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e3d6b66d5f
* clippy: Fix `match_like_matches` warnings * Fix link to custom element state in specification. --------- Co-authored-by: Martin Robinson <mrobinson@igalia.com>
77 lines
2.4 KiB
Rust
77 lines
2.4 KiB
Rust
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at https://mozilla.org/MPL/2.0/. */
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use dom_struct::dom_struct;
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use js::jsapi::{JSObject, Type};
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use js::rust::CustomAutoRooterGuard;
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use js::typedarray::{ArrayBufferView, ArrayBufferViewU8, TypedArray};
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use servo_rand::{RngCore, ServoRng};
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use crate::dom::bindings::cell::DomRefCell;
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use crate::dom::bindings::codegen::Bindings::CryptoBinding::CryptoMethods;
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use crate::dom::bindings::error::{Error, Fallible};
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use crate::dom::bindings::reflector::{reflect_dom_object, Reflector};
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use crate::dom::bindings::root::DomRoot;
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use crate::dom::globalscope::GlobalScope;
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use crate::script_runtime::JSContext;
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// https://developer.mozilla.org/en-US/docs/Web/API/Crypto
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#[dom_struct]
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pub struct Crypto {
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reflector_: Reflector,
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#[ignore_malloc_size_of = "Defined in rand"]
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#[no_trace]
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rng: DomRefCell<ServoRng>,
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}
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impl Crypto {
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fn new_inherited() -> Crypto {
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Crypto {
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reflector_: Reflector::new(),
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rng: DomRefCell::new(ServoRng::default()),
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}
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}
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pub fn new(global: &GlobalScope) -> DomRoot<Crypto> {
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reflect_dom_object(Box::new(Crypto::new_inherited()), global)
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}
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}
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impl CryptoMethods for Crypto {
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#[allow(unsafe_code)]
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// https://dvcs.w3.org/hg/webcrypto-api/raw-file/tip/spec/Overview.html#Crypto-method-getRandomValues
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fn GetRandomValues(
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&self,
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_cx: JSContext,
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mut input: CustomAutoRooterGuard<ArrayBufferView>,
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) -> Fallible<ArrayBufferView> {
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let array_type = input.get_array_type();
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if !is_integer_buffer(array_type) {
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Err(Error::TypeMismatch)
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} else {
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let data = unsafe { input.as_mut_slice() };
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if data.len() > 65536 {
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return Err(Error::QuotaExceeded);
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}
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self.rng.borrow_mut().fill_bytes(data);
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let underlying_object = unsafe { input.underlying_object() };
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TypedArray::<ArrayBufferViewU8, *mut JSObject>::from(*underlying_object)
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.map_err(|_| Error::JSFailed)
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}
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}
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}
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fn is_integer_buffer(array_type: Type) -> bool {
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matches!(
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array_type,
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Type::Uint8 |
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Type::Uint8Clamped |
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Type::Int8 |
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Type::Uint16 |
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Type::Int16 |
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Type::Uint32 |
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Type::Int32
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)
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}
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