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// Copyright 2014 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 "extensions/common/permissions/permission_message_util.h"
#include "base/macros.h"
#include "base/strings/string_number_conversions.h"
#include "base/strings/string_split.h"
#include "base/strings/utf_string_conversions.h"
#include "extensions/common/permissions/coalesced_permission_message.h"
#include "extensions/common/permissions/permission_message.h"
#include "extensions/common/permissions/permission_set.h"
#include "extensions/common/url_pattern_set.h"
#include "grit/extensions_strings.h"
#include "net/base/registry_controlled_domains/registry_controlled_domain.h"
#include "ui/base/l10n/l10n_util.h"
#include "url/url_constants.h"
using extensions::PermissionMessage;
using extensions::URLPatternSet;
namespace {
// Helper for GetDistinctHosts(): com > net > org > everything else.
bool RcdBetterThan(const std::string& a, const std::string& b) {
if (a == b)
return false;
if (a == "com")
return true;
if (a == "net")
return b != "com";
if (a == "org")
return b != "com" && b != "net";
return false;
}
} // namespace
namespace permission_message_util {
// The number of host messages supported. The first N - 1 of these messages are
// specific for the number of hosts; the last one is a catch-all for N or more
// hosts.
static const int kNumMessages = 4;
std::vector<base::string16> GetHostListFromHosts(
const std::set<std::string>& hosts,
PermissionMessageProperties properties) {
int host_msg_id = hosts.size() < kNumMessages
? IDS_EXTENSION_PROMPT_WARNING_HOST_AND_SUBDOMAIN
: IDS_EXTENSION_PROMPT_WARNING_HOST_AND_SUBDOMAIN_LIST;
std::vector<base::string16> host_list;
for (std::set<std::string>::const_iterator it = hosts.begin();
it != hosts.end();
++it) {
std::string host = *it;
host_list.push_back(
host[0] == '*' && host[1] == '.'
? l10n_util::GetStringFUTF16(host_msg_id,
base::UTF8ToUTF16(host.erase(0, 2)))
: base::UTF8ToUTF16(host));
}
DCHECK(host_list.size());
return host_list;
}
PermissionMessage CreateFromHostList(const std::set<std::string>& hosts,
PermissionMessageProperties properties) {
typedef std::pair<PermissionMessage::ID, int> MsgPair;
static const MsgPair kReadWriteMessagesList[] = {
std::make_pair(PermissionMessage::kHosts1,
IDS_EXTENSION_PROMPT_WARNING_1_HOST),
std::make_pair(PermissionMessage::kHosts2,
IDS_EXTENSION_PROMPT_WARNING_2_HOSTS),
std::make_pair(PermissionMessage::kHosts3,
IDS_EXTENSION_PROMPT_WARNING_3_HOSTS),
std::make_pair(PermissionMessage::kHosts4OrMore,
IDS_EXTENSION_PROMPT_WARNING_HOSTS_LIST)};
static const MsgPair kReadOnlyMessagesList[] = {
std::make_pair(PermissionMessage::kHosts1ReadOnly,
IDS_EXTENSION_PROMPT_WARNING_1_HOST_READ_ONLY),
std::make_pair(PermissionMessage::kHosts2ReadOnly,
IDS_EXTENSION_PROMPT_WARNING_2_HOSTS_READ_ONLY),
std::make_pair(PermissionMessage::kHosts3ReadOnly,
IDS_EXTENSION_PROMPT_WARNING_3_HOSTS_READ_ONLY),
std::make_pair(PermissionMessage::kHosts4OrMoreReadOnly,
IDS_EXTENSION_PROMPT_WARNING_HOSTS_LIST_READ_ONLY)};
static_assert(
arraysize(kReadWriteMessagesList) == arraysize(kReadOnlyMessagesList),
"message lists should be of different size");
static_assert(kNumMessages == arraysize(kReadWriteMessagesList),
"messages array should be of different size");
const MsgPair(&messages_list)[kNumMessages] =
properties == kReadOnly ? kReadOnlyMessagesList : kReadWriteMessagesList;
std::vector<base::string16> host_list =
GetHostListFromHosts(hosts, properties);
if (host_list.size() < kNumMessages) {
return PermissionMessage(
messages_list[host_list.size() - 1].first,
l10n_util::GetStringFUTF16(messages_list[host_list.size() - 1].second,
host_list, NULL));
}
base::string16 details;
for (size_t i = 0; i < host_list.size(); ++i) {
if (i > 0)
details += base::ASCIIToUTF16("\n");
details += host_list[i];
}
return PermissionMessage(
messages_list[arraysize(messages_list) - 1].first,
l10n_util::GetStringUTF16(
messages_list[arraysize(messages_list) - 1].second),
details);
}
void AddHostPermissions(extensions::PermissionIDSet* permissions,
const std::set<std::string>& hosts,
PermissionMessageProperties properties) {
std::vector<base::string16> host_list =
GetHostListFromHosts(hosts, properties);
// Create a separate permission for each host, and add it to the permissions
// list.
// TODO(sashab): Add coalescing rules for kHostReadOnly and kHostReadWrite
// to mimic the current behavior of CreateFromHostList() above.
for (const auto& host : host_list) {
permissions->insert(properties == kReadOnly
? extensions::APIPermission::kHostReadOnly
: extensions::APIPermission::kHostReadWrite,
host);
}
}
std::set<std::string> GetDistinctHosts(const URLPatternSet& host_patterns,
bool include_rcd,
bool exclude_file_scheme) {
// Use a vector to preserve order (also faster than a map on small sets).
// Each item is a host split into two parts: host without RCDs and
// current best RCD.
typedef base::StringPairs HostVector;
HostVector hosts_best_rcd;
for (URLPatternSet::const_iterator i = host_patterns.begin();
i != host_patterns.end();
++i) {
if (exclude_file_scheme && i->scheme() == url::kFileScheme)
continue;
std::string host = i->host();
// Add the subdomain wildcard back to the host, if necessary.
if (i->match_subdomains())
host = "*." + host;
// If the host has an RCD, split it off so we can detect duplicates.
std::string rcd;
size_t reg_len = net::registry_controlled_domains::GetRegistryLength(
host,
net::registry_controlled_domains::EXCLUDE_UNKNOWN_REGISTRIES,
net::registry_controlled_domains::EXCLUDE_PRIVATE_REGISTRIES);
if (reg_len && reg_len != std::string::npos) {
if (include_rcd) // else leave rcd empty
rcd = host.substr(host.size() - reg_len);
host = host.substr(0, host.size() - reg_len);
}
// Check if we've already seen this host.
HostVector::iterator it = hosts_best_rcd.begin();
for (; it != hosts_best_rcd.end(); ++it) {
if (it->first == host)
break;
}
// If this host was found, replace the RCD if this one is better.
if (it != hosts_best_rcd.end()) {
if (include_rcd && RcdBetterThan(rcd, it->second))
it->second = rcd;
} else { // Previously unseen host, append it.
hosts_best_rcd.push_back(std::make_pair(host, rcd));
}
}
// Build up the final vector by concatenating hosts and RCDs.
std::set<std::string> distinct_hosts;
for (HostVector::iterator it = hosts_best_rcd.begin();
it != hosts_best_rcd.end();
++it)
distinct_hosts.insert(it->first + it->second);
return distinct_hosts;
}
} // namespace permission_message_util
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