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Diffstat (limited to 'lib/dialyzer/test/r9c_tests_SUITE_data/src/asn1/asn1rt_ber_bin.erl')
| -rw-r--r-- | lib/dialyzer/test/r9c_tests_SUITE_data/src/asn1/asn1rt_ber_bin.erl | 2310 |
1 files changed, 0 insertions, 2310 deletions
diff --git a/lib/dialyzer/test/r9c_tests_SUITE_data/src/asn1/asn1rt_ber_bin.erl b/lib/dialyzer/test/r9c_tests_SUITE_data/src/asn1/asn1rt_ber_bin.erl deleted file mode 100644 index 4f4574513e..0000000000 --- a/lib/dialyzer/test/r9c_tests_SUITE_data/src/asn1/asn1rt_ber_bin.erl +++ /dev/null @@ -1,2310 +0,0 @@ -%% ``The contents of this file are subject to the Erlang Public License, -%% Version 1.1, (the "License"); you may not use this file except in -%% compliance with the License. You should have received a copy of the -%% Erlang Public License along with this software. If not, it can be -%% retrieved via the world wide web at http://www.erlang.org/. -%% -%% 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 Initial Developer of the Original Code is Ericsson Utvecklings AB. -%% Portions created by Ericsson are Copyright 1999, Ericsson Utvecklings -%% AB. All Rights Reserved.'' -%% -%% $Id: asn1rt_ber_bin.erl,v 1.1 2008/12/17 09:53:30 mikpe Exp $ -%% --module(asn1rt_ber_bin). - -%% encoding / decoding of BER - --export([decode/1]). --export([fixoptionals/2,split_list/2,cindex/3,restbytes2/3, - list_to_record/2, - encode_tag_val/1,decode_tag/1,peek_tag/1, - check_tags/3, encode_tags/3]). --export([encode_boolean/2,decode_boolean/3, - encode_integer/3,encode_integer/4, - decode_integer/4,decode_integer/5,encode_enumerated/2, - encode_enumerated/4,decode_enumerated/5, - encode_real/2,decode_real/4, - encode_bit_string/4,decode_bit_string/6, - decode_compact_bit_string/6, - encode_octet_string/3,decode_octet_string/5, - encode_null/2,decode_null/3, - encode_object_identifier/2,decode_object_identifier/3, - encode_restricted_string/4,decode_restricted_string/6, - encode_universal_string/3,decode_universal_string/5, - encode_BMP_string/3,decode_BMP_string/5, - encode_generalized_time/3,decode_generalized_time/5, - encode_utc_time/3,decode_utc_time/5, - encode_length/1,decode_length/1, - check_if_valid_tag/3, - decode_tag_and_length/1, decode_components/6, - decode_components/7, decode_set/6]). - --export([encode_open_type/1,encode_open_type/2,decode_open_type/1,decode_open_type/2,decode_open_type/3]). --export([skipvalue/1, skipvalue/2]). - --include("asn1_records.hrl"). - -% the encoding of class of tag bits 8 and 7 --define(UNIVERSAL, 0). --define(APPLICATION, 16#40). --define(CONTEXT, 16#80). --define(PRIVATE, 16#C0). - -%%% primitive or constructed encoding % bit 6 --define(PRIMITIVE, 0). --define(CONSTRUCTED, 2#00100000). - -%%% The tag-number for universal types --define(N_BOOLEAN, 1). --define(N_INTEGER, 2). --define(N_BIT_STRING, 3). --define(N_OCTET_STRING, 4). --define(N_NULL, 5). --define(N_OBJECT_IDENTIFIER, 6). --define(N_OBJECT_DESCRIPTOR, 7). --define(N_EXTERNAL, 8). --define(N_REAL, 9). --define(N_ENUMERATED, 10). --define(N_EMBEDDED_PDV, 11). --define(N_SEQUENCE, 16). --define(N_SET, 17). --define(N_NumericString, 18). --define(N_PrintableString, 19). --define(N_TeletexString, 20). --define(N_VideotexString, 21). --define(N_IA5String, 22). --define(N_UTCTime, 23). --define(N_GeneralizedTime, 24). --define(N_GraphicString, 25). --define(N_VisibleString, 26). --define(N_GeneralString, 27). --define(N_UniversalString, 28). --define(N_BMPString, 30). - - -% the complete tag-word of built-in types --define(T_BOOLEAN, ?UNIVERSAL bor ?PRIMITIVE bor 1). --define(T_INTEGER, ?UNIVERSAL bor ?PRIMITIVE bor 2). --define(T_BIT_STRING, ?UNIVERSAL bor ?PRIMITIVE bor 3). % can be CONSTRUCTED --define(T_OCTET_STRING, ?UNIVERSAL bor ?PRIMITIVE bor 4). % can be CONSTRUCTED --define(T_NULL, ?UNIVERSAL bor ?PRIMITIVE bor 5). --define(T_OBJECT_IDENTIFIER,?UNIVERSAL bor ?PRIMITIVE bor 6). --define(T_OBJECT_DESCRIPTOR,?UNIVERSAL bor ?PRIMITIVE bor 7). --define(T_EXTERNAL, ?UNIVERSAL bor ?PRIMITIVE bor 8). --define(T_REAL, ?UNIVERSAL bor ?PRIMITIVE bor 9). --define(T_ENUMERATED, ?UNIVERSAL bor ?PRIMITIVE bor 10). --define(T_EMBEDDED_PDV, ?UNIVERSAL bor ?PRIMITIVE bor 11). --define(T_SEQUENCE, ?UNIVERSAL bor ?CONSTRUCTED bor 16). --define(T_SET, ?UNIVERSAL bor ?CONSTRUCTED bor 17). --define(T_NumericString, ?UNIVERSAL bor ?PRIMITIVE bor 18). %can be constructed --define(T_PrintableString, ?UNIVERSAL bor ?PRIMITIVE bor 19). %can be constructed --define(T_TeletexString, ?UNIVERSAL bor ?PRIMITIVE bor 20). %can be constructed --define(T_VideotexString, ?UNIVERSAL bor ?PRIMITIVE bor 21). %can be constructed --define(T_IA5String, ?UNIVERSAL bor ?PRIMITIVE bor 22). %can be constructed --define(T_UTCTime, ?UNIVERSAL bor ?PRIMITIVE bor 23). --define(T_GeneralizedTime, ?UNIVERSAL bor ?PRIMITIVE bor 24). --define(T_GraphicString, ?UNIVERSAL bor ?PRIMITIVE bor 25). %can be constructed --define(T_VisibleString, ?UNIVERSAL bor ?PRIMITIVE bor 26). %can be constructed --define(T_GeneralString, ?UNIVERSAL bor ?PRIMITIVE bor 27). %can be constructed --define(T_UniversalString, ?UNIVERSAL bor ?PRIMITIVE bor 28). %can be constructed --define(T_BMPString, ?UNIVERSAL bor ?PRIMITIVE bor 30). %can be constructed - - -decode(Bin) -> - decode_primitive(Bin). - -decode_primitive(Bin) -> - {Tlv = {Tag,Len,V},<<>>} = decode_tlv(Bin), - case element(2,Tag) of - ?CONSTRUCTED -> - {Tag,Len,decode_constructed(V)}; - _ -> - Tlv - end. - -decode_constructed(<<>>) -> - []; -decode_constructed(Bin) -> - {Tlv = {Tag,Len,V},Rest} = decode_tlv(Bin), - NewTlv = - case element(2,Tag) of - ?CONSTRUCTED -> - {Tag,Len,decode_constructed(V)}; - _ -> - Tlv - end, - [NewTlv|decode_constructed(Rest)]. - -decode_tlv(Bin) -> - {Tag,Bin1,_Rb1} = decode_tag(Bin), - {{Len,Bin2},_Rb2} = decode_length(Bin1), - <<V:Len/binary,Bin3/binary>> = Bin2, - {{Tag,Len,V},Bin3}. - - - -%%%%%%%%%%%%% -% split_list(List,HeadLen) -> {HeadList,TailList} -% -% splits List into HeadList (Length=HeadLen) and TailList -% if HeadLen == indefinite -> return {List,indefinite} -split_list(List,indefinite) -> - {List, indefinite}; -split_list(Bin, Len) when binary(Bin) -> - split_binary(Bin,Len); -split_list(List,Len) -> - {lists:sublist(List,Len),lists:nthtail(Len,List)}. - - -%%% new function which fixes a bug regarding indefinite length decoding -restbytes2(indefinite,<<0,0,RemBytes/binary>>,_) -> - {RemBytes,2}; -restbytes2(indefinite,RemBytes,ext) -> - skipvalue(indefinite,RemBytes); -restbytes2(RemBytes,<<>>,_) -> - {RemBytes,0}; -restbytes2(_RemBytes,Bytes,noext) -> - exit({error,{asn1, {unexpected,Bytes}}}); -restbytes2(RemBytes,_Bytes,ext) -> - {RemBytes,0}. - - - -%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% -%% skipvalue(Length, Bytes) -> {RemainingBytes, RemovedNumberOfBytes} -%% -%% skips the one complete (could be nested) TLV from Bytes -%% handles both definite and indefinite length encodings -%% - -skipvalue(L, Bytes) -> - skipvalue(L, Bytes, 0). - -skipvalue(indefinite, Bytes, Rb) -> - {_T,Bytes2,R2} = decode_tag(Bytes), - {{L,Bytes3},R3} = decode_length(Bytes2), - {Bytes4,Rb4} = case L of - indefinite -> - skipvalue(indefinite,Bytes3,R2+R3); - _ -> - <<_:L/binary, RestBytes/binary>> = Bytes3, - {RestBytes, R2+R3+L} - end, - case Bytes4 of - <<0,0,Bytes5/binary>> -> - {Bytes5,Rb+Rb4+2}; - _ -> skipvalue(indefinite,Bytes4,Rb+Rb4) - end; -skipvalue(L, Bytes, Rb) -> -% <<Skip:L/binary, RestBytes/binary>> = Bytes, - <<_:L/binary, RestBytes/binary>> = Bytes, - {RestBytes,Rb+L}. - -%%skipvalue(indefinite, Bytes, Rb) -> -%% {T,Bytes2,R2} = decode_tag(Bytes), -%% {L,Bytes3,R3} = decode_length(Bytes2), -%% {Bytes4,Rb4} = case L of -%% indefinite -> -%% skipvalue(indefinite,Bytes3,R2+R3); -%% _ -> -%% lists:nthtail(L,Bytes3) %% konstigt !? -%% end, -%% case Bytes4 of -%% [0,0|Bytes5] -> -%% {Bytes5,Rb4+2}; -%% _ -> skipvalue(indefinite,Bytes4,Rb4) -%% end; -%%skipvalue(L, Bytes, Rb) -> -%% {lists:nthtail(L,Bytes),Rb+L}. - -skipvalue(Bytes) -> - {_T,Bytes2,R2} = decode_tag(Bytes), - {{L,Bytes3},R3} = decode_length(Bytes2), - skipvalue(L,Bytes3,R2+R3). - - -cindex(Ix,Val,Cname) -> - case element(Ix,Val) of - {Cname,Val2} -> Val2; - X -> X - end. - -%%=============================================================================== -%%=============================================================================== -%%=============================================================================== -%% Optionals, preset not filled optionals with asn1_NOVALUE -%%=============================================================================== -%%=============================================================================== -%%=============================================================================== - -% converts a list to a record if necessary -list_to_record(Name,List) when list(List) -> - list_to_tuple([Name|List]); -list_to_record(_Name,Tuple) when tuple(Tuple) -> - Tuple. - - -fixoptionals(OptList,Val) when list(Val) -> - fixoptionals(OptList,Val,1,[],[]). - -fixoptionals([{Name,Pos}|Ot],[{Name,Val}|Vt],_Opt,Acc1,Acc2) -> - fixoptionals(Ot,Vt,Pos+1,[1|Acc1],[{Name,Val}|Acc2]); -fixoptionals([{_Name,Pos}|Ot],V,Pos,Acc1,Acc2) -> - fixoptionals(Ot,V,Pos+1,[0|Acc1],[asn1_NOVALUE|Acc2]); -fixoptionals(O,[Vh|Vt],Pos,Acc1,Acc2) -> - fixoptionals(O,Vt,Pos+1,Acc1,[Vh|Acc2]); -fixoptionals([],[Vh|Vt],Pos,Acc1,Acc2) -> - fixoptionals([],Vt,Pos+1,Acc1,[Vh|Acc2]); -fixoptionals([],[],_,_Acc1,Acc2) -> - % return Val as a record - list_to_tuple([asn1_RECORDNAME|lists:reverse(Acc2)]). - - -%%encode_tag(TagClass(?UNI, APP etc), Form (?PRIM etx), TagInteger) -> -%% 8bit Int | binary -encode_tag_val({Class, Form, TagNo}) when (TagNo =< 30) -> - <<(Class bsr 6):2,(Form bsr 5):1,TagNo:5>>; - -encode_tag_val({Class, Form, TagNo}) -> - {Octets,_Len} = mk_object_val(TagNo), - BinOct = list_to_binary(Octets), - <<(Class bsr 6):2, (Form bsr 5):1, 31:5,BinOct/binary>>; - -%% asumes whole correct tag bitpattern, multiple of 8 -encode_tag_val(Tag) when (Tag =< 255) -> Tag; %% anv�nds denna funktion??!! -%% asumes correct bitpattern of 0-5 -encode_tag_val(Tag) -> encode_tag_val2(Tag,[]). - -encode_tag_val2(Tag, OctAck) when (Tag =< 255) -> - [Tag | OctAck]; -encode_tag_val2(Tag, OctAck) -> - encode_tag_val2(Tag bsr 8, [255 band Tag | OctAck]). - - -%%%encode_tag(TagClass(?UNI, APP etc), Form (?PRIM etx), TagInteger) -> -%%% 8bit Int | [list of octets] -%encode_tag_val({Class, Form, TagNo}) when (TagNo =< 30) -> -%%% <<Class:2,Form:1,TagNo:5>>; -% [Class bor Form bor TagNo]; -%encode_tag_val({Class, Form, TagNo}) -> -% {Octets,L} = mk_object_val(TagNo), -% [Class bor Form bor 31 | Octets]; - - -%%============================================================================\%% Peek on the initial tag -%% peek_tag(Bytes) -> TagBytes -%% interprets the first byte and possible second, third and fourth byte as -%% a tag and returns all the bytes comprising the tag, the constructed/primitive bit (6:th bit of first byte) is normalised to 0 -%% - -peek_tag(<<B7_6:2,_:1,31:5,Buffer/binary>>) -> - Bin = peek_tag(Buffer, <<>>), - <<B7_6:2,31:6,Bin/binary>>; -%% single tag (tagno < 31) -peek_tag(<<B7_6:2,_:1,B4_0:5,_Buffer/binary>>) -> - <<B7_6:2,B4_0:6>>. - -peek_tag(<<0:1,PartialTag:7,_Buffer/binary>>, TagAck) -> - <<TagAck/binary,PartialTag>>; -peek_tag(<<PartialTag,Buffer/binary>>, TagAck) -> - peek_tag(Buffer,<<TagAck/binary,PartialTag>>); -peek_tag(_,TagAck) -> - exit({error,{asn1, {invalid_tag,TagAck}}}). -%%peek_tag([Tag|Buffer]) when (Tag band 31) == 31 -> -%% [Tag band 2#11011111 | peek_tag(Buffer,[])]; -%%%% single tag (tagno < 31) -%%peek_tag([Tag|Buffer]) -> -%% [Tag band 2#11011111]. - -%%peek_tag([PartialTag|Buffer], TagAck) when (PartialTag < 128 ) -> -%% lists:reverse([PartialTag|TagAck]); -%%peek_tag([PartialTag|Buffer], TagAck) -> -%% peek_tag(Buffer,[PartialTag|TagAck]); -%%peek_tag(Buffer,TagAck) -> -%% exit({error,{asn1, {invalid_tag,lists:reverse(TagAck)}}}). - - -%%=============================================================================== -%% Decode a tag -%% -%% decode_tag(OctetListBuffer) -> {{Class, Form, TagNo}, RestOfBuffer, RemovedBytes} -%%=============================================================================== - -%% multiple octet tag -decode_tag(<<Class:2, Form:1, 31:5, Buffer/binary>>) -> - {TagNo, Buffer1, RemovedBytes} = decode_tag(Buffer, 0, 1), - {{(Class bsl 6), (Form bsl 5), TagNo}, Buffer1, RemovedBytes}; - -%% single tag (< 31 tags) -decode_tag(<<Class:2,Form:1,TagNo:5, Buffer/binary>>) -> - {{(Class bsl 6), (Form bsl 5), TagNo}, Buffer, 1}. - -%% last partial tag -decode_tag(<<0:1,PartialTag:7, Buffer/binary>>, TagAck, RemovedBytes) -> - TagNo = (TagAck bsl 7) bor PartialTag, - %%<<TagNo>> = <<TagAck:1, PartialTag:7>>, - {TagNo, Buffer, RemovedBytes+1}; -% more tags -decode_tag(<<_:1,PartialTag:7, Buffer/binary>>, TagAck, RemovedBytes) -> - TagAck1 = (TagAck bsl 7) bor PartialTag, - %%<<TagAck1:16>> = <<TagAck:1, PartialTag:7,0:8>>, - decode_tag(Buffer, TagAck1, RemovedBytes+1). - -%%------------------------------------------------------------------ -%% check_tags_i is the same as check_tags except that it stops and -%% returns the remaining tags not checked when it encounters an -%% indefinite length field -%% only called internally within this module - -check_tags_i([Tag], Buffer, OptOrMand) -> % optimized very usual case - {[],check_one_tag(Tag, Buffer, OptOrMand)}; -check_tags_i(Tags, Buffer, OptOrMand) -> - check_tags_i(Tags, Buffer, 0, OptOrMand). - -check_tags_i([Tag1,Tag2|TagRest], Buffer, Rb, OptOrMand) - when Tag1#tag.type == 'IMPLICIT' -> - check_tags_i([Tag1#tag{type=Tag2#tag.type}|TagRest], Buffer, Rb, OptOrMand); - -check_tags_i([Tag1|TagRest], Buffer, Rb, OptOrMand) -> - {Form_Length,Buffer2,Rb1} = check_one_tag(Tag1, Buffer, OptOrMand), - case TagRest of - [] -> {TagRest, {Form_Length, Buffer2, Rb + Rb1}}; - _ -> - case Form_Length of - {?CONSTRUCTED,_} -> - {TagRest, {Form_Length, Buffer2, Rb + Rb1}}; - _ -> - check_tags_i(TagRest, Buffer2, Rb + Rb1, mandatory) - end - end; - -check_tags_i([], Buffer, Rb, _) -> - {[],{{0,0},Buffer,Rb}}. - -%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% -%% This function is called from generated code - -check_tags([Tag], Buffer, OptOrMand) -> % optimized very usual case - check_one_tag(Tag, Buffer, OptOrMand); -check_tags(Tags, Buffer, OptOrMand) -> - check_tags(Tags, Buffer, 0, OptOrMand). - -check_tags([Tag1,Tag2|TagRest], Buffer, Rb, OptOrMand) - when Tag1#tag.type == 'IMPLICIT' -> - check_tags([Tag1#tag{type=Tag2#tag.type}|TagRest], Buffer, Rb, OptOrMand); - -check_tags([Tag1|TagRest], Buffer, Rb, OptOrMand) -> - {Form_Length,Buffer2,Rb1} = check_one_tag(Tag1, Buffer, OptOrMand), - case TagRest of - [] -> {Form_Length, Buffer2, Rb + Rb1}; - _ -> check_tags(TagRest, Buffer2, Rb + Rb1, mandatory) - end; - -check_tags([], Buffer, Rb, _) -> - {{0,0},Buffer,Rb}. - -check_one_tag(Tag=#tag{class=ExpectedClass,number=ExpectedNumber}, Buffer, OptOrMand) -> - case catch decode_tag(Buffer) of - {'EXIT',_Reason} -> - tag_error(no_data,Tag,Buffer,OptOrMand); - {{ExpectedClass,Form,ExpectedNumber},Buffer2,Rb} -> - {{L,Buffer3},RemBytes2} = decode_length(Buffer2), - {{Form,L}, Buffer3, RemBytes2+Rb}; - {ErrorTag,_,_} -> - tag_error(ErrorTag, Tag, Buffer, OptOrMand) - end. - -tag_error(ErrorTag, Tag, Buffer, OptOrMand) -> - case OptOrMand of - mandatory -> - exit({error,{asn1, {invalid_tag, - {ErrorTag, Tag, Buffer}}}}); - _ -> - exit({error,{asn1, {no_optional_tag, - {ErrorTag, Tag, Buffer}}}}) - end. -%%======================================================================= -%% -%% Encode all tags in the list Tags and return a possibly deep list of -%% bytes with tag and length encoded -%% -%% prepend_tags(Tags, BytesSoFar, LenSoFar) -> {Bytes, Len} -encode_tags(Tags, BytesSoFar, LenSoFar) -> - NewTags = encode_tags1(Tags, []), - %% NewTags contains the resulting tags in reverse order - encode_tags2(NewTags, BytesSoFar, LenSoFar). - -%encode_tags2([#tag{class=?UNIVERSAL,number=No}|Trest], BytesSoFar, LenSoFar) -> -% {Bytes2,L2} = encode_length(LenSoFar), -% encode_tags2(Trest,[[No|Bytes2],BytesSoFar], LenSoFar + 1 + L2); -encode_tags2([Tag|Trest], BytesSoFar, LenSoFar) -> - {Bytes1,L1} = encode_one_tag(Tag), - {Bytes2,L2} = encode_length(LenSoFar), - encode_tags2(Trest, [Bytes1,Bytes2|BytesSoFar], - LenSoFar + L1 + L2); -encode_tags2([], BytesSoFar, LenSoFar) -> - {BytesSoFar,LenSoFar}. - -encode_tags1([Tag1, Tag2| Trest], Acc) - when Tag1#tag.type == 'IMPLICIT' -> - encode_tags1([Tag1#tag{type=Tag2#tag.type,form=Tag2#tag.form}|Trest],Acc); -encode_tags1([Tag1 | Trest], Acc) -> - encode_tags1(Trest, [Tag1|Acc]); -encode_tags1([], Acc) -> - Acc. % the resulting tags are returned in reverse order - -encode_one_tag(Bin) when binary(Bin) -> - {Bin,size(Bin)}; -encode_one_tag(#tag{class=Class,number=No,type=Type, form = Form}) -> - NewForm = case Type of - 'EXPLICIT' -> - ?CONSTRUCTED; - _ -> - Form - end, - Bytes = encode_tag_val({Class,NewForm,No}), - {Bytes,size(Bytes)}. - -%%=============================================================================== -%% Change the tag (used when an implicit tagged type has a reference to something else) -%% The constructed bit in the tag is taken from the tag to be replaced. -%% -%% change_tag(NewTag,[Tag,Buffer]) -> [NewTag,Buffer] -%%=============================================================================== - -%change_tag({NewClass,NewTagNr}, Buffer) -> -% {{OldClass, OldForm, OldTagNo}, Buffer1, RemovedBytes} = decode_tag(lists:flatten(Buffer)), -% [encode_tag_val({NewClass, OldForm, NewTagNr}) | Buffer1]. - - - - - - - -%%=============================================================================== -%% -%% This comment is valid for all the encode/decode functions -%% -%% C = Constraint -> typically {'ValueRange',LowerBound,UpperBound} -%% used for PER-coding but not for BER-coding. -%% -%% Val = Value. If Val is an atom then it is a symbolic integer value -%% (i.e the atom must be one of the names in the NamedNumberList). -%% The NamedNumberList is used to translate the atom to an integer value -%% before encoding. -%% -%%=============================================================================== - -%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% -%% encode_open_type(Value) -> CompleteList -%% Value = list of bytes of an already encoded value (the list must be flat) -%% | binary - -%% This version does not consider Explicit tagging of the open type. It -%% is only left because of backward compatibility. -encode_open_type(Val) when list(Val) -> - {Val,size(list_to_binary(Val))}; -encode_open_type(Val) -> - {Val, size(Val)}. - -%% -encode_open_type(Val, []) when list(Val) -> - {Val,size(list_to_binary(Val))}; -encode_open_type(Val,[]) -> - {Val, size(Val)}; -encode_open_type(Val, Tag) when list(Val) -> - encode_tags(Tag,Val,size(list_to_binary(Val))); -encode_open_type(Val,Tag) -> - encode_tags(Tag,Val, size(Val)). - - - -%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% -%% decode_open_type(Buffer) -> Value -%% Bytes = [byte] with BER encoded data -%% Value = [byte] with decoded data (which must be decoded again as some type) -%% -decode_open_type(Bytes) -> - {_Tag, Len, _RemainingBuffer, RemovedBytes} = decode_tag_and_length(Bytes), - N = Len + RemovedBytes, - <<Val:N/binary, RemainingBytes/binary>> = Bytes, - {Val, RemainingBytes, Len + RemovedBytes}. - -decode_open_type(Bytes,ExplTag) -> - {Tag, Len, RemainingBuffer, RemovedBytes} = decode_tag_and_length(Bytes), - case {Tag,ExplTag} of - {{Class,Form,No},[#tag{class=Class,number=No,form=Form}]} -> - {_Tag2, Len2, _RemainingBuffer2, RemovedBytes2} = decode_tag_and_length(RemainingBuffer), - N = Len2 + RemovedBytes2, - <<_:RemovedBytes/unit:8,Val:N/binary,RemainingBytes/binary>> = Bytes, - {Val, RemainingBytes, N + RemovedBytes}; - _ -> - N = Len + RemovedBytes, - <<Val:N/binary, RemainingBytes/binary>> = Bytes, - {Val, RemainingBytes, Len + RemovedBytes} - end. - -decode_open_type(ber_bin,Bytes,ExplTag) -> - decode_open_type(Bytes,ExplTag); -decode_open_type(ber,Bytes,ExplTag) -> - {Val,RemBytes,Len}=decode_open_type(Bytes,ExplTag), - {binary_to_list(Val),RemBytes,Len}. - -%%=============================================================================== -%%=============================================================================== -%%=============================================================================== -%% Boolean, ITU_T X.690 Chapter 8.2 -%%=============================================================================== -%%=============================================================================== -%%=============================================================================== - -%%=============================================================================== -%% encode_boolean(Integer, tag | notag) -> [octet list] -%%=============================================================================== - -encode_boolean({Name, Val}, DoTag) when atom(Name) -> - dotag(DoTag, ?N_BOOLEAN, encode_boolean(Val)); -encode_boolean(true,[]) -> - {[1,1,16#FF],3}; -encode_boolean(false,[]) -> - {[1,1,0],3}; -encode_boolean(Val, DoTag) -> - dotag(DoTag, ?N_BOOLEAN, encode_boolean(Val)). - -%% encode_boolean(Boolean) -> [Len, Boolean] = [1, $FF | 0] -encode_boolean(true) -> {[16#FF],1}; -encode_boolean(false) -> {[0],1}; -encode_boolean(X) -> exit({error,{asn1, {encode_boolean, X}}}). - - -%%=============================================================================== -%% decode_boolean(BuffList, HasTag, TotalLen) -> {true, Remain, RemovedBytes} | -%% {false, Remain, RemovedBytes} -%%=============================================================================== - -decode_boolean(Buffer, Tags, OptOrMand) -> - NewTags = new_tags(Tags,#tag{class=?UNIVERSAL,number=?N_BOOLEAN}), - decode_boolean_notag(Buffer, NewTags, OptOrMand). - -decode_boolean_notag(Buffer, Tags, OptOrMand) -> - {RestTags, {FormLen,Buffer0,Rb0}} = - check_tags_i(Tags, Buffer, OptOrMand), - case FormLen of - {?CONSTRUCTED,Len} -> - {Buffer00,RestBytes} = split_list(Buffer0,Len), - {Val,Buffer1,Rb1} = decode_boolean_notag(Buffer00, RestTags, OptOrMand), - {Buffer2, Rb2} = restbytes2(RestBytes,Buffer1,noext), - {Val, Buffer2, Rb0+Rb1+Rb2}; - {_,_} -> - decode_boolean2(Buffer0, Rb0) - end. - -decode_boolean2(<<0:8, Buffer/binary>>, RemovedBytes) -> - {false, Buffer, RemovedBytes + 1}; -decode_boolean2(<<_:8, Buffer/binary>>, RemovedBytes) -> - {true, Buffer, RemovedBytes + 1}; -decode_boolean2(Buffer, _) -> - exit({error,{asn1, {decode_boolean, Buffer}}}). - - - - -%%=========================================================================== -%% Integer, ITU_T X.690 Chapter 8.3 - -%% encode_integer(Constraint, Value, Tag) -> [octet list] -%% encode_integer(Constraint, Name, NamedNumberList, Tag) -> [octet list] -%% Value = INTEGER | {Name,INTEGER} -%% Tag = tag | notag -%%=========================================================================== - -encode_integer(C, Val, []) when integer(Val) -> - {EncVal,Len}=encode_integer(C, Val), - dotag_universal(?N_INTEGER,EncVal,Len); -encode_integer(C, Val, Tag) when integer(Val) -> - dotag(Tag, ?N_INTEGER, encode_integer(C, Val)); -encode_integer(C,{Name,Val},Tag) when atom(Name) -> - encode_integer(C,Val,Tag); -encode_integer(_, Val, _) -> - exit({error,{asn1, {encode_integer, Val}}}). - - - -encode_integer(C, Val, NamedNumberList, Tag) when atom(Val) -> - case lists:keysearch(Val, 1, NamedNumberList) of - {value,{_, NewVal}} -> - dotag(Tag, ?N_INTEGER, encode_integer(C, NewVal)); - _ -> - exit({error,{asn1, {encode_integer_namednumber, Val}}}) - end; -encode_integer(C,{_,Val},NamedNumberList,Tag) -> - encode_integer(C,Val,NamedNumberList,Tag); -encode_integer(C, Val, _NamedNumberList, Tag) -> - dotag(Tag, ?N_INTEGER, encode_integer(C, Val)). - - - - -encode_integer(_C, Val) -> - Bytes = - if - Val >= 0 -> - encode_integer_pos(Val, []); - true -> - encode_integer_neg(Val, []) - end, - {Bytes,length(Bytes)}. - -encode_integer_pos(0, L=[B|_Acc]) when B < 128 -> - L; -encode_integer_pos(N, Acc) -> - encode_integer_pos((N bsr 8), [N band 16#ff| Acc]). - -encode_integer_neg(-1, L=[B1|_T]) when B1 > 127 -> - L; -encode_integer_neg(N, Acc) -> - encode_integer_neg(N bsr 8, [N band 16#ff|Acc]). - -%%=============================================================================== -%% decode integer -%% (Buffer, Range, HasTag, TotalLen) -> {Integer, Remain, RemovedBytes} -%% (Buffer, Range, NamedNumberList, HasTag, TotalLen) -> {Integer, Remain, RemovedBytes} -%%=============================================================================== - - -decode_integer(Buffer, Range, Tags, OptOrMand) -> - NewTags = new_tags(Tags,#tag{class=?UNIVERSAL,number=?N_INTEGER}), - decode_integer_notag(Buffer, Range, [], NewTags, OptOrMand). - -decode_integer(Buffer, Range, NamedNumberList, Tags, OptOrMand) -> - NewTags = new_tags(Tags,#tag{class=?UNIVERSAL,number=?N_INTEGER}), - decode_integer_notag(Buffer, Range, NamedNumberList, NewTags, OptOrMand). - -decode_integer_notag(Buffer, Range, NamedNumberList, NewTags, OptOrMand) -> - {RestTags, {FormLen, Buffer0, Rb0}} = - check_tags_i(NewTags, Buffer, OptOrMand), -% Result = {Val, Buffer2, RemovedBytes} = - case FormLen of - {?CONSTRUCTED,Len} -> - {Buffer00, RestBytes} = split_list(Buffer0,Len), - {Val01, Buffer01, Rb01} = - decode_integer_notag(Buffer00, Range, NamedNumberList, - RestTags, OptOrMand), - {Buffer02, Rb02} = restbytes2(RestBytes,Buffer01,noext), - {Val01, Buffer02, Rb0+Rb01+Rb02}; - {_, Len} -> - Result = - decode_integer2(Len,Buffer0,Rb0+Len), - Result2 = check_integer_constraint(Result,Range), - resolve_named_value(Result2,NamedNumberList) - end. - -resolve_named_value(Result={Val,Buffer,RemBytes},NamedNumberList) -> - case NamedNumberList of - [] -> Result; - _ -> - NewVal = case lists:keysearch(Val, 2, NamedNumberList) of - {value,{NamedVal, _}} -> - NamedVal; - _ -> - Val - end, - {NewVal, Buffer, RemBytes} - end. - -check_integer_constraint(Result={Val, _Buffer,_},Range) -> - case Range of - [] -> % No length constraint - Result; - {Lb,Ub} when Val >= Lb, Ub >= Val -> % variable length constraint - Result; - Val -> % fixed value constraint - Result; - {_,_} -> - exit({error,{asn1,{integer_range,Range,Val}}}); - SingleValue when integer(SingleValue) -> - exit({error,{asn1,{integer_range,Range,Val}}}); - _ -> % some strange constraint that we don't support yet - Result - end. - -%%============================================================================ -%% Enumerated value, ITU_T X.690 Chapter 8.4 - -%% encode enumerated value -%%============================================================================ -encode_enumerated(Val, []) when integer(Val)-> - {EncVal,Len} = encode_integer(false,Val), - dotag_universal(?N_ENUMERATED,EncVal,Len); -encode_enumerated(Val, DoTag) when integer(Val)-> - dotag(DoTag, ?N_ENUMERATED, encode_integer(false,Val)); -encode_enumerated({Name,Val}, DoTag) when atom(Name) -> - encode_enumerated(Val, DoTag). - -%% The encode_enumerated functions below this line can be removed when the -%% new code generation is stable. (the functions might have to be kept here -%% a while longer for compatibility reasons) - -encode_enumerated(C, Val, {NamedNumberList,ExtList}, DoTag) when atom(Val) -> - case catch encode_enumerated(C, Val, NamedNumberList, DoTag) of - {'EXIT',_} -> encode_enumerated(C, Val, ExtList, DoTag); - Result -> Result - end; - -encode_enumerated(C, Val, NamedNumberList, DoTag) when atom(Val) -> - case lists:keysearch(Val, 1, NamedNumberList) of - {value, {_, NewVal}} when DoTag == []-> - {EncVal,Len} = encode_integer(C,NewVal), - dotag_universal(?N_ENUMERATED,EncVal,Len); - {value, {_, NewVal}} -> - dotag(DoTag, ?N_ENUMERATED, encode_integer(C, NewVal)); - _ -> - exit({error,{asn1, {enumerated_not_in_range, Val}}}) - end; - -encode_enumerated(C, {asn1_enum, Val}, {_,_}, DoTag) when integer(Val) -> - dotag(DoTag, ?N_ENUMERATED, encode_integer(C,Val)); - -encode_enumerated(C, {Name,Val}, NamedNumberList, DoTag) when atom(Name) -> - encode_enumerated(C, Val, NamedNumberList, DoTag); - -encode_enumerated(_, Val, _, _) -> - exit({error,{asn1, {enumerated_not_namednumber, Val}}}). - - - -%%============================================================================ -%% decode enumerated value -%% (Buffer, Range, NamedNumberList, HasTag, TotalLen) -> -%% {Value, RemainingBuffer, RemovedBytes} -%%=========================================================================== -decode_enumerated(Buffer, Range, NamedNumberList, Tags, OptOrMand) -> - NewTags = new_tags(Tags,#tag{class=?UNIVERSAL,number=?N_ENUMERATED}), - decode_enumerated_notag(Buffer, Range, NamedNumberList, - NewTags, OptOrMand). - -decode_enumerated_notag(Buffer, Range, NNList = {NamedNumberList,ExtList}, Tags, OptOrMand) -> - {RestTags, {FormLen, Buffer0, Rb0}} = - check_tags_i(Tags, Buffer, OptOrMand), - - case FormLen of - {?CONSTRUCTED,Len} -> - {Buffer00,RestBytes} = split_list(Buffer0,Len), - {Val01, Buffer01, Rb01} = - decode_enumerated_notag(Buffer00, Range, NNList, RestTags, OptOrMand), - {Buffer02, Rb02} = restbytes2(RestBytes,Buffer01,noext), - {Val01, Buffer02, Rb0+Rb01+Rb02}; - {_,Len} -> - {Val01, Buffer01, Rb01} = - decode_integer2(Len, Buffer0, Rb0+Len), - case decode_enumerated1(Val01, NamedNumberList) of - {asn1_enum,Val01} -> - {decode_enumerated1(Val01,ExtList), Buffer01, Rb01}; - Result01 -> - {Result01, Buffer01, Rb01} - end - end; - -decode_enumerated_notag(Buffer, Range, NNList, Tags, OptOrMand) -> - {RestTags, {FormLen, Buffer0, Rb0}} = - check_tags_i(Tags, Buffer, OptOrMand), - - case FormLen of - {?CONSTRUCTED,Len} -> - {Buffer00,RestBytes} = split_list(Buffer0,Len), - {Val01, Buffer01, Rb01} = - decode_enumerated_notag(Buffer00, Range, NNList, RestTags, OptOrMand), - {Buffer02, Rb02} = restbytes2(RestBytes,Buffer01,noext), - {Val01, Buffer02, Rb0+Rb01+Rb02}; - {_,Len} -> - {Val01, Buffer02, Rb02} = - decode_integer2(Len, Buffer0, Rb0+Len), - case decode_enumerated1(Val01, NNList) of - {asn1_enum,_} -> - exit({error,{asn1, {illegal_enumerated, Val01}}}); - Result01 -> - {Result01, Buffer02, Rb02} - end - end. - -decode_enumerated1(Val, NamedNumberList) -> - %% it must be a named integer - case lists:keysearch(Val, 2, NamedNumberList) of - {value,{NamedVal, _}} -> - NamedVal; - _ -> - {asn1_enum,Val} - end. - - -%%============================================================================ -%% -%% Real value, ITU_T X.690 Chapter 8.5 -%%============================================================================ -%% -%% encode real value -%%============================================================================ - -%% only base 2 internally so far!! -encode_real(0, DoTag) -> - dotag(DoTag, ?N_REAL, {[],0}); -encode_real('PLUS-INFINITY', DoTag) -> - dotag(DoTag, ?N_REAL, {[64],1}); -encode_real('MINUS-INFINITY', DoTag) -> - dotag(DoTag, ?N_REAL, {[65],1}); -encode_real(Val, DoTag) when tuple(Val)-> - dotag(DoTag, ?N_REAL, encode_real(Val)). - -%%%%%%%%%%%%%% -%% not optimal efficient.. -%% only base 2 of Mantissa encoding! -%% only base 2 of ExpBase encoding! -encode_real({Man, Base, Exp}) -> -%% io:format("Mantissa: ~w Base: ~w, Exp: ~w~n",[Man, Base, Exp]), - - OctExp = if Exp >= 0 -> list_to_binary(encode_integer_pos(Exp, [])); - true -> list_to_binary(encode_integer_neg(Exp, [])) - end, -%% ok = io:format("OctExp: ~w~n",[OctExp]), - SignBit = if Man > 0 -> 0; % bit 7 is pos or neg, no Zeroval - true -> 1 - end, -%% ok = io:format("SignBitMask: ~w~n",[SignBitMask]), - InBase = if Base =:= 2 -> 0; % bit 6,5: only base 2 this far! - true -> - exit({error,{asn1, {encode_real_non_supported_encodeing, Base}}}) - end, - SFactor = 0, % bit 4,3: no scaling since only base 2 - OctExpLen = size(OctExp), - if OctExpLen > 255 -> - exit({error,{asn1, {to_big_exp_in_encode_real, OctExpLen}}}); - true -> true %% make real assert later.. - end, - {LenCode, EOctets} = case OctExpLen of % bit 2,1 - 1 -> {0, OctExp}; - 2 -> {1, OctExp}; - 3 -> {2, OctExp}; - _ -> {3, <<OctExpLen, OctExp/binary>>} - end, - FirstOctet = <<1:1,SignBit:1,InBase:2,SFactor:2,LenCode:2>>, - OctMantissa = if Man > 0 -> list_to_binary(minimum_octets(Man)); - true -> list_to_binary(minimum_octets(-(Man))) % signbit keeps track of sign - end, - %% ok = io:format("LenMask: ~w EOctets: ~w~nFirstOctet: ~w OctMantissa: ~w OctExpLen: ~w~n", [LenMask, EOctets, FirstOctet, OctMantissa, OctExpLen]), - Bin = <<FirstOctet/binary, EOctets/binary, OctMantissa/binary>>, - {Bin, size(Bin)}. - - -%encode_real({Man, Base, Exp}) -> -%% io:format("Mantissa: ~w Base: ~w, Exp: ~w~n",[Man, Base, Exp]), - -% OctExp = if Exp >= 0 -> encode_integer_pos(Exp, []); -% true -> encode_integer_neg(Exp, []) -% end, -%% ok = io:format("OctExp: ~w~n",[OctExp]), -% SignBitMask = if Man > 0 -> 2#00000000; % bit 7 is pos or neg, no Zeroval -% true -> 2#01000000 -% end, -%% ok = io:format("SignBitMask: ~w~n",[SignBitMask]), -% InternalBaseMask = if Base =:= 2 -> 2#00000000; % bit 6,5: only base 2 this far! -% true -> -% exit({error,{asn1, {encode_real_non_supported_encodeing, Base}}}) -% end, -% ScalingFactorMask =2#00000000, % bit 4,3: no scaling since only base 2 -% OctExpLen = length(OctExp), -% if OctExpLen > 255 -> -% exit({error,{asn1, {to_big_exp_in_encode_real, OctExpLen}}}); -% true -> true %% make real assert later.. -% end, -% {LenMask, EOctets} = case OctExpLen of % bit 2,1 -% 1 -> {0, OctExp}; -% 2 -> {1, OctExp}; -% 3 -> {2, OctExp}; -% _ -> {3, [OctExpLen, OctExp]} -% end, -% FirstOctet = (SignBitMask bor InternalBaseMask bor -% ScalingFactorMask bor LenMask bor -% 2#10000000), % bit set for binary mantissa encoding! -% OctMantissa = if Man > 0 -> minimum_octets(Man); -% true -> minimum_octets(-(Man)) % signbit keeps track of sign -% end, -%% ok = io:format("LenMask: ~w EOctets: ~w~nFirstOctet: ~w OctMantissa: ~w OctExpLen: ~w~n", [LenMask, EOctets, FirstOctet, OctMantissa, OctExpLen]), -% {[FirstOctet, EOctets, OctMantissa], -% length(OctMantissa) + -% (if OctExpLen > 3 -> -% OctExpLen + 2; -% true -> -% OctExpLen + 1 -% end) -% }. - - -%%============================================================================ -%% decode real value -%% -%% decode_real([OctetBufferList], tuple|value, tag|notag) -> -%% {{Mantissa, Base, Exp} | realval | PLUS-INFINITY | MINUS-INFINITY | 0, -%% RestBuff} -%% -%% only for base 2 decoding sofar!! -%%============================================================================ - -decode_real(Buffer, Form, Tags, OptOrMand) -> - NewTags = new_tags(Tags,#tag{class=?UNIVERSAL,number=?N_REAL}), - decode_real_notag(Buffer, Form, NewTags, OptOrMand). - -decode_real_notag(Buffer, Form, Tags, OptOrMand) -> - {RestTags, {FormLen, Buffer0, Rb0}} = - check_tags_i(Tags, Buffer, OptOrMand), - - case FormLen of - {?CONSTRUCTED,Len} -> - {Buffer00,RestBytes} = split_list(Buffer0,Len), - {Val01, Buffer01, Rb01} = - decode_real_notag(Buffer00, Form, RestTags, OptOrMand), - {Buffer02, Rb02} = restbytes2(RestBytes,Buffer01,noext), - {Val01, Buffer02, Rb0+Rb01+Rb02}; - {_,Len} -> - decode_real2(Buffer0, Form, Len, Rb0) - end. - -decode_real2(Buffer0, Form, Len, RemBytes1) -> - <<First, Buffer2/binary>> = Buffer0, - if - First =:= 2#01000000 -> {'PLUS-INFINITY', Buffer2}; - First =:= 2#01000001 -> {'MINUS-INFINITY', Buffer2}; - First =:= 2#00000000 -> {0, Buffer2}; - true -> - %% have some check here to verify only supported bases (2) - <<_B7:1,B6:1,B5_4:2,B3_2:2,B1_0:2>> = <<First>>, - Sign = B6, - Base = - case B5_4 of - 0 -> 2; % base 2, only one so far - _ -> exit({error,{asn1, {non_supported_base, First}}}) - end, -% ScalingFactor = - case B3_2 of - 0 -> 0; % no scaling so far - _ -> exit({error,{asn1, {non_supported_scaling, First}}}) - end, - % ok = io:format("Buffer2: ~w~n",[Buffer2]), - {FirstLen, {Exp, Buffer3}, RemBytes2} = - case B1_0 of - 0 -> {2, decode_integer2(1, Buffer2, RemBytes1), RemBytes1+1}; - 1 -> {3, decode_integer2(2, Buffer2, RemBytes1), RemBytes1+2}; - 2 -> {4, decode_integer2(3, Buffer2, RemBytes1), RemBytes1+3}; - 3 -> - <<ExpLen1,RestBuffer/binary>> = Buffer2, - { ExpLen1 + 2, - decode_integer2(ExpLen1, RestBuffer, RemBytes1), - RemBytes1+ExpLen1} - end, - % io:format("FirstLen: ~w, Exp: ~w, Buffer3: ~w ~n", - % [FirstLen, Exp, Buffer3]), - Length = Len - FirstLen, - <<LongInt:Length/unit:8,RestBuff/binary>> = Buffer3, - {{Mantissa, Buffer4}, RemBytes3} = - if Sign =:= 0 -> - % io:format("sign plus~n"), - {{LongInt, RestBuff}, 1 + Length}; - true -> - % io:format("sign minus~n"), - {{-LongInt, RestBuff}, 1 + Length} - end, - % io:format("Form: ~w~n",[Form]), - case Form of - tuple -> - {Val,Buf,_RemB} = Exp, - {{Mantissa, Base, {Val,Buf}}, Buffer4, RemBytes2+RemBytes3}; - _value -> - comming - end - end. - - -%%============================================================================ -%% Bitstring value, ITU_T X.690 Chapter 8.6 -%% -%% encode bitstring value -%% -%% 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 constrint Len, only valid when identifiers -%%============================================================================ - -encode_bit_string(C,Bin={Unused,BinBits},NamedBitList,DoTag) when integer(Unused), binary(BinBits) -> - encode_bin_bit_string(C,Bin,NamedBitList,DoTag); -encode_bit_string(C, [FirstVal | RestVal], NamedBitList, DoTag) when atom(FirstVal) -> - encode_bit_string_named(C, [FirstVal | RestVal], NamedBitList, DoTag); - -encode_bit_string(C, [{bit,X} | RestVal], NamedBitList, DoTag) -> - encode_bit_string_named(C, [{bit,X} | RestVal], NamedBitList, DoTag); - -encode_bit_string(C, [FirstVal| RestVal], NamedBitList, DoTag) when integer(FirstVal) -> - encode_bit_string_bits(C, [FirstVal | RestVal], NamedBitList, DoTag); - -encode_bit_string(_, 0, _, []) -> - {[?N_BIT_STRING,1,0],3}; - -encode_bit_string(_, 0, _, DoTag) -> - dotag(DoTag, ?N_BIT_STRING, {<<0>>,1}); - -encode_bit_string(_, [], _, []) -> - {[?N_BIT_STRING,1,0],3}; - -encode_bit_string(_, [], _, DoTag) -> - dotag(DoTag, ?N_BIT_STRING, {<<0>>,1}); - -encode_bit_string(C, IntegerVal, NamedBitList, DoTag) when integer(IntegerVal) -> - BitListVal = int_to_bitlist(IntegerVal), - encode_bit_string_bits(C, BitListVal, NamedBitList, DoTag); - -encode_bit_string(C, {Name,BitList}, NamedBitList, DoTag) when atom(Name) -> - encode_bit_string(C, BitList, NamedBitList, DoTag). - - - -int_to_bitlist(0) -> - []; -int_to_bitlist(Int) when integer(Int), Int >= 0 -> - [Int band 1 | int_to_bitlist(Int bsr 1)]. - - -%%================================================================= -%% Encode BIT STRING of the form {Unused,BinBits}. -%% Unused is the number of unused bits in the last byte in BinBits -%% and BinBits is a binary representing the BIT STRING. -%%================================================================= -encode_bin_bit_string(C,{Unused,BinBits},_NamedBitList,DoTag)-> - case get_constraint(C,'SizeConstraint') of - no -> - remove_unused_then_dotag(DoTag,?N_BIT_STRING,Unused,BinBits); - {_Min,Max} -> - BBLen = (size(BinBits)*8)-Unused, - if - BBLen > Max -> - exit({error,{asn1, - {bitstring_length, - {{was,BBLen},{maximum,Max}}}}}); - true -> - remove_unused_then_dotag(DoTag,?N_BIT_STRING, - Unused,BinBits) - end; - Size -> - case ((size(BinBits)*8)-Unused) of - BBSize when BBSize =< Size -> - remove_unused_then_dotag(DoTag,?N_BIT_STRING, - Unused,BinBits); - BBSize -> - exit({error,{asn1, - {bitstring_length, - {{was,BBSize},{should_be,Size}}}}}) - end - end. - -remove_unused_then_dotag(DoTag,StringType,Unused,BinBits) -> - case Unused of - 0 when (size(BinBits) == 0),DoTag==[] -> - %% time optimization of next case - {[StringType,1,0],3}; - 0 when (size(BinBits) == 0) -> - dotag(DoTag,StringType,{<<0>>,1}); - 0 when DoTag==[]-> % time optimization of next case - dotag_universal(StringType,[Unused|BinBits],size(BinBits)+1); -% {LenEnc,Len} = encode_legth(size(BinBits)+1), -% {[StringType,LenEnc,[Unused|BinBits]],size(BinBits)+1+Len+1}; - 0 -> - dotag(DoTag,StringType,<<Unused,BinBits/binary>>); - Num when DoTag == [] -> % time optimization of next case - N = (size(BinBits)-1), - <<BBits:N/binary,LastByte>> = BinBits, - dotag_universal(StringType, - [Unused,BBits,(LastByte bsr Num) bsl Num], - size(BinBits)+1); -% {LenEnc,Len} = encode_legth(size(BinBits)+1), -% {[StringType,LenEnc,[Unused,BBits,(LastByte bsr Num) bsl Num], -% 1+Len+size(BinBits)+1}; - Num -> - N = (size(BinBits)-1), - <<BBits:N/binary,LastByte>> = BinBits, - dotag(DoTag,StringType,{[Unused,binary_to_list(BBits) ++ - [(LastByte bsr Num) bsl Num]], - 1+size(BinBits)}) - end. - - -%%================================================================= -%% Encode named bits -%%================================================================= - -encode_bit_string_named(C, [FirstVal | RestVal], NamedBitList, DoTag) -> - {Len,Unused,OctetList} = - case get_constraint(C,'SizeConstraint') of - no -> - ToSetPos = get_all_bitposes([FirstVal | RestVal], - NamedBitList, []), - BitList = make_and_set_list(lists:max(ToSetPos)+1, - ToSetPos, 0), - encode_bitstring(BitList); - {_Min,Max} -> - ToSetPos = get_all_bitposes([FirstVal | RestVal], - NamedBitList, []), - BitList = make_and_set_list(Max, ToSetPos, 0), - encode_bitstring(BitList); - Size -> - ToSetPos = get_all_bitposes([FirstVal | RestVal], - NamedBitList, []), - BitList = make_and_set_list(Size, ToSetPos, 0), - encode_bitstring(BitList) - end, - case DoTag of - [] -> - dotag_universal(?N_BIT_STRING,[Unused|OctetList],Len+1); -% {EncLen,LenLen} = encode_length(Len+1), -% {[?N_BIT_STRING,EncLen,Unused,OctetList],1+LenLen+Len+1}; - _ -> - dotag(DoTag, ?N_BIT_STRING, {[Unused|OctetList],Len+1}) - end. - - -%%---------------------------------------- -%% 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) when atom(Val) -> - case lists:keysearch(Val, 1, NamedBitList) of - {value, {_ValName, ValPos}} -> - get_all_bitposes(Rest, NamedBitList, [ValPos | Ack]); - _ -> - exit({error,{asn1, {bitstring_namedbit, Val}}}) - end; -get_all_bitposes([], _NamedBitList, Ack) -> - lists:sort(Ack). - - -%%---------------------------------------- -%% make_and_set_list(Len of list to return, [list of positions to set to 1])-> -%% returns list of Len length, with all in SetPos set. -%% in positioning in list the first element is 0, the second 1 etc.., but -%% Len will make a list of length Len, not Len + 1. -%% BitList = make_and_set_list(C, ToSetPos, 0), -%%---------------------------------------- - -make_and_set_list(0, [], _) -> []; -make_and_set_list(0, _, _) -> - exit({error,{asn1,bitstring_sizeconstraint}}); -make_and_set_list(Len, [XPos|SetPos], XPos) -> - [1 | make_and_set_list(Len - 1, SetPos, XPos + 1)]; -make_and_set_list(Len, [Pos|SetPos], XPos) -> - [0 | make_and_set_list(Len - 1, [Pos | SetPos], XPos + 1)]; -make_and_set_list(Len, [], XPos) -> - [0 | make_and_set_list(Len - 1, [], XPos + 1)]. - - - - - - -%%================================================================= -%% Encode bit string for lists of ones and zeroes -%%================================================================= -encode_bit_string_bits(C, BitListVal, _NamedBitList, DoTag) when list(BitListVal) -> - {Len,Unused,OctetList} = - case get_constraint(C,'SizeConstraint') of - no -> - encode_bitstring(BitListVal); - Constr={Min,Max} when integer(Min),integer(Max) -> - encode_constr_bit_str_bits(Constr,BitListVal,DoTag); - {Constr={_,_},[]} -> - %% constraint with extension mark - encode_constr_bit_str_bits(Constr,BitListVal,DoTag); - Constr={{_,_},{_,_}} ->%{{Min1,Max1},{Min2,Max2}} - %% constraint with extension mark - encode_constr_bit_str_bits(Constr,BitListVal,DoTag); - Size -> - case length(BitListVal) of - BitSize when BitSize == Size -> - encode_bitstring(BitListVal); - BitSize when BitSize < Size -> - PaddedList = - pad_bit_list(Size-BitSize,BitListVal), - encode_bitstring(PaddedList); - BitSize -> - exit({error, - {asn1, - {bitstring_length, - {{was,BitSize}, - {should_be,Size}}}}}) - end - end, - %%add unused byte to the Len - case DoTag of - [] -> - dotag_universal(?N_BIT_STRING,[Unused|OctetList],Len+1); -% {EncLen,LenLen}=encode_length(Len+1), -% {[?N_BIT_STRING,EncLen,Unused|OctetList],1+LenLen+Len+1}; - _ -> - dotag(DoTag, ?N_BIT_STRING, - {[Unused | OctetList],Len+1}) - end. - - -encode_constr_bit_str_bits({_Min,Max},BitListVal,_DoTag) -> - BitLen = length(BitListVal), - if - BitLen > Max -> - exit({error,{asn1,{bitstring_length,{{was,BitLen}, - {maximum,Max}}}}}); - true -> - encode_bitstring(BitListVal) - end; -encode_constr_bit_str_bits({{_Min1,Max1},{Min2,Max2}},BitListVal,_DoTag) -> - BitLen = length(BitListVal), - case BitLen of - Len when Len > Max2 -> - exit({error,{asn1,{bitstring_length,{{was,BitLen}, - {maximum,Max2}}}}}); - Len when Len > Max1, Len < Min2 -> - exit({error,{asn1,{bitstring_length,{{was,BitLen}, - {not_allowed_interval, - Max1,Min2}}}}}); - _ -> - encode_bitstring(BitListVal) - end. - -%% returns a list of length Size + length(BitListVal), with BitListVal -%% as the most significant elements followed by padded zero elements -pad_bit_list(Size,BitListVal) -> - Tail = lists:duplicate(Size,0), - lists:append(BitListVal,Tail). - -%%================================================================= -%% Do the actual encoding -%% ([bitlist]) -> {ListLen, UnusedBits, OctetList} -%%================================================================= - -encode_bitstring([B8, B7, B6, B5, B4, B3, B2, B1 | Rest]) -> - Val = (B8 bsl 7) bor (B7 bsl 6) bor (B6 bsl 5) bor (B5 bsl 4) bor - (B4 bsl 3) bor (B3 bsl 2) bor (B2 bsl 1) bor B1, - encode_bitstring(Rest, [Val], 1); -encode_bitstring(Val) -> - {Unused, Octet} = unused_bitlist(Val, 7, 0), - {1, Unused, [Octet]}. - -encode_bitstring([B8, B7, B6, B5, B4, B3, B2, B1 | Rest], Ack, Len) -> - Val = (B8 bsl 7) bor (B7 bsl 6) bor (B6 bsl 5) bor (B5 bsl 4) bor - (B4 bsl 3) bor (B3 bsl 2) bor (B2 bsl 1) bor B1, - encode_bitstring(Rest, [Ack | [Val]], Len + 1); -%%even multiple of 8 bits.. -encode_bitstring([], Ack, Len) -> - {Len, 0, Ack}; -%% unused bits in last octet -encode_bitstring(Rest, Ack, Len) -> -% io:format("uneven ~w ~w ~w~n",[Rest, Ack, Len]), - {Unused, Val} = unused_bitlist(Rest, 7, 0), - {Len + 1, Unused, [Ack | [Val]]}. - -%%%%%%%%%%%%%%%%%% -%% unused_bitlist([list of ones and zeros <= 7], 7, []) -> -%% {Unused bits, Last octet with bits moved to right} -unused_bitlist([], Trail, Ack) -> - {Trail + 1, Ack}; -unused_bitlist([Bit | Rest], Trail, Ack) -> -%% io:format("trail Bit: ~w Rest: ~w Trail: ~w Ack:~w~n",[Bit, Rest, Trail, Ack]), - unused_bitlist(Rest, Trail - 1, (Bit bsl Trail) bor Ack). - - -%%============================================================================ -%% decode bitstring value -%% (Buffer, Range, NamedNumberList, HasTag, TotalLen) -> {Integer, Remain, RemovedBytes} -%%============================================================================ - -decode_compact_bit_string(Buffer, Range, NamedNumberList, Tags, LenIn, OptOrMand) -> -% NewTags = new_tags(HasTag,#tag{class=?UNIVERSAL,number=?N_BIT_STRING}), - decode_restricted_string(Buffer, Range, ?N_BIT_STRING, Tags, LenIn, - NamedNumberList, OptOrMand,bin). - -decode_bit_string(Buffer, Range, NamedNumberList, Tags, LenIn, OptOrMand) -> -% NewTags = new_tags(HasTag,#tag{class=?UNIVERSAL,number=?N_BIT_STRING}), - decode_restricted_string(Buffer, Range, ?N_BIT_STRING, Tags, LenIn, - NamedNumberList, OptOrMand,old). - - -decode_bit_string2(1,<<0 ,Buffer/binary>>,_NamedNumberList,RemovedBytes,BinOrOld) -> - case BinOrOld of - bin -> - {{0,<<>>},Buffer,RemovedBytes}; - _ -> - {[], Buffer, RemovedBytes} - end; -decode_bit_string2(Len,<<Unused,Buffer/binary>>,NamedNumberList, - RemovedBytes,BinOrOld) -> - L = Len - 1, - <<Bits:L/binary,BufferTail/binary>> = Buffer, - case NamedNumberList of - [] -> - case BinOrOld of - bin -> - {{Unused,Bits},BufferTail,RemovedBytes}; - _ -> - BitString = decode_bitstring2(L, Unused, Buffer), - {BitString,BufferTail, RemovedBytes} - end; - _ -> - BitString = decode_bitstring2(L, Unused, Buffer), - {decode_bitstring_NNL(BitString,NamedNumberList), - BufferTail, - RemovedBytes} - end. - -%%---------------------------------------- -%% Decode the in buffer to bits -%%---------------------------------------- -decode_bitstring2(1,Unused,<<B7:1,B6:1,B5:1,B4:1,B3:1,B2:1,B1:1,B0:1,_/binary>>) -> - lists:sublist([B7,B6,B5,B4,B3,B2,B1,B0],8-Unused); -decode_bitstring2(Len, Unused, - <<B7:1,B6:1,B5:1,B4:1,B3:1,B2:1,B1:1,B0:1,Buffer/binary>>) -> - [B7, B6, B5, B4, B3, B2, B1, B0 | - decode_bitstring2(Len - 1, Unused, Buffer)]. - -%%decode_bitstring2(1, Unused, Buffer) -> -%% make_bits_of_int(hd(Buffer), 128, 8-Unused); -%%decode_bitstring2(Len, Unused, [BitVal | Buffer]) -> -%% [B7, B6, B5, B4, B3, B2, B1, B0] = make_bits_of_int(BitVal, 128, 8), -%% [B7, B6, B5, B4, B3, B2, B1, B0 | -%% decode_bitstring2(Len - 1, Unused, Buffer)]. - - -%%make_bits_of_int(_, _, 0) -> -%% []; -%%make_bits_of_int(BitVal, MaskVal, Unused) when Unused > 0 -> -%% X = case MaskVal band BitVal of -%% 0 -> 0 ; -%% _ -> 1 -%% end, -%% [X | make_bits_of_int(BitVal, MaskVal bsr 1, Unused - 1)]. - - - -%%---------------------------------------- -%% Decode the bitlist to names -%%---------------------------------------- - - -decode_bitstring_NNL(BitList,NamedNumberList) -> - decode_bitstring_NNL(BitList,NamedNumberList,0,[]). - - -decode_bitstring_NNL([],_,_No,Result) -> - lists:reverse(Result); - -decode_bitstring_NNL([B|BitList],[{Name,No}|NamedNumberList],No,Result) -> - if - B == 0 -> - decode_bitstring_NNL(BitList,NamedNumberList,No+1,Result); - true -> - decode_bitstring_NNL(BitList,NamedNumberList,No+1,[Name|Result]) - end; -decode_bitstring_NNL([1|BitList],NamedNumberList,No,Result) -> - decode_bitstring_NNL(BitList,NamedNumberList,No+1,[{bit,No}|Result]); -decode_bitstring_NNL([0|BitList],NamedNumberList,No,Result) -> - decode_bitstring_NNL(BitList,NamedNumberList,No+1,Result). - - -%%============================================================================ -%% Octet string, ITU_T X.690 Chapter 8.7 -%% -%% encode octet string -%% The OctetList must be a flat list of integers in the range 0..255 -%% the function does not check this because it takes to much time -%%============================================================================ -encode_octet_string(_C, OctetList, []) when binary(OctetList) -> - dotag_universal(?N_OCTET_STRING,OctetList,size(OctetList)); -encode_octet_string(_C, OctetList, DoTag) when binary(OctetList) -> - dotag(DoTag, ?N_OCTET_STRING, {OctetList,size(OctetList)}); -encode_octet_string(_C, OctetList, DoTag) when list(OctetList) -> - case length(OctetList) of - Len when DoTag == [] -> - dotag_universal(?N_OCTET_STRING,OctetList,Len); - Len -> - dotag(DoTag, ?N_OCTET_STRING, {OctetList,Len}) - end; -% encode_octet_string(C, OctetList, DoTag) when list(OctetList) -> -% dotag(DoTag, ?N_OCTET_STRING, {OctetList,length(OctetList)}); -encode_octet_string(C, {Name,OctetList}, DoTag) when atom(Name) -> - encode_octet_string(C, OctetList, DoTag). - - -%%============================================================================ -%% decode octet string -%% (Buffer, Range, HasTag, TotalLen) -> {String, Remain, RemovedBytes} -%% -%% Octet string is decoded as a restricted string -%%============================================================================ -decode_octet_string(Buffer, Range, Tags, TotalLen, OptOrMand) -> -% NewTags = new_tags(HasTag,#tag{class=?UNIVERSAL,number=?N_OCTET_STRING}), - decode_restricted_string(Buffer, Range, ?N_OCTET_STRING, - Tags, TotalLen, [], OptOrMand,old). - -%%============================================================================ -%% Null value, ITU_T X.690 Chapter 8.8 -%% -%% encode NULL value -%%============================================================================ - -encode_null(_, []) -> - {[?N_NULL,0],2}; -encode_null(_, DoTag) -> - dotag(DoTag, ?N_NULL, {[],0}). - -%%============================================================================ -%% decode NULL value -%% (Buffer, HasTag, TotalLen) -> {NULL, Remain, RemovedBytes} -%%============================================================================ -decode_null(Buffer, Tags, OptOrMand) -> - NewTags = new_tags(Tags,#tag{class=?UNIVERSAL,number=?N_NULL}), - decode_null_notag(Buffer, NewTags, OptOrMand). - -decode_null_notag(Buffer, Tags, OptOrMand) -> - {RestTags, {FormLen, Buffer0, Rb0}} = - check_tags_i(Tags, Buffer, OptOrMand), - - case FormLen of - {?CONSTRUCTED,Len} -> - {_Buffer00,RestBytes} = split_list(Buffer0,Len), - {Val01, Buffer01, Rb01} = decode_null_notag(Buffer0, RestTags, - OptOrMand), - {Buffer02, Rb02} = restbytes2(RestBytes,Buffer01,noext), - {Val01, Buffer02, Rb0+Rb01+Rb02}; - {_,0} -> - {'NULL', Buffer0, Rb0}; - {_,Len} -> - exit({error,{asn1,{invalid_length,'NULL',Len}}}) - end. - - -%%============================================================================ -%% Object identifier, ITU_T X.690 Chapter 8.19 -%% -%% encode Object Identifier value -%%============================================================================ - -encode_object_identifier({Name,Val}, DoTag) when atom(Name) -> - encode_object_identifier(Val, DoTag); -encode_object_identifier(Val, []) -> - {EncVal,Len} = e_object_identifier(Val), - dotag_universal(?N_OBJECT_IDENTIFIER,EncVal,Len); -encode_object_identifier(Val, DoTag) -> - dotag(DoTag, ?N_OBJECT_IDENTIFIER, e_object_identifier(Val)). - -e_object_identifier({'OBJECT IDENTIFIER', V}) -> - e_object_identifier(V); -e_object_identifier({Cname, V}) when atom(Cname), tuple(V) -> - e_object_identifier(tuple_to_list(V)); -e_object_identifier({Cname, V}) when atom(Cname), list(V) -> - e_object_identifier(V); -e_object_identifier(V) when tuple(V) -> - e_object_identifier(tuple_to_list(V)); - -%%%%%%%%%%%%%%% -%% e_object_identifier([List of Obect Identifiers]) -> -%% {[Encoded Octetlist of ObjIds], IntLength} -%% -e_object_identifier([E1, E2 | Tail]) -> - Head = 40*E1 + E2, % wow! - {H,Lh} = mk_object_val(Head), - {R,Lr} = enc_obj_id_tail(Tail, [], 0), - {[H|R], Lh+Lr}. - -enc_obj_id_tail([], Ack, Len) -> - {lists:reverse(Ack), Len}; -enc_obj_id_tail([H|T], Ack, Len) -> - {B, L} = mk_object_val(H), - enc_obj_id_tail(T, [B|Ack], Len+L). - -%% e_object_identifier([List of Obect Identifiers]) -> -%% {[Encoded Octetlist of ObjIds], IntLength} -%% -%%e_object_identifier([E1, E2 | Tail]) -> -%% Head = 40*E1 + E2, % wow! -%% F = fun(Val, AckLen) -> -%% {L, Ack} = mk_object_val(Val), -%% {L, Ack + AckLen} -%% end, -%% {Octets, Len} = lists:mapfoldl(F, 0, [Head | Tail]). - -%%%%%%%%%%% -%% mk_object_val(Value) -> {OctetList, Len} -%% returns a Val as a list of octets, the 8 bit is allways set to one except -%% for the last octet, where its 0 -%% - - -mk_object_val(Val) when Val =< 127 -> - {[255 band Val], 1}; -mk_object_val(Val) -> - mk_object_val(Val bsr 7, [Val band 127], 1). -mk_object_val(0, Ack, Len) -> - {Ack, Len}; -mk_object_val(Val, Ack, Len) -> - mk_object_val(Val bsr 7, [((Val band 127) bor 128) | Ack], Len + 1). - - - -%%============================================================================ -%% decode Object Identifier value -%% (Buffer, HasTag, TotalLen) -> {{ObjId}, Remain, RemovedBytes} -%%============================================================================ - -decode_object_identifier(Buffer, Tags, OptOrMand) -> - NewTags = new_tags(Tags,#tag{class=?UNIVERSAL, - number=?N_OBJECT_IDENTIFIER}), - decode_object_identifier_notag(Buffer, NewTags, OptOrMand). - -decode_object_identifier_notag(Buffer, Tags, OptOrMand) -> - {RestTags, {FormLen, Buffer0, Rb0}} = - check_tags_i(Tags, Buffer, OptOrMand), - - case FormLen of - {?CONSTRUCTED,Len} -> - {Buffer00,RestBytes} = split_list(Buffer0,Len), - {Val01, Buffer01, Rb01} = - decode_object_identifier_notag(Buffer00, - RestTags, OptOrMand), - {Buffer02, Rb02} = restbytes2(RestBytes,Buffer01,noext), - {Val01, Buffer02, Rb0+Rb01+Rb02}; - {_,Len} -> - {[AddedObjVal|ObjVals],Buffer01} = - dec_subidentifiers(Buffer0,0,[],Len), - {Val1, Val2} = if - AddedObjVal < 40 -> - {0, AddedObjVal}; - AddedObjVal < 80 -> - {1, AddedObjVal - 40}; - true -> - {2, AddedObjVal - 80} - end, - {list_to_tuple([Val1, Val2 | ObjVals]), Buffer01, - Rb0+Len} - end. - -dec_subidentifiers(Buffer,_Av,Al,0) -> - {lists:reverse(Al),Buffer}; -dec_subidentifiers(<<1:1,H:7,T/binary>>,Av,Al,Len) -> - dec_subidentifiers(T,(Av bsl 7) + H,Al,Len-1); -dec_subidentifiers(<<H,T/binary>>,Av,Al,Len) -> - dec_subidentifiers(T,0,[((Av bsl 7) + H)|Al],Len-1). - - -%%dec_subidentifiers(Buffer,Av,Al,0) -> -%% {lists:reverse(Al),Buffer}; -%%dec_subidentifiers([H|T],Av,Al,Len) when H >=16#80 -> -%% dec_subidentifiers(T,(Av bsl 7) + (H band 16#7F),Al,Len-1); -%%dec_subidentifiers([H|T],Av,Al,Len) -> -%% dec_subidentifiers(T,0,[(Av bsl 7) + H |Al],Len-1). - - -%%============================================================================ -%% Restricted character string types, ITU_T X.690 Chapter 8.20 -%% -%% encode Numeric Printable Teletex Videotex Visible IA5 Graphic General strings -%%============================================================================ -encode_restricted_string(_C, OctetList, StringType, []) - when binary(OctetList) -> - dotag_universal(StringType,OctetList,size(OctetList)); -encode_restricted_string(_C, OctetList, StringType, DoTag) - when binary(OctetList) -> - dotag(DoTag, StringType, {OctetList, size(OctetList)}); -encode_restricted_string(_C, OctetList, StringType, []) - when list(OctetList) -> - dotag_universal(StringType,OctetList,length(OctetList)); -encode_restricted_string(_C, OctetList, StringType, DoTag) - when list(OctetList) -> - dotag(DoTag, StringType, {OctetList, length(OctetList)}); -encode_restricted_string(C,{Name,OctetL},StringType,DoTag) when atom(Name)-> - encode_restricted_string(C, OctetL, StringType, DoTag). - -%%============================================================================ -%% decode Numeric Printable Teletex Videotex Visible IA5 Graphic General strings -%% (Buffer, Range, StringType, HasTag, TotalLen) -> -%% {String, Remain, RemovedBytes} -%%============================================================================ - -decode_restricted_string(Buffer, Range, StringType, Tags, LenIn, OptOrMand) -> - {Val,Buffer2,Rb} = - decode_restricted_string_tag(Buffer, Range, StringType, Tags, - LenIn, [], OptOrMand,old), - {check_and_convert_restricted_string(Val,StringType,Range,[],old), - Buffer2,Rb}. - - -decode_restricted_string(Buffer, Range, StringType, Tags, LenIn, NNList, OptOrMand, BinOrOld ) -> - {Val,Buffer2,Rb} = - decode_restricted_string_tag(Buffer, Range, StringType, Tags, - LenIn, NNList, OptOrMand, BinOrOld), - {check_and_convert_restricted_string(Val,StringType,Range,NNList,BinOrOld), - Buffer2,Rb}. - -decode_restricted_string_tag(Buffer, Range, StringType, TagsIn, LenIn, NNList, OptOrMand, BinOrOld ) -> - NewTags = new_tags(TagsIn, #tag{class=?UNIVERSAL,number=StringType}), - decode_restricted_string_notag(Buffer, Range, StringType, NewTags, - LenIn, NNList, OptOrMand, BinOrOld). - - - - -check_and_convert_restricted_string(Val,StringType,Range,NamedNumberList,_BinOrOld) -> - {StrLen,NewVal} = case StringType of - ?N_BIT_STRING when NamedNumberList /= [] -> - {no_check,Val}; - ?N_BIT_STRING when list(Val) -> - {length(Val),Val}; - ?N_BIT_STRING when tuple(Val) -> - {(size(element(2,Val))*8) - element(1,Val),Val}; - _ when binary(Val) -> - {size(Val),binary_to_list(Val)}; - _ when list(Val) -> - {length(Val), Val} - end, - case Range of - _ when StrLen == no_check -> - NewVal; - [] -> % No length constraint - NewVal; - {Lb,Ub} when StrLen >= Lb, Ub >= StrLen -> % variable length constraint - NewVal; - {{Lb,_Ub},[]} when StrLen >= Lb -> - NewVal; - {{Lb1,Ub1},{Lb2,Ub2}} when StrLen >= Lb1, StrLen =< Ub1; - StrLen =< Ub2, StrLen >= Lb2 -> - NewVal; - StrLen -> % fixed length constraint - NewVal; - {_,_} -> - exit({error,{asn1,{length,Range,Val}}}); - _Len when integer(_Len) -> - exit({error,{asn1,{length,Range,Val}}}); - _ -> % some strange constraint that we don't support yet - NewVal - end. - - -%%============================================================================= -%% Common routines for several string types including bit string -%% handles indefinite length -%%============================================================================= - - -decode_restricted_string_notag(Buffer, _Range, StringType, TagsIn, - _, NamedNumberList, OptOrMand,BinOrOld) -> - %%----------------------------------------------------------- - %% Get inner (the implicit tag or no tag) and - %% outer (the explicit tag) lengths. - %%----------------------------------------------------------- - {RestTags, {FormLength={_,_Len01}, Buffer0, Rb0}} = - check_tags_i(TagsIn, Buffer, OptOrMand), - - case FormLength of - {?CONSTRUCTED,Len} -> - {Buffer00, RestBytes} = split_list(Buffer0,Len), - {Val01, Buffer01, Rb01} = - decode_restricted_parts(Buffer00, RestBytes, [], StringType, - RestTags, - Len, NamedNumberList, - OptOrMand, - BinOrOld, 0, []), - {Val01, Buffer01, Rb0+Rb01}; - {_, Len} -> - {Val01, Buffer01, Rb01} = - decode_restricted(Buffer0, Len, StringType, - NamedNumberList, BinOrOld), - {Val01, Buffer01, Rb0+Rb01} - end. - - -decode_restricted_parts(Buffer, RestBytes, [], StringType, RestTags, Len, NNList, - OptOrMand, BinOrOld, AccRb, AccVal) -> - DecodeFun = case RestTags of - [] -> fun decode_restricted_string_tag/8; - _ -> fun decode_restricted_string_notag/8 - end, - {Val, Buffer1, Rb} = - DecodeFun(Buffer, [], StringType, RestTags, - no_length, NNList, - OptOrMand, BinOrOld), - {Buffer2,More} = - case Buffer1 of - <<0,0,Buffer10/binary>> when Len == indefinite -> - {Buffer10,false}; - <<>> -> - {RestBytes,false}; - _ -> - {Buffer1,true} - end, - {NewVal, NewRb} = - case StringType of - ?N_BIT_STRING when BinOrOld == bin -> - {concat_bit_binaries(AccVal, Val), AccRb+Rb}; - _ when binary(Val),binary(AccVal) -> - {<<AccVal/binary,Val/binary>>,AccRb+Rb}; - _ when binary(Val), AccVal==[] -> - {Val,AccRb+Rb}; - _ -> - {AccVal++Val, AccRb+Rb} - end, - case More of - false -> - {NewVal, Buffer2, NewRb}; - true -> - decode_restricted_parts(Buffer2, RestBytes, [], StringType, RestTags, Len, NNList, - OptOrMand, BinOrOld, NewRb, NewVal) - end. - - - -decode_restricted(Buffer, InnerLen, StringType, NamedNumberList,BinOrOld) -> - - case StringType of - ?N_BIT_STRING -> - decode_bit_string2(InnerLen,Buffer,NamedNumberList,InnerLen,BinOrOld); - - ?N_UniversalString -> - <<PreBuff:InnerLen/binary,RestBuff/binary>> = Buffer,%%added for binary - UniString = mk_universal_string(binary_to_list(PreBuff)), - {UniString,RestBuff,InnerLen}; - ?N_BMPString -> - <<PreBuff:InnerLen/binary,RestBuff/binary>> = Buffer,%%added for binary - BMP = mk_BMP_string(binary_to_list(PreBuff)), - {BMP,RestBuff,InnerLen}; - _ -> - <<PreBuff:InnerLen/binary,RestBuff/binary>> = Buffer,%%added for binary - {PreBuff, RestBuff, InnerLen} - end. - - - -%%============================================================================ -%% encode Universal string -%%============================================================================ - -encode_universal_string(C, {Name, Universal}, DoTag) when atom(Name) -> - encode_universal_string(C, Universal, DoTag); -encode_universal_string(_C, Universal, []) -> - OctetList = mk_uni_list(Universal), - dotag_universal(?N_UniversalString,OctetList,length(OctetList)); -encode_universal_string(_C, Universal, DoTag) -> - OctetList = mk_uni_list(Universal), - dotag(DoTag, ?N_UniversalString, {OctetList,length(OctetList)}). - -mk_uni_list(In) -> - mk_uni_list(In,[]). - -mk_uni_list([],List) -> - lists:reverse(List); -mk_uni_list([{A,B,C,D}|T],List) -> - mk_uni_list(T,[D,C,B,A|List]); -mk_uni_list([H|T],List) -> - mk_uni_list(T,[H,0,0,0|List]). - -%%=========================================================================== -%% decode Universal strings -%% (Buffer, Range, StringType, HasTag, LenIn) -> -%% {String, Remain, RemovedBytes} -%%=========================================================================== - -decode_universal_string(Buffer, Range, Tags, LenIn, OptOrMand) -> -% NewTags = new_tags(HasTag, #tag{class=?UNIVERSAL,number=?N_UniversalString}), - decode_restricted_string(Buffer, Range, ?N_UniversalString, - Tags, LenIn, [], OptOrMand,old). - - -mk_universal_string(In) -> - mk_universal_string(In,[]). - -mk_universal_string([],Acc) -> - lists:reverse(Acc); -mk_universal_string([0,0,0,D|T],Acc) -> - mk_universal_string(T,[D|Acc]); -mk_universal_string([A,B,C,D|T],Acc) -> - mk_universal_string(T,[{A,B,C,D}|Acc]). - - -%%============================================================================ -%% encode BMP string -%%============================================================================ - -encode_BMP_string(C, {Name,BMPString}, DoTag) when atom(Name)-> - encode_BMP_string(C, BMPString, DoTag); -encode_BMP_string(_C, BMPString, []) -> - OctetList = mk_BMP_list(BMPString), - dotag_universal(?N_BMPString,OctetList,length(OctetList)); -encode_BMP_string(_C, BMPString, DoTag) -> - OctetList = mk_BMP_list(BMPString), - dotag(DoTag, ?N_BMPString, {OctetList,length(OctetList)}). - -mk_BMP_list(In) -> - mk_BMP_list(In,[]). - -mk_BMP_list([],List) -> - lists:reverse(List); -mk_BMP_list([{0,0,C,D}|T],List) -> - mk_BMP_list(T,[D,C|List]); -mk_BMP_list([H|T],List) -> - mk_BMP_list(T,[H,0|List]). - -%%============================================================================ -%% decode (OctetList, Range(ignored), tag|notag) -> {ValList, RestList} -%% (Buffer, Range, StringType, HasTag, TotalLen) -> -%% {String, Remain, RemovedBytes} -%%============================================================================ -decode_BMP_string(Buffer, Range, Tags, LenIn, OptOrMand) -> -% NewTags = new_tags(HasTag, #tag{class=?UNIVERSAL,number=?N_BMPString}), - decode_restricted_string(Buffer, Range, ?N_BMPString, - Tags, LenIn, [], OptOrMand,old). - -mk_BMP_string(In) -> - mk_BMP_string(In,[]). - -mk_BMP_string([],US) -> - lists:reverse(US); -mk_BMP_string([0,B|T],US) -> - mk_BMP_string(T,[B|US]); -mk_BMP_string([C,D|T],US) -> - mk_BMP_string(T,[{0,0,C,D}|US]). - - -%%============================================================================ -%% Generalized time, ITU_T X.680 Chapter 39 -%% -%% encode Generalized time -%%============================================================================ - -encode_generalized_time(C, {Name,OctetList}, DoTag) when atom(Name) -> - encode_generalized_time(C, OctetList, DoTag); -encode_generalized_time(_C, OctetList, []) -> - dotag_universal(?N_GeneralizedTime,OctetList,length(OctetList)); -encode_generalized_time(_C, OctetList, DoTag) -> - dotag(DoTag, ?N_GeneralizedTime, {OctetList,length(OctetList)}). - -%%============================================================================ -%% decode Generalized time -%% (Buffer, Range, HasTag, TotalLen) -> {String, Remain, RemovedBytes} -%%============================================================================ - -decode_generalized_time(Buffer, Range, Tags, TotalLen, OptOrMand) -> - NewTags = new_tags(Tags,#tag{class=?UNIVERSAL, - number=?N_GeneralizedTime}), - decode_generalized_time_notag(Buffer, Range, NewTags, TotalLen, OptOrMand). - -decode_generalized_time_notag(Buffer, Range, Tags, TotalLen, OptOrMand) -> - {RestTags, {FormLen, Buffer0, Rb0}} = - check_tags_i(Tags, Buffer, OptOrMand), - - case FormLen of - {?CONSTRUCTED,Len} -> - {Buffer00,RestBytes} = split_list(Buffer0,Len), - {Val01, Buffer01, Rb01} = - decode_generalized_time_notag(Buffer00, Range, - RestTags, TotalLen, - OptOrMand), - {Buffer02, Rb02} = restbytes2(RestBytes,Buffer01,noext), - {Val01, Buffer02, Rb0+Rb01+Rb02}; - {_,Len} -> - <<PreBuff:Len/binary,RestBuff/binary>> = Buffer0, - {binary_to_list(PreBuff), RestBuff, Rb0+Len} - end. - -%%============================================================================ -%% Universal time, ITU_T X.680 Chapter 40 -%% -%% encode UTC time -%%============================================================================ - -encode_utc_time(C, {Name,OctetList}, DoTag) when atom(Name) -> - encode_utc_time(C, OctetList, DoTag); -encode_utc_time(_C, OctetList, []) -> - dotag_universal(?N_UTCTime, OctetList,length(OctetList)); -encode_utc_time(_C, OctetList, DoTag) -> - dotag(DoTag, ?N_UTCTime, {OctetList,length(OctetList)}). - -%%============================================================================ -%% decode UTC time -%% (Buffer, Range, HasTag, TotalLen) -> {String, Remain, RemovedBytes} -%%============================================================================ - -decode_utc_time(Buffer, Range, Tags, TotalLen, OptOrMand) -> - NewTags = new_tags(Tags,#tag{class=?UNIVERSAL,number=?N_UTCTime}), - decode_utc_time_notag(Buffer, Range, NewTags, TotalLen, OptOrMand). - -decode_utc_time_notag(Buffer, Range, Tags, TotalLen, OptOrMand) -> - {RestTags, {FormLen, Buffer0, Rb0}} = - check_tags_i(Tags, Buffer, OptOrMand), - - case FormLen of - {?CONSTRUCTED,Len} -> - {Buffer00,RestBytes} = split_list(Buffer0,Len), - {Val01, Buffer01, Rb01} = - decode_utc_time_notag(Buffer00, Range, - RestTags, TotalLen, - OptOrMand), - {Buffer02, Rb02} = restbytes2(RestBytes,Buffer01,noext), - {Val01, Buffer02, Rb0+Rb01+Rb02}; - {_,Len} -> - <<PreBuff:Len/binary,RestBuff/binary>> = Buffer0, - {binary_to_list(PreBuff), RestBuff, Rb0+Len} - end. - - -%%============================================================================ -%% Length handling -%% -%% Encode length -%% -%% encode_length(Int | indefinite) -> -%% [<127]| [128 + Int (<127),OctetList] | [16#80] -%%============================================================================ - -encode_length(indefinite) -> - {[16#80],1}; % 128 -encode_length(L) when L =< 16#7F -> - {[L],1}; -encode_length(L) -> - Oct = minimum_octets(L), - Len = length(Oct), - if - Len =< 126 -> - {[ (16#80+Len) | Oct ],Len+1}; - true -> - exit({error,{asn1, to_long_length_oct, Len}}) - end. - - -%% Val must be >= 0 -minimum_octets(Val) -> - minimum_octets(Val,[]). - -minimum_octets(0,Acc) -> - Acc; -minimum_octets(Val, Acc) -> - minimum_octets((Val bsr 8),[Val band 16#FF | Acc]). - - -%%=========================================================================== -%% Decode length -%% -%% decode_length(OctetList) -> {{indefinite, RestOctetsL}, NoRemovedBytes} | -%% {{Length, RestOctetsL}, NoRemovedBytes} -%%=========================================================================== - -decode_length(<<1:1,0:7,T/binary>>) -> - {{indefinite, T}, 1}; -decode_length(<<0:1,Length:7,T/binary>>) -> - {{Length,T},1}; -decode_length(<<1:1,LL:7,T/binary>>) -> - <<Length:LL/unit:8,Rest/binary>> = T, - {{Length,Rest}, LL+1}. - -%decode_length([128 | T]) -> -% {{indefinite, T},1}; -%decode_length([H | T]) when H =< 127 -> -% {{H, T},1}; -%decode_length([H | T]) -> -% dec_long_length(H band 16#7F, T, 0, 1). - - -%%dec_long_length(0, Buffer, Acc, Len) -> -%% {{Acc, Buffer},Len}; -%%dec_long_length(Bytes, [H | T], Acc, Len) -> -%% dec_long_length(Bytes - 1, T, (Acc bsl 8) + H, Len+1). - -%%=========================================================================== -%% Decode tag and length -%% -%% decode_tag_and_length(Buffer) -> {Tag, Len, RemainingBuffer, RemovedBytes} -%% -%%=========================================================================== - -decode_tag_and_length(Buffer) -> - {Tag, Buffer2, RemBytesTag} = decode_tag(Buffer), - {{Len, Buffer3}, RemBytesLen} = decode_length(Buffer2), - {Tag, Len, Buffer3, RemBytesTag+RemBytesLen}. - - -%%============================================================================ -%% Check if valid tag -%% -%% check_if_valid_tag(Tag, List_of_valid_tags, OptOrMand) -> name of the tag -%%=============================================================================== - -check_if_valid_tag(<<0,0,_/binary>>,_,_) -> - asn1_EOC; -check_if_valid_tag(<<>>, _, OptOrMand) -> - check_if_valid_tag2(false,[],[],OptOrMand); -check_if_valid_tag(Bytes, ListOfTags, OptOrMand) when binary(Bytes) -> - {Tag, _, _} = decode_tag(Bytes), - check_if_valid_tag(Tag, ListOfTags, OptOrMand); - -%% This alternative should be removed in the near future -%% Bytes as input should be the only necessary call -check_if_valid_tag(Tag, ListOfTags, OptOrMand) -> - {Class, _Form, TagNo} = Tag, - C = code_class(Class), - T = case C of - 'UNIVERSAL' -> - code_type(TagNo); - _ -> - TagNo - end, - check_if_valid_tag2({C,T}, ListOfTags, Tag, OptOrMand). - -check_if_valid_tag2(_Class_TagNo, [], Tag, mandatory) -> - exit({error,{asn1,{invalid_tag,Tag}}}); -check_if_valid_tag2(_Class_TagNo, [], Tag, _) -> - exit({error,{asn1,{no_optional_tag,Tag}}}); - -check_if_valid_tag2(Class_TagNo, [{TagName,TagList}|T], Tag, OptOrMand) -> - case check_if_valid_tag_loop(Class_TagNo, TagList) of - true -> - TagName; - false -> - check_if_valid_tag2(Class_TagNo, T, Tag, OptOrMand) - end. - -check_if_valid_tag_loop(_Class_TagNo,[]) -> - false; -check_if_valid_tag_loop(Class_TagNo,[H|T]) -> - %% It is not possible to distinguish between SEQUENCE OF and SEQUENCE, and - %% between SET OF and SET because both are coded as 16 and 17, respectively. - H_without_OF = case H of - {C, 'SEQUENCE OF'} -> - {C, 'SEQUENCE'}; - {C, 'SET OF'} -> - {C, 'SET'}; - Else -> - Else - end, - - case H_without_OF of - Class_TagNo -> - true; - {_,_} -> - check_if_valid_tag_loop(Class_TagNo,T); - _ -> - check_if_valid_tag_loop(Class_TagNo,H), - check_if_valid_tag_loop(Class_TagNo,T) - end. - - - -code_class(0) -> 'UNIVERSAL'; -code_class(16#40) -> 'APPLICATION'; -code_class(16#80) -> 'CONTEXT'; -code_class(16#C0) -> 'PRIVATE'. - - -code_type(1) -> 'BOOLEAN'; -code_type(2) -> 'INTEGER'; -code_type(3) -> 'BIT STRING'; -code_type(4) -> 'OCTET STRING'; -code_type(5) -> 'NULL'; -code_type(6) -> 'OBJECT IDENTIFIER'; -code_type(7) -> 'OBJECT DESCRIPTOR'; -code_type(8) -> 'EXTERNAL'; -code_type(9) -> 'REAL'; -code_type(10) -> 'ENUMERATED'; -code_type(11) -> 'EMBEDDED_PDV'; -code_type(16) -> 'SEQUENCE'; -code_type(16) -> 'SEQUENCE OF'; -code_type(17) -> 'SET'; -code_type(17) -> 'SET OF'; -code_type(18) -> 'NumericString'; -code_type(19) -> 'PrintableString'; -code_type(20) -> 'TeletexString'; -code_type(21) -> 'VideotexString'; -code_type(22) -> 'IA5String'; -code_type(23) -> 'UTCTime'; -code_type(24) -> 'GeneralizedTime'; -code_type(25) -> 'GraphicString'; -code_type(26) -> 'VisibleString'; -code_type(27) -> 'GeneralString'; -code_type(28) -> 'UniversalString'; -code_type(30) -> 'BMPString'; -code_type(Else) -> exit({error,{asn1,{unrecognized_type,Else}}}). - -%%------------------------------------------------------------------------- -%% decoding of the components of a SET -%%------------------------------------------------------------------------- - -decode_set(Rb, indefinite, <<0,0,Bytes/binary>>, _OptOrMand, _Fun3, Acc) -> - {lists:reverse(Acc),Bytes,Rb+2}; - -decode_set(Rb, indefinite, Bytes, OptOrMand, Fun3, Acc) -> - {Term, Remain, Rb1} = Fun3(Bytes, OptOrMand), - decode_set(Rb+Rb1, indefinite, Remain, OptOrMand, Fun3, [Term|Acc]); - -decode_set(Rb, Num, Bytes, _OptOrMand, _Fun3, Acc) when Num == 0 -> - {lists:reverse(Acc), Bytes, Rb}; - -decode_set(_, Num, _, _, _, _) when Num < 0 -> - exit({error,{asn1,{length_error,'SET'}}}); - -decode_set(Rb, Num, Bytes, OptOrMand, Fun3, Acc) -> - {Term, Remain, Rb1} = Fun3(Bytes, OptOrMand), - decode_set(Rb+Rb1, Num-Rb1, Remain, OptOrMand, Fun3, [Term|Acc]). - - -%%------------------------------------------------------------------------- -%% decoding of SEQUENCE OF and SET OF -%%------------------------------------------------------------------------- - -decode_components(Rb, indefinite, <<0,0,Bytes/binary>>, _Fun3, _TagIn, Acc) -> - {lists:reverse(Acc),Bytes,Rb+2}; - -decode_components(Rb, indefinite, Bytes, Fun3, TagIn, Acc) -> - {Term, Remain, Rb1} = Fun3(Bytes, mandatory, TagIn), - decode_components(Rb+Rb1, indefinite, Remain, Fun3, TagIn, [Term|Acc]); - -decode_components(Rb, Num, Bytes, _Fun3, _TagIn, Acc) when Num == 0 -> - {lists:reverse(Acc), Bytes, Rb}; - -decode_components(_, Num, _, _, _, _) when Num < 0 -> - exit({error,{asn1,{length_error,'SET/SEQUENCE OF'}}}); - -decode_components(Rb, Num, Bytes, Fun3, TagIn, Acc) -> - {Term, Remain, Rb1} = Fun3(Bytes, mandatory, TagIn), - decode_components(Rb+Rb1, Num-Rb1, Remain, Fun3, TagIn, [Term|Acc]). - -%%decode_components(Rb, indefinite, [0,0|Bytes], _Fun3, _TagIn, Acc) -> -%% {lists:reverse(Acc),Bytes,Rb+2}; - -decode_components(Rb, indefinite, <<0,0,Bytes/binary>>, _Fun4, _TagIn, _Fun, Acc) -> - {lists:reverse(Acc),Bytes,Rb+2}; - -decode_components(Rb, indefinite, Bytes, _Fun4, TagIn, _Fun, Acc) -> - {Term, Remain, Rb1} = _Fun4(Bytes, mandatory, TagIn, _Fun), - decode_components(Rb+Rb1, indefinite, Remain, _Fun4, TagIn, _Fun, [Term|Acc]); - -decode_components(Rb, Num, Bytes, _Fun4, _TagIn, _Fun, Acc) when Num == 0 -> - {lists:reverse(Acc), Bytes, Rb}; - -decode_components(_, Num, _, _, _, _, _) when Num < 0 -> - exit({error,{asn1,{length_error,'SET/SEQUENCE OF'}}}); - -decode_components(Rb, Num, Bytes, _Fun4, TagIn, _Fun, Acc) -> - {Term, Remain, Rb1} = _Fun4(Bytes, mandatory, TagIn, _Fun), - decode_components(Rb+Rb1, Num-Rb1, Remain, _Fun4, TagIn, _Fun, [Term|Acc]). - - - -%%------------------------------------------------------------------------- -%% INTERNAL HELPER FUNCTIONS (not exported) -%%------------------------------------------------------------------------- - - -%%========================================================================== -%% Encode tag -%% -%% dotag(tag | notag, TagValpattern | TagValTuple, [Length, Value]) -> [Tag] -%% TagValPattern is a correct bitpattern for a tag -%% TagValTuple is a tuple of three bitpatterns, Class, Form and TagNo where -%% Class = UNIVERSAL | APPLICATION | CONTEXT | PRIVATE -%% Form = Primitive | Constructed -%% TagNo = Number of tag -%%========================================================================== - - -dotag([], Tag, {Bytes,Len}) -> - dotag_universal(Tag,Bytes,Len); -dotag(Tags, Tag, {Bytes,Len}) -> - encode_tags(Tags ++ [#tag{class=?UNIVERSAL,number=Tag,form=?PRIMITIVE}], - Bytes, Len); - -dotag(Tags, Tag, Bytes) -> - encode_tags(Tags ++ [#tag{class=?UNIVERSAL,number=Tag,form=?PRIMITIVE}], - Bytes, size(Bytes)). - -dotag_universal(UniversalTag,Bytes,Len) when Len =< 16#7F-> - {[UniversalTag,Len,Bytes],2+Len}; -dotag_universal(UniversalTag,Bytes,Len) -> - {EncLen,LenLen}=encode_length(Len), - {[UniversalTag,EncLen,Bytes],1+LenLen+Len}. - -%% decoding postitive integer values. -decode_integer2(Len,Bin = <<0:1,_:7,_Bs/binary>>,RemovedBytes) -> - <<Int:Len/unit:8,Buffer2/binary>> = Bin, - {Int,Buffer2,RemovedBytes}; -%% decoding negative integer values. -decode_integer2(Len,<<1:1,B2:7,Bs/binary>>,RemovedBytes) -> - <<N:Len/unit:8,Buffer2/binary>> = <<B2,Bs/binary>>, - Int = N - (1 bsl (8 * Len - 1)), - {Int,Buffer2,RemovedBytes}. - -%%decode_integer2(Len,Buffer,Acc,RemovedBytes) when (hd(Buffer) band 16#FF) =< 16#7F -> -%% {decode_integer_pos(Buffer, 8 * (Len - 1)),skip(Buffer,Len),RemovedBytes}; -%%decode_integer2(Len,Buffer,Acc,RemovedBytes) -> -%% {decode_integer_neg(Buffer, 8 * (Len - 1)),skip(Buffer,Len),RemovedBytes}. - -%%decode_integer_pos([Byte|Tail], Shift) -> -%% (Byte bsl Shift) bor decode_integer_pos(Tail, Shift-8); -%%decode_integer_pos([], _) -> 0. - - -%%decode_integer_neg([Byte|Tail], Shift) -> -%% (-128 + (Byte band 127) bsl Shift) bor decode_integer_pos(Tail, Shift-8). - - -concat_bit_binaries([],Bin={_,_}) -> - Bin; -concat_bit_binaries({0,B1},{U2,B2}) -> - {U2,<<B1/binary,B2/binary>>}; -concat_bit_binaries({U1,B1},{U2,B2}) -> - S1 = (size(B1) * 8) - U1, - S2 = (size(B2) * 8) - U2, - PadBits = 8 - ((S1+S2) rem 8), - {PadBits, <<B1:S1/binary-unit:1,B2:S2/binary-unit:1,0:PadBits>>}; -concat_bit_binaries(L1,L2) when list(L1),list(L2) -> - %% this case occur when decoding with NNL - L1 ++ L2. - - -get_constraint(C,Key) -> - case lists:keysearch(Key,1,C) of - false -> - no; - {value,{_,V}} -> - V - end. - -%%skip(Buffer, 0) -> -%% Buffer; -%%skip([H | T], Len) -> -%% skip(T, Len-1). - -new_tags([],LastTag) -> - [LastTag]; -new_tags(Tags=[#tag{type='IMPLICIT'}],_LastTag) -> - Tags; -new_tags([T1 = #tag{type='IMPLICIT'},#tag{type=T2Type}|Rest],LastTag) -> - new_tags([T1#tag{type=T2Type}|Rest],LastTag); -new_tags(Tags,LastTag) -> - case lists:last(Tags) of - #tag{type='IMPLICIT'} -> - Tags; - _ -> - Tags ++ [LastTag] - end. |