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%% This Source Code Form is subject to the terms of the Mozilla Public
%% License, v. 2.0. If a copy of the MPL was not distributed with this
%% file, You can obtain one at https://mozilla.org/MPL/2.0/.
%%
%% Copyright (c) 2007-2020 VMware, Inc. or its affiliates. All rights reserved.
%%
-module(rabbit_credential_validation).
-include("rabbit.hrl").
%% used for backwards compatibility
-define(DEFAULT_BACKEND, rabbit_credential_validator_accept_everything).
%%
%% API
%%
-export([validate/2, backend/0]).
%% Validates a username/password pair by delegating to the effective
%% `rabbit_credential_validator`. Used by `rabbit_auth_backend_internal`.
%% Note that some validators may choose to only validate passwords.
%%
%% Possible return values:
%%
%% * ok: provided credentials passed validation.
%% * {error, Error, Args}: provided password password failed validation.
-spec validate(rabbit_types:username(), rabbit_types:password()) -> 'ok' | {'error', string()}.
validate(Username, Password) ->
Backend = backend(),
Backend:validate(Username, Password).
-spec backend() -> atom().
backend() ->
case application:get_env(rabbit, credential_validator) of
undefined ->
?DEFAULT_BACKEND;
{ok, Proplist} ->
proplists:get_value(validation_backend, Proplist, ?DEFAULT_BACKEND)
end.
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