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the socks are almost done

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fucking finally
This commit is contained in:
Malloc of Kuzkycyziklistan 2017-05-01 16:04:34 -05:00
parent c204d1ded5
commit a9bf7201c9
5 changed files with 118 additions and 56 deletions
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1
client/src/FileCache.ts
View file

@ -14,5 +14,4 @@ class FileCache {
}
}
static
}

11
server/Kneesocks/Connection.cs
View file

@ -37,18 +37,19 @@ namespace Kneesocks {
}
public void Disconnect(string reason = null) {
Disconnect(Frame.kClosingReason.Normal, reason);
}
public void Disconnect(Frame.kClosingReason status, string reason = null) {
Disconnected = true;
DisconnectReason = reason;
if(Socket.Connected) {
Socket.SendTimeout = 1000;
if(!Handshaked) {
var raw = Encoding.ASCII.GetBytes(Handshake.DenyRequest().GetRaw());
var raw = Handshaked ? Frame.Closing(status, reason).GetBytes()
: Handshake.DenyRequest().ToString().GetBytes();
Stream.Write(raw, 0, raw.Length);
Socket.Close();
} else {
}
}
OnClose();

128
server/Kneesocks/Frame.cs
View file

@ -6,6 +6,17 @@ using System.Threading.Tasks;
namespace Kneesocks {
public class Frame {
public enum kClosingReason {
Normal = 1000,
GoingAway = 1001,
ProtocolError = 1002,
FrameTypeError = 1003,
DataError = 1007,
PolicyError = 1008,
FrameTooBig = 1009,
RequestError = 1011
}
public enum kOpcode {
Continuation = 0x0,
TextFrame = 0x1,
@ -15,44 +26,63 @@ namespace Kneesocks {
Pong = 0xA
};
public kOpcode Opcode { get; set; }
public bool IsFinal { get; set; }
public bool IsMasked { get; set; }
public kOpcode Opcode { get; set; } = kOpcode.BinaryFrame;
public bool IsFinal { get; set; } = true;
public bool IsMasked { get; set; } = false;
public byte[] Mask { get; set; } = new byte[] { 0, 0, 0, 0 };
public byte Reserved { get; set; }
public byte Reserved { get; set; } = 0;
public byte[] Content { get; set; }
public byte[] MaskedContent {
get {
byte[] returnValue = new byte[Content.Length];
for(long i = 0; i < Content.LongLength; ++i)
returnValue[i] = (byte)(Content[i] ^ Mask[i % 4]);
return returnValue;
long counter = 0;
return Content.Select(x => (byte)(x ^ Mask[counter++ % 4])).ToArray();
}
}
public byte[] GetRaw() {
public byte[] GetBytes() {
var headerSize = 2L;
var bodySize = Content.LongLength;
if(bodySize >= 0x7E && bodySize <= 0xFFFF)
var headerLengthFirstByte = (byte)Content.Length;
if(bodySize >= 0x7E && bodySize <= 0xFFFF) {
headerSize += 2;
else if(bodySize > 0xFFFF)
headerLengthFirstByte = 126;
} else if(bodySize > 0xFFFF) {
headerSize += 8;
headerLengthFirstByte = 127;
}
var headerLengthSize = (int)headerSize - 1;
if(IsMasked)
headerSize += 4;
var returnValue = new byte[headerSize + bodySize];
returnValue[0] = (byte)(((byte)Opcode % 0x10)
| ((Reserved % 8) << 4)
| (IsFinal ? 0x80 : 0x0));
returnValue[1] = (byte)(headerLengthFirstByte
| (IsMasked ? 0x80 : 0x0));
if(headerLengthFirstByte >= 0x7E) {
var upperBound = headerLengthFirstByte == 0x7E ? 2 : 8;
for(var i = 0; i < upperBound; ++i)
returnValue[2 + i] |= (byte)((bodySize >> (8*(upperBound - i))) & 0xFF);
}
if(IsMasked)
Array.Copy(Mask, 0, returnValue, headerSize - 4, 4);
Array.Copy(IsMasked ? MaskedContent : Content, 0L, returnValue, headerSize, Content.LongLength);
return returnValue;
}
public static Frame FromRaw(byte[] raw) {
public static Frame FromBytes(byte[] raw) {
if(raw.Length < 2)
throw new FormatException("Websocket frame cannot be less than two bytes long");
var rawOpcode = raw[0] & 0x0F;
if(!Enum.IsDefined(typeof(kOpcode), rawOpcode))
throw new FormatException("Opcode '"+ rawOpcode.ToString("0x{0:X}") +"' not understood");
throw new FormatException("Opcode '0x"+ rawOpcode.ToString("X") +"' not understood");
var returnFrame = new Frame {
IsFinal = (raw[0] & 0x80) != 0,
@ -62,41 +92,63 @@ namespace Kneesocks {
};
ulong bodyLength = raw[1] & 0x7Ful;
int lengthOffset =
bodyLength < 126
int headerOffset =
bodyLength < 0x7E
? 1
: (bodyLength == 126 ? 3 : 9);
: (bodyLength == 0x7E ? 3 : 9);
for(var i = lengthOffset - 1; i > 0; --i) {
var bytePos = lengthOffset - 1 - i;
bodyLength &= 0xFFul << bytePos;
bodyLength |= (ulong)raw[2 + i] << bytePos;
}
if(raw.Length < headerOffset + 1)
throw new FormatException("Websocket frame is smaller than expected header size");
bodyLength = bodyLength < 0x7E ? 0 : bodyLength;
for(var i = headerOffset - 1; i > 0; --i)
bodyLength |= (ulong)raw[2 + i] << (8*(headerOffset - 1 - i));
if(returnFrame.IsMasked) {
for(var i = 0; i < 4; ++i)
returnFrame.Mask[i] = raw[i + 1 + lengthOffset];
lengthOffset += 4;
Array.Copy(raw, headerOffset + 1, returnFrame.Mask, 0, 4);
headerOffset += 4;
}
ulong expectedFrameLength = bodyLength + (uint)lengthOffset + 1;
ulong expectedFrameLength = bodyLength + (uint)headerOffset + 1;
if(expectedFrameLength < (ulong)raw.LongLength)
throw new FormatException("Raw frame length ("+ expectedFrameLength +") is less than described size ("+ (ulong)raw.LongLength +")");
throw new FormatException("Raw frame length ("+ (ulong)raw.LongLength + ") is less than described size ("+ expectedFrameLength + ")");
ulong counter = 0;
returnFrame.Content = raw.Skip(lengthOffset + 1)
.TakeWhile(x => counter++ < bodyLength)
.ToArray();
if(returnFrame.IsMasked) {
counter = 0;
returnFrame.Content =
returnFrame.Content.Select(
x => (byte)(x ^ returnFrame.Mask[counter++ % 4])
).ToArray();
}
Array.Copy(raw, headerOffset + 1, returnFrame.Content, 0L, (long)bodyLength);
if(returnFrame.IsMasked)
returnFrame.Content = returnFrame.MaskedContent;
return returnFrame;
}
public static Frame Closing(kClosingReason status = kClosingReason.Normal, string reason = "") {
var data = new byte[2 + reason.ByteLength()];
data[0] = (byte)(((short)status >> 8) & 0xFF);
data[1] = (byte)((short)status & 0xFF);
Array.Copy(reason.GetBytes(), 0, data, 2, reason.ByteLength());
return new Frame {
Opcode = kOpcode.Close,
Content = data
};
}
public static Frame Ping(string data = "") {
return new Frame {
Opcode = kOpcode.Ping,
Content = data.GetBytes()
};
}
public static Frame Pong(string data = "") {
return new Frame {
Opcode = kOpcode.Pong,
Content = data.GetBytes()
};
}
public static Frame Pong(Frame pingFrame) {
pingFrame.Opcode = kOpcode.Pong;
return pingFrame;
}
}
}

4
server/Kneesocks/Handshake.cs
View file

@ -99,9 +99,9 @@ namespace Kneesocks {
return new Handshake(statusCode, message);
}
public string GetRaw() {
public override string ToString() {
if(Content != null) {
SetHeader("Content-Length", Encoding.ASCII.GetByteCount(Content).ToString());
SetHeader("Content-Length", Content.ByteLength().ToString());
if(GetHeader("Content-Type") == null)
SetHeader("Content-Type", "text/plain");
}

14
server/Kneesocks/Utilities.cs
View file

@ -10,6 +10,16 @@ namespace Kneesocks {
RAW, HEX, BASE64
}
public static byte[] GetBytes(this string str, bool isUtf8 = true) {
return isUtf8 ? Encoding.UTF8.GetBytes(str)
: Encoding.ASCII.GetBytes(str);
}
public static int ByteLength(this string str, bool isUtf8 = true) {
return isUtf8 ? Encoding.UTF8.GetByteCount(str)
: Encoding.ASCII.GetByteCount(str);
}
public static string Base64Encode(this string str, bool isUtf8 = true) {
var raw =
isUtf8 ? Encoding.UTF8.GetBytes(str)
@ -26,7 +36,7 @@ namespace Kneesocks {
public static string SHA1(this string str, kHashReturnType type = kHashReturnType.RAW) {
using(var hasher = System.Security.Cryptography.SHA1.Create()) {
return ParseRawHash(
hasher.ComputeHash(Encoding.ASCII.GetBytes(str)),
hasher.ComputeHash(str.GetBytes(false)),
type
);
}
@ -35,7 +45,7 @@ namespace Kneesocks {
public static string MD5(this string str, kHashReturnType type = kHashReturnType.RAW) {
using(var hasher = System.Security.Cryptography.MD5.Create()) {
return ParseRawHash(
hasher.ComputeHash(Encoding.ASCII.GetBytes(str)),
hasher.ComputeHash(str.GetBytes(false)),
type
);
}