add final hash to rust server

rust/server/Cargo.lock

@@ -81,7 +81,7 @@ dependencies = [
 ]
 
 [[package]]
-name = "itransfer_client"
+name = "itransfer_server"
 version = "0.1.0"
 dependencies = [
  "bincode",

rust/server/Cargo.toml

@@ -1,5 +1,5 @@
 [package]
-name = "itransfer_client"
+name = "itransfer_server"
 version = "0.1.0"
 edition = "2021"
 

rust/server/src/main.rs

@@ -74,9 +74,7 @@ fn main() {
 
             println!("Received file request");
 
-            let request = "files/".to_string() + req;
-
-            let file_result = std::fs::File::open(request);
+            let file_result = std::fs::File::open("files/".to_string() + req);
 
             if file_result.is_err() {
                 println!("File not found");
@@ -100,6 +98,8 @@ fn main() {
 
             socket.send_to(bincode::serialize(&packet_information).unwrap().as_slice(), remote_addr).expect("Failed to send packet information");
 
+            let mut sha512_hasher = Sha512::new();
+
             //read file chunk by chunk
 
             while let Ok(bytes_read) = file.read(&mut file_buffer) {
@@ -120,7 +120,16 @@ fn main() {
                 let packet_bytes = bincode::serialize(&packet).unwrap();
                 socket.send_to(&packet_bytes, remote_addr).expect("Failed to send packet");
                 packet_number += 1;
-            }
+
+                sha512_hasher.update(&file_buffer[..bytes_read]);
+            }
+
+            let result = sha512_hasher.finalize();
+            //add 1 byte of padding to result
+            let mut result_bytes = [0u8; 65];
+            result_bytes[..64].copy_from_slice(&result[..64]);
+
+            socket.send_to(&result_bytes, remote_addr).expect("Failed to send file hash");
         }
     }
 }