diff options
Diffstat (limited to 'lib/asn1/src/asn1rt_ber_bin_v2.erl')
| -rw-r--r-- | lib/asn1/src/asn1rt_ber_bin_v2.erl | 1993 |
1 files changed, 0 insertions, 1993 deletions
diff --git a/lib/asn1/src/asn1rt_ber_bin_v2.erl b/lib/asn1/src/asn1rt_ber_bin_v2.erl deleted file mode 100644 index 10deecee6e..0000000000 --- a/lib/asn1/src/asn1rt_ber_bin_v2.erl +++ /dev/null @@ -1,1993 +0,0 @@ -%% -%% %CopyrightBegin% -%% -%% Copyright Ericsson AB 2002-2012. All Rights Reserved. -%% -%% 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 online 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. -%% -%% %CopyrightEnd% -%% -%% --module(asn1rt_ber_bin_v2). - -%% encoding / decoding of BER - --export([decode/1, decode/2, match_tags/2, encode/1, encode/2]). --export([fixoptionals/2, - encode_tag_val/1, - encode_tags/2, - encode_tags/3, - skip_ExtensionAdditions/2]). --export([encode_boolean/2,decode_boolean/2, - encode_integer/3,encode_integer/4, - decode_integer/3, decode_integer/4, - encode_enumerated/2, - encode_enumerated/4,decode_enumerated/4, - encode_real/3,decode_real/2, - encode_bit_string/4,decode_bit_string/4, - decode_compact_bit_string/4, - encode_octet_string/3,decode_octet_string/3, - encode_null/2,decode_null/2, - encode_relative_oid/2,decode_relative_oid/2, - encode_object_identifier/2,decode_object_identifier/2, - encode_restricted_string/4,decode_restricted_string/4, - encode_universal_string/3,decode_universal_string/3, - encode_UTF8_string/3,decode_UTF8_string/2, - encode_BMP_string/3,decode_BMP_string/3, - encode_generalized_time/3,decode_generalized_time/3, - encode_utc_time/3,decode_utc_time/3, - encode_length/1,decode_length/1, - decode_tag_and_length/1]). - --export([encode_open_type/1,encode_open_type/2, - decode_open_type/2,decode_open_type/3, - decode_open_type_as_binary/2, - decode_open_type_as_binary/3]). - --export([decode_primitive_incomplete/2,decode_selective/2]). - -% 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 - -% encode(Tlv={_Tag={?PRIMITIVE,_},_VList}) -> -% encode_primitive(Tlv); -% encode(Tlv) -> -% encode_constructed(Tlv). - -encode(Tlv) -> - encode(Tlv,erlang). - -encode(Tlv,_) when is_binary(Tlv) -> - Tlv; -encode([Tlv],Method) -> - encode(Tlv,Method); -encode(Tlv, nif) -> - asn1rt_nif:encode_ber_tlv(Tlv); -encode(Tlv, _) -> - encode_erl(Tlv). - -encode_erl({TlvTag,TlvVal}) when is_list(TlvVal) -> - %% constructed form of value - encode_tlv(TlvTag,TlvVal,?CONSTRUCTED); -encode_erl({TlvTag,TlvVal}) -> - encode_tlv(TlvTag,TlvVal,?PRIMITIVE). - -encode_tlv(TlvTag,TlvVal,Form) -> - Tag = encode_tlv_tag(TlvTag,Form), - {Val,VLen} = encode_tlv_val(TlvVal), - {Len,_LLen} = encode_length(VLen), - BinLen = list_to_binary(Len), - <<Tag/binary,BinLen/binary,Val/binary>>. - -encode_tlv_tag(ClassTagNo,Form) -> - Class = ClassTagNo bsr 16, - encode_tag_val({Class bsl 6,Form,(ClassTagNo - (Class bsl 16))}). - -encode_tlv_val(TlvL) when is_list(TlvL) -> - encode_tlv_list(TlvL,[]); -encode_tlv_val(Bin) -> - {Bin,size(Bin)}. - -encode_tlv_list([Tlv|Tlvs],Acc) -> - EncTlv = encode_erl(Tlv), - encode_tlv_list(Tlvs,[EncTlv|Acc]); -encode_tlv_list([],Acc) -> - Bin=list_to_binary(lists:reverse(Acc)), - {Bin,size(Bin)}. - -decode(B) -> - decode(B, erlang). - -%% asn1-1.7 -decode(B, nif) -> - case asn1rt_nif:decode_ber_tlv(B) of - {error, Reason} -> handle_error(Reason, B); - Else -> Else - end; -decode(B,erlang) when is_binary(B) -> - decode_primitive(B); -decode(Tlv,erlang) -> - {Tlv,<<>>}. - -handle_error([],_)-> - exit({error,{asn1,{"memory allocation problem"}}}); -handle_error({$1,_},L) -> % error in nif - exit({error,{asn1,L}}); -handle_error({$2,T},L) -> % error in nif due to wrong tag - exit({error,{asn1,{"bad tag after byte:",error_pos(T),L}}}); -handle_error({$3,T},L) -> % error in driver due to length error - exit({error,{asn1,{"bad length field after byte:", - error_pos(T),L}}}); -handle_error({$4,T},L) -> % error in driver due to indefinite length error - exit({error,{asn1, - {"indefinite length without end bytes after byte:", - error_pos(T),L}}}); -handle_error({$5,T},L) -> % error in driver due to indefinite length error - exit({error,{asn1,{"bad encoded value after byte:", - error_pos(T),L}}}); -handle_error(ErrL,L) -> - exit({error,{asn1,ErrL,L}}). - -error_pos([]) -> - "unknown position"; -error_pos([B])-> - B; -error_pos([B|Bs]) -> - BS = 8 * length(Bs), - B bsl BS + error_pos(Bs). - -decode_primitive(Bin) -> - {Form,TagNo,V,Rest} = decode_tag_and_length(Bin), - case Form of - 1 -> % constructed - {{TagNo,decode_constructed(V)},Rest}; - 0 -> % primitive - {{TagNo,V},Rest}; - 2 -> % constructed indefinite - {Vlist,Rest2} = decode_constructed_indefinite(V,[]), - {{TagNo,Vlist},Rest2} - end. - -decode_constructed(Bin) when byte_size(Bin) =:= 0 -> - []; -decode_constructed(Bin) -> - {Tlv,Rest} = decode_primitive(Bin), - [Tlv|decode_constructed(Rest)]. - -decode_constructed_indefinite(<<0,0,Rest/binary>>,Acc) -> - {lists:reverse(Acc),Rest}; -decode_constructed_indefinite(Bin,Acc) -> - {Tlv,Rest} = decode_primitive(Bin), - decode_constructed_indefinite(Rest, [Tlv|Acc]). - -%% decode_primitive_incomplete/2 decodes an encoded message incomplete -%% by help of the pattern attribute (first argument). -decode_primitive_incomplete([[default,TagNo]],Bin) -> %default - case decode_tag_and_length(Bin) of - {Form,TagNo,V,Rest} -> - decode_incomplete2(Form,TagNo,V,[],Rest); - _ -> - %{asn1_DEFAULT,Bin} - asn1_NOVALUE - end; -decode_primitive_incomplete([[default,TagNo,Directives]],Bin) -> %default, constructed type, Directives points into this type - case decode_tag_and_length(Bin) of - {Form,TagNo,V,Rest} -> - decode_incomplete2(Form,TagNo,V,Directives,Rest); - _ -> - %{asn1_DEFAULT,Bin} - asn1_NOVALUE - end; -decode_primitive_incomplete([[opt,TagNo]],Bin) -> %optional - case decode_tag_and_length(Bin) of - {Form,TagNo,V,Rest} -> - decode_incomplete2(Form,TagNo,V,[],Rest); - _ -> - %{{TagNo,asn1_NOVALUE},Bin} - asn1_NOVALUE - end; -decode_primitive_incomplete([[opt,TagNo,Directives]],Bin) -> %optional - case decode_tag_and_length(Bin) of - {Form,TagNo,V,Rest} -> - decode_incomplete2(Form,TagNo,V,Directives,Rest); - _ -> - %{{TagNo,asn1_NOVALUE},Bin} - asn1_NOVALUE - end; -%% An optional that shall be undecoded -decode_primitive_incomplete([[opt_undec,Tag]],Bin) -> - case decode_tag_and_length(Bin) of - {_,Tag,_,_} -> - decode_incomplete_bin(Bin); - _ -> - asn1_NOVALUE - end; -%% A choice alternative that shall be undecoded -decode_primitive_incomplete([[alt_undec,TagNo]|RestAlts],Bin) -> -% decode_incomplete_bin(Bin); -% case decode_tlv(Bin) of - case decode_tag_and_length(Bin) of -% {{_Form,TagNo,_Len,_V},_R} -> - {_,TagNo,_,_} -> - decode_incomplete_bin(Bin); - _ -> - decode_primitive_incomplete(RestAlts,Bin) - end; -decode_primitive_incomplete([[alt,TagNo]|RestAlts],Bin) -> - case decode_tag_and_length(Bin) of - {_Form,TagNo,V,Rest} -> - {{TagNo,V},Rest}; - _ -> - decode_primitive_incomplete(RestAlts,Bin) - end; -decode_primitive_incomplete([[alt,TagNo,Directives]|RestAlts],Bin) -> - case decode_tag_and_length(Bin) of - {Form,TagNo,V,Rest} -> - decode_incomplete2(Form,TagNo,V,Directives,Rest); - _ -> - decode_primitive_incomplete(RestAlts,Bin) - end; -decode_primitive_incomplete([[alt_parts,TagNo]],Bin) -> - case decode_tag_and_length(Bin) of - {_Form,TagNo,V,Rest} -> - {{TagNo,V},Rest}; - _ -> - asn1_NOVALUE - end; -decode_primitive_incomplete([[alt_parts,TagNo]|RestAlts],Bin) -> - case decode_tag_and_length(Bin) of - {_Form,TagNo,V,Rest} -> - {{TagNo,decode_parts_incomplete(V)},Rest}; - _ -> - decode_primitive_incomplete(RestAlts,Bin) - end; -decode_primitive_incomplete([[undec,_TagNo]|_RestTag],Bin) -> %incomlete decode - decode_incomplete_bin(Bin); -decode_primitive_incomplete([[parts,TagNo]|_RestTag],Bin) -> - case decode_tag_and_length(Bin) of - {_Form,TagNo,V,Rest} -> - {{TagNo,decode_parts_incomplete(V)},Rest}; - Err -> - {error,{asn1,"tag failure",TagNo,Err}} - end; -decode_primitive_incomplete([mandatory|RestTag],Bin) -> - {Form,TagNo,V,Rest} = decode_tag_and_length(Bin), - decode_incomplete2(Form,TagNo,V,RestTag,Rest); -%% A choice that is a toptype or a mandatory component of a -%% SEQUENCE or SET. -decode_primitive_incomplete([[mandatory|Directives]],Bin) -> - {Form,TagNo,V,Rest} = decode_tag_and_length(Bin), - decode_incomplete2(Form,TagNo,V,Directives,Rest); -decode_primitive_incomplete([],Bin) -> - decode_primitive(Bin). - -%% decode_parts_incomplete/1 receives a number of values encoded in -%% sequence and returns the parts as unencoded binaries -decode_parts_incomplete(<<>>) -> - []; -decode_parts_incomplete(Bin) -> - {ok,Rest} = skip_tag(Bin), - {ok,Rest2} = skip_length_and_value(Rest), - LenPart = size(Bin) - size(Rest2), - <<Part:LenPart/binary,RestBin/binary>> = Bin, - [Part|decode_parts_incomplete(RestBin)]. - - -%% decode_incomplete2 checks if V is a value of a constructed or -%% primitive type, and continues the decode propeerly. -decode_incomplete2(_Form=2,TagNo,V,TagMatch,_) -> - %% constructed indefinite length - {Vlist,Rest2} = decode_constr_indef_incomplete(TagMatch,V,[]), - {{TagNo,Vlist},Rest2}; -decode_incomplete2(1,TagNo,V,[TagMatch],Rest) when is_list(TagMatch) -> - {{TagNo,decode_constructed_incomplete(TagMatch,V)},Rest}; -decode_incomplete2(1,TagNo,V,TagMatch,Rest) -> - {{TagNo,decode_constructed_incomplete(TagMatch,V)},Rest}; -decode_incomplete2(0,TagNo,V,_TagMatch,Rest) -> - {{TagNo,V},Rest}. - -decode_constructed_incomplete([Tags=[Ts]],Bin) when is_list(Ts) -> - decode_constructed_incomplete(Tags,Bin); -decode_constructed_incomplete(_TagMatch,<<>>) -> - []; -decode_constructed_incomplete([mandatory|RestTag],Bin) -> - {Tlv,Rest} = decode_primitive(Bin), - [Tlv|decode_constructed_incomplete(RestTag,Rest)]; -decode_constructed_incomplete(Directives=[[Alt,_]|_],Bin) - when Alt == alt_undec; Alt == alt; Alt == alt_parts -> - {_Form,TagNo,V,Rest} = decode_tag_and_length(Bin), - case incomplete_choice_alt(TagNo,Directives) of - {alt_undec,_} -> - LenA = size(Bin)-size(Rest), - <<A:LenA/binary,Rest/binary>> = Bin, - A; - {alt,InnerDirectives} -> - {Tlv,Rest} = decode_primitive_incomplete(InnerDirectives,V), - {TagNo,Tlv}; - {alt_parts,_} -> - [{TagNo,decode_parts_incomplete(V)}]; - no_match -> %% if a choice alternative was encoded that - %% was not specified in the config file, - %% thus decode component anonomous. - {Tlv,_}=decode_primitive(Bin), - Tlv - end; -decode_constructed_incomplete([TagNo|RestTag],Bin) -> -%% {Tlv,Rest} = decode_primitive_incomplete([TagNo],Bin), - case decode_primitive_incomplete([TagNo],Bin) of - {Tlv,Rest} -> - [Tlv|decode_constructed_incomplete(RestTag,Rest)]; - asn1_NOVALUE -> - decode_constructed_incomplete(RestTag,Bin) - end; -decode_constructed_incomplete([],Bin) -> - {Tlv,Rest}=decode_primitive(Bin), - [Tlv|decode_constructed_incomplete([],Rest)]. - -decode_constr_indef_incomplete(_TagMatch,<<0,0,Rest/binary>>,Acc) -> - {lists:reverse(Acc),Rest}; -decode_constr_indef_incomplete([Tag|RestTags],Bin,Acc) -> -% {Tlv,Rest} = decode_primitive_incomplete([Tag],Bin), - case decode_primitive_incomplete([Tag],Bin) of - {Tlv,Rest} -> - decode_constr_indef_incomplete(RestTags,Rest,[Tlv|Acc]); - asn1_NOVALUE -> - decode_constr_indef_incomplete(RestTags,Bin,Acc) - end. - - -decode_incomplete_bin(Bin) -> - {ok,Rest} = skip_tag(Bin), - {ok,Rest2} = skip_length_and_value(Rest), - IncLen = size(Bin) - size(Rest2), - <<IncBin:IncLen/binary,Ret/binary>> = Bin, - {IncBin,Ret}. - -incomplete_choice_alt(TagNo,[[Alt,TagNo]|Directives]) -> - {Alt,Directives}; -incomplete_choice_alt(TagNo,[D]) when is_list(D) -> - incomplete_choice_alt(TagNo,D); -incomplete_choice_alt(TagNo,[_H|Directives]) -> - incomplete_choice_alt(TagNo,Directives); -incomplete_choice_alt(_,[]) -> - no_match. - - - - -%% decode_selective(Pattern, Binary) the first argument is a pattern that tells -%% what to do with the next element the second is the BER encoded -%% message as a binary -%% Returns {ok,Value} or {error,Reason} -%% Value is a binary that in turn must be decoded to get the decoded -%% value. -decode_selective([],Binary) -> - {ok,Binary}; -decode_selective([skip|RestPattern],Binary)-> - {ok,RestBinary}=skip_tag(Binary), - {ok,RestBinary2}=skip_length_and_value(RestBinary), - decode_selective(RestPattern,RestBinary2); -decode_selective([[skip_optional,Tag]|RestPattern],Binary) -> - case skip_optional_tag(Tag,Binary) of - {ok,RestBinary} -> - {ok,RestBinary2}=skip_length_and_value(RestBinary), - decode_selective(RestPattern,RestBinary2); - missing -> - decode_selective(RestPattern,Binary) - end; -decode_selective([[choosen,Tag]],Binary) -> - return_value(Tag,Binary); -% case skip_optional_tag(Tag,Binary) of %may be optional/default -% {ok,RestBinary} -> -% {ok,Value} = get_value(RestBinary); -% missing -> -% {ok,<<>>} -% end; -decode_selective([[choosen,Tag]|RestPattern],Binary) -> - case skip_optional_tag(Tag,Binary) of - {ok,RestBinary} -> - {ok,Value} = get_value(RestBinary), - decode_selective(RestPattern,Value); - missing -> - {ok,<<>>} - end; -decode_selective(P,_) -> - {error,{asn1,{partial_decode,"bad pattern",P}}}. - -return_value(Tag,Binary) -> - {ok,{Tag,RestBinary}}=get_tag(Binary), - {ok,{LenVal,_RestBinary2}} = get_length_and_value(RestBinary), - {ok,<<Tag/binary,LenVal/binary>>}. - - -%% skip_tag and skip_length_and_value are rutines used both by -%% decode_partial_incomplete and decode_selective (decode/2). - -skip_tag(<<_:3,31:5,Rest/binary>>)-> - skip_long_tag(Rest); -skip_tag(<<_:3,_Tag:5,Rest/binary>>) -> - {ok,Rest}. - -skip_long_tag(<<1:1,_:7,Rest/binary>>) -> - skip_long_tag(Rest); -skip_long_tag(<<0:1,_:7,Rest/binary>>) -> - {ok,Rest}. - -skip_optional_tag(<<>>,Binary) -> - {ok,Binary}; -skip_optional_tag(<<Tag,RestTag/binary>>,<<Tag,Rest/binary>>) -> - skip_optional_tag(RestTag,Rest); -skip_optional_tag(_,_) -> - missing. - - - - -skip_length_and_value(Binary) -> - case decode_length(Binary) of - {indefinite,RestBinary} -> - skip_indefinite_value(RestBinary); - {Length,RestBinary} -> - <<_:Length/unit:8,Rest/binary>> = RestBinary, - {ok,Rest} - end. - -skip_indefinite_value(<<0,0,Rest/binary>>) -> - {ok,Rest}; -skip_indefinite_value(Binary) -> - {ok,RestBinary}=skip_tag(Binary), - {ok,RestBinary2} = skip_length_and_value(RestBinary), - skip_indefinite_value(RestBinary2). - -get_value(Binary) -> - case decode_length(Binary) of - {indefinite,RestBinary} -> - get_indefinite_value(RestBinary,[]); - {Length,RestBinary} -> - <<Value:Length/binary,_Rest/binary>> = RestBinary, - {ok,Value} - end. - -get_indefinite_value(<<0,0,_Rest/binary>>,Acc) -> - {ok,list_to_binary(lists:reverse(Acc))}; -get_indefinite_value(Binary,Acc) -> - {ok,{Tag,RestBinary}}=get_tag(Binary), - {ok,{LenVal,RestBinary2}} = get_length_and_value(RestBinary), - get_indefinite_value(RestBinary2,[LenVal,Tag|Acc]). - -get_tag(<<H:1/binary,Rest/binary>>) -> - case H of - <<_:3,31:5>> -> - get_long_tag(Rest,[H]); - _ -> {ok,{H,Rest}} - end. -get_long_tag(<<H:1/binary,Rest/binary>>,Acc) -> - case H of - <<0:1,_:7>> -> - {ok,{list_to_binary(lists:reverse([H|Acc])),Rest}}; - _ -> - get_long_tag(Rest,[H|Acc]) - end. - -get_length_and_value(Bin = <<0:1,Length:7,_T/binary>>) -> - <<Len,Val:Length/binary,Rest/binary>> = Bin, - {ok,{<<Len,Val/binary>>, Rest}}; -get_length_and_value(Bin = <<1:1,0:7,_T/binary>>) -> - get_indefinite_length_and_value(Bin); -get_length_and_value(<<1:1,LL:7,T/binary>>) -> - <<Length:LL/unit:8,Rest/binary>> = T, - <<Value:Length/binary,Rest2/binary>> = Rest, - {ok,{<<1:1,LL:7,Length:LL/unit:8,Value/binary>>,Rest2}}. - -get_indefinite_length_and_value(<<H,T/binary>>) -> - get_indefinite_length_and_value(T,[H]). - -get_indefinite_length_and_value(<<0,0,Rest/binary>>,Acc) -> - {ok,{list_to_binary(lists:reverse(Acc)),Rest}}; -get_indefinite_length_and_value(Binary,Acc) -> - {ok,{Tag,RestBinary}}=get_tag(Binary), - {ok,{LenVal,RestBinary2}}=get_length_and_value(RestBinary), - get_indefinite_length_and_value(RestBinary2,[LenVal,Tag|Acc]). - - - - -%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% -%% match_tags takes a Tlv (Tag, Length, Value) structure and matches -%% it with the tags in TagList. If the tags does not match the function -%% crashes otherwise it returns the remaining Tlv after that the tags have -%% been removed. -%% -%% match_tags(Tlv, TagList) -%% - -match_tags({T,V},[T]) -> - V; -match_tags({T,V}, [T|Tt]) -> - match_tags(V,Tt); -match_tags([{T,V}],[T|Tt]) -> - match_tags(V, Tt); -match_tags(Vlist = [{T,_V}|_], [T]) -> - Vlist; -match_tags(Tlv, []) -> - Tlv; -match_tags(Tlv = {Tag,_V},[T|_Tt]) -> - exit({error,{asn1,{wrong_tag,{{expected,T},{got,Tag,Tlv}}}}}). - -%%% -%% skips components that do not match a tag in Tags -skip_ExtensionAdditions([],_Tags) -> - []; -skip_ExtensionAdditions(TLV=[{Tag,_}|Rest],Tags) -> - case [X||X=T<-Tags,T==Tag] of - [] -> - %% skip this TLV and continue with next - skip_ExtensionAdditions(Rest,Tags); - _ -> - TLV - end. - - -%%=============================================================================== -%%=============================================================================== -%%=============================================================================== -%% Optionals, preset not filled optionals with asn1_NOVALUE -%%=============================================================================== -%%=============================================================================== -%%=============================================================================== - -fixoptionals(OptList,Val) when is_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>>. - - -%%=============================================================================== -%% Decode a tag -%% -%% decode_tag(OctetListBuffer) -> {{Form, (Class bsl 16)+ TagNo}, RestOfBuffer, RemovedBytes} -%%=============================================================================== - -decode_tag_and_length(<<Class:2, Form:1, TagNo:5, 0:1, Length:7, V:Length/binary, RestBuffer/binary>>) when TagNo < 31 -> - {Form, (Class bsl 16) + TagNo, V, RestBuffer}; -decode_tag_and_length(<<Class:2, 1:1, TagNo:5, 1:1, 0:7, T/binary>>) when TagNo < 31 -> - {2, (Class bsl 16) + TagNo, T, <<>>}; -decode_tag_and_length(<<Class:2, Form:1, TagNo:5, 1:1, LL:7, Length:LL/unit:8,V:Length/binary, T/binary>>) when TagNo < 31 -> - {Form, (Class bsl 16) + TagNo, V, T}; -decode_tag_and_length(<<Class:2, Form:1, 31:5, 0:1, TagNo:7, 0:1, Length:7, V:Length/binary, RestBuffer/binary>>) -> - {Form, (Class bsl 16) + TagNo, V, RestBuffer}; -decode_tag_and_length(<<Class:2, 1:1, 31:5, 0:1, TagNo:7, 1:1, 0:7, T/binary>>) -> - {2, (Class bsl 16) + TagNo, T, <<>>}; -decode_tag_and_length(<<Class:2, Form:1, 31:5, 0:1, TagNo:7, 1:1, LL:7, Length:LL/unit:8, V:Length/binary, T/binary>>) -> - {Form, (Class bsl 16) + TagNo, V, T}; -decode_tag_and_length(<<Class:2, Form:1, 31:5, 1:1, TagPart1:7, 0:1, TagPartLast, Buffer/binary>>) -> - TagNo = (TagPart1 bsl 7) bor TagPartLast, - {Length, RestBuffer} = decode_length(Buffer), - << V:Length/binary, RestBuffer2/binary>> = RestBuffer, - {Form, (Class bsl 16) + TagNo, V, RestBuffer2}; -decode_tag_and_length(<<Class:2, Form:1, 31:5, Buffer/binary>>) -> - {TagNo, Buffer1} = decode_tag(Buffer, 0), - {Length, RestBuffer} = decode_length(Buffer1), - << V:Length/binary, RestBuffer2/binary>> = RestBuffer, - {Form, (Class bsl 16) + TagNo, V, RestBuffer2}. - - - -%% last partial tag -decode_tag(<<0:1,PartialTag:7, Buffer/binary>>, TagAck) -> - TagNo = (TagAck bsl 7) bor PartialTag, - %%<<TagNo>> = <<TagAck:1, PartialTag:7>>, - {TagNo, Buffer}; -% more tags -decode_tag(<<_:1,PartialTag:7, Buffer/binary>>, TagAck) -> - TagAck1 = (TagAck bsl 7) bor PartialTag, - %%<<TagAck1:16>> = <<TagAck:1, PartialTag:7,0:8>>, - decode_tag(Buffer, TagAck1). - - -%%======================================================================= -%% -%% Encode all tags in the list Tags and return a possibly deep list of -%% bytes with tag and length encoded -%% The taglist must be in reverse order (fixed by the asn1 compiler) -%% e.g [T1,T2] will result in -%% {[EncodedT2,EncodedT1|BytesSoFar],LenSoFar+LenT2+LenT1} -%% - -encode_tags([Tag|Trest], BytesSoFar, LenSoFar) -> -% remove {Bytes1,L1} = encode_one_tag(Tag), - {Bytes2,L2} = encode_length(LenSoFar), - encode_tags(Trest, [Tag,Bytes2|BytesSoFar], - LenSoFar + size(Tag) + L2); -encode_tags([], BytesSoFar, LenSoFar) -> - {BytesSoFar,LenSoFar}. - -encode_tags(TagIn, {BytesSoFar,LenSoFar}) -> - encode_tags(TagIn, BytesSoFar, LenSoFar). - -% 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)}. - - -%%=============================================================================== -%% -%% 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) -> io_list (i.e nested list with integers, binaries) -%% Value = list of bytes of an already encoded value (the list must be flat) -%% | binary - -%% -encode_open_type(Val) when is_list(Val) -> -% {Val,length(Val)}; - encode_open_type(list_to_binary(Val)); -encode_open_type(Val) -> - {Val, size(Val)}. - -%% -encode_open_type(Val, T) when is_list(Val) -> - encode_open_type(list_to_binary(Val),T); -encode_open_type(Val,[]) -> - {Val, size(Val)}; -encode_open_type(Val,Tag) -> - encode_tags(Tag,Val, size(Val)). - - -%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% -%% decode_open_type(Tlv, TagIn) -> Value -%% Tlv = {Tag,V} | V where V -> binary() -%% TagIn = [TagVal] where TagVal -> int() -%% Value = binary with decoded data (which must be decoded again as some type) -%% -decode_open_type(Tlv, TagIn) -> - decode_open_type(Tlv, TagIn, erlang). -decode_open_type(Tlv, TagIn, Method) -> - case match_tags(Tlv,TagIn) of - Bin when is_binary(Bin) -> - {InnerTlv,_} = decode(Bin,Method), - InnerTlv; - TlvBytes -> TlvBytes - end. - - -decode_open_type_as_binary(Tlv, TagIn) -> - decode_open_type_as_binary(Tlv, TagIn, erlang). -decode_open_type_as_binary(Tlv,TagIn, Method)-> - case match_tags(Tlv,TagIn) of - V when is_binary(V) -> - V; - [Tlv2] -> encode(Tlv2, Method); - Tlv2 -> encode(Tlv2, Method) - end. - -%%=============================================================================== -%%=============================================================================== -%%=============================================================================== -%% Boolean, ITU_T X.690 Chapter 8.2 -%%=============================================================================== -%%=============================================================================== -%%=============================================================================== - -%%=============================================================================== -%% encode_boolean(Integer, ReversedTagList) -> {[Octet],Len} -%%=============================================================================== - -encode_boolean({Name, Val}, TagIn) when is_atom(Name) -> - encode_boolean(Val, TagIn); -encode_boolean(true, TagIn) -> - encode_tags(TagIn, [16#FF],1); -encode_boolean(false, TagIn) -> - encode_tags(TagIn, [0],1); -encode_boolean(X,_) -> - exit({error,{asn1, {encode_boolean, X}}}). - - -%%=============================================================================== -%% decode_boolean(BuffList, HasTag, TotalLen) -> {true, Remain, RemovedBytes} | -%% {false, Remain, RemovedBytes} -%%=============================================================================== -decode_boolean(Tlv,TagIn) -> - Val = match_tags(Tlv, TagIn), - case Val of - <<0:8>> -> - false; - <<_:8>> -> - true; - _ -> - exit({error,{asn1, {decode_boolean, Val}}}) - end. - - -%%=========================================================================== -%% 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, Tag) when is_integer(Val) -> - encode_tags(Tag, encode_integer(C, Val)); -encode_integer(C,{Name,Val},Tag) when is_atom(Name) -> - encode_integer(C,Val,Tag); -encode_integer(_C, Val, _Tag) -> - exit({error,{asn1, {encode_integer, Val}}}). - - - -encode_integer(C, Val, NamedNumberList, Tag) when is_atom(Val) -> - case lists:keysearch(Val, 1, NamedNumberList) of - {value,{_, NewVal}} -> - encode_tags(Tag, encode_integer(C, NewVal)); - _ -> - exit({error,{asn1, {encode_integer_namednumber, Val}}}) - end; -encode_integer(C,{_Name,Val},NamedNumberList,Tag) -> - encode_integer(C,Val,NamedNumberList,Tag); -encode_integer(C, Val, _NamedNumberList, Tag) -> - encode_tags(Tag, encode_integer(C, Val)). - - -encode_integer(_, 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(Tlv,Range,NamedNumberList,TagIn) -> - V = match_tags(Tlv,TagIn), - Int = decode_integer(V), - range_check_integer(Int,Range), - number2name(Int,NamedNumberList). - -decode_integer(Tlv,Range,TagIn) -> - V = match_tags(Tlv, TagIn), - Int = decode_integer(V), - range_check_integer(Int,Range), - Int. - -%% decoding postitive integer values. -decode_integer(Bin = <<0:1,_:7,_/binary>>) -> - Len = size(Bin), -% <<Int:Len/unit:8,Buffer2/binary>> = Bin, - <<Int:Len/unit:8>> = Bin, - Int; -%% decoding negative integer values. -decode_integer(Bin = <<1:1,B2:7,Bs/binary>>) -> - Len = size(Bin), -% <<N:Len/unit:8,Buffer2/binary>> = <<B2,Bs/binary>>, - <<N:Len/unit:8>> = <<B2,Bs/binary>>, - Int = N - (1 bsl (8 * Len - 1)), - Int. - -range_check_integer(Int,Range) -> - case Range of - [] -> % No length constraint - Int; - {Lb,Ub} when Int >= Lb, Ub >= Int -> % variable length constraint - Int; - Int -> % fixed value constraint - Int; - {_,_} -> - exit({error,{asn1,{integer_range,Range,Int}}}); - SingleValue when is_integer(SingleValue) -> - exit({error,{asn1,{integer_range,Range,Int}}}); - _ -> % some strange constraint that we don't support yet - Int - end. - -number2name(Int,[]) -> - Int; -number2name(Int,NamedNumberList) -> - case lists:keysearch(Int, 2, NamedNumberList) of - {value,{NamedVal, _}} -> - NamedVal; - _ -> - Int - end. - - -%%============================================================================ -%% Enumerated value, ITU_T X.690 Chapter 8.4 - -%% encode enumerated value -%%============================================================================ -encode_enumerated(Val, TagIn) when is_integer(Val)-> - encode_tags(TagIn, encode_integer(false,Val)); -encode_enumerated({Name,Val}, TagIn) when is_atom(Name) -> - encode_enumerated(Val, TagIn). - -%% 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}, TagIn) when is_atom(Val) -> - case catch encode_enumerated(C, Val, NamedNumberList, TagIn) of - {'EXIT',_} -> encode_enumerated(C, Val, ExtList, TagIn); - Result -> Result - end; - -encode_enumerated(C, Val, NamedNumberList, TagIn) when is_atom(Val) -> - case lists:keysearch(Val, 1, NamedNumberList) of - {value, {_, NewVal}} -> - encode_tags(TagIn, encode_integer(C, NewVal)); - _ -> - exit({error,{asn1, {enumerated_not_in_range, Val}}}) - end; - -encode_enumerated(C, {asn1_enum, Val}, {_,_}, TagIn) when is_integer(Val) -> - encode_tags(TagIn, encode_integer(C,Val)); - -encode_enumerated(C, {Name,Val}, NamedNumberList, TagIn) when is_atom(Name) -> - encode_enumerated(C, Val, NamedNumberList, TagIn); - -encode_enumerated(_C, Val, _NamedNumberList, _TagIn) -> - exit({error,{asn1, {enumerated_not_namednumber, Val}}}). - - - -%%============================================================================ -%% decode enumerated value -%% (Buffer, Range, NamedNumberList, HasTag, TotalLen) -> Value -%%=========================================================================== -decode_enumerated(Tlv, Range, NamedNumberList, Tags) -> - Buffer = match_tags(Tlv,Tags), - decode_enumerated_notag(Buffer, Range, NamedNumberList, Tags). - -decode_enumerated_notag(Buffer, _Range, {NamedNumberList,ExtList}, _Tags) -> - - IVal = decode_integer2(size(Buffer), Buffer), - case decode_enumerated1(IVal, NamedNumberList) of - {asn1_enum,IVal} -> - decode_enumerated1(IVal,ExtList); - EVal -> - EVal - end; -decode_enumerated_notag(Buffer, _Range, NNList, _Tags) -> - IVal = decode_integer2(size(Buffer), Buffer), - case decode_enumerated1(IVal, NNList) of - {asn1_enum,_} -> - exit({error,{asn1, {illegal_enumerated, IVal}}}); - EVal -> - EVal - 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(_C,0, TagIn) -> - encode_tags(TagIn, {[],0}); -encode_real(_C,'PLUS-INFINITY', TagIn) -> - encode_tags(TagIn, {[64],1}); -encode_real(_C,'MINUS-INFINITY', TagIn) -> - encode_tags(TagIn, {[65],1}); -encode_real(C,Val, TagIn) when is_tuple(Val); is_list(Val) -> - encode_tags(TagIn, encode_real(C,Val)). - - - -encode_real(C,Val) -> - asn1rt_ber_bin:encode_real(C,Val). - - -%%============================================================================ -%% decode real value -%% -%% decode_real([OctetBufferList], tuple|value, tag|notag) -> -%% {{Mantissa, Base, Exp} | realval | PLUS-INFINITY | MINUS-INFINITY | 0, -%% RestBuff} -%% -%% only for base 2 and 10 decoding sofar!! -%%============================================================================ - -decode_real(Tlv, Tags) -> - Buffer = match_tags(Tlv,Tags), - decode_real_notag(Buffer). - -decode_real_notag(Buffer) -> - Len = - case Buffer of - Bin when is_binary(Bin) -> - size(Bin); - {_T,_V} -> - exit({error,{asn1,{real_not_in_primitive_form,Buffer}}}) - end, - {Val,_Rest,Len} = asn1rt_ber_bin:decode_real(Buffer,Len), - Val. -%% exit({error,{asn1, {unimplemented,real}}}). -%% decode_real2(Buffer, Form, size(Buffer)). - -% decode_real2(Buffer, Form, Len) -> -% <<First, Buffer2/binary>> = Buffer, -% 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, - -% {FirstLen,Exp,Buffer3} = -% case B1_0 of -% 0 -> -% <<_:1/unit:8,Buffer21/binary>> = Buffer2, -% {2, decode_integer2(1, Buffer2),Buffer21}; -% 1 -> -% <<_:2/unit:8,Buffer21/binary>> = Buffer2, -% {3, decode_integer2(2, Buffer2)}; -% 2 -> -% <<_:3/unit:8,Buffer21/binary>> = Buffer2, -% {4, decode_integer2(3, Buffer2)}; -% 3 -> -% <<ExpLen1,RestBuffer/binary>> = Buffer2, -% <<_:ExpLen1/unit:8,RestBuffer2/binary>> = RestBuffer, -% { ExpLen1 + 2, -% decode_integer2(ExpLen1, RestBuffer, RemBytes1), -% RestBuffer2} -% end, -% Length = Len - FirstLen, -% <<LongInt:Length/unit:8,RestBuff/binary>> = Buffer3, -% {Mantissa, Buffer4} = -% if Sign =:= 0 -> - -% {LongInt, RestBuff};% sign plus, -% true -> - -% {-LongInt, RestBuff}% sign minus -% end, -% 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,TagIn) when is_integer(Unused), is_binary(BinBits) -> - encode_bin_bit_string(C,Bin,NamedBitList,TagIn); -encode_bit_string(C, [FirstVal | RestVal], NamedBitList, TagIn) when is_atom(FirstVal) -> - encode_bit_string_named(C, [FirstVal | RestVal], NamedBitList, TagIn); - -encode_bit_string(C, [{bit,X} | RestVal], NamedBitList, TagIn) -> - encode_bit_string_named(C, [{bit,X} | RestVal], NamedBitList, TagIn); - -encode_bit_string(C, [FirstVal| RestVal], NamedBitList, TagIn) when is_integer(FirstVal) -> - encode_bit_string_bits(C, [FirstVal | RestVal], NamedBitList, TagIn); - -encode_bit_string(_C, 0, _NamedBitList, TagIn) -> - encode_tags(TagIn, <<0>>,1); - -encode_bit_string(_C, [], _NamedBitList, TagIn) -> - encode_tags(TagIn, <<0>>,1); - -encode_bit_string(C, IntegerVal, NamedBitList, TagIn) when is_integer(IntegerVal) -> - BitListVal = int_to_bitlist(IntegerVal), - encode_bit_string_bits(C, BitListVal, NamedBitList, TagIn); - -encode_bit_string(C, {Name,BitList}, NamedBitList, TagIn) when is_atom(Name) -> - encode_bit_string(C, BitList, NamedBitList, TagIn). - - - -int_to_bitlist(0) -> - []; -int_to_bitlist(Int) when is_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,TagIn)-> - case get_constraint(C,'SizeConstraint') of - no -> - remove_unused_then_dotag(TagIn, 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(TagIn, Unused, BinBits) - end; - Size -> - case ((size(BinBits)*8)-Unused) of - BBSize when BBSize =< Size -> - remove_unused_then_dotag(TagIn, Unused, BinBits); - BBSize -> - exit({error,{asn1, - {bitstring_length, - {{was,BBSize},{should_be,Size}}}}}) - end - end. - -remove_unused_then_dotag(TagIn,Unused,BinBits) -> - case Unused of - 0 when (size(BinBits) == 0) -> - encode_tags(TagIn,<<0>>,1); - 0 -> - Bin = <<Unused,BinBits/binary>>, - encode_tags(TagIn,Bin,size(Bin)); - Num -> - N = (size(BinBits)-1), - <<BBits:N/binary,LastByte>> = BinBits, - encode_tags(TagIn, - [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, TagIn) -> - ToSetPos = get_all_bitposes([FirstVal | RestVal], NamedBitList, []), - Size = - case get_constraint(C,'SizeConstraint') of - no -> - lists:max(ToSetPos)+1; - {_Min,Max} -> - Max; - TSize -> - TSize - end, - BitList = make_and_set_list(Size, ToSetPos, 0), - {Len, Unused, OctetList} = encode_bitstring(BitList), - encode_tags(TagIn, [Unused|OctetList],Len+1). - - -%%---------------------------------------- -%% 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 is_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, TagIn) when is_list(BitListVal) -> - case get_constraint(C,'SizeConstraint') of - no -> - {Len, Unused, OctetList} = encode_bitstring(BitListVal), - %%add unused byte to the Len - encode_tags(TagIn, [Unused | OctetList], Len+1); - Constr={Min,_Max} when is_integer(Min) -> - %% Max may be an integer or 'MAX' - encode_constr_bit_str_bits(Constr,BitListVal,TagIn); - {Constr={_,_},[]} ->%Constr={Min,Max} - %% constraint with extension mark - encode_constr_bit_str_bits(Constr,BitListVal,TagIn); - Constr={{_,_},{_,_}} ->%{{Min1,Max1},{Min2,Max2}} - %% constraint with extension mark - encode_constr_bit_str_bits(Constr,BitListVal,TagIn); - Size -> - case length(BitListVal) of - BitSize when BitSize == Size -> - {Len, Unused, OctetList} = encode_bitstring(BitListVal), - %%add unused byte to the Len - encode_tags(TagIn, [Unused | OctetList], Len+1); - BitSize when BitSize < Size -> - PaddedList = pad_bit_list(Size-BitSize,BitListVal), - {Len, Unused, OctetList} = encode_bitstring(PaddedList), - %%add unused byte to the Len - encode_tags(TagIn, [Unused | OctetList], Len+1); - BitSize -> - exit({error,{asn1, - {bitstring_length, {{was,BitSize},{should_be,Size}}}}}) - end - - end. - -encode_constr_bit_str_bits({{_Min1,Max1},{Min2,Max2}},BitListVal,TagIn) -> - 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}}}}}); - _ -> - {Len, Unused, OctetList} = encode_bitstring(BitListVal), - %%add unused byte to the Len - encode_tags(TagIn, [Unused, OctetList], Len+1) - end; -encode_constr_bit_str_bits({Min,Max},BitListVal,TagIn) -> - BitLen = length(BitListVal), - if - BitLen > Max -> - exit({error,{asn1,{bitstring_length,{{was,BitLen}, - {maximum,Max}}}}}); - BitLen < Min -> - exit({error,{asn1,{bitstring_length,{{was,BitLen}, - {minimum,Max}}}}}); - true -> - {Len, Unused, OctetList} = encode_bitstring(BitListVal), - %%add unused byte to the Len - encode_tags(TagIn, [Unused, OctetList], Len+1) - 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) -> -% NewTags = new_tags(HasTag,#tag{class=?UNIVERSAL,number=?N_BIT_STRING}), - decode_restricted_string(Buffer, Range, ?N_BIT_STRING, Tags, - NamedNumberList,bin). - -decode_bit_string(Buffer, Range, NamedNumberList, Tags) -> -% NewTags = new_tags(HasTag,#tag{class=?UNIVERSAL,number=?N_BIT_STRING}), - decode_restricted_string(Buffer, Range, ?N_BIT_STRING, Tags, - NamedNumberList,old). - - -decode_bit_string2(<<0>>,_NamedNumberList,BinOrOld) -> - case BinOrOld of - bin -> - {0,<<>>}; - _ -> - [] - end; -decode_bit_string2(<<Unused,Bits/binary>>,NamedNumberList,BinOrOld) -> - case NamedNumberList of - [] -> - case BinOrOld of - bin -> - {Unused,Bits}; - _ -> - decode_bitstring2(size(Bits), Unused, Bits) - end; - _ -> - BitString = decode_bitstring2(size(Bits), Unused, Bits), - decode_bitstring_NNL(BitString,NamedNumberList) - 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, TagIn) when is_binary(OctetList) -> - encode_tags(TagIn, OctetList, size(OctetList)); -encode_octet_string(_C, OctetList, TagIn) when is_list(OctetList) -> - encode_tags(TagIn, OctetList, length(OctetList)); -encode_octet_string(C, {Name,OctetList}, TagIn) when is_atom(Name) -> - encode_octet_string(C, OctetList, TagIn). - - -%%============================================================================ -%% decode octet string -%% (Buffer, Range, HasTag, TotalLen) -> {String, Remain, RemovedBytes} -%% -%% Octet string is decoded as a restricted string -%%============================================================================ -decode_octet_string(Buffer, Range, Tags) -> -% NewTags = new_tags(HasTag,#tag{class=?UNIVERSAL,number=?N_OCTET_STRING}), - decode_restricted_string(Buffer, Range, ?N_OCTET_STRING, - Tags, [], old). - -%%============================================================================ -%% Null value, ITU_T X.690 Chapter 8.8 -%% -%% encode NULL value -%%============================================================================ - -encode_null({Name, _Val}, TagIn) when is_atom(Name) -> - encode_tags(TagIn, [], 0); -encode_null(_Val, TagIn) -> - encode_tags(TagIn, [], 0). - -%%============================================================================ -%% decode NULL value -%% (Buffer, HasTag, TotalLen) -> {NULL, Remain, RemovedBytes} -%%============================================================================ - -decode_null(Tlv, Tags) -> - Val = match_tags(Tlv, Tags), - case Val of - <<>> -> - 'NULL'; - _ -> - exit({error,{asn1,{decode_null,Val}}}) - end. - -%%============================================================================ -%% Object identifier, ITU_T X.690 Chapter 8.19 -%% -%% encode Object Identifier value -%%============================================================================ - -encode_object_identifier({Name,Val}, TagIn) when is_atom(Name) -> - encode_object_identifier(Val, TagIn); -encode_object_identifier(Val, TagIn) -> - encode_tags(TagIn, e_object_identifier(Val)). - -e_object_identifier({'OBJECT IDENTIFIER', V}) -> - e_object_identifier(V); -e_object_identifier({Cname, V}) when is_atom(Cname), is_tuple(V) -> - e_object_identifier(tuple_to_list(V)); -e_object_identifier({Cname, V}) when is_atom(Cname), is_list(V) -> - e_object_identifier(V); -e_object_identifier(V) when is_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} = lists:mapfoldl(fun enc_obj_id_tail/2,0,Tail), - {[H|R], Lh+Lr}. - -enc_obj_id_tail(H, Len) -> - {B, L} = mk_object_val(H), - {B,Len+L}. - - -%%%%%%%%%%% -%% 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(Tlv, Tags) -> - Val = match_tags(Tlv, Tags), - [AddedObjVal|ObjVals] = dec_subidentifiers(Val,0,[]), - {Val1, Val2} = if - AddedObjVal < 40 -> - {0, AddedObjVal}; - AddedObjVal < 80 -> - {1, AddedObjVal - 40}; - true -> - {2, AddedObjVal - 80} - end, - list_to_tuple([Val1, Val2 | ObjVals]). - -dec_subidentifiers(<<>>,_Av,Al) -> - lists:reverse(Al); -dec_subidentifiers(<<1:1,H:7,T/binary>>,Av,Al) -> - dec_subidentifiers(T,(Av bsl 7) + H,Al); -dec_subidentifiers(<<H,T/binary>>,Av,Al) -> - dec_subidentifiers(T,0,[((Av bsl 7) + H)|Al]). - -%%============================================================================ -%% RELATIVE-OID, ITU_T X.690 Chapter 8.20 -%% -%% encode Relative Object Identifier -%%============================================================================ -encode_relative_oid({Name,Val},TagIn) when is_atom(Name) -> - encode_relative_oid(Val,TagIn); -encode_relative_oid(Val,TagIn) when is_tuple(Val) -> - encode_relative_oid(tuple_to_list(Val),TagIn); -encode_relative_oid(Val,TagIn) -> - encode_tags(TagIn, enc_relative_oid(Val)). - -enc_relative_oid(Tuple) when is_tuple(Tuple) -> - enc_relative_oid(tuple_to_list(Tuple)); -enc_relative_oid(Val) -> - lists:mapfoldl(fun(X,AccIn) -> - {SO,L}=mk_object_val(X), - {SO,L+AccIn} - end - ,0,Val). - -%%============================================================================ -%% decode Relative Object Identifier value -%% (Buffer, HasTag, TotalLen) -> {{ObjId}, Remain, RemovedBytes} -%%============================================================================ -decode_relative_oid(Tlv, Tags) -> - Val = match_tags(Tlv, Tags), - ObjVals = dec_subidentifiers(Val,0,[]), - list_to_tuple(ObjVals). - -%%============================================================================ -%% Restricted character string types, ITU_T X.690 Chapter 8.20 -%% -%% encode Numeric Printable Teletex Videotex Visible IA5 Graphic General strings -%%============================================================================ -%% The StringType arg is kept for future use but might be removed -encode_restricted_string(_C, OctetList, _StringType, TagIn) - when is_binary(OctetList) -> - encode_tags(TagIn, OctetList, size(OctetList)); -encode_restricted_string(_C, OctetList, _StringType, TagIn) - when is_list(OctetList) -> - encode_tags(TagIn, OctetList, length(OctetList)); -encode_restricted_string(C,{Name,OctetL}, StringType, TagIn) when is_atom(Name)-> - encode_restricted_string(C, OctetL, StringType, TagIn). - -%%============================================================================ -%% 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) -> - decode_restricted_string(Buffer, Range, StringType, Tags, [], old). - - -decode_restricted_string(Tlv, Range, StringType, TagsIn, - NamedNumberList, BinOrOld) -> - Val = match_tags(Tlv, TagsIn), - Val2 = - case Val of - PartList = [_H|_T] -> % constructed val - Bin = collect_parts(PartList), - decode_restricted(Bin, StringType, - NamedNumberList, BinOrOld); - Bin -> - decode_restricted(Bin, StringType, - NamedNumberList, BinOrOld) - end, - check_and_convert_restricted_string(Val2,StringType,Range,NamedNumberList,BinOrOld). - - - -% case StringType of -% ?N_BIT_STRING when BinOrOld == bin -> -% {concat_bit_binaries(AccVal, Val), AccRb+Rb}; -% _ when is_binary(Val),is_binary(AccVal) -> -% {<<AccVal/binary,Val/binary>>,AccRb+Rb}; -% _ when is_binary(Val), AccVal==[] -> -% {Val,AccRb+Rb}; -% _ -> -% {AccVal++Val, AccRb+Rb} -% end, - - - -decode_restricted(Bin, StringType, NamedNumberList,BinOrOld) -> - case StringType of - ?N_BIT_STRING -> - decode_bit_string2(Bin, NamedNumberList, BinOrOld); - ?N_UniversalString -> - mk_universal_string(binary_to_list(Bin)); - ?N_BMPString -> - mk_BMP_string(binary_to_list(Bin)); - _ -> - Bin - end. - - -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 is_list(Val) -> - {length(Val),Val}; - ?N_BIT_STRING when is_tuple(Val) -> - {(size(element(2,Val))*8) - element(1,Val),Val}; - _ when is_binary(Val) -> - {size(Val),binary_to_list(Val)}; - _ when is_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; - {{Lb,_Ub},_Ext=[Min|_]} when StrLen >= Lb; StrLen >= Min -> - 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 is_integer(_Len) -> - exit({error,{asn1,{length,Range,Val}}}); - _ -> % some strange constraint that we don't support yet - NewVal - end. - - -%%============================================================================ -%% encode Universal string -%%============================================================================ - -encode_universal_string(C, {Name, Universal}, TagIn) when is_atom(Name) -> - encode_universal_string(C, Universal, TagIn); -encode_universal_string(_C, Universal, TagIn) -> - OctetList = mk_uni_list(Universal), - encode_tags(TagIn, 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) -> - decode_restricted_string(Buffer, Range, ?N_UniversalString, - Tags, [], 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 UTF8 string -%%============================================================================ - -encode_UTF8_string(_C,UTF8String,TagIn) when is_binary(UTF8String) -> - encode_tags(TagIn, UTF8String, size(UTF8String)); -encode_UTF8_string(_C,UTF8String,TagIn) -> - encode_tags(TagIn, UTF8String, length(UTF8String)). - - -%%============================================================================ -%% decode UTF8 string -%%============================================================================ - -decode_UTF8_string(Tlv,TagsIn) -> - Val = match_tags(Tlv, TagsIn), - case Val of - PartList = [_H|_T] -> % constructed val - collect_parts(PartList); - Bin -> - Bin - end. - - -%%============================================================================ -%% encode BMP string -%%============================================================================ - -encode_BMP_string(C, {Name,BMPString}, TagIn) when is_atom(Name)-> - encode_BMP_string(C, BMPString, TagIn); -encode_BMP_string(_C, BMPString, TagIn) -> - OctetList = mk_BMP_list(BMPString), - encode_tags(TagIn, 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) -> - decode_restricted_string(Buffer, Range, ?N_BMPString, - Tags, [], 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}, TagIn) when is_atom(Name) -> - encode_generalized_time(C, OctetList, TagIn); -encode_generalized_time(_C, OctetList, TagIn) -> - encode_tags(TagIn, OctetList, length(OctetList)). - -%%============================================================================ -%% decode Generalized time -%% (Buffer, Range, HasTag, TotalLen) -> {String, Remain, RemovedBytes} -%%============================================================================ - -decode_generalized_time(Tlv, _Range, Tags) -> - Val = match_tags(Tlv, Tags), - NewVal = case Val of - PartList = [_H|_T] -> % constructed - collect_parts(PartList); - Bin -> - Bin - end, - binary_to_list(NewVal). - -%%============================================================================ -%% Universal time, ITU_T X.680 Chapter 40 -%% -%% encode UTC time -%%============================================================================ - -encode_utc_time(C, {Name,OctetList}, TagIn) when is_atom(Name) -> - encode_utc_time(C, OctetList, TagIn); -encode_utc_time(_C, OctetList, TagIn) -> - encode_tags(TagIn, OctetList, length(OctetList)). - -%%============================================================================ -%% decode UTC time -%% (Buffer, Range, HasTag, TotalLen) -> {String, Remain, RemovedBytes} -%%============================================================================ - -decode_utc_time(Tlv, _Range, Tags) -> - Val = match_tags(Tlv, Tags), - NewVal = case Val of - PartList = [_H|_T] -> % constructed - collect_parts(PartList); - Bin -> - Bin - end, - binary_to_list(NewVal). - - -%%============================================================================ -%% 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}; -decode_length(<<0:1,Length:7,T/binary>>) -> - {Length,T}; -decode_length(<<1:1,LL:7,T/binary>>) -> - <<Length:LL/unit:8,Rest/binary>> = T, - {Length,Rest}. - - - -%%------------------------------------------------------------------------- -%% INTERNAL HELPER FUNCTIONS (not exported) -%%------------------------------------------------------------------------- - - -%% decoding postitive integer values. -decode_integer2(Len,Bin = <<0:1,_:7,_Bs/binary>>) -> - <<Int:Len/unit:8>> = Bin, - Int; -%% decoding negative integer values. -decode_integer2(Len,<<1:1,B2:7,Bs/binary>>) -> - <<N:Len/unit:8>> = <<B2,Bs/binary>>, - Int = N - (1 bsl (8 * Len - 1)), - Int. - -get_constraint(C,Key) -> - case lists:keysearch(Key,1,C) of - false -> - no; - {value,{_,V}} -> - V - end. - -collect_parts(TlvList) -> - collect_parts(TlvList,[]). - -collect_parts([{_,L}|Rest],Acc) when is_list(L) -> - collect_parts(Rest,[collect_parts(L)|Acc]); -collect_parts([{?N_BIT_STRING,<<Unused,Bits/binary>>}|Rest],_Acc) -> - collect_parts_bit(Rest,[Bits],Unused); -collect_parts([{_T,V}|Rest],Acc) -> - collect_parts(Rest,[V|Acc]); -collect_parts([],Acc) -> - list_to_binary(lists:reverse(Acc)). - -collect_parts_bit([{?N_BIT_STRING,<<Unused,Bits/binary>>}|Rest],Acc,Uacc) -> - collect_parts_bit(Rest,[Bits|Acc],Unused+Uacc); -collect_parts_bit([],Acc,Uacc) -> - list_to_binary([Uacc|lists:reverse(Acc)]). - - - - - - - - - - - - - - - - - - - - |