Introduce rabbit_credential_validator_regexp

1 files changed, 48 insertions, 0 deletions

diff --git a/src/rabbit_credential_validator_regexp.erl b/src/rabbit_credential_validator_regexp.erl
new file mode 100644
index 0000000000..187e679416
--- /dev/null
+++ b/src/rabbit_credential_validator_regexp.erl
@@ -0,0 +1,48 @@
+%% The contents of this file are subject to the Mozilla Public License
+%% Version 1.1 (the "License"); you may not use this file except in
+%% compliance with the License. You may obtain a copy of the License
+%% at http://www.mozilla.org/MPL/
+%%
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and
+%% limitations under the License.
+%%
+%% The Original Code is RabbitMQ.
+%%
+%% The Initial Developer of the Original Code is GoPivotal, Inc.
+%% Copyright (c) 2007-2016 Pivotal Software, Inc.  All rights reserved.
+%%
+
+-module(rabbit_credential_validator_regexp).
+
+-include("rabbit.hrl").
+
+-behaviour(rabbit_credential_validator).
+
+%%
+%% API
+%%
+
+-export([validate_password/1]).
+%% for tests
+-export([validate_password/2]).
+
+-spec validate_password(rabbit_types:password()) -> 'ok' | {'error', string(), [any()]}.
+
+validate_password(Password) ->
+    Proplist = application:get_env(rabbit, credential_validator),
+    Regexp   = case proplists:get_value(regexp, Proplist) of
+                   undefined -> {error, "rabbit.credential_validator.regexp config key is undefined"};
+                   Value     -> rabbit_data_coercion:to_list(Value)
+               end,
+    validate_password(Password, Regexp).
+
+
+-spec validate_password(rabbit_types:password(), string()) -> 'ok' | {'error', string(), [any()]}.
+
+validate_password(Password, Pattern) ->
+    case re:run(Password, Pattern) of
+        {match, _} -> ok;
+        nomatch    -> {error, "provided password does not match the validator regular expression"}
+    end.