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%% The contents of this file are subject to the Mozilla Public 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 https://www.mozilla.org/en-US/MPL/2.0/
%%
%% 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 Pivotal Software, Inc.
%% Copyright (c) 2020-2021 VMware, Inc. or its affiliates. All rights reserved.
%%
-module(rabbit_stream_utils).
%% API
-export([enforce_correct_stream_name/1,
write_messages/4,
parse_map/2,
auth_mechanisms/1,
auth_mechanism_to_module/2,
check_configure_permitted/3,
check_write_permitted/3,
check_read_permitted/3,
extract_stream_list/2]).
-define(MAX_PERMISSION_CACHE_SIZE, 12).
enforce_correct_stream_name(Name) ->
% from rabbit_channel
StrippedName =
binary:replace(Name, [<<"\n">>, <<"\r">>], <<"">>, [global]),
case check_name(StrippedName) of
ok ->
{ok, StrippedName};
error ->
error
end.
check_name(<<"amq.", _/binary>>) ->
error;
check_name(<<"">>) ->
error;
check_name(_Name) ->
ok.
write_messages(_ClusterLeader, undefined, _PublisherId, <<>>) ->
ok;
write_messages(ClusterLeader,
undefined,
PublisherId,
<<PublishingId:64,
0:1,
MessageSize:31,
Message:MessageSize/binary,
Rest/binary>>) ->
% FIXME handle write error
ok =
osiris:write(ClusterLeader,
undefined,
{PublisherId, PublishingId},
Message),
write_messages(ClusterLeader, undefined, PublisherId, Rest);
write_messages(ClusterLeader,
undefined,
PublisherId,
<<PublishingId:64,
1:1,
CompressionType:3,
_Unused:4,
MessageCount:16,
BatchSize:32,
Batch:BatchSize/binary,
Rest/binary>>) ->
% FIXME handle write error
ok =
osiris:write(ClusterLeader,
undefined,
{PublisherId, PublishingId},
{batch, MessageCount, CompressionType, Batch}),
write_messages(ClusterLeader, undefined, PublisherId, Rest);
write_messages(_ClusterLeader, _PublisherRef, _PublisherId, <<>>) ->
ok;
write_messages(ClusterLeader,
PublisherRef,
PublisherId,
<<PublishingId:64,
0:1,
MessageSize:31,
Message:MessageSize/binary,
Rest/binary>>) ->
% FIXME handle write error
ok = osiris:write(ClusterLeader, PublisherRef, PublishingId, Message),
write_messages(ClusterLeader, PublisherRef, PublisherId, Rest);
write_messages(ClusterLeader,
PublisherRef,
PublisherId,
<<PublishingId:64,
1:1,
CompressionType:3,
_Unused:4,
MessageCount:16,
BatchSize:32,
Batch:BatchSize/binary,
Rest/binary>>) ->
% FIXME handle write error
ok =
osiris:write(ClusterLeader,
PublisherRef,
PublishingId,
{batch, MessageCount, CompressionType, Batch}),
write_messages(ClusterLeader, PublisherRef, PublisherId, Rest).
parse_map(<<>>, _Count) ->
{#{}, <<>>};
parse_map(Content, 0) ->
{#{}, Content};
parse_map(Arguments, Count) ->
parse_map(#{}, Arguments, Count).
parse_map(Acc, <<>>, _Count) ->
{Acc, <<>>};
parse_map(Acc, Content, 0) ->
{Acc, Content};
parse_map(Acc,
<<KeySize:16,
Key:KeySize/binary,
ValueSize:16,
Value:ValueSize/binary,
Rest/binary>>,
Count) ->
parse_map(maps:put(Key, Value, Acc), Rest, Count - 1).
auth_mechanisms(Sock) ->
{ok, Configured} = application:get_env(rabbit, auth_mechanisms),
[rabbit_data_coercion:to_binary(Name)
|| {Name, Module} <- rabbit_registry:lookup_all(auth_mechanism),
Module:should_offer(Sock), lists:member(Name, Configured)].
auth_mechanism_to_module(TypeBin, Sock) ->
case rabbit_registry:binary_to_type(TypeBin) of
{error, not_found} ->
rabbit_log:warning("Unknown authentication mechanism '~p'~n",
[TypeBin]),
{error, not_found};
T ->
case {lists:member(TypeBin,
rabbit_stream_utils:auth_mechanisms(Sock)),
rabbit_registry:lookup_module(auth_mechanism, T)}
of
{true, {ok, Module}} ->
{ok, Module};
_ ->
rabbit_log:warning("Invalid authentication mechanism '~p'~n",
[T]),
{error, invalid}
end
end.
check_resource_access(User, Resource, Perm, Context) ->
V = {Resource, Context, Perm},
Cache =
case get(permission_cache) of
undefined ->
[];
Other ->
Other
end,
case lists:member(V, Cache) of
true ->
ok;
false ->
try
rabbit_access_control:check_resource_access(User,
Resource,
Perm,
Context),
CacheTail =
lists:sublist(Cache, ?MAX_PERMISSION_CACHE_SIZE - 1),
put(permission_cache, [V | CacheTail]),
ok
catch
exit:_ ->
error
end
end.
check_configure_permitted(Resource, User, Context) ->
check_resource_access(User, Resource, configure, Context).
check_write_permitted(Resource, User, Context) ->
check_resource_access(User, Resource, write, Context).
check_read_permitted(Resource, User, Context) ->
check_resource_access(User, Resource, read, Context).
extract_stream_list(<<>>, Streams) ->
Streams;
extract_stream_list(<<Length:16, Stream:Length/binary, Rest/binary>>,
Streams) ->
extract_stream_list(Rest, [Stream | Streams]).
|
