mirror of
https://github.com/RGBCube/serenity
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45cf40653a
Apologies for the enormous commit, but I don't see a way to split this up nicely. In the vast majority of cases it's a simple change. A few extra places can use TRY instead of manual error checking though. :^)
80 lines
3.3 KiB
C++
80 lines
3.3 KiB
C++
/*
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* Copyright (c) 2021, 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/DOMExceptionWrapper.h>
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#include <LibWeb/Bindings/IDLAbstractOperations.h>
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#include <LibWeb/Bindings/Wrapper.h>
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#include <LibWeb/Crypto/SubtleCrypto.h>
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#include <LibWeb/DOM/DOMException.h>
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namespace Web::Crypto {
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JS::Promise* SubtleCrypto::digest(String const& algorithm, JS::Handle<JS::Object> const& data)
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{
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auto& global_object = wrapper()->global_object();
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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 = Bindings::IDL::get_buffer_source_copy(*data.cell());
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if (!data_buffer.has_value()) {
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auto* error = wrap(wrapper()->global_object(), DOM::OperationError::create("Failed to copy bytes from ArrayBuffer"));
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auto* promise = JS::Promise::create(global_object);
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promise->reject(error);
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return promise;
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}
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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 = wrap(wrapper()->global_object(), DOM::NotSupportedError::create(String::formatted("Invalid hash function '{}'", algorithm)));
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auto* promise = JS::Promise::create(global_object);
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promise->reject(error);
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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(global_object);
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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 = wrap(wrapper()->global_object(), DOM::OperationError::create("Failed to create result buffer"));
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promise->reject(error);
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return promise;
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}
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auto* result = JS::ArrayBuffer::create(global_object, 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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