summaryrefslogtreecommitdiff
path: root/dll.cpp
blob: 37a4c87cb4aa684546a3ece8f36179e0f5b03dc9 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
// 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"
#include "pkcspad.h"
#include "emsa2.h"

#if defined(CRYPTOPP_MSC_VERSION)
// Cast from FARPROC to funcptr with args, http://stackoverflow.com/q/4192058/608639
# pragma warning(disable: 4191)
#endif

#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
#ifdef 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);

// http://github.com/weidai11/cryptopp/issues/517. OIDs and encoded prefixes found at
// http://www.ietf.org/archive/id/draft-jivsov-openpgp-sha3-01.txt
template<> const byte PKCS_DigestDecoration<SHA3_256>::decoration[] = {0x30,0x31,0x30,0x0d, 0x06,0x09,0x60,0x86, 0x48,0x01,0x65,0x03, 0x04,0x02,0x08,0x05, 0x00,0x04,0x20};
template<> const unsigned int PKCS_DigestDecoration<SHA3_256>::length = (unsigned int)sizeof(PKCS_DigestDecoration<SHA3_256>::decoration);

template<> const byte PKCS_DigestDecoration<SHA3_384>::decoration[] = {0x30,0x41,0x30,0x0d, 0x06,0x09,0x60,0x86, 0x48,0x01,0x65,0x03, 0x04,0x02,0x09,0x05, 0x00,0x04,0x30};
template<> const unsigned int PKCS_DigestDecoration<SHA3_384>::length = (unsigned int)sizeof(PKCS_DigestDecoration<SHA3_384>::decoration);

template<> const byte PKCS_DigestDecoration<SHA3_512>::decoration[] = {0x30,0x51,0x30,0x0d, 0x06,0x09,0x60,0x86, 0x48,0x01,0x65,0x03, 0x04,0x02,0x0a,0x05, 0x00,0x04,0x40};
template<> const unsigned int PKCS_DigestDecoration<SHA3_512>::length = (unsigned int)sizeof(PKCS_DigestDecoration<SHA3_512>::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)

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, &std::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;
	}

	OutputDebugStringA("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