feat(transport): Add AsRef impl for Certificate (#326)

Co-authored-by: IvanV <[email protected]>

tonic/src/transport/tls.rs

@@ -19,6 +19,27 @@ impl Certificate {
  let pem = pem.as_ref().into();
  Self { pem }
  }
+
+ /// Get a immutable reference to underlying certificate
+ pub fn get_ref(&self) -> &[u8] {
+ &self.pem.as_slice()
+ }
+
+ /// Get a mutable reference to underlying certificate
+ pub fn get_mut(&mut self) -> &mut [u8] {
+ self.pem.as_mut()
+ }
+
+ /// Consumes `self`, returning the underlying certificate
+ pub fn into_inner(self) -> Vec<u8> {
+ self.pem
+ }
+}
+
+impl AsRef<[u8]> for Certificate {
+ fn as_ref(&self) -> &[u8] {
+ self.pem.as_ref()
+ }
 }
 
 impl Identity {