Fix rust clippy lints for 1.66 (#158)

* fix clippy lints for 1.66

* cargo fmt fix

Author: jmwample

src/c_api.rs

@@ -144,7 +144,7 @@ pub fn c_decrypt_aes_gcm(key: &[u8], iv: &[u8], ciphertext: &[u8]) -> Vec<u8> {
     };
 
     unsafe {
-        pt_out.set_len(pt_len as usize);
+        pt_out.set_len(pt_len);
     }
 
     pt_out

src/elligator.rs

@@ -66,11 +66,9 @@ pub fn extract_payloads(
         //  of the 92 byte magic number here.
         let mut stego_repr_and_fsp: [u8; REPRESENTATIVE_AND_FSP_LEN] =
             [0; REPRESENTATIVE_AND_FSP_LEN];
-        let mut in_offset: usize = tls_payload.len() as usize - 92;
+        let mut in_offset: usize = tls_payload.len() - 92;
         let mut out_offset: usize = 0;
-        while in_offset < (tls_payload.len() - 3) as usize
-            && out_offset < (REPRESENTATIVE_AND_FSP_LEN - 2) as usize
-        {
+        while in_offset < (tls_payload.len() - 3) && out_offset < (REPRESENTATIVE_AND_FSP_LEN - 2) {
             extract_stego_bytes(
                 &tls_payload[in_offset..in_offset + 4],
                 &mut stego_repr_and_fsp[out_offset..out_offset + 3],
@@ -143,9 +141,9 @@ pub fn extract_payloads(
             ));
             return Err(err);
         }
-        in_offset = tls_payload.len() as usize - 92 - vsp_stego_size as usize;
+        in_offset = tls_payload.len() - 92 - vsp_stego_size as usize;
         out_offset = 0;
-        while in_offset < (tls_payload.len() - 3) as usize && out_offset < (vsp_size - 2) as usize {
+        while in_offset < (tls_payload.len() - 3) && out_offset < (vsp_size - 2) as usize {
             extract_stego_bytes(
                 &tls_payload[in_offset..in_offset + 4],
                 &mut encrypted_variable_size_payload[out_offset..out_offset + 3],

src/process_packet.rs

@@ -76,8 +76,8 @@ pub unsafe extern "C" fn rust_process_packet(
     #[allow(unused_mut)]
     let mut global = &mut *ptr;
 
-    let mut rust_view_len = frame_len as usize;
-    let rust_view = slice::from_raw_parts_mut(raw_ethframe as *mut u8, frame_len as usize);
+    let mut rust_view_len = frame_len;
+    let rust_view = slice::from_raw_parts_mut(raw_ethframe as *mut u8, frame_len);
 
     // If this is a GRE, we want to ignore the GRE overhead in our packets
     rust_view_len -= global.gre_offset;