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// Copyright (c) 2012 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 "content/browser/renderer_host/pepper/pepper_socket_utils.h"
#include <string>
#include <vector>
#include "base/logging.h"
#include "base/memory/ref_counted.h"
#include "base/strings/string_util.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/content_browser_client.h"
#include "content/public/browser/render_frame_host.h"
#include "content/public/browser/site_instance.h"
#include "content/public/common/content_client.h"
#include "net/base/ip_endpoint.h"
#include "net/cert/x509_certificate.h"
#include "ppapi/c/private/ppb_net_address_private.h"
#include "ppapi/shared_impl/private/net_address_private_impl.h"
#include "ppapi/shared_impl/private/ppb_x509_certificate_private_shared.h"
#if defined(OS_CHROMEOS)
#include "chromeos/network/firewall_hole.h"
#endif // defined(OS_CHROMEOS)
namespace content {
namespace pepper_socket_utils {
SocketPermissionRequest CreateSocketPermissionRequest(
SocketPermissionRequest::OperationType type,
const PP_NetAddress_Private& net_addr) {
std::string host =
ppapi::NetAddressPrivateImpl::DescribeNetAddress(net_addr, false);
uint16 port = 0;
std::vector<unsigned char> address;
ppapi::NetAddressPrivateImpl::NetAddressToIPEndPoint(
net_addr, &address, &port);
return SocketPermissionRequest(type, host, port);
}
bool CanUseSocketAPIs(bool external_plugin,
bool private_api,
const SocketPermissionRequest* params,
int render_process_id,
int render_frame_id) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
if (!external_plugin) {
// Always allow socket APIs for out-process plugins (other than external
// plugins instantiated by the embedder through
// BrowserPpapiHost::CreateExternalPluginProcess).
return true;
}
RenderFrameHost* render_frame_host =
RenderFrameHost::FromID(render_process_id, render_frame_id);
if (!render_frame_host)
return false;
SiteInstance* site_instance = render_frame_host->GetSiteInstance();
if (!site_instance)
return false;
if (!GetContentClient()->browser()->AllowPepperSocketAPI(
site_instance->GetBrowserContext(),
site_instance->GetSiteURL(),
private_api,
params)) {
LOG(ERROR) << "Host " << site_instance->GetSiteURL().host()
<< " cannot use socket API or destination is not allowed";
return false;
}
return true;
}
bool GetCertificateFields(const net::X509Certificate& cert,
ppapi::PPB_X509Certificate_Fields* fields) {
const net::CertPrincipal& issuer = cert.issuer();
fields->SetField(PP_X509CERTIFICATE_PRIVATE_ISSUER_COMMON_NAME,
new base::StringValue(issuer.common_name));
fields->SetField(PP_X509CERTIFICATE_PRIVATE_ISSUER_LOCALITY_NAME,
new base::StringValue(issuer.locality_name));
fields->SetField(PP_X509CERTIFICATE_PRIVATE_ISSUER_STATE_OR_PROVINCE_NAME,
new base::StringValue(issuer.state_or_province_name));
fields->SetField(PP_X509CERTIFICATE_PRIVATE_ISSUER_COUNTRY_NAME,
new base::StringValue(issuer.country_name));
fields->SetField(
PP_X509CERTIFICATE_PRIVATE_ISSUER_ORGANIZATION_NAME,
new base::StringValue(base::JoinString(issuer.organization_names, "\n")));
fields->SetField(
PP_X509CERTIFICATE_PRIVATE_ISSUER_ORGANIZATION_UNIT_NAME,
new base::StringValue(
base::JoinString(issuer.organization_unit_names, "\n")));
const net::CertPrincipal& subject = cert.subject();
fields->SetField(PP_X509CERTIFICATE_PRIVATE_SUBJECT_COMMON_NAME,
new base::StringValue(subject.common_name));
fields->SetField(PP_X509CERTIFICATE_PRIVATE_SUBJECT_LOCALITY_NAME,
new base::StringValue(subject.locality_name));
fields->SetField(PP_X509CERTIFICATE_PRIVATE_SUBJECT_STATE_OR_PROVINCE_NAME,
new base::StringValue(subject.state_or_province_name));
fields->SetField(PP_X509CERTIFICATE_PRIVATE_SUBJECT_COUNTRY_NAME,
new base::StringValue(subject.country_name));
fields->SetField(
PP_X509CERTIFICATE_PRIVATE_SUBJECT_ORGANIZATION_NAME,
new base::StringValue(
base::JoinString(subject.organization_names, "\n")));
fields->SetField(
PP_X509CERTIFICATE_PRIVATE_SUBJECT_ORGANIZATION_UNIT_NAME,
new base::StringValue(
base::JoinString(subject.organization_unit_names, "\n")));
const std::string& serial_number = cert.serial_number();
fields->SetField(PP_X509CERTIFICATE_PRIVATE_SERIAL_NUMBER,
base::BinaryValue::CreateWithCopiedBuffer(
serial_number.data(), serial_number.length()));
fields->SetField(PP_X509CERTIFICATE_PRIVATE_VALIDITY_NOT_BEFORE,
new base::FundamentalValue(cert.valid_start().ToDoubleT()));
fields->SetField(PP_X509CERTIFICATE_PRIVATE_VALIDITY_NOT_AFTER,
new base::FundamentalValue(cert.valid_expiry().ToDoubleT()));
std::string der;
net::X509Certificate::GetDEREncoded(cert.os_cert_handle(), &der);
fields->SetField(
PP_X509CERTIFICATE_PRIVATE_RAW,
base::BinaryValue::CreateWithCopiedBuffer(der.data(), der.length()));
return true;
}
bool GetCertificateFields(const char* der,
uint32_t length,
ppapi::PPB_X509Certificate_Fields* fields) {
scoped_refptr<net::X509Certificate> cert =
net::X509Certificate::CreateFromBytes(der, length);
if (!cert.get())
return false;
return GetCertificateFields(*cert.get(), fields);
}
#if defined(OS_CHROMEOS)
namespace {
const unsigned char kIPv4Empty[] = {0, 0, 0, 0};
const unsigned char kIPv6Empty[] =
{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
const unsigned char kIPv6Loopback[] =
{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1};
bool isLoopbackAddress(const net::IPAddressNumber& address) {
if (address.size() == net::kIPv4AddressSize) {
// The entire IPv4 subnet 127.0.0.0/8 is for loopback. See RFC3330.
return address[0] == 0x7f;
} else if (address.size() == net::kIPv6AddressSize) {
// ::1 is the only loopback address in ipv6.
return std::equal(&kIPv6Loopback[0], &kIPv6Loopback[net::kIPv6AddressSize],
address.begin());
}
return false;
}
std::string addressToFirewallString(const net::IPAddressNumber& address) {
if (address.empty()) {
return std::string();
}
if (address.size() == net::kIPv4AddressSize &&
std::equal(&kIPv4Empty[0], &kIPv4Empty[net::kIPv4AddressSize],
address.begin())) {
return std::string();
}
if (address.size() == net::kIPv6AddressSize &&
std::equal(&kIPv6Empty[0], &kIPv6Empty[net::kIPv6AddressSize],
address.begin())) {
return std::string();
}
return net::IPAddressToString(address);
}
} // namespace
void OpenFirewallHole(const net::IPEndPoint& address,
chromeos::FirewallHole::PortType type,
FirewallHoleOpenCallback callback) {
if (isLoopbackAddress(address.address())) {
callback.Run(nullptr);
return;
}
std::string address_string = addressToFirewallString(address.address());
chromeos::FirewallHole::Open(type, address.port(), address_string, callback);
}
void OpenTCPFirewallHole(const net::IPEndPoint& address,
FirewallHoleOpenCallback callback) {
OpenFirewallHole(address, chromeos::FirewallHole::PortType::TCP, callback);
}
void OpenUDPFirewallHole(const net::IPEndPoint& address,
FirewallHoleOpenCallback callback) {
OpenFirewallHole(address, chromeos::FirewallHole::PortType::UDP, callback);
}
#endif // defined(OS_CHROMEOS)
} // namespace pepper_socket_utils
} // namespace content
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