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                 if(g_hOpenSSL)
  90                         FreeLibrary(g_hOpenSSL);
  91                 g_hOpenSSL = NULL;
  92                 return FALSE;
  93         }
  94         InitializeCriticalSection(&g_OpenSSLLock);
  95         pSSL_load_error_strings();
  96         pSSL_library_init();
  97         SetSSLTimeoutCallback(60000, DefaultSSLTimeoutCallback);
  98         g_bOpenSSLLoaded = TRUE;
  99         return TRUE;
 100 }
 101
 102 void FreeOpenSSL()
 103 {
 104         int i;
 105         if(!g_bOpenSSLLoaded)
 106                 return;
 107         EnterCriticalSection(&g_OpenSSLLock);
 108         for(i = 0; i < MAX_SSL_SOCKET; i++)
 109         {
 110                 if(g_pOpenSSLHandle[i])
 111                 {
 112                         pSSL_shutdown(g_pOpenSSLHandle[i]);
 113                         pSSL_free(g_pOpenSSLHandle[i]);
 114                         g_pOpenSSLHandle[i] = NULL;
 115                 }
 116         }
 117         if(g_pOpenSSLCTX)
 118                 pSSL_CTX_free(g_pOpenSSLCTX);
 119         g_pOpenSSLCTX = NULL;
 120         FreeLibrary(g_hOpenSSL);
 121         g_hOpenSSL = NULL;
 122         LeaveCriticalSection(&g_OpenSSLLock);
 123         DeleteCriticalSection(&g_OpenSSLLock);
 124         g_bOpenSSLLoaded = FALSE;
 125 }
 126
 127 BOOL IsOpenSSLLoaded()
 128 {
 129         return g_bOpenSSLLoaded;
 130 }
 131
 132 SSL** GetUnusedSSLPointer()
 133 {
 134         int i;
 135         for(i = 0; i < MAX_SSL_SOCKET; i++)
 136         {
 137                 if(!g_pOpenSSLHandle[i])
 138                         return &g_pOpenSSLHandle[i];
 139         }
 140         return NULL;
 141 }
 142
 143 SSL** FindSSLPointerFromSocket(SOCKET s)
 144 {
 145         int i;
 146         for(i = 0; i < MAX_SSL_SOCKET; i++)
 147         {
 148                 if(g_pOpenSSLHandle[i])
 149                 {
 150                         if(pSSL_get_fd(g_pOpenSSLHandle[i]) == s)
 151                                 return &g_pOpenSSLHandle[i];
 152                 }
 153         }
 154         return NULL;
 155 }
 156
 157 void SetSSLTimeoutCallback(DWORD Timeout, LPSSLTIMEOUTCALLBACK pCallback)
 158 {
 159         if(!g_bOpenSSLLoaded)
 160                 return;
 161         EnterCriticalSection(&g_OpenSSLLock);
 162         g_OpenSSLTimeout = Timeout;
 163         g_pOpenSSLTimeoutCallback = pCallback;
 164         LeaveCriticalSection(&g_OpenSSLLock);
 165 }
 166
 167 BOOL AttachSSL(SOCKET s)
 168 {
 169         BOOL r;
 170         DWORD Time;
 171         SSL** ppSSL;
 172         if(!g_bOpenSSLLoaded)
 173                 return FALSE;
 174         r = FALSE;
 175         Time = timeGetTime();
 176         EnterCriticalSection(&g_OpenSSLLock);
 177         if(!g_pOpenSSLCTX)
 178                 g_pOpenSSLCTX = pSSL_CTX_new(pSSLv23_method());
 179         if(g_pOpenSSLCTX)
 180         {
 181                 if(ppSSL = GetUnusedSSLPointer())
 182                 {
 183                         if(*ppSSL = pSSL_new(g_pOpenSSLCTX))
 184                         {
 185                                 if(pSSL_set_fd(*ppSSL, s) != 0)
 186                                 {
 187                                         r = TRUE;
 188                                         // 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
 189                                         while(pSSL_connect(*ppSSL) != 1)
 190                                         {
 191                                                 LeaveCriticalSection(&g_OpenSSLLock);
 192                                                 if(g_pOpenSSLTimeoutCallback() || timeGetTime() - Time >= g_OpenSSLTimeout)
 193                                                 {
 194                                                         DetachSSL(s);
 195                                                         r = FALSE;
 196                                                         EnterCriticalSection(&g_OpenSSLLock);
 197                                                         break;
 198                                                 }
 199                                                 EnterCriticalSection(&g_OpenSSLLock);
 200                                         }
 201                                 }
 202                                 else
 203                                         DetachSSL(s);
 204                         }
 205                 }
 206         }
 207         LeaveCriticalSection(&g_OpenSSLLock);
 208         return r;
 209 }
 210
 211 BOOL DetachSSL(SOCKET s)
 212 {
 213         BOOL r;
 214         SSL** ppSSL;
 215         if(!g_bOpenSSLLoaded)
 216                 return FALSE;
 217         r = FALSE;
 218         EnterCriticalSection(&g_OpenSSLLock);
 219         if(ppSSL = FindSSLPointerFromSocket(s))
 220         {
 221                 pSSL_shutdown(*ppSSL);
 222                 pSSL_free(*ppSSL);
 223                 *ppSSL = NULL;
 224                 r = TRUE;
 225         }
 226         LeaveCriticalSection(&g_OpenSSLLock);
 227         return r;
 228 }
 229
 230 BOOL IsSSLAttached(SOCKET s)
 231 {
 232         SSL** ppSSL;
 233         if(!g_bOpenSSLLoaded)
 234                 return FALSE;
 235         EnterCriticalSection(&g_OpenSSLLock);
 236         ppSSL = FindSSLPointerFromSocket(s);
 237         LeaveCriticalSection(&g_OpenSSLLock);
 238         if(!ppSSL)
 239                 return TRUE;
 240         return TRUE;
 241 }
 242
 243 SOCKET socketS(int af, int type, int protocol)
 244 {
 245         return socket(af, type, protocol);
 246 }
 247
 248 int bindS(SOCKET s, const struct sockaddr *addr, int namelen)
 249 {
 250         return bind(s, addr, namelen);
 251 }
 252
 253 int listenS(SOCKET s, int backlog)
 254 {
 255         return listen(s, backlog);
 256 }
 257
 258 SOCKET acceptS(SOCKET s, struct sockaddr *addr, int *addrlen)
 259 {
 260         SOCKET r;
 261         r = accept(s, addr, addrlen);
 262         if(!AttachSSL(r))
 263         {
 264                 closesocket(r);
 265                 return INVALID_SOCKET;
 266         }
 267         return r;
 268 }
 269
 270 int connectS(SOCKET s, const struct sockaddr *name, int namelen)
 271 {
 272         int r;
 273         r = connect(s, name, namelen);
 274         if(!AttachSSL(r))
 275                 return SOCKET_ERROR;
 276         return r;
 277 }
 278
 279 int closesocketS(SOCKET s)
 280 {
 281         DetachSSL(s);
 282         return closesocket(s);
 283 }
 284
 285 int sendS(SOCKET s, const char * buf, int len, int flags)
 286 {
 287         SSL** ppSSL;
 288         if(!g_bOpenSSLLoaded)
 289                 return send(s, buf, len, flags);
 290         EnterCriticalSection(&g_OpenSSLLock);
 291         ppSSL = FindSSLPointerFromSocket(s);
 292         LeaveCriticalSection(&g_OpenSSLLock);
 293         if(!ppSSL)
 294                 return send(s, buf, len, flags);
 295         return pSSL_write(*ppSSL, buf, len);
 296 }
 297
 298 int recvS(SOCKET s, char * buf, int len, int flags)
 299 {
 300         SSL** ppSSL;
 301         if(!g_bOpenSSLLoaded)
 302                 return recv(s, buf, len, flags);
 303         EnterCriticalSection(&g_OpenSSLLock);
 304         ppSSL = FindSSLPointerFromSocket(s);
 305         LeaveCriticalSection(&g_OpenSSLLock);
 306         if(!ppSSL)
 307                 return recv(s, buf, len, flags);
 308         if(flags & MSG_PEEK)
 309                 return pSSL_peek(*ppSSL, buf, len);
 310         return pSSL_read(*ppSSL, buf, len);
 311 }
 312