pub unsafe extern "C" fn EverCrypt_AEAD_decrypt(
s: *mut EverCrypt_AEAD_state_s,
iv: *mut u8,
iv_len: u32,
ad: *mut u8,
ad_len: u32,
cipher: *mut u8,
cipher_len: u32,
tag: *mut u8,
dst: *mut u8,
) -> EverCrypt_Error_error_code