Function cose_sign_set_external_aad

pub unsafe extern "C" fn cose_sign_set_external_aad(
    sign: *mut cose_sign_enc_t,
    ext: *const c_void,
    len: size_t,
)

cose_sign_set_external_aad adds a reference to the external data that should also be authenticated in the signature.

@param sign The sign object @param ext aditional authenticated data @param len Length of the aad