/
riak_core_security.erl
1328 lines (1197 loc) · 51.6 KB
/
riak_core_security.erl
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%% -------------------------------------------------------------------
%%
%% Copyright (c) 2013 Basho Technologies, Inc.
%%
%% This file is provided to you under the Apache License,
%% Version 2.0 (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.apache.org/licenses/LICENSE-2.0
%%
%% Unless required by applicable law or agreed to in writing,
%% software distributed under the License is distributed on an
%% "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
%% KIND, either express or implied. See the License for the
%% specific language governing permissions and limitations
%% under the License.
%%
%% -------------------------------------------------------------------
-module(riak_core_security).
%% printing functions
-export([print_users/0, print_sources/0, print_user/1,
print_groups/0, print_group/1, print_grants/1]).
%% type exports
-export_type([context/0]).
%% API
-export([authenticate/3, add_user/2, alter_user/2, del_user/1,
add_group/2, alter_group/2, del_group/1,
add_source/4, del_source/2,
add_grant/3, add_revoke/3, check_permission/2, check_permissions/2,
get_username/1, is_enabled/0, enable/0, disable/0, status/0,
get_ciphers/0, set_ciphers/1, print_ciphers/0]).
-include_lib("kernel/include/logger.hrl").
-define(DEFAULT_CIPHER_LIST,
":DHE-RSA-AES128-GCM-SHA256:DHE-DSS-AES128-GCM-SHA256"
":DHE-DSS-AES256-GCM-SHA384:DHE-RSA-AES256-GCM-SHA384"
":ADH-AES256-GCM-SHA384:ADH-AES128-GCM-SHA256"
":DHE-RSA-AES128-SHA256:DHE-RSA-AES128-SHA:DHE-DSS-AES128-SHA256"
":DHE-RSA-AES256-SHA256:DHE-DSS-AES256-SHA:DHE-RSA-AES256-SHA"
":AES128-GCM-SHA256:AES256-GCM-SHA384"
":SRP-DSS-AES-128-CBC-SHA:SRP-RSA-AES-128-CBC-SHA:DHE-DSS-AES128-SHA"
":AECDH-AES128-SHA:SRP-AES-128-CBC-SHA:ADH-AES128-SHA256:ADH-AES128-SHA"
":AES128-SHA256:AES128-SHA:SRP-DSS-AES-256-CBC-SHA"
":SRP-RSA-AES-256-CBC-SHA:DHE-DSS-AES256-SHA256:AECDH-AES256-SHA"
":SRP-AES-256-CBC-SHA:ADH-AES256-SHA256:ADH-AES256-SHA"
":AES256-SHA256:AES256-SHA:RC4-SHA"
":DHE-RSA-CAMELLIA256-SHA:DHE-DSS-CAMELLIA256-SHA:ADH-CAMELLIA256-SHA"
":CAMELLIA256-SHA:DHE-RSA-CAMELLIA128-SHA:DHE-DSS-CAMELLIA128-SHA"
":ADH-CAMELLIA128-SHA:CAMELLIA128-SHA").
-define(TOMBSTONE, '$deleted').
%% Avoid whitespace, control characters, comma, semi-colon,
%% non-standard Windows-only characters, other misc
-define(ILLEGAL, lists:seq(0, 44) ++ lists:seq(58, 63) ++
lists:seq(127, 191)).
-ifdef(TEST).
-define(REFRESH_TIME, 1).
-else.
-define(REFRESH_TIME, 1000).
-endif.
-record(context,
{username,
grants,
epoch}).
-type context() :: #context{}.
-type bucket() :: {binary(), binary()} | binary().
-type permission() :: {string()} | {string(), bucket()}.
-type userlist() :: all | [string()].
prettyprint_users([all], _) ->
"all";
prettyprint_users(Users0, Width) ->
%% my kingdom for an iolist join...
Users = [unicode:characters_to_list(U, utf8) || U <- Users0],
prettyprint_permissions(Users, Width).
print_sources() ->
Sources = riak_core_metadata:fold(fun({{Username, CIDR}, [{Source, Options}]}, Acc) ->
[{Username, CIDR, Source, Options}|Acc];
({{_, _}, [?TOMBSTONE]}, Acc) ->
Acc
end, [], {<<"security">>, <<"sources">>}),
print_sources(Sources).
print_sources(Sources) ->
GS = group_sources(Sources),
riak_core_console_table:print([{users, 20}, {cidr, 10}, {source, 10}, {options, 10}],
[[prettyprint_users(Users, 20), prettyprint_cidr(CIDR),
atom_to_list(Source), io_lib:format("~p", [Options])] ||
{Users, CIDR, Source, Options} <- GS]).
-spec print_user(Username :: string()) ->
ok | {error, term()}.
print_user(User) ->
Name = name2bin(User),
Details = user_details(Name),
case Details of
undefined ->
{error, {unknown_user, Name}};
_ ->
print_users([{Name, [Details]}])
end.
print_users() ->
Users = riak_core_metadata:fold(fun({_Username, [?TOMBSTONE]}, Acc) ->
Acc;
({Username, Options}, Acc) ->
[{Username, Options}|Acc]
end, [], {<<"security">>, <<"users">>}),
print_users(Users).
print_users(Users) ->
riak_core_console_table:print([{username, 10}, {'member of', 15}, {password, 40}, {options, 30}],
[begin
Groups = case proplists:get_value("groups", Options) of
undefined ->
"";
List ->
prettyprint_permissions([unicode:characters_to_list(R, utf8)
|| R <- List,
group_exists(R)], 20)
end,
Password = case proplists:get_value("password", Options) of
undefined ->
"";
Pw ->
proplists:get_value(hash_pass, Pw)
end,
OtherOptions = lists:keydelete("password", 1,
lists:keydelete("groups", 1,
Options)),
[Username, Groups, Password,
lists:flatten(io_lib:format("~p", [OtherOptions]))]
end ||
{Username, [Options]} <- Users]).
-spec print_group(Group :: string()) ->
ok | {error, term()}.
print_group(Group) ->
Name = name2bin(Group),
Details = group_details(Name),
case Details of
undefined ->
{error, {unknown_group, Name}};
_ ->
print_groups([{Name, [Details]}])
end.
print_groups() ->
Groups = riak_core_metadata:fold(fun({_Groupname, [?TOMBSTONE]}, Acc) ->
Acc;
({Groupname, Options}, Acc) ->
[{Groupname, Options}|Acc]
end, [], {<<"security">>, <<"groups">>}),
print_groups(Groups).
print_groups(Groups) ->
riak_core_console_table:print([{group, 10}, {'member of', 15}, {options, 30}],
[begin
GroupOptions = case proplists:get_value("groups", Options) of
undefined ->
"";
List ->
prettyprint_permissions([unicode:characters_to_list(R, utf8)
|| R <- List,
group_exists(R)], 20)
end,
OtherOptions = lists:keydelete("groups", 1, Options),
[Groupname, GroupOptions,
lists:flatten(io_lib:format("~p", [OtherOptions]))]
end ||
{Groupname, [Options]} <- Groups]).
-spec print_grants(Rolename :: string()) ->
ok | {error, term()}.
print_grants(RoleName) ->
Name = name2bin(RoleName),
case is_prefixed(Name) of
true ->
print_grants(chop_name(Name), role_type(Name));
false ->
case { print_grants(Name, user), print_grants(Name, group) } of
{{error, _}, {error, _}} ->
{error, {unknown_role, Name}};
_ ->
ok
end
end.
print_grants(User, unknown) ->
{error, {unknown_role, User}};
print_grants(User, user) ->
case user_details(User) of
undefined ->
{error, {unknown_user, User}};
_U ->
Grants = accumulate_grants(User, user),
riak_core_console_table:print(
io_lib:format("Inherited permissions (user/~ts)", [User]),
[{group, 20}, {type, 10}, {bucket, 10}, {grants, 40}],
[begin
case Bucket of
any ->
[chop_name(Username), "*", "*",
prettyprint_permissions(Permissions, 40)];
{T, B} ->
[chop_name(Username), T, B,
prettyprint_permissions(Permissions, 40)];
T ->
[chop_name(Username), T, "*",
prettyprint_permissions(Permissions, 40)]
end
end ||
{{Username, Bucket}, Permissions} <- Grants, Username /= <<"user/", User/binary>>]),
riak_core_console_table:print(
io_lib:format("Dedicated permissions (user/~ts)", [User]),
[{type, 10}, {bucket, 10}, {grants, 40}],
[begin
case Bucket of
any ->
["*", "*",
prettyprint_permissions(Permissions, 40)];
{T, B} ->
[T, B,
prettyprint_permissions(Permissions, 40)];
T ->
[T, "*",
prettyprint_permissions(Permissions, 40)]
end
end ||
{{Username, Bucket}, Permissions} <- Grants, Username == <<"user/", User/binary>>]),
GroupedGrants = group_grants(Grants),
riak_core_console_table:print(
io_lib:format("Cumulative permissions (user/~ts)", [User]),
[{type, 10}, {bucket, 10}, {grants, 40}],
[begin
case Bucket of
any ->
["*", "*",
prettyprint_permissions(Permissions, 40)];
{T, B} ->
[T, B,
prettyprint_permissions(Permissions, 40)];
T ->
[T, "*",
prettyprint_permissions(Permissions, 40)]
end
end ||
{Bucket, Permissions} <- GroupedGrants]),
ok
end;
print_grants(Group, group) ->
case group_details(Group) of
undefined ->
{error, {unknown_group, Group}};
_U ->
Grants = accumulate_grants(Group, group),
riak_core_console_table:print(
io_lib:format("Inherited permissions (group/~ts)", [Group]),
[{group, 20}, {type, 10}, {bucket, 10}, {grants, 40}],
[begin
case Bucket of
any ->
[chop_name(Groupname), "*", "*",
prettyprint_permissions(Permissions, 40)];
{T, B} ->
[chop_name(Groupname), T, B,
prettyprint_permissions(Permissions, 40)];
T ->
[chop_name(Groupname), T, "*",
prettyprint_permissions(Permissions, 40)]
end
end ||
{{Groupname, Bucket}, Permissions} <- Grants, chop_name(Groupname) /= Group]),
riak_core_console_table:print(
io_lib:format("Dedicated permissions (group/~ts)", [Group]),
[{type, 10}, {bucket, 10}, {grants, 40}],
[begin
case Bucket of
any ->
["*", "*",
prettyprint_permissions(Permissions, 40)];
{T, B} ->
[T, B,
prettyprint_permissions(Permissions, 40)];
T ->
[T, "*",
prettyprint_permissions(Permissions, 40)]
end
end ||
{{Groupname, Bucket}, Permissions} <- Grants, chop_name(Groupname) == Group]),
GroupedGrants = group_grants(Grants),
riak_core_console_table:print(
io_lib:format("Cumulative permissions (group/~ts)", [Group]),
[{type, 10}, {bucket, 10}, {grants, 40}],
[begin
case Bucket of
any ->
["*", "*",
prettyprint_permissions(Permissions, 40)];
{T, B} ->
[T, B,
prettyprint_permissions(Permissions, 40)];
T ->
[T, "*",
prettyprint_permissions(Permissions, 40)]
end
end ||
{Bucket, Permissions} <- GroupedGrants]),
ok
end.
prettyprint_permissions(Permissions, Width) ->
prettyprint_permissions(lists:sort(Permissions), Width, []).
prettyprint_permissions([], _Width, Acc) ->
string:join([string:join(Line, ", ") || Line <- lists:reverse(Acc)], ",\n");
prettyprint_permissions([Permission|Rest], Width, [H|T] =Acc) ->
case length(Permission) + lists:flatlength(H) + 2 + (2 * length(H)) > Width of
true ->
prettyprint_permissions(Rest, Width, [[Permission] | Acc]);
false ->
prettyprint_permissions(Rest, Width, [[Permission|H]|T])
end;
prettyprint_permissions([Permission|Rest], Width, Acc) ->
prettyprint_permissions(Rest, Width, [[Permission] | Acc]).
-spec check_permission(Permission :: permission(), Context :: context()) ->
{true, context()} | {false, binary(), context()}.
check_permission({Permission}, Context0) ->
Context = maybe_refresh_context(Context0),
%% The user needs to have this permission applied *globally*
%% This is for things like mapreduce with undetermined inputs or
%% permissions that don't tie to a particular bucket, like 'ping' and
%% 'stats'.
MatchG = match_grant(any, Context#context.grants),
case lists:member(Permission, MatchG) of
true ->
{true, Context};
false ->
%% no applicable grant
{false, unicode:characters_to_binary(
["Permission denied: User '",
Context#context.username, "' does not have '",
Permission, "' on any"], utf8, utf8), Context}
end;
check_permission({Permission, Bucket}, Context0) ->
Context = maybe_refresh_context(Context0),
MatchG = match_grant(Bucket, Context#context.grants),
case lists:member(Permission, MatchG) of
true ->
{true, Context};
false ->
%% no applicable grant
{false, unicode:characters_to_binary(
["Permission denied: User '",
Context#context.username, "' does not have '",
Permission, "' on ",
bucket2iolist(Bucket)], utf8, utf8), Context}
end.
check_permissions(Permission, Ctx) when is_tuple(Permission) ->
%% single permission
check_permission(Permission, Ctx);
check_permissions([], Ctx) ->
{true, Ctx};
check_permissions([Permission|Rest], Ctx) ->
case check_permission(Permission, Ctx) of
{true, NewCtx} ->
check_permissions(Rest, NewCtx);
Other ->
%% return non-standard result
Other
end.
get_username(#context{username=Username}) ->
Username.
-spec authenticate(Username::binary(), Password::binary(), ConnInfo ::
[{atom(), any()}]) -> {ok, context()} | {error, term()}.
authenticate(Username, Password, ConnInfo) ->
case user_details(Username) of
undefined ->
{error, unknown_user};
UserData ->
Sources0 = riak_core_metadata:fold(fun({{Un, CIDR}, [{Source, Options}]}, Acc) ->
[{Un, CIDR, Source, Options}|Acc];
({{_, _}, [?TOMBSTONE]}, Acc) ->
Acc
end, [], {<<"security">>, <<"sources">>}),
Sources = sort_sources(Sources0),
case match_source(Sources, Username,
proplists:get_value(ip, ConnInfo)) of
{ok, Source, SourceOptions} ->
case Source of
trust ->
%% trust always authenticates
{ok, get_context(Username)};
password ->
%% pull the password out of the userdata
case lookup("password", UserData) of
undefined ->
?LOG_WARNING("User ~p is configured for "
"password authentication, but has "
"no password", [Username]),
{error, missing_password};
PasswordData ->
HashedPass = lookup(hash_pass, PasswordData),
HashFunction = lookup(hash_func, PasswordData),
Salt = lookup(salt, PasswordData),
Iterations = lookup(iterations, PasswordData),
case riak_core_pw_auth:check_password(Password,
HashedPass,
HashFunction,
Salt,
Iterations) of
true ->
{ok, get_context(Username)};
false ->
{error, bad_password}
end
end;
certificate ->
case proplists:get_value(common_name, ConnInfo) of
undefined ->
{error, no_common_name};
CN ->
%% TODO postgres support a map from
%% common-name to username, should we?
case name2bin(CN) == Username of
true ->
{ok, get_context(Username)};
false ->
{error, common_name_mismatch}
end
end;
Source ->
%% check for a dynamically registered auth module
AuthMods = app_helper:get_env(riak_core,
auth_mods, []),
case proplists:get_value(Source, AuthMods) of
undefined ->
?LOG_WARNING("User ~p is configured with unknown "
"authentication source ~p",
[Username, Source]),
{error, unknown_source};
AuthMod ->
case AuthMod:auth(Username, Password,
UserData, SourceOptions) of
ok ->
{ok, get_context(Username)};
error ->
{error, bad_password}
end
end
end;
{error, Reason} ->
{error, Reason}
end
end.
-spec add_user(Username :: string(), Options :: [{string(), term()}]) ->
ok | {error, term()}.
add_user(Username, Options) ->
add_role(name2bin(Username), Options,
fun user_exists/1,
{<<"security">>, <<"users">>}).
-spec add_group(Groupname :: string(), Options :: [{string(), term()}]) ->
ok | {error, term()}.
add_group(Groupname, Options) ->
add_role(name2bin(Groupname), Options, fun group_exists/1,
{<<"security">>, <<"groups">>}).
add_role(<<"all">>, _Options, _Fun, _Prefix) ->
{error, reserved_name};
add_role(<<"on">>, _Options, _Fun, _Prefix) ->
{error, reserved_name};
add_role(<<"to">>, _Options, _Fun, _Prefix) ->
{error, reserved_name};
add_role(<<"from">>, _Options, _Fun, _Prefix) ->
{error, reserved_name};
add_role(<<"any">>, _Options, _Fun, _Prefix) ->
{error, reserved_name};
add_role(Name, Options, ExistenceFun, Prefix) ->
case illegal_name_chars(unicode:characters_to_list(Name, utf8)) of
false ->
case ExistenceFun(unicode:characters_to_list(Name, utf8)) of
false ->
case validate_options(Options) of
{ok, NewOptions} ->
riak_core_metadata:put(Prefix, Name, NewOptions),
ok;
Error ->
Error
end;
true ->
{error, role_exists}
end;
true ->
{error, illegal_name_char}
end.
-spec alter_user(Username :: string(), Options :: [{string(), term()}]) ->
ok | {error, term()}.
alter_user("all", _Options) ->
{error, reserved_name};
alter_user(Username, Options) ->
Name = name2bin(Username),
case user_details(Name) of
undefined ->
{error, {unknown_user, Name}};
UserData ->
case validate_options(Options) of
{ok, NewOptions} ->
MergedOptions = lists:ukeymerge(1, lists:sort(NewOptions),
lists:sort(UserData)),
riak_core_metadata:put({<<"security">>, <<"users">>},
Name, MergedOptions),
ok;
Error ->
Error
end
end.
-spec alter_group(Groupname :: string(), Options :: [{string(), term()}]) ->
ok | {error, term()}.
alter_group("all", _Options) ->
{error, reserved_name};
alter_group(Groupname, Options) ->
Name = name2bin(Groupname),
case group_details(Groupname) of
undefined ->
{error, {unknown_group, Name}};
GroupData ->
case validate_groups_option(Options) of
{ok, NewOptions} ->
MergedOptions = lists:ukeymerge(1, lists:sort(NewOptions),
lists:sort(GroupData)),
riak_core_metadata:put({<<"security">>, <<"groups">>},
Name, MergedOptions),
ok;
Error ->
Error
end
end.
-spec del_user(Username :: string()) ->
ok | {error, term()}.
del_user("all") ->
{error, reserved_name};
del_user(Username) ->
Name = name2bin(Username),
case user_exists(Name) of
false ->
{error, {unknown_user, Name}};
true ->
riak_core_metadata:delete({<<"security">>, <<"users">>},
Name),
%% delete any associated grants, so if a user with the same name
%% is added again, they don't pick up these grants
Prefix = {<<"security">>, <<"usergrants">>},
riak_core_metadata:fold(fun({Key, _Value}, Acc) ->
%% apparently destructive
%% iteration is allowed
riak_core_metadata:delete(Prefix, Key),
Acc
end, undefined,
Prefix,
[{match, {Name, '_'}}]),
delete_user_from_sources(Name),
ok
end.
-spec del_group(Groupname :: string()) ->
ok | {error, term()}.
del_group("all") ->
{error, reserved_name};
del_group(Groupname) ->
Name = name2bin(Groupname),
case group_exists(Name) of
false ->
{error, {unknown_group, Name}};
true ->
riak_core_metadata:delete({<<"security">>, <<"groups">>},
Name),
%% delete any associated grants, so if a user with the same name
%% is added again, they don't pick up these grants
Prefix = {<<"security">>, <<"groupgrants">>},
riak_core_metadata:fold(fun({Key, _Value}, Acc) ->
%% apparently destructive
%% iteration is allowed
riak_core_metadata:delete(Prefix, Key),
Acc
end, undefined,
Prefix,
[{match, {Name, '_'}}]),
delete_group_from_roles(Name),
ok
end.
-spec add_grant(userlist(), bucket() | any, [string()]) -> ok | {error, term()}.
add_grant(all, Bucket, Grants) ->
%% all is always valid
case validate_permissions(Grants) of
ok ->
add_grant_int([{all, group}], bucket2bin(Bucket), Grants);
Error ->
Error
end;
add_grant(RoleList, Bucket, Grants) ->
RoleTypes = lists:map(
fun(Name) -> {chop_name(name2bin(Name)),
role_type(name2bin(Name))} end,
RoleList
),
UnknownRoles = lists:foldl(
fun({Name, unknown}, Accum) ->
Accum ++ [Name];
({_Name, _Type}, Accum) ->
Accum
end,
[], RoleTypes),
NameOverlaps = lists:foldl(
fun({Name, both}, Accum) ->
Accum ++ [Name];
({_Name, _Type}, Accum) ->
Accum
end,
[], RoleTypes),
case check_grant_blockers(UnknownRoles, NameOverlaps,
validate_permissions(Grants)) of
none ->
add_grant_int(RoleTypes, bucket2bin(Bucket), Grants);
Error ->
Error
end.
-spec add_revoke(userlist(), bucket() | any, [string()]) -> ok | {error, term()}.
add_revoke(all, Bucket, Revokes) ->
%% all is always valid
case validate_permissions(Revokes) of
ok ->
add_revoke_int([{all, group}], bucket2bin(Bucket), Revokes);
Error ->
Error
end;
add_revoke(RoleList, Bucket, Revokes) ->
RoleTypes = lists:map(
fun(Name) -> {chop_name(name2bin(Name)),
role_type(name2bin(Name))} end,
RoleList
),
UnknownRoles = lists:foldl(
fun({Name, unknown}, Accum) ->
Accum ++ [Name];
({_Name, _Type}, Accum) ->
Accum
end,
[], RoleTypes),
NameOverlaps = lists:foldl(
fun({Name, both}, Accum) ->
Accum ++ [Name];
({_Name, _Type}, Accum) ->
Accum
end,
[], RoleTypes),
case check_grant_blockers(UnknownRoles, NameOverlaps,
validate_permissions(Revokes)) of
none ->
add_revoke_int(RoleTypes, bucket2bin(Bucket), Revokes);
Error ->
Error
end.
-spec add_source(userlist(), CIDR :: {inet:ip_address(), non_neg_integer()},
Source :: atom(),
Options :: [{string(), term()}]) -> ok | {error, term()}.
add_source(all, CIDR, Source, Options) ->
%% all is always valid
%% TODO check if there are already 'user' sources for this CIDR
%% with the same source
riak_core_metadata:put({<<"security">>, <<"sources">>},
{all, anchor_mask(CIDR)},
{Source, Options}),
ok;
add_source(Users, CIDR, Source, Options) ->
UserList = lists:map(fun name2bin/1, Users),
%% We only allow sources to be assigned to users, so don't check
%% for valid group names
UnknownUsers = unknown_roles(UserList, user),
Valid = case UnknownUsers of
[] ->
%% TODO check if there is already an 'all' source for this CIDR
%% with the same source
ok;
_ ->
{error, {unknown_users, UnknownUsers}}
end,
case Valid of
ok ->
%% add a source for each user
add_source_int(UserList, anchor_mask(CIDR), Source,
Options),
ok;
Error ->
Error
end.
del_source(all, CIDR) ->
%% all is always valid
riak_core_metadata:delete({<<"security">>, <<"sources">>},
{all, anchor_mask(CIDR)}),
ok;
del_source(Users, CIDR) ->
UserList = lists:map(fun name2bin/1, Users),
_ = [riak_core_metadata:delete({<<"security">>, <<"sources">>},
{User, anchor_mask(CIDR)}) || User <- UserList],
ok.
is_enabled() ->
try riak_core_capability:get({riak_core, security}) of
true ->
case riak_core_metadata:get({<<"security">>, <<"status">>},
enabled) of
true ->
true;
_ ->
false
end;
_ ->
false
catch
throw:{unknown_capability, {riak_core, security}} ->
false
end.
enable() ->
case riak_core_capability:get({riak_core, security}) of
true ->
riak_core_metadata:put({<<"security">>, <<"status">>},
enabled, true);
false ->
not_supported
end.
get_ciphers() ->
case riak_core_metadata:get({<<"security">>, <<"config">>}, ciphers) of
undefined ->
?DEFAULT_CIPHER_LIST;
Result ->
Result
end.
print_ciphers() ->
Ciphers = get_ciphers(),
{Good, Bad} = riak_core_ssl_util:parse_ciphers(Ciphers),
io:format("Configured ciphers~n~n~s~n~n", [Ciphers]),
io:format("Valid ciphers(~b)~n~n~s~n~n",
[length(Good), riak_core_ssl_util:print_ciphers(Good)]),
case Bad of
[] ->
ok;
_ ->
io:format("Unknown/Unsupported ciphers(~b)~n~n~s~n~n",
[length(Bad), string:join(Bad, ":")])
end.
set_ciphers(CipherList) ->
case riak_core_ssl_util:parse_ciphers(CipherList) of
{[], _} ->
%% no valid ciphers
io:format("No known or supported ciphers in list.~n"),
error;
_ ->
riak_core_metadata:put({<<"security">>, <<"config">>}, ciphers,
CipherList),
ok
end.
disable() ->
riak_core_metadata:put({<<"security">>, <<"status">>},
enabled, false).
status() ->
Enabled = riak_core_metadata:get({<<"security">>, <<"status">>}, enabled,
[{default, false}]),
case Enabled of
true ->
case riak_core_capability:get({riak_core, security}) of
true ->
enabled;
_ ->
enabled_but_no_capability
end;
_ ->
disabled
end.
%% ============
%% INTERNAL
%% ============
metadata_grant_prefix(user) ->
{<<"security">>, <<"usergrants">>};
metadata_grant_prefix(group) ->
{<<"security">>, <<"groupgrants">>}.
add_revoke_int([], _, _) ->
ok;
add_revoke_int([{Name, RoleType}|Roles], Bucket, Permissions) ->
Prefix = metadata_grant_prefix(RoleType),
RoleGrants = riak_core_metadata:get(Prefix, {Name, Bucket}),
%% check if there is currently a GRANT we can revoke
case RoleGrants of
undefined ->
%% can't REVOKE what wasn't GRANTED
add_revoke_int(Roles, Bucket, Permissions);
GrantedPermissions ->
NewPerms = [X || X <- GrantedPermissions, not lists:member(X,
Permissions)],
%% TODO - do deletes here, once cluster metadata supports it for
%% real, if NewPerms == []
case NewPerms of
[] ->
riak_core_metadata:delete(Prefix, {Name, Bucket});
_ ->
riak_core_metadata:put(Prefix, {Name, Bucket}, NewPerms)
end,
add_revoke_int(Roles, Bucket, Permissions)
end.
add_source_int([], _, _, _) ->
ok;
add_source_int([User|Users], CIDR, Source, Options) ->
riak_core_metadata:put({<<"security">>, <<"sources">>}, {User, CIDR},
{Source, Options}),
add_source_int(Users, CIDR, Source, Options).
add_grant_int([], _, _) ->
ok;
add_grant_int([{Name, RoleType}|Roles], Bucket, Permissions) ->
Prefix = metadata_grant_prefix(RoleType),
BucketPermissions = case riak_core_metadata:get(Prefix, {Name, Bucket}) of
undefined ->
[];
Perms ->
Perms
end,
NewPerms = lists:umerge(lists:sort(BucketPermissions),
lists:sort(Permissions)),
riak_core_metadata:put(Prefix, {Name, Bucket}, NewPerms),
add_grant_int(Roles, Bucket, Permissions).
match_grant(Bucket, Grants) ->
AnyGrants = proplists:get_value(any, Grants, []),
%% find the first grant that matches the bucket name and then merge in the
%% 'any' grants, if any
lists:umerge(lists:sort(lists:foldl(fun({B, P}, Acc) when Bucket == B ->
P ++ Acc;
({B, P}, Acc) when element(1, Bucket) == B ->
%% wildcard match against bucket type
P ++ Acc;
(_, Acc) ->
Acc
end, [], Grants)), lists:sort(AnyGrants)).
maybe_refresh_context(Context) ->
%% TODO replace this with a cluster metadata hash check, or something
Epoch = os:timestamp(),
case timer:now_diff(Epoch, Context#context.epoch) < ?REFRESH_TIME of
false ->
%% context has expired
get_context(Context#context.username);
_ ->
Context
end.
concat_role(user, Name) ->
<<"user/", Name/binary>>;
concat_role(group, Name) ->
<<"group/", Name/binary>>.
%% Contexts are only valid until the GRANT epoch changes, and it will change
%% whenever a GRANT or a REVOKE is performed. This is a little coarse grained
%% right now, but it'll do for the moment.
get_context(Username) when is_binary(Username) ->
Grants = group_grants(accumulate_grants(Username, user)),
#context{username=Username, grants=Grants, epoch=os:timestamp()}.
accumulate_grants(Role, Type) ->
%% The 'all' grants always apply
All = riak_core_metadata:fold(fun({{_R, _Bucket}, [?TOMBSTONE]}, A) ->
A;
({{_R, Bucket}, [Permissions]}, A) ->
[{{<<"group/all">>, Bucket},
Permissions}|A]
end, [], metadata_grant_prefix(group),
[{match, {all, '_'}}]),
{Grants, _Seen} = accumulate_grants([Role], [], All, Type),
lists:flatten(Grants).
accumulate_grants([], Seen, Acc, _Type) ->
{Acc, Seen};
accumulate_grants([Role|Roles], Seen, Acc, Type) ->
Options = role_details(Role, Type),
Groups = [G || G <- lookup("groups", Options, []),
not lists:member(G,Seen),
group_exists(G)],
{NewAcc, NewSeen} = accumulate_grants(Groups, [Role|Seen], Acc, group),
Prefix = metadata_grant_prefix(Type),
Grants = riak_core_metadata:fold(fun({{_R, _Bucket}, [?TOMBSTONE]}, A) ->
A;
({{R, Bucket}, [Permissions]}, A) ->
[{{concat_role(Type, R), Bucket},
Permissions}|A]
end, [], Prefix,
[{match, {Role, '_'}}]),
accumulate_grants(Roles, NewSeen, [Grants|NewAcc], Type).
%% lookup a key in a list of key/value tuples. Like proplists:get_value but
%% faster.
lookup(Key, List, Default) ->
case lists:keyfind(Key, 1, List) of
false ->
Default;
{Key, Value} ->
Value
end.
lookup(Key, List) ->
lookup(Key, List, undefined).
stash(Key, Value, List) ->
lists:keystore(Key, 1, List, Value).
%% @doc Get the subnet mask as an integer, stolen from an old post on
%% erlang-questions.
mask_address(Addr={_, _, _, _}, Maskbits) ->
B = list_to_binary(tuple_to_list(Addr)),
<<Subnet:Maskbits, _Host/bitstring>> = B,
Subnet;
mask_address({A, B, C, D, E, F, G, H}, Maskbits) ->
<<Subnet:Maskbits, _Host/bitstring>> = <<A:16, B:16, C:16, D:16, E:16,
F:16, G:16, H:16>>,
Subnet.
%% @doc returns the real bottom of a netmask. Eg if 192.168.1.1/16 is
%% provided, return 192.168.0.0/16
anchor_mask(Addr={_, _, _, _}, Maskbits) ->
M = mask_address(Addr, Maskbits),
Rem = 32 - Maskbits,
<<A:8, B:8, C:8, D:8>> = <<M:Maskbits, 0:Rem>>,
{{A, B, C, D}, Maskbits};
anchor_mask(Addr={_, _, _, _, _, _, _, _}, Maskbits) ->
M = mask_address(Addr, Maskbits),
Rem = 128 - Maskbits,
<<A:16, B:16, C:16, D:16, E:16, F:16, G:16, H:16>> = <<M:Maskbits, 0:Rem>>,
{{A, B, C, D, E, F, G, H}, Maskbits}.
anchor_mask({Addr, Mask}) ->
anchor_mask(Addr, Mask).