Adding upstream version 86.0.1.upstream/86.0.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 56 insertions, 0 deletions

diff --git a/third_party/rust/digest/src/dyn_digest.rs b/third_party/rust/digest/src/dyn_digest.rs
new file mode 100644
index 0000000000..789cdc86ef
--- /dev/null
+++ b/third_party/rust/digest/src/dyn_digest.rs
@@ -0,0 +1,56 @@
+#![cfg(feature = "std")]
+use std::boxed::Box;
+
+use super::{Input, FixedOutput, Reset};
+use generic_array::typenum::Unsigned;
+
+/// The `DynDigest` trait is a modification of `Digest` trait suitable
+/// for trait objects.
+pub trait DynDigest {
+    /// Digest input data.
+    ///
+    /// This method can be called repeatedly for use with streaming messages.
+    fn input(&mut self, data: &[u8]);
+
+    /// Retrieve result and reset hasher instance
+    fn result_reset(&mut self) -> Box<[u8]>;
+
+    /// Retrieve result and consume boxed hasher instance
+    fn result(self: Box<Self>) -> Box<[u8]>;
+
+    /// Reset hasher instance to its initial state.
+    fn reset(&mut self);
+
+    /// Get output size of the hasher
+    fn output_size(&self) -> usize;
+}
+
+impl<D: Input + FixedOutput + Reset + Clone> DynDigest for D {
+    /// Digest input data.
+    ///
+    /// This method can be called repeatedly for use with streaming messages.
+    fn input(&mut self, data: &[u8]) {
+        Input::input(self, data);
+    }
+
+    /// Retrieve result and reset hasher instance
+    fn result_reset(&mut self) -> Box<[u8]> {
+        let res = self.clone().fixed_result().to_vec().into_boxed_slice();
+        Reset::reset(self);
+        res
+    }
+
+    /// Retrieve result and consume boxed hasher instance
+    fn result(self: Box<Self>) -> Box<[u8]> {
+        self.fixed_result().to_vec().into_boxed_slice()
+    }
+
+    fn reset(&mut self) {
+        Reset::reset(self);
+    }
+
+    /// Get output size of the hasher
+    fn output_size(&self) -> usize {
+        <Self as FixedOutput>::OutputSize::to_usize()
+    }
+}