Add Windows client packaging and recovery tools

src/native.rs

@@ -11,6 +11,7 @@ use signature::{SignatureEncoding, Signer as SignatureSigner, Verifier as Signat
 use std::fs;
 use std::io::Write;
 use std::net::IpAddr;
+#[cfg(unix)]
 use std::os::unix::fs::OpenOptionsExt;
 use std::path::Path;
 use std::str::FromStr;
@@ -153,10 +154,11 @@ pub fn load_or_create_host_key(config: &ServerConfig) -> Result<SigningKey> {
         fs::create_dir_all(parent).with_context(|| format!("create {}", parent.display()))?;
     }
     let bytes = crypto::random_32();
-    let mut file = fs::OpenOptions::new()
-        .create_new(true)
-        .write(true)
-        .mode(0o600)
+    let mut options = fs::OpenOptions::new();
+    options.create_new(true).write(true);
+    #[cfg(unix)]
+    options.mode(0o600);
+    let mut file = options
         .open(&path)
         .with_context(|| format!("create {}", path.display()))?;
     file.write_all(URL_SAFE_NO_PAD.encode(bytes).as_bytes())?;
@@ -1233,11 +1235,11 @@ fn write_known_host_entries(path: &Path, entries: &[KnownHost]) -> Result<()> {
         ));
         out.push('\n');
     }
-    let mut file = fs::OpenOptions::new()
-        .create(true)
-        .truncate(true)
-        .write(true)
-        .mode(0o600)
+    let mut options = fs::OpenOptions::new();
+    options.create(true).truncate(true).write(true);
+    #[cfg(unix)]
+    options.mode(0o600);
+    let mut file = options
         .open(path)
         .with_context(|| format!("write {}", path.display()))?;
     file.write_all(out.as_bytes())