Update to Rust Edition 2021 and fix compilation errors

Cargo.toml

@@ -1,6 +1,7 @@
 [package]
 name = "redox-ssh"
 version = "0.1.0"
+edition = "2021"
 authors = ["Thomas Gatzweiler <mail@thomasgatzweiler.com>"]
 
 [lib]

src/algorithm.rs

@@ -1,8 +1,8 @@
 use std::fmt;
 use std::str::FromStr;
 
-use error::{ConnectionError, ConnectionResult};
+use crate::error::{ConnectionError, ConnectionResult};
-use key_exchange::{self, KeyExchange};
+use crate::key_exchange::{self, KeyExchange};
 
 /// Slice of implemented key exchange algorithms, ordered by preference
 pub static KEY_EXCHANGE: &[KeyExchangeAlgorithm] =

src/channel.rs

@@ -5,7 +5,8 @@ use std::os::unix::process::CommandExt;
 use std::path::PathBuf;
 use std::process::{self, Stdio};
 use std::thread::{self, JoinHandle};
-use sys;
+
+use crate::sys;
 
 pub type ChannelId = u32;
 

src/connection.rs

@@ -2,15 +2,16 @@ use std::collections::{BTreeMap, VecDeque};
 use std::io::{self, BufReader, Read, Write};
 use std::sync::Arc;
 
-use channel::{Channel, ChannelId, ChannelRequest};
-use encryption::{AesCtr, Decryptor, Encryption};
-use error::{ConnectionError, ConnectionResult as Result};
-use key_exchange::{KexResult, KeyExchange};
-use mac::{Hmac, MacAlgorithm};
-use message::MessageType;
-use packet::{Packet, ReadPacketExt, WritePacketExt};
 use rand::distributions::Standard;
-use server::ServerConfig;
+
+use crate::channel::{Channel, ChannelId, ChannelRequest};
+use crate::encryption::{AesCtr, Decryptor, Encryption};
+use crate::error::{ConnectionError, ConnectionResult as Result};
+use crate::key_exchange::{KexResult, KeyExchange};
+use crate::mac::{Hmac, MacAlgorithm};
+use crate::message::MessageType;
+use crate::packet::{Packet, ReadPacketExt, WritePacketExt};
+use crate::server::ServerConfig;
 
 #[derive(PartialEq)]
 enum ConnectionState {
@@ -364,7 +365,7 @@ impl<'a> Connection {
     }
 
     fn kex_init(&mut self, packet: Packet) -> Result<Option<Packet>> {
-        use algorithm::*;
+        use crate::algorithm::*;
 
         let (kex_algo, srv_host_key_algo, enc_algo, mac_algo, comp_algo) = {
             let mut reader = packet.reader();

src/encryption/aes_ctr.rs

@@ -1,7 +1,7 @@
 use crypto::aes::{KeySize, ctr};
 use crypto::symmetriccipher::SynchronousStreamCipher;
 
-use encryption::Encryption;
+use crate::encryption::Encryption;
 
 pub struct AesCtr {
     cipher: Box<dyn SynchronousStreamCipher + 'static>,

src/key_exchange/curve25519.rs

@@ -1,13 +1,14 @@
-use connection::{Connection, ConnectionType};
 use crypto::curve25519;
 use crypto::digest::Digest;
 use crypto::sha2::Sha256;
-use key_exchange::{KexResult, KeyExchange};
-use message::MessageType;
 use num_bigint::{BigInt, Sign};
-use packet::{Packet, ReadPacketExt, WritePacketExt};
 use rand::RngCore;
 
+use crate::connection::{Connection, ConnectionType};
+use crate::key_exchange::{KexResult, KeyExchange};
+use crate::message::MessageType;
+use crate::packet::{Packet, ReadPacketExt, WritePacketExt};
+
 const ECDH_KEX_INIT: u8 = 30;
 const ECDH_KEX_REPLY: u8 = 31;
 

src/key_exchange/mod.rs

@@ -4,8 +4,8 @@ mod curve25519;
 pub use self::curve25519::Curve25519;
 // pub use self::dh_group_sha1::DhGroupSha1;
 
-use connection::Connection;
+use crate::connection::Connection;
-use packet::Packet;
+use crate::packet::Packet;
 
 pub enum KexResult {
     Ok(Packet),

src/mac/hmac.rs

@@ -1,7 +1,8 @@
 use crypto::hmac::Hmac as rcHmac;
 use crypto::mac::Mac;
 use crypto::sha2::Sha256;
-use mac::MacAlgorithm;
+
+use crate::mac::MacAlgorithm;
 
 pub struct Hmac {
     hmac: Box<rcHmac<Sha256>>,

src/packet.rs

@@ -3,10 +3,10 @@ use std::io::{self, BufReader, Read, Result, Write};
 use std::str::{self, FromStr};
 
 use byteorder::{BigEndian, ReadBytesExt, WriteBytesExt};
-
-use message::MessageType;
 use num_bigint::BigInt;
 
+use crate::message::MessageType;
+
 pub enum Packet {
     Raw(Vec<u8>, usize),
     Payload(Vec<u8>),

src/public_key/ed25519.rs

@@ -2,8 +2,9 @@ use std::io::{self, Read, Write};
 use std::io::ErrorKind::InvalidData;
 
 use crypto::ed25519;
-use public_key::{CryptoSystem, KeyPair};
+use rand::RngCore;
-use rand::{Rng, RngCore};
+
+use crate::public_key::{CryptoSystem, KeyPair};
 
 pub static ED25519: CryptoSystem = CryptoSystem {
     id: "ed25519",
@@ -31,7 +32,7 @@ impl Ed25519KeyPair {
     }
 
     fn import(mut r: &mut dyn Read) -> io::Result<Box<dyn KeyPair>> {
-        use packet::ReadPacketExt;
+        use crate::packet::ReadPacketExt;
 
         if r.read_utf8()? != "ssh-ed25519" {
             return Err(io::Error::new(InvalidData, "not a ED25519 key"));
@@ -58,7 +59,7 @@ impl Ed25519KeyPair {
     }
 
     fn read_public(mut r: &mut dyn Read) -> io::Result<Box<dyn KeyPair>> {
-        use packet::ReadPacketExt;
+        use crate::packet::ReadPacketExt;
 
         if r.read_uint32()? != 32 {
             return Err(io::Error::new(InvalidData, "invalid ED25519 key"));
@@ -84,7 +85,7 @@ impl KeyPair for Ed25519KeyPair {
     }
 
     fn verify(&self, data: &[u8], signature: &[u8]) -> Result<bool, ()> {
-        use packet::ReadPacketExt;
+        use crate::packet::ReadPacketExt;
         use std::io::Cursor;
 
         let mut reader = Cursor::new(signature);
@@ -99,7 +100,7 @@ impl KeyPair for Ed25519KeyPair {
     }
 
     fn sign(&self, data: &[u8]) -> Result<Vec<u8>, ()> {
-        use packet::WritePacketExt;
+        use crate::packet::WritePacketExt;
         if let Some(private_key) = self.private {
             let mut result = Vec::new();
             let sig = ed25519::signature(data, &private_key);
@@ -113,13 +114,13 @@ impl KeyPair for Ed25519KeyPair {
     }
 
     fn write_public(&self, w: &mut dyn Write) -> io::Result<()> {
-        use packet::WritePacketExt;
+        use crate::packet::WritePacketExt;
         w.write_string("ssh-ed25519")?;
         w.write_bytes(&self.public)
     }
 
     fn export(&self, w: &mut dyn Write) -> io::Result<()> {
-        use packet::WritePacketExt;
+        use crate::packet::WritePacketExt;
         w.write_string("ssh-ed25519")?;
         w.write_bytes(&self.public)?;
         if let Some(private_key) = self.private {

src/server.rs

@@ -3,8 +3,8 @@ use std::net::TcpListener;
 use std::sync::Arc;
 use std::thread;
 
-use connection::{Connection, ConnectionType};
+use crate::connection::{Connection, ConnectionType};
-use public_key::KeyPair;
+use crate::public_key::KeyPair;
 
 pub struct ServerConfig {
     pub host: String,