2692db8699
Note that as of this commit, there aren't any such throwers, and the call site in Heap::allocate will drop exceptions on the floor. This commit only serves to change the declaration of the overrides, make sure they return an empty value, and to propagate OOM errors frm their base initialize invocations.
101 lines
3.8 KiB
C++
101 lines
3.8 KiB
C++
/*
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* Copyright (c) 2021-2022, Linus Groh <linusg@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <LibCrypto/Hash/HashManager.h>
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#include <LibJS/Runtime/ArrayBuffer.h>
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#include <LibJS/Runtime/Promise.h>
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#include <LibWeb/Bindings/Intrinsics.h>
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#include <LibWeb/Crypto/SubtleCrypto.h>
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#include <LibWeb/WebIDL/AbstractOperations.h>
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#include <LibWeb/WebIDL/DOMException.h>
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namespace Web::Crypto {
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JS::NonnullGCPtr<SubtleCrypto> SubtleCrypto::create(JS::Realm& realm)
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{
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return realm.heap().allocate<SubtleCrypto>(realm, realm);
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}
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SubtleCrypto::SubtleCrypto(JS::Realm& realm)
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: PlatformObject(realm)
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{
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}
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SubtleCrypto::~SubtleCrypto() = default;
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JS::ThrowCompletionOr<void> SubtleCrypto::initialize(JS::Realm& realm)
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{
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MUST_OR_THROW_OOM(Base::initialize(realm));
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set_prototype(&Bindings::ensure_web_prototype<Bindings::SubtleCryptoPrototype>(realm, "SubtleCrypto"));
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return {};
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}
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// https://w3c.github.io/webcrypto/#dfn-SubtleCrypto-method-digest
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JS::Promise* SubtleCrypto::digest(DeprecatedString const& algorithm, JS::Handle<JS::Object> const& data)
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{
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auto& realm = this->realm();
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// 1. Let algorithm be the algorithm parameter passed to the digest() method.
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// 2. Let data be the result of getting a copy of the bytes held by the data parameter passed to the digest() method.
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auto data_buffer_or_error = WebIDL::get_buffer_source_copy(*data.cell());
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if (data_buffer_or_error.is_error()) {
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auto error = WebIDL::OperationError::create(realm, "Failed to copy bytes from ArrayBuffer");
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auto promise = JS::Promise::create(realm);
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promise->reject(error.ptr());
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return promise;
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}
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auto& data_buffer = data_buffer_or_error.value();
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// 3. Let normalizedAlgorithm be the result of normalizing an algorithm, with alg set to algorithm and op set to "digest".
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// FIXME: This is way more generic than it needs to be right now, so we simplify it.
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::Crypto::Hash::HashKind hash_kind;
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if (algorithm.equals_ignoring_case("SHA-1"sv)) {
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hash_kind = ::Crypto::Hash::HashKind::SHA1;
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} else if (algorithm.equals_ignoring_case("SHA-256"sv)) {
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hash_kind = ::Crypto::Hash::HashKind::SHA256;
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} else if (algorithm.equals_ignoring_case("SHA-384"sv)) {
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hash_kind = ::Crypto::Hash::HashKind::SHA384;
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} else if (algorithm.equals_ignoring_case("SHA-512"sv)) {
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hash_kind = ::Crypto::Hash::HashKind::SHA512;
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}
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// 4. If an error occurred, return a Promise rejected with normalizedAlgorithm.
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else {
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auto error = WebIDL::NotSupportedError::create(realm, DeprecatedString::formatted("Invalid hash function '{}'", algorithm));
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auto promise = JS::Promise::create(realm);
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promise->reject(error.ptr());
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return promise;
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}
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// 5. Let promise be a new Promise.
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auto promise = JS::Promise::create(realm);
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// 6. Return promise and perform the remaining steps in parallel.
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// FIXME: We don't have a good abstraction for this yet, so we do it in sync.
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// 7. If the following steps or referenced procedures say to throw an error, reject promise with the returned error and then terminate the algorithm.
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// 8. Let result be the result of performing the digest operation specified by normalizedAlgorithm using algorithm, with data as message.
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::Crypto::Hash::Manager hash { hash_kind };
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hash.update(data_buffer);
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auto digest = hash.digest();
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auto result_buffer = ByteBuffer::copy(digest.immutable_data(), hash.digest_size());
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if (result_buffer.is_error()) {
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auto error = WebIDL::OperationError::create(realm, "Failed to create result buffer");
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promise->reject(error.ptr());
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return promise;
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}
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auto result = JS::ArrayBuffer::create(realm, result_buffer.release_value());
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// 9. Resolve promise with result.
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promise->fulfill(result);
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return promise;
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}
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}
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