crypto: remove DiffieHellman.initialised_

As pointed out by Ben Noordhuis, this internal field can be removed
since all instances are initialized when exposed to users.

PR-URL: #23717
Refs: #23648
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>

src/node_crypto.cc

@@ -4001,11 +4001,7 @@ bool DiffieHellman::Init(int primeLength, int g) {
   dh_.reset(DH_new());
   if (!DH_generate_parameters_ex(dh_.get(), primeLength, g, 0))
     return false;
-  bool result = VerifyContext();
-  if (!result)
-    return false;
-  initialised_ = true;
-  return true;
+  return VerifyContext();
 }
 
 
@@ -4020,11 +4016,7 @@ bool DiffieHellman::Init(const char* p, int p_len, int g) {
     BN_free(bn_g);
     return false;
   }
-  bool result = VerifyContext();
-  if (!result)
-    return false;
-  initialised_ = true;
-  return true;
+  return VerifyContext();
 }
 
 
@@ -4037,11 +4029,7 @@ bool DiffieHellman::Init(const char* p, int p_len, const char* g, int g_len) {
     BN_free(bn_g);
     return false;
   }
-  bool result = VerifyContext();
-  if (!result)
-    return false;
-  initialised_ = true;
-  return true;
+  return VerifyContext();
 }
 
 
@@ -4115,7 +4103,6 @@ void DiffieHellman::GenerateKeys(const FunctionCallbackInfo<Value>& args) {
 
   DiffieHellman* diffieHellman;
   ASSIGN_OR_RETURN_UNWRAP(&diffieHellman, args.Holder());
-  CHECK(diffieHellman->initialised_);
 
   if (!DH_generate_key(diffieHellman->dh_.get())) {
     return ThrowCryptoError(env, ERR_get_error(), "Key generation failed");
@@ -4137,7 +4124,6 @@ void DiffieHellman::GetField(const FunctionCallbackInfo<Value>& args,
 
   DiffieHellman* dh;
   ASSIGN_OR_RETURN_UNWRAP(&dh, args.Holder());
-  CHECK(dh->initialised_);
 
   const BIGNUM* num = get_field(dh->dh_.get());
   if (num == nullptr) return env->ThrowError(err_if_null);
@@ -4189,7 +4175,6 @@ void DiffieHellman::ComputeSecret(const FunctionCallbackInfo<Value>& args) {
 
   DiffieHellman* diffieHellman;
   ASSIGN_OR_RETURN_UNWRAP(&diffieHellman, args.Holder());
-  CHECK(diffieHellman->initialised_);
 
   ClearErrorOnReturn clear_error_on_return;
 
@@ -4257,7 +4242,6 @@ void DiffieHellman::SetKey(const v8::FunctionCallbackInfo<Value>& args,
 
   DiffieHellman* dh;
   ASSIGN_OR_RETURN_UNWRAP(&dh, args.Holder());
-  CHECK(dh->initialised_);
 
   char errmsg[64];
 
@@ -4303,7 +4287,6 @@ void DiffieHellman::VerifyErrorGetter(const FunctionCallbackInfo<Value>& args) {
 
   DiffieHellman* diffieHellman;
   ASSIGN_OR_RETURN_UNWRAP(&diffieHellman, args.Holder());
-  CHECK(diffieHellman->initialised_);
 
   args.GetReturnValue().Set(diffieHellman->verifyError_);
 }

src/node_crypto.h

@@ -615,7 +615,6 @@ class DiffieHellman : public BaseObject {
 
   DiffieHellman(Environment* env, v8::Local<v8::Object> wrap)
       : BaseObject(env, wrap),
-        initialised_(false),
         verifyError_(0) {
     MakeWeak();
   }
@@ -633,7 +632,6 @@ class DiffieHellman : public BaseObject {
                      int (*set_field)(DH*, BIGNUM*), const char* what);
   bool VerifyContext();
 
-  bool initialised_;
   int verifyError_;
   DHPointer dh_;
 };