diff options
Diffstat (limited to 'lib/ssh/src/ssh_bits.erl')
| -rw-r--r-- | lib/ssh/src/ssh_bits.erl | 46 |
1 files changed, 19 insertions, 27 deletions
diff --git a/lib/ssh/src/ssh_bits.erl b/lib/ssh/src/ssh_bits.erl index 8bedaaf0c5..3ce7758447 100644 --- a/lib/ssh/src/ssh_bits.erl +++ b/lib/ssh/src/ssh_bits.erl @@ -30,39 +30,31 @@ -export([random/1]). %%%---------------------------------------------------------------- -name_list([Name]) -> to_bin(Name); -name_list([Name|Ns]) -> <<(to_bin(Name))/binary, ",", (name_list(Ns))/binary>>; -name_list([]) -> <<>>. - -to_bin(A) when is_atom(A) -> list_to_binary(atom_to_list(A)); -to_bin(S) when is_list(S) -> list_to_binary(S); -to_bin(B) when is_binary(B) -> B. +name_list(NamesList) -> list_to_binary(lists:join($,, NamesList)). %%%---------------------------------------------------------------- %%% Multi Precision Integer encoding mpint(-1) -> <<0,0,0,1,16#ff>>; mpint(0) -> <<0,0,0,0>>; -mpint(X) when X < 0 -> mpint_neg(X,0,[]); -mpint(X) -> mpint_pos(X,0,[]). - -mpint_neg(-1,I,Ds=[MSB|_]) -> - if MSB band 16#80 =/= 16#80 -> - <<?UINT32((I+1)), (list_to_binary([255|Ds]))/binary>>; - true -> - <<?UINT32(I), (list_to_binary(Ds))/binary>> - end; -mpint_neg(X,I,Ds) -> - mpint_neg(X bsr 8,I+1,[(X band 255)|Ds]). - -mpint_pos(0,I,Ds=[MSB|_]) -> - if MSB band 16#80 == 16#80 -> - <<?UINT32((I+1)), (list_to_binary([0|Ds]))/binary>>; - true -> - <<?UINT32(I), (list_to_binary(Ds))/binary>> +mpint(I) when I>0 -> + <<B1,V/binary>> = binary:encode_unsigned(I), + case B1 band 16#80 of + 16#80 -> + <<(size(V)+2):32/unsigned-big-integer, 0,B1,V/binary >>; + _ -> + <<(size(V)+1):32/unsigned-big-integer, B1,V/binary >> end; -mpint_pos(X,I,Ds) -> - mpint_pos(X bsr 8,I+1,[(X band 255)|Ds]). - +mpint(N) when N<0 -> + Sxn = 8*size(binary:encode_unsigned(-N)), + Sxn1 = Sxn+8, + <<W:Sxn1>> = <<1, 0:Sxn>>, + <<B1,V/binary>> = binary:encode_unsigned(W+N), + case B1 band 16#80 of + 16#80 -> + <<(size(V)+1):32/unsigned-big-integer, B1,V/binary >>; + _ -> + <<(size(V)+2):32/unsigned-big-integer, 255,B1,V/binary >> + end. %%%---------------------------------------------------------------- %% random/1 |