Fix more Clippy warnings.

examples/console_test.rs

@@ -23,8 +23,8 @@ fn main() {
     let mut buf = [0; BUFFER_SIZE];
     loop {
         for i in 1..buf.len() {
-            for j in 0..i {
-                buf[j] = b'0' + ((i % 10) as u8);
+            for byte in buf.iter_mut().take(i) {
+                *byte = b'0' + ((i % 10) as u8);
             }
             buf[i] = b'\n';
             Console::write_unbuffered(&mut buf[..(i + 1)]);

examples/crypto_bench.rs

@@ -151,7 +151,7 @@ fn main() {
 
 fn bench<F>(console: &mut Console, timer: &Timer, title: &str, mut f: F)
 where
-    F: FnMut() -> (),
+    F: FnMut(),
 {
     writeln!(console, "****************************************").unwrap();
     writeln!(console, "Benchmarking: {}", title).unwrap();

src/ctap/data_formats.rs

@@ -1252,7 +1252,7 @@ mod test {
         let mut rng = ThreadRng256 {};
         let sk = crypto::ecdh::SecKey::gensk(&mut rng);
         let pk = sk.genpk();
-        let cose_key = CoseKey::from(pk.clone());
+        let cose_key = CoseKey::from(pk);
         let cbor_extensions = cbor_map! {
             "hmac-secret" => cbor_map! {
                 1 => cbor::Value::Map(cose_key.0.clone()),

src/ctap/hid/mod.rs

@@ -137,6 +137,7 @@ impl CtapHid {
     const TIMEOUT_DURATION: Duration<isize> = Duration::from_ms(100);
     const WINK_TIMEOUT_DURATION: Duration<isize> = Duration::from_ms(5000);
 
+    #[allow(clippy::new_without_default)]
     pub fn new() -> CtapHid {
         CtapHid {
             assembler: MessageAssembler::new(),

src/ctap/hid/receive.rs

@@ -49,6 +49,12 @@ pub enum Error {
     Timeout,
 }
 
+impl Default for MessageAssembler {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
 impl MessageAssembler {
     pub fn new() -> MessageAssembler {
         MessageAssembler {

src/ctap/pin_protocol_v1.rs

@@ -777,7 +777,7 @@ mod test {
     #[test]
     fn test_process_get_pin_retries() {
         let mut rng = ThreadRng256 {};
-        let mut persistent_store = PersistentStore::new(&mut rng);
+        let persistent_store = PersistentStore::new(&mut rng);
         let pin_protocol_v1 = PinProtocolV1::new(&mut rng);
         let expected_response = Ok(AuthenticatorClientPinResponse {
             key_agreement: None,
@@ -785,7 +785,7 @@ mod test {
             retries: Some(persistent_store.pin_retries().unwrap() as u64),
         });
         assert_eq!(
-            pin_protocol_v1.process_get_pin_retries(&mut persistent_store),
+            pin_protocol_v1.process_get_pin_retries(&persistent_store),
             expected_response
         );
     }

src/ctap/storage.rs

@@ -265,12 +265,10 @@ impl PersistentStore {
         debug_assert_eq!(entry.tag, TAG_CREDENTIAL);
         let result = deserialize_credential(entry.data);
         debug_assert!(result.is_some());
-        if check_cred_protect
-            && result.as_ref().map_or(false, |cred| {
-                cred.cred_protect_policy
-                    == Some(CredentialProtectionPolicy::UserVerificationRequired)
-            })
-        {
+        let user_verification_required = result.as_ref().map_or(false, |cred| {
+            cred.cred_protect_policy == Some(CredentialProtectionPolicy::UserVerificationRequired)
+        });
+        if check_cred_protect && user_verification_required {
             Ok(None)
         } else {
             Ok(result)
@@ -675,7 +673,6 @@ fn _serialize_min_pin_length_rp_ids(rp_ids: Vec<String>) -> Result<Vec<u8>, Ctap
 mod test {
     use super::*;
     use crate::ctap::data_formats::{PublicKeyCredentialSource, PublicKeyCredentialType};
-    use crypto;
     use crypto::rng256::{Rng256, ThreadRng256};
 
     fn create_credential_source(
@@ -920,7 +917,7 @@ mod test {
         assert!(persistent_store.store_credential(credential).is_ok());
 
         let no_credential = persistent_store
-            .find_credential("example.com", &vec![0x00], true)
+            .find_credential("example.com", &[0x00], true)
             .unwrap();
         assert_eq!(no_credential, None);
     }
@@ -942,8 +939,8 @@ mod test {
         let master_hmac_key = master_keys_1.hmac.to_vec();
         persistent_store.reset(&mut rng).unwrap();
         let master_keys_3 = persistent_store.master_keys().unwrap();
-        assert!(master_keys_3.encryption != &master_encryption_key[..]);
-        assert!(master_keys_3.hmac != &master_hmac_key[..]);
+        assert!(master_keys_3.encryption != master_encryption_key.as_slice());
+        assert!(master_keys_3.hmac != master_hmac_key.as_slice());
     }
 
     #[test]