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authorDaniel Mueller <deso@posteo.net>2019-01-16 17:26:30 -0800
committerDaniel Mueller <deso@posteo.net>2019-01-16 17:26:30 -0800
commit8350ac6afb2d678b74581000a6aafe1994b72231 (patch)
tree2330da01a806921b3849c9e64d2b9f506495e2c0 /rand/rand_os/src/wasm32_stdweb.rs
parentd6652b913b33e432a748187f9f5623cec1e9926e (diff)
downloadnitrocli-8350ac6afb2d678b74581000a6aafe1994b72231.tar.gz
nitrocli-8350ac6afb2d678b74581000a6aafe1994b72231.tar.bz2
Update nitrokey crate to 0.3.3
This change updates the nitrokey crate to version 0.3.3. Along with that change we update rand to 0.6.4 because rand 0.6.1 does not yet contain a publicly accessible rand_os. Note that we no longer require all crates in rand's workspace, but only rand_os and rand_core, which is a significant reduction in the number of lines of code compiled. Import subrepo nitrokey/:nitrokey at 7cf747d56ddc0b7eeedc3caf36dcc909907a171c Import subrepo rand/:rand at 4336232dda03323634b10ec72ddf27914aebc3a2
Diffstat (limited to 'rand/rand_os/src/wasm32_stdweb.rs')
-rw-r--r--rand/rand_os/src/wasm32_stdweb.rs107
1 files changed, 107 insertions, 0 deletions
diff --git a/rand/rand_os/src/wasm32_stdweb.rs b/rand/rand_os/src/wasm32_stdweb.rs
new file mode 100644
index 0000000..3be0ce6
--- /dev/null
+++ b/rand/rand_os/src/wasm32_stdweb.rs
@@ -0,0 +1,107 @@
+// 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",
+ }
+ }
+}