diff options
Diffstat (limited to 'lib/asn1/src/asn1rtt_per.erl')
| -rw-r--r-- | lib/asn1/src/asn1rtt_per.erl | 876 |
1 files changed, 58 insertions, 818 deletions
diff --git a/lib/asn1/src/asn1rtt_per.erl b/lib/asn1/src/asn1rtt_per.erl index 9f4b7500d8..672c84593c 100644 --- a/lib/asn1/src/asn1rtt_per.erl +++ b/lib/asn1/src/asn1rtt_per.erl @@ -18,62 +18,7 @@ %% -module(asn1rtt_per). --export([setext/1, fixextensions/2, - skipextensions/3, - set_choice/3,encode_integer/2, - encode_small_number/1, - encode_constrained_number/2, - encode_length/1, - encode_length/2, - encode_bit_string/3, - encode_object_identifier/1, - encode_relative_oid/1, - complete/1, - encode_open_type/1, - encode_GeneralString/2, - encode_GraphicString/2, - encode_TeletexString/2, - encode_VideotexString/2, - encode_ObjectDescriptor/2, - encode_UTF8String/1, - encode_octet_string/2, - encode_known_multiplier_string/4, - octets_to_complete/2]). - --define('16K',16384). --define('32K',32768). --define('64K',65536). - -%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% -%% setext(true|false) -> CompleteList -%% - -setext(false) -> - [0]; -setext(true) -> - [1]. - -fixextensions({ext,ExtPos,ExtNum},Val) -> - case fixextensions(ExtPos,ExtNum+ExtPos,Val,0) of - 0 -> []; - ExtBits -> - [encode_small_length(ExtNum)|pre_complete_bits(ExtNum,ExtBits)] - end. - -fixextensions(Pos,MaxPos,_,Acc) when Pos >= MaxPos -> - Acc; -fixextensions(Pos,ExtPos,Val,Acc) -> - Bit = case catch(element(Pos+1,Val)) of - asn1_NOVALUE -> - 0; - asn1_NOEXTVALUE -> - 0; - {'EXIT',_} -> - 0; - _ -> - 1 - end, - fixextensions(Pos+1,ExtPos,Val,(Acc bsl 1)+Bit). +-export([skipextensions/3,complete/1]). skipextensions(Bytes0, Nr, ExtensionBitstr) when is_bitstring(ExtensionBitstr) -> Prev = Nr - 1, @@ -95,270 +40,6 @@ align(BitStr) when is_bitstring(BitStr) -> <<_:AlignBits,Rest/binary>> = BitStr, Rest. -%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% -%% set_choice(Alt,Choices,Altnum) -> ListofBitSettings -%% Alt = atom() -%% Altnum = integer() | {integer(),integer()}% number of alternatives -%% Choices = [atom()] | {[atom()],[atom()]} -%% When Choices is a tuple the first list is the Rootset and the -%% second is the Extensions and then Altnum must also be a tuple with the -%% lengths of the 2 lists -%% -set_choice(Alt,{L1,L2},{Len1,_Len2}) -> - case set_choice_tag(Alt,L1) of - N when is_integer(N), Len1 > 1 -> - [0, % the value is in the root set - encode_constrained_number({0,Len1-1},N)]; - N when is_integer(N) -> - [0]; % no encoding if only 0 or 1 alternative - false -> - [1, % extension value - case set_choice_tag(Alt, L2) of - N2 when is_integer(N2) -> - encode_small_number(N2); - false -> - unknown_choice_alt - end] - end; -set_choice(Alt, L, Len) -> - case set_choice_tag(Alt, L) of - N when is_integer(N), Len > 1 -> - encode_constrained_number({0,Len-1},N); - N when is_integer(N) -> - []; % no encoding if only 0 or 1 alternative - false -> - [unknown_choice_alt] - end. - -set_choice_tag(Alt,Choices) -> - set_choice_tag(Alt,Choices,0). - -set_choice_tag(Alt,[Alt|_Rest],Tag) -> - Tag; -set_choice_tag(Alt,[_H|Rest],Tag) -> - set_choice_tag(Alt,Rest,Tag+1); -set_choice_tag(_Alt,[],_Tag) -> - false. - -%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% -%% encode_open_type(Constraint, Value) -> CompleteList -%% Value = list of bytes of an already encoded value (the list must be flat) -%% | binary -%% Contraint = not used in this version -%% -encode_open_type(Val) -> - case byte_size(Val) of - Size when Size > 255 -> - [encode_length(Size),21,<<Size:16>>,Val]; % octets implies align - Size -> - [encode_length(Size),20,Size,Val] - end. - -%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% -%% encode_integer(Constraint, Value) -> CompleteList -%% -encode_integer([{Rc,_Ec}],Val) when is_tuple(Rc) -> - try - [0|encode_integer([Rc], Val)] - catch - _:{error,{asn1,_}} -> - [1|encode_unconstrained_number(Val)] - end; -encode_integer([], Val) -> - encode_unconstrained_number(Val); -%% The constraint is the effective constraint, and in this case is a number -encode_integer([{'SingleValue',V}], V) -> - []; -encode_integer([{'ValueRange',{Lb,Ub}=VR,Range,PreEnc}],Val) - when Val >= Lb, Ub >= Val -> - %% this case when NamedNumberList - encode_constrained_number(VR, Range, PreEnc, Val); -encode_integer([{'ValueRange',{Lb,'MAX'}}], Val) when Lb =< Val -> - encode_semi_constrained_number(Lb, Val); -encode_integer([{'ValueRange',{'MIN',_}}], Val) -> - encode_unconstrained_number(Val); -encode_integer([{'ValueRange',VR={_Lb,_Ub}}], Val) -> - encode_constrained_number(VR, Val); -encode_integer(_,Val) -> - exit({error,{asn1,{illegal_value,Val}}}). - - -%% X.691:10.6 Encoding of a normally small non-negative whole number -%% Use this for encoding of CHOICE index if there is an extension marker in -%% the CHOICE -encode_small_number(Val) when Val < 64 -> - [10,7,Val]; -encode_small_number(Val) -> - [1|encode_semi_constrained_number(0, Val)]. - -%% X.691:10.7 Encoding of a semi-constrained whole number -encode_semi_constrained_number(Lb, Val) -> - Val2 = Val - Lb, - Oct = eint_positive(Val2), - Len = length(Oct), - if - Len < 128 -> - [20,Len+1,Len|Oct]; - Len < 256 -> - [encode_length(Len),20,Len|Oct]; - true -> - [encode_length(Len),21,<<Len:16>>|Oct] - end. - -encode_constrained_number({Lb,_Ub},_Range,{bits,N},Val) -> - Val2 = Val-Lb, - [10,N,Val2]; -encode_constrained_number({Lb,_Ub},_Range,{octets,N},Val) when N < 256-> - %% N is 8 or 16 (1 or 2 octets) - Val2 = Val-Lb, - [20,N,Val2]; -encode_constrained_number({Lb,_Ub},_Range,{octets,N},Val) -> % N>255 - %% N is 8 or 16 (1 or 2 octets) - Val2 = Val-Lb, - [21,<<N:16>>,Val2]; -encode_constrained_number({Lb,_Ub},Range,_,Val) -> - Val2 = Val-Lb, - if - Range =< 16#1000000 -> % max 3 octets - Octs = eint_positive(Val2), - L = length(Octs), - [encode_length({1,3},L),[20,L,Octs]]; - Range =< 16#100000000 -> % max 4 octets - Octs = eint_positive(Val2), - L = length(Octs), - [encode_length({1,4},L),[20,L,Octs]]; - Range =< 16#10000000000 -> % max 5 octets - Octs = eint_positive(Val2), - L = length(Octs), - [encode_length({1,5},L),[20,L,Octs]]; - true -> - exit({not_supported,{integer_range,Range}}) - end. - -encode_constrained_number({Lb,Ub}, Val) when Val >= Lb, Ub >= Val -> - Range = Ub - Lb + 1, - Val2 = Val - Lb, - if - Range == 1 -> []; - Range == 2 -> - [Val2]; - Range =< 4 -> - [10,2,Val2]; - Range =< 8 -> - [10,3,Val2]; - Range =< 16 -> - [10,4,Val2]; - Range =< 32 -> - [10,5,Val2]; - Range =< 64 -> - [10,6,Val2]; - Range =< 128 -> - [10,7,Val2]; - Range =< 255 -> - [10,8,Val2]; - Range =< 256 -> - [20,1,Val2]; - Range =< 65536 -> - [20,2,<<Val2:16>>]; - Range =< (1 bsl (255*8)) -> - Octs = binary:encode_unsigned(Val2), - RangeOcts = binary:encode_unsigned(Range - 1), - OctsLen = byte_size(Octs), - RangeOctsLen = byte_size(RangeOcts), - LengthBitsNeeded = minimum_bits(RangeOctsLen - 1), - [10,LengthBitsNeeded,OctsLen-1,20,OctsLen,Octs]; - true -> - exit({not_supported,{integer_range,Range}}) - end; -encode_constrained_number({_,_},Val) -> - exit({error,{asn1,{illegal_value,Val}}}). - -%% For some reason the minimum bits needed in the length field in -%% the encoding of constrained whole numbers must always be at least 2? -minimum_bits(N) when N < 4 -> 2; -minimum_bits(N) when N < 8 -> 3; -minimum_bits(N) when N < 16 -> 4; -minimum_bits(N) when N < 32 -> 5; -minimum_bits(N) when N < 64 -> 6; -minimum_bits(N) when N < 128 -> 7; -minimum_bits(_N) -> 8. - -%% X.691:10.8 Encoding of an unconstrained whole number - -encode_unconstrained_number(Val) -> - Oct = if - Val >= 0 -> - eint(Val, []); - true -> - enint(Val, []) - end, - Len = length(Oct), - if - Len < 128 -> - [20,Len + 1,Len|Oct]; - Len < 256 -> - [20,Len + 2,<<2:2,Len:14>>|Oct]; - true -> - [encode_length(Len),21,<<Len:16>>|Oct] - end. - -%% used for positive Values which don't need a sign bit -%% returns a list -eint_positive(Val) -> - case eint(Val,[]) of - [0,B1|T] -> - [B1|T]; - T -> - T - end. - - -eint(0, [B|Acc]) when B < 128 -> - [B|Acc]; -eint(N, Acc) -> - eint(N bsr 8, [N band 16#ff| Acc]). - -enint(-1, [B1|T]) when B1 > 127 -> - [B1|T]; -enint(N, Acc) -> - enint(N bsr 8, [N band 16#ff|Acc]). - -%% X.691:10.9 Encoding of a length determinant -%%encode_small_length(undefined,Len) -> % null means no UpperBound -%% encode_small_number(Len). - -%% X.691:10.9.3.5 -%% X.691:10.9.3.7 -encode_length(Len) -> % unconstrained - if - Len < 128 -> - [20,1,Len]; - Len < 16384 -> - <<20,2,2:2,Len:14>>; - true -> % should be able to endode length >= 16384 i.e. fragmented length - exit({error,{asn1,{encode_length,{nyi,above_16k}}}}) - end. - -encode_length({C,[]}, Len) -> - case C of - {Lb,Ub}=Vr when Lb =< Len, Len =< Ub -> - [0|encode_constrained_number(Vr, Len)]; - _ -> - [1|encode_length(Len)] - end; -encode_length(Len, Len) -> - []; -encode_length(Vr, Len) -> - encode_constrained_number(Vr, Len). - -%% X.691 10.9.3.4 (only used for length of bitmap that prefixes extension -%% additions in a sequence or set -encode_small_length(Len) when Len =< 64 -> - [10,7,Len-1]; -encode_small_length(Len) -> - [1,encode_length(Len)]. - - decode_length(Buffer) -> % un-constrained case align(Buffer) of <<0:1,Oct:7,Rest/binary>> -> @@ -370,511 +51,70 @@ decode_length(Buffer) -> % un-constrained exit({error,{asn1,{decode_length,{nyi,above_16k}}}}) end. -%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% -%% bitstring NamedBitList -%% Val can be of: -%% - [identifiers] where only named identifers are set to one, -%% the Constraint must then have some information of the -%% bitlength. -%% - [list of ones and zeroes] all bits -%% - integer value representing the bitlist -%% C is constraint Len, only valid when identifiers - - -%% when the value is a list of {Unused,BinBits}, where -%% Unused = integer(), -%% BinBits = binary(). - -encode_bit_string(C, Bits, NamedBitList) when is_bitstring(Bits) -> - PadLen = (8 - (bit_size(Bits) band 7)) band 7, - Compact = {PadLen,<<Bits/bitstring,0:PadLen>>}, - encode_bin_bit_string(C, Compact, NamedBitList); -encode_bit_string(C, {Unused,BinBits}=Bin, NamedBitList) - when is_integer(Unused), is_binary(BinBits) -> - encode_bin_bit_string(C,Bin,NamedBitList); - -%% when the value is a list of named bits - -encode_bit_string(C, LoNB=[FirstVal | _RestVal], NamedBitList) when is_atom(FirstVal) -> - ToSetPos = get_all_bitposes(LoNB, NamedBitList, []), - BitList = make_and_set_list(ToSetPos,0), - encode_bit_string(C,BitList,NamedBitList);% consider the constraint - -encode_bit_string(C, BL=[{bit,_} | _RestVal], NamedBitList) -> - ToSetPos = get_all_bitposes(BL, NamedBitList, []), - BitList = make_and_set_list(ToSetPos,0), - encode_bit_string(C,BitList,NamedBitList); - -%% when the value is a list of ones and zeroes -encode_bit_string(Int, BitListValue, _) - when is_list(BitListValue),is_integer(Int),Int =< 16 -> - %% The type is constrained by a single value size constraint - %% range_check(Int,length(BitListValue)), - [40,Int,length(BitListValue),BitListValue]; -encode_bit_string(Int, BitListValue, _) - when is_list(BitListValue),is_integer(Int), Int =< 255 -> - %% The type is constrained by a single value size constraint - %% range_check(Int,length(BitListValue)), - [2,40,Int,length(BitListValue),BitListValue]; -encode_bit_string(Int, BitListValue, _) - when is_list(BitListValue),is_integer(Int), Int < ?'64K' -> - {Code,DesiredLength,Length} = - case length(BitListValue) of - B1 when B1 > Int -> - exit({error,{'BIT_STRING_length_greater_than_SIZE', - Int,BitListValue}}); - B1 when B1 =< 255,Int =< 255 -> - {40,Int,B1}; - B1 when B1 =< 255 -> - {42,<<Int:16>>,B1}; - B1 -> - {43,<<Int:16>>,<<B1:16>>} - end, - %% The type is constrained by a single value size constraint - [2,Code,DesiredLength,Length,BitListValue]; -encode_bit_string(no, BitListValue,[]) - when is_list(BitListValue) -> - [encode_length(length(BitListValue)), - 2|BitListValue]; -encode_bit_string({{Fix,Fix},Ext}, BitListValue,[]) - when is_integer(Fix), is_list(Ext) -> - case length(BitListValue) of - Len when Len =< Fix -> - [0|encode_bit_string(Fix, BitListValue, [])]; - _ -> - [1|encode_bit_string(no, BitListValue, [])] - end; -encode_bit_string(C, BitListValue,[]) - when is_list(BitListValue) -> - [encode_length(C, length(BitListValue)), - 2|BitListValue]; -encode_bit_string(no, BitListValue,_NamedBitList) - when is_list(BitListValue) -> - %% this case with an unconstrained BIT STRING can be made more efficient - %% if the complete driver can take a special code so the length field - %% is encoded there. - NewBitLVal = lists:reverse(lists:dropwhile(fun(0)->true;(1)->false end, - lists:reverse(BitListValue))), - [encode_length(length(NewBitLVal)),2|NewBitLVal]; -encode_bit_string({{Fix,Fix},Ext}, BitListValue, NamedBitList) - when is_integer(Fix), is_list(Ext) -> - case length(BitListValue) of - Len when Len =< Fix -> - [0|encode_bit_string(Fix, BitListValue, NamedBitList)]; - _ -> - [1|encode_bit_string(no, BitListValue, NamedBitList)] - end; -encode_bit_string(C, BitListValue, _NamedBitList) - when is_list(BitListValue) -> % C = {_,'MAX'} - NewBitLVal = bit_string_trailing_zeros(BitListValue, C), - [encode_length(C, length(NewBitLVal)),2|NewBitLVal]; - - -%% when the value is an integer -encode_bit_string(C, IntegerVal, NamedBitList) when is_integer(IntegerVal)-> - BitList = int_to_bitlist(IntegerVal), - encode_bit_string(C,BitList,NamedBitList). - -bit_string_trailing_zeros(BitList,C) when is_integer(C) -> - bit_string_trailing_zeros1(BitList,C,C); -bit_string_trailing_zeros(BitList,{Lb,Ub}) when is_integer(Lb) -> - bit_string_trailing_zeros1(BitList,Lb,Ub); -bit_string_trailing_zeros(BitList,{{Lb,Ub},_}) when is_integer(Lb) -> - bit_string_trailing_zeros1(BitList,Lb,Ub); -bit_string_trailing_zeros(BitList,_) -> - BitList. - -bit_string_trailing_zeros1(BitList,Lb,Ub) -> - case length(BitList) of - Lb -> BitList; - B when B < Lb -> BitList++lists:duplicate(Lb-B, 0); - D -> F = fun(L,LB,LB,_,_)->lists:reverse(L); - ([0|R],L1,LB,UB,Fun)->Fun(R,L1-1,LB,UB,Fun); - (L,L1,_,UB,_)when L1 =< UB -> lists:reverse(L); - (_,_L1,_,_,_) ->exit({error,{list_length_BIT_STRING, - BitList}}) end, - F(lists:reverse(BitList),D,Lb,Ub,F) - end. - -%% encode_bin_bit_string/3, when value is a tuple of Unused and BinBits. -%% Unused = integer(),i.e. number unused bits in least sign. byte of -%% BinBits = binary(). -encode_bin_bit_string(C, {Unused,BinBits}, _NamedBitList) - when is_integer(C),C=<16 -> - range_check(C, bit_size(BinBits) - Unused), - [45,C,byte_size(BinBits),BinBits]; -encode_bin_bit_string(C, {Unused,BinBits}, _NamedBitList) - when is_integer(C), C =< 255 -> - range_check(C, bit_size(BinBits) - Unused), - [2,45,C,byte_size(BinBits),BinBits]; -encode_bin_bit_string(C, {Unused,BinBits}, _NamedBitList) - when is_integer(C), C =< 65535 -> - range_check(C, bit_size(BinBits) - Unused), - case byte_size(BinBits) of - Size when Size =< 255 -> - [2,46,<<C:16>>,Size,BinBits]; - Size -> - [2,47,<<C:16>>,<<Size:16>>,BinBits] - end; -encode_bin_bit_string(C,UnusedAndBin={_,_},NamedBitList) -> - {Unused1,Bin1} = - %% removes all trailing bits if NamedBitList is not empty - remove_trailing_bin(NamedBitList,UnusedAndBin), - case C of - {Lb,Ub} when is_integer(Lb),is_integer(Ub) -> - Size = byte_size(Bin1), - [encode_length({Lb,Ub}, Size*8 - Unused1), - 2,octets_unused_to_complete(Unused1,Size,Bin1)]; - no -> - Size = byte_size(Bin1), - [encode_length(Size*8 - Unused1), - 2|octets_unused_to_complete(Unused1, Size, Bin1)]; - {{Fix,Fix},Ext} when is_integer(Fix),is_list(Ext) -> - case byte_size(Bin1)*8 - Unused1 of - Size when Size =< Fix -> - [0|encode_bin_bit_string(Fix,UnusedAndBin,NamedBitList)]; - _Size -> - [1|encode_bin_bit_string(no,UnusedAndBin,NamedBitList)] - end; - Sc -> - Size = byte_size(Bin1), - [encode_length(Sc, Size*8 - Unused1), - 2|octets_unused_to_complete(Unused1,Size,Bin1)] - end. - -range_check(C,C) when is_integer(C) -> - ok; -range_check(C1,C2) when is_integer(C1) -> - exit({error,{asn1,{bit_string_out_of_range,{C1,C2}}}}). - -remove_trailing_bin([], {Unused,Bin}) -> - {Unused,Bin}; -remove_trailing_bin(_NamedNumberList,{_Unused,<<>>}) -> - {0,<<>>}; -remove_trailing_bin(NamedNumberList, {_Unused,Bin}) -> - Size = byte_size(Bin)-1, - <<Bfront:Size/binary, LastByte:8>> = Bin, - %% clear the Unused bits to be sure - Unused1 = trailingZeroesInNibble(LastByte band 15), - Unused2 = - case Unused1 of - 4 -> - 4 + trailingZeroesInNibble(LastByte bsr 4); - _ -> Unused1 - end, - case Unused2 of - 8 -> - remove_trailing_bin(NamedNumberList,{0,Bfront}); - _ -> - {Unused2,Bin} - end. - - -trailingZeroesInNibble(0) -> - 4; -trailingZeroesInNibble(1) -> - 0; -trailingZeroesInNibble(2) -> - 1; -trailingZeroesInNibble(3) -> - 0; -trailingZeroesInNibble(4) -> - 2; -trailingZeroesInNibble(5) -> - 0; -trailingZeroesInNibble(6) -> - 1; -trailingZeroesInNibble(7) -> - 0; -trailingZeroesInNibble(8) -> - 3; -trailingZeroesInNibble(9) -> - 0; -trailingZeroesInNibble(10) -> - 1; -trailingZeroesInNibble(11) -> - 0; -trailingZeroesInNibble(12) -> %#1100 - 2; -trailingZeroesInNibble(13) -> - 0; -trailingZeroesInNibble(14) -> - 1; -trailingZeroesInNibble(15) -> - 0. - - -%%%%%%%%%%%%%%% -%% - -int_to_bitlist(Int) when is_integer(Int), Int > 0 -> - [Int band 1 | int_to_bitlist(Int bsr 1)]; -int_to_bitlist(0) -> - []. - - -%%%%%%%%%%%%%%%%%% -%% get_all_bitposes([list of named bits to set], named_bit_db, []) -> -%% [sorted_list_of_bitpositions_to_set] - -get_all_bitposes([{bit,ValPos}|Rest], NamedBitList, Ack) -> - get_all_bitposes(Rest, NamedBitList, [ValPos | Ack ]); - -get_all_bitposes([Val | Rest], NamedBitList, Ack) -> - case lists:keyfind(Val, 1, NamedBitList) of - {_ValName, ValPos} -> - get_all_bitposes(Rest, NamedBitList, [ValPos | Ack]); - false -> - exit({error,{asn1, {bitstring_namedbit, Val}}}) - end; -get_all_bitposes([], _NamedBitList, Ack) -> - lists:sort(Ack). - -%%%%%%%%%%%%%%%%%% -%% make_and_set_list([list of positions to set to 1])-> -%% returns list with all in SetPos set. -%% in positioning in list the first element is 0, the second 1 etc.., but -%% - -make_and_set_list([XPos|SetPos], XPos) -> - [1 | make_and_set_list(SetPos, XPos + 1)]; -make_and_set_list([Pos|SetPos], XPos) -> - [0 | make_and_set_list([Pos | SetPos], XPos + 1)]; -make_and_set_list([], _) -> - []. - - - -%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% -%% X.691:16 -%% encode_octet_string(Constraint, Val) -%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% - -encode_octet_string({{Sv,Sv},Ext}=SZ, Val) when is_list(Ext), Sv =< 2 -> - Len = length(Val), - try - case encode_length(SZ, Len) of - [0|_]=EncLen -> - [EncLen,45,Sv*8,Sv,Val]; - [_|_]=EncLen -> - [EncLen|octets_to_complete(Len, Val)] - end - catch - exit:{error,{asn1,{encode_length,_}}} -> - encode_fragmented_octet_string(Val) - end; -encode_octet_string({_,_}=SZ, Val) -> - Len = length(Val), - try - [encode_length(SZ, Len),2|octets_to_complete(Len, Val)] - catch - exit:{error,{asn1,{encode_length,_}}} -> - encode_fragmented_octet_string(Val) - end; -encode_octet_string(Sv, Val) when is_integer(Sv) -> - encode_fragmented_octet_string(Val); -encode_octet_string(no, Val) -> - Len = length(Val), - try - [encode_length(Len),2|octets_to_complete(Len, Val)] - catch - exit:{error,{asn1,{encode_length,_}}} -> - encode_fragmented_octet_string(Val) - end. - -encode_fragmented_octet_string(Val) -> - Bin = iolist_to_binary(Val), - efos_1(Bin). - -efos_1(<<B1:16#C000/binary,B2:16#4000/binary,T/binary>>) -> - [20,1,<<3:2,4:6>>, - octets_to_complete(16#C000, B1), - octets_to_complete(16#4000, B2)|efos_1(T)]; -efos_1(<<B:16#C000/binary,T/binary>>) -> - [20,1,<<3:2,3:6>>,octets_to_complete(16#C000, B)|efos_1(T)]; -efos_1(<<B:16#8000/binary,T/binary>>) -> - [20,1,<<3:2,2:6>>,octets_to_complete(16#8000, B)|efos_1(T)]; -efos_1(<<B:16#4000/binary,T/binary>>) -> - [20,1,<<3:2,1:6>>,octets_to_complete(16#4000, B)|efos_1(T)]; -efos_1(<<>>) -> - [20,1,0]; -efos_1(<<B/bitstring>>) -> - Len = byte_size(B), - [encode_length(Len)|octets_to_complete(Len, B)]. - -%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% -%% Restricted char string types -%% (NumericString, PrintableString,VisibleString,IA5String,BMPString,UniversalString) -%% X.691:26 and X.680:34-36 - -encode_restricted_string(Val) when is_list(Val)-> - Len = length(Val), - [encode_length(Len)|octets_to_complete(Len, Val)]. - -encode_known_multiplier_string(SizeC, NumBits, CharOutTab, Val) -> - Result = chars_encode2(Val, NumBits, CharOutTab), - case SizeC of - Ub when is_integer(Ub), Ub*NumBits < 16 -> - Result; - Ub when is_integer(Ub) -> - [2,Result]; - {{_,Ub},Ext}=SZ when is_list(Ext) -> - Len = length(Val), - case encode_length(SZ, Len) of - [0|_]=EncLen when Ub*NumBits < 16 -> - [EncLen,45,Len*NumBits,Len,Val]; - [_|_]=EncLen -> - [EncLen,2|Result] - end; - {_,Ub}=Range -> - [encode_length(Range, length(Val))| - if - Ub*NumBits < 16 -> Result; - true -> [2|Result] - end]; - no -> - [encode_length(length(Val)),2,Result] - end. - -encode_GeneralString(_C,Val) -> - encode_restricted_string(Val). - -encode_GraphicString(_C,Val) -> - encode_restricted_string(Val). - -encode_ObjectDescriptor(_C,Val) -> - encode_restricted_string(Val). - -encode_TeletexString(_C,Val) -> % equivalent with T61String - encode_restricted_string(Val). - -encode_VideotexString(_C,Val) -> - encode_restricted_string(Val). - - -%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% -%% chars_encode(C,StringType,Value) -> ValueList -%% -%% encodes chars according to the per rules taking the constraint -%% PermittedAlphabet into account. -%% -%% This function only encodes the value part and NOT the length. - -chars_encode2([H|T],NumBits,T1={Min,Max,notab}) when H =< Max, H >= Min -> - [pre_complete_bits(NumBits,H-Min)|chars_encode2(T,NumBits,T1)]; -chars_encode2([H|T],NumBits,T1={Min,Max,Tab}) when H =< Max, H >= Min -> - [pre_complete_bits(NumBits,exit_if_false(H,element(H-Min+1,Tab)))| - chars_encode2(T,NumBits,T1)]; -chars_encode2([{A,B,C,D}|T],NumBits,T1={Min,_Max,notab}) -> - %% no value range check here (ought to be, but very expensive) - [pre_complete_bits(NumBits, - ((((((A bsl 8)+B) bsl 8)+C) bsl 8)+D)-Min)| - chars_encode2(T,NumBits,T1)]; -chars_encode2([H={A,B,C,D}|T],NumBits,{Min,Max,Tab}) -> - %% no value range check here (ought to be, but very expensive) - [pre_complete_bits(NumBits,exit_if_false(H,element(((((((A bsl 8)+B) bsl 8)+C) bsl 8)+D)-Min,Tab)))|chars_encode2(T,NumBits,{Min,Max,notab})]; -chars_encode2([H|_T],_NumBits,{_Min,_Max,_Tab}) -> - exit({error,{asn1,{illegal_char_value,H}}}); -chars_encode2([],_,_) -> - []. - -exit_if_false(V,false)-> - exit({error,{asn1,{"illegal value according to Permitted alphabet constraint",V}}}); -exit_if_false(_,V) ->V. - -pre_complete_bits(NumBits,Val) when NumBits =< 8 -> - [10,NumBits,Val]; -pre_complete_bits(NumBits,Val) when NumBits =< 16 -> - [10,NumBits-8,Val bsr 8,10,8,(Val band 255)]; -pre_complete_bits(NumBits,Val) when NumBits =< 2040 -> % 255 * 8 - Unused = (8 - (NumBits rem 8)) rem 8, - Len = NumBits + Unused, - [30,Unused,Len div 8,<<(Val bsl Unused):Len>>]. - - -%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% -%% encode_UTF8String(Val) -> CompleteList -%% Val -> <<utf8encoded binary>> -%% CompleteList -> [apropriate codes and values for driver complete] -%% -encode_UTF8String(Val) when is_binary(Val) -> - Sz = byte_size(Val), - [encode_length(Sz),octets_to_complete(Sz, Val)]; -encode_UTF8String(Val) -> - encode_UTF8String(list_to_binary(Val)). - - -%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% -%% encode_object_identifier(Val) -> CompleteList -%% encode_object_identifier({Name,Val}) -> CompleteList -%% Val -> {Int1,Int2,...,IntN} % N >= 2 -%% Name -> atom() -%% Int1 -> integer(0..2) -%% Int2 -> integer(0..39) when Int1 (0..1) else integer() -%% Int3-N -> integer() -%% CompleteList -> [{bits,8,Val}|{octets,Ol}|align|...] -%% -encode_object_identifier(Val) -> - OctetList = e_object_identifier(Val), - Octets = list_to_binary(OctetList), - Sz = byte_size(Octets), - [encode_length(Sz), - octets_to_complete(Sz, Octets)]. - -e_object_identifier({'OBJECT IDENTIFIER',V}) -> - e_object_identifier(V); -e_object_identifier(V) when is_tuple(V) -> - e_object_identifier(tuple_to_list(V)); - -%% E1 = 0|1|2 and (E2 < 40 when E1 = 0|1) -e_object_identifier([E1,E2|Tail]) when E1 >= 0, E1 < 2, E2 < 40 ; E1==2 -> - Head = 40*E1 + E2, % weird - e_object_elements([Head|Tail],[]); -e_object_identifier(Oid=[_,_|_Tail]) -> - exit({error,{asn1,{'illegal_value',Oid}}}). - -e_object_elements([],Acc) -> - lists:reverse(Acc); -e_object_elements([H|T],Acc) -> - e_object_elements(T,[e_object_element(H)|Acc]). - -e_object_element(Num) when Num < 128 -> - [Num]; -e_object_element(Num) -> - [e_o_e(Num bsr 7)|[Num band 2#1111111]]. -e_o_e(Num) when Num < 128 -> - Num bor 2#10000000; -e_o_e(Num) -> - [e_o_e(Num bsr 7)|[(Num band 2#1111111) bor 2#10000000]]. - -%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% -%% encode_relative_oid(Val) -> CompleteList -%% encode_relative_oid({Name,Val}) -> CompleteList -encode_relative_oid(Val) when is_tuple(Val) -> - encode_relative_oid(tuple_to_list(Val)); -encode_relative_oid(Val) when is_list(Val) -> - Octets = list_to_binary([e_object_element(X)||X <- Val]), - Sz = byte_size(Octets), - [encode_length(Sz)|octets_to_complete(Sz, Octets)]. - %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% %% complete(InList) -> ByteList %% Takes a coded list with bits and bytes and converts it to a list of bytes %% Should be applied as the last step at encode of a complete ASN.1 type %% -complete(L) -> - case asn1rt_nif:encode_per_complete(L) of +complete(L0) -> + L = complete(L0, []), + case list_to_bitstring(L) of <<>> -> <<0>>; Bin -> Bin end. -octets_to_complete(Len,Val) when Len < 256 -> - [20,Len,Val]; -octets_to_complete(Len,Val) -> - [21,<<Len:16>>,Val]. - -octets_unused_to_complete(Unused,Len,Val) when Len < 256 -> - [30,Unused,Len,Val]; -octets_unused_to_complete(Unused,Len,Val) -> - [31,Unused,<<Len:16>>,Val]. +complete([], []) -> + []; +complete([], [H|More]) -> + complete(H, More); +complete([align|T], More) -> + complete(T, More); +complete([[]|T], More) -> + complete(T, More); +complete([[_|_]=H], More) -> + complete(H, More); +complete([[_|_]=H|T], More) -> + complete(H, [T|More]); +complete([H|T], More) when is_integer(H); is_binary(H) -> + [H|complete(T, More)]; +complete([H|T], More) -> + [H|complete(T, bit_size(H), More)]; +complete(Bin, More) when is_binary(Bin) -> + [Bin|complete([], More)]; +complete(Bin, More) -> + [Bin|complete([], bit_size(Bin), More)]. + +complete([], Bits, []) -> + case Bits band 7 of + 0 -> []; + N -> [<<0:(8-N)>>] + end; +complete([], Bits, [H|More]) -> + complete(H, Bits, More); +complete([align|T], Bits, More) -> + case Bits band 7 of + 0 -> complete(T, More); + 1 -> [<<0:7>>|complete(T, More)]; + 2 -> [<<0:6>>|complete(T, More)]; + 3 -> [<<0:5>>|complete(T, More)]; + 4 -> [<<0:4>>|complete(T, More)]; + 5 -> [<<0:3>>|complete(T, More)]; + 6 -> [<<0:2>>|complete(T, More)]; + 7 -> [<<0:1>>|complete(T, More)] + end; +complete([[]|T], Bits, More) -> + complete(T, Bits, More); +complete([[_|_]=H], Bits, More) -> + complete(H, Bits, More); +complete([[_|_]=H|T], Bits, More) -> + complete(H, Bits, [T|More]); +complete([H|T], Bits, More) when is_integer(H); + is_binary(H) -> + [H|complete(T, Bits, More)]; +complete([H|T], Bits, More) -> + [H|complete(T, Bits+bit_size(H), More)]; +complete(Bin, Bits, More) when is_binary(Bin) -> + [Bin|complete([], Bits, More)]; +complete(Bin, Bits, More) -> + [Bin|complete([], Bits+bit_size(Bin), More)]. |