Build lib_its_security on Windows

tools/itssecurity/test/test_lib_its_security.cc

-#ifdef _Win64
-#include "pch.h"
-#else
-#include <gtest/gtest.h>
-#endif
+#include "gtest/gtest.h"
 
 extern "C" {
 #include "lib_its_security.h"
-int8_t* bin_to_hex(const uint8_t* p_buffer, const size_t p_buffer_length);
+#ifndef _Win64
 uint8_t* hex_to_bin(const int8_t* p_buffer, size_t* p_buffer_length);
+#endif
+}
+
+#ifdef _Win64
+uint8_t* hex_to_bin(const int8_t* p_buffer, size_t* p_buffer_length) {
+    int8_t a;
+    size_t i, len;
+    uint8_t* retval = NULL;
+
+    // Sanity check
+    if (p_buffer == NULL) {
+        return NULL;
+    }
+    if ((len = strlen((const char*)p_buffer)) & 1) {
+        return NULL;
 }
 
+    retval = (uint8_t*)malloc(len >> 1);
+    for (i = 0; i < len; i++) {
+        a = toupper(*(p_buffer + i));
+        if (!isxdigit(a)) {
+            break;
+        }
+        if (isdigit(a)) {
+            a -= '0';
+        }
+        else {
+            a = a - 'A' + 0x0A;
+        }
+        if (i & 1) {
+            retval[i >> 1] |= a;
+        }
+        else {
+            retval[i >> 1] = a << 4;
+        }
+    } // End of 'for' statement
+    if (i < len) {
+        free(retval);
+        retval = NULL;
+    }
+    *p_buffer_length = len >> 1;
+
+    return retval;
+}
+#endif
 
+#ifndef _Win64
 /**
  * @class lib_its_security unit tests suite implementation
  */
 class lib_its_security_test_suite : public ::testing::Test {
 protected:
-  virtual void SetUp() { };
-  virtual void TearDown() { };
+    virtual void SetUp() { };
+    virtual void TearDown() { };
 };
+#endif
 
 TEST(lib_its_security_test_suite, Init1) {
     EXPECT_TRUE(initialize(nist_p_256, NULL) == -1);
@@ -1222,5 +1263,3 @@ int main(int argc, char **argv) {
   return RUN_ALL_TESTS();
 }
 
-
-