1 files changed, 59 insertions, 0 deletions
diff --git a/include/curlinit.hxx b/include/curlinit.hxx
new file mode 100644
index 000000000000..8b3a9968419d
--- /dev/null
+++ b/include/curlinit.hxx
@@ -0,0 +1,59 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+#pragma once
+
+#include <curl/curl.h>
+
+#if defined(LINUX) && !defined(SYSTEM_CURL)
+#include <com/sun/star/uno/RuntimeException.hpp>
+
+#include <unistd.h>
+
+static char const* GetCABundleFile()
+{
+    // try system ones first; inspired by:
+    // https://www.happyassassin.net/posts/2015/01/12/a-note-about-ssltls-trusted-certificate-stores-and-platforms/
+    auto const candidates = {
+        "/etc/pki/tls/certs/ca-bundle.crt",
+        "/etc/pki/tls/certs/ca-bundle.trust.crt",
+        "/etc/ssl/certs/ca-certificates.crt",
+        "/var/lib/ca-certificates/ca-bundle.pem",
+    };
+    for (char const* const candidate : candidates)
+    {
+        if (access(candidate, R_OK) == 0)
+        {
+            return candidate;
+        }
+    }
+
+    throw css::uno::RuntimeException("no OpenSSL CA certificate bundle found");
+}
+
+static void InitCurl_easy(CURL* const pCURL)
+{
+    char const* const path = GetCABundleFile();
+    auto rc = curl_easy_setopt(pCURL, CURLOPT_CAINFO, path);
+    if (rc != CURLE_OK) // only if OOM?
+    {
+        throw css::uno::RuntimeException("CURLOPT_CAINFO failed");
+    }
+}
+
+#else
+
+static void InitCurl_easy(CURL* const)
+{
+    // these don't use OpenSSL so CAs work out of the box
+}
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */