Factor getCertificateChain out of ConnectionPopupInfo

chrome/browser/ui/android/page_info/certificate_chain_helper.cc

+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "chrome/browser/ui/android/page_info/certificate_chain_helper.h"
+
+#include "base/android/jni_android.h"
+#include "base/android/jni_array.h"
+#include "base/android/jni_string.h"
+#include "content/public/browser/browser_context.h"
+#include "content/public/browser/navigation_entry.h"
+#include "content/public/browser/ssl_status.h"
+#include "content/public/browser/web_contents.h"
+#include "jni/CertificateChainHelper_jni.h"
+#include "net/cert/x509_certificate.h"
+#include "ui/base/l10n/l10n_util.h"
+
+using base::android::JavaParamRef;
+using base::android::ScopedJavaLocalRef;
+using content::WebContents;
+
+static ScopedJavaLocalRef<jobjectArray> GetCertificateChain(
+    JNIEnv* env,
+    const JavaParamRef<jclass>&,
+    const JavaParamRef<jobject>& java_web_contents) {
+  content::WebContents* web_contents =
+      content::WebContents::FromJavaWebContents(java_web_contents);
+  if (!web_contents)
+    return ScopedJavaLocalRef<jobjectArray>();
+
+  scoped_refptr<net::X509Certificate> cert =
+      web_contents->GetController().GetVisibleEntry()->GetSSL().certificate;
+
+  std::vector<std::string> cert_chain;
+  net::X509Certificate::OSCertHandles cert_handles =
+      cert->GetIntermediateCertificates();
+  // Make sure the peer's own cert is the first in the chain, if it's not
+  // already there.
+  if (cert_handles.empty() || cert_handles[0] != cert->os_cert_handle())
+    cert_handles.insert(cert_handles.begin(), cert->os_cert_handle());
+
+  cert_chain.reserve(cert_handles.size());
+  for (const auto& handle : cert_handles) {
+    std::string cert_bytes;
+    net::X509Certificate::GetDEREncoded(handle, &cert_bytes);
+    cert_chain.push_back(cert_bytes);
+  }
+
+  return base::android::ToJavaArrayOfByteArray(env, cert_chain);
+}
+
+// static
+bool RegisterCertificateChainHelper(JNIEnv* env) {
+  return RegisterNativesImpl(env);
+}