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// Copyright 2024 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/enterprise/connectors/core/enterprise_interstitial_util.h"
#include "base/strings/strcat.h"
#include "base/strings/utf_string_conversions.h"
#include "components/safe_browsing/core/common/features.h"
#include "url/gurl.h"
namespace enterprise_connectors {
namespace {
std::u16string GetCustomMessageFromNavigationRule(
const safe_browsing::MatchedUrlNavigationRule& rule) {
std::u16string custom_message = u"";
if (rule.has_custom_message()) {
for (const auto& custom_segment :
rule.custom_message().message_segments()) {
if (custom_segment.has_link() && GURL(custom_segment.link()).is_valid()) {
base::StrAppend(&custom_message,
{u"<a target=\"_blank\" href=\"",
base::UTF8ToUTF16(custom_segment.link()), u"\">",
base::UTF8ToUTF16(custom_segment.text()), u"</a>"});
} else {
base::StrAppend(&custom_message,
{base::UTF8ToUTF16(custom_segment.text())});
}
}
}
return custom_message;
}
} // namespace
std::u16string GetUrlFilteringCustomMessage(
const std::vector<security_interstitials::UnsafeResource>&
unsafe_resources) {
std::u16string custom_message = u"";
int highest_severity_verdict = 0;
if (!unsafe_resources.empty() &&
!unsafe_resources[0].rt_lookup_response.threat_info().empty()) {
const auto& threat_infos =
unsafe_resources[0].rt_lookup_response.threat_info();
// If it exists, We pick a non-empty custom message from all matched rules
// at the same highest severity level.
for (const auto& threat_info : threat_infos) {
if (!threat_info.has_matched_url_navigation_rule() ||
!threat_info.has_verdict_type()) {
continue;
}
int current_verdict = static_cast<int>(threat_info.verdict_type());
// Verdict type is an enum from 1 to 100 representing the danger
// confidence level.
if (current_verdict >= highest_severity_verdict) {
std::u16string message = GetCustomMessageFromNavigationRule(
threat_info.matched_url_navigation_rule());
if (!message.empty()) {
custom_message = message;
}
highest_severity_verdict = current_verdict;
}
}
}
return custom_message;
}
} // namespace enterprise_connectors
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