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https://github.com/servo/servo.git
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c693ef7025
I changed the isaac random to always be the 32 bits one because the 64 bits version doesn't work with ReseedingRng as it requires the generator's output to be u32 for some reasons. The other main change is that the reseed method doesn't exist anymore and now rand recreates a new generator when it needs to reseed so I had to add a new method for when we don't want a generator to be reseeded. Closes #23558
83 lines
2.5 KiB
Rust
83 lines
2.5 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 crate::dom::bindings::cell::DomRefCell;
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use crate::dom::bindings::codegen::Bindings::CryptoBinding;
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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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use dom_struct::dom_struct;
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use js::jsapi::JSObject;
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use js::jsapi::Type;
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use js::rust::CustomAutoRooterGuard;
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use js::typedarray::ArrayBufferView;
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use servo_rand::{RngCore, ServoRng};
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use std::ptr::NonNull;
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unsafe_no_jsmanaged_fields!(ServoRng);
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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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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::new()),
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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(
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Box::new(Crypto::new_inherited()),
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global,
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CryptoBinding::Wrap,
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)
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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<NonNull<JSObject>> {
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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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return Err(Error::TypeMismatch);
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} else {
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let mut 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(&mut data);
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}
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unsafe { Ok(NonNull::new_unchecked(*input.underlying_object())) }
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}
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}
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fn is_integer_buffer(array_type: Type) -> bool {
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match 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 => true,
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_ => false,
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}
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}
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