diff options
Diffstat (limited to 'rand/rand_os/src/wasm32_stdweb.rs')
-rw-r--r-- | rand/rand_os/src/wasm32_stdweb.rs | 107 |
1 files changed, 0 insertions, 107 deletions
diff --git a/rand/rand_os/src/wasm32_stdweb.rs b/rand/rand_os/src/wasm32_stdweb.rs deleted file mode 100644 index 3be0ce6..0000000 --- a/rand/rand_os/src/wasm32_stdweb.rs +++ /dev/null @@ -1,107 +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 stdweb - -use std::mem; -use stdweb::unstable::TryInto; -use stdweb::web::error::Error as WebError; -use rand_core::{Error, ErrorKind}; -use super::OsRngImpl; - -#[derive(Clone, Debug)] -enum OsRngMethod { - Browser, - Node -} - -#[derive(Clone, Debug)] -pub struct OsRng(OsRngMethod); - -impl OsRngImpl for OsRng { - fn new() -> Result<OsRng, Error> { - let result = js! { - try { - if ( - typeof self === "object" && - typeof self.crypto === "object" && - typeof self.crypto.getRandomValues === "function" - ) { - return { success: true, ty: 1 }; - } - - if (typeof require("crypto").randomBytes === "function") { - return { success: true, ty: 2 }; - } - - return { success: false, error: new Error("not supported") }; - } catch(err) { - return { success: false, error: err }; - } - }; - - if js!{ return @{ result.as_ref() }.success } == true { - let ty = js!{ return @{ result }.ty }; - - if ty == 1 { Ok(OsRng(OsRngMethod::Browser)) } - else if ty == 2 { Ok(OsRng(OsRngMethod::Node)) } - else { unreachable!() } - } else { - let err: WebError = js!{ return @{ result }.error }.try_into().unwrap(); - Err(Error::with_cause(ErrorKind::Unavailable, "WASM Error", err)) - } - } - - - fn fill_chunk(&mut self, dest: &mut [u8]) -> Result<(), Error> { - assert_eq!(mem::size_of::<usize>(), 4); - - let len = dest.len() as u32; - let ptr = dest.as_mut_ptr() as i32; - - let result = match self.0 { - OsRngMethod::Browser => js! { - try { - let array = new Uint8Array(@{ len }); - self.crypto.getRandomValues(array); - HEAPU8.set(array, @{ ptr }); - - return { success: true }; - } catch(err) { - return { success: false, error: err }; - } - }, - OsRngMethod::Node => js! { - try { - let bytes = require("crypto").randomBytes(@{ len }); - HEAPU8.set(new Uint8Array(bytes), @{ ptr }); - - return { success: true }; - } catch(err) { - return { success: false, error: err }; - } - } - }; - - if js!{ return @{ result.as_ref() }.success } == true { - Ok(()) - } else { - let err: WebError = js!{ return @{ result }.error }.try_into().unwrap(); - Err(Error::with_cause(ErrorKind::Unexpected, "WASM Error", err)) - } - } - - fn max_chunk_size(&self) -> usize { 65536 } - - fn method_str(&self) -> &'static str { - match self.0 { - OsRngMethod::Browser => "Crypto.getRandomValues", - OsRngMethod::Node => "crypto.randomBytes", - } - } -} |