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Port to Windows Runtime #17

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john-peterson wants to merge 4 commits into from
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Port to Windows Runtime #17

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f761cde
Port to Windows Runtime
john-peterson Mar 10, 2015
e00f52b
Change from vector to Array in WinRT random device
john-peterson Mar 10, 2015
b7e6707
Remove WinRT macro from config
john-peterson Mar 11, 2015
fea49e7
Fix non-WinRT builds
john-peterson Mar 13, 2015
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35 changes: 32 additions & 3 deletions src/random_device.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -26,12 +26,26 @@
const bool boost::random::random_device::has_fixed_range;
#endif

// WinRT target.
#if !defined(BOOST_RANDOM_WINDOWS_RUNTIME)
# if defined(__cplusplus_winrt)
# include <winapifamily.h>
# if WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP)
# define BOOST_RANDOM_WINDOWS_RUNTIME 1
# endif
# endif
#endif

#if defined(BOOST_WINDOWS)

#if !defined(BOOST_RANDOM_WINDOWS_RUNTIME)
#include <windows.h>
#include <wincrypt.h>
#include <stdexcept> // std::invalid_argument
#else
using namespace Platform;
using namespace Windows::Security::Cryptography;
#endif

#define BOOST_AUTO_LINK_NOMANGLE
#define BOOST_LIB_NAME "Advapi32"
Expand Down Expand Up @@ -59,15 +73,18 @@ CryptEnumProvidersA(
#endif

namespace {

#if !defined(BOOST_RANDOM_WINDOWS_RUNTIME)
const char * const default_token = MS_DEF_PROV_A;

#else
const char * const default_token = "";
#endif
}

class boost::random::random_device::impl
{
public:
impl(const std::string & token) : provider(token) {
#if !defined(BOOST_RANDOM_WINDOWS_RUNTIME)
char buffer[80];
DWORD type;
DWORD len;
Expand All @@ -88,24 +105,35 @@ class boost::random::random_device::impl
CRYPT_VERIFYCONTEXT | CRYPT_SILENT)) {
error("Could not acquire CSP context");
}
#endif
}

#if !defined(BOOST_RANDOM_WINDOWS_RUNTIME)
~impl() {
if(!CryptReleaseContext(hProv, 0)) error("Could not release CSP context");
}
#endif

unsigned int next() {
unsigned int result;

#if !defined(BOOST_RANDOM_WINDOWS_RUNTIME)
if(!CryptGenRandom(hProv, sizeof(result),
static_cast<BYTE*>(static_cast<void*>(&result)))) {
error("error while reading");
}
#else
auto buffer = CryptographicBuffer::GenerateRandom(sizeof(result));
auto data = ref new Array<unsigned char>(buffer->Length);
CryptographicBuffer::CopyToByteArray(buffer, &data);
memcpy(&result, data->begin(), data->end() - data->begin());
#endif

return result;
}

private:
#if !defined(BOOST_RANDOM_WINDOWS_RUNTIME)
void error(const char * msg) {
DWORD error_code = GetLastError();
boost::throw_exception(
Expand All @@ -114,8 +142,9 @@ class boost::random::random_device::impl
std::string("boost::random_device: ") + msg +
" Cryptographic Service Provider " + provider));
}
const std::string provider;
HCRYPTPROV hProv;
#endif
const std::string provider;
};

#else
Expand Down