crypto: fix output of privateDecrypt with zero-length data

closes #57553
closes #57572
closes #57558

PR-URL: nodejs/node#57575
Reviewed-By: James M Snell <[email protected]>
Reviewed-By: Luigi Pinca <[email protected]>
Reviewed-By: Yagiz Nizipli <[email protected]>
Reviewed-By: Tobias Nießen <[email protected]>
Reviewed-By: Darshan Sen <[email protected]>

Author: panva

src/ncrypto.cpp

@@ -163,7 +163,7 @@ Buffer<void> DataPointer::release() {
 DataPointer DataPointer::resize(size_t len) {
   size_t actual_len = std::min(len_, len);
   auto buf = release();
-  if (actual_len == len_) return DataPointer(buf);
+  if (actual_len == len_) return DataPointer(buf.data, actual_len);
   buf.data = OPENSSL_realloc(buf.data, actual_len);
   buf.len = actual_len;
   return DataPointer(buf);