fix: add fix for powmod spcial case k=0

src/utils/field.rs

@@ -85,13 +85,12 @@ impl Polynomial {
         }
 
         if exponent == 0 {
-            let inter = Polynomial::new(vec![FieldElement::new(
+            let result = Polynomial::new(vec![FieldElement::new(
                 polynomial_2_block(vec![0], "gcm").unwrap(),
             )]);
-            let result = inter.div(&modulus);
 
             eprintln!("Returned value is: {:02X?}", result);
-            return result.1;
+            return result;
         }
 
         //eprintln!("Initial result: {:?}", result);
@@ -1175,6 +1174,20 @@ mod tests {
         );
     }
 
+    #[test]
+    fn test_field_poly_powmod_k0_special() {
+        let json1 = json!(["NeverGonnaGiveYouUpAAA=="]);
+        let json2 = json!(["NeverGonnaGiveYouUpAAA=="]);
+        let element1: Polynomial = Polynomial::from_c_array(&json1);
+        let modulus: Polynomial = Polynomial::from_c_array(&json2);
+
+        let result = element1.pow_mod(0, modulus);
+
+        eprintln!("Result is: {:02X?}", result);
+
+        assert_eq!(result.to_c_array(), vec!["gAAAAAAAAAAAAAAAAAAAAA=="]);
+    }
+
     #[test]
     fn test_field_poly_powmod_kn_eqdeg() {
         let json1 = json!([