sig
type key
val of_secret : Cstruct.t -> Nocrypto.Cipher_block.S.ECB.key
val key_sizes : int array
val block_size : int
val encrypt : key:Nocrypto.Cipher_block.S.ECB.key -> Cstruct.t -> Cstruct.t
val decrypt : key:Nocrypto.Cipher_block.S.ECB.key -> Cstruct.t -> Cstruct.t
end