From 36d22d82aa202bb199967e9512281e9a53db42c9 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 21:33:14 +0200 Subject: Adding upstream version 115.7.0esr. Signed-off-by: Daniel Baumann --- third_party/rust/getrandom/src/espidf.rs | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) create mode 100644 third_party/rust/getrandom/src/espidf.rs (limited to 'third_party/rust/getrandom/src/espidf.rs') diff --git a/third_party/rust/getrandom/src/espidf.rs b/third_party/rust/getrandom/src/espidf.rs new file mode 100644 index 0000000000..d074dc4cec --- /dev/null +++ b/third_party/rust/getrandom/src/espidf.rs @@ -0,0 +1,26 @@ +// Copyright 2021 Developers of the Rand project. +// +// Licensed under the Apache License, Version 2.0 or the MIT license +// , 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, mem::MaybeUninit}; + +extern "C" { + fn esp_fill_random(buf: *mut c_void, len: usize) -> u32; +} + +pub fn getrandom_inner(dest: &mut [MaybeUninit]) -> 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(()) +} -- cgit v1.2.3