Trying to do TLS

src/tls_util.rs

@@ -0,0 +1,46 @@
+use std::{fs, io};
+
+use rustls::internal::pemfile;
+
+use crate::error::Error;
+
+pub fn load_certs(filename: &str) -> Result<Vec<rustls::Certificate>, Error> {
+	let certfile = fs::File::open(&filename)?;
+	let mut reader = io::BufReader::new(certfile);
+
+	let certs = pemfile::certs(&mut reader).map_err(|_| {
+		Error::Message(format!(
+			"Could not deecode certificates from file: {}",
+			filename
+		))
+	})?;
+
+	if certs.is_empty() {
+		return Err(Error::Message(format!(
+			"Invalid certificate file: {}",
+			filename
+		)));
+	}
+	Ok(certs)
+}
+
+pub fn load_private_key(filename: &str) -> Result<rustls::PrivateKey, Error> {
+	let keyfile = fs::File::open(&filename)?;
+	let mut reader = io::BufReader::new(keyfile);
+
+	let keys = pemfile::rsa_private_keys(&mut reader).map_err(|_| {
+		Error::Message(format!(
+			"Could not decode private key from file: {}",
+			filename
+		))
+	})?;
+
+	if keys.len() != 1 {
+		return Err(Error::Message(format!(
+			"Invalid private key file: {} ({} private keys)",
+			filename,
+			keys.len()
+		)));
+	}
+	Ok(keys[0].clone())
+}