/* * Copyright (c) 2021, Tim Flynn * * SPDX-License-Identifier: BSD-2-Clause */ #include "CookieJar.h" #include #include #include #include #include namespace Browser { String CookieJar::get_cookie(const URL& url, Web::Cookie::Source source) { purge_expired_cookies(); auto domain = canonicalize_domain(url); if (!domain.has_value()) return {}; auto cookie_list = get_matching_cookies(url, domain.value(), source); StringBuilder builder; for (const auto& cookie : cookie_list) { // If there is an unprocessed cookie in the cookie-list, output the characters %x3B and %x20 ("; ") if (!builder.is_empty()) builder.append("; "); // Output the cookie's name, the %x3D ("=") character, and the cookie's value. builder.appendff("{}={}", cookie.name, cookie.value); } return builder.build(); } void CookieJar::set_cookie(const URL& url, const Web::Cookie::ParsedCookie& parsed_cookie, Web::Cookie::Source source) { auto domain = canonicalize_domain(url); if (!domain.has_value()) return; store_cookie(parsed_cookie, url, move(domain.value()), source); purge_expired_cookies(); } void CookieJar::dump_cookies() const { static const char* key_color = "\033[34;1m"; static const char* attribute_color = "\033[33m"; static const char* no_color = "\033[0m"; StringBuilder builder; builder.appendff("{} cookies stored\n", m_cookies.size()); for (const auto& cookie : m_cookies) { builder.appendff("{}{}{} - ", key_color, cookie.key.name, no_color); builder.appendff("{}{}{} - ", key_color, cookie.key.domain, no_color); builder.appendff("{}{}{}\n", key_color, cookie.key.path, no_color); builder.appendff("\t{}Value{} = {}\n", attribute_color, no_color, cookie.value.value); builder.appendff("\t{}CreationTime{} = {}\n", attribute_color, no_color, cookie.value.creation_time.to_string()); builder.appendff("\t{}LastAccessTime{} = {}\n", attribute_color, no_color, cookie.value.last_access_time.to_string()); builder.appendff("\t{}ExpiryTime{} = {}\n", attribute_color, no_color, cookie.value.expiry_time.to_string()); builder.appendff("\t{}Secure{} = {:s}\n", attribute_color, no_color, cookie.value.secure); builder.appendff("\t{}HttpOnly{} = {:s}\n", attribute_color, no_color, cookie.value.http_only); builder.appendff("\t{}HostOnly{} = {:s}\n", attribute_color, no_color, cookie.value.host_only); builder.appendff("\t{}Persistent{} = {:s}\n", attribute_color, no_color, cookie.value.persistent); } dbgln("{}", builder.build()); } Optional CookieJar::canonicalize_domain(const URL& url) { // https://tools.ietf.org/html/rfc6265#section-5.1.2 if (!url.is_valid()) return {}; // FIXME: Implement RFC 5890 to "Convert each label that is not a Non-Reserved LDH (NR-LDH) label to an A-label". return url.host().to_lowercase(); } bool CookieJar::domain_matches(const String& string, const String& domain_string) { // https://tools.ietf.org/html/rfc6265#section-5.1.3 // A string domain-matches a given domain string if at least one of the following conditions hold: // The domain string and the string are identical. if (string == domain_string) return true; // All of the following conditions hold: // - The domain string is a suffix of the string. // - The last character of the string that is not included in the domain string is a %x2E (".") character. // - The string is a host name (i.e., not an IP address). if (!string.ends_with(domain_string)) return false; if (string[string.length() - domain_string.length() - 1] != '.') return false; if (AK::IPv4Address::from_string(string).has_value()) return false; return true; } bool CookieJar::path_matches(const String& request_path, const String& cookie_path) { // https://tools.ietf.org/html/rfc6265#section-5.1.4 // A request-path path-matches a given cookie-path if at least one of the following conditions holds: // The cookie-path and the request-path are identical. if (request_path == cookie_path) return true; if (request_path.starts_with(cookie_path)) { // The cookie-path is a prefix of the request-path, and the last character of the cookie-path is %x2F ("/"). if (cookie_path.ends_with('/')) return true; // The cookie-path is a prefix of the request-path, and the first character of the request-path that is not included in the cookie-path is a %x2F ("/") character. if (request_path[cookie_path.length()] == '/') return true; } return false; } String CookieJar::default_path(const URL& url) { // https://tools.ietf.org/html/rfc6265#section-5.1.4 // 1. Let uri-path be the path portion of the request-uri if such a portion exists (and empty otherwise). String uri_path = url.path(); // 2. If the uri-path is empty or if the first character of the uri-path is not a %x2F ("/") character, output %x2F ("/") and skip the remaining steps. if (uri_path.is_empty() || (uri_path[0] != '/')) return "/"; StringView uri_path_view = uri_path; std::size_t last_separator = uri_path_view.find_last_of('/').value(); // 3. If the uri-path contains no more than one %x2F ("/") character, output %x2F ("/") and skip the remaining step. if (last_separator == 0) return "/"; // 4. Output the characters of the uri-path from the first character up to, but not including, the right-most %x2F ("/"). return uri_path.substring(0, last_separator); } void CookieJar::store_cookie(const Web::Cookie::ParsedCookie& parsed_cookie, const URL& url, String canonicalized_domain, Web::Cookie::Source source) { // https://tools.ietf.org/html/rfc6265#section-5.3 // 2. Create a new cookie with name cookie-name, value cookie-value. Set the creation-time and the last-access-time to the current date and time. Web::Cookie::Cookie cookie { parsed_cookie.name, parsed_cookie.value }; cookie.creation_time = Core::DateTime::now(); cookie.last_access_time = cookie.creation_time; if (parsed_cookie.expiry_time_from_max_age_attribute.has_value()) { // 3. If the cookie-attribute-list contains an attribute with an attribute-name of "Max-Age": Set the cookie's persistent-flag to true. // Set the cookie's expiry-time to attribute-value of the last attribute in the cookie-attribute-list with an attribute-name of "Max-Age". cookie.persistent = true; cookie.expiry_time = parsed_cookie.expiry_time_from_max_age_attribute.value(); } else if (parsed_cookie.expiry_time_from_expires_attribute.has_value()) { // If the cookie-attribute-list contains an attribute with an attribute-name of "Expires": Set the cookie's persistent-flag to true. // Set the cookie's expiry-time to attribute-value of the last attribute in the cookie-attribute-list with an attribute-name of "Expires". cookie.persistent = true; cookie.expiry_time = parsed_cookie.expiry_time_from_expires_attribute.value(); } else { // Set the cookie's persistent-flag to false. Set the cookie's expiry-time to the latest representable gddate. cookie.persistent = false; cookie.expiry_time = Core::DateTime::create(9999, 12, 31, 23, 59, 59); } // 4. If the cookie-attribute-list contains an attribute with an attribute-name of "Domain": if (parsed_cookie.domain.has_value()) { // Let the domain-attribute be the attribute-value of the last attribute in the cookie-attribute-list with an attribute-name of "Domain". cookie.domain = parsed_cookie.domain.value(); } // 5. If the user agent is configured to reject "public suffixes" and the domain-attribute is a public suffix: // FIXME: Support rejection of public suffixes. The full list is here: https://publicsuffix.org/list/public_suffix_list.dat // 6. If the domain-attribute is non-empty: if (!cookie.domain.is_empty()) { // If the canonicalized request-host does not domain-match the domain-attribute: Ignore the cookie entirely and abort these steps. if (!domain_matches(canonicalized_domain, cookie.domain)) return; // Set the cookie's host-only-flag to false. Set the cookie's domain to the domain-attribute. cookie.host_only = false; } else { // Set the cookie's host-only-flag to true. Set the cookie's domain to the canonicalized request-host. cookie.host_only = true; cookie.domain = move(canonicalized_domain); } // 7. If the cookie-attribute-list contains an attribute with an attribute-name of "Path": if (parsed_cookie.path.has_value()) { // Set the cookie's path to attribute-value of the last attribute in the cookie-attribute-list with an attribute-name of "Path". cookie.path = parsed_cookie.path.value(); } else { cookie.path = default_path(url); } // 8. If the cookie-attribute-list contains an attribute with an attribute-name of "Secure", set the cookie's secure-only-flag to true. cookie.secure = parsed_cookie.secure_attribute_present; // 9. If the cookie-attribute-list contains an attribute with an attribute-name of "HttpOnly", set the cookie's http-only-flag to false. cookie.http_only = parsed_cookie.http_only_attribute_present; // 10. If the cookie was received from a "non-HTTP" API and the cookie's http-only-flag is set, abort these steps and ignore the cookie entirely. if (source != Web::Cookie::Source::Http && cookie.http_only) return; // 11. If the cookie store contains a cookie with the same name, domain, and path as the newly created cookie: CookieStorageKey key { cookie.name, cookie.domain, cookie.path }; if (auto old_cookie = m_cookies.find(key); old_cookie != m_cookies.end()) { // If the newly created cookie was received from a "non-HTTP" API and the old-cookie's http-only-flag is set, abort these // steps and ignore the newly created cookie entirely. if (source != Web::Cookie::Source::Http && old_cookie->value.http_only) return; // Update the creation-time of the newly created cookie to match the creation-time of the old-cookie. cookie.creation_time = old_cookie->value.creation_time; // Remove the old-cookie from the cookie store. m_cookies.remove(old_cookie); } // 12. Insert the newly created cookie into the cookie store. m_cookies.set(key, move(cookie)); } Vector CookieJar::get_matching_cookies(const URL& url, const String& canonicalized_domain, Web::Cookie::Source source) { // https://tools.ietf.org/html/rfc6265#section-5.4 auto now = Core::DateTime::now(); // 1. Let cookie-list be the set of cookies from the cookie store that meets all of the following requirements: Vector cookie_list; for (auto& cookie : m_cookies) { // Either: The cookie's host-only-flag is true and the canonicalized request-host is identical to the cookie's domain. // Or: The cookie's host-only-flag is false and the canonicalized request-host domain-matches the cookie's domain. bool is_host_only_and_has_identical_domain = cookie.value.host_only && (canonicalized_domain == cookie.value.domain); bool is_not_host_only_and_domain_matches = !cookie.value.host_only && domain_matches(canonicalized_domain, cookie.value.domain); if (!is_host_only_and_has_identical_domain && !is_not_host_only_and_domain_matches) continue; // The request-uri's path path-matches the cookie's path. if (!path_matches(url.path(), cookie.value.path)) continue; // If the cookie's secure-only-flag is true, then the request-uri's scheme must denote a "secure" protocol. if (cookie.value.secure && (url.protocol() != "https")) continue; // If the cookie's http-only-flag is true, then exclude the cookie if the cookie-string is being generated for a "non-HTTP" API. if (cookie.value.http_only && (source != Web::Cookie::Source::Http)) continue; // 2. The user agent SHOULD sort the cookie-list in the following order: // - Cookies with longer paths are listed before cookies with shorter paths. // - Among cookies that have equal-length path fields, cookies with earlier creation-times are listed before cookies with later creation-times. cookie_list.insert_before_matching(cookie.value, [&cookie](auto& entry) { if (cookie.value.path.length() > entry.path.length()) { return true; } else if (cookie.value.path.length() == entry.path.length()) { if (cookie.value.creation_time.timestamp() < entry.creation_time.timestamp()) return true; } return false; }); // 3. Update the last-access-time of each cookie in the cookie-list to the current date and time. cookie.value.last_access_time = now; } return cookie_list; } void CookieJar::purge_expired_cookies() { time_t now = Core::DateTime::now().timestamp(); Vector keys_to_evict; for (const auto& cookie : m_cookies) { if (cookie.value.expiry_time.timestamp() < now) keys_to_evict.append(cookie.key); } for (const auto& key : keys_to_evict) m_cookies.remove(key); } }