Function unwrap_key

pub fn unwrap_key(
    key: &AesKey,
    iv: Option<[u8; 8]>,
    out: &mut [u8],
    in_: &[u8],
) -> Result<usize, KeyError>

Unwrap a key, according to RFC 3394

• key: The key-encrypting-key to decrypt the wrapped key. Must be a decrypting key
• iv: The same IV used for wrapping the key
• out: The buffer to write the unwrapped key to
• in_: The input ciphertext

Returns the number of bytes written into out

Panics

Panics if either out or in_ do not have sizes that are a multiple of 8, or if in_ is not 8 bytes longer than out

This corresponds to AES_unwrap_key.