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Add option to decrypt Quic traffic in debug builds (#83001)
* Add option to decrypt Quic traffic in debug builds * feedback from review * fixes & feedback * feedback from review
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109 changes: 109 additions & 0 deletions
109
src/libraries/System.Net.Quic/src/System/Net/Quic/Internal/MsQuicTlsSecret.cs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,109 @@ | ||
| // Licensed to the .NET Foundation under one or more agreements. | ||
| // The .NET Foundation licenses this file to you under the MIT license. | ||
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| #if DEBUG | ||
| using System.Collections.Generic; | ||
| using System.IO; | ||
| using System.Runtime.InteropServices; | ||
| using System.Text; | ||
| using System.Threading; | ||
| using Microsoft.Quic; | ||
| using static Microsoft.Quic.MsQuic; | ||
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| namespace System.Net.Quic; | ||
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| internal sealed class MsQuicTlsSecret : IDisposable | ||
| { | ||
| private static readonly string? s_keyLogFile = Environment.GetEnvironmentVariable("SSLKEYLOGFILE"); | ||
| private static readonly FileStream? s_fileStream = s_keyLogFile != null ? File.Open(s_keyLogFile, FileMode.Append, FileAccess.Write) : null; | ||
|
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| private unsafe QUIC_TLS_SECRETS* _tlsSecrets; | ||
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| public static unsafe MsQuicTlsSecret? Create(MsQuicContextSafeHandle handle) | ||
| { | ||
| if (s_fileStream != null) | ||
| { | ||
| try | ||
| { | ||
| QUIC_TLS_SECRETS* ptr = handle.GetSecretsBuffer(); | ||
| if (ptr != null) | ||
| { | ||
| int status = MsQuicApi.Api.SetParam(handle, QUIC_PARAM_CONN_TLS_SECRETS, (uint)sizeof(QUIC_TLS_SECRETS), ptr); | ||
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| if (StatusSucceeded(status)) | ||
| { | ||
| return new MsQuicTlsSecret(ptr); | ||
| } | ||
| else | ||
| { | ||
| if (NetEventSource.Log.IsEnabled()) | ||
| { | ||
| NetEventSource.Error(handle, "Failed to set native memory for TLS secret."); | ||
| } | ||
| } | ||
| } | ||
| } | ||
| catch { }; | ||
| } | ||
|
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| return null; | ||
| } | ||
|
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| private unsafe MsQuicTlsSecret(QUIC_TLS_SECRETS* memory) | ||
| { | ||
| _tlsSecrets = memory; | ||
| } | ||
|
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| public void WriteSecret() => WriteSecret(s_fileStream); | ||
| public unsafe void WriteSecret(FileStream? stream) | ||
| { | ||
| if (stream != null && _tlsSecrets != null) | ||
| { | ||
| lock (stream) | ||
| { | ||
| string clientRandom = string.Empty; | ||
|
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| if (_tlsSecrets->IsSet.ClientRandom != 0) | ||
| { | ||
| clientRandom = HexConverter.ToString(new ReadOnlySpan<byte>(_tlsSecrets->ClientRandom, 32)); | ||
| } | ||
|
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| if (_tlsSecrets->IsSet.ClientHandshakeTrafficSecret != 0) | ||
| { | ||
| stream.Write(Encoding.ASCII.GetBytes($"CLIENT_HANDSHAKE_TRAFFIC_SECRET {clientRandom} {HexConverter.ToString(new ReadOnlySpan<byte>(_tlsSecrets->ClientHandshakeTrafficSecret, _tlsSecrets->SecretLength))}\n")); | ||
| } | ||
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| if (_tlsSecrets->IsSet.ServerHandshakeTrafficSecret != 0) | ||
| { | ||
| stream.Write(Encoding.ASCII.GetBytes($"SERVER_HANDSHAKE_TRAFFIC_SECRET {clientRandom} {HexConverter.ToString(new ReadOnlySpan<byte>(_tlsSecrets->ServerHandshakeTrafficSecret, _tlsSecrets->SecretLength))}\n")); | ||
| } | ||
|
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| if (_tlsSecrets->IsSet.ClientTrafficSecret0 != 0) | ||
| { | ||
| stream.Write(Encoding.ASCII.GetBytes($"CLIENT_TRAFFIC_SECRET_0 {clientRandom} {HexConverter.ToString(new ReadOnlySpan<byte>(_tlsSecrets->ClientTrafficSecret0, _tlsSecrets->SecretLength))}\n")); | ||
| } | ||
|
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| if (_tlsSecrets->IsSet.ServerTrafficSecret0 != 0) | ||
| { | ||
| stream.Write(Encoding.ASCII.GetBytes($"SERVER_TRAFFIC_SECRET_0 {clientRandom} {HexConverter.ToString(new ReadOnlySpan<byte>(_tlsSecrets->ServerTrafficSecret0, _tlsSecrets->SecretLength))}\n")); | ||
| } | ||
|
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| if (_tlsSecrets->IsSet.ClientEarlyTrafficSecret != 0) | ||
| { | ||
| stream.Write(Encoding.ASCII.GetBytes($"CLIENT_EARLY_TRAFFIC_SECRET {clientRandom} {HexConverter.ToString(new ReadOnlySpan<byte>(_tlsSecrets->ClientEarlyTrafficSecret, _tlsSecrets->SecretLength))}\n")); | ||
| } | ||
|
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| stream.Flush(); | ||
| } | ||
| } | ||
| } | ||
|
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| public unsafe void Dispose() | ||
| { | ||
| if (_tlsSecrets != null) | ||
| { | ||
| NativeMemory.Clear(_tlsSecrets, (nuint)sizeof(QUIC_TLS_SECRETS)); | ||
| } | ||
| } | ||
| } | ||
| #endif |
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