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Crypto: more compact Secretbox representation

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Vincent Bernardoff 2018-06-19 22:22:50 +02:00 committed by Benjamin Canou
parent b885b03ef6
commit dee9c470fd
1 changed files with 6 additions and 4 deletions
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10
src/lib_crypto/crypto_box.ml
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@ -31,14 +31,16 @@ module Secretbox = struct
MBytes.fill cmsg '\x00' ; MBytes.fill cmsg '\x00' ;
MBytes.blit msg 0 cmsg zerobytes msglen ; MBytes.blit msg 0 cmsg zerobytes msglen ;
box ~key ~nonce ~msg:cmsg ~cmsg ; box ~key ~nonce ~msg:cmsg ~cmsg ;
cmsg MBytes.sub cmsg boxzerobytes (msglen + zerobytes - boxzerobytes)
let box_open key cmsg nonce = let box_open key cmsg nonce =
let cmsglen = MBytes.length cmsg in let cmsglen = MBytes.length cmsg in
let msg = MBytes.create cmsglen in let msg = MBytes.create (cmsglen + boxzerobytes) in
match box_open ~key ~nonce ~cmsg ~msg with MBytes.fill msg '\x00' ;
MBytes.blit cmsg 0 msg boxzerobytes cmsglen ;
match box_open ~key ~nonce ~cmsg:msg ~msg with
| false -> None | false -> None
| true -> Some (MBytes.sub msg zerobytes (cmsglen - zerobytes)) | true -> Some (MBytes.sub msg zerobytes (cmsglen - boxzerobytes))
end end
module Public_key_hash = Blake2B.Make (Base58) (struct module Public_key_hash = Blake2B.Make (Base58) (struct