Fix Windows XP support on Visual Studio 2015+ (#439)

When compiling with Visual Studio 2015+, Crypto++ uses CryptoNG by
default. CryptoNG is only available on Windows Vista and later and
Crypto++ currently ignores if the user explicitly wants to target
Windows XP. Unlike with other Windows SDK features, everything
compiles, but the application doesn't start on Windows XP because
bcrypt.dll is missing. That is an issue when updating Visual Studio
because the root cause is hard to find.
Making use of CryptoNG when targeting Windows 8+ instead by default,
regardless of the Visual Studio version, to fix this.
This commit is contained in:
Marcel Raad 2017-06-24 23:41:20 +02:00 committed by Jeffrey Walton
parent aaf62695fc
commit 32f715f1d7

View File

@ -44,10 +44,10 @@
// This macro will be ignored if NO_OS_DEPENDENCE is defined.
// #define USE_MS_CNGAPI
// If the user did not make a choice, then select CryptoNG if either
// Visual Studio 2015 is available, or Windows 10 or above is available.
// If the user did not make a choice, then select CryptoNG if
// targeting Windows 8 or above.
#if !defined(USE_MS_CRYPTOAPI) && !defined(USE_MS_CNGAPI)
# if (_MSC_VER >= 1900) || ((WINVER >= 0x0A00 /*_WIN32_WINNT_WIN10*/) || (_WIN32_WINNT >= 0x0A00 /*_WIN32_WINNT_WIN10*/))
# if !defined(_USING_V110_SDK71_) && ((WINVER >= 0x0602 /*_WIN32_WINNT_WIN8*/) || (_WIN32_WINNT >= 0x0602 /*_WIN32_WINNT_WIN8*/))
# define USE_MS_CNGAPI
# else
# define USE_MS_CRYPTOAPI