value));
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}
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inline void append(ReadonlyBytes data)
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{
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append(data.data(), data.size());
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}
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inline void append_u24(u32 value)
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{
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u8 buf[3];
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buf[0] = value / 0x10000;
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value %= 0x10000;
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buf[1] = value / 0x100;
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value %= 0x100;
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buf[2] = value;
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append(buf, 3);
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}
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inline void append(const u8* data, size_t bytes)
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{
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if (bytes == 0)
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return;
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auto old_length = m_current_length;
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m_current_length += bytes;
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if (m_packet_data.size() < m_current_length) {
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m_packet_data.grow(m_current_length);
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}
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m_packet_data.overwrite(old_length, data, bytes);
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}
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inline ByteBuffer build()
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{
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auto length = m_current_length;
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m_current_length = 0;
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return m_packet_data.slice(0, length);
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}
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inline void set(size_t offset, u8 value)
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{
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ASSERT(offset < m_current_length);
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m_packet_data[offset] = value;
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}
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size_t length() const { return m_current_length; }
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private:
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ByteBuffer m_packet_data;
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size_t m_current_length;
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};
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}
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