crypto: added support for reading system store crtificates in windows

Author: twitharshil

src/crypto/crypto_context.cc

@@ -18,6 +18,13 @@
 #include <openssl/engine.h>
 #endif  // !OPENSSL_NO_ENGINE
 
+#ifdef _WIN32
+#include <Windows.h>
+#include <wincrypt.h>
+
+#include "base64-inl.h"
+#endif
+
 namespace node {
 
 using v8::Array;
@@ -190,17 +197,84 @@ int SSL_CTX_use_certificate_chain(SSL_CTX* ctx,
 
 }  // namespace
 
+void ReadSystemStoreCertificates(
+    std::vector<std::string>* system_root_certificates) {
+  const HCERTSTORE hStore = CertOpenSystemStoreW(0, L"ROOT");
+  CHECK_NE(hStore, NULL);
+
+  auto cleanup = OnScopeLeave(
+      [hStore]() { CHECK_EQ(CertCloseStore(hStore, 0), TRUE); });
+
+  PCCERT_CONTEXT pCtx = nullptr;
+
+  while ((pCtx = CertEnumCertificatesInStore(hStore, pCtx)) != nullptr) {
+    const DWORD cbSize = CertGetNameStringW(pCtx, CERT_NAME_SIMPLE_DISPLAY_TYPE,
+                                            0, nullptr, nullptr, 0);
+
+    CHECK_GT(cbSize, 0);
+
+    std::vector<wchar_t> pszName(cbSize);
+
+    CHECK_GT(CertGetNameStringW(pCtx, CERT_NAME_SIMPLE_DISPLAY_TYPE, 0, nullptr,
+                                pszName.data(), cbSize),
+             0);
+    
+    const char* certificate_src_ptr =
+        reinterpret_cast<const char*>(pCtx->pbCertEncoded);
+    const size_t slen = pCtx->cbCertEncoded;
+    const size_t dlen = base64_encoded_size(slen);
+
+    char* certificate_dst_ptr = UncheckedMalloc(dlen);
+
+    CHECK_NOT_NULL(certificate_dst_ptr);
+
+    auto cleanup = OnScopeLeave(
+        [certificate_dst_ptr]() { free(certificate_dst_ptr); });
+
+    const size_t written = base64_encode(certificate_src_ptr, slen,
+                                                certificate_dst_ptr, dlen);
+    CHECK_EQ(written, dlen);
+
+    std::string base64_string_output(certificate_dst_ptr, dlen);
+
+    constexpr size_t distance = 72;
+    size_t pos = distance;
+
+    while (pos < base64_string_output.size()) {
+      base64_string_output.insert(pos, "\n");
+      pos += distance + 1;
+    }
+
+    base64_string_output = "-----BEGIN CERTIFICATE-----\n" +
+                            base64_string_output +
+                            "\n-----END CERTIFICATE-----";
+
+    system_root_certificates->emplace_back(std::move(base64_string_output));
+  }
+}
+
 X509_STORE* NewRootCertStore() {
   static std::vector<X509*> root_certs_vector;
   static Mutex root_certs_vector_mutex;
   Mutex::ScopedLock lock(root_certs_vector_mutex);
 
   if (root_certs_vector.empty() &&
       per_process::cli_options->ssl_openssl_cert_store == false) {
+
+    std::vector<std::string> combined_root_certs;
+
     for (size_t i = 0; i < arraysize(root_certs); i++) {
+      combined_root_certs.emplace_back(root_certs[i]);
+    }
+
+#ifdef _WIN32
+    ReadSystemStoreCertificates(&combined_root_certs);
+#endif
+
+    for (size_t i = 0; i < combined_root_certs.size(); i++) {
       X509* x509 =
-          PEM_read_bio_X509(NodeBIO::NewFixed(root_certs[i],
-                                              strlen(root_certs[i])).get(),
+          PEM_read_bio_X509(NodeBIO::NewFixed(combined_root_certs[i].c_str(),
+                                              combined_root_certs[i].length()).get(),
                             nullptr,   // no re-use of X509 structure
                             NoPasswordCallback,
                             nullptr);  // no callback data
@@ -234,19 +308,30 @@ X509_STORE* NewRootCertStore() {
 
 void GetRootCertificates(const FunctionCallbackInfo<Value>& args) {
   Environment* env = Environment::GetCurrent(args);
-  Local<Value> result[arraysize(root_certs)];
+
+  std::vector<std::string> combined_root_certs;
 
   for (size_t i = 0; i < arraysize(root_certs); i++) {
+    combined_root_certs.emplace_back(root_certs[i]);
+  }
+
+#ifdef _WIN32
+  ReadSystemStoreCertificates(&combined_root_certs);
+#endif
+
+  std::vector<Local<Value>> result(combined_root_certs.size());
+
+  for (size_t i = 0; i < combined_root_certs.size(); i++) {
     if (!String::NewFromOneByte(
             env->isolate(),
-            reinterpret_cast<const uint8_t*>(root_certs[i]))
+            reinterpret_cast<const uint8_t*>(combined_root_certs[i].c_str()))
             .ToLocal(&result[i])) {
       return;
     }
   }
 
   args.GetReturnValue().Set(
-      Array::New(env->isolate(), result, arraysize(root_certs)));
+      Array::New(env->isolate(), result.data(), combined_root_certs.size()));
 }
 
 bool SecureContext::HasInstance(Environment* env, const Local<Value>& value) {