Implement it with CryptGenRandom, which is implemented with other WinRT APIs in winstorecompat.
This is only needed if wanting to run on versions older than 10.0.18362.0. Signed-off-by: Martin Storsjö <[email protected]> --- .../winstorecompat/Makefile.am | 2 + .../winstorecompat/src/SystemFunction036.c | 52 +++++++++++++++++++ 2 files changed, 54 insertions(+) create mode 100644 mingw-w64-libraries/winstorecompat/src/SystemFunction036.c diff --git a/mingw-w64-libraries/winstorecompat/Makefile.am b/mingw-w64-libraries/winstorecompat/Makefile.am index e3044708f..8b3312312 100644 --- a/mingw-w64-libraries/winstorecompat/Makefile.am +++ b/mingw-w64-libraries/winstorecompat/Makefile.am @@ -45,6 +45,7 @@ libwinstorecompat_a_SOURCES = \ src/GetUserName.c \ src/getpid.c \ src/GetFileInformationByHandle.c \ + src/SystemFunction036.c \ $(NULL) libwindowsappcompat_a_SOURCES = \ @@ -68,5 +69,6 @@ libwindowsappcompat_a_SOURCES = \ src/GetUserName.c \ src/getpid.c \ src/GetFileInformationByHandle.c \ + src/SystemFunction036.c \ $(NULL) libwindowsappcompat_a_CFLAGS = $(AM_CFLAGS) -D_WIN32_WINNT=_WIN32_WINNT_WIN10 diff --git a/mingw-w64-libraries/winstorecompat/src/SystemFunction036.c b/mingw-w64-libraries/winstorecompat/src/SystemFunction036.c new file mode 100644 index 000000000..8ee0fe444 --- /dev/null +++ b/mingw-w64-libraries/winstorecompat/src/SystemFunction036.c @@ -0,0 +1,52 @@ +/* + Copyright (c) 2022 mingw-w64 project + + Contributing authors: Martin Storsjo + + Permission is hereby granted, free of charge, to any person obtaining a + copy of this software and associated documentation files (the "Software"), + to deal in the Software without restriction, including without limitation + the rights to use, copy, modify, merge, publish, distribute, sublicense, + and/or sell copies of the Software, and to permit persons to whom the + Software is furnished to do so, subject to the following conditions: + + The above copyright notice and this permission notice shall be included in + all copies or substantial portions of the Software. + + THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER + DEALINGS IN THE SOFTWARE. +*/ + +#define SystemFunction036 __SystemFunction036 +#include <windows.h> +#include <ntsecapi.h> +#include <wincrypt.h> +#undef SystemFunction036 + +// This is the underlying function name for the RtlGenRandom function. +// Since 10.0.18362.0, this function is available to link against and allowed. +BOOLEAN WINAPI SystemFunction036(PVOID RandomBuffer, ULONG RandomBufferLength) +{ + // Emulate RtlGenRandom with CryptGenRandom; that function in itself + // isn't allowed either, but is also wrapped by winstorecompat. + HCRYPTPROV crypt; + BOOLEAN ret = FALSE; + + if (CryptAcquireContextW(&crypt, NULL, NULL, PROV_RSA_FULL, + CRYPT_VERIFYCONTEXT | CRYPT_SILENT)) { + ret = CryptGenRandom(crypt, RandomBufferLength, RandomBuffer); + CryptReleaseContext(crypt, 0); + } + return ret; +} + +#ifdef _X86_ +BOOLEAN (WINAPI *__MINGW_IMP_SYMBOL(SystemFunction036))(PVOID RandomBuffer, ULONG RandomBufferLength) __asm__("__imp__SystemFunction036@8") = SystemFunction036; +#else +BOOLEAN (WINAPI *__MINGW_IMP_SYMBOL(SystemFunction036))(PVOID RandomBuffer, ULONG RandomBufferLength) __asm__("__imp__SystemFunction036") = SystemFunction036; +#endif -- 2.25.1 _______________________________________________ Mingw-w64-public mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/mingw-w64-public
