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// Copyright 2015 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef NET_SSL_SSL_KEY_LOGGER_H_
#define NET_SSL_SSL_KEY_LOGGER_H_
#include <memory>
#include <string>
#include "base/no_destructor.h"
#include "net/base/net_export.h"
#include "third_party/boringssl/src/include/openssl/ssl.h"
namespace net {
// SSLKeyLogger logs SSL key material for debugging purposes. This should only
// be used when requested by the user, typically via the SSLKEYLOGFILE
// environment variable. See also
// https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/Key_Log_Format.
class NET_EXPORT SSLKeyLogger {
public:
virtual ~SSLKeyLogger() = default;
// Writes |line| followed by a newline. This may be called by multiple threads
// simultaneously. If two calls race, the order of the lines is undefined, but
// each line will be written atomically.
virtual void WriteLine(const std::string& line) = 0;
};
// SSLKeyLoggerManager owns a single global instance of SSLKeyLogger, allowing
// it to safely be registered on multiple SSL_CTX instances.
class NET_EXPORT SSLKeyLoggerManager {
public:
~SSLKeyLoggerManager() = delete;
SSLKeyLoggerManager(const SSLKeyLoggerManager&) = delete;
SSLKeyLoggerManager& operator=(const SSLKeyLoggerManager&) = delete;
// Returns true if an SSLKeyLogger has been set.
static bool IsActive();
// Set the SSLKeyLogger to use.
static void SetSSLKeyLogger(std::unique_ptr<SSLKeyLogger> logger);
// Logs |line| to the |logger| that was registered with SetSSLKeyLogger.
// This function will crash if a logger has not been registered.
// The function signature allows it to be registered with
// SSL_CTX_set_keylog_callback, the |ssl| parameter is unused.
static void KeyLogCallback(const SSL* /*ssl*/, const char* line);
private:
friend base::NoDestructor<SSLKeyLoggerManager>;
SSLKeyLoggerManager();
// Get the global SSLKeyLoggerManager instance.
static SSLKeyLoggerManager* Get();
std::unique_ptr<SSLKeyLogger> ssl_key_logger_;
};
} // namespace net
#endif // NET_SSL_SSL_KEY_LOGGER_H_
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