src: make SecureContext fields private

These fields should not be public. Only ctx_ is used outside of the
class itself, and should be accessed through the ctx() function
instead.

PR-URL: #43173
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Minwoo Jung <nodecorelab@gmail.com>

Author: tniessen

src/crypto/crypto_common.cc

@@ -154,7 +154,7 @@ long VerifyPeerCertificate(  // NOLINT(runtime/int)
 
 bool UseSNIContext(
     const SSLPointer& ssl, BaseObjectPtr<SecureContext> context) {
-  SSL_CTX* ctx = context->ctx_.get();
+  SSL_CTX* ctx = context->ctx().get();
   X509* x509 = SSL_CTX_get0_certificate(ctx);
   EVP_PKEY* pkey = SSL_CTX_get0_privatekey(ctx);
   STACK_OF(X509)* chain;
@@ -218,7 +218,7 @@ const char* GetServerName(SSL* ssl) {
 }
 
 bool SetGroups(SecureContext* sc, const char* groups) {
-  return SSL_CTX_set1_groups_list(sc->ssl_ctx(), groups) == 1;
+  return SSL_CTX_set1_groups_list(sc->ctx().get(), groups) == 1;
 }
 
 const char* X509ErrorCode(long err) {  // NOLINT(runtime/int)

src/crypto/crypto_context.h

@@ -41,7 +41,7 @@ class SecureContext final : public BaseObject {
   static void RegisterExternalReferences(ExternalReferenceRegistry* registry);
   static SecureContext* Create(Environment* env);
 
-  SSL_CTX* ssl_ctx() const { return ctx_.get(); }
+  const SSLCtxPointer& ctx() const { return ctx_; }
 
   SSLPointer CreateSSL();
 
@@ -55,14 +55,6 @@ class SecureContext final : public BaseObject {
   SET_MEMORY_INFO_NAME(SecureContext)
   SET_SELF_SIZE(SecureContext)
 
-  SSLCtxPointer ctx_;
-  X509Pointer cert_;
-  X509Pointer issuer_;
-#ifndef OPENSSL_NO_ENGINE
-  bool client_cert_engine_provided_ = false;
-  EnginePointer private_key_engine_;
-#endif  // !OPENSSL_NO_ENGINE
-
   static const int kMaxSessionSize = 10 * 1024;
 
   // See TicketKeyCallback
@@ -72,10 +64,6 @@ class SecureContext final : public BaseObject {
   static const int kTicketKeyNameIndex = 3;
   static const int kTicketKeyIVIndex = 4;
 
-  unsigned char ticket_key_name_[16];
-  unsigned char ticket_key_aes_[16];
-  unsigned char ticket_key_hmac_[16];
-
  protected:
   // OpenSSL structures are opaque. This is sizeof(SSL_CTX) for OpenSSL 1.1.1b:
   static const int64_t kExternalSize = 1024;
@@ -137,6 +125,19 @@ class SecureContext final : public BaseObject {
 
   SecureContext(Environment* env, v8::Local<v8::Object> wrap);
   void Reset();
+
+ private:
+  SSLCtxPointer ctx_;
+  X509Pointer cert_;
+  X509Pointer issuer_;
+#ifndef OPENSSL_NO_ENGINE
+  bool client_cert_engine_provided_ = false;
+  EnginePointer private_key_engine_;
+#endif  // !OPENSSL_NO_ENGINE
+
+  unsigned char ticket_key_name_[16];
+  unsigned char ticket_key_aes_[16];
+  unsigned char ticket_key_hmac_[16];
 };
 
 }  // namespace crypto

src/crypto/crypto_tls.cc

@@ -295,8 +295,8 @@ int TLSExtStatusCallback(SSL* s, void* arg) {
 
 void ConfigureSecureContext(SecureContext* sc) {
   // OCSP stapling
-  SSL_CTX_set_tlsext_status_cb(sc->ctx_.get(), TLSExtStatusCallback);
-  SSL_CTX_set_tlsext_status_arg(sc->ctx_.get(), nullptr);
+  SSL_CTX_set_tlsext_status_cb(sc->ctx().get(), TLSExtStatusCallback);
+  SSL_CTX_set_tlsext_status_arg(sc->ctx().get(), nullptr);
 }
 
 inline bool Set(
@@ -1303,20 +1303,20 @@ int TLSWrap::SelectSNIContextCallback(SSL* s, int* ad, void* arg) {
   p->sni_context_ = BaseObjectPtr<SecureContext>(sc);
 
   ConfigureSecureContext(sc);
-  CHECK_EQ(SSL_set_SSL_CTX(p->ssl_.get(), sc->ctx_.get()), sc->ctx_.get());
+  CHECK_EQ(SSL_set_SSL_CTX(p->ssl_.get(), sc->ctx().get()), sc->ctx().get());
   p->SetCACerts(sc);
 
   return SSL_TLSEXT_ERR_OK;
 }
 
 int TLSWrap::SetCACerts(SecureContext* sc) {
-  int err = SSL_set1_verify_cert_store(
-      ssl_.get(), SSL_CTX_get_cert_store(sc->ctx_.get()));
+  int err = SSL_set1_verify_cert_store(ssl_.get(),
+                                       SSL_CTX_get_cert_store(sc->ctx().get()));
   if (err != 1)
     return err;
 
   STACK_OF(X509_NAME)* list =
-      SSL_dup_CA_list(SSL_CTX_get_client_CA_list(sc->ctx_.get()));
+      SSL_dup_CA_list(SSL_CTX_get_client_CA_list(sc->ctx().get()));
 
   // NOTE: `SSL_set_client_CA_list` takes the ownership of `list`
   SSL_set_client_CA_list(ssl_.get(), list);