socketwrapper.c

   1 // socketwrapper.cpp
   2 // Copyright (C) 2011 Suguru Kawamoto
   3 // \83\\83P\83b\83g\83\89\83b\83p\81[
   4 // socket\8aÖ\98A\8aÖ\90\94\82ðOpenSSL\97p\82É\92u\8a·
   5 // \83R\83\93\83p\83C\83\8b\82É\82ÍOpenSSL\82Ì\83w\83b\83_\81[\83t\83@\83C\83\8b\82ª\95K\97v
   6 // \8eÀ\8ds\82É\82ÍOpenSSL\82ÌDLL\82ª\95K\97v
   7
   8 #include <windows.h>
   9 #include <mmsystem.h>
  10 #include <openssl/ssl.h>
  11
  12 #include "socketwrapper.h"
  13
  14 typedef void (__stdcall* _SSL_load_error_strings)();
  15 typedef int (__stdcall* _SSL_library_init)();
  16 typedef SSL_METHOD* (__stdcall* _SSLv23_method)();
  17 typedef SSL_CTX* (__stdcall* _SSL_CTX_new)(SSL_METHOD*);
  18 typedef void (__stdcall* _SSL_CTX_free)(SSL_CTX*);
  19 typedef SSL* (__stdcall* _SSL_new)(SSL_CTX*);
  20 typedef void (__stdcall* _SSL_free)(SSL*);
  21 typedef int (__stdcall* _SSL_shutdown)(SSL*);
  22 typedef int (__stdcall* _SSL_get_fd)(SSL*);
  23 typedef int (__stdcall* _SSL_set_fd)(SSL*, int);
  24 typedef int (__stdcall* _SSL_accept)(SSL*);
  25 typedef int (__stdcall* _SSL_connect)(SSL*);
  26 typedef int (__stdcall* _SSL_write)(SSL*, const void*, int);
  27 typedef int (__stdcall* _SSL_peek)(SSL*, void*, int);
  28 typedef int (__stdcall* _SSL_read)(SSL*, void*, int);
  29 typedef int (__stdcall* _SSL_get_error)(SSL*, int);
  30
  31 _SSL_load_error_strings pSSL_load_error_strings;
  32 _SSL_library_init pSSL_library_init;
  33 _SSLv23_method pSSLv23_method;
  34 _SSL_CTX_new pSSL_CTX_new;
  35 _SSL_CTX_free pSSL_CTX_free;
  36 _SSL_new pSSL_new;
  37 _SSL_free pSSL_free;
  38 _SSL_shutdown pSSL_shutdown;
  39 _SSL_get_fd pSSL_get_fd;
  40 _SSL_set_fd pSSL_set_fd;
  41 _SSL_accept pSSL_accept;
  42 _SSL_connect pSSL_connect;
  43 _SSL_write pSSL_write;
  44 _SSL_peek pSSL_peek;
  45 _SSL_read pSSL_read;
  46 _SSL_get_error pSSL_get_error;
  47
  48 #define MAX_SSL_SOCKET 16
  49
  50 BOOL g_bOpenSSLLoaded;
  51 HMODULE g_hOpenSSL;
  52 CRITICAL_SECTION g_OpenSSLLock;
  53 DWORD g_OpenSSLTimeout;
  54 LPSSLTIMEOUTCALLBACK g_pOpenSSLTimeoutCallback;
  55 SSL_CTX* g_pOpenSSLCTX;
  56 SSL* g_pOpenSSLHandle[MAX_SSL_SOCKET];
  57
  58 BOOL __stdcall DefaultSSLTimeoutCallback()
  59 {
  60         Sleep(100);
  61         return FALSE;
  62 }
  63
  64 BOOL LoadOpenSSL()
  65 {
  66         if(g_bOpenSSLLoaded)
  67                 return FALSE;
  68         g_hOpenSSL = LoadLibrary("ssleay32.dll");
  69         if(!g_hOpenSSL)
  70                 g_hOpenSSL = LoadLibrary("libssl32.dll");
  71         if(!g_hOpenSSL
  72                 || !(pSSL_load_error_strings = (_SSL_load_error_strings)GetProcAddress(g_hOpenSSL, "SSL_load_error_strings"))
  73                 || !(pSSL_library_init = (_SSL_library_init)GetProcAddress(g_hOpenSSL, "SSL_library_init"))
  74                 || !(pSSLv23_method = (_SSLv23_method)GetProcAddress(g_hOpenSSL, "SSLv23_method"))
  75                 || !(pSSL_CTX_new = (_SSL_CTX_new)GetProcAddress(g_hOpenSSL, "SSL_CTX_new"))
  76                 || !(pSSL_CTX_free = (_SSL_CTX_free)GetProcAddress(g_hOpenSSL, "SSL_CTX_free"))
  77                 || !(pSSL_new = (_SSL_new)GetProcAddress(g_hOpenSSL, "SSL_new"))
  78                 || !(pSSL_free = (_SSL_free)GetProcAddress(g_hOpenSSL, "SSL_free"))
  79                 || !(pSSL_shutdown = (_SSL_shutdown)GetProcAddress(g_hOpenSSL, "SSL_shutdown"))
  80                 || !(pSSL_get_fd = (_SSL_get_fd)GetProcAddress(g_hOpenSSL, "SSL_get_fd"))
  81                 || !(pSSL_set_fd = (_SSL_set_fd)GetProcAddress(g_hOpenSSL, "SSL_set_fd"))
  82                 || !(pSSL_accept = (_SSL_accept)GetProcAddress(g_hOpenSSL, "SSL_accept"))
  83                 || !(pSSL_connect = (_SSL_connect)GetProcAddress(g_hOpenSSL, "SSL_connect"))
  84                 || !(pSSL_write = (_SSL_write)GetProcAddress(g_hOpenSSL, "SSL_write"))
  85                 || !(pSSL_peek = (_SSL_peek)GetProcAddress(g_hOpenSSL, "SSL_peek"))
  86                 || !(pSSL_read = (_SSL_read)GetProcAddress(g_hOpenSSL, "SSL_read"))
  87                 || !(pSSL_get_error = (_SSL_get_error)GetProcAddress(g_hOpenSSL, "SSL_get_error")))
  88         {
  89                 FreeLibrary(g_hOpenSSL);
  90                 g_hOpenSSL = NULL;
  91                 return FALSE;
  92         }
  93         InitializeCriticalSection(&g_OpenSSLLock);
  94         pSSL_load_error_strings();
  95         pSSL_library_init();
  96         SetSSLTimeoutCallback(60000, DefaultSSLTimeoutCallback);
  97         g_bOpenSSLLoaded = TRUE;
  98         return TRUE;
  99 }
 100
 101 void FreeOpenSSL()
 102 {
 103         int i;
 104         if(!g_bOpenSSLLoaded)
 105                 return;
 106         EnterCriticalSection(&g_OpenSSLLock);
 107         for(i = 0; i < MAX_SSL_SOCKET; i++)
 108         {
 109                 if(g_pOpenSSLHandle[i])
 110                 {
 111                         pSSL_shutdown(g_pOpenSSLHandle[i]);
 112                         pSSL_free(g_pOpenSSLHandle[i]);
 113                         g_pOpenSSLHandle[i] = NULL;
 114                 }
 115         }
 116         if(g_pOpenSSLCTX)
 117                 pSSL_CTX_free(g_pOpenSSLCTX);
 118         g_pOpenSSLCTX = NULL;
 119         FreeLibrary(g_hOpenSSL);
 120         g_hOpenSSL = NULL;
 121         LeaveCriticalSection(&g_OpenSSLLock);
 122         DeleteCriticalSection(&g_OpenSSLLock);
 123         g_bOpenSSLLoaded = FALSE;
 124 }
 125
 126 BOOL IsOpenSSLLoaded()
 127 {
 128         return g_bOpenSSLLoaded;
 129 }
 130
 131 SSL** GetUnusedSSLPointer()
 132 {
 133         int i;
 134         for(i = 0; i < MAX_SSL_SOCKET; i++)
 135         {
 136                 if(!g_pOpenSSLHandle[i])
 137                         return &g_pOpenSSLHandle[i];
 138         }
 139         return NULL;
 140 }
 141
 142 SSL** FindSSLPointerFromSocket(SOCKET s)
 143 {
 144         int i;
 145         for(i = 0; i < MAX_SSL_SOCKET; i++)
 146         {
 147                 if(g_pOpenSSLHandle[i])
 148                 {
 149                         if(pSSL_get_fd(g_pOpenSSLHandle[i]) == s)
 150                                 return &g_pOpenSSLHandle[i];
 151                 }
 152         }
 153         return NULL;
 154 }
 155
 156 void SetSSLTimeoutCallback(DWORD Timeout, LPSSLTIMEOUTCALLBACK pCallback)
 157 {
 158         EnterCriticalSection(&g_OpenSSLLock);
 159         g_OpenSSLTimeout = Timeout;
 160         g_pOpenSSLTimeoutCallback = pCallback;
 161         LeaveCriticalSection(&g_OpenSSLLock);
 162 }
 163
 164 BOOL AttachSSL(SOCKET s)
 165 {
 166         BOOL r;
 167         DWORD Time;
 168         SSL** ppSSL;
 169         r = FALSE;
 170         Time = timeGetTime();
 171         EnterCriticalSection(&g_OpenSSLLock);
 172         if(!g_pOpenSSLCTX)
 173                 g_pOpenSSLCTX = pSSL_CTX_new(pSSLv23_method());
 174         if(g_pOpenSSLCTX)
 175         {
 176                 if(ppSSL = GetUnusedSSLPointer())
 177                 {
 178                         if(*ppSSL = pSSL_new(g_pOpenSSLCTX))
 179                         {
 180                                 if(pSSL_set_fd(*ppSSL, s) != 0)
 181                                 {
 182                                         r = TRUE;
 183                                         // SSL\82Ì\83l\83S\83V\83G\81[\83V\83\87\83\93\82É\82Í\8e\9e\8aÔ\82ª\82©\82©\82é\8fê\8d\87\82ª\82 \82é
 184                                         while(pSSL_connect(*ppSSL) != 1)
 185                                         {
 186                                                 LeaveCriticalSection(&g_OpenSSLLock);
 187                                                 if(g_pOpenSSLTimeoutCallback() || timeGetTime() - Time >= g_OpenSSLTimeout)
 188                                                 {
 189                                                         DetachSSL(s);
 190                                                         r = FALSE;
 191                                                         EnterCriticalSection(&g_OpenSSLLock);
 192                                                         break;
 193                                                 }
 194                                                 EnterCriticalSection(&g_OpenSSLLock);
 195                                         }
 196                                 }
 197                                 else
 198                                         DetachSSL(s);
 199                         }
 200                 }
 201         }
 202         LeaveCriticalSection(&g_OpenSSLLock);
 203         return r;
 204 }
 205
 206 BOOL DetachSSL(SOCKET s)
 207 {
 208         BOOL r;
 209         SSL** ppSSL;
 210         r = FALSE;
 211         EnterCriticalSection(&g_OpenSSLLock);
 212         if(ppSSL = FindSSLPointerFromSocket(s))
 213         {
 214                 pSSL_shutdown(*ppSSL);
 215                 pSSL_free(*ppSSL);
 216                 *ppSSL = NULL;
 217                 r = TRUE;
 218         }
 219         LeaveCriticalSection(&g_OpenSSLLock);
 220         return r;
 221 }
 222
 223 BOOL IsSSLAttached(SOCKET s)
 224 {
 225         SSL** ppSSL;
 226         EnterCriticalSection(&g_OpenSSLLock);
 227         ppSSL = FindSSLPointerFromSocket(s);
 228         LeaveCriticalSection(&g_OpenSSLLock);
 229         if(!ppSSL)
 230                 return TRUE;
 231         return TRUE;
 232 }
 233
 234 SOCKET socketS(int af, int type, int protocol)
 235 {
 236         return socket(af, type, protocol);
 237 }
 238
 239 int bindS(SOCKET s, const struct sockaddr *addr, int namelen)
 240 {
 241         return bind(s, addr, namelen);
 242 }
 243
 244 int listenS(SOCKET s, int backlog)
 245 {
 246         return listen(s, backlog);
 247 }
 248
 249 SOCKET acceptS(SOCKET s, struct sockaddr *addr, int *addrlen)
 250 {
 251         SOCKET r;
 252         r = accept(s, addr, addrlen);
 253         if(!AttachSSL(r))
 254         {
 255                 closesocket(r);
 256                 return INVALID_SOCKET;
 257         }
 258         return r;
 259 }
 260
 261 int connectS(SOCKET s, const struct sockaddr *name, int namelen)
 262 {
 263         int r;
 264         r = connect(s, name, namelen);
 265         if(!AttachSSL(r))
 266                 return SOCKET_ERROR;
 267         return r;
 268 }
 269
 270 int closesocketS(SOCKET s)
 271 {
 272         DetachSSL(s);
 273         return closesocket(s);
 274 }
 275
 276 int sendS(SOCKET s, const char * buf, int len, int flags)
 277 {
 278         SSL** ppSSL;
 279         EnterCriticalSection(&g_OpenSSLLock);
 280         ppSSL = FindSSLPointerFromSocket(s);
 281         LeaveCriticalSection(&g_OpenSSLLock);
 282         if(!ppSSL)
 283                 return send(s, buf, len, flags);
 284         return pSSL_write(*ppSSL, buf, len);
 285 }
 286
 287 int recvS(SOCKET s, char * buf, int len, int flags)
 288 {
 289         SSL** ppSSL;
 290         EnterCriticalSection(&g_OpenSSLLock);
 291         ppSSL = FindSSLPointerFromSocket(s);
 292         LeaveCriticalSection(&g_OpenSSLLock);
 293         if(!ppSSL)
 294                 return recv(s, buf, len, flags);
 295         if(flags & MSG_PEEK)
 296                 return pSSL_peek(*ppSSL, buf, len);
 297         return pSSL_read(*ppSSL, buf, len);
 298 }
 299