56fec2ca63
This fixes an invalid length being reported from `float32_array_to_slice` (which used the byte length), and also to generalize getting data from a JS array buffer view, to reduce code duplication. The pending type safety issues, like where we could send a `UInt16Array` where we expect a `Float32` one, should be solved by IDL bindings in some cases, like `uniform[n]fv` or `vertexAttrib[n]fv`, and with extra checks in others, like in the pending `texImage2D(..., ArrayBufferView)`. r? @jdm Source-Repo: https://github.com/servo/servo Source-Revision: 4ab1cdece6f594512a0ae9605ff5ebee630a70ca
81 lines
2.4 KiB
Rust
81 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 http://mozilla.org/MPL/2.0/. */
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use dom::bindings::cell::DOMRefCell;
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use dom::bindings::codegen::Bindings::CryptoBinding;
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use dom::bindings::codegen::Bindings::CryptoBinding::CryptoMethods;
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use dom::bindings::conversions::array_buffer_view_data;
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use dom::bindings::error::{Error, Fallible};
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use dom::bindings::global::GlobalRef;
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use dom::bindings::js::Root;
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use dom::bindings::reflector::{Reflector, reflect_dom_object};
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use js::jsapi::{JSContext, JSObject};
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use js::jsapi::{JS_GetArrayBufferViewType, Type};
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use rand::{OsRng, Rng};
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no_jsmanaged_fields!(OsRng);
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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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rng: DOMRefCell<OsRng>,
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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(OsRng::new().unwrap()),
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}
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}
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pub fn new(global: GlobalRef) -> Root<Crypto> {
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reflect_dom_object(box Crypto::new_inherited(), global, CryptoBinding::Wrap)
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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(&self,
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_cx: *mut JSContext,
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input: *mut JSObject)
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-> Fallible<*mut JSObject> {
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let mut data = match unsafe { array_buffer_view_data::<u8>(input) } {
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Some(data) => data,
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None => {
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return Err(Error::Type("Argument to Crypto.getRandomValues is not an ArrayBufferView"
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.to_owned()));
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}
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};
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if !is_integer_buffer(input) {
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return Err(Error::TypeMismatch);
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}
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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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Ok(input)
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}
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}
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#[allow(unsafe_code)]
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fn is_integer_buffer(input: *mut JSObject) -> bool {
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match unsafe { JS_GetArrayBufferViewType(input) } {
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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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