src: update ECGroupPointer in ncrypto

PR-URL: nodejs/node#56526
Reviewed-By: Yagiz Nizipli <yagiz@nizipli.com>
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>

Author: jasnell

ncrypto.cc

@@ -2677,4 +2677,34 @@ Buffer<unsigned char> ECDSASigPointer::encode() const {
   return buf;
 }
 
+// ============================================================================
+
+ECGroupPointer::ECGroupPointer() : group_(nullptr) {}
+
+ECGroupPointer::ECGroupPointer(EC_GROUP* group) : group_(group) {}
+
+ECGroupPointer::ECGroupPointer(ECGroupPointer&& other) noexcept
+    : group_(other.release()) {}
+
+ECGroupPointer& ECGroupPointer::operator=(ECGroupPointer&& other) noexcept {
+  group_.reset(other.release());
+  return *this;
+}
+
+ECGroupPointer::~ECGroupPointer() {
+  reset();
+}
+
+void ECGroupPointer::reset(EC_GROUP* group) {
+  group_.reset();
+}
+
+EC_GROUP* ECGroupPointer::release() {
+  return group_.release();
+}
+
+ECGroupPointer ECGroupPointer::NewByCurveName(int nid) {
+  return ECGroupPointer(EC_GROUP_new_by_curve_name(nid));
+}
+
 }  // namespace ncrypto

ncrypto.h

@@ -197,7 +197,6 @@ using DeleteFnPtr = typename FunctionDeleter<T, function>::Pointer;
 
 using BignumCtxPointer = DeleteFnPtr<BN_CTX, BN_CTX_free>;
 using BignumGenCallbackPointer = DeleteFnPtr<BN_GENCB, BN_GENCB_free>;
-using ECGroupPointer = DeleteFnPtr<EC_GROUP, EC_GROUP_free>;
 using ECKeyPointer = DeleteFnPtr<EC_KEY, EC_KEY_free>;
 using ECPointPointer = DeleteFnPtr<EC_POINT, EC_POINT_free>;
 using EVPKeyCtxPointer = DeleteFnPtr<EVP_PKEY_CTX, EVP_PKEY_CTX_free>;
@@ -852,6 +851,28 @@ class ECDSASigPointer final {
   const BIGNUM* ps_ = nullptr;
 };
 
+class ECGroupPointer final {
+ public:
+  explicit ECGroupPointer();
+  explicit ECGroupPointer(EC_GROUP* group);
+  ECGroupPointer(ECGroupPointer&& other) noexcept;
+  ECGroupPointer& operator=(ECGroupPointer&& other) noexcept;
+  NCRYPTO_DISALLOW_COPY(ECGroupPointer)
+  ~ECGroupPointer();
+
+  inline bool operator==(std::nullptr_t) noexcept { return group_ == nullptr; }
+  inline operator bool() const { return group_ != nullptr; }
+  inline EC_GROUP* get() const { return group_.get(); }
+  inline operator EC_GROUP*() const { return group_.get(); }
+  void reset(EC_GROUP* group = nullptr);
+  EC_GROUP* release();
+
+  static ECGroupPointer NewByCurveName(int nid);
+
+ private:
+  DeleteFnPtr<EC_GROUP, EC_GROUP_free> group_;
+};
+
 #ifndef OPENSSL_NO_ENGINE
 class EnginePointer final {
  public: