refactor: apply rust suggested code cleanups

src/tasks/tasks01/block2poly.rs

@@ -1,4 +1,4 @@
-use crate::utils::poly::{b64_2_num, block_2_polynomial, get_coefficients};
+use crate::utils::poly::block_2_polynomial;
 use anyhow::Result;
 use base64::prelude::*;
 use serde_json::Value;

src/tasks/tasks01/gfmul.rs

@@ -1,7 +1,4 @@
-use crate::utils::{
-    field::ByteArray,
-    poly::{b64_2_num, coefficient_to_binary, gfmul},
-};
+use crate::utils::poly::gfmul;
 
 use anyhow::Result;
 use base64::prelude::*;

src/tasks/tasks01/pad_oracle.rs

@@ -3,8 +3,8 @@ use base64::prelude::*;
 use serde_json::Value;
 use std::io::prelude::*;
 use std::net::TcpStream;
-use std::time::{Duration, Instant};
-use std::{thread, usize};
+use std::time::Instant;
+use std::usize;
 
 pub fn padding_oracle(args: &Value) -> Result<Vec<u8>> {
     let hostname: String = serde_json::from_value(args["hostname"].clone())?;
@@ -29,8 +29,6 @@ pub fn padding_oracle(args: &Value) -> Result<Vec<u8>> {
     let mut chunk_counter = 0;
 
     for chunk in &cipher_chunks {
-        let start = Instant::now();
-
         let mut stream = TcpStream::connect(format!("{}:{}", hostname, port))?;
         stream.set_nonblocking(false)?;
 
@@ -111,12 +109,12 @@ pub fn padding_oracle(args: &Value) -> Result<Vec<u8>> {
                 } else {
                     //eprintln!("Invalid padding");
                     // Search for second hit
-                    let valid_val = (255
+                    let valid_val = 255
                         - server_q_resp
                             .iter()
                             .rev()
                             .position(|&r| r == 0x01)
-                            .unwrap_or(0x00) as u8);
+                            .unwrap_or(0x00) as u8;
                     if valid_val == 0x00 {
                         eprintln!("No valid found");
                     }

src/tasks/tasks01/poly2block.rs

@@ -1,6 +1,5 @@
-use crate::utils::poly::{self, polynomial_2_block};
+use crate::utils::poly::{polynomial_2_block};
 use anyhow::{Ok, Result};
-use base64::prelude::*;
 use serde_json::Value;
 
 pub fn poly2block(args: &Value) -> Result<Vec<u8>> {

src/tasks/tasks01/sea128.rs

@@ -12,7 +12,6 @@ pub fn sea128(args: &Value) -> Result<String> {
     let input_string: String = serde_json::from_value(args["input"].clone())?;
     //let plaintexts: &[u8] = &b64_2_num(plaintexts_string)?.to_ne_bytes();
     let input = BASE64_STANDARD.decode(input_string)?;
-    let xor_val: u128 = 0xc0ffeec0ffeec0ffeec0ffeec0ffee11;
 
     let mode: String = serde_json::from_value(args["mode"].clone())?;
     match mode.as_str() {
@@ -34,7 +33,6 @@ pub fn sea128(args: &Value) -> Result<String> {
 
 #[cfg(test)]
 mod tests {
-    use std::fs;
 
     use anyhow::Result;
     use serde_json::json;