Fix various clippy lints

src/format.rs

@@ -106,7 +106,7 @@ impl RecipientLine {
         let epk = esk.public_key();
         let epk_bytes = EphemeralKeyBytes::from_public_key(&epk);
 
-        let shared_secret = esk.diffie_hellman(&pk.public_key());
+        let shared_secret = esk.diffie_hellman(pk.public_key());
 
         let mut salt = vec![];
         salt.extend_from_slice(epk_bytes.as_bytes());

src/p256.rs

@@ -48,7 +48,7 @@ impl Recipient {
     /// This accepts both compressed (as used by the plugin) and uncompressed (as used in
     /// the YubiKey certificate) encodings.
     pub(crate) fn from_encoded(encoded: &p256::EncodedPoint) -> Option<Self> {
-        p256::PublicKey::from_encoded_point(&encoded).map(Recipient)
+        p256::PublicKey::from_encoded_point(encoded).map(Recipient)
     }
 
     /// Returns the compressed SEC-1 encoding of this recipient.

src/plugin.rs

@@ -23,7 +23,7 @@ impl RecipientPluginV1 for RecipientPlugin {
         bytes: &[u8],
     ) -> Result<(), recipient::Error> {
         if let Some(pk) = if plugin_name == PLUGIN_NAME {
-            Recipient::from_bytes(&bytes)
+            Recipient::from_bytes(bytes)
         } else {
             None
         } {
@@ -44,7 +44,7 @@ impl RecipientPluginV1 for RecipientPlugin {
         bytes: &[u8],
     ) -> Result<(), recipient::Error> {
         if let Some(stub) = if plugin_name == PLUGIN_NAME {
-            yubikey::Stub::from_bytes(&bytes, index)
+            yubikey::Stub::from_bytes(bytes, index)
         } else {
             None
         } {
@@ -88,7 +88,7 @@ impl RecipientPluginV1 for RecipientPlugin {
                     self.recipients
                         .iter()
                         .chain(yk_recipients.iter())
-                        .map(|pk| format::RecipientLine::wrap_file_key(&file_key, &pk).into())
+                        .map(|pk| format::RecipientLine::wrap_file_key(&file_key, pk).into())
                         .collect()
                 })
                 .collect())
@@ -111,7 +111,7 @@ impl IdentityPluginV1 for IdentityPlugin {
         bytes: &[u8],
     ) -> Result<(), identity::Error> {
         if let Some(stub) = if plugin_name == PLUGIN_NAME {
-            yubikey::Stub::from_bytes(&bytes, index)
+            yubikey::Stub::from_bytes(bytes, index)
         } else {
             None
         } {
@@ -145,7 +145,7 @@ impl IdentityPluginV1 for IdentityPlugin {
         for (file, stanzas) in files.iter().enumerate() {
             for (stanza_index, stanza) in stanzas.iter().enumerate() {
                 match (
-                    format::RecipientLine::from_stanza(&stanza).map(|res| {
+                    format::RecipientLine::from_stanza(stanza).map(|res| {
                         res.map_err(|_| identity::Error::Stanza {
                             file_index: file,
                             stanza_index,
@@ -225,7 +225,7 @@ impl IdentityPluginV1 for IdentityPlugin {
                 }
 
                 for (stanza_index, line) in stanzas.iter().enumerate() {
-                    match conn.unwrap_file_key(&line) {
+                    match conn.unwrap_file_key(line) {
                         Ok(file_key) => {
                             // We've managed to decrypt this file!
                             file_keys.entry(file_index).or_insert(Ok(file_key));

src/util.rs

@@ -138,7 +138,7 @@ impl Metadata {
         extract_name(cert, all)
             .map(|(name, ours)| {
                 if ours {
-                    let (pin_policy, touch_policy) = policies(&cert);
+                    let (pin_policy, touch_policy) = policies(cert);
                     (name, pin_policy, touch_policy)
                 } else {
                     // We can extract the PIN and touch policies via an attestation. This

src/yubikey.rs

@@ -358,9 +358,8 @@ impl Connection {
             None => {
                 return Ok(Err(identity::Error::Identity {
                     index: self.identity_index,
-                    message: format!(
-                        "Certificate for YubiKey identity contains an invalid PIN policy"
-                    ),
+                    message: "Certificate for YubiKey identity contains an invalid PIN policy"
+                        .to_string(),
                 }))
             }
         }