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add passwd_hash/2 api

This commit is contained in:
Feng 2016-01-20 15:38:51 +08:00
parent b5c514b39c
commit 4934bf54c0
1 changed files with 22 additions and 0 deletions
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22
src/emqttd_auth_mod.erl
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@ -27,6 +27,10 @@
-include("emqttd.hrl").
-export([passwd_hash/2]).
-type hash_type() :: plain | md5 | sha | sha256.
%%%=============================================================================
%%% Auth behavihour
%%%=============================================================================
@ -53,3 +57,21 @@ behaviour_info(_Other) ->
-endif.
%% @doc Password Hash
-spec passwd_hash(hash_type(), binary()) -> binary().
passwd_hash(plain, Password) ->
Password;
passwd_hash(md5, Password) ->
hexstring(crypto:hash(md5, Password));
passwd_hash(sha, Password) ->
hexstring(crypto:hash(sha, Password));
passwd_hash(sha256, Password) ->
hexstring(crypto:hash(sha256, Password)).
hexstring(<<X:128/big-unsigned-integer>>) ->
iolist_to_binary(io_lib:format("~32.16.0b", [X]));
hexstring(<<X:160/big-unsigned-integer>>) ->
iolist_to_binary(io_lib:format("~40.16.0b", [X]));
hexstring(<<X:256/big-unsigned-integer>>) ->
iolist_to_binary(io_lib:format("~64.16.0b", [X])).