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-rw-r--r--lib/ssl/src/ssl_record.hrl4
-rw-r--r--lib/ssl/src/tls_record.erl175
2 files changed, 134 insertions, 45 deletions
diff --git a/lib/ssl/src/ssl_record.hrl b/lib/ssl/src/ssl_record.hrl
index ed007f58d7..a927fba0de 100644
--- a/lib/ssl/src/ssl_record.hrl
+++ b/lib/ssl/src/ssl_record.hrl
@@ -1,7 +1,7 @@
%%
%% %CopyrightBegin%
%%
-%% Copyright Ericsson AB 2007-2016. All Rights Reserved.
+%% Copyright Ericsson AB 2007-2019. All Rights Reserved.
%%
%% Licensed under the Apache License, Version 2.0 (the "License");
%% you may not use this file except in compliance with the License.
@@ -140,6 +140,8 @@
-define(ALERT, 21).
-define(HANDSHAKE, 22).
-define(APPLICATION_DATA, 23).
+-define(KNOWN_RECORD_TYPE(Type),
+ (is_integer(Type) andalso (20 =< (Type)) andalso ((Type) =< 23))).
-define(MAX_PLAIN_TEXT_LENGTH, 16384).
-define(MAX_COMPRESSED_LENGTH, (?MAX_PLAIN_TEXT_LENGTH+1024)).
-define(MAX_CIPHER_TEXT_LENGTH, (?MAX_PLAIN_TEXT_LENGTH+2048)).
diff --git a/lib/ssl/src/tls_record.erl b/lib/ssl/src/tls_record.erl
index 3c0e93a7c9..fcbb4bb48c 100644
--- a/lib/ssl/src/tls_record.erl
+++ b/lib/ssl/src/tls_record.erl
@@ -81,9 +81,12 @@ init_connection_states(Role, BeastMitigation) ->
%% Description: Given old buffer and new data from TCP, packs up a records
%% data
%%--------------------------------------------------------------------
-get_tls_records(Data, Version, Buffer) ->
- get_tls_records_aux(Version, <<Buffer/binary, Data/binary>>, []).
-
+
+get_tls_records(Data, Versions, Buffer) when is_binary(Buffer) ->
+ parse_tls_records(Versions, {[Data],byte_size(Data),[]}, undefined);
+get_tls_records(Data, Versions, {Hdr, {Front,Size,Rear}}) ->
+ parse_tls_records(Versions, {Front,Size + byte_size(Data),[Data|Rear]}, Hdr).
+
%%====================================================================
%% Encoding
%%====================================================================
@@ -384,51 +387,135 @@ initial_connection_state(ConnectionEnd, BeastMitigation) ->
server_verify_data => undefined
}.
-get_tls_records_aux({MajVer, MinVer} = Version, <<?BYTE(Type),?BYTE(MajVer),?BYTE(MinVer),
- ?UINT16(Length), Data:Length/binary, Rest/binary>>,
- Acc) when Type == ?APPLICATION_DATA;
- Type == ?HANDSHAKE;
- Type == ?ALERT;
- Type == ?CHANGE_CIPHER_SPEC ->
- get_tls_records_aux(Version, Rest, [#ssl_tls{type = Type,
- version = Version,
- fragment = Data} | Acc]);
-get_tls_records_aux(Versions, <<?BYTE(Type),?BYTE(MajVer),?BYTE(MinVer),
- ?UINT16(Length), Data:Length/binary, Rest/binary>>,
- Acc) when is_list(Versions) andalso
- ((Type == ?APPLICATION_DATA)
- orelse
- (Type == ?HANDSHAKE)
- orelse
- (Type == ?ALERT)
- orelse
- (Type == ?CHANGE_CIPHER_SPEC)) ->
- case is_acceptable_version({MajVer, MinVer}, Versions) of
+
+parse_tls_records(Versions, Q, undefined) ->
+ decode_tls_records(Versions, Q, [], undefined, undefined, undefined);
+parse_tls_records(Versions, Q, #ssl_tls{type = Type, version = Version, fragment = Length}) ->
+ decode_tls_records(Versions, Q, [], Type, Version, Length).
+
+decode_tls_records(Versions, {_,Size,_} = Q0, Acc, undefined, _Version, _Length) ->
+ if
+ 5 =< Size ->
+ {<<?BYTE(Type),?BYTE(MajVer),?BYTE(MinVer), ?UINT16(Length)>>, Q} = binary_from_front(5, Q0),
+ validate_tls_records_type(Versions, Q, Acc, Type, {MajVer,MinVer}, Length);
+ 3 =< Size ->
+ {<<?BYTE(Type),?BYTE(MajVer),?BYTE(MinVer)>>, Q} = binary_from_front(3, Q0),
+ validate_tls_records_type(Versions, Q, Acc, Type, {MajVer,MinVer}, undefined);
+ 1 =< Size ->
+ {<<?BYTE(Type)>>, Q} = binary_from_front(1, Q0),
+ validate_tls_records_type(Versions, Q, Acc, Type, undefined, undefined);
+ true ->
+ validate_tls_records_type(Versions, Q0, Acc, undefined, undefined, undefined)
+ end;
+decode_tls_records(Versions, {_,Size,_} = Q0, Acc, Type, undefined, _Length) ->
+ if
+ 4 =< Size ->
+ {<<?BYTE(MajVer),?BYTE(MinVer), ?UINT16(Length)>>, Q} = binary_from_front(4, Q0),
+ validate_tls_record_version(Versions, Q, Acc, Type, {MajVer,MinVer}, Length);
+ 2 =< Size ->
+ {<<?BYTE(MajVer),?BYTE(MinVer)>>, Q} = binary_from_front(2, Q0),
+ validate_tls_record_version(Versions, Q, Acc, Type, {MajVer,MinVer}, undefined);
+ true ->
+ validate_tls_record_version(Versions, Q0, Acc, Type, undefined, undefined)
+ end;
+decode_tls_records(Versions, {_,Size,_} = Q0, Acc, Type, Version, undefined) ->
+ if
+ 2 =< Size ->
+ {<<?UINT16(Length)>>, Q} = binary_from_front(2, Q0),
+ validate_tls_record_length(Versions, Q, Acc, Type, Version, Length);
+ true ->
+ validate_tls_record_length(Versions, Q0, Acc, Type, Version, undefined)
+ end;
+decode_tls_records(Versions, Q, Acc, Type, Version, Length) ->
+ validate_tls_record_length(Versions, Q, Acc, Type, Version, Length).
+
+validate_tls_records_type(_Versions, Q, Acc, undefined, _Version, _Length) ->
+ {lists:reverse(Acc),
+ {undefined, Q}};
+validate_tls_records_type(Versions, Q, Acc, Type, Version, Length) ->
+ if
+ ?KNOWN_RECORD_TYPE(Type) ->
+ validate_tls_record_version(Versions, Q, Acc, Type, Version, Length);
+ true ->
+ %% Not ?KNOWN_RECORD_TYPE(Type)
+ ?ALERT_REC(?FATAL, ?UNEXPECTED_MESSAGE)
+ end.
+
+validate_tls_record_version(_Versions, Q, Acc, Type, undefined, _Length) ->
+ {lists:reverse(Acc),
+ {#ssl_tls{type = Type, version = undefined, fragment = undefined}, Q}};
+validate_tls_record_version(Versions, Q, Acc, Type, Version, Length) ->
+ if
+ is_list(Versions) ->
+ case is_acceptable_version(Version, Versions) of
+ true ->
+ validate_tls_record_length(Versions, Q, Acc, Type, Version, Length);
+ false ->
+ ?ALERT_REC(?FATAL, ?BAD_RECORD_MAC)
+ end;
+ Version =:= Versions ->
+ %% Exact version match
+ validate_tls_record_length(Versions, Q, Acc, Type, Version, Length);
true ->
- get_tls_records_aux(Versions, Rest, [#ssl_tls{type = Type,
- version = {MajVer, MinVer},
- fragment = Data} | Acc]);
- false ->
?ALERT_REC(?FATAL, ?BAD_RECORD_MAC)
+ end.
+
+validate_tls_record_length(_Versions, Q, Acc, Type, Version, undefined) ->
+ {lists:reverse(Acc),
+ {#ssl_tls{type = Type, version = Version, fragment = undefined}, Q}};
+validate_tls_record_length(Versions, {_,Size0,_} = Q0, Acc, Type, Version, Length) ->
+ if
+ Length =< ?MAX_CIPHER_TEXT_LENGTH ->
+ if
+ Length =< Size0 ->
+ %% Complete record
+ {Fragment, Q} = binary_from_front(Length, Q0),
+ Record = #ssl_tls{type = Type, version = Version, fragment = Fragment},
+ decode_tls_records(Versions, Q, [Record|Acc], undefined, undefined, undefined);
+ true ->
+ {lists:reverse(Acc),
+ {#ssl_tls{type = Type, version = Version, fragment = Length}, Q0}}
+ end;
+ true ->
+ ?ALERT_REC(?FATAL, ?RECORD_OVERFLOW)
+ end.
+
+
+binary_from_front(BinSize, {Front,Size,Rear}) ->
+ binary_from_front(BinSize, Front, Size, Rear, []).
+%%
+binary_from_front(BinSize, [], Size, [_] = Rear, Acc) ->
+ %% Optimize a simple case
+ binary_from_front(BinSize, Rear, Size, [], Acc);
+binary_from_front(BinSize, [], Size, Rear, Acc) ->
+ binary_from_front(BinSize, lists:reverse(Rear), Size, [], Acc);
+binary_from_front(BinSize, [Bin|Front], Size, Rear, []) ->
+ %% Optimize a frequent case
+ case Bin of
+ <<RetBin:BinSize/binary, Rest/binary>> -> % More than enough - split here
+ {RetBin, {case Rest of
+ <<>> ->
+ Front;
+ <<_/binary>> ->
+ [Rest|Front]
+ end,Size - BinSize,Rear}};
+ <<_/binary>> -> % Not enough
+ binary_from_front(BinSize - byte_size(Bin), Front, Size, Rear, [Bin])
end;
-get_tls_records_aux(_, <<?BYTE(Type),?BYTE(_MajVer),?BYTE(_MinVer),
- ?UINT16(Length), _:Length/binary, _Rest/binary>>,
- _) when Type == ?APPLICATION_DATA;
- Type == ?HANDSHAKE;
- Type == ?ALERT;
- Type == ?CHANGE_CIPHER_SPEC ->
- ?ALERT_REC(?FATAL, ?BAD_RECORD_MAC);
-get_tls_records_aux(_, <<0:1, _CT:7, ?BYTE(_MajVer), ?BYTE(_MinVer),
- ?UINT16(Length), _/binary>>,
- _Acc) when Length > ?MAX_CIPHER_TEXT_LENGTH ->
- ?ALERT_REC(?FATAL, ?RECORD_OVERFLOW);
-get_tls_records_aux(_, Data, Acc) ->
- case size(Data) =< ?MAX_CIPHER_TEXT_LENGTH + ?INITIAL_BYTES of
- true ->
- {lists:reverse(Acc), Data};
- false ->
- ?ALERT_REC(?FATAL, ?UNEXPECTED_MESSAGE)
+binary_from_front(BinSize, [Bin|Front], Size, Rear, Acc) ->
+ case Bin of
+ <<Last:BinSize/binary, Rest/binary>> -> % More than enough - split here
+ RetBin = iolist_to_binary(lists:reverse(Acc, [Last])),
+ {RetBin,{case Rest of
+ <<>> ->
+ Front;
+ <<_/binary>> ->
+ [Rest|Front]
+ end,Size - byte_size(RetBin),Rear}};
+ <<_/binary>> -> % Not enough
+ binary_from_front(BinSize - byte_size(Bin), Front, Size, Rear, [Bin|Acc])
end.
+
%%--------------------------------------------------------------------
encode_plain_text(Type, Version, Data, ConnectionStates0) ->
{[CipherText],ConnectionStates} = encode_iolist(Type, Version, [Data], ConnectionStates0),
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-01 07:43:47 +0000