Macro is_valid_data

macro_rules! is_valid_data {
    ($key:expr) => { ... };
}

Checks if the given data is valid by ensuring none of the bytes are equal to 0xFF.

This macro checks if all elements in the provided data are non-0xFF.

Parameters

• $key: The key or data collection to check, which must be an iterable type (e.g., a slice or array).

Returns

• true if no byte in the data is 0xFF.
• false if any byte in the data is 0xFF.

Example

let key = [0x01, 0x02, 0x03, 0x04, 0x05];
assert!(is_valid_data!(key)); // All bytes are non-0xFF, so it's valid.

let invalid_key = [0xFF, 0xFF, 0xFF, 0xFF];
assert!(!is_valid_data!(invalid_key)); // Contains only 0xFF bytes, so it's invalid.