8303607: SunMSCAPI provider leaks memory and keys

Reviewed-by: weijun

Author: Mat Carter

src/jdk.crypto.mscapi/windows/native/libsunmscapi/security.cpp

@@ -523,7 +523,11 @@ JNIEXPORT void JNICALL Java_sun_security_mscapi_CKeyStore_loadKeysOrCertificateC
             else
             {
                 if (bCallerFreeProv == TRUE) {
-                    ::CryptReleaseContext(hCryptProv, NULL); // deprecated
+                    if ((dwKeySpec & CERT_NCRYPT_KEY_SPEC) == CERT_NCRYPT_KEY_SPEC) {
+                        NCryptFreeObject(hCryptProv);
+                    } else {
+                        ::CryptReleaseContext(hCryptProv, NULL); // deprecated
+                    }
                     bCallerFreeProv = FALSE;
                 }