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// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/origin_matcher/origin_matcher.h"
#include "base/containers/adapters.h"
#include "base/strings/string_util.h"
#include "components/origin_matcher/origin_matcher_internal.h"
#include "net/base/ip_address.h"
#include "net/base/ip_endpoint.h"
#include "net/base/parse_number.h"
#include "net/base/url_util.h"
#include "url/gurl.h"
#include "url/origin.h"
#include "url/url_constants.h"
#include "url/url_util.h"
namespace origin_matcher {
namespace {
inline int GetDefaultPortForSchemeIfNoPortInfo(const std::string& scheme,
int port) {
// The input has explicit port information, so don't modify it.
if (port != -1) {
return port;
}
// Hard code the port for http and https.
if (scheme == url::kHttpScheme) {
return 80;
}
if (scheme == url::kHttpsScheme) {
return 443;
}
return port;
}
} // namespace
OriginMatcher::OriginMatcher() = default;
// Allow copy and assign.
OriginMatcher::OriginMatcher(OriginMatcher&&) = default;
OriginMatcher& OriginMatcher::operator=(OriginMatcher&&) = default;
OriginMatcher::~OriginMatcher() = default;
OriginMatcher::OriginMatcher(const OriginMatcher& rhs) {
*this = rhs;
}
OriginMatcher& OriginMatcher::operator=(const OriginMatcher& rhs) {
rules_.clear();
for (const auto& rule : rhs.Serialize()) {
AddRuleFromString(rule);
}
return *this;
}
void OriginMatcher::SetRules(RuleList rules) {
rules_.swap(rules);
}
void OriginMatcher::MoveRules(OriginMatcher& matcher) {
rules_ = std::move(matcher.rules_);
}
bool OriginMatcher::AddRuleFromString(const std::string& raw_untrimmed) {
std::string raw;
base::TrimWhitespaceASCII(raw_untrimmed, base::TRIM_ALL, &raw);
if (raw == "*") {
rules_.push_back(std::make_unique<MatchAllOriginsRule>());
return true;
}
// Extract scheme-restriction.
std::string::size_type scheme_pos = raw.find("://");
if (scheme_pos == std::string::npos) {
return false;
}
const std::string scheme = raw.substr(0, scheme_pos);
if (!SubdomainMatchingRule::IsValidScheme(scheme)) {
return false;
}
std::string host_and_port = raw.substr(scheme_pos + 3);
if (host_and_port.empty()) {
if (!SubdomainMatchingRule::IsValidSchemeAndHost(scheme, std::string())) {
return false;
}
rules_.push_back(
std::make_unique<SubdomainMatchingRule>(scheme, std::string(), -1));
return true;
}
std::string host;
int port;
if (!net::ParseHostAndPort(host_and_port, &host, &port) ||
!SubdomainMatchingRule::IsValidSchemeAndHost(scheme, host)) {
return false;
}
// Check if we have an <ip-address>[:port] input and try to canonicalize the
// IP literal.
net::IPAddress ip_address;
if (ip_address.AssignFromIPLiteral(host)) {
port = GetDefaultPortForSchemeIfNoPortInfo(scheme, port);
host = ip_address.ToString();
if (ip_address.IsIPv6()) {
host = '[' + host + ']';
}
rules_.push_back(
std::make_unique<SubdomainMatchingRule>(scheme, host, port));
return true;
}
port = GetDefaultPortForSchemeIfNoPortInfo(scheme, port);
rules_.push_back(std::make_unique<SubdomainMatchingRule>(scheme, host, port));
return true;
}
bool OriginMatcher::Matches(const url::Origin& origin) const {
GURL origin_url = origin.GetURL();
// Since we only do kInclude vs kNoMatch, the order doesn't actually matter.
for (const std::unique_ptr<OriginMatcherRule>& rule :
base::Reversed(rules_)) {
net::SchemeHostPortMatcherResult result = rule->Evaluate(origin_url);
if (result == net::SchemeHostPortMatcherResult::kInclude) {
return true;
}
}
return false;
}
std::vector<std::string> OriginMatcher::Serialize() const {
std::vector<std::string> result;
result.reserve(rules_.size());
for (const auto& rule : rules_) {
result.push_back(rule->ToString());
}
return result;
}
} // namespace origin_matcher
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