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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 09:22:09 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 09:22:09 +0000
commit43a97878ce14b72f0981164f87f2e35e14151312 (patch)
tree620249daf56c0258faa40cbdcf9cfba06de2a846 /third_party/rust/getrandom/src/espidf.rs
parentInitial commit. (diff)
downloadfirefox-upstream.tar.xz
firefox-upstream.zip
Adding upstream version 110.0.1.upstream/110.0.1upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'third_party/rust/getrandom/src/espidf.rs')
-rw-r--r--third_party/rust/getrandom/src/espidf.rs26
1 files changed, 26 insertions, 0 deletions
diff --git a/third_party/rust/getrandom/src/espidf.rs b/third_party/rust/getrandom/src/espidf.rs
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+++ b/third_party/rust/getrandom/src/espidf.rs
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+// Copyright 2021 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 ESP-IDF
+use crate::Error;
+use core::ffi::c_void;
+
+extern "C" {
+ fn esp_fill_random(buf: *mut c_void, len: usize) -> u32;
+}
+
+pub fn getrandom_inner(dest: &mut [u8]) -> Result<(), Error> {
+ // Not that NOT enabling WiFi, BT, or the voltage noise entropy source (via `bootloader_random_enable`)
+ // will cause ESP-IDF to return pseudo-random numbers based on the voltage noise entropy, after the initial boot process:
+ // https://docs.espressif.com/projects/esp-idf/en/latest/esp32/api-reference/system/random.html
+ //
+ // However tracking if some of these entropy sources is enabled is way too difficult to implement here
+ unsafe { esp_fill_random(dest.as_mut_ptr().cast(), dest.len()) };
+
+ Ok(())
+}