Convert a List Int to Bytes. Each Int represents a single byte, so values are assumed to be between 0 and 255 inclusive.

import MD5
import Bytes.Decode
import Bytes.Decode.Extra


MD5.bytes "hello world"
    |> fromByteValues
    |> Bytes.Decode.decode (Bytes.Decode.Extra.list 16 Bytes.Decode.unsignedInt8)
--> Just
-->     [ 0x5e , 0xb6 , 0x3b , 0xbb
-->     , 0xe0 , 0x1e , 0xee , 0xd0
-->     , 0x93 , 0xcb , 0x22 , 0xbb
-->     , 0x8f , 0x5a , 0xcd , 0xc3
-->     ]

Convert Bytes to List Int. Each Int represents a single byte, so values will be between 0 and 255 inclusive.

import SHA1


SHA1.fromString "And the band begins to play"
    |> SHA1.toBytes
    |> toByteValues
--> [ 0xF3, 0x08, 0x73, 0x13
--> , 0xD6, 0xBC, 0xE5, 0x5B
--> , 0x60, 0x0C, 0x69, 0x2F
--> , 0xE0, 0x92, 0xF4, 0x53
--> , 0x87, 0x3F, 0xAE, 0x91
--> ]