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bcrypt

1.1.5
1.2.2 1.2.1 1.2.0 1.1.5 1.1.4 1.1.3 1.1.2 1.1.0 1.0.3 1.0.2 1.0.1 1.0.0 0.5.0-p3a 0.5.0-p3

An Erlang wrapper (NIF or port program) for the OpenBSD password scheme, bcrypt.

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bcrypt src bcrypt.erl
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src/bcrypt.erl 

%% Copyright (c) 2011 Hunter Morris

%% Distributed under the MIT license; see LICENSE for details.

-module(bcrypt).

-author('Hunter Morris <hunter.morris@smarkets.com>').



%% API

-export([start/0, stop/0]).

-export([mechanism/0]).

-export([gen_salt/0, gen_salt/1, hashpw/2]).



-type mechanism() :: nif | port.

-type rounds() :: 4..31.

-type pwerr() :: invalid_salt | invalid_salt_length | invalid_rounds.



-export_type([ mechanism/0, rounds/0, pwerr/0 ]).



start() -> application:start(bcrypt).

stop()  -> application:stop(bcrypt).



-spec mechanism() -> mechanism().

mechanism() ->

    {ok, M} = application:get_env(bcrypt, mechanism),

    M.



-spec gen_salt() -> {ok, string()}.

gen_salt() ->

    do_gen_salt(mechanism()).



-spec gen_salt( rounds() ) -> {ok, string()}.

gen_salt(Rounds) ->

    do_gen_salt(mechanism(), Rounds).



-spec hashpw( string() | binary(), string() | binary() ) -> {ok, string()} | {error, pwerr()}.

hashpw(Password, Salt) ->

    do_hashpw(mechanism(), Password, Salt).



do_gen_salt(nif)  -> bcrypt_nif_worker:gen_salt();

do_gen_salt(port) -> bcrypt_pool:gen_salt().



do_gen_salt(nif, Rounds)  -> bcrypt_nif_worker:gen_salt(Rounds);

do_gen_salt(port, Rounds) -> bcrypt_pool:gen_salt(Rounds).



do_hashpw(nif, Password, Salt)  -> bcrypt_nif_worker:hashpw(Password, Salt);

do_hashpw(port, Password, Salt) -> bcrypt_pool:hashpw(Password, Salt).