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LibTLS+RequestServer: Add an option to dump TLS keys to a log file

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This file allows us to decrypt TLS messages in wireshark, which can help
immensely in debugging network stuff :^)
This commit is contained in:
Ali Mohammad Pur 2022-02-09 23:12:56 +03:30 committed by Andreas Kling
parent a796207b9f
commit cb7becb067
Notes: sideshowbarker 2024-07-17 19:05:53 +09:00 
Author: https://github.com/alimpfard
Commit: https://github.com/SerenityOS/serenity/commit/cb7becb067
Pull-request: https://github.com/SerenityOS/serenity/pull/12394
4 changed files with 28 additions and 2 deletions
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4
AK/Debug.h.in
View file

@ -434,6 +434,10 @@
#cmakedefine01 TLS_DEBUG
#endif
#ifndef TLS_SSL_KEYLOG_DEBUG
#cmakedefine01 TLS_SSL_KEYLOG_DEBUG
#endif
#ifndef TOKENIZER_TRACE_DEBUG
#cmakedefine01 TOKENIZER_TRACE_DEBUG
#endif

1
Meta/CMake/all_the_debug_macros.cmake
View file

@ -182,6 +182,7 @@ set(TERMINAL_DEBUG ON)
set(TEXTEDITOR_DEBUG ON)
set(THREAD_DEBUG ON)
set(TLS_DEBUG ON)
set(TLS_SSL_KEYLOG_DEBUG ON)
set(TOKENIZER_TRACE_DEBUG ON)
set(TTY_DEBUG ON)
set(UCI_DEBUG ON)

11
Userland/Libraries/LibTLS/HandshakeClient.cpp
View file

@ -5,6 +5,7 @@
*/
#include <AK/Debug.h>
#include <AK/Hex.h>
#include <AK/Random.h>
#include <LibCrypto/ASN1/DER.h>
#include <LibCrypto/BigInt/UnsignedBigInteger.h>
@ -136,6 +137,16 @@ bool TLSv12::compute_master_secret_from_pre_master_secret(size_t length)
dbgln("master key:");
print_buffer(m_context.master_key);
}
if constexpr (TLS_SSL_KEYLOG_DEBUG) {
auto file = MUST(Core::Stream::File::open("/home/anon/ssl_keylog", Core::Stream::OpenMode::Append | Core::Stream::OpenMode::Write));
VERIFY(file->write_or_error("CLIENT_RANDOM "sv.bytes()));
VERIFY(file->write_or_error(encode_hex({ m_context.local_random, 32 }).bytes()));
VERIFY(file->write_or_error(" "sv.bytes()));
VERIFY(file->write_or_error(encode_hex(m_context.master_key).bytes()));
VERIFY(file->write_or_error("\n"sv.bytes()));
}
expand_key();
return true;
}

14
Userland/Services/RequestServer/main.cpp
View file

@ -19,9 +19,17 @@
ErrorOr<int> serenity_main(Main::Arguments)
{
TRY(Core::System::pledge("stdio inet accept unix rpath sendfd recvfd sigaction"));
if constexpr (TLS_SSL_KEYLOG_DEBUG)
TRY(Core::System::pledge("stdio inet accept unix cpath wpath rpath sendfd recvfd sigaction"));
else
TRY(Core::System::pledge("stdio inet accept unix rpath sendfd recvfd sigaction"));
signal(SIGINFO, [](int) { RequestServer::ConnectionCache::dump_jobs(); });
TRY(Core::System::pledge("stdio inet accept unix rpath sendfd recvfd"));
if constexpr (TLS_SSL_KEYLOG_DEBUG)
TRY(Core::System::pledge("stdio inet accept unix cpath wpath rpath sendfd recvfd"));
else
TRY(Core::System::pledge("stdio inet accept unix rpath sendfd recvfd"));
// Ensure the certificates are read out here.
[[maybe_unused]] auto& certs = DefaultRootCACertificates::the();
@ -30,6 +38,8 @@ ErrorOr<int> serenity_main(Main::Arguments)
// FIXME: Establish a connection to LookupServer and then drop "unix"?
TRY(Core::System::unveil("/tmp/portal/lookup", "rw"));
TRY(Core::System::unveil("/etc/timezone", "r"));
if constexpr (TLS_SSL_KEYLOG_DEBUG)
TRY(Core::System::unveil("/home/anon", "rwc"));
TRY(Core::System::unveil(nullptr, nullptr));
[[maybe_unused]] auto gemini = make<RequestServer::GeminiProtocol>();