move more things from aquatic_http to aquatic_common_tcp

aquatic_common_tcp/src/network/mod.rs

@@ -1 +1,35 @@
-pub mod stream;
+pub mod stream;
+
+use std::fs::File;
+use std::io::Read;
+
+use anyhow::Context;
+use native_tls::{Identity, TlsAcceptor};
+
+use crate::config::TlsConfig;
+
+
+pub fn create_tls_acceptor(
+    config: &TlsConfig,
+) -> anyhow::Result<Option<TlsAcceptor>> {
+    if config.use_tls {
+        let mut identity_bytes = Vec::new();
+        let mut file = File::open(&config.tls_pkcs12_path)
+            .context("Couldn't open pkcs12 identity file")?;
+
+        file.read_to_end(&mut identity_bytes)
+            .context("Couldn't read pkcs12 identity file")?;
+
+        let identity = Identity::from_pkcs12(
+            &mut identity_bytes,
+            &config.tls_pkcs12_password
+        ).context("Couldn't parse pkcs12 identity file")?;
+
+        let acceptor = TlsAcceptor::new(identity)
+            .context("Couldn't create TlsAcceptor from pkcs12 identity")?;
+
+        Ok(Some(acceptor))
+    } else {
+        Ok(None)
+    }
+}