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Code Issues Releases Wiki Activity

Added WebSocket masking.

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This commit is contained in:
Ylian Saint-Hilaire
2021-06-09 22:33:58 -07:00
parent 91432389b8
commit 3b720c081b
1 changed files with 7 additions and 0 deletions
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7
WebSocketClient.cs
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@@ -62,6 +62,7 @@ namespace MeshCentralRouter
public long PendingSendLength { get { return (pendingSendBuffer == null)? 0 : pendingSendBuffer.Length; } } public long PendingSendLength { get { return (pendingSendBuffer == null)? 0 : pendingSendBuffer.Length; } }
private bool readPaused = false; private bool readPaused = false;
private bool shouldRead = false; private bool shouldRead = false;
private RNGCryptoServiceProvider CryptoRandom = new RNGCryptoServiceProvider();
// Outside variables // Outside variables
public object tag = null; public object tag = null;
@@ -644,6 +645,12 @@ namespace MeshCentralRouter
// Check that everything is ok // Check that everything is ok
if (len < 0) { Dispose(); return 0; } if (len < 0) { Dispose(); return 0; }
// Set the mask to a cryptographic random value and XOR the data
byte[] rand = new byte[4];
CryptoRandom.GetBytes(rand);
Array.Copy(rand, 0, buf, 10, 4);
for (int x = 0; x < len; x++) { buf[x + 14] ^= rand[x % 4]; }
if (len < 126) if (len < 126)
{ {
// Small fragment // Small fragment