pkey.getPrivateKey: use password callback

Author: kunkku

src/openssl.c

@@ -4106,7 +4106,7 @@ static int pk_getPrivateKey(lua_State *L) {
 	char *str;
 	long len;
 
-	if (!PEM_write_bio_PrivateKey(bio, key, cipher, pass, pass ? strlen(pass) : 0, 0, 0))
+	if (!PEM_write_bio_PrivateKey(bio, key, cipher, NULL, 0, pem_pw_cb, pass))
 		return auxL_error(L, auxL_EOPENSSL, "pkey:getPrivateKey");
 	len = BIO_get_mem_data(bio, &str);
 	lua_pushlstring(L, str, len);