ladybird/Userland/Libraries/LibWeb/HTML/WindowOrWorkerGlobalScope.cpp
Luke Wilde cdc77407bf LibWeb: Make WindowOrWorkerGlobalScope#atob use forgiving base64 decode
This was forgotten to be changed when Window's atob was updated to use
forgiving base64 decode.
2023-03-07 18:45:12 +00:00

86 lines
3.7 KiB
C++

/*
* Copyright (c) 2022, Andrew Kaster <akaster@serenityos.org>
* Copyright (c) 2023, Linus Groh <linusg@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/Base64.h>
#include <AK/String.h>
#include <AK/Utf8View.h>
#include <AK/Vector.h>
#include <LibTextCodec/Decoder.h>
#include <LibWeb/Forward.h>
#include <LibWeb/HTML/WindowOrWorkerGlobalScope.h>
#include <LibWeb/Infra/Base64.h>
#include <LibWeb/WebIDL/DOMException.h>
#include <LibWeb/WebIDL/ExceptionOr.h>
namespace Web::HTML {
WindowOrWorkerGlobalScopeMixin::~WindowOrWorkerGlobalScopeMixin() = default;
// https://html.spec.whatwg.org/multipage/webappapis.html#dom-origin
WebIDL::ExceptionOr<String> WindowOrWorkerGlobalScopeMixin::origin() const
{
auto& vm = this_impl().vm();
// The origin getter steps are to return this's relevant settings object's origin, serialized.
return TRY_OR_THROW_OOM(vm, String::from_deprecated_string(relevant_settings_object(this_impl()).origin().serialize()));
}
// https://html.spec.whatwg.org/multipage/webappapis.html#dom-issecurecontext
bool WindowOrWorkerGlobalScopeMixin::is_secure_context() const
{
// The isSecureContext getter steps are to return true if this's relevant settings object is a secure context, or false otherwise.
return HTML::is_secure_context(relevant_settings_object(this_impl()));
}
// https://html.spec.whatwg.org/multipage/webappapis.html#dom-crossoriginisolated
bool WindowOrWorkerGlobalScopeMixin::cross_origin_isolated() const
{
// The crossOriginIsolated getter steps are to return this's relevant settings object's cross-origin isolated capability.
return relevant_settings_object(this_impl()).cross_origin_isolated_capability() == CanUseCrossOriginIsolatedAPIs::Yes;
}
// https://html.spec.whatwg.org/multipage/webappapis.html#dom-btoa
WebIDL::ExceptionOr<String> WindowOrWorkerGlobalScopeMixin::btoa(String const& data) const
{
auto& vm = this_impl().vm();
auto& realm = *vm.current_realm();
// The btoa(data) method must throw an "InvalidCharacterError" DOMException if data contains any character whose code point is greater than U+00FF.
Vector<u8> byte_string;
byte_string.ensure_capacity(data.bytes().size());
for (u32 code_point : Utf8View(data)) {
if (code_point > 0xff)
return WebIDL::InvalidCharacterError::create(realm, "Data contains characters outside the range U+0000 and U+00FF");
byte_string.append(code_point);
}
// Otherwise, the user agent must convert data to a byte sequence whose nth byte is the eight-bit representation of the nth code point of data,
// and then must apply forgiving-base64 encode to that byte sequence and return the result.
return TRY_OR_THROW_OOM(vm, encode_base64(byte_string.span()));
}
// https://html.spec.whatwg.org/multipage/webappapis.html#dom-atob
WebIDL::ExceptionOr<String> WindowOrWorkerGlobalScopeMixin::atob(String const& data) const
{
auto& vm = this_impl().vm();
auto& realm = *vm.current_realm();
// 1. Let decodedData be the result of running forgiving-base64 decode on data.
auto decoded_data = Infra::decode_forgiving_base64(data.bytes_as_string_view());
// 2. If decodedData is failure, then throw an "InvalidCharacterError" DOMException.
if (decoded_data.is_error())
return WebIDL::InvalidCharacterError::create(realm, "Input string is not valid base64 data");
// 3. Return decodedData.
// decode_base64() returns a byte string. LibJS uses UTF-8 for strings. Use Latin1Decoder to convert bytes 128-255 to UTF-8.
auto decoder = TextCodec::decoder_for("windows-1252"sv);
VERIFY(decoder.has_value());
return TRY_OR_THROW_OOM(vm, decoder->to_utf8(decoded_data.value()));
}
}