package tezos-crypto
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Tezos - X25519/XSalsa20-Poly1305 cryptography

type nonce = Bigstring.t
val nonce_size : int
val zero_nonce : nonce
val random_nonce : unit -> nonce
val increment_nonce : ?step:int -> nonce -> nonce
val generate_nonces : incoming:bool -> sent_msg:Bytes.t -> recv_msg:Bytes.t -> nonce * nonce

generate_nonces ~incoming ~sent_msg ~recv_msg generates two nonces by hashing (Blake2B) the arguments. The nonces should be used to initialize the encryption on the communication channels. Because an attacker cannot control both messages, it cannot determine the nonces that will be used to encrypt the messages. The sent message should contains a random nonce, and we should never send the exact same message twice.

module Secretbox : sig ... end
type target
val default_target : target
val make_target : float -> target
type secret_key
type public_key
type channel_key
val zerobytes : int
val boxzerobytes : int
val random_keypair : unit -> secret_key * public_key * Public_key_hash.t
val precompute : secret_key -> public_key -> channel_key
val fast_box : channel_key -> Bigstring.t -> nonce -> Bigstring.t
val fast_box_open : channel_key -> Bigstring.t -> nonce -> Bigstring.t option
val fast_box_noalloc : channel_key -> nonce -> Bytes.t -> unit
val fast_box_open_noalloc : channel_key -> nonce -> Bytes.t -> bool
val check_proof_of_work : public_key -> nonce -> target -> bool
val generate_proof_of_work : ?max:int -> public_key -> target -> nonce
val public_key_to_bytes : public_key -> Bytes.t
val public_key_of_bytes : Bytes.t -> public_key
val public_key_size : int
val secret_key_size : int
val public_key_encoding : public_key Data_encoding.t
val secret_key_encoding : secret_key Data_encoding.t
val nonce_encoding : nonce Data_encoding.t
val neuterize : secret_key -> public_key
val equal : public_key -> public_key -> bool
val pp_pk : Format.formatter -> public_key -> unit