From 84688c4062a471a8d200727f7444311cf3c1fe8d Mon Sep 17 00:00:00 2001
From: David Senk <david@ything.net>
Date: Mon, 18 Aug 2025 22:35:56 -0400
Subject: [PATCH] working sha3_256

---
 src/hashes/sha3_256.rs | 28 +++++++++++++++++++++++-----
 1 file changed, 23 insertions(+), 5 deletions(-)

diff --git a/src/hashes/sha3_256.rs b/src/hashes/sha3_256.rs
index 736b1d9..d82b0bc 100644
--- a/src/hashes/sha3_256.rs
+++ b/src/hashes/sha3_256.rs
@@ -1,20 +1,27 @@
 use super::*;
+use ::sha3::{Digest, Sha3_256};
 
 pub struct SHA3_256 {
     hash: BITS256,
+    hasher: Sha3_256,
 }
 
 impl Hasher for SHA3_256 {
     fn new() -> Self {
-        SHA3_256 { hash: [0; 32] }
+        SHA3_256 {
+            hash: [0; 32],
+            hasher: Sha3_256::new(),
+        }
     }
 
     fn digest(&mut self, bytes: impl AsRef<[u8]>) {
-        todo!()
+        self.hasher.update(bytes)
     }
 
-    fn complete(self) -> HashReturn {
-        todo!()
+    fn complete(mut self) -> HashReturn {
+        let res = self.hasher.finalize();
+        self.hash.copy_from_slice(&res);
+        HashReturn::SHA3_256(self.hash)
     }
 }
 
@@ -24,6 +31,17 @@ mod test {
 
     #[test]
     fn test_sha3_256_hash() {
-        todo!();
+        let input = "HelloWorld";
+        let expected_output = "964b398ecd55793d8ca93e01274efe1377a70c8dc358fdca17cb4e94a9ed7777";
+
+        let mut sha3_256 = SHA3_256::new();
+
+        sha3_256.digest(input);
+
+        let result = sha3_256.complete().into_bytes();
+
+        let hash_out = crate::hex_table::u8_array_to_lower_hex_string(&result).unwrap();
+
+        assert_eq!(hash_out, expected_output);
     }
 }