Commit Rust POC

This replaces the Python script.  Since all MIT-licensed code is
removed, the LICENSE file is as well.

'cargo run' to run the program.

Signed-off-by: Malfurious <m@lfurio.us>

1 files changed, 23 insertions, 0 deletions

diff --git a/src/demo_hash.rs b/src/demo_hash.rs
new file mode 100644
index 0000000..115a10f
--- /dev/null
+++ b/src/demo_hash.rs
@@ -0,0 +1,23 @@
+use sha2::Digest;
+
+pub fn hash_bigint(n: usize, i: &num::BigInt) -> Vec<u8>
+{
+    let (_, bytes) = i.to_bytes_be();
+    assert!(bytes.len() <= n);
+
+    let mut hash = sha2::Sha512::new();
+    hash.input(vec![0; n - bytes.len()]);
+    hash.input(bytes);
+
+    hash.result().to_vec()
+}
+
+pub fn show_hash(h: &Vec<u8>)
+{
+    for x in h
+    {
+        print!("{:02x}", x);
+    }
+
+    println!();
+}