module Hexa: sig .. end
The Hexa module supports the encoding and decoding of
binary data as hexadecimal strings. This is a popular format
for transmitting keys in textual form.
val encode : unit -> Cryptokit.transform
Return a transform that encodes its input in hexadecimal.
The output is twice as long as the input, and contains
no spaces or newlines.
val decode : unit -> Cryptokit.transform
Return a transform that decodes its input from hexadecimal.
The output is twice as short as the input. Blanks
(spaces, tabs, newlines) in the input are ignored.
Raise Error Bad_encoding if the input contains characters
other than hexadecimal digits and blanks.