cleanup imports round 2

src/constants.rs

@@ -1,8 +1,7 @@
 use std::fmt::Display;
 
 use iso7816_tlv::simple::Tlv;
-use sha1::{Digest, Sha1};
-use sha2::{Sha256, Sha512};
+use sha1::Digest;
 use strum::IntoEnumIterator; // 0.17.1
 use strum_macros::EnumIter; // 0.17.1
 pub const INS_SELECT: u8 = 0xa4;
@@ -114,18 +113,18 @@ impl HashAlgo {
     // returns a function capable of hashing a byte array
     pub fn get_hash_fun(&self) -> impl Fn(&[u8]) -> Vec<u8> {
         match self {
-            HashAlgo::Sha1 => |m: &[u8]| {
-                let mut hasher = Sha1::new();
+            Self::Sha1 => |m: &[u8]| {
+                let mut hasher = sha1::Sha1::new();
                 hasher.update(m);
                 hasher.finalize().to_vec()
             },
-            HashAlgo::Sha256 => |m: &[u8]| {
-                let mut hasher = Sha256::new();
+            Self::Sha256 => |m: &[u8]| {
+                let mut hasher = sha2::Sha256::new();
                 hasher.update(m);
                 hasher.finalize().to_vec()
             },
-            HashAlgo::Sha512 => |m: &[u8]| {
-                let mut hasher = Sha512::new();
+            Self::Sha512 => |m: &[u8]| {
+                let mut hasher = sha2::Sha512::new();
                 hasher.update(m);
                 hasher.finalize().to_vec()
             },
@@ -135,9 +134,9 @@ impl HashAlgo {
     // returns digest output size in number of bytes
     pub fn digest_size(&self) -> usize {
         match self {
-            HashAlgo::Sha1 => 20,
-            HashAlgo::Sha256 => 32,
-            HashAlgo::Sha512 => 64,
+            Self::Sha1 => 20,
+            Self::Sha256 => 32,
+            Self::Sha512 => 64,
         }
     }
 }

src/example.rs

@@ -1,10 +1,6 @@
 // SPDX-License-Identifier: BSD-3-Clause
 
-use core::time;
 use lib_ykoath2::OathSession;
-use pcsc;
-use std::process;
-use std::thread;
 // use crate::args::Cli;
 
 // use clap::Parser;
@@ -27,7 +23,7 @@ fn main() {
     // Show message if no YubiKey(s)
     if yubikeys.len() == 0 {
         println!("No yubikeys detected");
-        process::exit(0);
+        std::process::exit(0);
     }
 
     // Print device info for all the YubiKeys we detected
@@ -53,7 +49,7 @@ fn main() {
             println!("No credentials on device {}", device_label);
         }
 
-        thread::sleep(time::Duration::from_secs(5)); // show refresh is working
+        std::thread::sleep(std::time::Duration::from_secs(5)); // show refresh is working
 
         // Enumerate the OATH codes
         for oath in codes {

src/lib.rs

@@ -7,15 +7,7 @@ mod oath_credentialid;
 use oath_credential::*;
 use oath_credentialid::*;
 /// Utilities for interacting with YubiKey OATH/TOTP functionality
-extern crate pcsc;
-use pbkdf2::pbkdf2_hmac_array;
-use sha1::Sha1;
-
-use std::{
-    fmt::Display,
-    str::{self},
-    time::Duration,
-};
+use std::{fmt::Display, time::Duration};
 
 use base64::{engine::general_purpose, Engine as _};
 use hmac::{Hmac, Mac};
@@ -32,13 +24,13 @@ fn _get_device_id(salt: Vec<u8>) -> String {
     return general_purpose::URL_SAFE_NO_PAD.encode(hash_16_bytes);
 }
 fn _hmac_sha1(key: &[u8], message: &[u8]) -> Vec<u8> {
-    let mut mac = Hmac::<Sha1>::new_from_slice(key).expect("Invalid key length");
+    let mut mac = Hmac::<sha1::Sha1>::new_from_slice(key).expect("Invalid key length");
     mac.update(message);
     mac.finalize().into_bytes().to_vec()
 }
 
 fn _derive_key(salt: &[u8], passphrase: &str) -> Vec<u8> {
-    pbkdf2_hmac_array::<Sha1, 16>(passphrase.as_bytes(), salt, 1000).to_vec()
+    pbkdf2::pbkdf2_hmac_array::<sha1::Sha1, 16>(passphrase.as_bytes(), salt, 1000).to_vec()
 }
 
 fn _hmac_shorten_key(key: &[u8], algo: HashAlgo) -> Vec<u8> {