wip secmod

This commit is contained in:
swrup 2025-10-16 08:23:40 +02:00
parent 592ebee9a3
commit b27ebea6ee
8 changed files with 153 additions and 109 deletions

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@ -1,26 +0,0 @@
(* TODO test *)
(* Crockford's variant of Base32
http://www.crockford.com/wrmg/base32.html
except that:
- 'U' is not excluded but also decodes to 'V'
- '-' is not allowed
- checksum is not allowed *)
(* 'I' 'L' 'O' 'U' excluded *)
let alphabet = Base32.make_alphabet "0123456789ABCDEFGHJKMNPQRSTVWXYZ"
let encode s = Base32.encode_string ~alphabet s
let decode s =
let s =
String.map
(fun c ->
match Char.uppercase_ascii c with
| 'O' -> '0'
| 'I' | 'L' -> '1'
| 'U' -> 'V'
| c -> c)
s
in
match Base32.decode ~alphabet ~off:0 ~len:(String.length s) s with
| Error (`Msg e) -> Error e
| Ok v -> Ok v