68 lines
2.0 KiB
Diff
68 lines
2.0 KiB
Diff
diff --git a/CMakeLists.txt b/CMakeLists.txt
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--- a/CMakeLists.txt
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+++ b/CMakeLists.txt
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@@ -22,8 +22,10 @@
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#-----------------------------------------------------------------------------
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include(GNUInstallDirs)
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include(CheckIPOSupported)
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include(CMakePackageConfigHelpers)
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+include(CMakePushCheckState)
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+include(CheckSymbolExists)
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# default is "No tests"
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option(BUILD_TESTING "" OFF)
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include(CTest)
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include(sources.cmake)
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@@ -118,8 +120,19 @@
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target_link_options(${PROJECT_NAME} BEFORE PRIVATE
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${LTM_LD_FLAGS}
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)
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+if(MSVC)
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+ cmake_push_check_state()
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+ set(CMAKE_REQUIRED_LIBRARIES bcrypt)
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+ check_symbol_exists(BCryptGenRandom "Windows.h;bcrypt.h" BCRYPT_AVAILABLE)
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+ cmake_pop_check_state()
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+ if(BCRYPT_AVAILABLE)
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+ target_compile_definitions(${PROJECT_NAME} PRIVATE LTM_WIN32_BCRYPT)
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+ target_link_libraries(${PROJECT_NAME} PRIVATE bcrypt)
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+ endif()
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+endif()
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+
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set(PUBLIC_HEADERS tommath.h)
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set(C89 False CACHE BOOL "(Usually maintained automatically) Enable when the library is in c89 mode to package the correct header files on install")
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if(C89)
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list(APPEND PUBLIC_HEADERS tommath_c89.h)
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diff --git a/bn_s_mp_rand_platform.c b/bn_s_mp_rand_platform.c
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--- a/bn_s_mp_rand_platform.c
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+++ b/bn_s_mp_rand_platform.c
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@@ -28,8 +28,19 @@
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#endif
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#define WIN32_LEAN_AND_MEAN
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#include <windows.h>
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+
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+#ifdef LTM_WIN32_BCRYPT
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+#include <bcrypt.h>
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+#pragma comment(lib, "bcrypt")
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+
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+static mp_err s_read_wincsp(void *p, size_t n)
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+{
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+ return BCRYPT_SUCCESS(BCryptGenRandom(NULL, (PUCHAR)p, (ULONG)n,
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+ BCRYPT_USE_SYSTEM_PREFERRED_RNG)) ? MP_OKAY : MP_ERR;
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+}
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+#else
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#include <wincrypt.h>
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static mp_err s_read_wincsp(void *p, size_t n)
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{
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@@ -45,8 +56,9 @@
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hProv = h;
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}
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return CryptGenRandom(hProv, (DWORD)n, (BYTE *)p) == TRUE ? MP_OKAY : MP_ERR;
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}
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+#endif
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#endif /* WIN32 */
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#if !defined(BN_S_READ_WINCSP_C) && defined(__linux__) && defined(__GLIBC_PREREQ)
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#if __GLIBC_PREREQ(2, 25)
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