Crypto++  5.6.5
Free C++ class library of cryptographic schemes
dll.cpp
1 // dll.cpp - written and placed in the public domain by Wei Dai
2 
3 #define CRYPTOPP_MANUALLY_INSTANTIATE_TEMPLATES
4 #define CRYPTOPP_DEFAULT_NO_DLL
5 
6 #include "dll.h"
7 #include "config.h"
8 
9 // TODO: fix the C4589 warnings
10 #if CRYPTOPP_MSC_VERSION
11 # pragma warning(disable: 4589)
12 #endif
13 
14 #if CRYPTOPP_MSC_VERSION
15 # pragma warning(default: 4660)
16 #endif
17 
18 #if defined(CRYPTOPP_EXPORTS) && defined(CRYPTOPP_WIN32_AVAILABLE)
19 #include <windows.h>
20 #endif
21 
22 #ifndef CRYPTOPP_IMPORTS
23 
24 NAMESPACE_BEGIN(CryptoPP)
25 
26 // Guarding based on DLL due to Clang, http://github.com/weidai11/cryptopp/issues/300
27 #if defined(CRYPTOPP_IS_DLL)
28 template<> const byte PKCS_DigestDecoration<SHA1>::decoration[] = {0x30,0x21,0x30,0x09,0x06,0x05,0x2B,0x0E,0x03,0x02,0x1A,0x05,0x00,0x04,0x14};
30 
31 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};
33 
34 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};
36 
37 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};
39 
40 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};
42 
43 template<> const byte EMSA2HashId<SHA1>::id = 0x33;
44 template<> const byte EMSA2HashId<SHA224>::id = 0x38;
45 template<> const byte EMSA2HashId<SHA256>::id = 0x34;
46 template<> const byte EMSA2HashId<SHA384>::id = 0x36;
47 template<> const byte EMSA2HashId<SHA512>::id = 0x35;
48 
49 #endif // CRYPTOPP_IS_DLL
50 
51 NAMESPACE_END
52 
53 #endif
54 
55 #ifdef CRYPTOPP_EXPORTS
56 
57 USING_NAMESPACE(CryptoPP)
58 
59 #if !(defined(_MSC_VER) && (_MSC_VER < 1300))
60 using std::set_new_handler;
61 #endif
62 
63 static PNew s_pNew = NULL;
64 static PDelete s_pDelete = NULL;
65 
66 static void * New (size_t size)
67 {
68  void *p;
69  while ((p = malloc(size)) == NULL)
71 
72  return p;
73 }
74 
75 // Cast from FARPROC to funcptr with args, http://stackoverflow.com/q/4192058/608639
76 #pragma warning(disable: 4191)
77 
78 static void SetNewAndDeleteFunctionPointers()
79 {
80  void *p = NULL;
81  HMODULE hModule = NULL;
82  MEMORY_BASIC_INFORMATION mbi;
83 
84  while (true)
85  {
86  VirtualQuery(p, &mbi, sizeof(mbi));
87 
88  if (p >= (char *)mbi.BaseAddress + mbi.RegionSize)
89  break;
90 
91  p = (char *)mbi.BaseAddress + mbi.RegionSize;
92 
93  if (!mbi.AllocationBase || mbi.AllocationBase == hModule)
94  continue;
95 
96  hModule = HMODULE(mbi.AllocationBase);
97  PGetNewAndDelete pGetNewAndDelete = (PGetNewAndDelete)GetProcAddress(hModule, "GetNewAndDeleteForCryptoPP");
98  if (pGetNewAndDelete)
99  {
100  pGetNewAndDelete(s_pNew, s_pDelete);
101  return;
102  }
103 
104  PSetNewAndDelete pSetNewAndDelete = (PSetNewAndDelete)GetProcAddress(hModule, "SetNewAndDeleteFromCryptoPP");
105  if (pSetNewAndDelete)
106  {
107  s_pNew = &New;
108  s_pDelete = &free;
109  pSetNewAndDelete(s_pNew, s_pDelete, &set_new_handler);
110  return;
111  }
112  }
113 
114  // try getting these directly using mangled names of new and delete operators
115 
116  hModule = GetModuleHandle("msvcrtd");
117  if (!hModule)
118  hModule = GetModuleHandle("msvcrt");
119  if (hModule)
120  {
121  // 32-bit versions
122  s_pNew = (PNew)GetProcAddress(hModule, "??2@YAPAXI@Z");
123  s_pDelete = (PDelete)GetProcAddress(hModule, "??3@YAXPAX@Z");
124  if (s_pNew && s_pDelete)
125  return;
126 
127  // 64-bit versions
128  s_pNew = (PNew)GetProcAddress(hModule, "??2@YAPEAX_K@Z");
129  s_pDelete = (PDelete)GetProcAddress(hModule, "??3@YAXPEAX@Z");
130  if (s_pNew && s_pDelete)
131  return;
132  }
133 
134  OutputDebugString("Crypto++ DLL was not able to obtain new and delete function pointers.\n");
135  throw 0;
136 }
137 
138 // Cast from FARPROC to funcptr with args
139 #pragma warning(default: 4191)
140 
141 void * operator new (size_t size)
142 {
143  if (!s_pNew)
144  SetNewAndDeleteFunctionPointers();
145 
146  return s_pNew(size);
147 }
148 
149 void operator delete (void * p)
150 {
151  s_pDelete(p);
152 }
153 
154 void * operator new [] (size_t size)
155 {
156  return operator new (size);
157 }
158 
159 void operator delete [] (void * p)
160 {
161  operator delete (p);
162 }
163 
164 #endif // #ifdef CRYPTOPP_EXPORTS
CallNewHandler
void CallNewHandler()
Attempts to reclaim unused memory.
Definition: misc.cpp:199
EMSA2HashId
Definition: emsa2.h:19
PKCS_DigestDecoration
PKCS#1 decoration data structure.
Definition: pkcspad.h:34
CryptoPP
Crypto++ library namespace.
config.h
Library configuration file.
dll.h
Functions and definitions required for building the FIPS-140 DLL on Windows.