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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:19:03 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:19:03 +0000 |
commit | 64d98f8ee037282c35007b64c2649055c56af1db (patch) | |
tree | 5492bcf97fce41ee1c0b1cc2add283f3e66cdab0 /vendor/getrandom-0.1.16/src/wasm32_bindgen.rs | |
parent | Adding debian version 1.67.1+dfsg1-1. (diff) | |
download | rustc-64d98f8ee037282c35007b64c2649055c56af1db.tar.xz rustc-64d98f8ee037282c35007b64c2649055c56af1db.zip |
Merging upstream version 1.68.2+dfsg1.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'vendor/getrandom-0.1.16/src/wasm32_bindgen.rs')
-rw-r--r-- | vendor/getrandom-0.1.16/src/wasm32_bindgen.rs | 128 |
1 files changed, 0 insertions, 128 deletions
diff --git a/vendor/getrandom-0.1.16/src/wasm32_bindgen.rs b/vendor/getrandom-0.1.16/src/wasm32_bindgen.rs deleted file mode 100644 index 77088ffa4..000000000 --- a/vendor/getrandom-0.1.16/src/wasm32_bindgen.rs +++ /dev/null @@ -1,128 +0,0 @@ -// Copyright 2018 Developers of the Rand project. -// -// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or -// https://www.apache.org/licenses/LICENSE-2.0> or the MIT license -// <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your -// option. This file may not be copied, modified, or distributed -// except according to those terms. - -//! Implementation for WASM via wasm-bindgen -extern crate std; - -use core::cell::RefCell; -use core::mem; -use std::thread_local; - -use js_sys::Uint8Array; -// We have to rename wasm_bindgen to bindgen in the Cargo.toml for backwards -// compatibility. We have to rename it back here or else the macros will break. -extern crate bindgen as wasm_bindgen; -use wasm_bindgen::prelude::*; - -use crate::error::{BINDGEN_CRYPTO_UNDEF, BINDGEN_GRV_UNDEF}; -use crate::Error; - -const CHUNK_SIZE: usize = 256; - -#[derive(Clone, Debug)] -enum RngSource { - Node(NodeCrypto), - Browser(BrowserCrypto, Uint8Array), -} - -// JsValues are always per-thread, so we initialize RngSource for each thread. -// See: https://github.com/rustwasm/wasm-bindgen/pull/955 -thread_local!( - static RNG_SOURCE: RefCell<Option<RngSource>> = RefCell::new(None); -); - -pub fn getrandom_inner(dest: &mut [u8]) -> Result<(), Error> { - assert_eq!(mem::size_of::<usize>(), 4); - - RNG_SOURCE.with(|f| { - let mut source = f.borrow_mut(); - if source.is_none() { - *source = Some(getrandom_init()?); - } - - match source.as_ref().unwrap() { - RngSource::Node(n) => n.random_fill_sync(dest), - RngSource::Browser(crypto, buf) => { - // getRandomValues does not work with all types of WASM memory, - // so we initially write to browser memory to avoid exceptions. - for chunk in dest.chunks_mut(CHUNK_SIZE) { - // The chunk can be smaller than buf's length, so we call to - // JS to create a smaller view of buf without allocation. - let sub_buf = buf.subarray(0, chunk.len() as u32); - - crypto.get_random_values(&sub_buf); - sub_buf.copy_to(chunk); - } - } - }; - Ok(()) - }) -} - -fn getrandom_init() -> Result<RngSource, Error> { - if let Ok(self_) = Global::get_self() { - // If `self` is defined then we're in a browser somehow (main window - // or web worker). We get `self.crypto` (called `msCrypto` on IE), so we - // can call `crypto.getRandomValues`. If `crypto` isn't defined, we - // assume we're in an older web browser and the OS RNG isn't available. - - let crypto: BrowserCrypto = match (self_.crypto(), self_.ms_crypto()) { - (crypto, _) if !crypto.is_undefined() => crypto.into(), - (_, crypto) if !crypto.is_undefined() => crypto.into(), - _ => return Err(BINDGEN_CRYPTO_UNDEF), - }; - - // Test if `crypto.getRandomValues` is undefined as well - if crypto.get_random_values_fn().is_undefined() { - return Err(BINDGEN_GRV_UNDEF); - } - - let buf = Uint8Array::new_with_length(CHUNK_SIZE as u32); - return Ok(RngSource::Browser(crypto, buf)); - } - - return Ok(RngSource::Node(MODULE.require("crypto"))); -} - -#[wasm_bindgen] -extern "C" { - type Global; - #[wasm_bindgen(getter, catch, static_method_of = Global, js_class = self, js_name = self)] - fn get_self() -> Result<Self_, JsValue>; - - type Self_; - #[wasm_bindgen(method, getter, js_name = "msCrypto", structural)] - fn ms_crypto(me: &Self_) -> JsValue; - #[wasm_bindgen(method, getter, structural)] - fn crypto(me: &Self_) -> JsValue; - - #[derive(Clone, Debug)] - type BrowserCrypto; - - // TODO: these `structural` annotations here ideally wouldn't be here to - // avoid a JS shim, but for now with feature detection they're - // unavoidable. - #[wasm_bindgen(method, js_name = getRandomValues, structural, getter)] - fn get_random_values_fn(me: &BrowserCrypto) -> JsValue; - #[wasm_bindgen(method, js_name = getRandomValues, structural)] - fn get_random_values(me: &BrowserCrypto, buf: &Uint8Array); - - #[derive(Clone, Debug)] - type NodeCrypto; - - #[wasm_bindgen(method, js_name = randomFillSync, structural)] - fn random_fill_sync(me: &NodeCrypto, buf: &mut [u8]); - - type NodeModule; - - #[wasm_bindgen(js_name = module)] - static MODULE: NodeModule; - - #[wasm_bindgen(method)] - fn require(this: &NodeModule, s: &str) -> NodeCrypto; -} |