Adds support for the <keygen> tag for client certificate enrollment under Lin...

chrome/browser/renderer_host/x509_user_cert_resource_handler.cc

+// Copyright (c) 2009 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/renderer_host/x509_user_cert_resource_handler.h"
+
+#include "base/string_util.h"
+#include "chrome/browser/browser_process.h"
+#include "chrome/browser/chrome_thread.h"
+#include "chrome/browser/download/download_file.h"
+#include "chrome/browser/renderer_host/resource_dispatcher_host.h"
+#include "chrome/browser/renderer_host/resource_dispatcher_host_request_info.h"
+#include "chrome/common/url_constants.h"
+#include "net/base/cert_database.h"
+#include "net/base/io_buffer.h"
+#include "net/base/mime_sniffer.h"
+#include "net/base/mime_util.h"
+#include "net/http/http_response_headers.h"
+
+X509UserCertResourceHandler::X509UserCertResourceHandler(
+    ResourceDispatcherHost *host, URLRequest* request)
+    : host_(host),
+      request_(request),
+      content_length_(0),
+      buffer_(new DownloadBuffer),
+      read_buffer_(NULL),
+      resource_buffer_(NULL) {
+}
+
+bool X509UserCertResourceHandler::OnRequestRedirected(int request_id,
+                                                      const GURL& url,
+                                                      ResourceResponse* resp,
+                                                      bool *defer) {
+  url_ = url;
+  return true;
+}
+
+bool X509UserCertResourceHandler::OnResponseStarted(int request_id,
+                                                    ResourceResponse* resp) {
+  return (resp->response_head.mime_type == "application/x-x509-user-cert");
+
+}
+
+bool X509UserCertResourceHandler::OnWillRead(int request_id,
+                                             net::IOBuffer** buf,
+                                             int* buf_size,
+                                             int min_size) {
+  // FIXME(gauravsh): Should we use 'min_size' here?
+  DCHECK(buf && buf_size);
+  if (!read_buffer_) {
+    read_buffer_ = new net::IOBuffer(kReadBufSize);
+  }
+  *buf = read_buffer_.get();
+  *buf_size = kReadBufSize;
+
+  return true;
+}
+
+bool X509UserCertResourceHandler::OnReadCompleted(int request_id,
+                                                  int* bytes_read) {
+  if (!*bytes_read)
+    return true;
+
+  // We have more data to read.
+  DCHECK(read_buffer_);
+  content_length_ += *bytes_read;
+
+  // Release the ownership of the buffer, and store a reference
+  // to it. A new one will be allocated in OnWillRead().
+  net::IOBuffer* buffer = NULL;
+  read_buffer_.swap(&buffer);
+  // TODO(gauravsh): Should this be handled by a separate thread?
+  buffer_->contents.push_back(std::make_pair(buffer, *bytes_read));
+
+  return true;
+}
+
+bool X509UserCertResourceHandler::OnResponseCompleted(
+    int request_id,
+    const URLRequestStatus& urs,
+    const std::string& sec_info) {
+  // TODO(gauravsh): Verify that 'request_id' was actually a keygen form post
+  // and only then import the certificate
+  scoped_ptr<net::CertDatabase> cert_db(new net::CertDatabase());
+  AssembleResource();
+
+  return cert_db->AddUserCert(resource_buffer_->data(), content_length_);
+}
+
+void X509UserCertResourceHandler::AssembleResource() {
+  size_t bytes_copied = 0;
+  resource_buffer_ = new net::IOBuffer(content_length_);
+
+  for (size_t i = 0; i < buffer_->contents.size(); ++i) {
+    net::IOBuffer* data = buffer_->contents[i].first;
+    const int data_len = buffer_->contents[i].second;
+    DCHECK(bytes_copied + data_len <= content_length_);
+    memcpy(resource_buffer_->data() + bytes_copied, data->data(), data_len);
+    bytes_copied += data_len;
+  }
+}