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-rw-r--r--lib/asn1/src/asn1rt_ber_bin.erl525
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diff --git a/lib/asn1/src/asn1rt_ber_bin.erl b/lib/asn1/src/asn1rt_ber_bin.erl
deleted file mode 100644
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--- a/lib/asn1/src/asn1rt_ber_bin.erl
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@@ -1,525 +0,0 @@
-%%
-%% %CopyrightBegin%
-%%
-%% Copyright Ericsson AB 2000-2010. 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).
-
--export([decode_length/1,
- encode_real/2, encode_real/3,
- decode_real/2, decode_real/4,
- decode_tag/1]).
-
--include("asn1_records.hrl").
-
-%% the encoding of class of tag bits 8 and 7
--define(UNIVERSAL, 0).
-
-%%% primitive or constructed encoding % bit 6
--define(PRIMITIVE, 0).
--define(CONSTRUCTED, 2#00100000).
-
-%%% The tag-number for universal types
--define(N_REAL, 9).
-
-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) -> {{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.
-
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-%% This function is called from generated code
-
-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 is_binary(Bin) ->
- {Bin,byte_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)}.
-
-%%============================================================================
-%%
-%% Real value, ITU_T X.690 Chapter 8.5
-%%============================================================================
-%%
-%% encode real value
-%%============================================================================
-
-%% only base 2 internally so far!!
-encode_real(_C,0, DoTag) ->
- dotag(DoTag, ?N_REAL, {[],0});
-encode_real(_C,'PLUS-INFINITY', DoTag) ->
- dotag(DoTag, ?N_REAL, {[64],1});
-encode_real(_C,'MINUS-INFINITY', DoTag) ->
- dotag(DoTag, ?N_REAL, {[65],1});
-encode_real(C,Val, DoTag) when is_tuple(Val); is_list(Val) ->
- dotag(DoTag, ?N_REAL, encode_real(C,Val)).
-
-%%%%%%%%%%%%%%
-%% only base 2 encoding!
-%% binary encoding:
-%% +------------+ +------------+ +-+-+-+-+---+---+
-%% | (tag)9 | | n + p + 1 | |1|S|BB |FF |EE |
-%% +------------+ +------------+ +-+-+-+-+---+---+
-%%
-%% +------------+ +------------+
-%% | | | |
-%% +------------+ ...+------------+
-%% n octets for exponent
-%%
-%% +------------+ +------------+
-%% | | | |
-%% +------------+ ...+------------+
-%% p octets for pos mantissa
-%%
-%% S is 0 for positive sign
-%% 1 for negative sign
-%% BB: encoding base, 00 = 2, (01 = 8, 10 = 16)
-%% 01 and 10 not used
-%% FF: scale factor 00 = 0 (used in base 2 encoding)
-%% EE: encoding of the exponent:
-%% 00 - on the following octet
-%% 01 - on the 2 following octets
-%% 10 - on the 3 following octets
-%% 11 - encoding of the length of the two's-complement encoding of
-%% exponent on the following octet, and two's-complement
-%% encoding of exponent on the other octets.
-%%
-%% In DER and base 2 encoding the mantissa is encoded as value 0 or
-%% bit shifted until it is an odd number. Thus, do this for BER as
-%% well.
-%% This interface also used by RT_COMMON
-encode_real(_C,{Mantissa, Base, Exponent}) when Base =:= 2 ->
-%% io:format("Mantissa: ~w Base: ~w, Exp: ~w~n",[Man, Base, Exp]),
- {Man,ExpAdd} = truncate_zeros(Mantissa), %% DER adjustment
- Exp = Exponent + ExpAdd,
- 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]),
- SFactor = 0,
- 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,
- BB = 0, %% 00 for base 2
- FirstOctet = <<1:1,SignBit:1,BB: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(C,{Mantissa,Base,Exponent})
- when Base =:= 10, is_integer(Mantissa), is_integer(Exponent) ->
- %% always encode as NR3 due to DER on the format
- %% mmmm.Eseeee where
- %% m := digit
- %% s := '-' | '+' | []
- %% '+' only allowed in +0
- %% e := digit
- %% ex: 1234.E-5679
-%% {Man,AddExp} = truncate_zeros(Mantissa,0),
-%% ManNum = trunc(Mantissa),
-%% {TruncatedMan,NumZeros} = truncate_zeros10(Mantissa),
- ManStr = integer_to_list(Mantissa),
-
- encode_real_as_string(C,ManStr,Exponent);
-encode_real(_C,{_,Base,_}) ->
- exit({error,{asn1, {encode_real_non_supported_encodeing, Base}}});
-%% base 10
-encode_real(C,Real) when is_list(Real) ->
- %% The Real string may come in as a NR1, NR2 or NR3 string.
- {Mantissa, Exponent} =
- case string:tokens(Real,"Ee") of
- [NR2] ->
- {NR2,0};
- [NR3MB,NR3E] ->
- %% remove beginning zeros
- {NR3MB,list_to_integer(NR3E)}
- end,
-
- %% .Decimal | Number | Number.Decimal
- ZeroDecimal =
- fun("0") -> "";
- (L) -> L
- end,
- {NewMantissa,LenDecimal} =
- case Mantissa of
- [$.|Dec] ->
- NewMan = remove_trailing_zeros(Dec),
- {NewMan,length(ZeroDecimal(NewMan))};
- _ ->
- case string:tokens(Mantissa,",.") of
- [Num] -> %% No decimal-mark
- {integer_to_list(list_to_integer(Num)),0};
- [Num,Dec] ->
- NewDec = ZeroDecimal(remove_trailing_zeros(Dec)),
- NewMan = integer_to_list(list_to_integer(Num)) ++ NewDec,
- {integer_to_list(list_to_integer(NewMan)),
- length(NewDec)}
- end
- end,
-
-% DER_Exponent = integer_to_list(Exponent - ExpReduce),
- encode_real_as_string(C,NewMantissa,Exponent - LenDecimal).
-
-encode_real_as_string(_C,Mantissa,Exponent)
- when is_list(Mantissa), is_integer(Exponent) ->
- %% Remove trailing zeros in Mantissa and add this to Exponent
- TruncMant = remove_trailing_zeros(Mantissa),
-
- ExpIncr = length(Mantissa) - length(TruncMant),
-
- ExpStr = integer_to_list(Exponent + ExpIncr),
-
- ExpBin =
- case ExpStr of
- "0" ->
- <<"E+0">>;
- _ ->
- ExpB = list_to_binary(ExpStr),
- <<$E,ExpB/binary>>
- end,
- ManBin = list_to_binary(TruncMant),
- NR3 = 3,
- {<<NR3,ManBin/binary,$.,ExpBin/binary>>,2 + size(ManBin) + size(ExpBin)}.
-
-remove_trailing_zeros(IntStr) ->
- case lists:dropwhile(fun($0)-> true;
- (_) -> false
- end, lists:reverse(IntStr)) of
- [] ->
- "0";
- ReversedIntStr ->
- lists:reverse(ReversedIntStr)
- end.
-
-truncate_zeros(Num) ->
- truncate_zeros(Num,0).
-truncate_zeros(0,Sum) ->
- {0,Sum};
-truncate_zeros(M,Sum) ->
- case M band 16#f =:= M band 16#e of
- true -> truncate_zeros(M bsr 1,Sum+1);
- _ -> {M,Sum}
- 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, C, Tags, OptOrMand) ->
- NewTags = new_tags(Tags,#tag{class=?UNIVERSAL,number=?N_REAL}),
- decode_real_notag(Buffer, C, NewTags, OptOrMand).
-
-%% This interface used by RT_COMMON
-decode_real(Buffer,Len) ->
- decode_real2(Buffer,[],Len,0).
-
-decode_real_notag(Buffer, C, Tags, OptOrMand) ->
- {_RestTags, {{_,Len}, Buffer0, Rb0}} =
- check_tags_i(Tags, Buffer, OptOrMand),
- decode_real2(Buffer0, C, Len, Rb0).
-
-decode_real2(Buffer, _C, 0, _RemBytes) ->
- {0,Buffer};
-decode_real2(Buffer0, _C, Len, RemBytes1) ->
- <<First, Buffer2/binary>> = Buffer0,
- if
- First =:= 2#01000000 -> {'PLUS-INFINITY', Buffer2};
- First =:= 2#01000001 -> {'MINUS-INFINITY', Buffer2};
-%% First =:= 2#00000000 -> {0, Buffer2};
- First =:= 1 orelse First =:= 2 orelse First =:= 3 ->
- %% charcter string encoding of base 10
- {NRx,Rest} = split_binary(Buffer2,Len-1),
- {binary_to_list(NRx),Rest,Len};
- true ->
- %% have some check here to verify only supported bases (2)
- %% not base 8 or 16
- <<_B7:1,Sign:1,BB:2,_FF:2,EE:2>> = <<First>>,
- Base =
- case BB of
- 0 -> 2; % base 2, only one so far
- _ -> exit({error,{asn1, {non_supported_base, BB}}})
- end,
- {FirstLen, {Exp, Buffer3,_Rb2}, RemBytes2} =
- case EE 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",
-
- 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,
- {{Mantissa, Base, Exp}, Buffer4, RemBytes2+RemBytes3}
- end.
-
-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]).
-
-
-%%%%%%%%%%%
-%% 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).
-
-
-%%============================================================================
-%% Length handling
-%%
-%% Encode length
-%%
-%% encode_length(Int | indefinite) ->
-%% [<127]| [128 + Int (<127),OctetList] | [16#80]
-%%============================================================================
-
-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}.
-
-
-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_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}.
-
-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.
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-02 09:46:26 +0000