From 698f8c2f01ea549d77d7dc3338a12e04c11057b9 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Wed, 17 Apr 2024 14:02:58 +0200
Subject: Adding upstream version 1.64.0+dfsg1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 vendor/rand-0.7.3/src/rngs/entropy.rs | 76 +++++++++++++++++++++++++++++++++++
 1 file changed, 76 insertions(+)
 create mode 100644 vendor/rand-0.7.3/src/rngs/entropy.rs

(limited to 'vendor/rand-0.7.3/src/rngs/entropy.rs')

diff --git a/vendor/rand-0.7.3/src/rngs/entropy.rs b/vendor/rand-0.7.3/src/rngs/entropy.rs
new file mode 100644
index 000000000..9ad0d71e0
--- /dev/null
+++ b/vendor/rand-0.7.3/src/rngs/entropy.rs
@@ -0,0 +1,76 @@
+// 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.
+
+//! Entropy generator, or wrapper around external generators
+
+#![allow(deprecated)] // whole module is deprecated
+
+use crate::rngs::OsRng;
+use rand_core::{CryptoRng, Error, RngCore};
+
+/// An interface returning random data from external source(s), provided
+/// specifically for securely seeding algorithmic generators (PRNGs).
+///
+/// This is deprecated. It is suggested you use [`rngs::OsRng`] instead.
+///
+/// [`rngs::OsRng`]: crate::rngs::OsRng
+#[derive(Debug)]
+#[deprecated(since = "0.7.0", note = "use rngs::OsRng instead")]
+pub struct EntropyRng {
+    source: OsRng,
+}
+
+impl EntropyRng {
+    /// Create a new `EntropyRng`.
+    ///
+    /// This method will do no system calls or other initialization routines,
+    /// those are done on first use. This is done to make `new` infallible,
+    /// and `try_fill_bytes` the only place to report errors.
+    pub fn new() -> Self {
+        EntropyRng { source: OsRng }
+    }
+}
+
+impl Default for EntropyRng {
+    fn default() -> Self {
+        EntropyRng::new()
+    }
+}
+
+impl RngCore for EntropyRng {
+    fn next_u32(&mut self) -> u32 {
+        self.source.next_u32()
+    }
+
+    fn next_u64(&mut self) -> u64 {
+        self.source.next_u64()
+    }
+
+    fn fill_bytes(&mut self, dest: &mut [u8]) {
+        self.source.fill_bytes(dest)
+    }
+
+    fn try_fill_bytes(&mut self, dest: &mut [u8]) -> Result<(), Error> {
+        self.source.try_fill_bytes(dest)
+    }
+}
+
+impl CryptoRng for EntropyRng {}
+
+
+#[cfg(test)]
+mod test {
+    use super::*;
+
+    #[test]
+    fn test_entropy() {
+        let mut rng = EntropyRng::new();
+        let n = (rng.next_u32() ^ rng.next_u32()).count_ones();
+        assert!(n >= 2); // p(failure) approx 1e-7
+    }
+}
-- 
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