Rust 1.91 fixes

src/backup/crypto.rs

@@ -183,10 +183,10 @@ pub fn aes_decrypt_cbc_with_padding(data: &[u8], key: &EncryptionKey) -> Result<
     }
 
     // Ensure data length is a multiple of 16 bytes (AES block size)
-    let data_len = if data.len() % 16 != 0 {
-        data.len() - (data.len() % 16)
-    } else {
+    let data_len = if data.len().is_multiple_of(16) {
         data.len()
+    } else {
+        data.len() - (data.len() % 16)
     };
 
     let iv_bytes = [0u8; 16];

src/backup/util/hex.rs

@@ -13,7 +13,7 @@ use crate::error::{BackupError, Result};
 /// # Errors
 /// Returns [`BackupError::HexDecode`] if the string has odd length or invalid chars.
 pub(crate) fn hex_decode(hex_string: &str) -> Result<Vec<u8>> {
-    if hex_string.len() % 2 != 0 {
+    if !hex_string.len().is_multiple_of(2) {
         return Err(BackupError::HexDecode(
             "Input string has odd length".to_string(),
         ));

src/lib.rs

@@ -1,4 +1,5 @@
 #![forbid(unsafe_code)]
+#![deny(missing_docs)]
 #![doc = include_str!("../README.md")]
 
 pub mod backup;