ext-cryptopp/dll.cpp
Jeffrey Walton 5f0cbde980
Removed MSVC warning suppression for many warnings (Issue 412)
Most of these appear to have been cleared over the last couple of years.

C4127 is too prevelant. We are probably going to have to live with it.

We may be able to clear C4250 with a using statement. For example 'using ASN1CryptoMaterial::Load'.

MSVC resisted clearing C4661 by pushing/poping in iterhash.h and osrng.h. It was like MSVC simply ignored it.
2017-05-16 03:52:03 -04:00

155 lines
4.6 KiB
C++

// dll.cpp - originally written and placed in the public domain by Wei Dai
#define CRYPTOPP_MANUALLY_INSTANTIATE_TEMPLATES
#define CRYPTOPP_DEFAULT_NO_DLL
#include "dll.h"
#include "config.h"
#include "iterhash.h"
// Cast from FARPROC to funcptr with args, http://stackoverflow.com/q/4192058/608639
#pragma warning(disable: 4191)
#if defined(CRYPTOPP_EXPORTS) && defined(CRYPTOPP_WIN32_AVAILABLE)
#include <windows.h>
#endif
#ifndef CRYPTOPP_IMPORTS
NAMESPACE_BEGIN(CryptoPP)
// Guarding based on DLL due to Clang, http://github.com/weidai11/cryptopp/issues/300
#if defined(CRYPTOPP_IS_DLL)
template<> const byte PKCS_DigestDecoration<SHA1>::decoration[] = {0x30,0x21,0x30,0x09,0x06,0x05,0x2B,0x0E,0x03,0x02,0x1A,0x05,0x00,0x04,0x14};
template<> const unsigned int PKCS_DigestDecoration<SHA1>::length = sizeof(PKCS_DigestDecoration<SHA1>::decoration);
template<> const byte PKCS_DigestDecoration<SHA224>::decoration[] = {0x30,0x2d,0x30,0x0d,0x06,0x09,0x60,0x86,0x48,0x01,0x65,0x03,0x04,0x02,0x04,0x05,0x00,0x04,0x1c};
template<> const unsigned int PKCS_DigestDecoration<SHA224>::length = sizeof(PKCS_DigestDecoration<SHA224>::decoration);
template<> const byte PKCS_DigestDecoration<SHA256>::decoration[] = {0x30,0x31,0x30,0x0d,0x06,0x09,0x60,0x86,0x48,0x01,0x65,0x03,0x04,0x02,0x01,0x05,0x00,0x04,0x20};
template<> const unsigned int PKCS_DigestDecoration<SHA256>::length = sizeof(PKCS_DigestDecoration<SHA256>::decoration);
template<> const byte PKCS_DigestDecoration<SHA384>::decoration[] = {0x30,0x41,0x30,0x0d,0x06,0x09,0x60,0x86,0x48,0x01,0x65,0x03,0x04,0x02,0x02,0x05,0x00,0x04,0x30};
template<> const unsigned int PKCS_DigestDecoration<SHA384>::length = sizeof(PKCS_DigestDecoration<SHA384>::decoration);
template<> const byte PKCS_DigestDecoration<SHA512>::decoration[] = {0x30,0x51,0x30,0x0d,0x06,0x09,0x60,0x86,0x48,0x01,0x65,0x03,0x04,0x02,0x03,0x05,0x00,0x04,0x40};
template<> const unsigned int PKCS_DigestDecoration<SHA512>::length = sizeof(PKCS_DigestDecoration<SHA512>::decoration);
template<> const byte EMSA2HashId<SHA1>::id = 0x33;
template<> const byte EMSA2HashId<SHA224>::id = 0x38;
template<> const byte EMSA2HashId<SHA256>::id = 0x34;
template<> const byte EMSA2HashId<SHA384>::id = 0x36;
template<> const byte EMSA2HashId<SHA512>::id = 0x35;
#endif // CRYPTOPP_IS_DLL
NAMESPACE_END
#endif
#ifdef CRYPTOPP_EXPORTS
USING_NAMESPACE(CryptoPP)
using std::set_new_handler;
static PNew s_pNew = NULLPTR;
static PDelete s_pDelete = NULLPTR;
static void * New (size_t size)
{
void *p;
while ((p = malloc(size)) == NULLPTR)
CallNewHandler();
return p;
}
static void SetNewAndDeleteFunctionPointers()
{
void *p = NULLPTR;
HMODULE hModule = NULLPTR;
MEMORY_BASIC_INFORMATION mbi;
while (true)
{
VirtualQuery(p, &mbi, sizeof(mbi));
if (p >= (char *)mbi.BaseAddress + mbi.RegionSize)
break;
p = (char *)mbi.BaseAddress + mbi.RegionSize;
if (!mbi.AllocationBase || mbi.AllocationBase == hModule)
continue;
hModule = HMODULE(mbi.AllocationBase);
PGetNewAndDelete pGetNewAndDelete = (PGetNewAndDelete)GetProcAddress(hModule, "GetNewAndDeleteForCryptoPP");
if (pGetNewAndDelete)
{
pGetNewAndDelete(s_pNew, s_pDelete);
return;
}
PSetNewAndDelete pSetNewAndDelete = (PSetNewAndDelete)GetProcAddress(hModule, "SetNewAndDeleteFromCryptoPP");
if (pSetNewAndDelete)
{
s_pNew = &New;
s_pDelete = &free;
pSetNewAndDelete(s_pNew, s_pDelete, &set_new_handler);
return;
}
}
// try getting these directly using mangled names of new and delete operators
hModule = GetModuleHandle("msvcrtd");
if (!hModule)
hModule = GetModuleHandle("msvcrt");
if (hModule)
{
// 32-bit versions
s_pNew = (PNew)GetProcAddress(hModule, "??2@YAPAXI@Z");
s_pDelete = (PDelete)GetProcAddress(hModule, "??3@YAXPAX@Z");
if (s_pNew && s_pDelete)
return;
// 64-bit versions
s_pNew = (PNew)GetProcAddress(hModule, "??2@YAPEAX_K@Z");
s_pDelete = (PDelete)GetProcAddress(hModule, "??3@YAXPEAX@Z");
if (s_pNew && s_pDelete)
return;
}
OutputDebugString("Crypto++ DLL was not able to obtain new and delete function pointers.\n");
throw 0;
}
// Cast from FARPROC to funcptr with args
#pragma warning(default: 4191)
void * operator new (size_t size)
{
if (!s_pNew)
SetNewAndDeleteFunctionPointers();
return s_pNew(size);
}
void operator delete (void * p)
{
s_pDelete(p);
}
void * operator new [] (size_t size)
{
return operator new (size);
}
void operator delete [] (void * p)
{
operator delete (p);
}
#endif // CRYPTOPP_EXPORTS