Support socket endpoint permissions for AppsV2 Socket API.

chrome/common/extensions/permissions/socket_permission_data.cc

+// 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 "chrome/common/extensions/permissions/socket_permission_data.h"
+
+#include <cstdlib>
+#include <sstream>
+#include <vector>
+
+#include "base/logging.h"
+#include "base/string_number_conversions.h"
+#include "base/string_split.h"
+#include "base/string_util.h"
+#include "googleurl/src/url_canon.h"
+
+namespace {
+
+using extensions::SocketPermissionData;
+
+const char kColon = ':';
+const char kDot = '.';
+const char kWildcard[] = "*";
+const char kInvalid[] = "invalid";
+const char kTCPConnect[] = "tcp-connect";
+const char kTCPListen[] = "tcp-listen";
+const char kUDPBind[] = "udp-bind";
+const char kUDPSendTo[] = "udp-send-to";
+const int kAnyPort = 0;
+const int kInvalidPort = -1;
+
+SocketPermissionData::OperationType StringToType(const std::string& s) {
+  if (s == kTCPConnect)
+    return SocketPermissionData::TCP_CONNECT;
+  if (s == kTCPListen)
+    return SocketPermissionData::TCP_LISTEN;
+  if (s == kUDPBind)
+    return SocketPermissionData::UDP_BIND;
+  if (s == kUDPSendTo)
+    return SocketPermissionData::UDP_SEND_TO;
+  return SocketPermissionData::NONE;
+}
+
+const char* TypeToString(SocketPermissionData::OperationType type) {
+  switch (type) {
+    case SocketPermissionData::TCP_CONNECT:
+      return kTCPConnect;
+    case SocketPermissionData::TCP_LISTEN:
+      return kTCPListen;
+    case SocketPermissionData::UDP_BIND:
+      return kUDPBind;
+    case SocketPermissionData::UDP_SEND_TO:
+      return kUDPSendTo;
+    default:
+      return kInvalid;
+  }
+}
+
+bool StartsOrEndsWithWhitespace(const std::string& str) {
+  if (str.find_first_not_of(kWhitespaceASCII) != 0)
+    return true;
+  if (str.find_last_not_of(kWhitespaceASCII) != str.length() - 1)
+    return true;
+  return false;
+}
+
+}  // namespace
+
+namespace extensions {
+
+SocketPermissionData::SocketPermissionData() {
+  Reset();
+}
+
+SocketPermissionData::~SocketPermissionData() {
+}
+
+bool SocketPermissionData::operator<(const SocketPermissionData& rhs) const {
+  if (type_ < rhs.type_)
+    return true;
+  if (type_ > rhs.type_)
+    return false;
+
+  if (host_ < rhs.host_)
+    return true;
+  if (host_ > rhs.host_)
+    return false;
+
+  if (match_subdomains_ < rhs.match_subdomains_)
+    return true;
+  if (match_subdomains_ > rhs.match_subdomains_)
+    return false;
+
+  if (port_ < rhs.port_)
+    return true;
+  return false;
+}
+
+bool SocketPermissionData::operator==(const SocketPermissionData& rhs) const {
+  return (type_ == rhs.type_) && (host_ == rhs.host_) &&
+      (match_subdomains_ == rhs.match_subdomains_) &&
+      (port_ == rhs.port_);
+}
+
+bool SocketPermissionData::Match(
+    OperationType type, const std::string& host, int port) const {
+  if (type_ != type)
+    return false;
+
+  std::string lhost = StringToLowerASCII(host);
+  if (host_ != lhost) {
+    if (!match_subdomains_)
+      return false;
+
+    if (!host_.empty()) {
+      // Do not wildcard part of IP address.
+      url_parse::Component component(0, lhost.length());
+      url_canon::RawCanonOutputT<char, 128> ignored_output;
+      url_canon::CanonHostInfo host_info;
+      url_canon::CanonicalizeIPAddress(lhost.c_str(), component,
+                                       &ignored_output, &host_info);
+      if (host_info.IsIPAddress())
+        return false;
+
+      // host should equal one or more chars + "." +  host_.
+      int i = lhost.length() - host_.length();
+      if (i < 2)
+        return false;
+
+      if (lhost.compare(i, host_.length(), host_) != 0)
+        return false;
+
+      if (lhost[i - 1] != kDot)
+        return false;
+    }
+  }
+
+  if (port_ != port && port_ != kAnyPort)
+    return false;
+
+  return true;
+}
+
+bool SocketPermissionData::Parse(const std::string& permission) {
+  do {
+    host_.clear();
+    match_subdomains_ = true;
+    port_ = kAnyPort;
+    spec_.clear();
+
+    std::vector<std::string> tokens;
+    base::SplitStringDontTrim(permission, kColon, &tokens);
+
+    if (tokens.empty() || tokens.size() > 3)
+      break;
+
+    type_ = StringToType(tokens[0]);
+    if (type_ == NONE)
+      break;
+
+    if (tokens.size() == 1)
+      return true;
+
+    host_ = tokens[1];
+    if (!host_.empty()) {
+      if (StartsOrEndsWithWhitespace(host_))
+        break;
+      host_ = StringToLowerASCII(host_);
+
+      // The first component can optionally be '*' to match all subdomains.
+      std::vector<std::string> host_components;
+      base::SplitString(host_, kDot, &host_components);
+      DCHECK(!host_components.empty());
+
+      if (host_components[0] == kWildcard || host_components[0].empty()) {
+        host_components.erase(host_components.begin(),
+                              host_components.begin() + 1);
+      } else {
+        match_subdomains_ = false;
+      }
+      host_ = JoinString(host_components, kDot);
+    }
+
+    if (tokens.size() == 2 || tokens[2].empty() || tokens[2] == kWildcard)
+      return true;
+
+    if (StartsOrEndsWithWhitespace(tokens[2]))
+      break;
+
+    if (!base::StringToInt(tokens[2], &port_) ||
+        port_ < 1 || port_ > 65535)
+      break;
+    return true;
+  } while (false);
+
+  Reset();
+  return false;
+}
+
+const std::string& SocketPermissionData::GetAsString() const {
+  if (!spec_.empty())
+    return spec_;
+
+  spec_.reserve(64);
+  spec_.append(TypeToString(type_));
+
+  if (match_subdomains_) {
+    spec_.append(1, kColon).append(kWildcard);
+    if (!host_.empty())
+      spec_.append(1, kDot).append(host_);
+  } else {
+     spec_.append(1, kColon).append(host_);
+  }
+
+  if (port_ == kAnyPort)
+    spec_.append(1, kColon).append(kWildcard);
+  else
+    spec_.append(1, kColon).append(base::IntToString(port_));
+
+  return spec_;
+}
+
+void SocketPermissionData::Reset() {
+  type_ = NONE;
+  host_.clear();
+  match_subdomains_ = false;
+  port_ = kInvalidPort;
+  spec_.clear();
+}
+
+}  // namespace extensions