86 lines
2.7 KiB
OCaml
86 lines
2.7 KiB
OCaml
(**************************************************************************)
|
|
(* *)
|
|
(* Copyright (c) 2014 - 2016. *)
|
|
(* Dynamic Ledger Solutions, Inc. <contact@tezos.com> *)
|
|
(* *)
|
|
(* All rights reserved. No warranty, explicit or implicit, provided. *)
|
|
(* *)
|
|
(**************************************************************************)
|
|
|
|
(* Tezos Utility library - Hexadecimal encoding *)
|
|
|
|
(* From OCaml's stdlib. See [Digest.to_hex] *)
|
|
let gen_encode length get s =
|
|
let n = length s in
|
|
let result = Bytes.create (n*2) in
|
|
for i = 0 to n-1 do
|
|
Bytes.blit_string (Printf.sprintf "%02x" (get s i)) 0 result (2*i) 2;
|
|
done;
|
|
Bytes.unsafe_to_string result
|
|
|
|
let hex_of_bytes = gen_encode MBytes.length MBytes.get_uint8
|
|
let hex_encode = gen_encode String.length (fun s i -> int_of_char s.[i])
|
|
|
|
(* From OCaml's stdlib. See [Digest.from_hex]. *)
|
|
let gen_decode create set h =
|
|
let n = String.length h in
|
|
if n mod 2 <> 0 then invalid_arg ("hex_decode: " ^ h);
|
|
let digit c =
|
|
match c with
|
|
| '0'..'9' -> int_of_char c - int_of_char '0'
|
|
| 'A'..'F' -> int_of_char c - int_of_char 'A' + 10
|
|
| 'a'..'f' -> int_of_char c - int_of_char 'a' + 10
|
|
| _c -> invalid_arg ("hex_decode: " ^ h)
|
|
in
|
|
let byte i = digit h.[i] lsl 4 + digit h.[i+1] in
|
|
let result = create (n / 2) in
|
|
for i = 0 to n/2 - 1 do
|
|
set result i (byte (2 * i));
|
|
done;
|
|
result
|
|
|
|
let hex_decode s =
|
|
gen_decode Bytes.create (fun s i c -> Bytes.set s i (char_of_int c)) s |>
|
|
Bytes.unsafe_to_string
|
|
|
|
let bytes_of_hex s =
|
|
gen_decode MBytes.create MBytes.set_int8 s
|
|
|
|
(*
|
|
let hex_bytes =
|
|
let open Data_encoding in
|
|
let schema =
|
|
let open Json_schema in
|
|
create
|
|
{ title = None ;
|
|
description = None ;
|
|
default = None;
|
|
enum = None;
|
|
kind = String {
|
|
pattern = Some "^[a-zA-Z0-9]+$";
|
|
min_length = 0;
|
|
max_length = None;
|
|
};
|
|
format = None ;
|
|
id = None } in
|
|
conv ~schema hex_of_bytes (Json.wrap_error bytes_of_hex) string
|
|
|
|
let sha256 =
|
|
let open Data_encoding in
|
|
let schema =
|
|
let open Json_schema in
|
|
create
|
|
{ title = None ;
|
|
description = None ;
|
|
default = None;
|
|
enum = None;
|
|
kind = String {
|
|
pattern = Some "^[a-zA-Z0-9]+$";
|
|
min_length = 64;
|
|
max_length = Some 64;
|
|
};
|
|
format = Some "sha256" ;
|
|
id = None } in
|
|
conv ~schema hex_of_bytes (Json.wrap_error bytes_of_hex) string
|
|
*)
|