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| author | Raimo Niskanen <[email protected]> | 2018-11-22 19:36:28 +0100 |
|---|---|---|
| committer | Raimo Niskanen <[email protected]> | 2018-11-23 10:41:11 +0100 |
| commit | 573220e4231bd6a7e4741dbd83848c2b03de048b (patch) | |
| tree | d5c6f03ade748b953dd6a00625c817434a98bc86 /lib/ssl | |
| parent | fd3c106841e481aea0dc5ebf9b9fee1d34da5638 (diff) | |
| download | otp-573220e4231bd6a7e4741dbd83848c2b03de048b.tar.gz otp-573220e4231bd6a7e4741dbd83848c2b03de048b.tar.bz2 otp-573220e4231bd6a7e4741dbd83848c2b03de048b.zip | |
Optimize split_bin
Diffstat (limited to 'lib/ssl')
| -rw-r--r-- | lib/ssl/src/tls_record.erl | 27 |
1 files changed, 13 insertions, 14 deletions
diff --git a/lib/ssl/src/tls_record.erl b/lib/ssl/src/tls_record.erl index ce7edc9dcd..cf0690f2a5 100644 --- a/lib/ssl/src/tls_record.erl +++ b/lib/ssl/src/tls_record.erl @@ -113,7 +113,7 @@ encode_handshake(Frag, Version, ConnectionStates) -> case iolist_size(Frag) of N when N > ?MAX_PLAIN_TEXT_LENGTH -> - Data = split_bin(iolist_to_binary(Frag), ?MAX_PLAIN_TEXT_LENGTH, Version, BCA, BeastMitigation), + Data = split_bin(iolist_to_binary(Frag), Version, BCA, BeastMitigation), encode_iolist(?HANDSHAKE, Data, Version, ConnectionStates); _ -> encode_plain_text(?HANDSHAKE, Version, Frag, ConnectionStates) @@ -150,7 +150,7 @@ encode_data(Frag, Version, security_parameters := #security_parameters{bulk_cipher_algorithm = BCA}}} = ConnectionStates) -> - Data = split_bin(Frag, ?MAX_PLAIN_TEXT_LENGTH, Version, BCA, BeastMitigation), + Data = split_bin(Frag, Version, BCA, BeastMitigation), encode_iolist(?APPLICATION_DATA, Data, Version, ConnectionStates). %%==================================================================== @@ -485,27 +485,26 @@ start_additional_data(Type, {MajVer, MinVer}, %% 1/n-1 splitting countermeasure Rizzo/Duong-Beast, RC4 chiphers are %% not vulnerable to this attack. -split_bin(<<FirstByte:8, Rest/binary>>, ChunkSize, Version, BCA, one_n_minus_one) when +split_bin(<<FirstByte:8, Rest/binary>>, Version, BCA, one_n_minus_one) when BCA =/= ?RC4 andalso ({3, 1} == Version orelse {3, 0} == Version) -> - do_split_bin(Rest, ChunkSize, [[FirstByte]]); + [[FirstByte]|do_split_bin(Rest)]; %% 0/n splitting countermeasure for clients that are incompatible with 1/n-1 %% splitting. -split_bin(Bin, ChunkSize, Version, BCA, zero_n) when +split_bin(Bin, Version, BCA, zero_n) when BCA =/= ?RC4 andalso ({3, 1} == Version orelse {3, 0} == Version) -> - do_split_bin(Bin, ChunkSize, [[<<>>]]); -split_bin(Bin, ChunkSize, _, _, _) -> - do_split_bin(Bin, ChunkSize, []). + [<<>>|do_split_bin(Bin)]; +split_bin(Bin, _, _, _) -> + do_split_bin(Bin). -do_split_bin(<<>>, _, Acc) -> - lists:reverse(Acc); -do_split_bin(Bin, ChunkSize, Acc) -> +do_split_bin(<<>>) -> []; +do_split_bin(Bin) -> case Bin of - <<Chunk:ChunkSize/binary, Rest/binary>> -> - do_split_bin(Rest, ChunkSize, [Chunk | Acc]); + <<Chunk:?MAX_PLAIN_TEXT_LENGTH/binary, Rest/binary>> -> + [Chunk|do_split_bin(Rest)]; _ -> - lists:reverse(Acc, [Bin]) + [Bin] end. %%-------------------------------------------------------------------- lowest_list_protocol_version(Ver, []) -> |