Allow custom OpenSSL lib, only include openssl/x509v3.h when used. (#143)

* Allow custom OpenSSL lib, only include openssl/x509v3.h when used.

Using fnmatch on Unix systems, PathMatchSpecA is the best WINAPI equivalent.

* Moved shlwapi into WIN32 block.

CMakeLists.txt

@@ -158,7 +158,7 @@ if (APPLE AND USE_TLS AND NOT USE_MBED_TLS AND NOT USE_OPEN_SSL)
 endif()
 
 if (WIN32)
-  target_link_libraries(ixwebsocket wsock32 ws2_32)
+  target_link_libraries(ixwebsocket wsock32 ws2_32 shlwapi)
   add_definitions(-D_CRT_SECURE_NO_WARNINGS)
 endif()
 
@@ -175,7 +175,9 @@ if (USE_TLS AND USE_OPEN_SSL)
     set(CMAKE_INCLUDE_PATH ${CMAKE_INCLUDE_PATH} /usr/local/opt/openssl/include)
   endif()
 
+  if(NOT OPENSSL_FOUND)
     find_package(OpenSSL REQUIRED)
+  endif()
   add_definitions(${OPENSSL_DEFINITIONS})
   message(STATUS "OpenSSL: " ${OPENSSL_VERSION})
   include_directories(${OPENSSL_INCLUDE_DIR})

ixwebsocket/IXSocketFactory.cpp

@@ -10,12 +10,12 @@
 
 #ifdef IXWEBSOCKET_USE_MBED_TLS
 #include "IXSocketMbedTLS.h"
-#elif defined(_WIN32)
-#include "IXSocketSChannel.h"
 #elif defined(IXWEBSOCKET_USE_OPEN_SSL)
 #include "IXSocketOpenSSL.h"
 #elif __APPLE__
 #include "IXSocketAppleSSL.h"
+#elif defined(_WIN32)
+#include "IXSocketSChannel.h"
 #endif
 
 #else

ixwebsocket/IXSocketOpenSSL.cpp

@@ -11,8 +11,14 @@
 #include "IXSocketConnect.h"
 #include <cassert>
 #include <errno.h>
+#ifdef _WIN32
+#include <Shlwapi.h>
+#else
 #include <fnmatch.h>
+#endif
+#if OPENSSL_VERSION_NUMBER < 0x10100000L
 #include <openssl/x509v3.h>
+#endif
 #define socketerrno errno
 
 namespace ix
@@ -136,7 +142,11 @@ namespace ix
      */
     bool SocketOpenSSL::checkHost(const std::string& host, const char* pattern)
     {
+#ifdef _WIN32
+        return PathMatchSpecA(host.c_str(), pattern);
+#else
         return fnmatch(pattern, host.c_str(), 0) != FNM_NOMATCH;
+#endif
     }
 
     bool SocketOpenSSL::openSSLCheckServerCert(SSL* ssl,