Very simple implementation of sha3_256 (doesn't work for very long inputs)

src/lib.rs

@@ -0,0 +1,37 @@
+pub mod sha3;
+
+#[cfg(test)]
+mod tests {
+    // use super::*;
+
+    use crate::sha3::Sha3_256;
+
+    #[test]
+    fn it_works() {
+        let mut sha = Sha3_256::default();
+
+        let text = "";
+
+        let arr = text.as_bytes();
+
+        let mut data = [0_u8; 136];
+        data.clone_from_slice(arr);
+
+        // sha.absorb([0, 1, 2, 3, 4, 5, 6, 7]);
+        sha.absorb(&data);
+        let res = sha.squeeze();
+        // a7ffc6f8bf1ed76651c14756a061d662f580ff4de43b49fa82d80a4b80f8434a
+        let expected_res: [u8; 32] = [
+            0xa7, 0xff, 0xc6, 0xf8, 0xbf, 0x1e, 0xd7, 0x66, 0x51, 0xc1, 0x47, 0x56, 0xa0, 0x61,
+            0xd6, 0x62, 0xf5, 0x80, 0xff, 0x4d, 0xe4, 0x3b, 0x49, 0xfa, 0x82, 0xd8, 0x0a, 0x4b,
+            0x80, 0xf8, 0x43, 0x4a,
+        ];
+
+        for i in 0..32 {
+            print!("{:#001x}", res[i]);
+        }
+        println!();
+
+        assert!(res == expected_res);
+    }
+}