From 6b5634b96aa90ab2db7357b353fc8f96ad4878c5 Mon Sep 17 00:00:00 2001 From: Fabio Alessandrelli Date: Mon, 7 Feb 2022 17:33:55 +0100 Subject: [OS/Crypto] Add get_entropy to OS. Implemented via `BCryptGenRandom` on Windows. Implemented via `getentropy` syscall when available. Implemented via `/dev/urandom` device as a fallback. The `/dev/urandom` fallback can be disabled via the `NO_URANDOM` build flag. Note: The HTML5 version relies on emscripten file system urandom device which itself uses the Crypto API when available or the plain old not crypto-safe `Math.random()` otherwise. Restore get_entropy. --- platform/windows/os_windows.cpp | 7 +++++++ platform/windows/os_windows.h | 2 ++ 2 files changed, 9 insertions(+) (limited to 'platform/windows') diff --git a/platform/windows/os_windows.cpp b/platform/windows/os_windows.cpp index d844531071..59f55b5dd2 100644 --- a/platform/windows/os_windows.cpp +++ b/platform/windows/os_windows.cpp @@ -46,6 +46,7 @@ #include "windows_terminal_logger.h" #include +#include #include #include #include @@ -192,6 +193,12 @@ void OS_Windows::finalize_core() { NetSocketPosix::cleanup(); } +Error OS_Windows::get_entropy(uint8_t *r_buffer, int p_bytes) { + NTSTATUS status = BCryptGenRandom(nullptr, r_buffer, p_bytes, BCRYPT_USE_SYSTEM_PREFERRED_RNG); + ERR_FAIL_COND_V(status, FAILED); + return OK; +} + Error OS_Windows::open_dynamic_library(const String p_path, void *&p_library_handle, bool p_also_set_library_path) { String path = p_path.replace("/", "\\"); diff --git a/platform/windows/os_windows.h b/platform/windows/os_windows.h index 0a11416b1b..bde663a27b 100644 --- a/platform/windows/os_windows.h +++ b/platform/windows/os_windows.h @@ -106,6 +106,8 @@ protected: public: virtual void alert(const String &p_alert, const String &p_title = "ALERT!") override; + virtual Error get_entropy(uint8_t *r_buffer, int p_bytes) override; + virtual Error open_dynamic_library(const String p_path, void *&p_library_handle, bool p_also_set_library_path = false) override; virtual Error close_dynamic_library(void *p_library_handle) override; virtual Error get_dynamic_library_symbol_handle(void *p_library_handle, const String p_name, void *&p_symbol_handle, bool p_optional = false) override; -- cgit v1.2.3