2021 edition upgrade; MSRV 1.56 (#343)

Changes the `edition` to 2021 in both the `yubikey` and `yubikey-cli`
crates.

Removes `TryFrom`/`TryInto` imports, now that they're in the prelude.

src/cccid.rs

@@ -33,7 +33,6 @@
 use crate::{Error, Result, YubiKey};
 use rand_core::{OsRng, RngCore};
 use std::{
-    convert::TryInto,
     fmt::{self, Debug, Display},
     str,
 };

src/certificate.rs

@@ -47,9 +47,7 @@ use p256::NistP256;
 use p384::NistP384;
 use rsa::{PublicKeyParts, RsaPublicKey};
 use sha2::{Digest, Sha256};
-use std::convert::TryFrom;
-use std::fmt;
-use std::ops::DerefMut;
+use std::{fmt, ops::DerefMut};
 use x509::{der::Oid, RelativeDistinguishedName};
 use x509_parser::{parse_x509_certificate, x509::SubjectPublicKeyInfo};
 use zeroize::Zeroizing;
@@ -85,7 +83,7 @@ impl TryFrom<&[u8]> for Serial {
 
     fn try_from(bytes: &[u8]) -> Result<Serial> {
         if bytes.len() <= 20 {
-            Ok(Serial(BigUint::from_bytes_be(&bytes)))
+            Ok(Serial(BigUint::from_bytes_be(bytes)))
         } else {
             Err(Error::ParseError)
         }
@@ -365,12 +363,12 @@ impl Certificate {
                 &serial.to_bytes(),
                 &signature_algorithm,
                 // Issuer and subject are the same in self-signed certificates.
-                &subject,
+                subject,
                 Utc::now(),
                 not_after,
-                &subject,
+                subject,
                 &subject_pki,
-                &extensions,
+                extensions,
             ),
             tbs_cert.deref_mut(),
         )

src/chuid.rs

@@ -32,7 +32,6 @@
 
 use crate::{Error, Result, YubiKey};
 use std::{
-    convert::TryInto,
     fmt::{self, Debug, Display},
     str,
 };

src/config.rs

@@ -41,10 +41,7 @@ use crate::{
     Result,
 };
 use log::error;
-use std::{
-    convert::TryInto,
-    time::{Duration, SystemTime, UNIX_EPOCH},
-};
+use std::time::{Duration, SystemTime, UNIX_EPOCH};
 
 const CB_ADMIN_TIMESTAMP: usize = 0x04;
 const PROTECTED_FLAGS_1_PUK_NOBLOCK: u8 = 0x01;

src/mgm.rs

@@ -33,7 +33,6 @@
 use crate::{Error, Result};
 use log::error;
 use rand_core::{OsRng, RngCore};
-use std::convert::{TryFrom, TryInto};
 use zeroize::{Zeroize, Zeroizing};
 
 #[cfg(feature = "untested")]
@@ -138,7 +137,7 @@ impl MgmKey {
         }
 
         let mut mgm = [0u8; DES_LEN_3DES];
-        pbkdf2::<Hmac<Sha1>>(pin, &salt, ITER_MGM_PBKDF2, &mut mgm);
+        pbkdf2::<Hmac<Sha1>>(pin, salt, ITER_MGM_PBKDF2, &mut mgm);
         MgmKey::from_bytes(mgm)
     }
 
@@ -191,7 +190,7 @@ impl MgmKey {
     pub fn set_manual(&self, yubikey: &mut YubiKey, require_touch: bool) -> Result<()> {
         let txn = yubikey.begin_transaction()?;
 
-        txn.set_mgm_key(&self, require_touch).map_err(|e| {
+        txn.set_mgm_key(self, require_touch).map_err(|e| {
             // Log a warning, since the device mgm key is corrupt or we're in a state
             // where we can't set the mgm key.
             error!("could not set new derived mgm key, err = {}", e);

src/mscmap.rs

@@ -32,7 +32,6 @@
 
 use crate::{consts::CB_OBJ_MAX, piv::SlotId, serialization::*, Error, Result, YubiKey};
 use log::error;
-use std::convert::{TryFrom, TryInto};
 
 const OBJ_MSCMAP: u32 = 0x005f_ff10;
 

src/msroots.rs

@@ -111,7 +111,7 @@ impl MsRoots {
         let mut data_chunk: usize;
         let data = &self.0;
         let data_len = data.len();
-        let n_objs: usize;
+
         let txn = yubikey.begin_transaction()?;
 
         if data_len == 0 {
@@ -119,7 +119,7 @@ impl MsRoots {
         }
 
         // Calculate number of objects required to store blob
-        n_objs = (data_len / (CB_OBJ_MAX - CB_OBJ_TAG_MAX)) + 1;
+        let n_objs: usize = (data_len / (CB_OBJ_MAX - CB_OBJ_TAG_MAX)) + 1;
 
         if n_objs > 5 {
             return Err(Error::SizeError);

src/piv.rs

@@ -55,7 +55,7 @@ use crate::{
 use elliptic_curve::sec1::EncodedPoint as EcPublicKey;
 use log::{debug, error, warn};
 use rsa::{BigUint, RsaPublicKey};
-use std::{convert::TryFrom, str::FromStr};
+use std::str::FromStr;
 
 #[cfg(feature = "untested")]
 use {

src/reader.rs

@@ -3,7 +3,6 @@
 use crate::{Result, YubiKey};
 use std::{
     borrow::Cow,
-    convert::TryInto,
     ffi::CStr,
     sync::{Arc, Mutex},
 };
@@ -45,6 +44,7 @@ impl Context {
             c.list_readers(reader_names)?.collect()
         };
 
+        #[allow(clippy::needless_collect)]
         let readers: Vec<_> = reader_cstrs
             .iter()
             .map(|name| Reader::new(name, Arc::clone(ctx)))

src/setting.rs

@@ -65,7 +65,7 @@ impl Default for SettingSource {
 /// These can be configured globally in `/etc/yubico/yubikeypiv.conf` by a
 /// system administrator, or by the local user via `YUBIKEY_PIV_*` environment
 /// variables.
-#[derive(Copy, Clone, Debug)]
+#[derive(Copy, Clone, Debug, Default)]
 pub struct Setting {
     /// Boolean value
     pub value: bool,
@@ -99,7 +99,7 @@ impl Setting {
                 }
 
                 let (name, value) = {
-                    let mut parts = line.splitn(1, '=');
+                    let mut parts = line.splitn(2, '=');
                     let name = parts.next();
                     let value = parts.next();
                     match (name, value, parts.next()) {
@@ -130,12 +130,3 @@ impl Setting {
             })
     }
 }
-
-impl Default for Setting {
-    fn default() -> Self {
-        Self {
-            value: false,
-            source: SettingSource::default(),
-        }
-    }
-}

src/transaction.rs

@@ -11,7 +11,6 @@ use crate::{
     Buffer, ObjectId,
 };
 use log::{error, trace};
-use std::convert::TryInto;
 use zeroize::Zeroizing;
 
 #[cfg(feature = "untested")]

src/yubikey.rs

@@ -45,7 +45,6 @@ use log::{error, info};
 use pcsc::Card;
 use rand_core::{OsRng, RngCore};
 use std::{
-    convert::{TryFrom, TryInto},
     fmt::{self, Display},
     str::FromStr,
 };