chore: checkpoint before Python removal

vendor/polyval/tests/lib.rs

@@ -0,0 +1,26 @@
+use hex_literal::hex;
+use polyval::{
+    universal_hash::{KeyInit, UniversalHash},
+    Polyval, BLOCK_SIZE,
+};
+
+//
+// Test vectors for POLYVAL from RFC 8452 Appendix A
+// <https://tools.ietf.org/html/rfc8452#appendix-A>
+//
+
+const H: [u8; BLOCK_SIZE] = hex!("25629347589242761d31f826ba4b757b");
+const X_1: [u8; BLOCK_SIZE] = hex!("4f4f95668c83dfb6401762bb2d01a262");
+const X_2: [u8; BLOCK_SIZE] = hex!("d1a24ddd2721d006bbe45f20d3c9f362");
+
+/// POLYVAL(H, X_1, X_2)
+const POLYVAL_RESULT: [u8; BLOCK_SIZE] = hex!("f7a3b47b846119fae5b7866cf5e5b77e");
+
+#[test]
+fn polyval_test_vector() {
+    let mut poly = Polyval::new(&H.into());
+    poly.update(&[X_1.into(), X_2.into()]);
+
+    let result = poly.finalize();
+    assert_eq!(&POLYVAL_RESULT[..], result.as_slice());
+}