diff --git a/src/env.h b/src/env.h
index b1ec2a1fe7f267..1fee31a9479e2a 100644
--- a/src/env.h
+++ b/src/env.h
@@ -243,6 +243,7 @@ struct PackageConfig {
   V(preference_string, "preference")                                          \
   V(priority_string, "priority")                                              \
   V(produce_cached_data_string, "produceCachedData")                          \
+  V(pubkey_string, "pubkey")                                                  \
   V(raw_string, "raw")                                                        \
   V(read_host_object_string, "_readHostObject")                               \
   V(readable_string, "readable")                                              \
diff --git a/src/node_crypto.cc b/src/node_crypto.cc
index 1451b44a370871..f700ccd2fa5b2e 100644
--- a/src/node_crypto.cc
+++ b/src/node_crypto.cc
@@ -1924,6 +1924,14 @@ static Local<Object> X509ToObject(Environment* env, X509* cert) {
                                   String::kNormalString,
                                   mem->length)).FromJust();
     USE(BIO_reset(bio));
+
+    int size = i2d_RSA_PUBKEY(rsa, nullptr);
+    CHECK_GE(size, 0);
+    Local<Object> pubbuff = Buffer::New(env, size).ToLocalChecked();
+    unsigned char* pubserialized =
+        reinterpret_cast<unsigned char*>(Buffer::Data(pubbuff));
+    i2d_RSA_PUBKEY(rsa, &pubserialized);
+    info->Set(env->pubkey_string(), pubbuff);
   }
 
   if (pkey != nullptr) {